Frequency modulation coordination control method and system applied to power system and electronic equipment

Abstract

The invention relates to the field of power systems, in particular to a frequency modulation coordination control method and system applied to a power system and a medium, and the method comprises the steps that the frequency of the power system is monitored in real time through a frequency monitoring module of the power system, and the frequency monitoring module sends frequency data to a dispatching center for processing; the rotating speed, the load and the frequency of a generator set unit in a power system are monitored in real time, and frequency data are collected; calculating SOC values of the generator set units and the generator sets according to the collected rotating speeds of the generator set units, and grouping according to the SOC values of the generator set units; the dispatching center analyzes the received frequency data and judges that the frequency of the power system enters a frequency dead zone, if the frequency of the power system enters the frequency dead zone, the dispatching center starts frequency modulation compensation and sends a dispatching instruction to a generator set, and the generator set responds according to the dispatching instruction and adjusts the output power. The frequency stability of the power system can be improved on the basis of ensuring the frequency modulation effect of the power system, and safe and stable operation of the power system is facilitated.

Description

Technical Field

[0001] The present invention relates to the field of power systems, and in particular to a frequency coordination control method, system, electronic equipment and computer-readable storage medium applied to power systems. Background Art

[0002] The patent document (CN103595045B) discloses a load frequency coordination control method for a wind-diesel hybrid power system in which a wind turbine participates in frequency modulation. The wind-diesel hybrid power system includes a wind power generation subsystem and a diesel engine subsystem. The load frequency coordination control method includes the following steps: 1) using the output power of the wind power generation subsystem as the control input of the diesel engine subsystem, establishing a system state equation, and using a sliding mode controller to calculate the control input u(t) of the diesel engine subsystem in the hybrid power system; 2) using u(t) calculated in step 1) as the control instruction of the wind power generation subsystem, and using a PID variable pitch control method according to the control instruction to control the output power of the wind turbine generator, and optimize the frequency deviation of the entire hybrid power system. Compared with the prior art, the present invention has the advantages of high control accuracy and effective improvement of the load frequency deviation of the power system. However, the existing frequency modulation coordination control method of the power system cannot improve the frequency stability of the power system on the basis of ensuring the frequency modulation effect of the power system, which is not conducive to the safe and stable operation of the power system. Summary of the invention

[0003] The present invention provides a frequency coordination control method, system and computer-readable storage medium applied to an electric power system, the main purpose of which is to improve the frequency stability of the electric power system on the basis of ensuring the frequency regulation effect of the electric power system, which is conducive to the safe and stable operation of the electric power system.

[0004] To achieve the above object, the present invention provides a frequency regulation coordination control method applied to a power system, comprising:

[0005] The frequency of the power system is monitored in real time by a frequency monitoring module of the power system. The frequency monitoring module sends the frequency data to the dispatching center for processing, monitors the speed, load and frequency of the generator units in the power system in real time, and collects the frequency data;

[0006] Calculating the SOC values ​​of the generator set units and the generator group according to the collected rotation speed of the generator set units, and grouping the generator set units according to the SOC values;

[0007] The dispatch center analyzes the received frequency data and determines whether the frequency of the power system enters a frequency dead zone. If the frequency enters the frequency dead zone, the dispatch center starts frequency compensation and sends a dispatch instruction to the generator set. The generator set responds according to the dispatch instruction and adjusts the output power.

[0008] The power signal of the output power is transmitted to the main controller of the power system, and the frequency balance point is configured, and the main controller of the power system performs load distribution on the generator set unit;

[0009] The dispatching center continuously monitors frequency changes according to the load distribution results until the frequency returns to stability and completes the power system frequency regulation.

[0010] Preferably, the calculating the SOC values ​​of the generator set units and the generator group according to the collected rotation speed of the generator set units, and grouping the generator set units according to the SOC values, comprises:

[0011] Calculate the SOC value of the generator unit and the generator set respectively according to the generator unit speed, the maximum angular velocity and the minimum angular velocity;

[0012] The expression of the SOC value of the generator unit is:

[0013]

[0014] Among them, S i Expressed as the SOC value of the generator unit, ω i Expressed as the speed of the i-th generator unit, ω imax ,ω imin They are respectively represented as the maximum angular velocity and the minimum angular velocity of the i-th generator unit;

[0015] The expression of the SOC value of the generator set is:

[0016]

[0017] Among them, S n It is represented as the SOC value of the generator set, and n is represented as the number of generator units in the generator set;

[0018] The generator units are grouped according to their SOC values. When the generator units are discharged, the units with SOC values ​​greater than 0.2 are group H, and the units with SOC values ​​between 0.2 and 0.7 are group M. d When the generator unit is charged, the unit with SOC value less than 0.3 is group L, and the unit with SOC value between 0.3 and 0.8 is group M. c Group.

