Online inspection method and system for power grid stability control system based on virtual device

Abstract

The invention discloses a power grid stability control system online inspection method and system based on a virtual device, and the method comprises the steps: constructing a virtual stability control system mirrored with an actual stability control system, and carrying out the operation according to the real-time operation state of the actual stability control system; the virtual stability control system executes a preset fault simulation instruction and feeds back a fault simulation result; and combining the real-time running state of the power grid, the preset fault and the fault simulation result to check the effectiveness of the actual stability control system. According to the invention, control strategy logic online inspection can be carried out by combining the real-time information of the power grid and the preset fault, and the effectiveness of the stable control system under the actual fault condition of the power grid is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of power grids, and in particular relates to an online inspection method and system for a power grid stability control system based on a virtual device. Background Art

[0002] The operation mode of the new power system is complex and changeable, and the system instability characteristics are coupled, which brings great challenges to the effectiveness of the safe and stable operation of the power grid. As the core of the stability control system, the rationality and correctness of the stability control strategy are prerequisites for ensuring the normal operation of the stability control system. The existing stability control system adopts the "offline decision-making, online matching" control mode. When a power grid fails, the stability control system quickly matches the control measures according to the current operation mode of the power grid and the pre-compiled strategy. Since the operation mode and expected faults considered in the calculation cannot be exhaustive, there is a risk that the fault control strategy does not match the real-time operation mode.

[0003] The current verification of stability control devices and systems mainly includes static testing, RTDS testing, and management master station strategy modeling rehearsal, but none of the above methods can achieve online verification using the device's own functional logic and the actual operation status of the power grid. In addition, in order to ensure the rapidity and effectiveness of the stability control device's response to power grid accidents, the software logic strictly distinguishes between normal and fault states. When the control system is operating in a normal state, it is difficult to monitor and evaluate the effectiveness of the corresponding control measures after a power grid accident in real time. Therefore, it is urgent to explore new online verification methods for stability control systems to ensure the effectiveness of stability control systems in the event of actual power grid failures. Summary of the invention

[0004] The purpose of the present invention is to provide an online inspection method and system for a power grid stability control system based on a virtual device, which can ensure the effectiveness of the stability control system in the event of an actual power grid fault.

[0005] In order to achieve the above object, the solution of the present invention is:

[0006] An online inspection method for a power grid stability control system based on a virtual device comprises the following steps:

[0007] Step 1, constructing a virtual stability control system that is a mirror image of an actual stability control system, and operating it in the real-time operating state of the actual stability control system;

[0008] Step 2, the virtual stability control system executes the preset fault simulation instruction and feeds back the fault simulation result;

[0009] Step 3: Verify the effectiveness of the actual stability control system by combining the real-time operation status of the power grid, preset faults and fault simulation results.

[0010] Wherein, the stability control system includes several actual stability control devices; in the step 1, the virtual stability control system includes several virtual stability control devices mirrored with the several actual stability control devices, and each virtual stability control device operates in the real-time operating state of the actual stability control device it mirrors.

[0011] Among them, each virtual stability control device operates according to the real-time operating status of the actual stability control device it mirrors, including that the stability control information management main station communicates with each actual stability control device to obtain its real-time operating data; each virtual stability control device communicates with the stability control information management main station to obtain the real-time operating data of the actual stability control device it mirrors.

[0012] The specific content of step 2 is:

[0013] Step 21, the stability control information management master station sends a fault simulation instruction to one or more virtual stability control devices;

[0014] Step 22, the virtual stability control device(s) executes a fault simulation instruction based on the real-time operating status of the actual stability control device mirrored thereto to obtain a fault simulation result;

[0015] Step 23, the fault simulation result is fed back to the main station for stabilization and control information management.

[0016] Among them, in the step 2, the fault simulation instruction is arranged in the main station of the stability control information management to be manually triggered or automatically triggered.

[0017] Among them, in the step 3, the stability control information management main station receives the fault simulation results, comprehensively considers the preset fault type and the real-time operation status of the power grid, verifies the correctness of the fault simulation results of the virtual stability control system, and thus indirectly verifies the effectiveness of the actual stability control system.

[0018] An online inspection system for a power grid stability control system based on a virtual device, comprising:

[0019] a virtual stability control system configured to mirror an actual stability control system and to operate in a real-time operating state of the actual stability control system;

[0020] a preset fault module, configured to control the virtual stability control system to execute a preset fault simulation instruction; and

[0021] The strategy verification module is configured to verify the effectiveness of the actual stability control system by combining the real-time operation status of the power grid, the preset faults and the fault simulation results of the virtual stability control system executing the preset fault simulation instructions.

