A Flexible DC Distribution Network Anti-Misoperation Logic Simulation and Verification System and Method

Abstract

The present application discloses a flexible DC distribution network anti-misoperation logic simulation and verification system and method, including: a simulation host subsystem, which is used to access the to-be-simulated control system to a simulation monitoring SCADA host subsystem according to the protocol and address of the to-be-simulated control system of the on-site operation project, so that the interlocking logic of the simulation verification system is the same as that of the on-site operation project, and calculate the grid electrical quantity information and the non-electrical quantity information of the power equipment; a simulation control host subsystem, which is used to obtain the interlocking strategy of the flexible DC distribution network, perform logical operations on the interlocking according to the interlocking conditions in the interlocking strategy based on the electrical quantity information and the non-electrical quantity information, obtain the interlocking calculation result and send it to the simulation monitoring SCADA host subsystem; a simulation monitoring SCADA host subsystem, which is used to judge the correctness of the interlocking strategy according to the interlocking calculation result. It solves the problem that the prior art cannot accurately simulate the interlocking logic of actual projects.

Description

Technical Field

[0001] This application relates to the field of power technologies, and in particular, to a flexible DC distribution network anti-misoperation logic simulation verification system and method. Background Art

[0002] With the rapid development of power electronics technology, the technical and economic advantages of flexible DC distribution networks are gradually emerging. Flexible DC distribution networks can reduce the intermediate links for distributed generation systems and DC loads to access the grid, thereby reducing the access cost. Currently, flexible DC distribution network projects such as the Zhuhai 'Internet +' Smart Energy Demonstration Project have been completed. Due to the diversity of operating conditions of flexible DC distribution network systems, they cannot form standard five-prevention interlocking technologies such as 'preventing misoperation of circuit breakers', 'preventing closing or opening disconnecting switches with load', 'preventing hanging grounding wires when energized', 'preventing energizing with grounding wires', and 'preventing entering energized compartments' like traditional AC substations. The development time of flexible DC distribution networks is relatively short, and the anti-misoperation logic of flexible DC distribution networks is still in the stage of improvement, discussion, and optimization. At the same time, due to the deviation in the understanding of the operating requirements of flexible DC distribution networks by equipment manufacturers, there is a risk of anti-misoperation logic design errors. Due to the large variety of equipment and complex interlocking in the implementation process of flexible DC distribution networks, there is a risk of undetected interlocking association errors. Due to the limitations of on-site commissioning conditions for flexible DC distribution networks, there is a risk of incomplete verification of the five-preventions of interlocking.

[0003] Due to the large number of primary equipment, signals, and types of control devices in the actual project of flexible DC distribution networks, the sources of interlocking signals for the monitoring of flexible DC distribution networks are extensive. However, in the current simulation systems of flexible DC distribution networks, various devices are concentrated in individual control devices, resulting in inconsistent association between the interlocking of the monitoring of flexible DC distribution networks and the monitoring interlocking of the actual project. The interlocking of the simulation training system does not represent the actual on-site situation. Summary of the Invention

[0004] This application provides a flexible DC distribution network anti-misoperation logic simulation verification system and method, which are used to solve the technical problem in the prior art that due to the inconsistent association between the interlocking of the monitoring of flexible DC distribution networks and the monitoring interlocking of the actual project, the interlocking logic of the actual project cannot be accurately simulated.

[0005] In view of this, in the first aspect of this application, a flexible DC distribution network anti-misoperation logic simulation verification system is provided, and the system includes:

[0006] A simulation monitoring SCADA host subsystem, a simulation control host subsystem, and a simulation simulation host subsystem;

[0007] Among them, the simulation simulation host subsystem supports multiple communication protocol outputs and multiple communication address outputs;

[0008] The simulation host subsystem is used to connect the to-be-simulated control system to the simulation monitoring SCADA host subsystem according to the protocol and address of the to-be-simulated control system of the on-site operation project, so that the interlocking logic of the simulation verification system is the same as that of the on-site operation project, and calculate the electrical quantity information of the power grid and the non-electrical quantity information of the power equipment;

[0009] The simulation control host subsystem is used to obtain the interlocking strategy of the flexible DC distribution network, perform logical operations on the interlocking based on the interlocking conditions in the interlocking strategy according to the electrical quantity information and the non-electrical quantity information, obtain the interlocking calculation result and send it to the simulation monitoring SCADA host subsystem;

[0010] The simulation monitoring SCADA host subsystem is used to judge the correctness of the interlocking strategy according to the interlocking calculation result.

