Island control method and system considering three-phase reclosing constraints of a single outgoing line of a wind power storage power plant

Abstract

The present invention discloses an islanding control method and system considering the three-phase reclosing constraint of a single outgoing line of a wind storage power plant, including: when a short-circuit fault occurs on the single outgoing line of the wind storage power plant and the line protection operates, detecting the state of charge of the supporting energy storage inside the wind farm; judging whether to execute the three-phase reclosing on both sides of the line according to the state of charge; when executing the three-phase reclosing on both sides of the line, the reclosing device on the outgoing line system side of the wind farm performs reclosing after a preset delay time; judging whether the reclosing on the system side is successful, and performing the reclosing operation on the wind farm side and the on / off states of the wind turbines and energy storage in the wind farm according to the judgment result. The method of the present invention can avoid the problem that the traditional automatic three-phase reclosing strategy cannot achieve the transient fault crossing of the single outgoing line of the wind storage power plant, reduce the risk of all units in the wind farm tripping off the grid, and improve the availability of the wind farm after a short-circuit fault occurs on the wind farm outgoing line.

Description

Technical Field

[0001] The present invention belongs to the technical field of relay protection of new energy power systems, and more specifically, relates to an island control method and system that takes into account the constraints of three-phase reclosing of a single-circuit outgoing line of a wind power plant. Background Art

[0002] Wind power generation has developed rapidly as an important power resource in my country. Wind farms are generally connected to the 10kV and above voltage level power grid through overhead transmission lines. When a transient fault occurs in the wind farm grid connection line, the line protection will trip the connection channel between the wind farm and the AC power grid. Since 90% of the faults in overhead transmission lines are transient faults, the configuration of automatic reclosing can improve the rapid recovery capability and reliability of the power grid after transient faults.

[0003] Since the circuit breakers of most transmission lines with voltage levels of 110kV and below are three-phase operating mechanisms, a three-phase reclosing method is generally used. According to the "DL / T 584-2017 3kV~110kV Power Grid Relay Protection Device Operation Setting Regulations", in principle, the large power supply side adopts the line no-voltage detection method, and the small power supply side adopts the synchronization detection method. Since there is usually an interval of no less than 1.5s between the line protection action and the reclosing action, the wind turbine is designed according to the principle of pursuing maximum wind power. During this period, the wind farm in the island state will have an imbalance in active power, resulting in voltage and frequency exceeding the limit on the wind farm side, thereby causing the wind farm to be disconnected from the grid as a whole. Therefore, based on the existing automatic three-phase reclosing strategy, once a transient fault occurs on the single-circuit transmission line of a wind farm with a voltage level of 110kV and below, the wind farm will be disconnected from the grid with a high probability, and the traditional automatic reclosing cannot be used to improve the speed and reliability of grid fault recovery.

[0004] With the development of energy storage technology in recent years, some wind farms have built supporting energy storage devices, but they are mainly used to adjust active and reactive power to smooth voltage and frequency fluctuations under steady-state operation conditions of wind farms to achieve the function of "peak shaving and valley filling". In view of the above problems, by giving full play to the role of internal energy storage in wind storage farms, an island control method considering the constraints of three-phase reclosing of single-circuit outgoing lines of wind storage farms is proposed to solve the problem that traditional three-phase reclosing cannot effectively ensure the reliable operation of wind farms in single-circuit outgoing lines of wind farms. Summary of the invention

[0005] In order to solve the deficiencies in the prior art, the present invention provides an island control method taking into account the three-phase reclosing constraint of a single-loop transmission line of a wind-storage power plant, so as to give full play to the role of supporting energy storage in the wind farm during the period when the transmission line fails and the reclosing action takes place, thereby avoiding to the greatest extent the risk of the entire wind farm being disconnected from the grid after a transient transmission line failure.

[0006] The present invention adopts the following technical solution.

