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

Abstract

The invention relates to a generator set system and a control method thereof, electronic equipment, a computer readable storage medium and a computer program product. The generator set system in some embodiments comprises a new energy station, an energy storage power station and voltage coupling equipment, the new energy station is connected with the first side of the voltage coupling device, the energy storage power station is connected with the second side of the voltage coupling device, and the third side of the voltage coupling device is connected to an alternating current bus. Based on the scheme of the embodiment of the invention, the zero-carbon-level generator set is realized, the topological form is simple, and the universality is high.

Description

Technical Field

[0001] 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

[0002] In order to achieve sustainable and high-quality development of renewable energy, it is urgent to build a new energy system. The large-scale development of new energy represented by wind energy and photovoltaics (hereinafter referred to as wind and photovoltaic power) is the general trend. However, due to the randomness and intermittency of new energy power generation, and with the rapid growth of new energy installed capacity, the power system's own absorption capacity is insufficient, and the phenomenon of abandoning wind and photovoltaic power occurs from time to time. The power system presents a "double high" trend, which affects the stability of the power grid and the scale of new energy. Therefore, how to improve the versatility and universality of new energy such as wind and photovoltaic power has become an urgent problem to be solved. Summary of the invention

[0003] 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.

[0004] 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;

[0005] The new energy station is connected to a first side of the voltage coupling device, the energy storage power station is connected to a second side of the voltage coupling device, and a third end of the voltage coupling device is connected to an AC bus.

[0006] 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, so that the internal components of the generator set system can be coupled through the voltage coupling device to form a power generation unit, which appears to the outside as a generator set. 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 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. Its topology is simple, versatile and universal, which is conducive to realizing intelligent expansion.

[0007] In some embodiments, the voltage coupling device couples the new energy electric energy received by the new energy station on the first side and / or the electric energy provided by the energy storage power station received by the second side, and transmits it to the AC bus through the third side.

[0008] 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.

[0009] In some embodiments, the voltage coupling device also couples the new energy electric energy from the new energy station received by the first side and stores it in the energy storage power station.

[0010] 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.

[0011] In some embodiments, the voltage coupling device comprises a three-winding transformer.

[0012] Through the three-winding transformer, the internal components of the generator set system 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, universal, and easy to implement.

[0013] 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.

[0014] Therefore, for new energy power stations and energy storage power stations of different voltage levels, generator sets can be used to generate electricity.

[0015] In some embodiments, the new energy station includes multiple ones.

[0016] 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 systems.

[0017] In some embodiments, the generator set system further includes a busbar transformer, and after the new energy station is busbarded to a busbar through the busbar transformer, it is connected to the first side of the voltage coupling device through the busbar.

[0018] Therefore, when multiple new energy stations are configured, each new energy station is collected to a busbar through a busbar transformer and then connected to the first side of the voltage coupling device through the busbar to realize the collection of new energy electricity from multiple new energy stations.

[0019] 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.

[0020] 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, and 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 much waste of storage capacity. This can improve the absorption capacity of the new energy electricity generated by the new energy station and realize a low-carbon implementation path that can be intelligently expanded.

[0021] 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.

[0022] Therefore, when the generator system needs to participate in a frequency regulation, the working state of the energy storage power station can be controlled in combination with the frequency change of the power grid, which can alleviate the frequency fluctuation of the power grid and improve the performance of the power grid.

[0023] In some embodiments, the energy storage power station, when the generator set system participates in primary frequency modulation, further sends a charge and discharge status signal to the new energy station;

[0024] The new energy station also obtains the charging and discharging status signal of the energy storage power station, and controls the working state of the new energy station based on the charging and discharging status signal and the power grid frequency change.

[0025] 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 beneficial 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.

[0026] In some embodiments, the energy storage power station includes an energy storage valve and a converter valve.

[0027] 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 is realized through the cooperation of the energy storage valve and the converter valve.

[0028] 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, wherein 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:

[0029] receiving a dispatch instruction, and determining whether the generator set system participates in a primary frequency regulation based on the dispatch instruction;

[0030] In the case where it is determined that the generator set system participates in a primary frequency regulation, obtaining a grid frequency measurement value;

[0031] The operating state of the new energy station and / or the energy storage power station is controlled based on the grid frequency measurement value.

[0032] 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, and the new energy station and the energy storage power station are connected to the AC bus through a voltage coupling device, so that the internal components of the generator set system 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 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 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 is to participate in a frequency modulation based on the dispatching instruction. If it is to participate in a frequency modulation, the working state of the new energy station and / or the energy storage power station is controlled in combination with the power grid frequency measurement value, thereby realizing the dispatch of the power grid, meeting the needs of power grid dispatch, and being able to match the power grid frequency measurement value to realize a dispatching process that matches the power grid state.

[0033] In some embodiments, controlling the working state of the new energy station and / or the energy storage power station based on the grid frequency measurement value includes:

[0034] Determining a grid frequency change based on the grid frequency measurement value;

[0035] 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.

[0036] Therefore, after obtaining the grid frequency measurement value, the grid frequency change is determined based on the grid frequency measurement value, and the working state of the new energy station and / or the 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 state.

[0037] In some embodiments, 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:

[0038] Obtaining the SOC state of the energy storage power station;

[0039] 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.

[0040] Thus, by combining the charging and discharging state of the energy storage power station with the change in grid frequency to control the working state 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 state of the new energy station is matched with the charging and discharging state of the energy storage power station, which is beneficial to maintaining the performance of the new energy station and can improve the absorption capacity of the new energy electric energy generated by the new energy station.

[0041] In some embodiments, based on the 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:

[0042] When the grid frequency change is less than the first dead zone value and the charging and discharging 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.

