Operation control method and device of grid-type energy storage power station under multiple time scales

Abstract

The present application provides an operation control method and device for a grid-type energy storage power station under multiple time scales, and relates to the field of new energy storage technology for power systems. An operation control method for a grid-type energy storage power station under multiple time scales includes: determining the operating status of a regional power grid; setting control rules for the energy storage power station corresponding to the operating status; and executing the control rules to adjust the frequency of the regional power grid through the power of the energy storage power station. According to the embodiments of the present application, the economic efficiency of power grid operation can be improved and the ability to resist faults can be enhanced.

Description

Technical Field

[0001] The present application relates to the field of new energy storage technologies for power systems, and more specifically, to an operation control method and device for a grid-connected energy storage power station under multiple time scales. Background Art

[0002] At present, with the continuous increase in the scale of new energy grid connection, the proportion of traditional synchronous units in the power grid has been further squeezed. However, when the proportion of new energy reaches a certain level, the strength of the power grid will also decrease, and it is necessary to consider how to avoid various oscillations and other instability problems caused by the connection of new energy to the weak power grid.

[0003] The grid-type energy storage power station has almost the same external characteristics as the synchronous unit, and can also improve the short-circuit ratio of new energy. Engineering tests have shown that the grid-type energy storage power station has the ability to improve the short-circuit level of the system, and is suitable for use in areas where the short-circuit ratio of new energy is insufficient to improve the acceptance capacity of new energy.

[0004] In addition, the grid-type energy storage power station also has a strong overload capacity, which can provide stronger support for the power system. The working principle of the grid-type energy storage power station is different at different time scales. Therefore, using grid-type energy storage as a flexible control resource and maintaining the stability of the grid operation through different control methods at different time scales to maximize its utilization value is a new technical solution in the field of new energy storage technology. Summary of the invention

[0005] According to one aspect of the present application, a method for operating and controlling a grid-connected energy storage power station under multiple time scales is provided, comprising: determining the operating state of a regional power grid; setting control rules for the energy storage power station corresponding to the operating state; and executing the control rules to adjust the frequency of the regional power grid through the power of the energy storage power station.

[0006] According to some embodiments, the operating state includes a steady-state operating state, a fault disturbance state, and a post-disturbance recovery state; setting control rules for the energy storage power station corresponding to the operating state includes: setting an operating time scale for the control rules, wherein the operating time scale for the control rules corresponding to the stable operating state is long-term, the operating time scale for the control rules corresponding to the fault disturbance state is seconds, and the operating time scale for the control rules corresponding to the post-disturbance recovery state is minutes; and setting the priority of the control rules, wherein the priorities of the control rules are, from high to low, the control rules corresponding to the fault disturbance state, the control rules corresponding to the post-disturbance recovery state, and the control rules corresponding to the stable operating state.

[0007] According to some embodiments, setting control rules for the energy storage power station corresponding to the operating state also includes: when the regional power grid is in a steady-state operating state, obtaining the interconnection line power between the regional power grid and the main grid; determining whether the interconnection line power is within a preset rated operating range; and adjusting the power of the energy storage power station according to the determination result.

[0008] According to some embodiments, the power of the energy storage power station is adjusted according to the determined result, including: when the interconnection line power is within the rated operating range, obtaining a charge and discharge scheduling instruction to adjust the output power of the energy storage power station according to the charge and discharge scheduling instruction; when the interconnection line power exceeds the rated operating range, controlling the power or charge and discharge state of the energy storage power station to adjust the interconnection line power back to the rated operating range.

[0009] According to some embodiments, setting control rules for the energy storage power station corresponding to the operating state also includes: when the regional power grid is in a fault disturbance state, obtaining the frequency offset of the frequency of the regional power grid relative to the rated frequency; when the frequency offset exceeds a preset first threshold range, controlling the energy storage power station to perform a frequency modulation on the regional power grid so that the frequency offset falls back to the first threshold range; when the frequency modulation has been performed once and the frequency offset exceeds a preset second threshold range, performing emergency frequency modulation on the regional power grid through the overload capacity of the energy storage power station so that the frequency offset falls back to the second threshold range.