[0022] Wherein, the stability control system includes a number of actual stability control devices;

[0023] The virtual stability control system includes a plurality of virtual stability control devices mirrored with the plurality of actual stability control devices, and each virtual stability control device operates according to the real-time operation state of the actual stability control device mirrored by it.

[0024] Among them, each virtual stability control device operates according to the real-time operating status of the actual stability control device it mirrors, including that the stability control information management main station communicates with each actual stability control device to obtain its real-time operating data; each virtual stability control device communicates with the stability control information management main station to obtain the real-time operating data of the actual stability control device it mirrors.

[0025] Wherein, the preset fault module is configured to control the virtual stability control system to execute a preset fault simulation instruction, including:

[0026] The preset fault module sends a fault simulation instruction to one or more virtual stability control devices;

[0027] The virtual stability control device(s) executes a fault simulation instruction based on the real-time operating state of the actual stability control device mirrored by the virtual stability control device(s) to obtain a fault simulation result;

[0028] The fault simulation result is fed back to the strategy verification module.

[0029] The preset fault module stores a preset fault simulation instruction, which is triggered manually or automatically.

[0030] The strategy verification module receives the fault simulation results, comprehensively considers the preset fault type and the real-time operation status of the power grid, verifies the correctness of the fault simulation results of the virtual stability control system, and thus indirectly verifies the effectiveness of the actual stability control system.

[0031] A computer device comprises a memory, a processor, and a computer program stored in the memory and executable on the processor; when the processor executes the computer program, the steps of the online inspection method of a power grid stability control system based on a virtual device as described above are implemented.

[0032] A computer-readable storage medium stores a computer program; when the computer program is executed by a processor, the steps of the online inspection method of a power grid stability control system based on a virtual device as described above are implemented.

[0033] After adopting the above scheme, the present invention can combine the real-time information of the power grid and the preset faults to perform online verification of the control strategy logic, thereby ensuring the effectiveness of the stable control system in the event of an actual power grid fault. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural diagram of the online inspection system of the present invention;

[0035] Figure 2 It is a flow chart of the online inspection method of the present invention. DETAILED DESCRIPTION

[0036] The present invention provides an online inspection method for a power grid stability control system based on a virtual device, comprising the following steps:

[0037] Step 1, constructing a virtual stability control system that is a mirror image of an actual stability control system, and operating it in the real-time operating state of the actual stability control system;

[0038] Step 2, the virtual stability control system executes the preset fault simulation instruction and feeds back the fault simulation result;

[0039] Step 3: Verify the effectiveness of the actual stability control system by combining the real-time operation status of the power grid, preset faults and fault simulation results.

[0040] Wherein, the stability control system includes a number of actual stability control devices;

[0041] In the step 1, the virtual stability control system includes a plurality of virtual stability control devices mirrored with the plurality of actual stability control devices, and each virtual stability control device operates in the real-time operating state of the actual stability control device it mirrors.

[0042] Among them, each virtual stability control device operates according to the real-time operating status of the actual stability control device it mirrors, including that the stability control information management main station communicates with each actual stability control device to obtain its real-time operating data; each virtual stability control device communicates with the stability control information management main station to obtain the real-time operating data of the actual stability control device it mirrors.

[0043] The specific content of step 2 is as follows:

[0044] Step 21, the stability control information management master station sends a fault simulation instruction to one or more virtual stability control devices;

[0045] Step 22, the virtual stability control device(s) executes a fault simulation instruction based on the real-time operating status of the actual stability control device mirrored thereto to obtain a fault simulation result;

[0046] Step 23, the fault simulation result is fed back to the main station for stabilization and control information management.