[0043] Therefore, when the change in the grid frequency is greater than the dead zone range and less than the first dead zone value, it means that the grid frequency has changed significantly and the grid frequency has decreased. The generator set system can respond, and the charge and discharge state 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 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 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. 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.

[0044] In some embodiments, based on the 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:

[0045] When the grid frequency change is less than the first dead zone value, and the charging and discharging state of the energy storage power station is that the energy storage power station SOC 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.

[0046] Therefore, when the change in the grid frequency is greater than the dead zone range and less than the first dead zone value, it means that the grid frequency has changed significantly and the grid frequency has decreased. The generator system can respond, and the charge and discharge state is that the SOC of the energy storage power station is less than the minimum operating setting value, indicating that the energy storage power station does not have sufficient energy storage. 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, and the energy storage station can be charged at the same time through the new energy station, so the energy storage station is controlled to enter the charging mode. When the new energy station is not in the load reduction operation mode, it means that the power increase space of the new energy station is not very sufficient, so the energy storage station is controlled to stop outputting power to maintain the energy storage performance of the energy storage station.

[0047] In some embodiments, based on the 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:

[0048] When the grid frequency change is less than the first dead zone value and the charging and discharging 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 maximum power tracking mode.

[0049] 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 has changed significantly and the grid frequency has decreased. The generator set system can respond, and the charging and discharging status is that the SOC of the energy storage power station is normal or greater than the maximum operating setting value, indicating 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 can be increased.

[0050] In some embodiments, based on the 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:

[0051] 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 modulation processing of power generation.

[0052] 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 changes greatly and the grid frequency decreases, the generator system can respond, and the charging and discharging state is that the SOC of the energy storage power station is normal or greater than the maximum operating setting value, indicating that the energy storage power station has sufficient energy storage. Therefore, the energy storage power station performs the inertia and frequency modulation processing of the power generation to meet the power dispatching needs.

[0053] In some embodiments, based on the 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:

[0054] When the grid frequency change is greater than the second dead zone value and the charging and discharging 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 maximum power tracking mode.

[0055] 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 changes greatly 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 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.

[0056] In some embodiments, based on the 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:

[0057] 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 modulation processing process of absorbing power.

[0058] 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 changes greatly and the grid frequency increases, the generator system can respond, and the charging and discharging state 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 inertia and frequency modulation processing process of the energy storage power station to absorb power is controlled to meet the power dispatching needs.

[0059] In some embodiments, based on the 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:

[0060] 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, the new energy station is controlled to enter a load reduction operation mode.

[0061] 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 changes greatly 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, indicating that the energy storage power station has sufficient energy storage, and the new energy station is controlled to enter the load reduction operation mode to reduce the overall power of the generator set system.

[0062] In some embodiments, based on the 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:

[0063] When the power 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.

[0064] 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 changes greatly 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 charge state 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, the overall power of the generator set system is reduced.

[0065] In some embodiments, controlling the energy storage power station to stop outputting power includes:

[0066] Control the energy storage valve of the energy storage power station to exit operation.

[0067] 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:

[0068] A dispatch instruction determination module, used for obtaining a dispatch instruction and determining whether the generator set system participates in a primary frequency regulation based on the dispatch instruction;

[0069] 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;

[0070] 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.

[0071] 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 one of the embodiments described above when executing the computer program.

[0072] In a fifth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the method in any one of the embodiments described above.

[0073] In a sixth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the method in any one of the embodiments described above.

[0074] 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

[0075] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0076] Figure 1 A schematic diagram of the topological structure of a generator set system according to some embodiments of the present application;

[0077] Figure 2 A schematic diagram of the topological structure of a generator set system according to some other embodiments of the present application;

[0078] Figure 3 A schematic diagram of the topological structure of an energy storage power station in some embodiments of the present application;

[0079] Figure 4 A schematic diagram of the topological structure of a DC direct-mounted energy storage valve in some embodiments of the present application;

[0080] Figure 5 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;

[0081] Figure 6 A schematic diagram of the principle of active / reactive output control of a converter valve in some embodiments of the present application;

[0082] Figure 7 A schematic diagram of the logic principle of active / reactive output control of a converter valve in some specific embodiments of the present application;

[0083] Figure 8A schematic diagram of the logic principle of a voltage instruction generation module in the process of performing active / reactive output control in some embodiments of the present application;

[0084] Fig. 9 A schematic flow chart of a control method of a generator set system in some embodiments of the present application;

[0085] Fig.10 A schematic diagram of a process for controlling the working status of a new energy station and an energy storage power station based on a grid frequency measurement value in some embodiments of the present application;

[0086] Fig.11 A schematic diagram of a process for controlling the working status 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;

[0087] Fig.12 Schematic diagram of a flow chart of a control method of a generator set system in some specific embodiments of the present application;

[0088] Fig.13 A structural block diagram of a control device of a generator set system in some embodiments of the present application;

[0089] Fig.14 This is a diagram of the internal structure of an electronic device according to some embodiments of the present application. DETAILED DESCRIPTION

[0090] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0091] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0092] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field 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" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0093] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0094] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0095] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0096] 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).

[0097] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "connection" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0098] At present, the development of new energy represented by wind power and photovoltaics has become an important goal in building my country's new power system. However, wind power and photovoltaics are easily affected by the weather and show random and intermittent characteristics. And with the rapid growth of new energy installed capacity, the power system's own absorption capacity is insufficient, and the phenomenon of abandoning wind and photovoltaic power such as "abandoning wind" and "abandoning light" often occurs. On the other hand, with the continuous increase in the proportion of new energy connected by power electronics, the new power system presents a weak grid form with low inertia and low short-circuit ratio. It requires new energy to actively support the power system to maintain system stability and improve the absorption of new energy.