[0010] According to some embodiments, setting control rules for the energy storage power station corresponding to the operating state also includes: when the regional power grid is in a post-disturbance recovery state, obtaining automatic control instructions of the regional power grid; and controlling the power of the energy storage power station according to the automatic control instructions.

[0011] According to some embodiments, executing control rules to adjust the frequency of a regional power grid by power of an energy storage power station includes: executing the control rules according to priorities of the control rules to control the power of the energy storage power station.

[0012] According to one aspect of the present application, there is provided an operation control device for a grid-type energy storage power station under multiple time scales, comprising: an information acquisition module for determining the operation status of a regional power grid; a rule setting module for setting control rules for the energy storage power station corresponding to the operation status; and an execution module for executing the control rules to adjust the frequency of the regional power grid through the power of the energy storage power station.

[0013] According to one aspect of the present application, an electronic device is provided, comprising: one or more processors; a storage device for storing one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors implement the aforementioned method.

[0014] According to one aspect of the present application, a computer-readable storage medium is provided, on which a computer program or instruction is stored. When the computer program or instruction is executed by a processor, the aforementioned method is implemented.

[0015] According to the embodiments of the present application, the grid-type energy storage power station can be controlled to adjust the regional power grid at different time scales, and the overload capacity of the grid-type energy storage power station can be applied to the control of the regional power grid during large disturbances, so as to maximize the regulating role of the grid-type energy storage power station and maintain the stability of the grid operation.

[0016] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application.

[0018] Figure 1 A schematic diagram showing the structure of a grid-connected energy storage power station connected to a regional power grid containing new energy sources according to an example embodiment of the present application is shown.

[0019] Figure 2 A flow chart showing an operation control method of a grid-connected energy storage power station under multiple time scales according to an example embodiment of the present application is shown.

[0020] Figure 3 A graph showing the overload capacity of a grid-type energy storage power station according to an exemplary embodiment of the present application is shown.

[0021] Figure 4 A block diagram of an operation control device of a grid-type energy storage power station under multiple time scales according to an example embodiment of the present application is shown.

[0022] Figure 5 A block diagram of an electronic device according to an exemplary embodiment of the present application is shown. DETAILED DESCRIPTION

[0023] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be comprehensive and complete and will fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted.

[0024] The described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application may be put into practice without one or more of these specific details, or other modes, components, materials, devices or operations may be adopted. In these cases, known structures, methods, devices, realizations, materials or operations will not be shown or described in detail.

[0025] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0026] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0027] The present application provides an operation control method and device for a grid-connected energy storage power station under multiple time scales, which can adjust the frequency of a regional power grid by controlling the power of the energy storage power station to ensure the stability of the power grid operation.

[0028] The following will describe in detail an operation control method and device of a grid-type energy storage power station under multiple time scales according to an embodiment of the present application with reference to the accompanying drawings.

[0029] Figure 1 A schematic diagram showing the structure of a grid-connected energy storage power station connected to a regional power grid containing new energy sources according to an example embodiment of the present application is shown.

[0030] like Figure 1 As shown, the regional power grid 100 is connected to the grid-type energy storage power station 200, the main grid 300, the wind farm 400 and the photovoltaic power station 500 through transmission lines.

[0031] According to some embodiments, the capacity of the energy storage power station 200 is 20MW / 20MWh, and it is connected to the regional power grid 100 through a 10kV transmission line. The technical parameters of the energy storage power station 200 include the converter PCS overload capacity, rated power, rated storage capacity and storage duration, and the rated active power regulation range of the energy storage power station 200 is between -20MW and 20MW.

[0032] According to some embodiments, the regional power grid 100 is connected to the main grid 300 via a 110 kV tie line 600 to transmit on-grid power to the main grid 300 or receive off-grid power from the main grid 300. When the regional power grid 100 is in a steady-state operation state, the transmission power of the tie line 600 is between -30 MW and 30 MW.