[0011] Optionally, the simulation monitoring SCADA host subsystem is specifically used for:

[0012] Judge whether the interlocking strategy is correct according to the interlocking calculation result. If so, send an action command to the simulation control host subsystem. Otherwise, send a prompt signal indicating that the interlocking strategy is incorrect.

[0013] Optionally, the connecting the to-be-simulated control system to the simulation monitoring SCADA host subsystem according to the protocol and address of the to-be-simulated control system of the on-site operation project specifically includes:

[0014] Connect the to-be-simulated control system to the simulation monitoring SCADA host subsystem through the station control network according to the communication point table, SCD, ICD, communication protocol, and communication address of the to-be-simulated control system of the on-site operation project.

[0015] Optionally, the to-be-simulated control system specifically includes:

[0016] Valve cooling control system, DC converter control system, AC substation control system.

[0017] Optionally, the calculating the electrical quantity information of the power grid and the non-electrical quantity information of the power equipment specifically includes:

[0018] Calculate the electrical quantity information of the voltage and current of the AC power grid and the DC power grid through the Fourier filtering algorithm, and simulate and implement the non-electrical quantity information of the faults, alarms, positions, and protections of DC circuit breakers, AC circuit breakers, disconnectors, earthing switches, and DC converter equipment through simulation algorithms.

[0019] Optionally, the simulation host subsystem supports multiple communication protocol outputs and multiple communication address outputs, specifically including: IEC104, IEC61850-GOOSE, IEC61850-MMS, IEC60044-8, MODBUS TCP.

[0020] Optionally, the interlocking calculation results include:

[0021] Mistakenly opening or closing the circuit breaker, pulling or closing the disconnecting switch with load, hanging the grounding wire with power on, sending power with the grounding wire connected, and entering the live working area by mistake.

[0022] The second aspect of this application provides a method for simulating and verifying the anti-misoperation logic of a flexible DC distribution network. The method is applied to the flexible DC distribution network anti-misoperation logic simulation and verification system described in the first aspect above. The method includes:

[0023] The simulation host subsystem connects the control system to be simulated to the simulation monitoring SCADA host subsystem according to the protocol and address of the control system to be simulated in the on-site operation project, so that the interlocking logic of the simulation verification system is the same as that of the on-site operation project, and calculates the electrical quantity information of the power grid and the non-electrical quantity information of the power equipment;

[0024] The simulation control host subsystem obtains the interlocking strategy of the flexible DC distribution network, and based on the electrical quantity information and the non-electrical quantity information, performs a logical operation on the interlocking according to the interlocking conditions in the interlocking strategy, obtains the interlocking calculation result and sends it to the simulation monitoring SCADA host subsystem;

[0025] The simulation monitoring SCADA host subsystem judges the correctness of the interlocking strategy according to the interlocking calculation result.

[0026] Optionally, the simulation monitoring SCADA host subsystem judges the correctness of the interlocking strategy according to the interlocking calculation result, specifically including:

[0027] Judge whether the interlocking strategy is correct according to the interlocking calculation result. If so, send an action command to the simulation control host subsystem. Otherwise, send a prompt signal indicating that the interlocking strategy is incorrect.

[0028] Optionally, connecting the control system to be simulated to the simulation monitoring SCADA host subsystem according to the protocol and address of the control system to be simulated in the on-site operation project specifically includes:

[0029] Connect the control system to be simulated to the simulation monitoring SCADA host subsystem through the station control network according to the communication point table, SCD, ICD, communication protocol, and communication address of the control system to be simulated in the on-site operation project.