[0099] Energy storage, as a flexible control tool, can realize the on-demand transfer of energy over time, and is an important technology and core equipment to adapt to the new energy system. Regarding the current new energy delivery system, how to realize the delivery of new energy, upgrade new energy to high-quality power sources, and achieve the decarbonization and reduction of the energy Internet is an issue that needs to be discussed urgently.

[0100] 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 presented as a generator set. Since the generator set contains the new energy station, that is, the new energy generator set that realizes the 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 low-carbon generator set. The low-carbon generator set can be connected to the power grid and receive the dispatch of the power grid, so as to improve the power grid's ability to absorb new energy. It should be understood that although there are products that may be generated during the operation of the equipment itself, the carbon production during the operation process is much smaller than the carbon production in the power generation process (such as the carbon production in thermal power generation). The two are not in the same order of magnitude. Therefore, the generator set can be considered as a zero-carbon level generator set. In the following embodiments, the generator set is also referred to as a zero-carbon generator set.

[0101] refer to Figure 1 As shown, 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 power station 200 and a voltage coupling device 300, wherein:

[0102] 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.

[0103] Among them, the new energy station 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 may 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 with strong winds but insufficient sunlight, only wind turbines can be equipped. In some areas with low winds but sufficient sunshine, only photovoltaic arrays can be equipped. In some areas with sufficient winds and sufficient sunshine time, wind turbines and photovoltaic arrays can be equipped in the new energy station at the same time. Usually, there will be wind and sunshine time in any area. Therefore, 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.

[0104] An energy storage power station is a mechanism for storing electrical energy. It can store electrical energy and output the stored electrical energy when needed to provide electrical energy to the outside.

[0105] A voltage coupling device is a device that can achieve voltage coupling. It can transfer voltage from one side of the voltage coupling device to the other side to achieve voltage transfer. During the transfer process, the voltage level may not be adjusted, or the voltage level may be adjusted at the same time, such as stepping down or stepping up the transferred voltage. It has high isolation and high safety.

[0106] Based on the generator set system of 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 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, so that the internal components of the generator set system can be coupled through the voltage coupling device to form a power generation unit, which appears to the outside as a generator set. 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 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. Its topology is simple, versatile and universal, which is conducive to realizing intelligent expansion.

[0107] 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 received on the second side, and transmits it to the AC bus through the third side.

[0108] refer to Figure 1 As shown, when electric energy needs to be provided, the new energy station 100 generates new energy electric energy, which is transmitted to the first side 301 of the voltage coupling device 300. The voltage coupling device 300 couples the new energy electric energy and transmits it to the AC bus through the third side 303 to provide electric energy to the power grid. Alternatively, the energy storage power station 200 provides the stored electric energy to the second side 302 of the voltage coupling device 300, which is coupled by the voltage coupling device 300 and transmitted to the AC bus through the third side 303 to provide electric energy to the power grid. In some embodiments, the voltage coupling device 300 may also couple the new energy electric energy provided by the new energy station 100 with the electric energy provided by the energy storage power station and transmit it to the AC bus through the third side 303 to provide electric energy to the power grid.

[0109] 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 it to the AC bus, thereby realizing external power supply.

[0110] In some embodiments, the voltage coupling device also 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.

[0111] refer to Figure 1 As shown, the new energy station 100 generates new energy electric energy, which is transmitted to the first side 301 of the voltage coupling device 300. The voltage coupling device 300 couples the new energy electric energy. After the voltage coupling device 300 couples the new energy electric energy, it is stored in the energy storage power station 200 through the second side 302.

[0112] 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, so as to realize the storage of the new energy electricity generated by the new energy station and supplement the electricity stored in the energy storage power station, thereby improving the power supply capacity of the generator system.

[0113] In some embodiments, the voltage coupling device comprises a three-winding transformer.

[0114] The three-winding transformer has three sides, each side is provided with a transformer coil, so it is called a three-winding transformer. The voltage level of each side is not limited. Usually, the three-winding transformer is a transformer with three voltage levels of 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.

[0115] 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 and 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 the embodiments of the present application do not make specific limitations.

[0116] Therefore, through the three-winding transformer, the internal components of the generator set system 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 universal, and it can realize an intelligently expandable low-carbon implementation path, which is easy to implement.

[0117] 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.

[0118] Therefore, for new energy power stations and energy storage power stations of different voltage levels, generator sets can be used to generate electricity.

[0119] In some embodiments, the new energy station includes multiple ones.

[0120] For example, the first side is the medium pressure side or the low pressure side, the second side is the medium pressure side or the low pressure side, and the third side is the high pressure side. Figure 2 As shown, it is illustrated by taking two new energy stations, each of which is provided with a wind turbine (set in a 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 in each new energy station can be set in combination with actual technical needs, and the embodiment of the present application does not make specific restrictions. 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 actual technical scenarios, it can be applied to large-scale new energy base AC and DC transmission systems, microgrid systems, offshore wind farms, regional power grid interconnection and other scenarios, to achieve a high proportion of new energy consumption, and ideally 100% of new energy consumption can be achieved, which can achieve a low-carbon realization path that can be intelligently expanded.

[0121] In some embodiments, the generator set system also includes a busbar transformer. After the new energy station is connected to the busbar through the busbar transformer, it is connected to the first side of the voltage coupling device through the busbar.

[0122] 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.

[0123] Thus, in the case of configuring multiple new energy stations, after each new energy station is collected to the busbar through the busbar, it is connected to the first side of the voltage coupling device through the busbar to realize the convergence of the new energy electric energy of multiple new energy stations. By configuring multiple new energy stations, each new energy station is collected to the busbar through the busbar, and based on system requirements, the number of new energy stations and the capacity of new energy stations can be personalized, and new energy stations with different capacity configurations can be realized according to requirements, which can meet the design requirements of different generator set systems.