[0033] According to some embodiments, the wind farm 400 and the photovoltaic power station 500 are respectively connected to the regional power grid 100 through a 35 kV transmission line to transmit wind power generation and photovoltaic power generation to the regional power grid 100. The installed capacity of the wind farm 400 is 70 MW, and the capacity of the photovoltaic power station 500 is 20 MW.

[0034] Figure 2 A flow chart showing an operation control method of a grid-connected energy storage power station under multiple time scales according to an example embodiment of the present application is shown.

[0035] like Figure 2 As shown, in step S100 , the operation control device determines the operation state of the regional power grid.

[0036] For example, in step S100, the operation control device determines the operation status of the regional power grid through the monitored operation data of the regional power grid.

[0037] The operation control device monitors the operation data of the regional power grid in real time through pre-set monitoring equipment, and determines the operation status of the regional power grid based on this.

[0038] According to some embodiments, the operation state of the regional power grid includes a steady-state operation state, a fault disturbance state, and a post-disturbance recovery state.

[0039] For example, when the frequency of the regional power grid is offset from the rated frequency within ±0.2 Hz and the voltage fluctuates within a preset safety range, the operation control device can determine that the regional power grid is in a steady-state operation state.

[0040] For another example, when the interconnection line between the regional power grid and the main grid is disconnected due to tower collapse or a ground fault causing the line protection to trip, the frequency of the regional power grid is disturbed due to the fault, and its deviation from the rated frequency is large. At this time, the operation control device can determine that the regional power grid is in a fault disturbance state.

[0041] Further, after the disturbance ends, the regional power grid enters a post-disturbance recovery state.

[0042] In step S200, the operation control device sets control rules for the energy storage power station corresponding to the operation state.

[0043] For example, in step S200, the operation control device sets control rules for the energy storage power station corresponding to different operation states of the regional power grid.

[0044] The operation control device first sets the operation time scale of the control rule of the energy storage power station to determine the operation response time of the control rule.

[0045] According to some embodiments, the operating time scale of the control rules corresponding to the stable operating state is long-term, the operating time scale of the control rules corresponding to the fault disturbance state is seconds, and the operating time scale of the control rules corresponding to the post-disturbance recovery state is minutes.

[0046] Furthermore, the operation control device sets the priority of the control rules of the energy storage power station to determine the operation priority order of the control rules.

[0047] According to some embodiments, the control rules corresponding to the fault disturbance state have the highest priority, followed by the control rules corresponding to the post-disturbance recovery state, and the control rules corresponding to the stable operation state have the lowest priority.

[0048] Based on the operation time scale and priority of the control rules, the operation control device sets the control rules of the energy storage power station when the regional power grid is in different states.

[0049] When the regional power grid is in a steady-state operation state, the operation control device obtains the tie line power between the regional power grid and the main grid based on the data obtained by real-time monitoring, and adjusts the power of the energy storage power station by judging whether the tie line power is within the preset rated operation range. The tie line power includes the on-grid power transmitted from the regional power grid to the main grid, and the off-grid power transmitted from the main grid to the regional power grid.

[0050] According to some embodiments, when the interconnection line power is within the rated operating range and the regional power grid does not participate in the electricity market, the operation control device obtains the charging and discharging instructions of the dispatching system, and adjusts the output power of the energy storage power station according to the charging and discharging instructions to charge or discharge the energy storage power station.

[0051] For example, the operation control device can arrange the discharge of the energy storage power station during the peak electricity demand period from 7:00 to 9:00 in the morning according to the charge and discharge instructions, and arrange the charging of the energy storage power station during the low electricity demand period from 11:00 to 13:00 in the afternoon.

[0052] According to some embodiments, when the interconnection line power is within the rated operating range and the regional power grid participates in the electricity market, the operation control device directly adjusts the output power of the energy storage power station according to a preset market plan clearing scheme to charge or discharge the energy storage power station.