[0047] It should be noted that, in the stability control system, one actual stability control device serves as the master station for executing the fault type control strategy, and all other actual stability control devices serve as substations or execution stations for executing remote station commands; in step 22, when the virtual stability control device receiving the fault simulation instruction is the master station, step 221 is executed; when the virtual stability control device receiving the fault simulation instruction is the substation / execution station, step 222 is executed;

[0048] Step 221, the virtual stability control device(s) executes a fault simulation instruction based on the real-time operating status of the actual stability control device mirrored thereto to obtain a first fault simulation result, wherein the first fault simulation result includes a local action and a remote station command; the first fault simulation result is fed back to the stability control information management master station;

[0049] The one or more virtual stability control devices send the remote station command to the remaining virtual stability control devices, and the remaining virtual stability control devices execute the remote station command based on the real-time operating status of the actual stability control device mirrored thereto, and obtain a plurality of second fault simulation results; all the second fault simulation results are fed back to the stability control information management master station;

[0050] Step 222, the one / some virtual stability control device executes a fault simulation instruction based on the real-time operating status of the actual stability control device mirrored therewith, and obtains a third fault simulation result; the third fault simulation result is fed back to the stability control information management main station; wherein, the third fault simulation result may only include local actions, or may also include remote station commands; when the third fault simulation result also includes remote station commands, the one / some virtual stability control device also sends the remote station commands to the corresponding virtual stability control device, and the corresponding virtual stability control device executes the command and generates a fourth fault simulation result, which is fed back to the stability control information management main station.

[0051] In the step 2, the fault simulation instruction is arranged in the main station of the stability control information management to be manually triggered or automatically triggered.

[0052] In step 3, the main station for managing stability control information receives the fault simulation result, comprehensively considers the preset fault type and the real-time operation status of the power grid, verifies the correctness of the fault simulation result of the virtual stability control system, and thus indirectly verifies the effectiveness of the actual stability control system.

[0053] like Figure 2As shown, it is a preferred embodiment of an online verification method of a power grid stability control system based on a virtual device of the present invention, which is used to verify an actual stability control system, wherein the stability control system includes a first actual stability control device and a second actual stability control device, wherein the first actual stability control device is set as a master station for executing a stability control strategy; the second actual stability control device is set as a substation or an execution station for executing a remote station command of the first actual stability control device; the online verification method includes the following steps:

[0054] Step S1: Based on the actual operation of the power grid, a virtual stable control system is constructed with input and output interfaces, functional logic, and set values ​​that are completely consistent;

[0055] In step S1, the stability control system refers to a system composed of stability control devices of multiple plants and stations communicating and cooperating with each other. The virtual stability control device has no actual physical form and relies on digital twin technology to completely mirror the physical stability control device. The input and output interfaces, functional logic, and constants of the two are completely consistent.

[0056] Step S2, the virtual stability control device communicates with the stability control information management master station to obtain real-time information perceived by the actual running stability control device;

[0057] In step S2, the stability control information management main station communicates with the actual operating stability control device to obtain the voltage and current analog information of each component such as the transmission line, transformer, generator, etc. collected by the device, the circuit breaker position and the switch quantity information such as the function pressure plate, as well as the device's own operating status and constant value information; the virtual stability control device communicates with the stability control information management main station to obtain the analog quantity and switch quantity operating information of the actual operating stability control device corresponding to the mirror source, that is, the virtual stability control device can fully and truly reflect the real-time status of the actual operating stability control device.

[0058] Step S3: The main station for managing stability control information presets a fault simulation instruction and sends it to the virtual stability control device;

[0059] In the step S3, the power grid related fault simulation function is arranged in the stability control information management master station, which can be triggered manually or automatically; the virtual stability control device receives the fault simulation instruction of the stability control information management master station, and the actual stability control device does not receive the fault simulation instruction of the stability control information management master station and is not affected by any online inspection process of the virtual stability control device.

[0060] Step S4, the virtual stability control device calculates the stability control strategy based on the current real-time information of the power grid and the preset fault, and returns the result to the stability control information management master station;

[0061] The step S4 comprises:

[0062] S41: After receiving the fault simulation command sent by the stability control information management master station, the virtual stability control device performs control strategy logic calculation based on the real-time information of the corresponding actual operation stability control device sensed, and its action result includes local action and remote station command;

[0063] S42: The virtual stability control device of the adjacent plant station acts according to the preset control logic after receiving the remote station command;

[0064] S43: The virtual stability control device of each plant station in the virtual stability control system returns all the action results of this fault simulation to the stability control information management master station.

[0065] Step S5, the stability control information management master station checks the effectiveness of the stability control system by combining the real-time information of the power grid, the preset faults and the action results of the virtual stability control device;

[0066] In step S5, the main station for managing stability control information receives the action results of the virtual stability control devices of each plant and station, and verifies the correctness of the action results of the virtual stability control system based on the fault type recorded by itself and the current operating status of the power grid. The virtual stability control system and the actual stability control system are completely equivalent, thereby indirectly verifying the effectiveness of the actual stability control system.