[0019] Preferably, if the frequency dead zone is entered, the dispatch center starts frequency compensation and sends a dispatch instruction to the generator set, and the generator set responds according to the dispatch instruction and adjusts the output power, including:

[0020] The dispatch center starts frequency compensation and sends a dispatch instruction to the generator set;

[0021] The dispatch instruction sets the adjustment coefficient λ according to the SOC value of the generator unit and the generator set;

[0022] The basic output power and additional output power of the generator set for primary frequency regulation are calculated by the adjustment coefficient λ, and the expression is:

[0023]

[0024] Among them, P b , P a Respectively represent the basic output power and additional output power, K F It is expressed as the unit regulation power of the generator set, Δf is expressed as the frequency deviation of the power system, Expressed as an additional coefficient;

[0025] The output power is adjusted by the basic output power and the additional output power, and the expression is:

[0026] P t =P b +P a

[0027] Among them, P t It is expressed as the output power of the generator set during primary frequency regulation.

[0028] Preferably, the frequency balance point configuration comprises:

[0029] Before load distribution, analyze and configure the desired balance point of the power system;

[0030] Taking the lowest frequency point of the power system being less than the steady-state frequency deviation as a constraint condition, and then taking the approximate maximum value of the steady-state frequency deviation of the power system as the expected balance value;

[0031] The approximate minimum value of the steady-state frequency deviation of the power system is taken as the lowest frequency point, and the expected lowest frequency point close to the steady-state frequency deviation value and satisfying the prerequisite is obtained. When the expected balance value is reached, the system is in a stable state.

[0032] Preferably, the main controller of the power system performs load distribution on the generator set units, including:

[0033] According to the grouping result of the generator set units, determining whether there are H groups of generator units;

[0034] If there are H groups of generator units, calculate the distributed power of the H groups of generator units, the expression is:

[0035]

[0036] Among them, P H It is represented by the distributed power of H group of generator units, k is represented by the number of H group of generator units, P mi Expressed as the rated power of the i-th generator unit in group H;

[0037] Compare the distributed power P of the H group of generator units H With output power P t The size of P H >P t , it is said that power is allocated according to the power ratio in the time period;

[0038] If P H ≤P t , the flywheel power of group H is based on the rated power P of each generator unit mi Assign, calculate M d The distributed power of the generator unit is And distribute it to M according to the power ratio of the timing period d Group each generator unit;

[0039] If there is no H group generator unit, then M d The distribution power of the generator unit meets And distribute it to M according to the power ratio of the timing period d Group generator unit;

[0040] The L group and M c The load distribution of the group is consistent with the above.

[0041] Preferably, the dispatching center continuously monitors the frequency change according to the load distribution result until the frequency returns to stability and completes the power system frequency regulation, including:

[0042] After the power system frequency is restored to a normal state through load distribution, the dispatch center starts the SOC self-recovery function of the generator unit;

[0043] Through the power system frequency self-recovery power limit P lim Limit the power of charging and discharging of the generator unit;

[0044] During the generator unit SOC self-recovery process, the generator units are grouped according to their SOC values, with generator units below 0.5 being grouped into group I and generator units above 0.5 being grouped into group II;

[0045] The I group of generator units are charged and recovered, and the II group of generator units are discharged and recovered. The self-recovery power of each group of generator units is:

[0046]

[0047] Among them, P r It is expressed as the self-recovery power of each generator unit, where n is the number of flywheel units in the group.