[0053] According to some embodiments, during the period when the power transmitted by the wind farm and photovoltaic power station to the regional power grid is greater than the load demand of the regional power grid, it is necessary to control the regional power grid to transmit the online power to the main grid. When the online power exceeds the rated operating range, the operation control device no longer obtains the charge and discharge instructions, directly reduces the discharge power of the energy storage power station or switches the energy storage power station to the charging state, and adjusts the online power back to the rated operating range.

[0054] According to some embodiments, when the power transmitted by the wind farm and photovoltaic power station to the regional power grid is zero and the load demand of the regional power grid is large, the off-grid power needs to be transmitted to the regional power grid through the main grid. When the off-grid power exceeds the rated operating range, the operation control device no longer obtains the charge and discharge instructions, directly increases the discharge power of the energy storage power station or switches the energy storage power station to the discharge state, and adjusts the off-grid power back to the rated operating range.

[0055] According to some embodiments, if the online power or offline power still exceeds the rated operating range after adjustment, the operation control device further adjusts the wind farm and / or photovoltaic power station through measures such as fast power control, load regulation and machine cutting.

[0056] When the regional power grid is in a fault disturbance state, the operation control device obtains the frequency offset of the frequency of the regional power grid relative to the rated frequency based on data obtained by real-time monitoring.

[0057] When the frequency offset exceeds a preset first threshold range, the operation control device controls the energy storage power station to perform a frequency modulation on the regional power grid so that the frequency offset falls back to within the first threshold range.

[0058] According to some embodiments, assuming that the power change of the energy storage power station in performing a frequency modulation is ΔP, ΔP can be expressed by the following formula:

[0059] , (1)

[0060] in, is the primary frequency modulation coefficient, is the frequency offset, is the rated frequency, is the rated power. The upper and lower limits of the primary frequency regulation of the energy storage power station are . The value range is 50 to 200.

[0061] The operation control device obtains a preset first threshold range .in, It can be adjusted according to the actual application scenario, for example, 0.05Hz.

[0062] According to some embodiments, when the frequency of the regional power grid is higher than In the case of the fault, the operation control device first determines the state of the energy storage power station before the fault. If the energy storage power station is in a charging state before the fault, the operation control device will adjust the frequency coefficient once. Increase the charging power of the energy storage station. If the energy storage station was in a discharging state before the fault, the operation control device will adjust the frequency by a factor of one. Reduce the discharge power of the energy storage power station. If the energy storage power station is in standby mode before the failure, the operation control device will adjust the frequency coefficient once. Start charging the energy storage power station.

[0063] According to some embodiments, when the frequency of the regional power grid is lower than In the case of the fault, the operation control device first determines the state of the energy storage power station before the fault. If the energy storage power station is in a charging state before the fault, the operation control device will adjust the frequency coefficient according to the primary frequency modulation coefficient. Reduce the charging power of the energy storage station. If the energy storage station was in a discharging state before the fault, the operation control device will adjust the frequency coefficient once. Increase the discharge power of the energy storage power station. If the energy storage power station is in standby mode before the failure, the operation control device will adjust the frequency coefficient once. Start discharging the energy storage power station.

[0064] When the frequency has been adjusted once and the frequency offset exceeds the preset second threshold range, the regional power grid is urgently adjusted through the overload capacity of the energy storage power station to make the frequency offset fall back to the second threshold range.

[0065] According to some embodiments, the operation control device obtains a preset second threshold range .in, It can be adjusted according to the actual application scenario, for example, 0.5Hz.

[0066] According to some embodiments, when the frequency of the regional power grid is higher than In the case of the above, the operation control device controls the energy storage power station to adjust the frequency of the regional power grid once, so that the frequency deviation falls back to the first threshold range. If the frequency of the regional power grid continues to deviate and exceed , the operation control device starts emergency frequency regulation of the regional power grid through the overload capacity of the energy storage power station.