[0067] The present invention also provides an online inspection system for a power grid stability control system based on a virtual device, comprising:

[0068] a virtual stability control system configured to mirror an actual stability control system and to operate in a real-time operating state of the actual stability control system;

[0069] a preset fault module, configured to control the virtual stability control system to execute a preset fault simulation instruction; and

[0070] The strategy verification module is configured to verify the effectiveness of the actual stability control system by combining the real-time operation status of the power grid, the preset faults and the fault simulation results of the virtual stability control system executing the preset fault simulation instructions.

[0071] The technical solutions and beneficial effects of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0072] like Figure 1 As shown, taking the stability control device of station A and the stability control device of station B forming a small stability control system as an example, station A is the stability control master station device, which is configured with the stability control strategy, and station B is the stability control execution station device, which cooperates with the remote command execution of station A. The two cooperate to complete the complete stability control system function.

[0073] First, based on the actual running stability control device of station A and station B, the digital twin technology is used to completely mirror the actual running stability control device of station A and station B respectively, and construct the virtual stability control device of station A and station B with completely consistent input and output interfaces, functional logic, and set values. The virtual stability control device of station A and the virtual stability control device of station B constitute the corresponding complete virtual stability control system.

[0074] Secondly, the main station for stability control information management communicates with the actually operating stability control device and the virtual stability control device at the same time, and obtains the voltage and current analog information of each component such as the transmission line, transformer, generator, etc., the switch quantity information such as the position of the circuit breaker and the function pressure plate, the device's own operating status and constant value information collected by the actually operating stability control devices of station A and station B, and transmits all the information completely to the corresponding virtual stability control devices of station A and station B, that is, the virtual stability control devices of station A and station B can fully and truly reflect the real-time status of the actually operating stability control devices of station A and station B.

[0075] The complete process of online inspection of the stability control system is described as follows:

[0076] 1) The power grid preset fault simulation instruction is triggered by the stability control information management master station and sent to the virtual stability control device of station A;

[0077] 2) After the virtual stability control device of station A receives the preset fault simulation instruction sent by the stability control information management main station, it collects the analog quantity, switch information, and operating status in real time in combination with the corresponding actual operation perceived by the stability control device A. If the relevant state judgment and control strategy logic conditions are met, the corresponding control strategy action is triggered and the action result is returned to the stability control information management main station, where the action result includes the local action and the inter-station command sent to the virtual stability control device of station B.

[0078] 3) After receiving the inter-station command from the virtual stability control device of station A, the virtual stability control device of station B combines the real-time status of the corresponding actual operation of the stability control device B, acts according to the preset control logic, and returns the action result to the stability control information management master station.

[0079] 4) The main station for stability control information management receives the action results of the virtual stability control devices at stations A and B, and verifies whether the action results of the virtual stability control system meet the expected goals based on the fault type recorded by itself and the current operation status of the power grid. Based on the complete equivalence between the constructed virtual stability control system and the actual stability control system, the effectiveness of the actual operation stability control system in the event of a fault is verified.

[0080] An embodiment of the present invention further provides another computer device, including a processor and a memory configured to store a computer program that can be run on the processor; wherein, when the processor is configured to run the computer program, the method steps in the aforementioned embodiment are executed.

[0081] In practical applications, the processor includes a field programmable gate array (FPGA), and the processor may be a central processing unit (CPU) or a digital signal processor (DSP). It is understandable that for different devices, the electronic device used to implement the function of the processor may be other, and the embodiment of the present invention does not specifically limit it.

[0082] The above-mentioned memory can be a volatile memory (volatile memory), such as a random access memory (RAM); or a non-volatile memory (non-volatile memory), such as a read-only memory (ROM), a flash memory, a hard disk (HDD) or a solid-state drive (SSD); or a combination of the above-mentioned types of memory, and provide instructions and data to the processor.

[0083] In an exemplary embodiment, an embodiment of the present invention further provides a computer-readable storage medium for storing a computer program.

[0084] Optionally, the computer-readable storage medium can be applied to any one of the methods in the embodiments of the present invention, and the computer program enables the computer to execute the corresponding processes implemented by the processor in each method in the embodiments of the present invention. For the sake of brevity, they are not described here.