[0030] As can be seen from the above technical solutions, the present application has the following advantages:

[0031] The flexible DC distribution network anti-misoperation logic simulation verification system of the present application calculates the voltage and current electrical quantity information of the AC power grid and the DC power grid through the Fourier filtering algorithm, and simulates and realizes the faults, alarms, positions, protection key non-electrical quantity information of DC circuit breakers, AC circuit breakers, disconnectors, earthing switches, and DC converters, and the functions of outputting multiple protocols and multiple communication addresses. Under the condition of streamlining the simulation equipment, the simulation monitoring system accesses the AC substation control, valve cooling control system, flexible DC valve group control system, DC pole control, DC circuit breaker control system, and DC converter control system with the same SCD, ICD, communication protocol, and address as the field, realizing the transplantation of the monitoring system, AC substation control system, and DC pole control system field projects to the simulation system; thus solving the drawback that the current simulation platform and dynamic simulation experiment platform do not have interlocking verification. Through the five-prevention verification algorithm designed by the simulation host, the programming errors in the designed interlocking logic are discovered as much as possible, solving the problem that it depends on programmers, simulators, and operators to discover the five-prevention design logic errors and avoiding the inability of personnel to discover the five-prevention interlocking errors, providing the safety of equipment operation. Brief Description of the Drawings

[0032] Figure 1 It is a system structure diagram of a flexible DC distribution network anti-misoperation logic simulation verification system provided in an embodiment of the present application;

[0033] Figure 2 It is a schematic flowchart of a flexible DC distribution network anti-misoperation logic simulation verification method provided in an embodiment of the present application. Detailed Embodiments

[0034] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present application.

[0035] Please refer to Figure 1 , a flexible DC distribution network anti-misoperation logic simulation verification system provided in an embodiment of the present application, includes:

[0036] A simulation monitoring SCADA host subsystem, a simulation control host subsystem, and a simulation simulation host subsystem;

[0037] Among them, the simulation simulation host subsystem supports the output of multiple communication protocols and multiple communication addresses;

[0038] It should be noted that the various communication protocol outputs and various communication address outputs supported by the simulation host subsystem in this embodiment specifically include: IEC104, IEC61850 - GOOSE, IEC61850 - MMS, IEC60044 - 8, MODBUSTCP.

[0039] The simulation host subsystem 101 is used to connect the control system to be simulated to the simulation monitoring SCADA host subsystem according to the protocol and address of the control system to be simulated in the on - site operation project, so that the interlocking logic of the simulation verification system is the same as that of the on - site operation project, and calculate the electrical quantity information of the power grid and the non - electrical quantity information of power equipment.

[0040] It should be noted that the simulation host subsystem in this embodiment: According to the communication point table, SCD, ICD, communication protocol, and communication address of the valve cooling control system, DC converter control system, and AC substation control in the actual on - site operation project, it simulates and realizes that the valve cooling control system, DC converter, and AC substation control system are connected to the simulation monitoring SCADA host system through the substation control network, and calculates electrical quantity information such as voltage and current of the AC power grid and DC power grid through the Fourier filtering algorithm, and simulates and realizes key non - electrical quantity information such as faults, alarms, positions, and protections of DC circuit breakers, AC circuit breakers, disconnectors, earthing switches, and DC converter equipment through simulation algorithms.

[0041] The simulation control host subsystem 102 is used to obtain the interlocking strategy of the flexible DC distribution network, perform logical operations on the interlocking based on the interlocking conditions in the interlocking strategy according to the electrical quantity information and non - electrical quantity information, and send the interlocking calculation result to the simulation monitoring SCADA host subsystem.

