Power generating unit system and control method therefor, electronic device, and storage medium

Abstract

A power generating unit system (10) and a control method, an electronic device, and a storage medium. The power generating unit system (10) comprises: a new energy station (100), an energy storage power station (200), and a voltage coupling device (300). The new energy station (100) is connected to a first side (301) of the voltage coupling device (300), the energy storage power station (200) is connected to a second side (302) of the voltage coupling device (300), and a third side (303) of the voltage coupling device (300) is connected to an alternating-current bus. A zero-carbon power generating unit is implemented, the topological form is simple and the universality is high.

Description

Generator set system and control method thereof, electronic device and storage medium

[0001] Cross-references

[0002] This application refers to Chinese patent application No. 202311016296.1 filed on August 11, 2023, entitled “Generator set system, control method thereof, electronic device and storage medium”, which is incorporated into this application in its entirety by reference. Technical Field

[0003] The present application relates to the field of energy storage technology, and in particular to a generator set system, a control method for the generator set system, an electronic device, a computer-readable storage medium, and a computer program product. Background Art

[0004] To achieve sustainable and high-quality development of renewable energy, it is imperative to build a new energy system. The large-scale development of new energy sources, represented by wind power and photovoltaics (hereinafter referred to as wind and solar power), is an inevitable trend. However, due to the randomness and intermittent nature of renewable energy generation, and with the rapid growth of renewable energy installed capacity, the power system's own absorption capacity is insufficient. The phenomenon of abandoning wind and solar power, such as "abandoning wind" and "abandoning solar power," occurs frequently, and the power system presents a "double high" trend, affecting the stability of the power grid and the scale of renewable energy. Therefore, how to improve the versatility and universality of renewable energy such as wind and solar power has become an urgent problem to be solved.

[0005] Summary of the Invention

[0006] Based on this, it is necessary to provide a general and highly universal generator set system, a control method for the generator set system, an electronic device, a computer-readable storage medium and a computer program product to address the above technical problems.

[0007] In a first aspect, the present application provides a generator set system, the generator set system comprising: a new energy station, an energy storage power station, and a voltage coupling device;

[0008] The new energy station is connected to the first side of the voltage coupling device, the energy storage station is connected to the second side of the voltage coupling device, and the third side of the voltage coupling device is connected to the AC bus;

[0009] The new energy station is used to convert new energy into electrical energy and output the electrical energy;

[0010] The energy storage power station is used to store electrical energy and output electrical energy when enabled;

[0011] The voltage coupling device is used to store at least part of the electric energy output by the new energy station in the energy storage power station, and to transmit at least part of the electric energy output by the new energy station and / or enable the electric energy output by the energy storage power station to the AC bus.

[0012] Based on the generator set system provided in the embodiment of the present application, the new energy station is connected to the first side of the voltage coupling device, the energy storage power station is connected to the second side of the voltage coupling device, and the third side of the voltage coupling device is connected to the AC bus. The voltage coupling device can store at least part of the electric energy output by the new energy station to the energy storage power station, and can transmit at least part of the electric energy output by the new energy station and / or enable the electric energy output by the energy storage power station to the AC bus. Therefore, the new energy station, energy storage power station and voltage coupling device of the generator set system together constitute a generator set system. Since the generator set includes a new energy station, that is, a new energy generator set that realizes new energy power generation, without considering the carbon production during the operation process of the equipment itself, there will usually be no additional carbon production in the new energy power generation process, thereby realizing a zero-carbon level generator set. Its topology is simple, versatile and universal, which is conducive to intelligent expansion.

[0013] In some embodiments, the voltage coupling device couples the new energy electric energy received from the new energy station on the first side and / or the electric energy provided by the energy storage power station on the second side, and transmits the coupled electric energy to the AC bus through the third side.

[0014] Therefore, the new energy electricity generated by the new energy station and the electricity provided by the energy storage power station can be provided to the voltage coupling device. The voltage coupling device can couple the new energy electricity and the electricity from the energy storage power station and transmit them to the AC bus, thereby improving the external power supply capacity of the generator set.

[0015] In some embodiments, the voltage coupling device further couples the new energy electric energy received from the new energy station on the first side and stores it in the energy storage power station.

[0016] The new energy electricity generated by the new energy station can also be stored in the energy storage power station after coupling through voltage coupling equipment, thereby realizing the storage of the new energy electricity generated by the new energy station and further improving the power supply capacity of the generator system.

[0017] In some embodiments, the new energy station has an output terminal for outputting the first electric energy;

[0018] Energy storage power stations, with charging and discharging interfaces, are used to receive and store surplus electricity from new energy stations;

[0019] A voltage coupling device is connected between the output end of the new energy station and the charging and discharging interface of the energy storage power station. The voltage coupling device is used to output the target electric energy in the first electric energy to the AC bus when the first electric energy is greater than the target electric energy, and store the portion of the first electric energy minus the target electric energy as the surplus electric energy; when the first electric energy is equal to the target electric energy, output the target electric energy in the first electric energy to the AC bus; when the first electric energy is less than the target electric energy, enable the energy storage power station to output the second electric energy, so as to generate the target electric energy based on the first electric energy and the second electric energy, and output the target electric energy to the AC bus.

[0020] Based on this embodiment, when the first electric energy provided by the new energy station is equal to the target electric energy, the target electric energy in the first electric energy, that is, the first electric energy, can be directly output to the AC bus to meet the power supply demand of the target electric energy. When the first electric energy is greater than the target electric energy, while outputting the target electric energy in the first electric energy to the AC bus to meet the power supply demand of the target electric energy, the part of the first electric energy minus the target electric energy is stored as the surplus electric energy to realize the storage of surplus electric energy. When the first electric energy is less than the target electric energy, the energy storage power station can be enabled to output the second electric energy to generate the target electric energy based on the first electric energy and the second electric energy and output it to the AC bus to meet the power supply demand of the target electric energy.

[0021] In some embodiments, the new energy station has an output terminal for outputting the first electric energy;

[0022] The energy storage power station has a charging and discharging interface for receiving and storing electric energy output from the new energy station;

[0023] The voltage coupling device is connected between the output terminal of the new energy station and the charging and discharging interface of the energy storage power station;

[0024] The voltage coupling device is used to enable the energy storage station to output the second electric energy when the SOC of the energy storage station is greater than or equal to a preset SOC, so as to generate target electric energy based on the second electric energy and output the target electric energy to the AC bus; when the SOC of the energy storage station is less than the preset SOC, to boost the target electric energy in the first electric energy and output it to the AC bus.

[0025] Based on this embodiment, when the SOC of the energy storage station is greater than or equal to the preset SOC, that is, when the energy storage station has sufficient stored electric energy, the second electric energy is output through the energy storage station to generate the target electric energy based on the second electric energy to meet the power supply demand of the target electric energy, and the power supply through the energy storage station can improve the stability of the power supply. When the SOC of the energy storage station is less than the preset SOC, that is, when the energy storage station has insufficient stored electric energy, the target electric energy in the first electric energy output by the new energy station is boosted and output to the AC bus to meet the power supply demand of the target electric energy.

[0026] In some embodiments, the voltage coupling device is further used to store a portion of the first electric energy minus the target electric energy in the energy storage station when the SOC of the energy storage station is less than the preset SOC and the first electric energy is greater than the target electric energy.

[0027] Based on this embodiment, when the electric energy stored in the energy storage power station is insufficient, if the output of the new energy station is greater than the target electric energy, the portion of the first electric energy minus the target electric energy can be further stored in the energy storage power station, thereby enabling the storage of surplus electric energy.

[0028] In some embodiments, the system further comprises a detection device and a control device;

[0029] The detection equipment is used to detect the station status of the new energy station and the energy storage status of the energy storage power station;

[0030] The control device is used to receive a scheduling instruction and control the working status of the new energy station, the energy storage device and the power coupling device according to the scheduling instruction and the station status and the energy storage status detected by the detection module.

[0031] Based on this embodiment, the station status of the new energy station and the energy storage status of the energy storage power station can be detected by the detection equipment. When the generator set system needs to participate in scheduling, the control device controls the working status of the new energy station, energy storage equipment and power coupling equipment based on the received scheduling instructions and the station status and energy storage status detected by the detection module, thereby meeting the needs of power scheduling.

[0032] In some embodiments, the voltage coupling device comprises a three-winding transformer.

[0033] Through the three-winding transformer, the internal components of the generator system, such as the new energy station and energy storage power station, can be coupled through the three-winding transformer to form a power generation unit, which appears externally as a generator set. Its topology is simple, highly universal, and easy to implement.

[0034] In some embodiments, the first side is a medium pressure side or a low pressure side, the second side is a medium pressure side or a low pressure side, and the third side is a high pressure side.

[0035] Therefore, for new energy power stations and energy storage power stations of different voltage levels, generator sets can be used to generate electricity.

[0036] In some embodiments, the first side is a high-pressure side, the second side is a high-pressure side, and the third side is a medium-pressure side.

[0037] Therefore, medium-voltage power supply can be provided to meet the needs of small-capacity power scenarios.

[0038] In some embodiments, the new energy station includes multiple new energy stations, and the output ends of the multiple new energy stations are all connected to the voltage coupling device.

[0039] Therefore, by configuring multiple new energy stations, the number of new energy stations can be personalized based on system requirements, and new energy stations with different capacity configurations can be realized according to needs, which can meet the design requirements of different generator set systems.

[0040] In some embodiments, the generator set system further includes a bus transformer connected between the output terminal of the new energy station and the voltage coupling device.

[0041] Therefore, when multiple new energy stations are configured, each new energy station is connected to the voltage coupling device through a bus transformer to achieve the convergence of new energy electric energy from multiple new energy stations.

[0042] In some embodiments, the difference between the capacity of the energy storage power station and the actual output of the new energy station is within a preset range.

[0043] Therefore, the difference between the capacity of the energy storage power station and the actual output of the new energy station is within the preset range, indicating that the capacity of the configured energy storage power station matches the actual output of the new energy station. The energy storage of the energy storage power station can meet the storage needs of the actual output of the new energy station without causing a lot of waste of storage capacity. This can improve the ability to absorb the new energy electricity generated by the new energy station and realize an intelligent and expandable low-carbon implementation path.

[0044] In some embodiments, the energy storage power station controls the working state of the energy storage power station based on the change in grid frequency when the generator set system participates in primary frequency regulation.

[0045] Therefore, when the generator system needs to participate in primary frequency regulation, controlling the working state of the energy storage power station in combination with the frequency change of the power grid can alleviate the frequency fluctuation of the power grid and improve the performance of the power grid.

[0046] In some embodiments, the energy storage power station, when the generator set system participates in primary frequency regulation, also sends a charge and discharge status signal to the new energy station;

[0047] The new energy station also obtains the charging and discharging status signals of the energy storage power station, and controls the working status of the new energy station based on the charging and discharging status signals and the change in grid frequency.

[0048] Therefore, the charging and discharging status of the energy storage power station is provided to the new energy power station through the charging and discharging status signal, and the charging and discharging status of the energy storage power station can be combined with the change in grid frequency to control the working status of the new energy station, thereby realizing the linkage between the energy storage power station and the new energy station, and the working status of the new energy station is matched with the charging and discharging status of the energy storage power station, which is conducive to maintaining the performance of the new energy station and can improve the absorption capacity of the new energy electricity generated by the new energy station.

[0049] In some embodiments, the energy storage power station includes a connected energy storage valve and a converter valve.

[0050] Therefore, by configuring an energy storage power station including an energy storage valve and a converter valve, the application of energy storage and power supply can be achieved through the cooperation of the energy storage valve and the converter valve.

[0051] In some embodiments, the energy storage power station includes an AC direct-hung energy storage valve.

[0052] Therefore, the energy storage power station can be realized by using the AC direct-mounted energy storage valve, which can improve the safety and compatibility of the energy storage power station.

[0053] In a second aspect, the present application provides a control method for a generator set system, wherein the generator set system includes a new energy station and an energy storage power station, and the new energy station and the energy storage power station are connected to an AC bus through a voltage coupling device, and the method includes:

[0054] Receive a dispatch instruction, and determine whether the generator system participates in a primary frequency regulation based on the dispatch instruction;

[0055] Obtaining grid frequency measurement values ​​when determining that the generator system participates in primary frequency regulation;

[0056] The operating status of the new energy station and / or energy storage power station is controlled based on the grid frequency measurement value.

