Method and device for coordinated ac-dc stability control

Abstract

The application discloses an AC-DC coordinated stability control method and device. The method comprises the following steps: when detecting that an AC-DC fault occurs in a target power grid, determining the fault type of the AC-DC fault; sending the fault type to a target AC-DC control master station, so that the target AC-DC control master station determines an AC-DC control strategy according to the fault type; after receiving the AC-DC control strategy fed back by the target AC-DC control master station, generating an AC-DC control instruction according to the AC-DC control strategy; sending the AC-DC control instruction to the target control master station, sending the AC-DC control instruction to a target AC-DC execution station by the target control master station, and executing the AC-DC control instruction by the target AC-DC execution station. The application solves the technical problem that, in the related art, after an AC-DC fault occurs in a power grid, especially after multiple AC-DC faults, effective measures cannot be taken for processing, thereby leading to poor stability of the power grid.

Description

Technical Field

[0001] The present invention relates to the field of power grid safety technology, and in particular to an AC / DC coordinated stability control method and device. Background Art

[0002] Safety and stability control is a crucial means of ensuring safe and stable operation of power grids after severe faults. However, with the rapid development of AC / DC transmission technology, power grids have become hybrid AC / DC structures. The impact of AC / DC faults on the grid is becoming increasingly complex and extensive, leading to issues such as multiple stability control objects after a single fault, coupling of stability control objects after different faults, and inconsistent control commands for the same control object.

[0003] Currently, safety and stability control systems are designed only for local stability issues. Stability issues following AC / DC faults are relatively simple, with a narrow impact range. The control targets required are limited, and the stability control system architecture and functions are simple. Effective measures are still not available to address complex, multiple, and severe AC / DC faults.

[0004] To address the above-mentioned problems, no effective solutions have been proposed so far. Summary of the Invention

[0005] The embodiments of the present invention provide an AC / DC coordinated stability control method and device to at least solve the technical problem in related technologies that after AC / DC faults occur in the power grid, especially multiple AC / DC faults, effective measures cannot be taken to handle them, resulting in poor power grid stability.

[0006] According to one aspect of an embodiment of the present invention, there is provided an AC / DC coordinated stability control method, comprising: upon detecting an AC / DC fault in a target power grid, determining the fault type of the AC / DC fault, wherein the target power grid is a power grid requiring AC / DC fault monitoring; sending the fault type to a target AC / DC control master station, so that the target AC / DC control master station determines an AC / DC control strategy according to the fault type; after receiving the AC / DC control strategy fed back by the target AC / DC control master station, generating an AC / DC control instruction according to the AC / DC control strategy; sending the AC / DC control command to the target control master station, using the target control master station to send the AC / DC control instruction to a target AC / DC execution station, and using the target AC / DC execution station to execute the AC / DC control instruction, wherein the target control master station is a control master station connected to a target AC / DC execution station, and the target AC / DC execution station is an execution station indicated in the AC / DC control strategy.

[0007] Optionally, the fault type is sent to a target AC / DC control master station so that the target AC / DC control master station determines an AC / DC control strategy according to the fault type, including: when the fault type is an AC fault, the target AC / DC control master station is a target AC control master station, and the AC / DC control strategy is determined by the target AC control master station according to AC fault information corresponding to the AC fault; when the fault type is a DC fault, the target AC / DC control master station is a target DC control master station, and the AC / DC control strategy is determined by the target DC control master station according to DC fault information corresponding to the DC fault.

[0008] Optionally, before sending the fault type to the target AC / DC control master station so that the target AC / DC control master station can determine the AC / DC control strategy according to the fault type, the AC / DC coordinated stability control method further includes: obtaining the grid topology of the target power grid; determining all possible fault types that may occur in the grid topology; generating a fault control strategy for each of all the fault types; generating a fault type / control strategy mapping relationship between all the fault types and the fault control strategy; and saving the fault type / control strategy mapping relationship.

[0009] Optionally, after sending the AC / DC control command to the target control master station, using the target control master station to send the AC / DC control instruction to the target AC / DC execution station, and using the target AC / DC execution station to execute the AC / DC control instruction, the AC / DC coordinated stability control method further includes: when a new AC / DC fault is detected in the target power grid within a predetermined time period, obtaining a new AC / DC control strategy sent by a new target AC / DC control master station; and generating a new AC / DC control instruction according to the AC / DC control strategy and the new AC / DC control strategy.

[0010] Optionally, generating a new AC / DC control instruction according to the AC / DC control strategy and the new AC / DC control strategy includes: when the execution station one indicated in the AC / DC control strategy and the execution station two indicated in the new AC / DC control strategy are different execution stations, generating the new AC / DC control instruction with the execution station two as the target execution station; when the AC / DC control strategy and the new AC / DC control strategy are the same control strategy sent by the same control master station, generating the new AC / DC control instruction according to the control strategy with the larger to-be-processed capacity carried in the AC / DC control strategy and the new AC / DC control strategy; when the AC / DC control strategy and the new AC / DC control strategy are the same control strategy sent by different control master stations, generating the new AC / DC control instruction according to the sum of the to-be-processed capacities carried in the AC / DC control strategy and the new AC / DC control strategy; when the AC / DC control strategy and the new AC / DC control strategy are different control strategies sent by different control master stations, generating the new AC / DC control instruction according to the new AC / DC control strategy.

[0011] Optionally, detecting that an AC or DC fault has occurred in a target power grid includes: obtaining current information one of a DC control and protection system through a DC control master station, and when fault information is carried in the current information one, determining that a DC fault has occurred in the target power grid, wherein the current information one includes at least: DC scalable data, retractable control quantity data, and DC fault information; obtaining current information two of an AC execution station through an AC control master station, and when fault information is carried in the current information two, determining that a DC fault has occurred in the target power grid, wherein the current information two includes at least: AC controllable quantity information.

[0012] Optionally, the DC control master station calculates AC control instructions, DC boost data, and reversible control commands based on the DC fault information; the AC control master station calculates AC control instructions, DC boost data, and reversible control commands based on the AC fault information.

[0013] According to another aspect of an embodiment of the present invention, an AC / DC coordinated stability control device is also provided, comprising: a first determination module, configured to determine the fault type of the AC / DC fault when an AC / DC fault is detected in a target power grid, wherein the target power grid is a power grid that requires AC / DC fault monitoring; a first sending module, configured to send the fault type to a target AC / DC control master station, so that the target AC / DC control master station determines an AC / DC control strategy according to the fault type; a third processing module, configured to generate an AC / DC control instruction according to the AC / DC control strategy after receiving the AC / DC control strategy fed back by the target AC / DC control master station; a second sending module, configured to send the AC / DC control command to the target control master station, use the target control master station to send the AC / DC control instruction to a target AC / DC execution station, and use the target AC / DC execution station to execute the AC / DC control instruction, wherein the target control master station is a control master station connected to a target AC / DC execution station, and the target AC / DC execution station is an execution station indicated in the AC / DC control strategy.