[0007] An islanding control method considering the three-phase reclosing constraints of a single outgoing line of a wind-storage power plant, comprising the following steps:

[0008] Step 1, when a short-circuit fault occurs on the single outgoing line of the wind-storage power plant and the line protection operates, detect the state of charge of the supporting energy storage inside the wind farm;

[0009] Step 2, determine whether to perform three-phase reclosing on both sides of the line according to the state of charge of the supporting energy storage inside the wind farm;

[0010] Step 3, the reclosing device on the outgoing line system side of the wind farm performs reclosing after a preset delay time;

[0011] Step 4, determine whether the reclosing on the system side is successful, and perform the reclosing operation on the wind farm side and the on / off states of the wind turbines and energy storage inside the wind farm according to the judgment result.

[0012] Preferably, in the said Step 2,

[0013] If the state of charge of the energy storage has reached the maximum value, lock out the three-phase reclosing on both sides of the line, cut off all the units inside the wind farm, and the control method ends;

[0014] If the state of charge of the energy storage has not reached the maximum value, then perform three-phase reclosing on both sides of the line, and select whether to actively cut off a corresponding proportion of wind turbines according to the supporting energy storage capacity and the islanding frequency and voltage constraints.

[0015] Preferably, the selection of whether to actively cut off a corresponding proportion of wind turbines according to the supporting energy storage capacity constraints further includes:

[0016] Obtain the power generation power and the rated power of the energy storage under the current operating conditions of the wind farm;

[0017] If the power generation power P W of the wind farm under the current operating conditions is greater than the rated power P S of the energy storage, then cut off a corresponding proportion of wind turbines;

[0018] If the power generation power P W of the wind farm under the current operating conditions is less than or equal to the rated power P S of the energy storage, then do not cut off the wind turbines.

[0019] Preferably, the cutting off of a corresponding proportion of wind turbines further includes:

[0020] The power of the cut-off wind turbines is P W -P S ;

[0021] If the power generation power of a single wind turbine under the current operating conditions is P N , then select to cut off Set

[0022] A wind turbine unit, where round is a rounding function.

[0023] Preferably, the judgment logic in step S4 is that

[0024] If the system side reclosing fails, the wind farm side circuit breaker will no longer reclose, and the remaining wind turbines and energy storage devices inside the wind farm will be cut off;

[0025] If the system side reclosing is successful, the wind farm side will reclose through the synchronous checking method, and at the same time, the supporting energy storage device inside the wind farm will be withdrawn.

[0026] The present invention also provides an islanding control system considering the three-phase reclosing constraint of a single-circuit outgoing line of a wind and energy storage power farm, including: a state of charge detection module, a judgment module, and a control module;

[0027] Among them, the state of charge detection module is used to obtain the state of charge of the supporting energy storage inside the wind farm;

[0028] The judgment module is used to judge whether to perform three-phase reclosing on both sides of the line, whether the system side reclosing of the wind farm outgoing line is successful, whether to perform the wind farm side reclosing operation, and the continuous operation or stop of the wind turbines and energy storage inside the wind farm;

[0029] The control module is used to control the wind farm side reclosing operation and the on / off state of the wind turbines and energy storage inside the wind farm.

[0030] The present invention also provides a terminal, including a processor and a storage medium; the storage medium is used to store instructions;

[0031] The processor is used to operate according to the instructions to execute the steps of the islanding control method considering the three-phase reclosing constraint of a single-circuit outgoing line of a wind and energy storage power farm.

[0032] The present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the steps of the islanding control method considering the three-phase reclosing constraint of a single-circuit outgoing line of a wind and energy storage power farm are implemented.