[0048] Frequency coordination control system applied to power system, including:

[0049] A monitoring module monitors the frequency of the power system in real time through a frequency monitoring module of the power system. The frequency monitoring module sends the frequency data to the dispatching center for processing, monitors the speed, load and frequency of the generator units in the power system in real time, and collects the frequency data;

[0050] A grouping module, which calculates the SOC values ​​of the generator set units and the generator group according to the collected rotation speed of the generator set units, and groups the generator set units according to the SOC values;

[0051] The power regulation module, the dispatch center analyzes the received frequency data and determines whether the frequency of the power system enters the frequency dead zone. If it enters the frequency dead zone, the dispatch center starts frequency regulation compensation and sends a dispatch instruction to the generator set. The generator set responds according to the dispatch instruction and adjusts the output power;

[0052] A load distribution module transmits the power signal of the output power to the main controller of the power system and performs frequency balance point configuration, and the main controller of the power system performs load distribution on the generator set unit;

[0053] Recovery module, the dispatching center continuously monitors frequency changes according to the load distribution results until the frequency returns to stability and completes the power system frequency regulation.

[0054] In order to solve the above problem, the present invention further provides an electronic device, the electronic device comprising:

[0055] a memory storing at least one instruction; and

[0056] The processor executes the instructions stored in the memory to implement the frequency coordination control method applied to the power system as described above.

[0057] In order to solve the above problem, the present invention also provides a computer-readable storage medium, in which at least one instruction is stored. The at least one instruction is executed by a processor in an electronic device to implement the above-mentioned frequency coordination control method applied to the power system.

[0058] In order to solve the problems described in the background technology, the embodiment of the present invention first monitors the frequency of the power system in real time through the heavy frequency monitoring module of the power system, and the frequency monitoring module sends the frequency data to the dispatching center for processing; then the SOC values ​​of the generator unit and the generator set are calculated according to the collected generator unit speed, and the generator units are grouped according to the SOC values ​​of the generator unit; then the dispatching center analyzes the received frequency data, determines that the frequency of the power system enters the frequency dead zone, sends a dispatching instruction to the generator unit, and the generator unit responds according to the dispatching instruction and adjusts the output power; then the frequency balance point is configured, and the main controller of the power system distributes the load to the generator unit; finally, the dispatching center continuously monitors the frequency change according to the load distribution result until the frequency returns to stability and the power system frequency modulation is completed. Therefore, the frequency modulation coordination control method, system, electronic device and computer-readable storage medium applied to the power system proposed by the present invention can improve the frequency stability of the power system on the basis of ensuring the frequency modulation effect of the power system, which is conducive to the safe and stable operation of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 A flow chart of a frequency coordination control method applied to a power system provided by an embodiment of the present invention;

[0060] Figure 2 A functional module diagram of a frequency regulation coordination control system applied to a power system provided by an embodiment of the present invention;

[0061] Figure 3 A schematic diagram of the structure of an electronic device for implementing the frequency coordination control method applied to a power system provided in one embodiment of the present invention.

[0062] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0063] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0064] The embodiment of the present application provides a frequency coordination control method applied to an electric power system. The execution subject of the frequency coordination control method applied to an electric power system includes but is not limited to at least one of the electronic devices such as a server and a terminal that can be configured to execute the method provided by the embodiment of the present application. In other words, the frequency coordination control method applied to an electric power system can be executed by software or hardware installed on a terminal device or a server device, and the software can be a blockchain platform. The server includes but is not limited to: a single server, a server cluster, a cloud server or a cloud server cluster, etc.

[0065] Reference Figure 1 FIG. 1 is a flow chart of a frequency coordination control method applied to a power system provided by an embodiment of the present invention. In this embodiment, the frequency coordination control method applied to a power system includes:

[0066] The frequency of the power system is monitored in real time by a frequency monitoring module of the power system. The frequency monitoring module sends the frequency data to the dispatching center for processing, monitors the speed, load and frequency of the generator units in the power system in real time, and collects the frequency data;

[0067] Calculating the SOC values ​​of the generator set units and the generator group according to the collected rotation speed of the generator set units, and grouping the generator set units according to the SOC values;

[0068] Further, the calculating the SOC values ​​of the generator set units and the generator group according to the collected rotation speed of the generator set units, and grouping the generator set units according to the SOC values, includes:

[0069] Calculate the SOC value of the generator unit and the generator set respectively according to the generator unit speed, the maximum angular velocity and the minimum angular velocity;

[0070] The expression of the SOC value of the generator unit is:

[0071]

[0072] Among them, S i Expressed as the SOC value of the generator unit, ω i Expressed as the speed of the i-th generator unit, ω imax ,ω imin They are respectively represented as the maximum angular velocity and the minimum angular velocity of the i-th generator unit;

[0073] The expression of the SOC value of the generator set is:

[0074]

[0075] Among them, S n It is represented as the SOC value of the generator set, and n is represented as the number of generator units in the generator set;

[0076] The generator units are grouped according to their SOC values. When the generator units are discharged, the units with SOC values ​​greater than 0.2 are group H, and the units with SOC values ​​between 0.2 and 0.7 are group M. d When the generator unit is charged, the unit with SOC value less than 0.3 is group L, and the unit with SOC value between 0.3 and 0.8 is group M. c Group.