[0124] 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.

[0125] The capacity of the energy storage station refers to the capacity of the electric energy that the energy storage station can store. The actual output of the new energy station refers to the actual power that the new energy station can generate.

[0126] 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, which means 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 electric 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 will not be too much.

[0127] Among them, 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, which can be that the rated storage capacity of the energy storage power station is equal to the actual output of the new energy station, or that the rated storage capacity of the energy storage power station is greater than the actual output of the new energy station, but does not exceed a predetermined percentage of the actual output of the new energy station, and the predetermined percentage can be set in combination with actual technical needs.

[0128] Taking the actual output of 600MW (megawatt) of the new energy station as an example, if it is configured according to 20%-2 hours capacity, a 120MW / 240MWh energy storage station can be configured.

[0129] Thus, by configuring the capacity of the energy storage power station to be within a preset range with respect to the difference between the actual output of the new energy station, the capacity of the energy storage power station is matched with the actual output of the new energy station, thereby achieving a match between the storage capacity and the actual output of new energy, so that the electric energy generated by the new energy station can be stored in the energy storage power station, thereby reducing the situation where the new energy station generates more electric energy but cannot store it, and the energy storage power station will not have too much waste of capacity space, thereby improving the absorption capacity of the new energy electric energy generated by the new energy station, and realizing a low-carbon implementation approach that can be intelligently expanded.

[0130] 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.

[0131] Among them, the maximum capacity of the new energy station is the absolute maximum output of the new energy station, which is the sum of the absolute maximum loads of each component unit of the new energy station. The simultaneous rate is the ratio of the comprehensive maximum load of the new energy station to the absolute maximum loads of each component unit of the new energy station.

[0132] 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.

[0133] 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. The energy storage power station can be configured on this basis to achieve a high degree of matching between the storage capacity of the energy storage power station and the actual output of new energy.

[0134] In some embodiments, the energy storage power station controls the working state of the energy storage power station based on the frequency change of the power grid when the generator set system participates in the primary frequency regulation.

[0135] Primary frequency regulation refers to the automatic control process of limiting the change of the grid frequency and maintaining the grid frequency stable by automatically controlling the increase or decrease of the active power of the units in the grid once the grid frequency deviates from the rated value. It can be determined in various possible ways whether the generator set system needs to participate in the primary frequency regulation, for example, 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 when each generator set participates in the primary frequency regulation. 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, it can also be determined in other ways whether the generator set system needs to participate in the primary frequency regulation, which can be determined based on the dispatch strategy of the power dispatch system. The embodiments of the present application do not limit this.

[0136] The grid frequency change refers to the change in grid frequency, which can be the difference between the grid frequency value of the current scheduling cycle and the grid frequency value of the previous cycle.

[0137] Therefore, when the generator system needs to participate in a frequency regulation, the working state of the energy storage power station can be controlled in combination with the frequency change of the power grid, which can alleviate the frequency fluctuation of the power grid and improve the performance of the power grid.

[0138] 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;

[0139] 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.

[0140] Among them, the charge and discharge state signal is a signal sent by the energy storage power station based on the charge and discharge state (State of Charge, SOC) of the energy storage power station. The charge and discharge state is the state of charge, which reflects the remaining capacity. Therefore, the charge and discharge state of the energy storage power station reflects the remaining capacity of the energy storage power station, such as whether the remaining storage capacity of the energy storage power station is sufficient.

[0141] Among them, 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 based on the charge and discharge status. For example, the first value indicates that the SOC of the energy storage power station is greater than the maximum operating setting value, and the energy storage space of the energy storage power station is relatively sufficient. The second value indicates that the SOC of the energy storage power station is less than the minimum operating setting value, and the energy storage space of the energy storage power station is insufficient, or the energy storage of the energy storage power station is relatively full. It should be understood that the charge and discharge status signal can also be generated by other means, and the embodiments of the present application do not make specific limitations.

[0142] 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, 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 beneficial 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.

[0143] In some embodiments, the energy storage power station is also used to control the energy storage power station to enter the charging mode if the new energy station is in the load reduction operation mode, and to control the energy storage power station to stop outputting power if the new energy station is not in the load reduction operation mode, when the change in the grid frequency is less than the first dead zone value and the charging and discharging state of the energy storage power station is that the SOC of the energy storage power station is less than the minimum operating setting value.

[0144] The dead zone range of the power grid represents the range in which the power grid frequency can fluctuate. By setting the dead zone range, frequency modulation control can be performed when the dead zone range is exceeded, reducing the possibility of frequent frequency modulation control to maintain the stability of the power grid. The first dead zone value refers to 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 the embodiment of the present application.

[0145] Among them, the dead zone range is usually set based on the set value combined with the fluctuation range. For example, it can usually be expressed as Ma±a, then Ma is the first dead zone value, M+a is the second dead zone value, and M and a are both values ​​greater than 0. Among them, if the grid frequency change is less than the first dead zone value, it means that the grid frequency has changed greatly and frequency control is required, and the grid frequency has decreased, so the power needs to be increased. If the grid frequency change is greater than the second dead zone value, it means that the grid frequency has changed greatly and frequency control is required, and the grid frequency has increased, so the power needs to be reduced.

[0146] The load reduction operation mode refers to the mode in which the new energy station operates at a lower power, that is, the new energy station does not operate at full power. The specific load reduction method is not limited. Under the load reduction operation mode, the new energy station still has a power increase margin, that is, the power of the new energy station can be further increased. When it is not necessary to provide electricity at full load, the new energy station can operate in the load reduction operation mode, thereby increasing the service life of the new energy station while meeting the electricity demand.

[0147] Among them, the minimum operating setting value is the minimum charge state that the energy storage power station needs to meet. Its specific value can be set in combination with actual technical needs, and the embodiments of this application do not make specific limitations.