[0033] The beneficial effect of the present invention is that, compared with the prior art, the islanding control method proposed by the present invention can avoid the problem that the traditional automatic three-phase reclosing strategy cannot achieve the transient fault crossing of a single-circuit outgoing line of a wind and energy storage power farm, reduce the risk of all units in the wind farm tripping off the network after a transient fault occurs, and improve the availability of the wind farm after a short-circuit fault occurs on the outgoing line. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is the overall flow schematic diagram of the islanding control method considering the three-phase reclosing constraint of a single-circuit outgoing line of a wind and energy storage power farm in the present invention;

[0035] Figure 2 It is a schematic structural diagram of an island control system considering the three-phase reclosing constraint of a single outgoing line of a wind storage power plant in the present invention;

[0036] Figure 3 It is a schematic diagram of the wind power export voltage and export current under the conventional automatic reclosing strategy;

[0037] Figure 4 It is a schematic diagram of the wind power export voltage and export current under the island control method of the present invention. Specific embodiments

[0038] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The embodiments described in this application are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the spirit of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0039] As Figure 1 shown, the present invention proposes an island control method considering the three-phase reclosing constraint of a single outgoing line of a wind storage power plant. This method is applicable to transmission lines with a voltage level of 110 kV and below that use three-phase reclosing. The method specifically includes the following steps:

[0040] Step 1, when a short-circuit fault occurs on the single outgoing line of the wind storage power plant and the line protection operates, detect the state of charge of the energy storage device supporting the wind farm inside the wind farm;

[0041] Among them, a control and protection device or a measurement and control device is configured in the energy storage device supporting the wind farm inside the wind farm, which can detect the state of charge of the energy storage device supporting the wind farm inside the wind farm in real time, that is, whether the state of charge of the energy storage battery reaches the maximum value.

[0042] Step 2, judge whether to perform reclosing on both sides of the line according to the state of charge of the energy storage device supporting the wind farm inside the wind farm. If three-phase reclosing on both sides of the line is to be performed, go to Step 3;

[0043] Among them, judging whether to perform reclosing on both sides of the line also includes:

[0044] If the state of charge of the energy storage device has reached the maximum value, block the reclosing on both sides of the line, cut off all the units inside the wind farm, and the control method ends;

[0045] If the state of charge of the energy storage device has not reached the maximum value, perform three-phase reclosing on both sides of the line. To avoid frequency over-limit during the island operation of the wind storage power plant, at the same time, select whether to actively cut off a corresponding proportion of wind turbines according to the constraint of the supporting energy storage capacity. At this time, an island operation state is formed inside the wind storage power plant.

[0046] Further, the supporting energy storage capacity refers to the rated operating power of the energy storage. Selecting whether to actively cut off a corresponding proportion of wind turbines according to the supporting energy storage capacity constraint further includes:

[0047] Obtain the total power generation P of the operating wind turbines under the current working condition of the wind farm W and the rated power P of the energy storage S ;

[0048] If the power generation P under the current working condition of the wind farm W is greater than the rated power P of the energy storage S , then cut off a corresponding proportion of wind turbines, and the total operating power of the cut-off wind turbines is P W -P S ;

[0049] The number of cut-off fan units is where PN is the power generation of a single wind turbine under the current working condition, and round is the rounding function. The cut-off wind turbines are the operating wind turbines;

[0050] It is considered that the wind speeds at each wind turbine in the wind farm are the same. Therefore, in the present invention, it is considered that the power generations of each fan at the same time are the same, all being P N

[0051] If the power generation P under the current working condition of the wind farm W is less than or equal to the rated power P of the energy storage S , then do not cut off the wind turbines.

[0052] Step 3, when performing three-phase reclosing on both sides of the line, the reclosing device on the outgoing line side of the wind farm performs reclosing after a preset delay time.

[0053] Preferably, the preset delay time is at least 1.5 s.

[0054] Step 4, determine whether the reclosing on the outgoing line side of the wind farm is successful, and perform the reclosing operation on the wind farm side and the on / off states of the wind turbines and energy storage in the wind farm according to the judgment result to complete the islanding control.

[0055] Specifically, according to the information on whether the reclosing on the outgoing line side of the wind farm is successful, if the reclosing on the system side fails, the breaker on the wind farm side will not reclose, and the remaining wind turbines and energy storage devices inside the wind farm will be cut off to stop their operation.