[0077] The dispatch center analyzes the received frequency data and determines whether the frequency of the power system enters a frequency dead zone. If the frequency enters the frequency dead zone, the dispatch center starts frequency compensation and sends a dispatch instruction to the generator set. The generator set responds according to the dispatch instruction and adjusts the output power.

[0078] Furthermore, if the frequency dead zone is entered, the dispatch center starts frequency compensation and sends a dispatch instruction to the generator set, and the generator set responds according to the dispatch instruction and adjusts the output power, including:

[0079] The dispatch center starts frequency compensation and sends a dispatch instruction to the generator set;

[0080] The dispatch instruction sets the adjustment coefficient λ according to the SOC value of the generator unit and the generator set;

[0081] The basic output power and additional output power of the generator set for primary frequency regulation are calculated by the adjustment coefficient λ, and the expression is:

[0082]

[0083] Among them, P b , P a Respectively represent the basic output power and additional output power, K F It is expressed as the unit regulation power of the generator set, Δf is expressed as the frequency deviation of the power system, Expressed as an additional coefficient;

[0084] The output power is adjusted by the basic output power and the additional output power, and the expression is:

[0085] P t =P b +P a

[0086] Among them, P t It is expressed as the output power of the generator set during primary frequency regulation.

[0087] The power signal of the output power is transmitted to the main controller of the power system, and the frequency balance point is configured, and the main controller of the power system performs load distribution on the generator set unit;

[0088] Furthermore, the frequency balance point configuration includes:

[0089] Before load distribution, analyze and configure the desired balance point of the power system;

[0090] Taking the lowest frequency point of the power system being less than the steady-state frequency deviation as a constraint condition, and then taking the approximate maximum value of the steady-state frequency deviation of the power system as the expected balance value;

[0091] The approximate minimum value of the steady-state frequency deviation of the power system is taken as the lowest frequency point, and the expected lowest frequency point close to the steady-state frequency deviation value and satisfying the prerequisite is obtained. When the expected balance value is reached, the system is in a stable state.

[0092] Specifically, the main controller of the power system performs load distribution on the generator set unit, including:

[0093] According to the grouping result of the generator set units, determining whether there are H groups of generator units;

[0094] If there are H groups of generator units, calculate the distributed power of the H groups of generator units, the expression is:

[0095]

[0096] Among them, P H It is represented by the distributed power of H group of generator units, k is represented by the number of H group of generator units, P mi Expressed as the rated power of the i-th generator unit in group H;

[0097] Compare the distributed power P of the H group of generator units H With output power P t The size of P H >P t , it is said that power is allocated according to the power ratio in the time period;

[0098] If P H ≤P t , the flywheel power of group H is based on the rated power P of each generator unit mi Assign, calculate M d The distributed power of the generator unit is And distribute it to M according to the power ratio of the timing period d Group each generator unit;

[0099] If there is no H group generator unit, then M d The distribution power of the generator unit meets And distribute it to M according to the power ratio of the timing period d Group generator unit;

[0100] The L group and M c The load distribution of the group is consistent with the above.

[0101] The dispatching center continuously monitors frequency changes according to the load distribution results until the frequency returns to stability and completes the power system frequency regulation.

[0102] Furthermore, the dispatching center continuously monitors the frequency change according to the load distribution result until the frequency is restored to stability and the power system frequency regulation is completed, including:

[0103] After the power system frequency is restored to a normal state through load distribution, the dispatch center starts the SOC self-recovery function of the generator unit;

[0104] Through the power system frequency self-recovery power limit P lim Limit the power of charging and discharging of the generator unit;

[0105] During the generator unit SOC self-recovery process, the generator units are grouped according to their SOC values, with generator units below 0.5 being grouped into group I and generator units above 0.5 being grouped into group II;

[0106] The I group of generator units are charged and recovered, and the II group of generator units are discharged and recovered. The self-recovery power of each group of generator units is:

[0107] Among them, P r It is expressed as the self-recovery power of each generator unit, where n is the number of flywheel units in the group.