[0042] It should be noted that the simulation control host subsystem in this embodiment inputs the interlocking conditions of the flexible DC distribution network into the simulation control host subsystem according to the interlocking strategy designed for the flexible DC distribution network. The simulation control host subsystem performs logical operations on the interlocking and outputs the equipment interlocking calculation result. For possible situations such as "wrongly opening or closing the circuit breaker", "pulling or closing the disconnector with load", "hanging the grounding wire live", "sending power with the grounding wire", and "entering the live interval by mistake", they may be sent through the simulation monitoring SCADA host subsystem to judge the correctness of the interlocking strategy designed for the flexible DC distribution network.

[0043] The simulation monitoring SCADA host subsystem 103 is used to judge the correctness of the interlocking strategy according to the interlocking calculation result.

[0044] It can be understood that the simulation monitoring SCADA host subsystem accesses the simulation host subsystem, and the simulation host subsystem accesses various devices and systems in the on-site operating project through communication protocol addresses, etc., so as to make the simulation monitoring SCADA host subsystem consistent with the on-site operating project, and thus realize the possibility of verifying the interlocking logic of the on-site operating project in the simulation system; the consistency between the flexible DC pole control, AC substation control and on-site operation control, protection logic, so as to realize the possibility of verifying the interlocking logic of the on-site operating project in the simulation system.

[0045] It should be noted that when the operation and maintenance personnel operate the DC circuit breaker to perform the anti-misoperation check of the simulation monitoring SCADA host subsystem and the anti-misoperation check of the simulation monitoring SCADA host subsystem fails (that is, the interlocking strategy is incorrect), the reason for the failure of the check is prompted through the screen of the simulation monitoring SCADA host subsystem, so that the operation and maintenance personnel can improve the anti-misoperation interlocking logic of the simulation monitoring SCADA host subsystem and the simulation control host according to the reason for the failure. When the anti-misoperation check of the simulation monitoring SCADA host subsystem passes (that is, the interlocking strategy is correct), the simulation monitoring SCADA host subsystem sends the action command to the simulation control sub-host subsystem.

[0046] In a specific embodiment, the simulation monitoring SCADA host subsystem is specifically used for:

[0047] Judge whether the interlocking strategy is correct according to the interlocking calculation result. If so, send an action command to the simulation control host subsystem; otherwise, send a prompt signal indicating that the interlocking strategy is incorrect.

[0048] In a specific embodiment, the simulation host subsystem is specifically used for:

[0049] According to the communication point table, SCD, ICD, communication protocol, and communication address of the control system to be simulated in the on-site operating project, access the control system to be simulated to the simulation monitoring SCADA host subsystem through the station control network, so that the interlocking logic of the simulation verification system is the same as that of the on-site operating project;

[0050] Calculate the electrical quantity information of the voltage and current of the AC power grid and DC power grid through the Fourier filtering algorithm, and simulate the non-electrical quantity information of the faults, alarms, positions, and protections of DC circuit breakers, AC circuit breakers, disconnectors, earthing switches, and DC converters through simulation algorithms.

[0051] A flexible DC distribution network anti-misoperation logic simulation verification system provided by an embodiment of the present application: 1. By simulating the output functions of multiple protocols and multiple communication addresses of the host system, and ensuring that the SCD, ICD, communication point table, communication protocol, and address of the simulation host are consistent with the actual project, the simulation monitoring SCADA host of the flexible DC distribution network is made consistent with the field monitoring SCADA host project, enabling the simulation monitoring SCADA host to implement the same interlocking anti-misoperation logic as the field monitoring SCADA host; 2. By simulating the communication point table and communication protocol of the actual field through the simulation host system, the consistency of the interactive data of the valve cooling control system, DC converter control system, AC substation control system, process layer network of the flexible DC valve group control system, and DC pole control host is achieved. Finally, the consistency of the flexible DC valve group control system, flexible DC pole control, AC substation control, and field control and protection logic is realized, enabling the AC substation control and DC pole control to implement the same interlocking anti-misoperation logic as the field control host; 3. The consistency between the monitoring system, AC substation control system, DC pole control system and the field realizes the feasibility of verifying the on-site interlocking logic and the interlocking logic of the five-prevention host on the simulation platform.