[0056] If the reclosing on the system side is successful, the wind farm side will reclose through the synchronization detection method, and at the same time, the supporting energy storage device in the wind farm will be withdrawn to stop the operation of the supporting energy storage device in the wind farm.

[0057] Among them, the protection device configured for the outgoing line of the wind farm can send out a signal indicating whether the reclosing is successful, so as to know whether the reclosing on the system side is successful.

[0058] As Figure 2 shown, the present invention also provides an islanding control system considering the three-phase reclosing constraint of a single outgoing line of a wind and energy storage farm. The above-mentioned islanding control method can be implemented based on this system, including: a state of charge detection module, a judgment module, and a control module;

[0059] Among them, the state of charge detection module is used to obtain the state of charge of the supporting energy storage inside the wind farm;

[0060] The judgment module is used to judge including whether to perform three-phase reclosing on both sides of the line, whether the reclosing on the system side of the outgoing line of the wind farm is successful, whether to perform the reclosing operation on the wind farm side, and the continuous operation or stop of the wind turbines and energy storage in the wind farm;

[0061] The control module is used to control the reclosing operation on the wind farm side, as well as the on / off state of the wind turbines and energy storage in the wind farm.

[0062] In order to verify the effect of the present invention in practical applications, the following is a specific simulation verification example of the present invention:

[0063] To verify the effectiveness of the islanding control method considering the reclosing constraint of a 110kV single outgoing line of a wind farm with supporting energy storage, a simulation model of a wind farm with supporting energy storage is built in MATLAB / SIMULINK software for verification. The main parameters of the simulation model are as follows:

[0064] The power generation of the wind farm is 20MW, including 10 direct-drive wind turbines of 2MW each. The terminal voltage of the turbines is 690V. The capacity of the supporting energy storage inside the wind farm is 10MW. Each wind turbine is connected to the 35kV collector line inside the wind farm through a terminal transformer, and is connected to the 110kV power grid through the main transformer of the wind farm and is connected to a nearby 110kV substation through a single-circuit overhead transmission line.

[0065] The implementation process of the control strategy proposed by the present invention is as Figure 1 shown. To verify the control effect of the control method proposed by the present invention, a conventional automatic reclosing strategy and the islanding control method proposed by the present invention are selected for simulation comparison. Combining Figure 3 、 4 shown, at 3.0s, a three-phase short-circuit fault is set on the single outgoing line of the wind farm, and the fault duration is 0.1s. The wind power export voltage and export current under the conventional automatic reclosing strategy are as Figure 3 shown, and the wind power export voltage and export current under the islanding control method proposed by the present invention are as Figure 4 shown.

[0066] FromFigure 3 It can be seen that when a short circuit occurs on the 110 kV single-circuit outgoing line of the wind farm, the AC side voltage drops. With the operation of the line protection, an islanding phenomenon occurs on the wind farm side. Since the wind power cannot be normally transmitted, the voltage at the wind power outlet rises rapidly. If this occurs during the actual operation of the wind farm, it will trigger the internal protection of the wind farm and cause the entire wind farm to trip off the grid.

[0067] It can be seen from Figure 4 that after adopting the islanding control method considering the reclosing constraint of the 110 kV single-circuit outgoing line of the wind farm with supporting energy storage proposed by the present invention, the wind farm side will switch the energy storage to the charging state and actively cut off 10 MW wind turbines, ensuring the balance of active power under the islanding operation state of the wind farm, and avoiding the over-limitation of the wind power outlet voltage and the phenomenon of the entire wind farm tripping off the grid during reclosing.

[0068] The beneficial effect of the present invention is that, compared with the prior art, the present invention can avoid the problem that the traditional automatic reclosing strategy cannot achieve the transient fault crossing of the 110 kV single-circuit outgoing line of the wind farm with supporting energy storage, reduce the risk of all the wind turbines in the wind farm tripping off the grid after a transient fault occurs, and improve the availability of the wind farm after a short-circuit fault occurs on the outgoing line.