[0014] Optionally, the first sending module includes: a first determination unit, used to, when the fault type is an AC fault, the target AC / DC control master station is the target AC control master station, and determine the AC / DC control strategy through the target AC control master station according to the AC fault information corresponding to the AC fault; a second determination unit, used to, when the fault type is a DC fault, the target AC / DC control master station is the target DC control master station, and determine the AC / DC control strategy through the target DC control master station according to the DC fault information corresponding to the DC fault.

[0015] Optionally, the AC / DC coordinated stability control device further includes: a first acquisition module, used to acquire the grid topology of the target grid; a second determination module, used to determine all possible fault types that may occur in the grid topology; a first processing module, used to generate a fault control strategy for each of all the fault types; a second processing module, used to generate a fault type / control strategy mapping relationship between all the fault types and the fault control strategy; and a saving module, used to save the fault type / control strategy mapping relationship.

[0016] Optionally, the AC / DC coordinated stability control device further includes: a second acquisition module, configured to acquire a new AC / DC control strategy sent by a new target AC / DC control master station when a new AC / DC fault is detected in the target power grid within a predetermined time period; and a fourth processing module, configured to generate a new AC / DC control instruction based on the AC / DC control strategy and the new AC / DC control strategy.

[0017] Optionally, the fourth processing module includes: a first processing unit, used to generate the new AC / DC control instruction with the execution station 2 as the target execution station when the execution station 1 indicated in the AC / DC control strategy and the execution station 2 indicated in the new AC / DC control strategy are different execution stations; a second processing unit, used to generate the new AC / DC control instruction according to the control strategy with a larger to-be-processed capacity carried in the AC / DC control strategy and the new AC / DC control strategy when the AC / DC control strategy and the new AC / DC control strategy are the same control strategy sent by the same control master station; a third processing unit, used to generate the new AC / DC control instruction according to the sum of the to-be-processed capacities carried in the AC / DC control strategy and the new AC / DC control strategy when the AC / DC control strategy and the new AC / DC control strategy are the same control strategy sent by different control master stations; and a fourth processing unit, used to generate the new AC / DC control instruction according to the new AC / DC control strategy when the AC / DC control strategy and the new AC / DC control strategy are different control strategies sent by different control master stations.

[0018] Optionally, the first determination module includes: a third determination unit, used to obtain current information 1 of the DC control and protection system through the DC control master station, and when the current information 1 carries fault information, determine that a DC fault has occurred in the target power grid, wherein the current information 1 at least includes: DC scalable data, retractable control quantity data and DC fault information; a fourth determination unit, used to obtain current information 2 of the AC execution station through the AC control master station, and when the current information 2 carries fault information, determine that a DC fault has occurred in the target power grid, wherein the current information 2 at least includes: AC controllable quantity information.

[0019] Optionally, the DC control master station calculates AC control instructions, DC boost data, and reversible control commands based on the DC fault information; the AC control master station calculates AC control instructions, DC boost data, and reversible control commands based on the AC fault information.

[0020] According to another aspect of an embodiment of the present invention, an AC / DC coordinated stability control system is provided. The AC / DC coordinated stability control system uses any one of the above-mentioned AC / DC coordinated stability control methods.

[0021] According to another aspect of an embodiment of the present invention, a computer program product is provided, comprising computer instructions, which, when executed by a processor, execute any one of the above-mentioned AC / DC coordinated stability control methods.

[0022] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium includes a stored program, wherein the program executes any one of the above-mentioned AC / DC coordinated stability control methods.

[0023] According to another aspect of an embodiment of the present invention, a processor is further provided, wherein the processor is configured to run a program, wherein the program executes any one of the above-mentioned AC / DC coordinated stability control methods when running.

[0024] In an embodiment of the present invention, when an AC / DC fault is detected in a target power grid, the fault type of the AC / DC fault is determined, wherein the target power grid is a power grid that requires AC / DC fault monitoring; the fault type is sent to a target AC / DC control master station so that the target AC / DC control master station can determine an AC / DC control strategy according to the fault type; after receiving the AC / DC control strategy fed back by the target AC / DC control master station, an AC / DC control instruction is generated according to the AC / DC control strategy; the AC / DC control command is sent to the target control master station, the target control master station is used to send the AC / DC control instruction to the target AC / DC execution station, and the target AC / DC execution station is used to execute the AC / DC control instruction, wherein the target control master station is a control master station connected to the target AC / DC execution station, and the target AC / DC execution station is an execution station indicated in the AC / DC control strategy. Through the above-mentioned technical solution provided by the present invention, the purpose of quickly and accurately determining the AC / DC fault type under different target power grid structures, fault triggering times and fault types, and generating corresponding stable control strategies and control commands according to the fault type is achieved. In addition, information sharing and collaborative work between the control master station and the execution station improve the fault handling efficiency of the AC / DC system and the stability of the system, thereby realizing that the system can quickly identify AC / DC faults, intelligently generate control strategies and accurately execute control instructions, enhance the system's adaptability, achieve the technical effect of improving the stability and reliability of the power grid, and also reduce manpower and maintenance costs, thereby solving the technical problem in the related technology that after AC / DC faults occur in the power grid, especially after multiple AC / DC faults, effective measures cannot be taken to deal with them, resulting in poor power grid stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 This is a hardware structure block diagram of a mobile terminal for an AC / DC coordinated stability control method according to an embodiment of the present invention;

[0027] Figure 2is a flow chart of an AC / DC coordinated stability control method according to an embodiment of the present invention;

[0028] Figure 3 is an architecture diagram of an AC / DC coordinated stability control system for coping with multiple faults according to an embodiment of the present invention;

[0029] Figure 4 is a flow chart of an AC / DC coordinated stability control system according to an embodiment of the present invention;

[0030] Figure 5 is a power grid structure diagram according to an embodiment of the present invention;

[0031] Figure 6 This is an architecture diagram of an optional AC / DC coordinated stability control system for coping with multiple faults according to an embodiment of the present invention;

[0032] Figure 7 2 is a schematic diagram of an AC / DC coordinated stability control device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0034] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. 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 necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] As described in the background, related technologies address the technical problem of a failure to implement effective measures to address AC / DC faults, particularly multiple AC / DC faults, in a power grid, leading to deteriorated power grid stability. To address these shortcomings, embodiments of the present invention provide an AC / DC coordinated stability control method and apparatus, an AC / DC coordinated stability control system, a computer-readable storage medium, a processor, and a computer program product.