[0052] The above is an embodiment of a flexible DC distribution network anti-misoperation logic simulation verification system provided in an embodiment of the present application. The following is an embodiment of a flexible DC distribution network anti-misoperation logic simulation verification method provided in an embodiment of the present application.

[0053] Step 201: The simulation host subsystem connects the control system to be simulated to the simulation monitoring SCADA host subsystem according to the protocol and address of the control system to be simulated in the on-site operation project, so that the interlocking logic of the simulation verification system is the same as that of the on-site operation project, and calculates the electrical quantity information of the power grid and the non-electrical quantity information of the power equipment.

[0054] Step 202: The simulation control host subsystem obtains the interlocking strategy of the flexible DC distribution network, performs logical operations on the interlocking according to the interlocking conditions in the interlocking strategy based on the electrical quantity information and non-electrical quantity information, obtains the interlocking calculation result, and sends it to the simulation monitoring SCADA host subsystem.

[0055] Step 203: The simulation monitoring SCADA host subsystem judges the correctness of the interlocking strategy according to the interlocking calculation result.

[0056] Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working process of the method described above can refer to the corresponding process in the foregoing system embodiment, and will not be repeated here.

[0057] In the description of the present application and the above-mentioned accompanying drawings, terms such as "first", "second", "third", "fourth", etc. (if any) are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0058] It should be understood that in the present application, "at least one (item)" means one or more, and "a plurality" means two or more. "And / or" is used to describe the association relationship of associated objects and indicates that there can be three relationships. For example, "A and / or B" can mean: only A exists, only B exists, and both A and B exist at the same time. Among them, A and B can be singular or plural. The character " / " generally means that the associated objects before and after are in an "or" relationship. "At least one (one) of the following" or its similar expression refers to any combination of these items, including any combination of single item (one) or plural items (ones). For example, at least one (one) of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0059] In several embodiments provided by the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there can be other division methods in actual implementation. For example, 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 displayed or discussed coupling or direct coupling or communication connection to each other can be through some interfaces, and the indirect coupling or communication connection of the device or unit can be in an electrical, mechanical or other form.

[0060] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0061] In addition, in each embodiment of the present application, each functional unit can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0062] If the above-mentioned 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 such an understanding, the technical solution of the present application, in essence, 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. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (English full name: Read-Only Memory, English abbreviation: ROM), random access memories (English full name: Random Access Memory, English abbreviation: RAM), magnetic disks, or optical discs that can store program codes.

[0063] As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of each embodiment of the present application.

Claims

1. A flexible DC distribution network anti-error logic simulation and verification system, characterized in that, it includes: a simulation monitoring SCADA host subsystem, a simulation control host subsystem, and a simulation simulation host subsystem; wherein, the simulation simulation host subsystem supports multiple communication protocol outputs and multiple communication address outputs; the simulation simulation host subsystem is used to connect the to-be-simulated control system to the simulation monitoring SCADA host subsystem according to the protocol and address of the to-be-simulated control system of the on-site operation project, so that the interlocking logic of the simulation verification system is the same as that of the on-site operation project, and calculate the electrical quantity information of the power grid and the non-electrical quantity information of the power equipment; the simulation control host subsystem is used to obtain the interlocking strategy of the flexible DC distribution network, perform logical operations on the interlocking based on the interlocking conditions in the interlocking strategy according to the electrical quantity information and the non-electrical quantity information, obtain the interlocking calculation result and send it to the simulation monitoring SCADA host subsystem; the simulation monitoring SCADA host subsystem is used to judge the correctness of the interlocking strategy according to the interlocking calculation result; wherein, connecting the to-be-simulated control system to the simulation monitoring SCADA host subsystem according to the protocol and address of the to-be-simulated control system of the on-site operation project specifically includes: connecting the to-be-simulated control system to the simulation monitoring SCADA host subsystem through the station control network according to the communication point table, SCD, ICD, communication protocol, and communication address of the to-be-simulated control system of the on-site operation project; the calculation of the electrical quantity information of the power grid and the non-electrical quantity information of the power equipment specifically includes: calculating the electrical quantity information of the voltage and current of the AC power grid and the DC power grid through the Fourier filtering algorithm, and simulating and realizing the non-electrical quantity information of the faults, alarms, positions, and protections of DC circuit breakers, AC circuit breakers, disconnectors, earthing switches, and DC converters through simulation algorithms.