[0069] The present disclosure may be a system, a method, and / or a computer program product. The computer program product may include a computer-readable storage medium having thereon computer-readable program instructions for causing a processor to implement various aspects of the present disclosure.

[0070] The computer-readable storage medium may be a tangible device that can retain and store instructions for use by an instruction execution device. The computer-readable storage medium may be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples (non-exhaustive list) of the computer-readable storage medium include: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disc read-only memory (CD-ROM), a digital versatile disc (DVD), a memory stick, a floppy disk, a mechanical encoding device, such as a punched card or raised structures in grooves having instructions stored thereon, and any suitable combination of the foregoing. The computer-readable storage medium used herein is not construed as an instantaneous signal itself, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagated through a waveguide or other transmission medium (e.g., an optical pulse through an optical fiber cable), or an electrical signal transmitted through a wire.

[0071] The computer-readable program instructions described herein can be downloaded to various computing / processing devices from a computer-readable storage medium or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network may include copper transmission cables, optical fiber transmission, wireless transmission, routers, firewalls, switches, gateway computers, and / or edge servers. A network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in a computer-readable storage medium in each computing / processing device.

[0072] The computer program instructions for performing the operations of the present disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state-setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages such as Smalltalk, C++, etc., and conventional procedural programming languages such as the "C" language or similar programming languages. The computer-readable program instructions may be executed entirely on the user's computer, partially on the user's computer, executed as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via an Internet service provider through the Internet). In some embodiments, by using the state information of the computer-readable program instructions to customize an electronic circuit, such as a programmable logic circuit, a field-programmable gate array (FPGA), or a programmable logic array (PLA), the electronic circuit can execute the computer-readable program instructions to implement various aspects of the present disclosure.

[0073] Aspects of the present disclosure are described herein with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present disclosure. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer-readable program instructions.

[0074] These computer-readable program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, or other programmable data processing apparatus to produce a machine such that the instructions, when executed by the processor of the computer or other programmable data processing apparatus, create a means for implementing the functions / acts specified in one or more boxes of the flowchart and / or block diagram. These computer-readable program instructions can also be stored in a computer-readable storage medium that causes a computer, programmable data processing apparatus, and / or other devices to function in a particular manner, such that the computer-readable medium storing the instructions comprises a manufacture including instructions for implementing various aspects of the functions / acts specified in one or more boxes of the flowchart and / or block diagram.

[0075] The computer-readable program instructions can also be loaded onto a computer, other programmable data processing apparatus, or other device so that a series of operational steps are performed on the computer, other programmable data processing apparatus, or other device to produce a computer-implemented process such that the instructions executed on the computer, other programmable data processing apparatus, or other device implement the functions / acts specified in one or more boxes of the flowchart and / or block diagram.

[0076] The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram may represent a module, segment, or portion of instructions, which comprises one or more executable instructions for implementing the specified logical function. In some alternative implementations, the functions noted in the boxes may occur out of the order noted in the figures. For example, two consecutive boxes may in fact be executed substantially in parallel, or they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each box of the block diagrams and / or flowcharts, and combinations of boxes in the block diagrams and / or flowcharts, can be implemented by special-purpose hardware-based systems that perform the specified functions or acts, or by combinations of special-purpose hardware and computer instructions.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications or equivalent replacements can still be made to the specific embodiments of the present invention, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be covered by the protection scope of the claims of the present invention.

Claims

1. An islanding control method considering the three-phase reclosing constraints of a single outgoing line in a wind power and energy storage power plant, characterized in that, It includes the following steps: Step 1: When a short - circuit fault occurs on a single - circuit outgoing line of a wind - storage power plant and the line protection operates, detect the state of charge of the energy storage device configured inside the wind farm. Step 2: Judge whether to perform three - phase reclosing on both sides of the line according to the state of charge of the energy storage device configured inside the wind farm. If three - phase reclosing on both sides of the line is to be performed, proceed to Step 3. Step 3: When performing three - phase reclosing on both sides of the line, the reclosing device on the outgoing line side of the wind farm performs reclosing after a preset delay time. Step 4: Judge whether the reclosing on the system side is successful, and perform the reclosing operation on the wind farm side and control the start - up and shutdown states of the wind turbines and energy storage devices inside the wind farm according to the judgment result.