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0037] The method embodiments provided in the embodiments of the present invention can be executed in a mobile terminal, a computer terminal or a similar computing device. Taking running on a mobile terminal as an example, Figure 1 This is a hardware structure block diagram of a mobile terminal of an AC / DC coordinated stability control method according to an embodiment of the present invention. Figure 1 As shown, the mobile terminal may include one or more ( Figure 1 Only one is shown) a processor 102 (the processor 102 may include but is not limited to a microprocessor MCU or a programmable logic device FPGA and other processing devices) and a memory 104 for storing data, wherein the mobile terminal may also include a transmission device 106 and an input and output device 108 for communication functions. It will be understood by those skilled in the art that Figure 1 The structure shown is only for illustration and does not limit the structure of the mobile terminal. Figure 1 More or fewer components than shown, or with Figure 1 Different configurations shown.

[0038] The memory 104 can be used to store computer programs, such as application software programs and modules, such as the computer program corresponding to the AC / DC coordinated stability control method in the embodiments of the present invention. The processor 102 executes the computer programs stored in the memory 104 to execute various functional applications and data processing, thereby implementing the aforementioned method. The memory 104 may include high-speed random access memory (RAM) and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory remote from the processor 102, which can be connected to the mobile terminal via a network. Examples of such networks include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof. The transmission device 106 is used to receive or transmit data via a network. Specific examples of such networks may include a wireless network provided by the mobile terminal's telecommunications provider. In one example, the transmission device 106 includes a network interface controller (NIC), which can be connected to other network devices via a base station to enable communication with the Internet. In one example, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0039] According to an embodiment of the present invention, a method embodiment of an AC / DC coordinated stability control method is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0040] Figure 2 FIG. 1 is a flow chart of an AC / DC coordinated stability control method according to an embodiment of the present invention. Figure 2 As shown, the method includes the following steps:

[0041] Step S202, when an AC / DC fault is detected in a target power grid, determining the fault type of the AC / DC fault, wherein the target power grid is a power grid requiring AC / DC fault monitoring;

[0042] Optionally, the target power grid may include: a power grid system of a city, a region, a country, etc.

[0043] Optionally, the AC / DC fault refers to a fault in the power system caused by a sudden change in current direction or inconsistent frequency due to equipment failure or other reasons.

[0044] Optionally, the above fault types may include: AC fault, DC fault, and mixed AC / DC fault.

[0045] In this embodiment, the fault type of the AC or DC fault occurring in the target power grid can be detected and determined, which facilitates subsequent fault processing.

[0046] Step S204: sending the fault type to the target AC / DC control master station so that the target AC / DC control master station can determine the AC / DC control strategy according to the fault type;

[0047] Figure 3 is a system architecture diagram of an AC / DC coordinated stability control system according to an embodiment of the present invention. Figure 3 As shown, the AC information stations (AC information station 11, AC information station n1) and the DC control and protection systems (DC control and protection system 1, DC control and protection system 2, ..., DC control and protection system n) transmit AC and DC fault information to the corresponding AC and DC control master stations (AC control master station 1 ..., AC control master station n, DC control master station 1, DC control master station 2, ..., DC control master station n). The AC and DC fault information is then transmitted to the AC / DC coordinated control master station via the AC and DC control master stations.

[0048] Optionally, the target AC / DC control master station may include: multiple DC control master stations and multiple AC control master stations.

[0049] Optionally, the AC / DC control strategy may include: fault isolation, adjustment of load distribution of the power grid, and protection of key equipment.

[0050] In this embodiment, the AC / DC control master station can be helped to determine the AC / DC control strategy, which can help improve the efficiency and accuracy of fault handling.

[0051] Step S206: after receiving the AC / DC control strategy fed back by the target AC / DC control master station, generating an AC / DC control instruction according to the AC / DC control strategy;

[0052] Optionally, the AC / DC control instructions may include: DC power increase / decrease control commands and all AC controllable measure quantity information sent to the DC control master station. Furthermore, the instructions may include: AC control measure quantity commands and all DC controllable increase / decrease control quantity information sent to the AC control master station.

[0053] In this embodiment, by generating AC / DC control instructions according to the AC / DC control strategy, the operation and control of the power system can be effectively guided.

[0054] Step S208: Send the AC / DC control command to the target control master station, use the target control master station to send the AC / DC control instruction to the target AC / DC execution station, and use the target AC / DC execution station to execute the AC / DC control instruction, wherein the target control master station is the control master station connected to the target AC / DC execution station, and the target AC / DC execution station is the execution station indicated in the AC / DC control strategy.

[0055] In this embodiment, AC and DC control instructions can be transmitted from the control master station to the execution station and executed by the execution station, thereby coordinating the collaboration between various parts of the control system and enabling timely diagnosis and processing of faults.

[0056] like Figure 3 As shown, the AC / DC coordination master station is connected to the DC control master station, receiving DC boost / reduction control quantity information, AC control quantity commands, and DC power boost / reduction control commands from the DC control master station. It then sends DC power boost / reduction control commands and all AC control quantity information to the DC control master station. It is also connected to the AC control master station, receiving DC boost / reduction control commands from the AC control master station, and sending AC control quantity commands and all DC boost / reduction control quantity information to the AC control master station. The DC control master station obtains DC boost / reduction control quantity information and DC fault information from the DC control and protection system, calculates AC control commands and DC boost / reduction control commands based on the DC fault information, and sends them to the AC / DC coordination control master station. It also receives DC power boost / reduction control commands from the AC / DC coordination master station and forwards them to the DC control and protection system.

[0057] In addition, the AC control master station obtains AC controllable quantity information from the AC execution station and forwards it to the AC / DC coordinated control master station; receives AC fault information from the AC information station, calculates AC control commands and DC boost and drop control commands, and sends them to the AC / DC coordinated control master station.