[0057] Based on the method of the embodiment of the present application, the generator set system includes a new energy station and an energy storage power station. The new energy station and the energy storage power station are connected to the AC bus through a voltage coupling device. Therefore, the internal components of the generator set system, such as the new energy station and the energy storage power station, can be coupled through the voltage coupling device to form a power generation unit, which is externally manifested as a generator set. Since the generator set contains a new energy station, that is, a new energy generator set that realizes new energy power generation, without considering the carbon production during the operation of the equipment itself, there is usually no additional carbon production in the new energy power generation process, thereby realizing a zero-carbon level generator set. During the control process, the power grid can dispatch the generator set system. After receiving the dispatching instruction, it determines whether the generator set system should participate in a frequency regulation based on the dispatching instruction. If it is to participate in a frequency regulation, the working status of the new energy station and / or the energy storage power station is controlled in combination with the grid frequency measurement value, thereby realizing the scheduling of the grid, meeting the needs of the grid scheduling, and being able to match the grid frequency measurement value to realize a dispatching process that matches the grid state.

[0058] In some embodiments, controlling the operating state of a new energy station and / or an energy storage station based on a grid frequency measurement value includes:

[0059] determining a grid frequency change based on a grid frequency measurement value;

[0060] The operating status of the new energy station and / or energy storage power station is controlled based on the change in grid frequency.

[0061] Therefore, after obtaining the grid frequency measurement value, the grid frequency change is determined based on the grid frequency measurement value, and the working status of the new energy station and / or energy storage power station is controlled based on the grid frequency change, so as to match the change of the grid frequency and realize a scheduling process that matches the grid status.

[0062] In some embodiments, controlling the operating state of a new energy station and / or an energy storage station based on a change in grid frequency includes:

[0063] Get the SOC status of the energy storage power station;

[0064] Based on the frequency change of the power grid and the SOC status of the energy storage power station, the operating status of the new energy station and / or the energy storage power station is controlled.

[0065] Therefore, by combining the charging and discharging status of the energy storage power station with the change in grid frequency to control the working status of the new energy station and / or the energy storage power station, the linkage between the energy storage power station and the new energy station can be achieved, and the working status of the new energy station is matched with the charging and discharging status of the energy storage power station, which is conducive to maintaining the performance of the new energy station and can improve the ability to absorb the new energy electricity generated by the new energy station.

[0066] In some embodiments, controlling the operating state of the new energy station and / or the energy storage station based on the grid frequency variation and the SOC state of the energy storage station includes:

[0067] When the grid frequency change is less than the first dead zone value, and the charge and discharge status is such that the SOC of the energy storage power station is less than the minimum operating setting value, if the new energy station is in the load reduction operation mode, the power of the new energy station is increased; if the new energy station is not in the load reduction operation mode, the new energy station is controlled to be in the maximum power tracking mode.

[0068] Therefore, when the grid frequency change is greater than the dead zone range and less than the first dead zone value, it means that the grid frequency change is large and the grid frequency is decreasing. The generator set system can respond, and the charge and discharge state is that the energy storage power station SOC is less than the minimum operating setting value, which means that the energy storage power station does not have sufficient energy storage. Therefore, when the new energy station is in the load reduction operation mode, it means that the new energy station still has power increase margin. Therefore, by increasing the power of the new energy unit, the overall power of the generator set system can be increased to meet the system demand. When the new energy station is not in the load reduction operation mode, the new energy station can be controlled to be in the maximum power tracking mode to capture new energy resources to the greatest extent, so that the overall power of the generator set system can be increased.

[0069] In some embodiments, controlling the operating state of the new energy station and / or the energy storage station based on the grid frequency variation and the SOC state of the energy storage station includes:

[0070] When the grid frequency change is less than the first dead zone value, and the charge and discharge status of the energy storage power station is such that the SOC of the energy storage power station is less than the minimum operating setting value, if the new energy station is in the load reduction operation mode, the energy storage power station is controlled to enter the charging mode; if the new energy station is not in the load reduction operation mode, the energy storage power station is controlled to stop outputting power.

[0071] Therefore, when the grid frequency change is greater than the deadband range and less than the first deadband value, it indicates that the grid frequency change is significant and is decreasing, and the generator system can respond. However, if the charge and discharge status is that the energy storage station SOC is less than the minimum operating setting value, it means that the energy storage station has insufficient energy storage. If the new energy station is in load reduction mode, it means that the new energy station still has power increase margin, and the energy storage station can be charged simultaneously through the new energy station. Therefore, the energy storage station is controlled to enter charging mode. If the new energy station is not in load reduction mode, it means that the power increase margin of the new energy station is not sufficient, and the energy storage station is controlled to stop output to maintain the energy storage performance of the energy storage station.

[0072] In some embodiments, controlling the operating state of the new energy station and / or the energy storage station based on the grid frequency variation and the SOC state of the energy storage station includes:

[0073] When the grid frequency change is less than the first dead zone value and the charge and discharge status is that the SOC of the energy storage power station is normal or greater than the maximum operating set value, the new energy station is controlled to be in maximum power tracking mode.

[0074] Therefore, when the grid frequency change is greater than the dead zone range and less than the first dead zone value, it means that the grid frequency change is large and the grid frequency is decreasing. The generator set system can respond, and the charge and discharge status is that the SOC of the energy storage power station is normal or greater than the maximum operating setting value, which means that the energy storage power station has sufficient energy storage. Therefore, the new energy station is controlled to be in maximum power tracking mode to capture new energy resources to the greatest extent, so that the overall power of the generator set system is increased.

[0075] In some embodiments, controlling the operating state of the new energy station and / or the energy storage station based on the grid frequency variation and the SOC state of the energy storage station includes:

[0076] When the grid frequency variation is less than the first dead zone value and the charge and discharge state is that the SOC of the energy storage power station is normal or greater than the maximum operating setting value, the energy storage power station is controlled to perform the inertia and frequency regulation processing of the power generation.

[0077] Therefore, when the grid frequency change is greater than the dead zone range and less than the first dead zone value, it means that the grid frequency change is large and the grid frequency becomes smaller. The generator set system can respond, and the charge and discharge status is that the SOC of the energy storage station is normal or greater than the maximum operating setting value, which means that the energy storage station has sufficient energy storage. Therefore, the energy storage station performs the inertia and frequency modulation processing of the power generation to meet the power dispatching needs.

[0078] In some embodiments, controlling the operating state of the new energy station and / or the energy storage station based on the grid frequency variation and the SOC state of the energy storage station includes:

[0079] When the grid frequency change is greater than the second dead zone value and the charge and discharge status is that the SOC of the energy storage power station is normal or less than the minimum operating setting value, the new energy station is controlled to be in maximum power tracking mode.

[0080] Therefore, when the grid frequency change is greater than the dead zone range and greater than the second dead zone value, it means that the grid frequency change is large and the grid frequency increases. The generator set system can respond, but the charging and discharging status of the energy storage power station is that the energy storage power station SOC is normal or less than the minimum operating setting value, indicating that the energy storage power station has insufficient energy storage. Therefore, the new energy station is controlled to be in maximum power tracking mode to capture new energy resources to the greatest extent, so that the overall power of the generator set system is reduced.

[0081] In some embodiments, controlling the operating state of the new energy station and / or the energy storage station based on the grid frequency variation and the SOC state of the energy storage station includes:

[0082] When the grid frequency variation is greater than the second dead zone value and the charge and discharge state is that the SOC of the energy storage power station is normal or less than the minimum operating setting value, the energy storage power station is controlled to perform the inertia and frequency regulation process of absorbing power.

[0083] Therefore, when the grid frequency change is greater than the dead zone range and greater than the second dead zone value, it means that the grid frequency change is large and the grid frequency increases. The generator system can respond, and the charging and discharging status of the energy storage station is that the energy storage station SOC is normal or less than the minimum operating setting value, which means that there is still energy storage space in the energy storage station. Therefore, the inertia of the energy storage station to absorb power and the frequency regulation process are controlled to meet the power dispatching needs.

[0084] In some embodiments, controlling the operating state of the new energy station and / or the energy storage station based on the grid frequency variation and the SOC state of the energy storage station includes:

[0085] When the grid frequency change is greater than the second dead zone value and the charge and discharge state is such that the SOC of the energy storage power station is greater than the maximum operating set value, the new energy station is controlled to enter the load reduction operation mode.

[0086] Therefore, when the grid frequency change is greater than the dead zone range and greater than the second dead zone value, it means that the grid frequency change is large and the grid frequency increases, the generator set system can respond, and the charging and discharging status of the energy storage power station is that the energy storage power station SOC is greater than the maximum operating setting value, indicating that the energy storage power station has sufficient energy storage. By controlling the new energy station to enter the load reduction operation mode, the overall power of the generator set system can be reduced.

[0087] In some embodiments, controlling the operating state of the new energy station and / or the energy storage station based on the grid frequency variation and the SOC state of the energy storage station includes:

[0088] When the grid frequency variation is greater than the second dead zone value and the charge and discharge state is such that the SOC of the energy storage power station is greater than the maximum operating set value, the energy storage power station is controlled to stop outputting power.

[0089] Therefore, when the grid frequency change is greater than the dead zone range and greater than the second dead zone value, it means that the grid frequency change is large and the grid frequency increases. The generator set system can respond, and the charging and discharging state of the energy storage power station is that the charge state of the energy storage power station is greater than the maximum operating setting value. The energy storage power station has sufficient energy storage. By controlling the energy storage power station to no longer output power, the overall power of the generator set system is reduced.

[0090] In some embodiments, controlling the energy storage power station to stop generating power includes:

[0091] Control the energy storage valve of the energy storage power station to exit operation.

[0092] In a third aspect, the present application provides a control device for a generator set system, wherein the generator set system includes a new energy station and an energy storage power station, wherein the new energy station and the energy storage power station are connected to an AC bus through a voltage coupling device, and the device includes:

[0093] A dispatch instruction determination module is used to obtain a dispatch instruction and determine whether the generator system participates in a primary frequency regulation based on the dispatch instruction;

[0094] A measurement value acquisition module, used for acquiring a grid frequency measurement value when it is determined that the generator set system participates in a primary frequency regulation;

[0095] The control module is used to control the operating status of the new energy station and / or energy storage power station based on the grid frequency measurement value.

[0096] In a fourth aspect, the present application provides an electronic device comprising a memory and a processor, wherein the memory stores a computer program, wherein the processor implements the steps of the method in any of the embodiments described above when executing the computer program.

[0097] In a fifth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the steps of the method in any one of the embodiments described above are implemented.

[0098] In a sixth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the steps of the method in any one of the embodiments described above are implemented.

[0099] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0100] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0101] FIG1 is a schematic diagram of the topological structure of a generator set system according to some embodiments of the present application;

[0102] FIG2 is a schematic diagram of the topological structure of a generator set system according to some other embodiments of the present application;

[0103] FIG3 is a schematic diagram of the topological structure of an energy storage power station in some embodiments of the present application;

[0104] FIG4 is a schematic diagram of the topological structure of a DC direct-mounted energy storage valve in some embodiments of the present application;

[0105] FIG5 is a schematic diagram of a topological structure of a converter valve connected to the grid in an energy storage power station in some embodiments of the present application;

[0106] FIG6 is a schematic diagram showing the principle of active / reactive output control of a converter valve in some embodiments of the present application;

[0107] FIG7 is a schematic diagram of the logic principle of active / reactive output control of a converter valve in some specific embodiments of the present application;

[0108] FIG8 is a schematic diagram of the logic principle of a voltage command generation module during active / reactive power output control in some embodiments of the present application;

[0109] FIG9 is a schematic diagram of an AC direct-mounted energy storage valve in some embodiments of the present application;

[0110] FIG10 is a flow chart of a method for controlling a generator set system in some embodiments of the present application;

[0111] FIG11 is a schematic diagram of a process for controlling the operating states of a new energy station and an energy storage power station based on grid frequency measurement values ​​in some embodiments of the present application;

[0112] FIG12 is a schematic diagram of a process for controlling the operating states of a new energy station and an energy storage power station based on a change in grid frequency in some embodiments of the present application;

[0113] FIG13 is a flow chart of a method for controlling a generator set system in some specific embodiments of the present application;

[0114] FIG14 is a structural block diagram of a control device for a generator set system in some embodiments of the present application;

[0115] FIG15 is a diagram showing the internal structure of an electronic device according to some embodiments of the present application.