2. The flexible DC distribution network anti-error logic simulation and verification system according to claim 1, characterized in that, the simulation monitoring SCADA host subsystem is specifically used for: judging whether the interlocking strategy is correct according to the interlocking calculation result. If so, sending an action command to the simulation control host subsystem; otherwise, sending a prompt signal indicating that the interlocking strategy is incorrect.

3. The flexible DC distribution network anti-error logic simulation and verification system according to claim 1, characterized in that, the to-be-simulated control system specifically includes: a valve cooling control system, a DC converter control system, and an AC substation control system.

4. The flexible DC distribution network anti-error logic simulation and verification system according to claim 1, characterized in that, the simulation simulation host subsystem supports multiple communication protocol outputs and multiple communication address outputs, specifically including: IEC104, IEC61850-GOOSE, IEC61850-MMS, IEC60044-8, MODBUS TCP.

5. The flexible DC distribution network anti-error logic simulation and verification system according to claim 1, characterized in that, the interlocking calculation result includes: Accidentally closing or opening a circuit breaker, pulling or closing a disconnecting switch under load, hanging a grounding wire while energized, energizing with a grounding wire connected, or entering a live working space by mistake.

6. A method for simulating and verifying the anti-maloperation logic of a flexible DC distribution network, characterized in that, applied to the flexible DC distribution network anti-maloperation logic simulation verification system of any one of claims 1-5, the method includes: The simulation host subsystem connects the control system to be simulated to the simulation monitoring SCADA host subsystem according to the protocol and address of the control system to be simulated in the on-site operation project, so that the interlocking logic of the simulation verification system is the same as that of the on-site operation project, and calculates the electrical quantity information of the power grid and the non-electrical quantity information of the power equipment; The simulation control host subsystem obtains the interlocking strategy of the flexible DC distribution network, and performs logical operations on the interlocking based on the interlocking conditions in the interlocking strategy according to the electrical quantity information and the non-electrical quantity information, obtains the interlocking calculation result and sends it to the simulation monitoring SCADA host subsystem; The simulation monitoring SCADA host subsystem judges the correctness of the interlocking strategy according to the interlocking calculation result; wherein, the simulation host subsystem connects the control system to be simulated to the simulation monitoring SCADA host subsystem according to the protocol and address of the control system to be simulated in the on-site operation project, specifically including: The simulation host subsystem connects the control system to be simulated to the simulation monitoring SCADA host subsystem through the station control network according to the communication point table, SCD, ICD, communication protocol, and communication address of the control system to be simulated in the on-site operation project; The calculation of the electrical quantity information of the power grid and the non-electrical quantity information of the power equipment, specifically including: Calculating the electrical quantity information of voltage and current of AC and DC power grids through the Fourier filtering algorithm, and simulating the non-electrical quantity information of faults, alarms, positions, and protections of DC circuit breakers, AC circuit breakers, disconnectors, earthing switches, and DC converters through simulation algorithms.

7. The method for simulating and verifying the anti-maloperation logic of a flexible DC distribution network according to claim 6, characterized in that, The simulation monitoring SCADA host subsystem judges the correctness of the interlocking strategy according to the interlocking calculation result, specifically including: Judging whether the interlocking strategy is correct according to the interlocking calculation result. If so, sending an action command to the simulation control host subsystem; otherwise, sending a prompt signal indicating that the interlocking strategy is incorrect.

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