[0058] As can be seen from the above, in an embodiment of the present invention, when an AC / DC fault is detected in a target power grid, the fault type of the AC / DC fault can be determined, wherein the target power grid is a power grid that requires AC / DC fault monitoring; the fault type is sent to the target AC / DC control master station, so that the target AC / DC control master station can determine the AC / DC control strategy according to the fault type; after receiving the AC / DC control strategy fed back by the target AC / DC control master station, an AC / DC control instruction is generated according to the AC / DC control strategy; the AC / DC control command is sent to the target control master station, the target control master station is used to send the AC / DC control instruction to the target AC / DC execution station, and the target AC / DC execution station is used to execute the AC / DC control instruction, wherein the target control master station is connected to the target AC The DC execution station is connected to the control master station, and the target AC / DC execution station is the execution station indicated in the AC / DC control strategy, which achieves the purpose of quickly and accurately determining the AC / DC fault type under different target grid structures, fault triggering times and fault types, and generating corresponding stable control strategies and control commands according to the fault type. In addition, the information sharing and collaborative work between the control master station and the execution station improve the fault handling efficiency of the AC / DC system and the stability of the system, thereby realizing the system's ability to quickly identify AC / DC faults, intelligently generate control strategies and accurately execute control instructions, enhancing the system's adaptability, and achieving the technical effect of improving the stability and reliability of the power grid, while reducing manpower and maintenance costs.

[0059] The technical solution provided by the embodiment of the present invention solves the technical problem in the related art that after AC and DC faults occur in the power grid, especially multiple AC and DC faults, effective measures cannot be taken to deal with them, resulting in poor power grid stability.

[0060] According to the above embodiment of the present invention, the fault type is sent to the target AC / DC control master station so that the target AC / DC control master station determines the AC / DC control strategy according to the fault type, including: when the fault type is an AC fault, the target AC / DC control master station is the target AC control master station, and the AC / DC control strategy is determined by the target AC control master station according to AC fault information corresponding to the AC fault; when the fault type is a DC fault, the target AC / DC control master station is the target DC control master station, and the AC / DC control strategy is determined by the target DC control master station according to DC fault information corresponding to the DC fault.

[0061] In this embodiment, the target AC / DC control master station can be determined according to the fault type, and the AC / DC control strategy can be determined according to the fault information, which can effectively achieve fault isolation and location.

[0062] like Figure 3As shown, the DC control master station obtains DC fault information from the DC control and protection system and calculates AC control commands and DC boost and drop control commands based on the DC fault information; the AC control master station receives AC fault information from the AC information station and calculates AC control commands and DC boost and drop control commands.

[0063] Figure 4 is a flow chart of an optional AC / DC coordinated stability control method according to an embodiment of the present invention. Figure 4 As shown, the method may include: a first step, detecting whether an AC / DC fault is currently occurring through an AC / DC coordinated stability control system; if an AC / DC fault occurs in the power grid, the second step is initiated; if no AC / DC fault occurs, the method waits for a fault to occur. A second step, if an AC fault occurs in the system, the AC control master station calculates an AC control command and a DC boost / drop control command based on the AC fault information, and sends the command to the AC / DC coordinated control master station; if a DC fault occurs in the system, the DC control master station calculates an AC control command and a DC boost / drop control command based on the DC fault information, and sends the command to the AC / DC coordinated control master station. A third step, the AC / DC coordinated control master station selects the corresponding AC control master station or DC control master station based on the AC control command and DC boost / drop control command received from the DC control master station or the AC control master station, sends the corresponding control command, and executes the corresponding control measures.

[0064] According to the above embodiment of the present invention, before sending the fault type to the target AC / DC control master station for the target AC / DC control master station to determine the AC / DC control strategy according to the fault type, the AC / DC coordinated stability control method also includes: obtaining the grid topology of the target power grid; determining all fault types that may occur in the grid topology; generating a fault control strategy for each of all fault types; generating a fault type / control strategy mapping relationship between all fault types and fault control strategies; and saving the fault type / control strategy mapping relationship.

[0065] In this embodiment, by understanding the grid topology of the target grid, analyzing the components, connection relationships, and operating characteristics of the grid, all possible fault types can be determined, a corresponding fault control strategy can be generated for each fault type, a mapping relationship between the fault type and the fault control strategy can be established, and the mapping relationship between the fault type / control strategy can be saved, thereby providing a basis and support for fault analysis, control, and processing of the target grid, ensuring that the grid can respond promptly and effectively when a fault occurs, and ensuring the safe and stable operation of the grid.

[0066] According to the above embodiment of the present invention, after sending the AC / DC control command to the target control master station, using the target control master station to send the AC / DC control instruction to the target AC / DC execution station, and using the target AC / DC execution station to execute the AC / DC control instruction, the AC / DC coordinated stability control method further includes: when a new AC / DC fault is detected in the target power grid within a predetermined time period, obtaining a new AC / DC control strategy sent by the new target AC / DC control master station; and generating a new AC / DC control instruction based on the AC / DC control strategy and the new AC / DC control strategy.

[0067] In this embodiment, by acquiring a new AC / DC control strategy and generating a new control instruction, it is possible to help respond to new fault conditions in a timely manner and effectively deal with emergencies in power grid operation.

[0068] According to the above embodiment of the present invention, generating a new AC / DC control instruction based on the AC / DC control strategy and the new AC / DC control strategy includes: when the execution station one indicated in the AC / DC control strategy and the execution station two indicated in the new AC / DC control strategy are different execution stations, generating the new AC / DC control instruction with the execution station two as the target execution station; when the AC / DC control strategy and the new AC / DC control strategy are the same control strategy sent by the same control master station, generating the new AC / DC control instruction based on the control strategy with the larger to-be-processed capacity carried in the AC / DC control strategy and the new AC / DC control strategy; when the AC / DC control strategy and the new AC / DC control strategy are the same control strategy sent by different control masters, generating the new AC / DC control instruction based on the sum of the to-be-processed capacities carried in the AC / DC control strategy and the new AC / DC control strategy; when the AC / DC control strategy and the new AC / DC control strategy are different control strategies sent by different control masters, generating the new AC / DC control instruction based on the new AC / DC control strategy.

[0069] In this embodiment, when a new AC / DC fault is detected in the target power grid within a predetermined time period, different control measures are taken according to different situations, thereby effectively handling the new AC / DC fault in the power grid.

[0070] like Figure 4 As shown, the method may further include a fourth step: if another fault occurs within T (i.e., a predetermined time period), and the AC / DC coordination master station receives an AC control command and a DC boost / drop control command from the DC control master station or the AC control master station, different control measures are taken according to the following situations:

[0071] Case 1: When the AC / DC coordination master station receives control commands from different DC or different AC execution stations sent by the control master station, the coordination master station directly forwards the control commands to the corresponding control master station for control.

[0072] Case 2: When the AC / DC coordination master station receives the same DC control command of the same type or the same AC execution station control command sent by the same control master station, the coordination master station sends it to the corresponding control master station for control according to the maximum value of the control capacity.

[0073] Case 3: When the AC / DC coordination master station receives the same DC control command of the same type or the same AC execution station control command from different control master stations, the coordination master station sends the accumulated value of the control capacity of each station to the corresponding control master station for control.