[0116] Reference numerals

[0117] 10, generator system; 100, new energy station; 200, energy storage power station; 300, voltage coupling device; 301, first side; 302, second side; 303, third side; 201, energy storage valve; 202, converter valve; 212, voltage command generation module; 222, overcurrent suppression module; 232, voltage command control module; 2121, virtual synchronous machine module; 2122, comparison and analysis module; 2123, command generation module; DETAILED DESCRIPTION

[0118] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0119] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0120] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0121] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0122] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0123] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0124] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0125] In the description of the embodiments of this application, unless otherwise specified or limited, technical terms such as "connection" should be understood in a broad sense. For example, it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to internal communication between two components or an interaction between two components. For those skilled in the art, the specific meanings of the above terms in the embodiments of this application can be understood based on the specific circumstances.

[0126] Currently, developing renewable energy sources, such as wind power and photovoltaics, has become a key goal in building a new power system. However, wind power and photovoltaics are susceptible to weather conditions, exhibiting random and intermittent characteristics. Furthermore, with the rapid growth of renewable energy installed capacity, the power system's inherent capacity to absorb this energy is insufficient, leading to frequent abandonment of wind and solar power. Furthermore, with the increasing proportion of renewable energy connected through power electronics, the new power system is exhibiting a weak grid structure with low inertia and short-circuit ratio. This requires renewable energy to actively support the power system to maintain system stability and enhance its absorption.

[0127] Energy storage, as a flexible control tool that enables the timely shift of energy on demand, is a crucial technology and core equipment for adapting to the new energy system. Regarding the current renewable energy transmission system, how to achieve this, upgrade renewable energy to high-quality power sources, and achieve decarbonization and carbon reduction in the energy internet are pressing issues.

[0128] After research, it was found that the new energy station can be combined with the energy storage power station and combined with the voltage coupling device to form a power generation unit, which can be externally manifested as a generator set, or also called a generator set system. Since the generator set contains a new energy station, that is, a new energy generator set that realizes new energy power generation, without considering the carbon production during the operation of the equipment itself, there is usually no additional carbon production during the new energy power generation process, thereby realizing a low-carbon generator set. The low-carbon generator set can be connected to the power grid and receive the dispatch of the power grid, thereby improving the power grid's ability to absorb new energy. It should be understood that although carbon may be produced during the operation of the equipment itself, the carbon production during the operation process is much smaller than the carbon production during the power generation process (such as the carbon production in thermal power generation). The two are not on the same order of magnitude. Therefore, the generator set can be considered a zero-carbon generator set. In the following embodiments, the generator set is also referred to as a zero-carbon generator set.

[0129] 1 , an embodiment of the present application provides a generator set system. The generator set system 10 includes: a new energy station 100, an energy storage station 200, and a voltage coupling device 300, wherein:

[0130] The new energy station 100 is connected to the first side 301 of the voltage coupling device 300 , the energy storage power station 200 is connected to the second side 302 of the voltage coupling device 300 , and the third side 303 of the voltage coupling device 300 is connected to the AC bus.

[0131] The new energy station 100 is used to convert new energy into electrical energy and output the electrical energy;

[0132] Energy storage power station 200, used to store electrical energy and output electrical energy when enabled;

[0133] The voltage coupling device 300 is used to store at least part of the electric energy output by the new energy station 100 in the energy storage power station 200, and to transmit at least part of the electric energy output by the new energy station 100 and / or the electric energy output by the energy storage power station 200 to the AC bus.

[0134] Among them, the new energy station 100 is an organization used to convert new energy such as wind energy and light energy into electrical energy. A typical new energy station is equipped with new energy units. Typical new energy units can include one or two of wind turbines and photovoltaic arrays, which can be determined based on the construction needs of the new energy station. For example, in some areas, the wind is strong but the sunlight is insufficient, so only wind turbines can be equipped. In some areas, the wind is weak but the sunlight is sufficient, so only photovoltaic arrays can be equipped. In some areas, the wind is sufficient and the sunshine time is sufficient, so the new energy station can be equipped with both wind turbines and photovoltaic arrays. Under normal circumstances, there will be wind blowing and sunshine time in any area, so all new energy stations can be equipped with wind turbines and photovoltaic arrays. The specific ratio of wind turbines and photovoltaic arrays can be determined based on the wind resources and sunshine time in the area where the new energy station is located. The embodiment of the present application does not limit the type of new energy units configured in the new energy station.

[0135] The energy storage power station 200 is a mechanism for storing electric energy. It can store electric energy and output the stored electric energy when needed to provide electric energy to the outside.

[0136] The voltage coupling device 300 is a device capable of voltage coupling. It can transfer voltage from one side of the voltage coupling device to the other side, achieving voltage transfer. During the transfer process, the voltage level may not be adjusted, or the voltage level may be adjusted simultaneously, for example, by stepping down or stepping up the transferred voltage. It has high isolation and high security. New energy stations and energy storage power stations are coupled using the voltage coupling device to achieve short-distance power and signal transmission between stations. By placing the control equipment of the generator system near the voltage coupling device, energy can be uniformly allocated, reducing the delay caused by remote communication, and achieving a fast response speed, enabling rapid response to grid demand. Unified energy management of new energy stations and energy storage power stations is performed in the voltage coupling device area, reducing wind and solar power curtailment and energy loss.

[0137] In the generator set system according to the embodiment of the present application, the new energy station 100 is connected to the first side 301 of the voltage coupling device 300, the energy storage station 200 is connected to the second side 302 of the voltage coupling device 300, and the third side 303 of the voltage coupling device 300 is connected to the AC bus. The voltage coupling device can store at least a portion of the electric energy output by the new energy station in the energy storage station, and can transmit at least a portion of the electric energy output by the new energy station and / or enable the electric energy output by the energy storage station to the AC bus. Thus, the new energy station, the energy storage station, and the voltage coupling device can be coupled to form a power generation unit, which is externally manifested as a generator set. Since the generator set includes the new energy station, that is, a new energy generator set that realizes new energy power generation, without considering the carbon production during the operation of the equipment itself, there is generally no additional carbon production during the new energy power generation process, thereby realizing a zero-carbon generator set. Its topology is simple, versatile, and highly universal, which is conducive to intelligent expansion.

[0138] Among them, in a specific scenario, the electric energy provided by the generator set system 10 to the AC bus can be provided only by the new energy station 100. The surplus electric energy generated by the new energy station 100 can be stored in the energy storage power station 200, so that when needed, the energy storage power station 200 and the new energy station 100 can jointly provide electric energy to the AC bus. It can also be provided only by the energy storage power station 200, or when the electric energy stored in the energy storage power station 200 is insufficient, the electric energy output by the new energy station 100 can be transmitted to the AC bus. Examples are given below to illustrate these two aspects.

[0139] In some embodiments, the voltage coupling device couples the new energy electric energy received from the new energy station on the first side and / or the electric energy provided by the energy storage power station on the second side, and transmits the coupled electric energy to the AC bus through the third side.

[0140] As shown in Figure 1, when power is needed, the new energy station 100 generates and outputs new energy power, which is also referred to as first power in the relevant embodiments of this application. This new energy power is transmitted to the first side 301 of the voltage coupling device 300. The voltage coupling device 300 couples the new energy power and transmits it to the AC bus via the third side 303 to provide power to the power grid. When power is needed, the energy storage station 200 can also provide stored power to the second side 302 of the voltage coupling device 300. The voltage coupling device 300 couples the stored power and transmits it to the AC bus via the third side 303 to provide power to the power grid. The power output by the energy storage station 200 is also referred to as second power in the relevant embodiments of this application. In some embodiments, the voltage coupling device 300 can also couple the new energy power provided by the new energy station 100 with the power provided by the energy storage station and transmit it to the AC bus via the third side 303 to provide power to the power grid.

[0141] Therefore, the new energy electricity generated by the new energy station and the electricity provided by the energy storage power station can be provided to the voltage coupling device. The voltage coupling device can couple the new energy electricity and the electricity of the energy storage power station and transmit them to the AC bus, thereby realizing external power supply.

[0142] In some embodiments, the voltage coupling device further couples the new energy electric energy received from the new energy station on the first side and stores it in the energy storage power station.

[0143] As shown in Figure 1, the new energy station 100 generates new energy electricity, which is transmitted to the first side 301 of the voltage coupling device 300. The voltage coupling device 300 couples the new energy electricity. After coupling, the voltage coupling device 300 stores the new energy electricity in the energy storage power station 200 through the second side 302.

[0144] Therefore, the new energy electricity generated by the new energy station can also be stored in the energy storage power station after coupling through the voltage coupling device, thereby realizing the storage of the new energy electricity generated by the new energy station and supplementing the electricity stored in the energy storage power station, thereby improving the power supply capacity of the generator set system.

[0145] In some embodiments, the new energy station has an output terminal for outputting the first electric energy;

[0146] Energy storage power stations, with charging and discharging interfaces, are used to receive and store surplus electricity from new energy stations;

[0147] A voltage coupling device is connected between the output end of the new energy station and the charging and discharging interface of the energy storage power station. The voltage coupling device is used to output the target electric energy in the first electric energy to the AC bus when the first electric energy is greater than the target electric energy, and store the portion of the first electric energy minus the target electric energy as the surplus electric energy; when the first electric energy is equal to the target electric energy, output the target electric energy in the first electric energy to the AC bus; when the first electric energy is less than the target electric energy, enable the energy storage power station to output the second electric energy, so as to generate the target electric energy based on the first electric energy and the second electric energy, and output the target electric energy to the AC bus.

[0148] Among them, the target power refers to the power that the generator system as a whole needs to provide to the outside, and the specific power amount can be determined based on the scheduling requirements.

[0149] Based on this embodiment, when the first electric energy provided by the new energy station is equal to the target electric energy, the target electric energy in the first electric energy, that is, the first electric energy, can be directly output to the AC bus to meet the power supply demand of the target electric energy. When the first electric energy is greater than the target electric energy, while outputting the target electric energy in the first electric energy to the AC bus to meet the power supply demand of the target electric energy, the part of the first electric energy minus the target electric energy is stored as the surplus electric energy to realize the storage of surplus electric energy. When the first electric energy is less than the target electric energy, the energy storage power station can be enabled to output the second electric energy to generate the target electric energy based on the first electric energy and the second electric energy and output it to the AC bus to meet the power supply demand of the target electric energy.

[0150] In some embodiments, the new energy station has an output terminal for outputting the first electric energy;

[0151] The energy storage power station has a charging and discharging interface for receiving and storing electric energy output from the new energy station;

[0152] The voltage coupling device is connected between the output terminal of the new energy station and the charging and discharging interface of the energy storage power station;

[0153] The voltage coupling device is used to enable the energy storage station to output the second electric energy when the SOC of the energy storage station is greater than or equal to a preset SOC, so as to generate target electric energy based on the second electric energy and output the target electric energy to the AC bus; when the SOC of the energy storage station is less than the preset SOC, to boost the target electric energy in the first electric energy and output it to the AC bus.

[0154] Based on this embodiment, when the SOC of the energy storage station is greater than or equal to the preset SOC, that is, when the energy storage station has sufficient stored electric energy, the second electric energy is output through the energy storage station to generate the target electric energy based on the second electric energy to meet the power supply demand of the target electric energy, and the power supply through the energy storage station can improve the stability of the power supply. When the SOC of the energy storage station is less than the preset SOC, that is, when the energy storage station has insufficient stored electric energy, the target electric energy in the first electric energy output by the new energy station is boosted and output to the AC bus to meet the power supply demand of the target electric energy.

[0155] In some embodiments, the voltage coupling device is further used to store a portion of the first electric energy minus the target electric energy in the energy storage station when the SOC of the energy storage station is less than the preset SOC and the first electric energy is greater than the target electric energy.

[0156] Based on this embodiment, when the electric energy stored in the energy storage power station is insufficient, if the output of the new energy station is greater than the target electric energy, the portion of the first electric energy minus the target electric energy can be further stored in the energy storage power station, thereby enabling the storage of surplus electric energy.

[0157] In some embodiments, the system further comprises a detection device and a control device;

[0158] The detection equipment is used to detect the station status of the new energy station and the energy storage status of the energy storage power station;

[0159] The control device is used to receive a scheduling instruction and control the working status of the new energy station, the energy storage device and the power coupling device according to the scheduling instruction and the station status and the energy storage status detected by the detection module.