[0067] According to some embodiments, when the frequency of the regional power grid is lower than In the case of the above, the operation control device controls the energy storage power station to adjust the frequency of the regional power grid once, so that the frequency deviation falls back to the first threshold range. If the frequency of the regional power grid continues to deviate and is lower than , the operation control device starts emergency frequency regulation of the regional power grid through the overload capacity of the energy storage power station.

[0068] According to some embodiments, during the emergency frequency regulation, the power change of the energy storage power station for one frequency regulation is ΔP, which can be expressed by the following formula:

[0069] , (2)

[0070] in, is the primary frequency modulation coefficient, is the overload multiple of the energy storage power station, is the frequency offset, is the rated frequency, is the rated power. The upper and lower limits of the power of the primary frequency regulation of the energy storage power station in emergency frequency regulation are .

[0071] According to some embodiments, the overload capacity of the energy storage power station lasts for different durations at different overload multiples. When emergency frequency regulation is performed, the operation control device controls the energy storage power station to adjust the frequency of the regional power grid according to the maximum overload capacity. When the maximum overload duration is reached but the frequency deviation of the regional power grid has not yet recovered to within the second threshold range, the operation control device reduces the overload multiple and continues to maintain the overload output of the energy storage power station.

[0072] For example, Figure 3 As shown, it is assumed that the energy storage power station can achieve overload output of 3 times the rated active power regulation range for 10 seconds, 1.5 times the rated active power regulation range for 60 seconds, and 1.2 times the rated active power regulation range for half an hour. When emergency frequency regulation is performed, the maximum active power regulation range of the energy storage power station is 3 times the rated active power regulation range, that is, between -60MW and 60MW. After the overload output of the maximum active power regulation range is maintained for 10 seconds, the operation control device controls the energy storage power station to enter the 1.5 times rated active power regulation range limit. Similarly, after the frequency offset of the regional power grid recovers to within the second threshold range, the operation control device controls the energy storage power station to adjust within the rated active power regulation range.

[0073] According to some embodiments, after the frequency offset of the regional power grid is restored to within a first threshold range, the operation control device controls the energy storage power station to exit the primary frequency regulation.

[0074] When the regional power grid is in a post-disturbance recovery state, the operation control device controls the power output of the energy storage power station according to the automatic control instructions of the regional power grid.

[0075] According to some embodiments, after the energy storage power station exits the primary frequency modulation and a preset delay period has passed, the operation control device begins to receive automatic control instructions from the regional power grid to perform power regulation of the energy storage power station. At this time, the regional power grid enters a post-disturbance recovery state.

[0076] According to some embodiments, the automatic control instruction may be obtained through AGC (Automatic Generation Control) or AVC (Automatic Voltage Control) of the regional power grid.

[0077] In step S300 , the operation control device executes the control rule to adjust the frequency of the regional power grid through the power of the energy storage power station.

[0078] When the regional power grid is in different operating states, the operation control device executes the control rules of the energy storage power station corresponding to the different operating states according to the priority of the control rules to control the power output of the energy storage power station, thereby adjusting the frequency of the regional power grid.

[0079] According to the embodiments of the present application, it is possible to adjust the frequency of the regional power grid by changing the power of the grid-type energy storage power station at different time scales, give play to the regulating role of the grid-type energy storage power station, and maintain the stability of the grid operation.

[0080] Figure 4 A block diagram of an operation control device of a grid-type energy storage power station under multiple time scales according to an example embodiment of the present application is shown.

[0081] like Figure 4 As shown, the operation control device 700 includes an information acquisition module 710 , a rule setting module 720 and an execution module 730 .

[0082] The information acquisition module 710 monitors the operation data of the regional power grid in real time through pre-set monitoring equipment, and determines the operation status of the regional power grid based on this.

[0083] The rule setting module 720 sets the operating time scale of the control rule of the energy storage power station to determine the operating response time of the control rule.