[0074] Case 4: When the AC / DC coordination master station receives different types of control commands for the same DC from different control master stations, only the control type of the first command is executed within time T.

[0075] In addition, it should be noted that if a DC executes a control command of a certain control type (power increase or power reduction) within the time T, the controllable variables of other types sent to other stations will be cleared.

[0076] According to the above embodiment of the present invention, detecting that an AC or DC fault has occurred in a target power grid includes: obtaining current information one of a DC control and protection system through a DC control master station, and determining that a DC fault has occurred in the target power grid when the current information one carries fault information, wherein the current information one includes at least DC scalable data, DC droppable control quantity data, and DC fault information; and obtaining current information two of an AC execution station through an AC control master station, and determining that a DC fault has occurred in the target power grid when the current information two carries fault information, wherein the current information two includes at least AC controllable quantity information.

[0077] Optionally, the current information may include: AC controllable quantity information, flow increase data, flow reduction control quantity data, DC fault information and other information.

[0078] It should be noted that the above current information may include but is not limited to the above content, which will not be repeated here.

[0079] In this embodiment, relevant information can be obtained by acquiring and analyzing the DC control master station and the AC control master station to promptly and accurately determine the fault type of the target power grid, thereby reducing the cost and time of fault handling and effectively reducing the impact of the fault on the power grid.

[0080] In the above embodiment of the present invention, the DC control master station calculates AC control instructions, DC boost data and reversible control commands based on DC fault information; the AC control master station calculates AC control instructions, DC boost data and reversible control commands based on AC fault information.

[0081] In this embodiment, by calculating AC and DC control instructions, DC boost data, and fallback control commands, the DC control master station and the AC control master station can effectively control and adjust the operating status of the power grid according to the fault situation to ensure the safety and stability of the system.

[0082] It should be noted that the above-mentioned DC boost data refers to the parameters used by the control device to adjust the DC voltage. Calculating the correct DC boost data based on the fault information helps to adjust the voltage stability of the power grid; the above-mentioned fallback control command refers to the loop switch action command that the control device should execute. Calculating the fallback control command based on the fault information helps to quickly isolate the faulty part and ensure the normal operation of the power grid.

[0083] like Figure 4 As shown, the method may further include: a fifth step, if no fault occurs within the time T, the system returns to the first step and waits for the occurrence of a power grid accident.

[0084] It should be noted that the above AC / DC coordinated stability control system can be combined with a target power grid to construct a line-responsive AC / DC coordinated stability control system when a fault occurs and a control strategy is determined.

[0085] Figure 5 This is a structural diagram of a power grid according to an embodiment of the present invention. Here, the target power grid structure is as follows: Figure 5 The grid structure shown in the figure is explained. Grid 1 and Grid 2 are connected through DC 1, DC 2, and AC line EF. Grid 2 has AC sites A, B, C, D, and power plants G1 and G2. Site A is connected to power plants G1 and G2, and site B is connected to sites C and D. The existing system has the following stable control strategy:

[0086] Control strategy 1: After DC 1 fails, 500MW of G1 power plant is cut off.

[0087] Control strategy 2: After DC 2 fails, increase the power of DC 1 by 800MW.

[0088] Control strategy 3: After AC line EF fails, increase the power of DC 1 by 500 MW and the power of DC 2 by 500 MW.

[0089] Control Strategy 4: After the AC line BC fails, the DC 2 power is reduced by 1000 MW and the G2 power plant is disconnected by 200 MW.

[0090] Control strategy 5: After the AC line BD fails, the 600MW power of the G2 power plant is removed.

[0091] Figure 6 This is an architecture diagram of an AC / DC coordinated stability control system for coping with multiple faults according to an embodiment of the present invention. Combining the above control strategy, the following can be constructed: Figure 6 In the AC / DC coordinated stability control system shown, the AC / DC coordinated control master station is connected to the AC control master stations A, B, F and the DC control master stations 1 and 2. AC control master station A is connected to AC execution stations G1 and G2, receives information about the switchable units of power plants G1 and G2, and forwards the switch-off commands sent by the coordination master station to the corresponding execution stations for the corresponding unit removal commands. AC control master station B is connected to AC information stations C and D, receives fault information on AC lines BC and BD, calculates AC and DC control commands for strategies 4 and 5, and forwards them to the AC and DC coordination master station for execution. AC control master station F is connected to AC information station E, receives fault information on AC line EF, calculates AC and DC control commands for strategy 3, and forwards them to the AC and DC coordination master station for execution. DC control master stations 1 and 2 are connected to the corresponding DC control and protection systems, receive DC power increase and decrease information and DC fault information sent by them, calculate AC and DC control commands for strategies 1 and 2 based on the DC fault information, and forward them to the AC and DC coordination master station for execution. The AC and DC coordination master station performs coordinated control according to the following situations:

[0092] Case 1: When a DC 1 fault occurs, the DC control master station 1 calculates and removes 500MW of the power of unit G1 according to control strategy 1. After the AC / DC coordinated control master station receives the command to remove 500MW of the power of unit G1, it sends it to the AC execution station G1 through the AC control master station A for execution.

[0093] Scenario 2: When a DC line 1 fault occurs, DC control master station 1 calculates and removes 500 MW of power from unit G1 according to control strategy 1, and executes this through the AC / DC coordination master station. Within time T, a fault occurs on AC line BD. AC control master station B calculates and removes 600 MW of power from unit G2 according to control strategy 5. The AC / DC coordination master station then sends the corresponding command through AC control master station A to AC execution station G2, which executes the command to remove 600 MW of power from unit G2.

[0094] Scenario 3: When AC line BD fails, AC control master station B calculates a 600 MW removal of the G2 power plant according to control strategy 5, which is executed by the AC / DC coordination master station. Within time T, another AC line BC fails. AC control master station B calculates a 1000 MW reduction in DC 2 power according to control strategy 4, removing 200 MW of G2 power plant. When the AC / DC coordination master station receives the command to remove 200 MW of G2 power plant, it does not execute the command because it has already executed the 600 MW removal of G2 power plant. Instead, it executes the 1000 MW reduction in DC 2 power plant.

[0095] Scenario 4: When a DC2 fault occurs, DC control master station 2 calculates a DC1 power increase of 800 MW according to control strategy 2 and executes this through the corresponding DC control master station. Within time T, an AC line EF fault occurs. AC control master station B calculates a DC1 power increase of 500 MW and a DC2 power increase of 500 MW according to control strategy 3 and sends these to the AC / DC coordinated control master station for execution. The AC / DC coordinated control system then determines to increase the DC1 power by an additional 500 MW on top of the 800 MW increase and the DC2 power by 500 MW.