2. The islanding control method considering the three - phase reclosing constraint of a single - circuit outgoing line of a wind - storage power plant according to claim 1, characterized in that In Step 1, through the control and protection device or measurement and control equipment configured in the energy storage device inside the wind farm, detect whether the state of charge of the energy storage battery reaches the maximum value.

3. The islanding control method considering the three - phase reclosing constraint of a single - circuit outgoing line of a wind - storage power plant according to claim 2, characterized in that In Step 2, judging whether to perform reclosing on both sides of the line further includes: If the state of charge of the energy storage device has reached the maximum value, block the three - phase reclosing on both sides of the line, cut off all the units inside the wind farm, and the control method ends. If the state of charge of the energy storage device has not reached the maximum value, perform three - phase reclosing on both sides of the line, and select whether to actively cut off a corresponding proportion of wind turbines according to the constraint of the configured energy storage capacity, and an island operation state is formed inside the wind - storage power plant.

4. The islanding control method considering the three - phase reclosing constraint of a single - circuit outgoing line of a wind - storage power plant according to claim 3, characterized in that Selecting whether to actively cut off a corresponding proportion of wind turbines according to the constraint of the configured energy storage capacity further includes: Get the total power generation P of the wind turbines in operation under the current working conditions of the wind farm W and energy storage rated power P S ; If the power generation power P of the wind farm under the current working condition W is greater than the rated power P of the energy storage S , then cut off the corresponding proportion of wind turbines; If the power generation power P of the wind farm under the current working condition W is less than or equal to the rated power P of the energy storage S , then the wind turbine is not cut off.

5. The islanding control method considering the three - phase reclosing constraint of a single - circuit outgoing line of a wind - storage power plant according to claim 4, characterized in that Cutting off a corresponding proportion of wind turbines further includes: The total operating power of the removed wind turbine is P W -P S ; The number of wind turbine units removed is where P N is the power generation of a single wind turbine unit under the current operating conditions, and round is the rounding function.

6. The islanding control method considering the three - phase reclosing constraint of a single - circuit outgoing line of a wind - storage power plant according to claim 1, characterized in that Step 4 further includes: If the reclosing on the system side fails, the breaker on the wind farm side will not reclose, and the remaining wind turbines and energy storage devices inside the wind farm will be cut off. If the reclosing on the system side is successful, the wind farm side will reclose through the method of checking synchronization, and at the same time, the energy storage device configured inside the wind farm will be taken out of service.

7. The islanding control method considering the three - phase reclosing constraint of a single - circuit outgoing line of a wind - storage power plant according to claim 6, characterized in that In Step 4, the protection device configured on the outgoing line of the wind farm can send a signal indicating whether the reclosing is successful, and judge whether the reclosing on the system side is successful according to the signal.

8. An islanding control system that implements the method described in any one of claims 1-7 and takes into account the three-phase reclosing constraints of a single outgoing line of a wind power storage power plant, characterized in that, It includes: A state - of - charge detection module, a judgment module, and a control module; Among them, the state - of - charge detection module is used to obtain the state of charge of the energy storage device configured inside the wind farm. The judgment module is used to judge including whether to perform three - phase reclosing on both sides of the line, whether the reclosing on the outgoing line side of the wind farm system is successful, whether to perform the reclosing operation on the wind farm side, and whether the wind turbines and energy storage devices inside the wind farm continue to operate or stop operating. The control module is used to control the reclosing operation of the wind farm, as well as the on / off states of the wind turbines and energy storage in the wind farm.

9. A terminal, comprising a processor and a storage medium; characterized in that: The storage medium is used to store instructions; The processor is used to operate according to the instructions to execute the steps of the method according to any one of claims 1-7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, the steps of the method according to any one of claims 1-7 are implemented.

Images