[0148] Among them, controlling the energy storage power station to stop outputting power refers to controlling the energy storage power station to stop emitting electric power, for example, controlling the energy storage power to stop emitting active power, and for another example, controlling the energy storage power station to stop acting as a power supply, etc. In other embodiments, the energy storage power station can also be controlled to stop emitting electric power in other ways.

[0149] Therefore, when the change in grid frequency is greater than the dead zone range and less than the first dead zone value, it means that the grid frequency changes greatly and becomes smaller, and the generator system can respond. The charging and discharging state 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.

[0150] In some embodiments, the energy storage power station is also used to control the inertia and frequency regulation process of the energy storage power station to generate power 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 normal or greater than the maximum operating setting value.

[0151] Among them, the maximum operating setting value refers to the maximum state of charge of the energy storage power station, and its specific value can be set in combination with actual technical needs. Therefore, when the change in the grid frequency is greater than the dead zone range and less than the first dead zone value, it means that the grid frequency has changed significantly and the grid frequency has decreased, and the generator system can respond. 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, indicating that the energy storage power station has sufficient energy storage. Therefore, the energy storage power station performs the inertia and frequency modulation processing of the power generation to meet the power dispatching needs.

[0152] In some embodiments, the energy storage power station is also used to control the inertia and frequency modulation 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 charging and discharging state is that the SOC of the energy storage power station is normal or less than the minimum operating setting value.

[0153] 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 changes greatly and the grid frequency increases, the generator system can respond, and the charging and discharging state 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 inertia and frequency modulation process of the energy storage power station to absorb power is controlled to meet the power dispatching needs.

[0154] In some embodiments, the energy storage power station is also used to control the energy storage power station to stop outputting power when the change in grid frequency 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.

[0155] 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 changes greatly and the grid frequency increases. The generator 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, and the new energy station is controlled to enter the load reduction operation mode to reduce the overall power of the generator system.

[0156] 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 setting value, if the new energy station is in a load reduction operation mode.

[0157] 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 changes greatly and becomes smaller, and the generator system can respond. The charging and discharging state 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 system can be increased to meet the system requirements.

[0158] In some embodiments, at the new energy 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 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.

[0159] Among them, maximum power tracking refers to the ability to detect the power generation voltage in real time and track the highest voltage and current values, so that the system can generate electricity with the highest efficiency. The minimum operating setting value refers to the minimum charge state of the energy storage power station, and its specific value can be set in combination with actual technical needs.

[0160] 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 changes greatly and becomes smaller, and the generator system can respond. The charging and discharging state 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 system can be increased.

[0161] 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 charging and discharging state is that the SOC of the energy storage power station is normal or greater than the maximum operating setting value.

[0162] Among them, the maximum operating setting value refers to the maximum state of charge of the energy storage power station, and its specific value can be set in combination with actual technical needs. Therefore, when the change in the grid frequency is greater than the dead zone range and less than the first dead zone value, it means that the grid frequency has changed significantly and the grid frequency has decreased, and the generator system can respond. 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, indicating that the energy storage power station has sufficient energy storage. 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 system is increased.

[0163] 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 charging and discharging state is that the SOC of the energy storage power station is normal or less than the minimum operating setting value.

[0164] Therefore, when the change in grid frequency is greater than the dead zone range and greater than the second dead zone value, it means that the grid frequency changes greatly 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 can be reduced.

[0165] 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.

[0166] 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 changes greatly and the grid frequency increases. The generator 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, and the new energy station is controlled to enter the load reduction operation mode to reduce the overall power of the generator system.

[0167] In some embodiments, reference Figure 3 As shown, the energy storage power station includes an energy storage valve 201 and a converter valve 202 .

[0168] Therefore, by configuring an energy storage power station including an energy storage valve and a converter valve, the energy storage valve and the converter valve cooperate to realize the application of energy storage and power supply.

[0169] Energy storage valve refers to an energy storage device that can achieve energy storage or power output through valve control. Figure 4 As shown, the energy storage valve 201 in some embodiments includes multiple energy storage submodules connected in series, and 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. The switching state of the power module is controlled to control the switching state of the battery module to complete the constant DC voltage control or constant current control of the DC direct-mounted energy storage valve. Among them, after multiple energy storage submodules are connected in series, one end is connected to the positive DC bus through the energy storage device reactor, the starting resistor and the isolation knife switch, and the other end is connected to the negative DC bus.

[0170] The converter valve is also called a converter, which can realize the functions of rectification and inversion. Optionally, the converter valve can also realize functions such as controlling active / reactive output. In some embodiments, the converter valve 202 can be a VSC (voltage source converter) valve, so that four-quadrant flexible operation can be achieved through the VSC valve.

[0171] Wherein, in the case where the energy storage power station includes the energy storage valve 201 and the converter valve 202, in some embodiments, the above-mentioned control of the energy storage power station to stop outputting power may specifically be to control the energy storage valve 202 of the energy storage power station to stop operating. Thus, the energy storage power station can stop outputting power by stopping the operation of the energy storage valve 202, and the accuracy of the control of the energy storage power station to stop outputting power can be achieved.

[0172] Taking the converter valve 202 as a VSC as an example, the schematic diagram of the topological structure of the VSC valve 202 of the energy storage power station connected to the grid is as follows: Figure 5 As shown. Figure 5 As shown, the VSC valve 202 is connected to the grid terminal, and the grid terminal voltage is V g During the connection process, there will be an internal impedance X inside the converter valve. f , so the voltage at the converter valve outlet 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.