[0160] Based on this embodiment, the station status of the new energy station and the energy storage status of the energy storage power station can be detected by the detection equipment. When the generator set system needs to participate in scheduling, the control device controls the working status of the new energy station, energy storage equipment and power coupling equipment based on the received scheduling instructions and the station status and energy storage status detected by the detection module, thereby meeting the needs of power scheduling.

[0161] Among them, there is no limit to the way the control equipment controls the working status of the new energy station, detection equipment and power coupling equipment.

[0162] Taking the control of new energy stations as an example, the control device can determine whether the new energy station needs to participate in frequency regulation (for example, whether it needs to enter the state of converting new energy into electrical energy) and the working mode when participating in frequency regulation (such as whether it is in MTTP operation mode or load reduction operation mode, etc.) based on the scheduling instructions, and then determine the control instructions that need to be sent to the new energy station. The new energy station executes related operations based on the control instructions to determine whether it needs to enter the state of converting new energy into electrical energy and the specific working mode.

[0163] Taking the control of an energy storage power station as an example, the control device can determine, based on the dispatching instructions, whether the energy storage power station needs to participate in frequency modulation (for example, whether it needs to export electric energy), as well as the working mode when participating in frequency modulation (such as whether it is in a charging state or a discharging state, and the charging mode in the charging state or the discharging mode in the discharging state, etc.), and the working mode when not participating in frequency modulation (such as whether charging is required, and the charging mode in the charging state), and then determine the control instructions that need to be sent to the energy storage power station. The energy storage power station performs the corresponding charging or discharging operations based on the control instructions.

[0164] Taking the control device for the power coupling device as an example, the control device can determine, based on the scheduling instruction, whether the power coupling device needs to couple and transmit the power output by the new energy station to the AC bus, or whether it needs to enable the energy storage power station to output power and couple and transmit it to the AC bus, or whether it needs to couple and transmit both the power of the new energy station and the power output of the energy storage power station to the AC target, or whether it can be the power output by the new energy station, the power coupled to the AC bus and the power coupled to the energy storage power station for storage, etc., and then determine the control instruction that needs to be sent to the power coupling device, and the power coupling device performs the corresponding charging operation or discharging operation based on the control instruction.

[0165] It should be understood that in the description of each embodiment of the present application, the various processing processes or functions implemented by the new energy station, energy storage power station, and power coupling device can all be completed upon receiving a control instruction from the control device, or can be performed based on the control decision jointly determined after the control module of the new energy station, the control module of the energy storage power station, and the control module of the power coupling device communicate with each other. Taking the example of all being completed upon receiving a control instruction from the control device, the control device can be part of the new energy station, energy storage power station, or power coupling device, or can be set up independently of the new energy station, energy storage power station, and power coupling device. Taking the example of being independent of the new energy station, energy storage power station, and power coupling device, the control device can be set at a location within a preset distance range from the power coupling device, or the location of the control device can be determined in combination with the location of the new energy station, energy storage power station, and power coupling device to reduce communication costs and improve communication efficiency.

[0166] In some embodiments, the voltage coupling device comprises a three-winding transformer.

[0167] A three-winding transformer has three sides, each of which is provided with a transformer coil, so it is called a three-winding transformer. The voltage level of each side is not limited. Usually, a three-winding transformer is a transformer with three voltage levels: high voltage, medium voltage, and low voltage, and a transformer coil is provided on the high voltage side, medium voltage side, and low voltage side respectively. Based on actual technical needs, the voltage level of each side can also be set in other ways, such as having three levels of high voltage, medium voltage, and medium voltage, or having three levels of high voltage, low voltage, and low voltage, or having three levels of medium voltage, low voltage, and low voltage. Among them, high voltage usually refers to the voltage level of electric energy transmitted on the transmission line, such as the voltage level of the sending end of the ultra-high voltage converter station; medium voltage usually refers to the voltage level of intermediate substation equipment (such as substations, transformers, etc.); low voltage usually refers to the voltage level of electric energy provided by the distribution network. Based on the different standards for grid configuration in different regions, the specific voltage ranges of high voltage, medium voltage and low voltage may be different. For example, the low voltage range in some areas is less than or equal to 6kV, the medium voltage range is greater than 6kV and less than or equal to 35kV, and the high voltage range is greater than 35kV.

[0168] The three-winding transformer is based on Faraday's law of electromagnetic induction. When an alternating current passes through one of the winds, a magnetic field will be generated in the iron core of the transformer. This magnetic field will be conducted to the other two winds through the iron core, thereby inducing a voltage in the other two winds, thereby realizing voltage transmission. Among them, the transformation ratio of each wind can be determined by the turns ratio of each wind, and the transformation ratio is equal to the number of turns on the high-voltage side divided by the number of turns on the low-voltage side. According to the relationship between the transformation ratios, the high-voltage wind has more turns and generates a higher voltage, while the low-voltage wind has fewer turns and generates a lower voltage. The transformation ratio of the three-winding transformer and the number of turns on each side can be determined in combination with the level of electric energy that can be provided by the new energy power station, the energy storage level of the energy storage power station, etc., and are not specifically limited in the embodiments of this application.

[0169] Therefore, through the three-winding transformer, the internal components of the generator system, such as the new energy station and energy storage power station, can be coupled through the three-winding transformer to form a power generation unit, which appears to the outside as a zero-carbon generator set, thus realizing a zero-carbon level generator set. Its topology is simple and has high universality. It can realize an intelligent and expandable low-carbon implementation path and is easy to implement.

[0170] In some embodiments, the first side is a medium pressure side or a low pressure side, the second side is a medium pressure side or a low pressure side, and the third side is a high pressure side.

[0171] Therefore, generator sets can be used for generating electricity in new energy power stations and energy storage power stations of different voltage levels. The third side connected to the AC bus is the high-voltage side, thus meeting the power supply requirements of the high-voltage transmission line.

[0172] In some embodiments, the first side is a high-pressure side, the second side is a high-pressure side, and the third side is a medium-pressure side.

[0173] Therefore, medium-voltage power supply can be provided to meet the needs of small-capacity power scenarios.

[0174] In some embodiments, the new energy station includes multiple new energy stations, and the output ends of the multiple new energy stations are all connected to the voltage coupling device.

[0175] Taking the first side as the medium voltage side or the low voltage side, the second side as the medium voltage side or the low voltage side, and the third side as the high voltage side as an example, as shown in Figure 2, it is explained by taking two new energy stations, and each new energy station is also provided with a wind turbine (set in the wind farm) and a photovoltaic module as an example. It can be understood that in the specific implementation, the number of new energy stations and the number of wind turbines and photovoltaic modules set at each new energy station can be set in combination with actual technical needs, and the embodiments of this application are not specifically limited. By setting different proportions of wind turbines and photovoltaic modules according to demand, and configuring the capacity of wind turbines and photovoltaic modules based on the actual technical scenario needs, it can be applied to large-scale new energy base AC / DC transmission systems, microgrid systems, offshore wind farm transmission, regional power grid interconnection and other scenarios to achieve a high proportion of new energy consumption. Ideally, 100% of new energy consumption can be achieved, and a low-carbon implementation path that can be intelligently expanded can be achieved.

[0176] In some embodiments, the generator set system further includes a bus transformer connected between the output terminal of the new energy station and the voltage coupling device.

[0177] Among them, each new energy station can be connected to the busbar through a busbar transformer, and then connected to the first side of the voltage coupling device through the busbar.

[0178] There is no limit to the type of busbar transformer, as long as it is a transformer that can realize the convergence of electric energy provided by multiple new energy stations onto the busbar.

[0179] Thus, when multiple new energy stations are configured, each is connected to the busbar via a busbar transformer, and then connected to the first side of the voltage coupling device via the busbar, thereby achieving the convergence of new energy power from multiple new energy stations. By configuring multiple new energy stations, each of which is connected to the busbar via a busbar transformer, the number and capacity of new energy stations can be customized based on system requirements. New energy stations with different capacity configurations can be implemented as needed to meet the design requirements of different generator set systems.

[0180] In some embodiments, the difference between the capacity of the energy storage power station and the actual output of the new energy station is within a preset range.

[0181] The capacity of an energy storage station refers to the amount of electricity it can store, while the actual output of a new energy station refers to the amount of electricity it can actually generate, typically expressed in terms of power.

[0182] The difference between the capacity of the energy storage power station and the actual output of the new energy station is within the preset range, indicating that the capacity of the energy storage power station matches the actual output of the new energy station, that is, the rated storage capacity of the energy storage power station matches the actual output of the new energy station. In the case of matching, the actual power generated by the new energy station can be stored in the energy storage power station, and the energy storage power station has no excess storage capacity or even if there is excess storage capacity, it is not excessive.

[0183] The difference between the capacity of the energy storage power station and the actual output of the new energy station is within a preset range. The rated storage capacity of the energy storage power station can be equal to the actual output of the new energy station, or the rated storage capacity of the energy storage power station can be greater than the actual output of the new energy station, but not exceeding a predetermined percentage of the actual output of the new energy station. The predetermined percentage can be set based on actual technical needs.

[0184] Taking the actual output of 600MW (megawatt) of a new energy station as an example, if it is configured according to 20%-2 hours of capacity, a 120MW / 240MWh energy storage station can be configured.

[0185] Therefore, by configuring the capacity of the energy storage power station so that the difference with the actual output of the new energy station is within a preset range, the capacity of the energy storage power station is matched with the actual output of the new energy station, and the matching of storage capacity and actual output of new energy is achieved, so that the electricity generated by the new energy station can be stored in the energy storage power station, reducing the situation where the new energy station generates more electricity but cannot store it, and the energy storage power station will not have too much waste of capacity space, which can improve the ability to absorb the new energy electricity generated by the new energy station and realize an intelligent and expandable low-carbon implementation path.

[0186] In some embodiments, the actual output of the new energy station is determined based on the maximum capacity and concurrency of the new energy station.

[0187] The maximum capacity of a new energy station is the absolute maximum output of the station, which is the sum of the absolute maximum loads of its components. The concurrency rate is the ratio of the combined maximum load of the station to the absolute maximum loads of its components.

[0188] In some embodiments, the actual output of the new energy station may be the product of the maximum capacity of the new energy station and the concurrency rate.

[0189] Therefore, the actual output of the new energy station can be accurately determined through the maximum capacity and concurrency rate of the new energy station. On this basis, the configuration of the energy storage power station can achieve a high degree of matching between the storage capacity of the energy storage power station and the actual output of the new energy.

[0190] In some embodiments, the energy storage power station controls the working state of the energy storage power station based on the change in grid frequency when the generator set system participates in primary frequency regulation.

[0191] Primary frequency regulation refers to an automatic control process that limits the frequency change of the power grid by automatically controlling the increase or decrease of the active power of the units in the power grid once the frequency of the power grid deviates from the rated value, thereby maintaining a stable power grid frequency. Whether the generator set system needs to participate in the primary frequency regulation can be determined in various possible ways, for example, by receiving a dispatch instruction from the power system, which specifies that the generator set system needs to participate in the primary frequency regulation. For example, the power dispatch system has pre-set the time for each generator set to participate in the primary frequency regulation, and when the generator set system needs to participate in the primary frequency regulation, it is determined that the generator set system needs to participate in the primary frequency regulation. In other embodiments, whether the generator set system needs to participate in the primary frequency regulation can also be determined in other ways, which can be based on the dispatch strategy of the power dispatch system. The embodiments of the present application do not limit this.

[0192] The grid frequency variation refers to the variation of the grid frequency, which may be the difference between the grid frequency value of the current scheduling cycle and the grid frequency value of the previous cycle.

[0193] Therefore, when the generator system needs to participate in primary frequency regulation, controlling the working state of the energy storage power station in combination with the frequency change of the power grid can alleviate the frequency fluctuation of the power grid and improve the performance of the power grid.

[0194] In some embodiments, the energy storage power station, when the generator set system participates in primary frequency regulation, also sends a charge and discharge status signal to the new energy station;

[0195] The new energy station also obtains the charging and discharging status signals of the energy storage power station, and controls the working status of the new energy station based on the charging and discharging status signals and the change in grid frequency.