[0108] In order to solve the problems described in the background technology, the embodiment of the present invention first monitors the frequency of the power system in real time through the heavy frequency monitoring module of the power system, and the frequency monitoring module sends the frequency data to the dispatching center for processing; then the SOC values ​​of the generator unit and the generator set are calculated according to the collected generator unit speed, and the generator units are grouped according to the SOC values ​​of the generator unit; then the dispatching center analyzes the received frequency data, determines that the frequency of the power system enters the frequency dead zone, sends a dispatching instruction to the generator unit, and the generator unit responds according to the dispatching instruction and adjusts the output power; then the frequency balance point is configured, and the main controller of the power system distributes the load to the generator unit; finally, the dispatching center continuously monitors the frequency change according to the load distribution result until the frequency returns to stability and the power system frequency modulation is completed. Therefore, the frequency modulation coordination control method, system, electronic device and computer-readable storage medium applied to the power system proposed by the present invention can improve the frequency stability of the power system on the basis of ensuring the frequency modulation effect of the power system, which is conducive to the safe and stable operation of the power system.

[0109] like Figure 2 , which is a functional module diagram of a frequency regulation coordination control system applied to a power system provided by an embodiment of the present invention.

[0110] The frequency regulation coordination control system 100 applied to the power system of the present invention can be installed in an electronic device. According to the functions to be implemented, the frequency regulation coordination control system 100 applied to the power system may include a monitoring module 101, a grouping module 102, a power regulation module 103, a load distribution module 104 and a recovery module 105. The module of the present invention may also be referred to as a unit, which refers to a series of computer program segments that can be executed by a processor of an electronic device and can complete fixed functions, which are stored in the memory of the electronic device.

[0111] Frequency coordination control system applied to power system, including:

[0112] The monitoring module 101 monitors the frequency of the power system in real time through the frequency monitoring module of the power system. The frequency monitoring module sends the frequency data to the dispatching center for processing, monitors the speed, load and frequency of the generator units in the power system in real time, and collects the frequency data;

[0113] A grouping module 102 calculates the SOC values ​​of the generator set units and the generator group according to the collected rotation speed of the generator set units, and groups the generator set units according to the SOC values;

[0114] The power regulation module 103, the dispatch center analyzes the received frequency data and determines whether the frequency of the power system enters the frequency dead zone. If it enters the frequency dead zone, the dispatch center starts frequency regulation compensation and sends a dispatch instruction to the generator set. The generator set responds according to the dispatch instruction and adjusts the output power;

[0115] The load distribution module 104 transmits the power signal of the output power to the main controller of the power system and performs frequency balance point configuration, and the main controller of the power system performs load distribution on the generator unit;

[0116] Restoration module 105, the dispatch center continuously monitors the frequency change according to the load distribution result until the frequency is restored to stability and the power system frequency regulation is completed.

[0117] In detail, the modules in the frequency coordination control system 100 applied to the power system in the embodiment of the present invention are used in the same manner as described above. Figure 1 The technical means are the same as the blockchain-based product supply chain management method described in, and can produce the same technical effects, so I will not go into details here.

[0118] like Figure 3 1 is a schematic diagram of the structure of an electronic device for implementing a frequency coordination control method applied to a power system provided by an embodiment of the present invention.

[0119] The electronic device 1 may include a processor 10, a memory 11 and a bus 12, and may also include a computer program stored in the memory 11 and executable on the processor 10, such as a frequency coordination control program applied to a power system.

[0120] The memory 11 includes at least one type of readable storage medium, and the readable storage medium includes flash memory, mobile hard disk, multimedia card, card-type memory (for example: SD or DX memory, etc.), magnetic memory, disk, optical disk, etc. The memory 11 may be an internal storage unit of the electronic device 1 in some embodiments, such as a mobile hard disk of the electronic device 1. The memory 11 may also be an external storage device of the electronic device 1 in other embodiments, such as a plug-in mobile hard disk, a smart memory card (SmartMediaCard, SMC), a secure digital (SecureDigital, SD) card, a flash card (FlashCard), etc. equipped on the electronic device 1. Further, the memory 11 may also include both an internal storage unit of the electronic device 1 and an external storage device. The memory 11 may not only be used to store application software and various types of data installed in the electronic device 1, such as the code of the frequency coordination control method program applied to the power system, but also be used to temporarily store data that has been output or is to be output.