[0173] The logic of the VSC valve 202 to realize active / reactive output control can be set in combination with actual technical needs. In some embodiments, the principle schematic diagram of the VSC valve 202 to realize active / reactive output control is shown in FIG. Figure 6 As shown, reference Figure 6 As shown, after generating the voltage command, the VSC valve 202 also performs overcurrent suppression processing on the voltage command to obtain the current command after overcurrent suppression, and then generates a voltage control signal based on the current command and executes a control action corresponding to the voltage control signal.

[0174] refer to Figure 6 As shown, the logic processing module for the VSC valve 202 to perform active / reactive output control includes: a voltage command generation module 212, an overcurrent suppression module 222 and a voltage command control module 232 connected in sequence.

[0175] A voltage command generating module 212, used to generate a voltage command;

[0176] An overcurrent suppression module 222 is used to perform overcurrent suppression processing on the voltage command to obtain a current command after overcurrent suppression;

[0177] The voltage command control module 223 is used to generate a voltage control signal based on the current command and execute a control action corresponding to the voltage control signal.

[0178] 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 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.

[0179] Therefore, after the VSC valve generates a voltage command, it performs overcurrent suppression processing 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.

[0180] In some embodiments, reference Figure 7 and Figure 8 As shown, the voltage instruction generation module 212 includes: a virtual synchronous machine module 2121, a comparison and analysis module 2122, and a voltage instruction generation module 2123;

[0181] The virtual synchronous machine 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;

[0182] The comparison and analysis module 2122 is used to obtain the reactive power measurement value, the PCC (system common coupling point) point voltage measurement value, and the actual value of the grid voltage amplitude, and process the reactive power measurement value, the PCC point voltage measurement value, and the actual value of the grid voltage amplitude to obtain a voltage signal;

[0183] The voltage command generating module 2123 is used to generate a voltage command based on the frequency difference and the voltage signal.

[0184] Among them, the active power measurement value refers to the actual active power value obtained by measurement, the actual value of the grid voltage frequency 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 value of the grid voltage amplitude refers to the actual grid voltage amplitude obtained by measurement.

[0185] 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 machine (Virtual Synchronous Generator, VSG), and is equipped with inertia response, primary frequency modulation and other functions; the reactive power control consists of reactive power control and AC voltage control mode.

[0186] Therefore, by combining the processing of active power measurement values ​​by the virtual synchronous machine, and combining the acquisition of reactive power measurement values, PCC point voltage measurement values, and actual grid voltage amplitude values, the generated voltage command can be made more consistent with actual grid fluctuations, thereby improving grid performance.

[0187] Specifically, refer to Figure 7 and Figure 8 As shown, the comparison and 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 V tset value, and based on the PCC point voltage measurement value V t and PCC voltage reference value V tset Generate voltage control signal; obtain the actual value V of the grid voltage amplitude g , and based on the actual value of the grid voltage amplitude V g and voltage amplitude reference value V gset A voltage amplitude control signal is generated; and after selecting a reactive power control signal and a voltage control signal, the reactive power control signal and the voltage amplitude control signal are summed, and the summation result is converted into a signal to obtain a voltage signal.

[0188] Among them, Figure 7 and Figure 8 As shown, 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 * .

[0189] In some embodiments, Figure 7 and Figure 8 As shown, the virtual synchronizer module 2121 obtains the active power measurement value P when performing virtual synchronization. e and active power reference value P set, and based on the active power measurement value P e and active power reference value P set Generate an 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 The actual value of the voltage amplitude ω g After performing the operation to obtain the voltage amplitude difference Δω, perform the integration operation to obtain the potential d-axis component ed * . Among them, J is the virtual inertia constant, ω n is the frequency rating, and s is the integral operation coefficient.

[0190] 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.

[0191] Combination Figure 7 As shown, 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.

[0192] The product of the first comparison result and R and 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 The first comparison result is compared with ω n After subtracting the product of L and the product of the second comparison result and R, suppression processing is performed. The coefficient of suppression processing is Get the reference value i of the q-axis current qref . Thus, over-current suppression is achieved. Wherein, R and L are the filter resistor and inductor of the AC side of the VSC valve respectively.

[0193] In some embodiments, Figure 7 As shown, when generating the voltage command, the 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 obtained after being transmitted by the PI regulator and is equal to the actual value i of the q-axis component of the current at the PCC point q With -ω n L is summed to obtain the d-axis component e of the output potential of the converter 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 obtained after being transmitted by the PI regulator and is equal to the actual value i of the d-axis component of the current at the PCC point d With ω n L is summed to obtain the q-axis component e of the output potential of the converter 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.

[0194] Among them, by adjusting the virtual inertia constant J and damping coefficient D p It can realize virtual inertia support, damping control and frequency modulation functions. In reactive control, by switching between AC voltage control mode and reactive power control mode, voltage / reactive power support can be flexibly provided according to grid demand. Thanks to the grid-type energy storage power station, the designed zero-carbon super generator set also has black start function and island operation function.

[0195] Based on the generator set system as described above, it can be used as a zero-carbon power generation generator set to provide electric energy to the power grid. Among them, 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 of insufficient energy storage in the energy storage power station 200, 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.

[0196] In the process of primary frequency modulation, if the energy storage power station 200 has sufficient energy storage, only the energy storage power station 200 can participate in the primary frequency modulation process to reduce the possibility of power loss when the new energy station 100 participates in the primary frequency modulation. In the case of insufficient energy storage of the energy storage power station 200, only the new energy station 100 can participate in the primary frequency modulation to meet the needs of grid frequency modulation and maintain the stability of the grid, while the energy storage power station 200 can participate in the frequency modulation at the same time or not to participate in the frequency modulation to maintain the performance of the energy storage power station 200 while maintaining the stability of the grid.

[0197] Based on the implementation method of the generator set system as described above, it can provide functions such as active inertia response, frequency modulation, damping control, voltage / reactive power support, black start, smoothing of new energy output fluctuations, island operation, and four-quadrant operation. 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.