[0196] The charge / discharge status signal is a signal sent by the energy storage station based on its state of charge (SOC). The charge / discharge status is the state of charge, which reflects the remaining capacity. Therefore, the charge / discharge status of the energy storage station reflects the remaining capacity of the energy storage station, such as whether the remaining storage capacity of the energy storage station is sufficient.

[0197] The charge and discharge status signal sent by the energy storage power station to the new energy station is used to notify the new energy station of the charge and discharge status of the energy storage power station. The charge and discharge status signal may include the charge and discharge status, or may be information indicating a further status generated based on the charge and discharge status. For example, a first value indicates that the SOC of the energy storage power station is greater than the maximum operating set value, indicating that the energy storage power station has sufficient energy storage space; a second value indicates that the SOC of the energy storage power station is less than the minimum operating set value, indicating that the energy storage power station has insufficient energy storage space, or that the energy storage power station is relatively full. It should be understood that the charge and discharge status signal may also be generated in other ways, and the embodiments of this application do not specifically limit this.

[0198] Therefore, when the generator set system participates in a frequency modulation process, the charging and discharging status of the energy storage power station is provided to the new energy power station through the charging and discharging status signal. The charging and discharging status of the energy storage power station can be combined with the change in grid frequency to control the working status of the new energy station, thereby realizing the linkage between the energy storage power station and the new energy station, and the working status of the new energy station is matched with the charging and discharging status of the energy storage power station, which is conducive to maintaining the performance of the new energy station and can improve the absorption capacity of the new energy electricity generated by the new energy station.

[0199] In some embodiments, the energy storage power station is further used to control the energy storage power station to enter a charging mode if the new energy station is in a load reduction operation mode, and to control the energy storage power station to stop outputting power if the new energy station is not in a load reduction operation mode, when the change in grid frequency is less than a first dead zone value and the charge and discharge state of the energy storage power station is such that the SOC of the energy storage power station is less than a minimum operating set value.

[0200] The dead zone range of the power grid represents the range within which the grid frequency can fluctuate. By setting the dead zone range, frequency modulation control can be performed even when the dead zone range is exceeded, reducing the possibility of frequent frequency modulation control and maintaining grid stability. The first dead zone value is the minimum value of the dead zone range, and the maximum value of the dead zone range is referred to as the second dead zone value in this embodiment of the application.

[0201] The deadband range is typically set based on a set value combined with a fluctuation range. For example, it can be expressed as M±a, where Ma is the first deadband value and M+a is the second deadband value, with both M and a being greater than 0. If the grid frequency change is less than the first deadband value, it indicates a significant grid frequency change, requiring frequency modulation control. Furthermore, the grid frequency has decreased, requiring a power increase. If the grid frequency change is greater than the second deadband value, it indicates a significant grid frequency change, requiring frequency modulation control, requiring a power decrease.

[0202] Load reduction mode refers to a mode in which a new energy station operates at a reduced power level. This means the station is not operating at full power. The specific load reduction method is not limited. In this mode, the station still has room for increased power, meaning the station's power can be further increased. When full-load power is not required, the station can operate in load reduction mode, thereby extending its service life while meeting power demands.

[0203] Among them, the minimum operating setting value is the minimum state of charge that the energy storage power station needs to meet. Its specific value can be set in combination with actual technical needs and is not specifically limited in the embodiments of this application.

[0204] Controlling the energy storage station to stop generating power refers to controlling the energy storage station to stop generating electric power, for example, controlling the stored energy to stop generating active power, or controlling the energy storage station to stop performing charging and discharging operations, etc. In other embodiments, the energy storage station may be controlled to stop generating electric power in other ways.

[0205] Therefore, when the grid frequency change is greater than the dead zone range and less than the first dead zone value, it means that the grid frequency change is large and the grid frequency becomes smaller, and the generator system can respond. The charge and discharge status is that the SOC of the energy storage power station is less than the minimum operating setting value, which means that the energy storage power station has sufficient energy storage space. When the new energy station is in the load reduction operation mode, it means that the new energy station still has a power increase margin. Therefore, the energy storage station can be controlled to enter the charging mode and charge the energy storage station at the same time. If the new energy station is not in the load reduction operation mode, it means that the power increase margin of the new energy station is very small, and the energy storage station is controlled to stop outputting power to maintain the energy storage performance of the energy storage station.

[0206] In some embodiments, the energy storage power station is further used to control the inertia and frequency regulation processing of the energy storage power station when the grid frequency change is less than the first dead zone value and the charge and discharge state is that the SOC of the energy storage power station is normal or greater than the maximum operating set value.

[0207] The maximum operating set value refers to the maximum state of charge (SOC) of the energy storage station, and its specific value can be set based on actual technical needs. Therefore, if the grid frequency change is greater than the deadband range but less than the first deadband value, it indicates a significant grid frequency change and a decrease in frequency, allowing the generator system to respond. If the energy storage station's SOC is normal or greater than the maximum operating set value, it indicates sufficient energy storage. Therefore, the energy storage station performs power generation inertia and frequency modulation to meet power dispatch requirements.

[0208] In some embodiments, the energy storage power station is further used to control the inertia and frequency regulation processing of the energy storage power station to absorb power when the change in grid frequency is greater than the second dead zone value and the charge and discharge status is that the SOC of the energy storage power station is normal or less than the minimum operating set value.

[0209] Therefore, when the grid frequency change is greater than the dead zone range and greater than the second dead zone value, it means that the grid frequency change is large and the grid frequency increases. The generator system can respond, and the charging and discharging status of the energy storage station is that the energy storage station SOC is normal or less than the minimum operating setting value, which means that there is still energy storage space in the energy storage station. Therefore, the inertia of the energy storage station to absorb power and the frequency regulation process are controlled to meet the power dispatching needs.

[0210] In some embodiments, the energy storage power station is further configured to control the energy storage power station to stop outputting power when the grid frequency change is greater than a second dead zone value and the charge and discharge state is such that the SOC of the energy storage power station is greater than a maximum operating set value.

[0211] Therefore, when the grid frequency change is greater than the dead zone range and greater than the second dead zone value, it means that the grid frequency change is large and the grid frequency increases. The generator set system can respond, and the charging and discharging state of the energy storage power station is that the energy storage power station SOC is greater than the maximum operating setting value. The energy storage station has sufficient energy storage. By controlling the new energy station to enter the load reduction operation mode, the overall power of the generator set system is reduced.

[0212] In some embodiments, the new energy station is used to increase the power of the new energy unit when the change in grid frequency is less than the first dead zone value and the charge and discharge state is that the SOC of the energy storage power station is less than the minimum operating set value, if the new energy station is in a load reduction operation mode.

[0213] Therefore, when the grid frequency change is greater than the dead zone range and less than the first dead zone value, it means that the grid frequency change is large and the grid frequency becomes smaller, and the generator set system can respond, while the charge and discharge status is that the SOC of the energy storage power station is less than the minimum operating setting value, which means that the energy storage power station has insufficient energy storage. Therefore, when the new energy station is in the load reduction operation mode, it means that the new energy station still has a power increase margin. Therefore, by increasing the power of the new energy unit, the overall power of the generator set system can be increased to meet the system requirements.

[0214] In some embodiments, when the grid frequency change is less than the first dead zone value and the charge and discharge state is such that the SOC of the energy storage power station is less than the minimum operating setting value, if the new energy station is not in the load reduction operation mode, the new energy station is controlled to be in the maximum power point tracking (MPPT) mode.

[0215] Maximum power point tracking (MPPT) is the ability to detect the generated voltage in real time and track the highest voltage and current values, enabling the system to generate electricity at the highest efficiency. The minimum operating setting value is the minimum state of charge for the energy storage plant, and its specific value can be set based on actual technical needs.

[0216] Therefore, when the grid frequency change is greater than the dead zone range and less than the first dead zone value, it means that the grid frequency change is large and the grid frequency becomes smaller, and the generator set system can respond. The charge and discharge status is that the SOC of the energy storage power station is less than the minimum operating setting value, which means that the energy storage power station has insufficient energy storage, and the new energy station is not in the load reduction operation mode. Therefore, the new energy station is controlled to be in the maximum power tracking mode to capture new energy resources to the greatest extent, so that the overall power of the generator set system is increased.

[0217] In some embodiments, the new energy station controls the new energy unit to be in maximum power tracking mode when the grid frequency change is less than the first dead zone value and the charge and discharge status is that the energy storage power station SOC is normal or greater than the maximum operating set value.

[0218] The maximum operating set value refers to the maximum state of charge of the energy storage station, and its specific value can be set based on actual technical needs. Therefore, if the grid frequency change is greater than the dead band range and less than the first dead band value, it indicates that the grid frequency has changed significantly and is decreasing, and the generator system can respond. If the charge and discharge status of the energy storage station is normal or greater than the maximum operating set value, it indicates that the energy storage station has sufficient energy storage. Therefore, the new energy station is controlled in maximum power tracking mode to maximize the capture of new energy resources, thereby increasing the overall power of the generator system.

[0219] In some embodiments, the new energy station controls the new energy unit to be in maximum power tracking mode when the grid frequency change is greater than the second dead zone value and the charge and discharge status is that the energy storage power station SOC is normal or less than the minimum operating setting value.

[0220] Therefore, the grid frequency change is greater than the dead zone range and greater than the second dead zone value, indicating that the grid frequency change is large and the grid frequency increases. The generator system can respond, and the charging and discharging status of the energy storage power station is that the energy storage power station SOC is normal or less than the minimum operating setting value, indicating that the energy storage power station still has energy storage space. Therefore, the new energy station is controlled to be in maximum power tracking mode to capture new energy resources to the greatest extent, so that the overall power of the generator system is reduced.

[0221] In some embodiments, the new energy station controls the new energy station to enter a load reduction operation mode when the grid frequency change is greater than the second dead zone value and the charge and discharge state is such that the SOC of the energy storage power station is greater than the maximum operating setting value.

[0222] Therefore, when the grid frequency change is greater than the dead zone range and greater than the second dead zone value, it means that the grid frequency change is large and the grid frequency increases. The generator set system can respond, and the charging and discharging state of the energy storage power station is that the energy storage power station SOC is greater than the maximum operating setting value. The energy storage station has sufficient energy storage. By controlling the new energy station to enter the load reduction operation mode, the overall power of the generator set system is reduced.

[0223] In some embodiments, as shown in FIG3 , an energy storage station includes a connected energy storage valve 201 and a converter valve 202. Thus, by configuring an energy storage station including the energy storage valve and the converter valve, the energy storage valve and the converter valve cooperate to achieve energy storage and power supply applications.

[0224] An energy storage valve refers to an energy storage device that can achieve energy storage or power output through valve control. Referring to Figure 4, the energy storage valve 201 in some embodiments includes multiple energy storage submodules connected in series. These energy storage submodules can be half-bridge energy storage submodules or full-bridge energy storage submodules. Each energy storage submodule includes a connected battery module and a power module. By controlling the switching state of the power module to control the switching state of the battery module, the constant DC voltage control or constant current control of the DC direct-mounted energy storage valve is completed. Among them, after the multiple energy storage submodules are connected in series, one end is connected to the positive DC bus through the energy storage device reactor, starting resistor and isolation knife switch, and the other end is connected to the negative DC bus.

[0225] A converter valve, also known as a converter, can perform rectification and inversion functions. Optionally, it can also control active and reactive power output. In some embodiments, converter valve 202 can be a voltage source converter (VSC) valve, enabling flexible four-quadrant operation.

[0226] In the case where the energy storage station includes energy storage valve 201 and converter valve 202, in some embodiments, controlling the energy storage station to stop outputting power may specifically involve deactivating energy storage valve 201 of the energy storage station. Thus, deactivating energy storage valve 201 can cause the energy storage station to stop generating power, ensuring accurate control of the energy storage station's power outage.

[0227] Taking the converter valve 202 as VSC as an example, the principle diagram of the topological structure of the VSC valve 202 of the energy storage power station connected to the grid is shown in Figure 5. As shown in Figure 5, the VSC valve 202 is connected to the grid end, and the grid end voltage is Vg During the connection process, there will be an internal impedance X inside the converter valve. f , so the voltage at the outlet of the converter valve is V t , and the phase angle is θ, and on the line connected to the grid, there will be a line reactance X g and line resistance R g Since the internal impedance of the converter valve is X f , line reactance X g And the line resistance R g The voltage at the outlet of the converter valve is V t There will be a difference with the grid terminal voltage V.