[0121] The processor 10 may be composed of an integrated circuit in some embodiments, for example, a single packaged integrated circuit, or a plurality of packaged integrated circuits with the same or different functions, including one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and combinations of various control chips, etc. The processor 10 is the control core (Control Unit) of the electronic device, and uses various interfaces and lines to connect various components of the entire electronic device, and executes or executes programs or modules stored in the memory 11 (such as frequency coordination control programs applied to power systems, etc.), and calls data stored in the memory 11 to execute various functions of the electronic device 1 and process data.

[0122] The bus 12 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus 12 may be divided into an address bus, a data bus, a control bus, etc. The bus 12 is configured to realize connection and communication between the memory 11 and at least one processor 10, etc.

[0123] Figure 3 Only an electronic device with components is shown, and those skilled in the art will understand that Figure 3 The structure shown does not constitute a limitation on the electronic device 1, and may include fewer or more components than shown in the figure, or combine certain components, or arrange the components differently.

[0124] For example, although not shown, the electronic device 1 may also include a power source (such as a battery) for supplying power to each component. Preferably, the power source may be logically connected to the at least one processor 10 through a power management device, so that the power management device can realize functions such as charging management, discharging management, and power consumption management. The power source may also include any components such as one or more DC or AC power sources, recharging devices, power failure detection circuits, power converters or inverters, power status indicators, etc. The electronic device 1 may also include a variety of sensors, Bluetooth modules, Wi-Fi modules, etc., which will not be repeated here.

[0125] Furthermore, the electronic device 1 may also include a network interface. Optionally, the network interface may include a wired interface and / or a wireless interface (such as a WI-FI interface, a Bluetooth interface, etc.), which is generally used to establish a communication connection between the electronic device 1 and other electronic devices.

[0126] Optionally, the electronic device 1 may further include a user interface, which may be a display (Display), an input unit (such as a keyboard (Keyboard)), and optionally, the user interface may also be a standard wired interface or a wireless interface. Optionally, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, and an OLED (Organic Light-Emitting Diode) touch device, etc. The display may also be appropriately referred to as a display screen or a display unit, which is used to display information processed in the electronic device 1 and to display a visual user interface.

[0127] It should be understood that the embodiment is for illustration only and the scope of the patent application is not limited to this structure.

[0128] The frequency coordination control program applied to the power system stored in the memory 11 in the electronic device 1 is a combination of multiple instructions. When running in the processor 10, it can achieve:

[0129] The frequency of the power system is monitored in real time by a frequency monitoring module of the power system. The frequency monitoring module sends the frequency data to the dispatching center for processing, monitors the speed, load and frequency of the generator units in the power system in real time, and collects the frequency data;

[0130] Calculating the SOC values ​​of the generator set units and the generator group according to the collected rotation speed of the generator set units, and grouping the generator set units according to the SOC values;

[0131] The dispatch center analyzes the received frequency data and determines whether the frequency of the power system enters a frequency dead zone. If the frequency enters the frequency dead zone, the dispatch center starts frequency compensation and sends a dispatch instruction to the generator set. The generator set responds according to the dispatch instruction and adjusts the output power.

[0132] The power signal of the output power is transmitted to the main controller of the power system, and the frequency balance point is configured, and the main controller of the power system performs load distribution on the generator set unit;

[0133] The dispatching center continuously monitors frequency changes according to the load distribution results until the frequency returns to stability and completes the power system frequency regulation.

[0134] Specifically, the specific implementation method of the processor 10 for the above instructions can refer to Figures 1 to 3 The description of the relevant steps in the corresponding embodiments will not be repeated here.

[0135] Furthermore, if the module / unit integrated in the electronic device 1 is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. The computer-readable storage medium can be volatile or non-volatile. For example, the computer-readable medium can include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a mobile hard disk, a magnetic disk, an optical disk, a computer memory, and a read-only memory (ROM).