[0198] The present application also provides a control method for a generator set system. 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 the AC bus through a voltage coupling device. Fig. 9 As shown, the control method of the generator set system in some embodiments includes:

[0199] Step S101: receiving a dispatch instruction, and determining whether a generator system participates in a frequency regulation based on the dispatch instruction;

[0200] Step S102: when it is determined that the generator system participates in a primary frequency regulation, obtaining a grid frequency measurement value;

[0201] Step S103: Control the operating state of the new energy station and / or the energy storage power station based on the grid frequency measurement value.

[0202] 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 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 needs to participate in a frequency regulation based on the dispatching instruction. If it needs to participate in a frequency regulation, the working state of the new energy station and / or the energy storage power station is controlled in combination with the power grid frequency measurement value, thereby realizing the dispatch of the power grid and meeting the needs of the power grid dispatch. It can also match the power grid frequency measurement value to realize the dispatching process that matches the power grid state.

[0203] According to some embodiments of the present application, reference Fig.10 As shown, the above step S103 includes:

[0204] Step S113: determining the grid frequency change based on the grid frequency measurement value.

[0205] Step S123: Control the operating state of the new energy station and / or energy storage power station based on the change in grid frequency.

[0206] Therefore, after obtaining the grid frequency measurement value, the grid frequency change is determined based on the grid frequency measurement value, and the working state 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 state.

[0207] According to some embodiments of the present application, reference Fig.11 As shown, the control of the working state of the new energy station and / or the energy storage power station based on the power grid frequency change in step S123 includes:

[0208] Step S1231: Obtain the SOC state of the energy storage power station;

[0209] Step S1232: Based on the frequency change of the power grid and the SOC state of the energy storage power station, control the working state of the new energy station and / or the energy storage power station.

[0210] According to some embodiments of the present application, step S1232 controls the working 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, including:

[0211] 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 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.

[0212] According to some embodiments of the present application, step S1232 controls the working 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, including:

[0213] When the change in grid frequency is less than the first dead zone value, and the charging and discharging state 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.

[0214] According to some embodiments of the present application, step S1232 controls the working 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, including:

[0215] 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, the new energy station is controlled to be in maximum power tracking mode.

[0216] According to some embodiments of the present application, step S1232 controls the working 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, including:

[0217] 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 modulation processing of power generation.

[0218] According to some embodiments of the present application, step S1232 controls the working 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, including:

[0219] 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.

[0220] According to some embodiments of the present application, step S1232 controls the working 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, including:

[0221] 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 modulation process of absorbing power.

[0222] According to some embodiments of the present application, step S1232 controls the working 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, including:

[0223] 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, the new energy station is controlled to enter the load reduction operation mode.

[0224] According to some embodiments of the present application, step S1232 controls the working 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, including:

[0225] 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, the energy storage power station is controlled to stop outputting power.

[0226] In some embodiments, the above-mentioned controlling the energy storage power station to stop outputting power may include:

[0227] Control the energy storage valve of the energy storage power station to exit operation.

[0228] Among them, after controlling the energy storage valve of the energy storage power station 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.

[0229] Among them, in the process of controlling the working state of the energy storage power station based on the change in grid frequency and the SOC state of the energy storage power station, the energy storage power station can perform overcurrent suppression processing on the voltage command after generating the voltage command, and after obtaining the 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.

[0230] refer to Fig.12 As shown, in a specific embodiment, the control process of the generator set system can be described as follows.

[0231] 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 primary frequency regulation of the system according to the dispatch instruction.

[0232] If the zero-carbon super generator set does not need to participate in the primary frequency regulation of the system, it will not respond, that is, the zero-carbon super generator set does not respond to the dynamic process of the system.

[0233] If the zero-carbon super generator set needs to participate in the primary frequency regulation of the system, the grid frequency change △f is obtained. The grid frequency change △f can be obtained at the same time when the dispatch instruction is received, or when it is determined that it needs to participate in the primary frequency regulation of the system.

[0234] 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.

[0235] If the grid frequency change △f is outside the dead zone, the zero-carbon generator set will enter the response stage.

[0236] Among them, if the grid frequency change △f is greater than 0, the energy storage power station SOC is obtained:

[0237] If the SOC is normal or too small (such as less than the minimum operating setting value), the energy storage power station is controlled to participate in inertia response and primary frequency regulation to absorb power from the system, while the new energy unit operates in MPPT mode, and the zero-carbon generator set is in a power reduction state as a whole;

[0238] 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 reduction mode, and the overall power of the zero-carbon generator set will be reduced.

[0239] If the grid frequency change △f is less than 0, obtain the energy storage power station SOC:

[0240] 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 generator set presents an overall power increase.

[0241] If the SOC is too small, determine whether the new energy unit is in load reduction operation or MPPT operation mode:

[0242] If the new energy unit is in a load-reduced operation state and there is still room for power increase, the energy storage power station will enter the charging mode to restore the SOC, and the new energy unit will increase power, part of which is used to charge the battery and part of which is used for system support. At this time, the zero-carbon generator set will increase power as a whole;

[0243] 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 VarGenerator) function. The new energy unit operates in the MPPT mode, and the overall output power of the zero-carbon generator set remains unchanged.

[0244] Based on the method in the embodiment described above, the output of the energy storage power station and the new energy station can be regulated in stages based on the charging and discharging status of the energy storage power station. When the SOC is in the normal range, the energy storage power station provides inertia support, primary frequency regulation and other network services, while the new energy station operates in MPPT mode; when the SOC is greater than the set dead zone, the new energy is controlled to exit the MPPT mode and switch to the load reduction operation mode; when the SOC is less than the minimum operating setting value, the DC energy storage valve exits operation, and the new energy storage power station can realize SVG, STATACOM (reactive power compensation) and other functions, realizing the coordinated control strategy of new energy and energy storage within the zero-carbon super generator set.