[0228] The logic of the VSC valve 202 to implement active / reactive output control can be set in combination with actual technical needs. In some embodiments, the principle diagram of the active / reactive output control of the VSC valve 202 is shown in Figure 6. Referring to Figure 6, after generating a voltage instruction, the VSC valve 202 also performs overcurrent suppression processing on the voltage instruction to obtain a current instruction after overcurrent suppression, and then generates a voltage control signal based on the current instruction, and executes a control action corresponding to the voltage control signal.

[0229] 6 , the logic processing module for active / reactive output control of the VSC valve 202 includes: a voltage command generation module 212, an overcurrent suppression module 222, and a voltage command control module 232 connected in sequence.

[0230] A voltage instruction generating module 212 is used to generate a voltage instruction;

[0231] An overcurrent suppression module 222 is used to perform overcurrent suppression processing on the voltage command to obtain a current command after overcurrent suppression;

[0232] The voltage command control module 223 is configured to generate a voltage control signal based on the current command and execute a control action corresponding to the voltage control signal.

[0233] Among them, the voltage instruction generated by the voltage instruction generation module 212 is a voltage instruction generated based on the scheduling of the power grid and the power grid status. It is a control instruction generated based on the power grid status, but control based on this instruction may cause overcurrent. Therefore, after the overcurrent suppression processing is performed by the overcurrent suppression module 222, a current instruction is generated, and then a voltage control signal is generated based on the current instruction to complete the corresponding control action.

[0234] Therefore, after the VSC valve generates a voltage command, it performs overcurrent suppression on the voltage command and then executes an action corresponding to the voltage command after overcurrent suppression, thereby improving the safety of the generator set system.

[0235] In some embodiments, referring to FIG7 and FIG8 , the voltage instruction generation module 212 includes: a virtual synchronous machine module 2121 , a comparison and analysis module 2122 , and an instruction generation module 2123 ;

[0236] The virtual synchronizer module 2121 is used to obtain the active power measurement value and the actual value of the grid voltage and frequency, and perform virtual synchronization processing based on the active power measurement value and the actual value of the voltage and frequency to obtain the frequency difference;

[0237] Comparison and analysis module 2122, configured to obtain reactive power measurement values, PCC (system common coupling point) voltage measurement values, and actual grid voltage amplitude values, and process the reactive power measurement values, PCC voltage measurement values, and actual grid voltage amplitude values ​​to obtain a voltage signal;

[0238] The instruction generation module 2123 is used to generate a voltage instruction based on the frequency difference and the voltage signal.

[0239] Among them, the active power measurement value refers to the actual active power value obtained by measurement, the actual grid voltage frequency value refers to the actual voltage frequency value of the grid obtained by measurement, the reactive power measurement value refers to the actual reactive power value obtained by measurement, the PCC point voltage measurement value refers to the actual PCC point voltage value obtained by measurement, and the actual grid voltage amplitude value refers to the actual grid voltage amplitude obtained by measurement.

[0240] It can be seen that the control mode of the VSC valve of the energy storage power station can be a flexible direct current advanced VSC control mode, in which the active power control adopts a grid-type control based on a virtual synchronous generator (VSG), and is equipped with inertia response, primary frequency regulation and other functions; the reactive power control consists of reactive power control and AC voltage control mode.

[0241] Therefore, by combining the processing of active power measurement values ​​by the virtual synchronous machine with the acquisition of reactive power measurement values, PCC point voltage measurement values, and actual grid voltage amplitude values, the generated voltage instructions can be made more consistent with the actual grid fluctuation conditions, thereby improving grid performance.

[0242] Specifically, referring to FIG7 and FIG8, the comparison analysis module 2122 obtains the reactive power measurement value Q e and reactive power reference value Q set , and based on the reactive power measurement value Q e and reactive power reference value Q set Generate reactive power control signal; obtain PCC point voltage measurement value V t And PCC point voltage reference value Vtset , and based on the PCC point voltage measurement value V t And PCC point voltage reference value V tset Generate voltage control signal; obtain actual value of grid voltage amplitude V g , and based on the actual value of the grid voltage amplitude V g And the voltage amplitude reference value V gset A voltage amplitude control signal is generated; and after selecting one of the reactive power control signal and the voltage control signal, the reactive power control signal and the voltage amplitude control signal are summed, and the summation result is signal converted to obtain a voltage signal.

[0243] As shown in FIG7 and FIG8 , when performing signal conversion, the coefficient of signal conversion can be ω n / Ks, where ω n is the frequency rating, K is the reactive loop integral coefficient, and s is the integral operation coefficient. The voltage signal obtained can be the potential q-axis component eq * .

[0244] In some embodiments, as shown in FIG7 and FIG8 , the virtual synchronizer module 2121 obtains the active power measurement value P when performing virtual synchronization. e and active power reference value P est , and based on the active power measurement value P e and active power reference value P set Generate active power control signal, which is added and subtracted with the feedback signal and the coefficient 1 / Jω n After multiplying s, the voltage amplitude calculation value ω is obtained r , calculate the voltage amplitude ω r and the actual value of the voltage amplitude ω g After performing the operation to obtain the voltage amplitude difference △ω, perform the integration operation to obtain the potential d-axis component ed * Where J is the virtual inertia constant, ω n is the frequency rating, and s is the integral operation coefficient.

[0245] In addition, the voltage amplitude calculation value ω is obtained r Then, the voltage amplitude is calculated as ω r and the grid frequency command value ω set After addition / subtraction, multiply by coefficient D p ω n , thus obtaining the feedback signal. Among them, ω r is the damping coefficient.

[0246] As shown in FIG7 , during the overcurrent suppression process, the potential d-axis component ed is obtained. * and the potential q-axis component eq* Then, the d-axis component of the potential ed * The d-axis component E of the voltage measured at the PCC point d Compare and obtain the first comparison result, multiply the first comparison result by R and ω respectively n L, the potential q-axis component eq * The q-axis component E of the voltage measured at the PCC point q Compare and obtain the second comparison result, and multiply the second comparison result by ω n L and R.

[0247] The product of the first comparison result and R is multiplied by the second comparison result and ω n After summing the products of L, suppression processing is performed, and the coefficient of suppression processing is Get the reference value i of the d-axis current dref , compare the first comparison result with ω n After the difference between the product of L and the product of the second comparison result and R is calculated, the suppression process is performed. The coefficient of the suppression process is Get the reference value i of the q-axis current qref Thus, overcurrent suppression is achieved. Where R and L are the filter resistor and inductor on the AC side of the VSC valve, respectively.

[0248] In some embodiments, as shown in FIG7 , when generating a voltage command, a reference value i of the d-axis current is obtained. dref and the reference i of the q-axis current qref , the reference value of the d-axis current i dref The actual value of the d-axis component of the current at the PCC point i d The difference is calculated and the difference is transferred through the PI regulator to the actual value i of the q-axis component of the current at the PCC point. q with -ω n The sum of the products of L and d-axis component e of the output potential of the converter is obtained. d . Set the reference value of the q-axis current i qref The actual value of the q-axis component of the current at the PCC point i q The difference is calculated and the difference is transferred through the PI regulator to the actual value i of the d-axis component of the current at the PCC point. d With ω n The sum of the products of L and q-axis component e of the output potential of the converter is obtained. q In the figure, G icd (s) is the transfer function of the PI regulator used to control the active component of the grid current, G icq (s) is the transfer function of the component-free PI regulator used to control the grid current. When outputting, δ is the VSG output phase angle.

[0249] Among them, by adjusting the virtual inertia constant J and damping coefficient D p It enables virtual inertia support, damping control, and frequency regulation. In reactive power control, switching between AC voltage control mode and reactive power control mode allows for flexible voltage / reactive power support tailored to grid needs. Thanks to its grid-connected energy storage power station, the designed zero-carbon super generator set also features black start and island operation.

[0250] In some embodiments, the energy storage power station includes an AC direct-hung energy storage valve.

[0251] The AC direct-hook energy storage valve can directly couple the AC terminal to the voltage coupling device, reducing the need for a separate DC / AC converter, and controlling the charge and discharge of the energy storage sub-module in an AC direct-hook manner. Furthermore, high-voltage, large-capacity energy storage can be achieved through the cascading of energy storage sub-modules.

[0252] Figure 9 shows an example of an AC direct-mount energy storage valve. Figures 9a and 9b illustrate two different scenarios. As shown in Figure 9, each phase (a, b, and c) of the AC direct-mount energy storage valve includes multiple cascaded energy storage submodules SM (SM#1, SM#2, ..., SM#n), enabling AC / DC power conversion and energy storage.

[0253] Based on the generator set system described above, it can be used as a zero-carbon generator set to provide electric energy to the power grid. Specifically, the new energy electric energy generated by the new energy station 100 is provided to the voltage coupling device 300, and then coupled by the voltage coupling device 300 and stored in the energy storage power station 200. When it is necessary to provide electric energy to the power grid, the electric energy stored in the energy storage power station 200 can be provided to the voltage coupling device 300, and then coupled by the voltage coupling device 300 and provided to the AC bus. In the case where the energy storage power station 200 has insufficient energy storage, the new energy electric energy generated by the new energy station 100 can also be provided to the voltage coupling device 300, and the voltage coupling device 300 couples the new energy electric energy transmitted by the new energy station 100 and provides it to the AC bus.

[0254] During a primary frequency modulation process, if the energy storage station 200 has sufficient energy storage, only the energy storage station 200 can participate in the primary frequency modulation process, thereby reducing the possibility of power loss when the new energy station 100 participates in the primary frequency modulation. If the energy storage station 200 has insufficient energy storage, only the new energy station 100 can participate in the primary frequency modulation process to meet the grid frequency modulation requirements and maintain grid stability. The energy storage station 200 can participate in the frequency modulation process simultaneously or not, thereby maintaining the performance of the energy storage station 200 while maintaining grid stability.

[0255] Based on the implementation method of the generator set system as described above, it can provide functions such as active inertia response, frequency regulation, damping control, voltage / reactive power support, black start, smoothing of new energy output fluctuations, island operation, and four-quadrant operation. In addition, the new energy storage power station adopts grid-type control, which can provide active support for the system, enhance the stability of the power system, and improve the level of new energy consumption.

[0256] The present application also provides a method for controlling a generator set system. The generator set system includes a new energy station and an energy storage power station, which are connected to the AC busbar via a voltage coupling device. The method for controlling the generator set system can be accomplished through the interaction between the new energy station, the energy storage power station, and the voltage coupling device, or it can be executed by the control device in the above-described embodiment. Referring to FIG. 10 , the method for controlling the generator set system in some embodiments includes:

[0257] Step S101: receiving a dispatch instruction, and determining whether the generator system participates in a frequency regulation based on the dispatch instruction;

[0258] Step S102: when it is determined that the generator system participates in a primary frequency regulation, obtaining a grid frequency measurement value;

[0259] Step S103: Control the operating state of the new energy station and / or energy storage power station based on the grid frequency measurement value.

[0260] Based on the control method of the generator set system provided in the embodiment of the present application, the generator set system includes a new energy station and an energy storage power station. The new energy station and the energy storage power station are connected to the AC bus through a voltage coupling device. Therefore, the internal components of the generator set system, such as the new energy station and the energy storage power station, can be coupled through the voltage coupling device to form a power generation unit, which appears to the outside as a zero-carbon generator set. During the control process, the power grid can dispatch the generator set system. After receiving the dispatching instruction, it determines whether the generator set system should participate in a frequency regulation based on the dispatching instruction. If it needs to participate in a frequency regulation, the working status of the new energy station and / or the energy storage power station is controlled in combination with the grid frequency measurement value, thereby realizing the scheduling of the grid, meeting the needs of the grid scheduling, and being able to match the grid frequency measurement value to realize a scheduling process that matches the grid status.

[0261] According to some embodiments of the present application, with reference to FIG11 , step S103 includes:

[0262] Step S113: determining the grid frequency variation based on the grid frequency measurement value.

[0263] Step S123: Control the operating status of the new energy station and / or energy storage power station based on the change in grid frequency.

[0264] Therefore, after obtaining the grid frequency measurement value, the grid frequency change is determined based on the grid frequency measurement value, and the working status of the new energy station and / or energy storage power station is controlled based on the grid frequency change, so as to match the change of the grid frequency and realize a scheduling process that matches the grid status.