[0096] Scenario 5: When AC line EF fails, AC control master station F calculates a 500 MW increase in DC 1 power and a 500 MW increase in DC 2 power according to control strategy 3, and executes these commands through the corresponding DC control master stations. Within time T, another AC line BC fails. AC control master station B calculates a 1000 MW reduction in DC 2 power according to control strategy 4, removing 200 MW from the G2 power plant. This command is sent to the AC / DC coordinated stability control master station. Because the DC power reduction command is inconsistent with the previous one, execution is discontinued, and only the 200 MW removal of the G2 power plant is executed.

[0097] Case 6: When AC line EF fails, AC control master station F calculates a 500 MW increase in DC 1 power and a 500 MW increase in DC 2 power according to control strategy 3, and executes these commands through the corresponding DC control master stations. After time T, another AC line BC fails. AC control master station B calculates a 1000 MW reduction in DC 2 power and a 200 MW removal of the G2 power plant according to control strategy 4, sending these commands to the AC / DC coordinated stability control master station. This results in a 1000 MW reduction in DC 2 power (ultimately a 500 MW reduction in DC 2 power) and a 200 MW removal of the G2 power plant.

[0098] The technical solution provided by the above-mentioned embodiment of the present invention first detects whether an AC / DC fault has occurred. If a fault has occurred, the AC / DC control master station calculates a corresponding control command based on the AC / DC fault information and sends it to the AC / DC coordinated control master station. Then, a target AC / DC control master station is selected to send a corresponding control command and execute control measures. If the fault occurs again within a predetermined time period and a response is received, corresponding control measures are taken according to different situations. This method comprehensively considers multiple factors such as the power grid structure and the fault type, avoids the problems of the traditional method such as the stable control system architecture, simple functions, and inability to coordinate a wide range of AC / DC control resources, and can flexibly adjust the control strategy to shorten the fault handling time.

[0099] That is, the above technical solution provided by the embodiment of the present invention comprehensively considers multiple factors, adopts appropriate fault detection methods, advanced strategy formulation and coordination methods, improves the fault handling efficiency and overall performance of the AC / DC system, and better coordinates AC / DC control measures under multiple serious faults.

[0100] It should be noted that for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that this application is not limited by the order of the actions described, because according to this application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by this application.

[0101] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus the necessary general hardware platform, and of course it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for enabling a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0102] According to an embodiment of the present invention, there is also provided an AC / DC coordinated stability control device for implementing the above-mentioned AC / DC coordinated stability control method. Figure 7 FIG. 1 is a schematic diagram of an AC / DC coordinated stability control device according to an embodiment of the present invention. Figure 7 As shown, the device includes: a first determining module 701, a first sending module 703, a third processing module 705 and a second sending module 707. The AC / DC coordinated stability control device is described below.

[0103] A first determining module 701 is configured to determine a fault type of an AC / DC fault when an AC / DC fault is detected in a target power grid, wherein the target power grid is a power grid requiring AC / DC fault monitoring;

[0104] A first sending module 703 is configured to send the fault type to a target AC / DC control master station, so that the target AC / DC control master station can determine an AC / DC control strategy according to the fault type;

[0105] The third processing module 705 is configured to generate an AC / DC control instruction according to the AC / DC control strategy after receiving the AC / DC control strategy fed back by the target AC / DC control master station;

[0106] The second sending module 707 is used to send the AC / DC control command to the target control master station, use the target control master station to send the AC / DC control instruction to the target AC / DC execution station, and use the target AC / DC execution station to execute the AC / DC control instruction, wherein the target control master station is the control master station connected to the target AC / DC execution station, and the target AC / DC execution station is the execution station indicated in the AC / DC control strategy.

[0107] It should be noted here that the above-mentioned first determination module 701, first sending module 703, third processing module 705 and second sending module 707 correspond to steps S202 to S208 in the above-mentioned embodiment. The four modules and the corresponding steps have the same instances and application scenarios, but are not limited to the contents disclosed in the above-mentioned embodiment.

[0108] As can be seen from the above, in the scheme recorded in the above embodiment of the present invention, the first determination module can first be used to determine the fault type of the AC / DC fault when an AC / DC fault is detected in the target power grid, wherein the target power grid is a power grid that needs to perform AC / DC fault monitoring; then the first sending module can be used to send the fault type to the target AC / DC control master station, so that the target AC / DC control master station can determine the AC / DC control strategy according to the fault type; then the third processing module can be used to generate AC / DC control instructions according to the AC / DC control strategy after receiving the AC / DC control strategy fed back by the target AC / DC control master station; finally, the second sending module can be used to send the AC / DC control command to the target control master station, and the target control master station can be used to send the AC / DC control instruction to the target AC / DC execution station, and the target AC / DC execution station can be used to execute the AC / DC control command. The station executes AC / DC control instructions, wherein the target control master station is the control master station connected to the target AC / DC execution station, and the target AC / DC execution station is the execution station indicated in the AC / DC control strategy, so as to achieve the purpose of quickly and accurately determining the AC / DC fault type under different target grid structures, fault triggering times and fault types, and generating corresponding stable control strategies and control commands according to the fault type. In addition, the information sharing and collaborative work between the control master station and the execution station improve the fault handling efficiency of the AC / DC system and the stability of the system, thereby realizing the system's ability to quickly identify AC / DC faults, intelligently generate control strategies and accurately execute control instructions, enhance the system's adaptability, and achieve the technical effect of improving the stability and reliability of the power grid, while also reducing manpower and maintenance costs.

[0109] The technical solution provided by the embodiment of the present invention solves the technical problem in the related art that after AC and DC faults occur in the power grid, especially multiple AC and DC faults, effective measures cannot be taken to deal with them, resulting in poor power grid stability.

[0110] In an optional embodiment, the first sending module includes: a first determination unit, which is used to, when the fault type is an AC fault, the target AC / DC control master station is the target AC control master station, and determine the AC / DC control strategy through the target AC control master station according to the AC fault information corresponding to the AC fault; a second determination unit, which is used to, when the fault type is a DC fault, the target AC / DC control master station is the target DC control master station, and determine the AC / DC control strategy through the target DC control master station according to the DC fault information corresponding to the DC fault.

[0111] In an optional embodiment, the AC / DC coordinated stability control device further includes: a first acquisition module for acquiring the grid topology of the target grid; a second determination module for determining all possible fault types that may occur in the grid topology; a first processing module for generating a fault control strategy for each of all fault types; a second processing module for generating a fault type / control strategy mapping relationship between all fault types and fault control strategies; and a saving module for saving the fault type / control strategy mapping relationship.