[0136] The present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor of an electronic device, the computer program can implement:

[0137] The frequency of the power system is monitored in real time by a frequency monitoring module of the power system. The frequency monitoring module sends the frequency data to the dispatching center for processing, monitors the speed, load and frequency of the generator units in the power system in real time, and collects the frequency data;

[0138] Calculating the SOC values ​​of the generator set units and the generator group according to the collected rotation speed of the generator set units, and grouping the generator set units according to the SOC values;

[0139] The dispatch center analyzes the received frequency data and determines whether the frequency of the power system enters a frequency dead zone. If the frequency enters the frequency dead zone, the dispatch center starts frequency compensation and sends a dispatch instruction to the generator set. The generator set responds according to the dispatch instruction and adjusts the output power.

[0140] The power signal of the output power is transmitted to the main controller of the power system, and the frequency balance point is configured, and the main controller of the power system performs load distribution on the generator set unit;

[0141] The dispatching center continuously monitors frequency changes according to the load distribution results until the frequency returns to stability and completes the power system frequency regulation.

[0142] In the several embodiments provided by the present invention, it should be understood that the disclosed devices, apparatuses and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of the modules is only a logical function division, and there may be other division methods in actual implementation.

[0143] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0144] In addition, each functional module in each embodiment of the present invention may be integrated into one processing unit, each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional modules.

[0145] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0146] Therefore, no matter from which point of view, the embodiments should be regarded as illustrative and non-restrictive, and the scope of the present invention is limited by the appended claims rather than the above description, so it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any attached figure mark in the claims should not be regarded as limiting the claims involved.

[0147] The blockchain referred to in this invention is a new application mode of computer technologies such as distributed data storage, peer-to-peer transmission, consensus mechanism, encryption algorithm, etc. Blockchain is essentially a decentralized database, a string of data blocks generated by cryptographic methods. Each data block contains a batch of network transaction information, which is used to verify the validity of its information (anti-counterfeiting) and generate the next block. Blockchain can include the underlying blockchain platform, platform product service layer, and application service layer.

[0148] In addition, it is clear that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or devices stated in the system claim can also be implemented by one unit or device through software or hardware. The second and other words are used to indicate names, but not to indicate any particular order.

[0149] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A frequency coordination control method applied to a power system, characterized in that: The method comprises: The frequency of the power system is monitored in real time by a frequency monitoring module of the power system. The frequency monitoring module sends the frequency data to the dispatching center for processing, monitors the speed, load and frequency of the generator units in the power system in real time, and collects the frequency data; Calculating the SOC values ​​of the generator set units and the generator group according to the collected rotation speed of the generator set units, and grouping the generator set units according to the SOC values; The dispatch center analyzes the received frequency data and determines whether the frequency of the power system enters a frequency dead zone. If the frequency enters the frequency dead zone, the dispatch center starts frequency compensation and sends a dispatch instruction to the generator set. The generator set responds according to the dispatch instruction and adjusts the output power. The power signal of the output power is transmitted to the main controller of the power system, and the frequency balance point is configured, and the main controller of the power system performs load distribution on the generator set unit; The dispatching center continuously monitors frequency changes according to the load distribution results until the frequency returns to stability and completes the power system frequency regulation.

2. The frequency modulation coordination control method applied to the power system according to claim 1, characterized in that: The calculating the SOC values ​​of the generator set units and the generator group according to the collected rotation speed of the generator set units, and grouping the generator set units according to the SOC values, includes: Calculate the SOC value of the generator unit and the generator set respectively according to the generator unit speed, the maximum angular velocity and the minimum angular velocity; The expression of the SOC value of the generator unit is: Among them, S i Expressed as the SOC value of the generator unit, ω i Expressed as the speed of the i-th generator unit, ω imax ,ω imin They are respectively represented as the maximum angular velocity and the minimum angular velocity of the i-th generator unit; The expression of the SOC value of the generator set is: Among them, S n It is represented as the SOC value of the generator set, and n is represented as the number of generator units in the generator set; The generator units are grouped according to their SOC values. When the generator units are discharged, the units with SOC values ​​greater than 0.2 are group H, and the units with SOC values ​​between 0.2 and 0.7 are group M. d When the generator unit is charged, the unit with SOC value less than 0.3 is group L, and the unit with SOC value between 0.3 and 0.8 is group M. c Group.