[0265] According to some embodiments of the present application, as shown in FIG12 , controlling the operating state of the new energy station and / or energy storage power station based on the grid frequency variation in step S123 includes:

[0266] Step S1231: Obtain the SOC status of the energy storage power station;

[0267] Step S1232: Based on the frequency change of the power grid and the SOC status of the energy storage power station, the operating status of the new energy station and / or the energy storage power station is controlled.

[0268] According to some embodiments of the present application, step S1232 of controlling the operating state of the new energy station and / or the energy storage power station based on the grid frequency change and the SOC state of the energy storage power station includes:

[0269] When the grid frequency change is less than the first dead zone value, and the charge and discharge status is such that the SOC of the energy storage power station is less than the minimum operating setting value, if the new energy station is in the load reduction operation mode, the power of the new energy station is increased; if the new energy station is not in the load reduction operation mode, the new energy station is controlled to be in the maximum power tracking mode.

[0270] According to some embodiments of the present application, step S1232 of controlling the operating state of the new energy station and / or the energy storage power station based on the grid frequency change and the SOC state of the energy storage power station includes:

[0271] When the grid frequency change is less than the first dead zone value, and the charge and discharge status of the energy storage power station is such that the SOC of the energy storage power station is less than the minimum operating setting value, if the new energy station is in the load reduction operation mode, the energy storage power station is controlled to enter the charging mode; if the new energy station is not in the load reduction operation mode, the energy storage power station is controlled to stop outputting power.

[0272] According to some embodiments of the present application, step S1232 of controlling the operating state of the new energy station and / or the energy storage power station based on the grid frequency change and the SOC state of the energy storage power station includes:

[0273] When the grid frequency change is less than the first dead zone value and the charge and discharge status is that the SOC of the energy storage power station is normal or greater than the maximum operating set value, the new energy station is controlled to be in maximum power tracking mode.

[0274] According to some embodiments of the present application, step S1232 of controlling the operating state of the new energy station and / or the energy storage power station based on the grid frequency change and the SOC state of the energy storage power station includes:

[0275] When the grid frequency variation is less than the first dead zone value and the charge and discharge state is that the SOC of the energy storage power station is normal or greater than the maximum operating setting value, the energy storage power station is controlled to perform the inertia and frequency regulation processing of the power generation.

[0276] According to some embodiments of the present application, step S1232 of controlling the operating state of the new energy station and / or the energy storage power station based on the grid frequency change and the SOC state of the energy storage power station includes:

[0277] When the grid frequency change is greater than the second dead zone value and the charge and discharge status is that the SOC of the energy storage power station is normal or less than the minimum operating setting value, the new energy station is controlled to be in maximum power tracking mode.

[0278] According to some embodiments of the present application, step S1232 of controlling the operating state of the new energy station and / or the energy storage power station based on the grid frequency change and the SOC state of the energy storage power station includes:

[0279] When the grid frequency variation is greater than the second dead zone value and the charge and discharge state is that the SOC of the energy storage power station is normal or less than the minimum operating setting value, the energy storage power station is controlled to perform the inertia and frequency regulation process of absorbing power.

[0280] According to some embodiments of the present application, step S1232 of controlling the operating state of the new energy station and / or the energy storage power station based on the grid frequency change and the SOC state of the energy storage power station includes:

[0281] When the grid frequency change is greater than the second dead zone value and the charge and discharge state is such that the SOC of the energy storage power station is greater than the maximum operating set value, the new energy station is controlled to enter the load reduction operation mode.

[0282] According to some embodiments of the present application, step S1232 of controlling the operating state of the new energy station and / or the energy storage power station based on the grid frequency change and the SOC state of the energy storage power station includes:

[0283] When the grid frequency variation is greater than the second dead zone value and the charge and discharge state is such that the SOC of the energy storage power station is greater than the maximum operating set value, the energy storage power station is controlled to stop outputting power.

[0284] In some embodiments, controlling the energy storage power station to stop outputting power may include:

[0285] Control the energy storage valve of the energy storage power station to exit operation.

[0286] Among them, after the energy storage valve of the energy storage power station is controlled to exit operation, the DC voltage control method and the constant reactive power / AC voltage control method can be further adopted to perform energy storage control.

[0287] In the process of controlling the operating state of the energy storage power station based on the grid frequency variation and the SOC state of the energy storage power station, the energy storage power station can, after generating a voltage command, perform overcurrent suppression on the voltage command, obtain a current command after overcurrent suppression, generate a voltage control signal based on the current command, and execute a control action corresponding to the voltage control signal.

[0288] Referring to FIG. 13 , in one embodiment, the control process of the generator set system may be as follows.

[0289] Obtain a dispatch instruction, which may be a dispatch instruction input by the system, and determine whether the zero-carbon super generator set participates in the system primary frequency regulation according to the dispatch instruction.

[0290] If the zero-carbon super generator set does not need to participate in the system's primary frequency regulation, it will not respond, that is, the zero-carbon super generator set does not respond to the system's dynamic process.

[0291] If the zero-carbon super generator set needs to participate in the system's primary frequency regulation, the grid frequency change Δf is obtained. The grid frequency change Δf can be obtained simultaneously with the receipt of the dispatch instruction, or when it is determined that participation in the system's primary frequency regulation is required.

[0292] If the grid frequency change △f is within the dead zone range, that is, greater than the above-mentioned first dead zone value and less than the above-mentioned second dead zone value, it means that the grid frequency change is within an acceptable range and no response is made, that is, the zero-carbon super generator set does not respond to the system dynamic process.

[0293] If the grid frequency change △f is outside the dead zone, the zero-carbon generator set will enter the response stage.

[0294] If the grid frequency change △f is greater than 0, the SOC of the energy storage power station is obtained:

[0295] If the SOC is normal or too small (e.g., less than the minimum operating setting), the energy storage power station is controlled to participate in inertia response and primary frequency regulation, absorbing power from the system. The new energy unit operates in MPPT mode, and the zero-carbon generator set as a whole is in a power reduction state.

[0296] If the SOC is too large (such as greater than the maximum operating setting value), the energy storage power station will no longer output power, the new energy unit will operate in a load-reduced mode, and the overall power of the zero-carbon generator set will be reduced.

[0297] If the grid frequency change △f is less than 0, obtain the energy storage power station SOC:

[0298] If the SOC is normal or too large, the energy storage power station participates in inertia response and primary frequency regulation to send power to the system, while the new energy unit operates in MPPT mode, and the zero-carbon power generation unit as a whole shows an increase in power.

[0299] If the SOC is too small, determine whether the new energy unit is in load reduction operation or MPPT operation mode:

[0300] If the new energy unit is in a reduced-load operation state and still has room for increased power, the energy storage power station will enter charging mode to restore the SOC, while the new energy unit will increase power, part of which is used to charge the battery and part is used for system support. At this time, the zero-carbon generator set will increase power overall.

[0301] If the new energy unit is in the MPPT operation mode, the energy storage power station will no longer output power, the DC energy storage valve will exit operation, and the VSC valve of the energy storage power station will adopt DC voltage control and constant reactive power / AC voltage control to act as SVG (Static Var Generator) function. The new energy unit will operate in the MPPT mode, and the overall output power of the zero-carbon generator set will remain unchanged.

[0302] Based on the methods described in the embodiments above, the output of the energy storage station and the new energy station can be regulated in stages based on the charging and discharging status of the energy storage station. When the SOC is within the normal range, the energy storage station provides grid-forming services such as inertia support and primary frequency regulation, while the new energy station operates in MPPT mode. When the SOC exceeds the set deadband, the new energy station is controlled to exit MPPT mode and switch to load reduction mode. When the SOC is less than the minimum operating set value, the DC energy storage valve is deactivated. The new energy storage station can implement functions such as SVG and STATACOM (reactive power compensation), realizing a coordinated control strategy for new energy and energy storage within the zero-carbon super generator set.

[0303] In some embodiments, according to the control method of the generator set system as described above, under normal operation (most operating conditions), the new energy generator set operates in MPPT mode, serving as the basic constant output part of the zero-carbon super generator set, and the overall zero-carbon super generator set can participate in dynamic processes such as system inertia response, primary frequency regulation, voltage / reactive power support, etc., and its active support capability is mainly achieved by the new DC direct-connected energy storage power station. In the case of abnormal SOC, the energy storage battery is protected by adjusting the output of new energy or adjusting the commissioning status of the DC energy storage valve of the energy storage power station. The control method of the generator set system reasonably balances the system stability requirements and the economic operation requirements of the zero-carbon generator set. Through the SOC information of the energy storage power station, the output of the new energy generator set and the energy storage power station are regulated in stages. Under the premise of ensuring the active support requirements of the system, the MPPT energy capture of the new energy is guaranteed to the greatest extent to prevent excessive charging and discharging of the battery.

[0304] Among them, the relevant technical features in the embodiment of the control method of the generator set system can be the same as those in the above-mentioned generator set system. Therefore, the specific limitations in the control method embodiments of one or more generator set systems provided above can refer to the above limitations on the generator set system and will not be repeated here.

[0305] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0306] Based on the same inventive concept, embodiments of the present application further provide a generator set system control device for implementing the generator set system control method described above. The solution provided by this device is similar to the solution described in the method described above. Therefore, the specific limitations of one or more generator set system control device embodiments provided below can be found in the limitations of the generator set system control method described above and will not be further elaborated here.

[0307] The present application also provides a control device for a generator set system, wherein the generator set system includes a new energy station and an energy storage power station, the new energy station and the energy storage power station being connected to an AC busbar via a voltage coupling device, and the control device for the generator set system is provided in the control device in the above-described embodiment. Referring to FIG. 14 , the control device for the generator set system in some embodiments includes:

[0308] The dispatch instruction determination module 131 is used to obtain the dispatch instruction and determine whether the generator system participates in the primary frequency regulation based on the dispatch instruction;

[0309] The measurement value acquisition module 132 is used to obtain the grid frequency measurement value when it is determined that the generator set system participates in the primary frequency regulation;

[0310] The control module 133 is used to control the operating state of the new energy station and / or the energy storage power station based on the grid frequency measurement value.

[0311] In some embodiments, the control module 133 is configured to determine a grid frequency change based on a grid frequency measurement value; and control an operating state of a new energy station and / or an energy storage station based on the grid frequency change.

[0312] In some embodiments, the control module 133 is used to obtain the SOC status of the energy storage power station; and control the working status of the new energy station and / or the energy storage power station based on the grid frequency change and the SOC status of the energy storage power station.

[0313] In some embodiments, the control module 133 is used to increase the power of the new energy station if it is in a load reduction operation mode when the change in grid frequency is less than the first dead zone value and the charge and discharge state is that the SOC of the energy storage power station is less than the minimum operating set value; if the new energy station is not in the load reduction operation mode, control the new energy station to be in a maximum power tracking mode.

[0314] In some embodiments, the control module 133 is configured to control the energy storage station to enter a charging mode if the new energy station is in a load reduction operation mode, and to control the energy storage station to stop outputting power if the new energy station is not in a load reduction operation mode, when the grid frequency change is less than a first dead zone value and the charge and discharge state of the energy storage station is such that the SOC of the energy storage station is less than a minimum operating set value.

[0315] In some embodiments, the control module 133 is used to control the new energy station to be in maximum power tracking mode when the grid frequency change is less than the first dead zone value and the charge and discharge status is that the SOC of the energy storage power station is normal or greater than the maximum operating setting value.

[0316] In some embodiments, the control module 133 is used to control the inertia and frequency regulation processing of the energy storage power station when the grid frequency change is less than the first dead zone value and the charge and discharge state is that the SOC of the energy storage power station is normal or greater than the maximum operating setting value.

[0317] In some embodiments, the control module 133 is used to control the new energy station to be in maximum power tracking mode when the grid frequency change is greater than the second dead zone value and the charging and discharging status is that the SOC of the energy storage power station is normal or less than the minimum operating setting value.

[0318] In some embodiments, the control module 133 is used to control the energy storage power station to perform the inertia and frequency regulation processing of power absorption when the grid frequency change is greater than the second dead zone value and the charge and discharge status is that the SOC of the energy storage power station is normal or less than the minimum operating setting value.