[0084] The rule setting module 720 sets the priority of the control rules of the energy storage power station to determine the operation priority of the control rules.

[0085] Based on the operation time scale and priority of the control rules, the rule setting module 720 sets the control rules for the energy storage power station when the regional power grid is in different states.

[0086] When the regional power grid is in different operating states, the execution module 730 executes the control rules of the energy storage power station corresponding to the different operating states according to the priority of the control rules to control the power output of the energy storage power station, thereby adjusting the frequency of the regional power grid.

[0087] Figure 5 A block diagram of an electronic device according to an exemplary embodiment of the present application is shown.

[0088] like Figure 5 As shown, the electronic device 800 is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0089] like Figure 5 As shown, the electronic device 800 is in the form of a general-purpose computing device. The components of the electronic device 800 may include, but are not limited to: at least one processing unit 810, at least one storage unit 820, a bus 830 connecting different system components (including the storage unit 820 and the processing unit 810), a display unit 840, etc. The storage unit stores program codes, which can be executed by the processing unit 810, so that the processing unit 810 executes the methods described in this specification according to various exemplary embodiments of the present application. For example, the processing unit 810 may execute the following: Figure 2 The method shown in .

[0090] The storage unit 820 may include a readable medium in the form of a volatile storage unit, such as a random access storage unit (RAM) 8201 and / or a cache storage unit 8202 , and may further include a read-only storage unit (ROM) 8203 .

[0091] The storage unit 820 may also include a program / utility 8204 having a set (at least one) of program modules 8205, such program modules 8205 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.

[0092] Bus 830 may represent one or more of several types of bus structures, including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

[0093] The electronic device 800 may also communicate with one or more external devices 900 (e.g., keyboards, pointing devices, Bluetooth devices, etc.), may also communicate with one or more devices that enable a user to interact with the electronic device 800, and / or may communicate with any device that enables the electronic device 800 to communicate with one or more other computing devices (e.g., routers, modems, etc.). Such communication may be performed via an input / output (I / O) interface 850. In addition, the electronic device 800 may also communicate with one or more networks (e.g., local area networks (LANs), wide area networks (WANs), and / or public networks, such as the Internet) via a network adapter 860. The network adapter 860 may communicate with other modules of the electronic device 800 via a bus 830. It should be understood that, although not shown in the figure, other hardware and / or software modules may be used in conjunction with the electronic device 800, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, etc.

[0094] Through the description of the above implementation methods, it is easy for those skilled in the art to understand that the example embodiments described here can be implemented by software, or by combining software with necessary hardware. The technical solution according to the embodiment of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, including several instructions to enable a computing device (which can be a personal computer, a server, a mobile terminal or a network device, etc.) to execute the method according to the embodiment of the present application.

[0095] The software product can adopt any combination of one or more readable media. The readable medium can be a readable signal medium or a readable storage medium. The readable storage medium can be, for example, but not limited to, a system, device or device of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0096] Computer readable storage media may include data signals propagated in baseband or as part of a carrier wave, wherein readable program codes are carried. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. The readable storage medium may also be any readable medium other than a readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, device, or device. The program codes contained on the readable storage medium may be transmitted using any suitable medium, including but not limited to wireless, wired, optical cable, RF, etc., or any suitable combination thereof.

[0097] Program code for performing the operations of the present application may be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java, C++, etc., and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as a separate software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., using an Internet service provider to connect through the Internet).

[0098] The computer-readable medium carries one or more programs. When the one or more programs are executed by a device, the computer-readable medium implements the aforementioned functions.

[0099] Those skilled in the art will appreciate that the above modules can be distributed in the device according to the description of the embodiment, or can be changed accordingly and only used in one or more devices different from the embodiment. The modules of the above embodiments can be combined into one module, or further divided into multiple sub-modules.

[0100] The embodiments of the present application are described in detail above, and the description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, changes or deformations made by those skilled in the art based on the idea of ​​the present application, the specific implementation method and the scope of application of the present application, all belong to the scope of protection of the present application. In summary, the content of this specification should not be construed as limiting the present application.