[0112] In an optional embodiment, the AC / DC coordinated stability control device further includes: a second acquisition module, configured to acquire a new AC / DC control strategy sent by a new target AC / DC control master station when a new AC / DC fault is detected in the target power grid within a predetermined time period; and a fourth processing module, configured to generate a new AC / DC control instruction based on the AC / DC control strategy and the new AC / DC control strategy.

[0113] In an optional embodiment, the fourth processing module includes: a first processing unit, used to generate a new AC / DC control instruction with execution station 2 as the target execution station when the execution station 1 indicated in the AC / DC control strategy and the execution station 2 indicated in the new AC / DC control strategy are different execution stations; a second processing unit, used to generate a new AC / DC control instruction according to the control strategy with a larger to-be-processed capacity carried in the AC / DC control strategy and the new AC / DC control strategy when the AC / DC control strategy and the new AC / DC control strategy are the same control strategy sent by the same control master station; a third processing unit, used to generate a new AC / DC control instruction according to the sum of the to-be-processed capacities carried in the AC / DC control strategy and the new AC / DC control strategy when the AC / DC control strategy and the new AC / DC control strategy are the same control strategy sent by different control master stations; and a fourth processing unit, used to generate a new AC / DC control instruction according to the new AC / DC control strategy when the AC / DC control strategy and the new AC / DC control strategy are different control strategies sent by different control master stations.

[0114] In an optional embodiment, the first determination module includes: a third determination unit, used to obtain current information one of the DC control and protection system through the DC control master station, and when the current information one carries fault information, determine that a DC fault has occurred in the target power grid, wherein the current information one at least includes: DC scalable data, retractable control quantity data and DC fault information; a fourth determination unit, used to obtain current information two of the AC execution station through the AC control master station, and when the current information two carries fault information, determine that a DC fault has occurred in the target power grid, wherein the current information two at least includes: AC controllable quantity information.

[0115] In an optional embodiment, the DC control master station calculates AC control instructions, DC boost data, and reversible control commands based on DC fault information; the AC control master station calculates AC control instructions, DC boost data, and reversible control commands based on AC fault information.

[0116] According to another aspect of an embodiment of the present invention, an AC / DC coordinated stability control system is provided, characterized in that the AC / DC coordinated stability control system uses any one of the above-mentioned AC / DC coordinated stability control methods.

[0117] According to another aspect of an embodiment of the present invention, a processor is provided, characterized in that the processor is used to run a program, wherein when the program is run, any one of the above-mentioned AC / DC coordinated stability control methods is executed.

[0118] According to another aspect of an embodiment of the present invention, a computer program product is provided, including computer instructions, wherein when the computer instructions are executed by a processor, any one of the above-mentioned AC / DC coordinated stability control methods is executed.

[0119] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided. The computer-readable storage medium includes a stored program, wherein the program executes any one of the above-mentioned AC / DC coordinated stability control methods.

[0120] Optionally, in this embodiment, the computer-readable storage medium may be located in any one of the computer terminals in a computer terminal group in a computer network, or in any one of the communication devices in a communication device group.

[0121] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for executing the following steps: when an AC / DC fault is detected in a target power grid, determining the fault type of the AC / DC fault, wherein the target power grid is a power grid that requires AC / DC fault monitoring; sending the fault type to a target AC / DC control master station so that the target AC / DC control master station can determine an AC / DC control strategy based on the fault type; after receiving the AC / DC control strategy fed back by the target AC / DC control master station, generating an AC / DC control instruction based on the AC / DC control strategy; sending the AC / DC control command to the target control master station, using the target control master station to send the AC / DC control instruction to a target AC / DC execution station, and using the target AC / DC execution station to execute the AC / DC control instruction, wherein the target control master station is a control master station connected to the target AC / DC execution station, and the target AC / DC execution station is an execution station indicated in the AC / DC control strategy.

[0122] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: when the fault type is an AC fault, the target AC / DC control master station is the target AC control master station, and the AC / DC control strategy is determined by the target AC control master station according to the AC fault information corresponding to the AC fault; when the fault type is a DC fault, the target AC / DC control master station is the target DC control master station, and the AC / DC control strategy is determined by the target DC control master station according to the DC fault information corresponding to the DC fault.

[0123] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: obtaining the grid topology of the target grid; determining all possible fault types that may occur in the grid topology; generating a fault control strategy for each of all fault types; generating a fault type / control strategy mapping relationship between all fault types and fault control strategies; and saving the fault type / control strategy mapping relationship.

[0124] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for executing the following steps: when a new AC / DC fault is detected in the target power grid within a predetermined time period, obtaining a new AC / DC control strategy sent by a new target AC / DC control master station; and generating a new AC / DC control instruction according to the AC / DC control strategy and the new AC / DC control strategy.

[0125] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for executing the following steps: when the execution station one indicated in the AC / DC control strategy and the execution station two indicated in the new AC / DC control strategy are different execution stations, generating a new AC / DC control instruction with the execution station two as the target execution station; when the AC / DC control strategy and the new AC / DC control strategy are the same control strategy sent by the same control master station, generating a new AC / DC control instruction based on the control strategy with the larger pending capacity carried in the AC / DC control strategy and the new AC / DC control strategy; when the AC / DC control strategy and the new AC / DC control strategy are the same control strategy sent by different control master stations, generating a new AC / DC control instruction based on the sum of the pending capacities carried in the AC / DC control strategy and the new AC / DC control strategy; when the AC / DC control strategy and the new AC / DC control strategy are different control strategies sent by different control master stations, generating a new AC / DC control instruction based on the new AC / DC control strategy.

[0126] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for executing the following steps: obtaining current information one of the DC control and protection system through the DC control master station, and when the current information one carries fault information, determining that a DC fault has occurred in the target power grid, wherein the current information one at least includes: DC scalable data, retractable control quantity data, and DC fault information; obtaining current information two of the AC execution station through the AC control master station, and when the current information two carries fault information, determining that a DC fault has occurred in the target power grid, wherein the current information two at least includes: AC controllable quantity information.

[0127] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: the DC control master station calculates AC control instructions, DC boost data, and reversible control commands based on DC fault information; the AC control master station calculates AC control commands, DC boost data, and reversible control commands based on AC fault information.

[0128] The serial numbers of the above embodiments of the present invention are for description only and do not represent the advantages or disadvantages of the embodiments.

[0129] In the above embodiments of the present invention, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0130] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only exemplary. For example, the division of the units can be a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0131] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0132] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0133] If the integrated unit 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. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk, etc. Various media that can store program codes.