[0245] Furthermore, according to the control method of the generator set system as described above, under normal operation (most operating conditions), the new energy unit operates in the MPPT mode and serves as the basic constant output part of the zero-carbon super generator set, while 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. Its active support capability is mainly achieved by the new DC direct-hung energy storage power station. In the case of SoC abnormalities, the energy storage battery is protected by adjusting the output of new energy or adjusting the commissioning of the DC energy storage valve of the energy storage power station. The proposed scheme reasonably balances the system stability requirements and the economic operation needs of the zero-carbon generator set. Through the SOC information of the energy storage power station, the output of the new energy unit and the energy storage power station is regulated in stages. Under the premise of ensuring the active support needs of the system, the MPPT energy capture of the new energy is guaranteed to the greatest extent to prevent excessive battery charging and discharging.

[0246] 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.

[0247] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed 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 part of the steps or stages in other steps.

[0248] Based on the same inventive concept, the embodiment of the present application also provides a control device for a generator set system for implementing the control method of the generator set system involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in the embodiments of the control device for one or more generator set systems provided below can refer to the limitations of the control method for the generator set system above, and will not be repeated here.

[0249] 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 are connected to the AC bus through a voltage coupling device, Fig.13As shown, the control device of the generator set system in some embodiments includes:

[0250] 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;

[0251] The measurement value acquisition module 132 is used to obtain the grid frequency measurement value when it is determined that the generator system participates in the primary frequency regulation;

[0252] The control module 133 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.

[0253] In some embodiments, the control module 133 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.

[0254] In some embodiments, the control module 133 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.

[0255] 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 setting 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.

[0256] In some embodiments, the control module 133 is used to control the energy storage power station to enter the charging mode if the new energy station is in the load reduction operation mode, and to control the energy storage power station to stop outputting power if the new energy station is not in the load reduction operation mode, when the change in the grid frequency is less than the first dead zone value and the charging and discharging state of the energy storage power station is that the SOC of the energy storage power station is less than the minimum operating setting value.

[0257] 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 charging and discharging state is that the SOC of the energy storage power station is normal or greater than the maximum operating setting value.

[0258] In some embodiments, the control module 133 is used to control the inertia and frequency regulation process 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.

[0259] 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 state is that the SOC of the energy storage power station is normal or less than the minimum operating setting value.

[0260] In some embodiments, the control module 133 is used to control the inertia and frequency modulation processing of the energy storage power station to absorb power when the grid frequency change is greater than the second dead zone value and the charging and discharging state is that the SOC of the energy storage power station is normal or less than the minimum operating setting value.

[0261] 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.

[0262] In some embodiments, the control module 133 is used to control the energy storage power station to stop outputting power when the grid frequency change is greater than the second dead zone value and the charge and discharge state is that the energy storage power station SOC is greater than the maximum operating setting value.

[0263] Each module in the control device of the above generator set system can be implemented in whole or in part by software, hardware or a combination thereof. Each module can be embedded in or independent of a processor in an electronic device in the form of hardware, or can be stored in a memory in the electronic device in the form of software, so that the processor can call and execute the operations corresponding to each module.

[0264] In one embodiment, an electronic device is provided. The electronic device may be a terminal, and its internal structure diagram may be as follows: Fig.14 As shown. The electronic device includes a processor, a memory, a communication interface and an input device connected by a system bus. Among them, 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, and the wireless method 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 system is implemented. The input device of the electronic device can be a touch layer covered on the display screen, or it can be a button, trackball or touchpad set on the housing of the electronic device, or it can be an external keyboard, touchpad or mouse.

[0265] Those skilled in the art will understand that Fig.14The structure shown in the figure 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 arrangement of components.

[0266] In one embodiment, an electronic device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the steps of the method for controlling a generator set system in any of the embodiments described above are implemented.

[0267] 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.

[0268] In one embodiment, a computer program product or computer program is provided, the computer program product or computer program includes computer instructions, the computer instructions are stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the steps of the control method of the generator set system of any of the above embodiments.

[0269] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed 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 can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory or optical memory, etc. Volatile memory can 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).

[0270] 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 replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate 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, characterized in that: 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 a first side of the voltage coupling device, the energy storage power station is connected to a second side of the voltage coupling device, and a third side of the voltage coupling device is connected to an AC bus.

2. The generator set system according to claim 1, characterized in that: The voltage coupling device comprises a three-winding transformer.

3. The generator set system according to claim 1 or 2, characterized in that: 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.

4. The generator set system according to any one of claims 1 to 3, characterized in that: The new energy stations include multiple ones.

5. The zero-carbon generator system according to claim 4, characterized in that: The generator set system also includes a busbar transformer. After the new energy station is connected to a busbar through the busbar transformer, it is connected to the first side of the voltage coupling device through the busbar.

6. The generator set system according to any one of claims 1 to 5, characterized in that: 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.

7. The generator set system according to any one of claims 1 to 6, characterized in that: The energy storage power station comprises an energy storage valve and a converter valve connected to each other.

8. A control method for a generator system, characterized in that: 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.

9. The method according to claim 8, characterized in that 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.

10. The method according to claim 8, characterized in that 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.

11. The method according to claim 10, characterized in that 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.

12. The method according to claim 11, characterized in that 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.

13. A control device for a generator system, characterized in that: 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, used for obtaining a dispatch instruction and determining whether the generator set system participates in a primary frequency regulation based on the dispatch instruction; 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.

14. 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 8 to 12 are implemented.

15. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 8 to 12 are implemented.

16. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 8 to 12 are implemented.

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