Claims

1. An operation control method of a grid-type energy storage power station under multiple time scales, characterized in that: include: Determining the operating state of the regional power grid, wherein the operating state includes a steady-state operating state, a fault disturbance state, and a post-disturbance recovery state; Setting control rules of the energy storage power station corresponding to the operating state includes: Setting the operation time scale of the control rule, wherein the operation time scale of the control rule corresponding to the steady-state operation state is long-term, the operation time scale of the control rule corresponding to the fault disturbance state is seconds, and the operation time scale of the control rule corresponding to the post-disturbance recovery state is minutes; Setting the priority of the control rule, wherein the priorities of the control rules are, from high to low, the control rule corresponding to the fault disturbance state, the control rule corresponding to the post-disturbance recovery state, and the control rule corresponding to the steady-state operation state; Executing the control rule to adjust the frequency of the regional power grid by the power of the energy storage power station includes: The control rules are executed according to their priorities to control the power of the energy storage power station.

2. The method according to claim 1, characterized in that Setting a control rule of the energy storage power station corresponding to the operating state also includes: When the regional power grid is in the steady-state operation state, obtaining the tie line power between the regional power grid and the main grid; Determining whether the tie line power is within a preset rated operating range; The power of the energy storage power station is adjusted according to the determined result.

3. The method according to claim 2, characterized in that Adjusting the power of the energy storage power station according to the determined result includes: When the tie line power is within the rated operating range, obtaining a charge and discharge scheduling instruction to adjust the output power of the energy storage power station according to the charge and discharge scheduling instruction; When the tie line power exceeds the rated operating range, the power or the charging and discharging state of the energy storage power station is controlled to adjust the tie line power back to within the rated operating range.

4. The method according to claim 1, characterized in that: Setting a control rule of the energy storage power station corresponding to the operating state also includes: When the regional power grid is in the fault disturbance state, obtaining a frequency offset of the frequency of the regional power grid relative to a rated frequency; When the frequency offset exceeds a preset first threshold range, controlling the energy storage power station to perform a frequency modulation on the regional power grid so that the frequency offset falls back to within the first threshold range; When the frequency has been adjusted once and the frequency offset exceeds a preset second threshold range, emergency frequency adjustment is performed on the regional power grid through the overload capacity of the energy storage power station to make the frequency offset fall back to within the second threshold range.

5. The method according to claim 1, characterized in that Setting a control rule of the energy storage power station corresponding to the operating state also includes: When the regional power grid is in the post-disturbance recovery state, obtaining an automatic control instruction of the regional power grid; According to the automatic control instruction, the power of the energy storage power station is controlled.

6. An operation control device for a grid-type energy storage power station under multiple time scales, characterized in that: include: An information acquisition module, used to determine the operating state of the regional power grid, wherein the operating state includes a steady-state operating state, a fault disturbance state, and a post-disturbance recovery state; A rule setting module, used to set the control rules of the energy storage power station corresponding to the operating state, including: Setting the operation time scale of the control rule, wherein the operation time scale of the control rule corresponding to the steady-state operation state is long-term, the operation time scale of the control rule corresponding to the fault disturbance state is seconds, and the operation time scale of the control rule corresponding to the post-disturbance recovery state is minutes; Setting the priority of the control rule, wherein the priorities of the control rules are, from high to low, the control rule corresponding to the fault disturbance state, the control rule corresponding to the post-disturbance recovery state, and the control rule corresponding to the steady-state operation state; An execution module, used for executing the control rule to adjust the frequency of the regional power grid through the power of the energy storage power station, includes: The control rules are executed according to their priorities to control the power of the energy storage power station.

7. An electronic device, characterized in that: include: one or more processors; A storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the method according to any one of claims 1 to 5.

8. A computer-readable storage medium having a computer program or instruction stored thereon, characterized in that: When the computer program or instruction is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

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