[0134] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An AC / DC coordinated stability control method, characterized in that: include: When an AC / DC fault is detected in a target power grid, determining a fault type of the AC / DC fault, wherein the target power grid is a power grid requiring AC / DC fault monitoring; Sending the fault type to a target AC / DC control master station, so that the target AC / DC control master station can determine an AC / DC control strategy according to the fault type; After receiving the AC / DC control strategy fed back by the target AC / DC control master station, generating AC / DC control instructions according to the AC / DC control strategy; The AC / DC control command is sent to a target control master station, the target control master station is used to send the AC / DC control instruction to a target AC / DC execution station, and the target AC / DC execution station is used to execute the AC / DC control instruction, wherein the target control master station is a control master station connected to a target AC / DC execution station, and the target AC / DC execution station is an execution station indicated in the AC / DC control strategy. After sending the AC / DC control command to the target control master station, using the target control master station to send the AC / DC control instruction to the target AC / DC execution station, and using the target AC / DC execution station to execute the AC / DC control instruction, the method further includes: when a new AC / DC fault is detected in the target power grid within a predetermined time period, obtaining a new AC / DC control strategy sent by a new target AC / DC control master station; generating a new AC / DC control instruction based on the AC / DC control strategy and the new AC / DC control strategy; Generating a new AC / DC control instruction according to the AC / DC control strategy and the new AC / DC control strategy includes: when the execution station 1 indicated in the AC / DC control strategy and the execution station 2 indicated in the new AC / DC control strategy are different execution stations, generating the new AC / DC control instruction with the execution station 2 as the target execution station; when the AC / DC control strategy and the new AC / DC control strategy are the same control strategy sent by the same control master station, generating the new AC / DC control instruction according to the control strategy with the larger to-be-processed capacity carried by the AC / DC control strategy and the new AC / DC control strategy; when the AC / DC control strategy and the new AC / DC control strategy are the same control strategy sent by different control masters, generating the new AC / DC control instruction according to the sum of the to-be-processed capacities carried by the AC / DC control strategy and the new AC / DC control strategy; when the AC / DC control strategy and the new AC / DC control strategy are different control strategies sent by different control masters, generating the new AC / DC control instruction according to the new AC / DC control strategy.

2. The AC / DC coordinated stability control method according to claim 1, characterized in that: Sending the fault type to a target AC / DC control master station so that the target AC / DC control master station determines an AC / DC control strategy according to the fault type, including: When the fault type is an AC fault, the target AC / DC control master station is a target AC control master station, and the AC / DC control strategy is determined by the target AC control master station according to the AC fault information corresponding to the AC fault; When the fault type is a DC fault, the target AC / DC control master station is a target DC control master station, and the target DC control master station determines the AC / DC control strategy according to DC fault information corresponding to the DC fault.

3. The AC / DC coordinated stability control method according to claim 1, characterized in that: Before sending the fault type to the target AC / DC control master station so that the target AC / DC control master station determines the AC / DC control strategy according to the fault type, the method further includes: Acquiring a grid topology structure of the target grid; Determine all possible fault types that may occur in the power grid topology; generating a fault control strategy for each of said all fault types; Generate a fault type / control strategy mapping relationship between all the fault types and the fault control strategy; The fault type / control strategy mapping relationship is saved.

4. The AC / DC coordinated stability control method according to any one of claims 1 to 3, characterized in that: AC or DC faults are detected in the target power grid, including: obtaining, through the DC control master station, current information one of the DC control and protection system, and determining that a DC fault has occurred in the target power grid when the current information one carries fault information, wherein the current information one includes at least: DC boostable control amount data, DC dropable control amount data, and DC fault information; The AC control master station obtains current information 2 of the AC execution station, and when the current information 2 carries fault information, it is determined that an AC fault occurs in the target power grid, wherein the current information 2 at least includes: AC controllable quantity information.

5. The AC / DC coordinated stability control method according to claim 4, characterized in that: The DC control master station calculates AC control instructions, DC scalable data and reversible control commands according to the DC fault information; the AC control master station calculates AC control instructions, DC scalable data and reversible control commands according to the AC fault information.

6. An AC / DC coordinated stability control device, characterized in that: include: A first determining module is configured to determine a fault type of an AC / DC fault when an AC / DC fault is detected in a target power grid, wherein the target power grid is a power grid requiring AC / DC fault monitoring; a first sending module, configured to send the fault type to a target AC / DC control master station, so that the target AC / DC control master station can determine an AC / DC control strategy according to the fault type; A third processing module is configured to generate an AC / DC control instruction according to the AC / DC control strategy after receiving the AC / DC control strategy fed back by the target AC / DC control master station; a second sending module, configured to send the AC / DC control command to a target control master station, use the target control master station to send the AC / DC control instruction to a target AC / DC execution station, and use the target AC / DC execution station to execute the AC / DC control instruction, wherein the target control master station is a control master station connected to a target AC / DC execution station, and the target AC / DC execution station is an execution station indicated in the AC / DC control strategy; The AC / DC coordinated stability control device further includes: a second acquisition module, configured to acquire a new AC / DC control strategy sent by a new target AC / DC control master station when a new AC / DC fault is detected in the target power grid within a predetermined time period; and a fourth processing module, configured to generate a new AC / DC control instruction based on the AC / DC control strategy and the new AC / DC control strategy. The fourth processing module includes: a first processing unit, configured to generate the new AC / DC control instruction using the execution station 2 as the target execution station when the execution station 1 indicated in the AC / DC control strategy and the execution station 2 indicated in the new AC / DC control strategy are different execution stations; a second processing unit, configured to generate the new AC / DC control instruction according to the control strategy with a larger to-be-processed capacity carried in the AC / DC control strategy and the new AC / DC control strategy when the AC / DC control strategy and the new AC / DC control strategy are the same control strategy sent by the same control master station; a third processing unit, configured to generate the new AC / DC control instruction according to the sum of the to-be-processed capacities carried in the AC / DC control strategy and the new AC / DC control strategy when the AC / DC control strategy and the new AC / DC control strategy are the same control strategy sent by different control master stations; and a fourth processing unit, configured to generate the new AC / DC control instruction according to the new AC / DC control strategy when the AC / DC control strategy and the new AC / DC control strategy are different control strategies sent by different control master stations.

7. A computer-readable storage medium, characterized in that The computer-readable storage medium includes a stored program, wherein the program executes the AC / DC coordinated stability control method according to any one of claims 1 to 5.

8. A computer program product comprising computer instructions, characterized in that When the computer instructions are executed by the processor, the AC / DC coordinated stability control method according to any one of claims 1 to 5 is executed.

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