[0085] In the several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0086] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes. The schemes in the embodiments of the present invention may be implemented in various computer languages, for example, object-oriented programming language Java and literal scripting language JavaScript, etc.

[0087] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0088] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0089] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0090] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0091] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A virtual device-based online inspection method for a power grid stability control system, characterized in that The steps include: Step 1, constructing a virtual stability control system that is a mirror image of an actual stability control system, and operating it in the real-time operating state of the actual stability control system; Step 2, the virtual stability control system executes the preset fault simulation instruction and feeds back the fault simulation result; Step 3: Verify the effectiveness of the actual stability control system by combining the real-time operation status of the power grid, preset faults and fault simulation results.

2. The method according to claim 1, characterized in that: The stability control system includes a number of actual stability control devices; In the step 1, the virtual stability control system includes a plurality of virtual stability control devices mirrored with the plurality of actual stability control devices, and each virtual stability control device operates in the real-time operating state of the actual stability control device it mirrors.

3. The method according to claim 2, characterized in that: Each virtual stability control device operates according to the real-time operating status of the actual stability control device it mirrors, including: the stability control information management master station communicates with each actual stability control device to obtain its real-time operating data; each virtual stability control device communicates with the stability control information management master station to obtain the real-time operating data of the actual stability control device it mirrors.

4. The method according to claim 2, characterized in that: The specific content of step 2 is: Step 21, the stability control information management master station sends a fault simulation instruction to one or more virtual stability control devices; Step 22, the virtual stability control device(s) executes a fault simulation instruction based on the real-time operating status of the actual stability control device mirrored thereto to obtain a fault simulation result; Step 23, the fault simulation result is fed back to the main station for stabilization and control information management.

5. The method according to claim 1, characterized in that: In the step 2, the fault simulation instruction is arranged in the main station of the stability control information management to be manually triggered or automatically triggered.

6. The method according to claim 1, characterized in that: In step 3, the main station for managing stability control information receives the fault simulation result, comprehensively considers the preset fault type and the real-time operation status of the power grid, verifies the correctness of the fault simulation result of the virtual stability control system, and thus indirectly verifies the effectiveness of the actual stability control system.

7. An online inspection system for a power grid stability control system based on a virtual device, characterized in that: include, a virtual stability control system configured to mirror an actual stability control system and to operate in a real-time operating state of the actual stability control system; A preset fault module is configured to control the virtual stability control system to execute a preset fault simulation instruction; as well as, The strategy verification module is configured to verify the effectiveness of the actual stability control system by combining the real-time operation status of the power grid, the preset faults and the fault simulation results of the virtual stability control system executing the preset fault simulation instructions.

8. The system according to claim 7, characterized in that: The stability control system includes a number of actual stability control devices; The virtual stability control system includes a plurality of virtual stability control devices mirrored with the plurality of actual stability control devices, and each virtual stability control device operates according to the real-time operation state of the actual stability control device mirrored by it.

9. The system according to claim 8, characterized in that: Each virtual stability control device operates according to the real-time operating status of the actual stability control device it mirrors, including: the stability control information management master station communicates with each actual stability control device to obtain its real-time operating data; each virtual stability control device communicates with the stability control information management master station to obtain the real-time operating data of the actual stability control device it mirrors.

10. The system according to claim 8, characterized in that: The preset fault module is configured to control the virtual stability control system to execute preset fault simulation instructions, including: The preset fault module sends a fault simulation instruction to one or more virtual stability control devices; The virtual stability control device(s) executes a fault simulation instruction based on the real-time operating state of the actual stability control device mirrored by the virtual stability control device(s) to obtain a fault simulation result; The fault simulation result is fed back to the strategy verification module.

11. The system according to claim 7, characterized in that: The preset fault module stores a preset fault simulation instruction, which is triggered manually or automatically.

12. The system of claim 7, wherein: The strategy verification module receives the fault simulation result, comprehensively considers the preset fault type and the real-time operation status of the power grid, verifies the correctness of the fault simulation result of the virtual stability control system, and thus indirectly verifies the effectiveness of the actual stability control system.

13. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor; characterized in that: When the processor executes the computer program, the steps of the online inspection method of the power grid stability control system based on a virtual device as described in any one of claims 1 to 6 are implemented.

14. A computer-readable storage medium storing a computer program; characterized in that: When the computer program is executed by a processor, the steps of the online inspection method of a power grid stability control system based on a virtual device as claimed in any one of claims 1 to 6 are implemented.

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