3. The frequency coordination control method applied to the power system according to claim 1, characterized in that: If the frequency dead zone is entered, the dispatch center starts frequency compensation and sends a dispatch instruction to the generator set, and the generator set responds according to the dispatch instruction and adjusts the output power, including: The dispatch center starts frequency compensation and sends a dispatch instruction to the generator set; The dispatch instruction sets the adjustment coefficient λ according to the SOC value of the generator unit and the generator set; The basic output power and additional output power of the generator set for primary frequency regulation are calculated by the adjustment coefficient λ, and the expression is: Among them, P b , P a Respectively represent the basic output power and additional output power, K F It is expressed as the unit regulation power of the generator set, Δf is expressed as the frequency deviation of the power system, Expressed as an additional coefficient; The output power is adjusted by the basic output power and the additional output power, and the expression is: P t =P b +P a Among them, P t It is expressed as the output power of the generator set during primary frequency regulation.

4. The frequency modulation coordination control method applied to the power system according to claim 1, characterized in that: The frequency balance point configuration is performed, including: Before load distribution, analyze and configure the desired balance point of the power system; Taking the lowest frequency point of the power system being less than the steady-state frequency deviation as a constraint condition, and then taking the approximate maximum value of the steady-state frequency deviation of the power system as the expected balance value; The approximate minimum value of the steady-state frequency deviation of the power system is taken as the lowest frequency point, and the expected lowest frequency point close to the steady-state frequency deviation value and satisfying the prerequisite is obtained. When the expected balance value is reached, the system is in a stable state.

5. The frequency coordination control method applied to the power system according to claim 1, characterized in that: The main controller of the power system performs load distribution on the generator set unit, including: According to the grouping result of the generator set units, determining whether there are H groups of generator units; If there are H groups of generator units, calculate the distributed power of the H groups of generator units, the expression is: Among them, P H It is represented by the distributed power of H group of generator units, k is represented by the number of H group of generator units, P mi Expressed as the rated power of the i-th generator unit in group H; Compare the distributed power P of the H group of generator units H With output power P t The size of P H >P t , it is said that power is allocated according to the power ratio in the time period; If P H ≤P t , the flywheel power of group H is based on the rated power P of each generator unit mi Assign, calculate M d The distributed power of the generator unit is And distribute it to M according to the power ratio of the timing period d Group each generator unit; If there is no H group generator unit, then M d The distribution power of the generator unit meets And distribute it to M according to the power ratio of the timing period d Group generator unit; The L group and M c The load distribution of the group is consistent with the above.

6. The frequency coordination control method applied to the power system according to claim 1, characterized in that: The dispatch center continuously monitors the frequency change according to the load distribution result until the frequency is restored to stability and the power system frequency regulation is completed, including: After the power system frequency is restored to a normal state through load distribution, the dispatch center starts the SOC self-recovery function of the generator unit; Through the power system frequency self-recovery power limit P lim Limit the power of charging and discharging of the generator unit; During the generator unit SOC self-recovery process, the generator units are grouped according to their SOC values, with generator units below 0.5 being grouped into group I and generator units above 0.5 being grouped into group II; The I group of generator units are charged and recovered, and the II group of generator units are discharged and recovered. The self-recovery power of each group of generator units is: Among them, P r It is expressed as the self-recovery power of each generator unit, where n is the number of flywheel units in the group.

7. A frequency coordination control system applied to a power system, characterized in that: include: A monitoring module monitors the frequency of the power system in real time through a frequency monitoring module of the power system. The frequency monitoring module sends the frequency data to the dispatching center for processing, monitors the speed, load and frequency of the generator units in the power system in real time, and collects the frequency data; A grouping module, which calculates the SOC values ​​of the generator set units and the generator group according to the collected rotation speed of the generator set units, and groups the generator set units according to the SOC values; The power regulation module, the dispatch center analyzes the received frequency data and determines whether the frequency of the power system enters the frequency dead zone. If it enters the frequency dead zone, the dispatch center starts frequency regulation compensation and sends a dispatch instruction to the generator set. The generator set responds according to the dispatch instruction and adjusts the output power; A load distribution module transmits the power signal of the output power to the main controller of the power system and performs frequency balance point configuration, and the main controller of the power system performs load distribution on the generator set unit; Recovery module, the dispatching center continuously monitors frequency changes according to the load distribution results until the frequency returns to stability and completes the power system frequency regulation.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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