[0319] In some embodiments, the control module 133 is used to control the new energy station to enter the load reduction operation mode when the grid frequency change is greater than the second dead zone value and the charge and discharge state is that the SOC of the energy storage power station is greater than the maximum operating setting value.

[0320] In some embodiments, the control module 133 is configured to control the energy storage power station to stop outputting power when the grid frequency variation is greater than the second dead zone value and the charge and discharge state is such that the SOC of the energy storage power station is greater than the maximum operating setting value.

[0321] Each module in the control device of the generator set system described above may be implemented in whole or in part through software, hardware, or a combination thereof. Each module may be embedded in or independent of a processor in an electronic device in hardware form, or may be stored in a memory in the electronic device in software form, so that the processor can call and execute the corresponding operations of each module.

[0322] In one embodiment, an electronic device is provided, which may be a terminal, and its internal structure diagram may be shown in FIG15 . The electronic device includes a processor, a memory, a communication interface, and an input device connected via a system bus. The processor of the electronic device is used to provide computing and control capabilities. The memory of the electronic device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the electronic device is used to communicate with an external device in a wired or wireless manner, for example, it can communicate with the new energy station 100 and / or the energy storage power station 200. The wireless manner can be implemented through WIFI, an operator network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a control method for a generator set system is implemented. The input device of the electronic device may be a touch layer covering the display screen, or a key, trackball or touchpad provided on the electronic device housing, or an external keyboard, touchpad or mouse.

[0323] Those skilled in the art will understand that the structure shown in Figure 15 is merely a block diagram of a partial structure related to the scheme of the present application, and does not constitute a limitation on the electronic device to which the scheme of the present application is applied. The specific electronic device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0324] In one embodiment, an electronic device is provided, including a memory and a processor. The memory stores a computer program, and the processor implements the steps of the method for controlling a generator set system in any of the embodiments described above when executing the computer program.

[0325] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method for controlling a generator set system in any of the embodiments described above are implemented.

[0326] In one embodiment, a computer program product or computer program is provided, comprising computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the steps of the method for controlling a generator set system according to any of the above embodiments.

[0327] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application may include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory or optical memory, etc. Volatile memory may include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0328] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A generator system, wherein: The generator set system includes: a new energy station, an energy storage power station and a voltage coupling device; The new energy station is connected to the first side of the voltage coupling device, the energy storage power station is connected to the second side of the voltage coupling device, and the third side of the voltage coupling device is connected to the AC bus; The new energy station is used to convert new energy into electrical energy and output electrical energy; The energy storage power station is used to store electric energy and output electric energy when enabled; The voltage coupling device is used to store at least part of the electric energy output by the new energy station in the energy storage power station, and to transmit at least part of the electric energy output by the new energy station and / or enable the electric energy output by the energy storage power station to the AC bus.

2. The system of claim 1, wherein: The new energy station has an output end for outputting the first electric energy; The energy storage power station has a charging and discharging interface for receiving and storing surplus electric energy from the new energy station; The voltage coupling device is connected between the output end of the new energy station and the charging and discharging interface of the energy storage power station. When the first electric energy is greater than the target electric energy, the voltage coupling device is used to output the target electric energy in the first electric energy to the AC bus, and store the part of the first electric energy minus the target electric energy as the surplus electric energy; When the first electric energy is equal to the target electric energy, outputting the target electric energy in the first electric energy to the AC bus; When the first electric energy is less than the target electric energy, the energy storage power station is enabled to output the second electric energy, so as to generate the target electric energy according to the first electric energy and the second electric energy, and output the target electric energy to the AC bus.

3. The system of claim 1, wherein: The new energy station has an output end for outputting the first electric energy; The energy storage power station has a charging and discharging interface for receiving and storing electric energy output from the new energy station; The voltage coupling device is connected between the output end of the new energy station and the charging and discharging interface of the energy storage power station; The voltage coupling device is used to enable the energy storage power station to output a second electric energy when the SOC of the energy storage power station is greater than or equal to a preset SOC, so as to generate target electric energy according to the second electric energy, and output the target electric energy to the AC bus; When the SOC of the energy storage power station is less than the preset SOC, the target electric energy in the first electric energy is boosted and output to the AC bus.

4. The system according to claim 3, wherein: The voltage coupling device is further used to store a portion of the first electric energy minus the target electric energy in the energy storage power station when the SOC of the energy storage power station is less than the preset SOC and the first electric energy is greater than the target electric energy.

5. The system according to any one of claims 1 to 4, wherein: The system also includes a detection device and a control device; The detection device is used to detect the station status of the new energy station and the energy storage status of the energy storage power station; The control device is used to receive a dispatch instruction, and control the working state of the new energy station, the energy storage device and the power coupling device according to the dispatch instruction and the station state and the energy storage state detected by the detection module.

6. The generator set system according to any one of claims 1 to 5, wherein: The voltage coupling device comprises a three-winding transformer.

7. The generator set system according to any one of claims 1 to 5, wherein: The first side is a medium-pressure side or a low-pressure side, the second side is a medium-pressure side or a low-pressure side, and the third side is a high-pressure side.

8. The generator set system according to any one of claims 1 to 7, wherein: The generator set system comprises a plurality of the new energy stations, and the output ends of the plurality of the new energy stations are all connected to the voltage coupling device.

9. The generator set system according to claim 8, wherein: The generator set system further includes a busbar transformer, The busbar transformer is connected between the output end of the new energy station and the voltage coupling device.

10. The generator set system according to any one of claims 1 to 9, wherein: The difference between the capacity of the energy storage power station and the actual output of the new energy station is within a preset range.

11. The generator set system according to any one of claims 1 to 10, wherein: The energy storage power station comprises an energy storage valve and a converter valve connected to each other.

12. The generator set system according to any one of claims 1 to 11, wherein: The energy storage power station includes an AC direct-mounted energy storage valve.

13. A method for controlling a generator system, wherein: The generator set system includes a new energy station and an energy storage power station, the new energy station and the energy storage power station are connected to an AC bus through a voltage coupling device, and the method includes: receiving a dispatch instruction, and determining whether the generator set system participates in a primary frequency regulation based on the dispatch instruction; In the case where it is determined that the generator set system participates in a primary frequency regulation, obtaining a grid frequency measurement value; The operating state of the new energy station and / or the energy storage power station is controlled based on the grid frequency measurement value.

14. The method according to claim 13, wherein: The controlling the working state of the new energy station and / or the energy storage power station based on the grid frequency measurement value includes: Determining a grid frequency change based on the grid frequency measurement value; The operating state of the new energy station and / or the energy storage power station is controlled based on the change in the grid frequency.

15. The method according to claim 14, wherein: The controlling the working state of the new energy station and / or the energy storage power station based on the power grid frequency change includes: Obtaining the SOC state of the energy storage power station; Based on the grid frequency change and the SOC state of the energy storage power station, the operating state of the new energy station and / or the energy storage power station is controlled.

16. The method according to claim 15, wherein: Based on the power grid frequency change and the SOC state of the energy storage power station, controlling the working state of the new energy station and / or the energy storage power station includes at least one of the following: When the power grid frequency change is less than the first dead zone value, and the charge and discharge state is that the SOC of the energy storage power station is less than the minimum operating setting value, if the new energy station is in the load reduction operation mode, the power of the new energy station is increased; if the new energy station is not in the load reduction operation mode, the new energy station is controlled to be in the maximum power tracking mode; When the power grid frequency variation is less than the first dead zone value, and the charge and discharge state of the energy storage power station is that the energy storage power station SOC is less than the minimum operation setting value, if the new energy station is in the load reduction operation mode, the energy storage power station is controlled to enter the charging mode; if the new energy station is not in the load reduction operation mode, the energy storage power station is controlled to stop outputting power; When the grid frequency change is less than the first dead zone value and the charge and discharge state is that the SOC of the energy storage power station is normal or greater than the maximum operating setting value, the new energy station is controlled to be in the maximum power tracking mode; When the grid frequency variation is less than the first dead zone value and the charge and discharge state is that the SOC of the energy storage power station is normal or greater than the maximum operating setting value, control the energy storage power station to perform the inertia and frequency modulation processing of power generation; When the grid frequency change is greater than the second dead zone value, and the charge and discharge state is that the SOC of the energy storage power station is normal or less than the minimum operating setting value, the new energy station is controlled to be in the maximum power tracking mode; When the grid frequency variation is greater than the second dead zone value and the charge and discharge state is that the SOC of the energy storage power station is normal or less than the minimum operating setting value, control the energy storage power station to perform the inertia and frequency modulation processing process of absorbing power; When the grid frequency change is greater than the second dead zone value, and the charge and discharge state is that the SOC of the energy storage power station is greater than the maximum operation setting value, the new energy station is controlled to enter the load reduction operation mode; When the grid frequency variation is greater than the second dead zone value, and the charge and discharge state is that the SOC of the energy storage power station is greater than the maximum operation setting value, the energy storage power station is controlled to stop outputting power.

17. The method according to claim 16, wherein: The controlling the energy storage power station to stop outputting power includes: Control the energy storage valve of the energy storage power station to exit operation.

18. A control device for a generator system, wherein: The generator set system includes a new energy station and an energy storage power station, the new energy station and the energy storage power station are connected to the AC bus through a voltage coupling device, and the device includes: A dispatch instruction determination module is used to obtain a dispatch instruction and determine the generator system based on the dispatch instruction. Whether to participate in a frequency modulation; A measurement value acquisition module, used to acquire a grid frequency measurement value when it is determined that the generator set system participates in a primary frequency modulation; A control module is used to control the working state of the new energy station and / or the energy storage power station based on the grid frequency measurement value.

19. The control device according to claim 18, wherein: The control module is used to determine the grid frequency change based on the grid frequency measurement value; and control the working state of the new energy station and / or energy storage power station based on the grid frequency change.

20. The control device according to claim 19, wherein: The control module is used to obtain the SOC status of the energy storage power station; based on the change in grid frequency and the SOC status of the energy storage power station, control the working status of the new energy station and / or the energy storage power station.

21. The control device according to claim 20, wherein: Include at least one of the following: The control module is used for, when the frequency change of the power grid is less than the first dead zone value and the charge and discharge state is that the SOC of the energy storage power station is less than the minimum operation setting value, if the new energy station is in the load reduction operation mode, increasing the power of the new energy station, and if the new energy station is not in the load reduction operation mode, controlling the new energy station to be in the maximum power tracking mode; The control module is used to control the energy storage station to enter the charging mode if the new energy station is in the load reduction operation mode, and control the energy storage station to stop outputting power if the change in the power grid frequency is less than the first dead zone value and the charge and discharge state of the energy storage station is that the SOC of the energy storage station is less than the minimum operation setting value; A control module, used to control the new energy station to be in a maximum power tracking mode when the power grid frequency change is less than the first dead zone value and the charge and discharge state is that the SOC of the energy storage power station is normal or greater than the maximum operating setting value; A control module, used to control the inertia and frequency modulation process of the energy storage power station to generate power when the power grid frequency change is less than the first dead zone value and the charge and discharge state is that the SOC of the energy storage power station is normal or greater than the maximum operation setting value; A control module, used to control the new energy station to be in a maximum power tracking mode when the power grid frequency change is greater than the second dead zone value and the charge and discharge state is that the SOC of the energy storage power station is normal or less than the minimum operating setting value; A control module, used to control the inertia and frequency modulation process of the energy storage power station to absorb power when the power grid frequency change is greater than the second dead zone value and the charge and discharge state is that the SOC of the energy storage power station is normal or less than the minimum operating setting value; A control module, used to control the new energy station to enter a load reduction operation mode when the power grid frequency change is greater than the second dead zone value and the charge and discharge state is that the SOC of the energy storage power station is greater than the maximum operation setting value; The control module is used to control the energy storage power station to stop outputting power when the change in the power grid frequency is greater than the second dead zone value and the charge and discharge state is that the SOC of the energy storage power station is greater than the maximum operating setting value.

22. The control device according to claim 21, wherein: The control module controls the energy storage valve of the energy storage power station to exit operation, so as to control the energy storage power station to stop outputting power.

23. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 13 to 16 are implemented.

24. A computer-readable storage medium having a computer program stored thereon, wherein: When the computer program is executed by a processor, the steps of the method according to any one of claims 13 to 16 are implemented.

25. A computer program product comprising a computer program, wherein: When the computer program is executed by a processor, the steps of the method according to any one of claims 13 to 16 are implemented.

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