A test system and method suitable for DC operation control and protection system connection

Abstract

The present invention discloses a test system and method suitable for the DC operation control and protection system to be connected to the grid. The system includes a connection control device and a connection protection device. The connection control device is connected to the DC operation control and protection system and the connection protection device to collect relevant signal data and implement control actions, and collect relevant events and waveforms at the same time to test the control device in the DC operation control and protection system. The connection protection device is connected to the connection control device and the DC operation control and protection system to collect relevant signal data and implement protection actions, and collect relevant events and waveforms at the same time to test the operating status of the protection device and the power grid in the DC operation control and protection system. The present invention can be used for long-term connection testing of DC transmission control and protection equipment to ensure that the operation program of the connected DC operation control and protection system is complete, and the function and performance of the device are verified by comparing with the events and waveforms of the operating system, without affecting the safe and stable operation of the operating system.

Description

Technical Field

[0001] The present invention relates to the technical field of direct current power transmission and distribution, and in particular to a testing system and method suitable for connecting a direct current operation control and protection system to a network. Background Art

[0002] DC transmission has been widely used in the fields of west-to-east power transmission, large-scale new energy access, AC system zone interconnection, island power supply and urban distribution networks. As the proportion of DC transmission capacity in the power grid increases, the reliability requirements for DC equipment are also getting higher and higher.

[0003] As the brain of DC power transmission, the DC operation control and protection system is currently subject to network access standards mainly through type test inspection. The device hardware is tested through type test items, and the device software is verified through static and dynamic model test items. The above test environments are all laboratory simulations. The number of external interfaces connected to the control and protection equipment is limited, and the long-term operation reliability cannot be fully tested. When the DC operation control and protection system has a major architecture upgrade or a large-scale replacement of core chips, there is a great risk in directly carrying out engineering applications. Network-connected trial operation is an effective means to test new equipment and has been widely used in AC stations. Unlike AC measurement and control and AC protection devices that can operate independently, the DC operation control and protection system operates as a whole system and most of the devices are redundantly configured, and each device needs to work together in real time. At present, the network-connected trial operation of the existing DC operation control and protection system still refers to the AC control and protection equipment, and the external interfaces are simplified, which is quite different from the actual operating conditions. Network connection is mainly to test the reliability of the device hardware. Therefore, it is necessary to design a grid-connected test system based on the characteristics of the DC operation control and protection system. Under the premise of not affecting the operation of the DC system, as many external interfaces of the grid-connected equipment as possible should be connected to accurately simulate the actual operating conditions.

[0004] The grid-connected test system can be used to conduct long-term grid-connected tests on the software and hardware of new equipment, and comprehensively test the functions, performance and reliability of new equipment, thereby providing an effective testing method for the upgrading of DC operation control and protection systems and continuously improving the technical level of DC transmission control and protection equipment. Summary of the invention

[0005] In order to solve the above-mentioned technical problems, the present invention provides a test system and method suitable for a DC operation control and protection system to solve the current technical problem of unreliable test of the DC operation control and protection system to be tested.

[0006] A test system suitable for the grid connection of a DC operation control and protection system, comprising: a grid connection control device and a grid connection protection device;

[0007] The grid-connected control device is connected to the DC operation control and protection system and the grid-connected protection device, and is used for the DC operation control and protection system to collect the first interface data, communication data, forwarding data and the protection action signal of the grid-connected protection device in the grid-connected state and perform control actions, and at the same time collect relevant events and waveforms to test the control device in the DC operation control and protection system;

[0008] The grid-connected protection device is connected to the grid-connected control device and the DC operation control and protection system, and is used for the DC operation control and protection system to collect the second interface data of the DC operation control and protection system and the data received by the grid-connected control system in the grid-connected state and to perform protection actions, while collecting related events and waveforms to test the operating status of the protection device and the power grid in the DC operation control and protection system.

[0009] Preferably, the DC operation control and protection system comprises:

[0010] Protection devices, used to trip or send special signals to protect the grid according to the grid operation status;

[0011] Control device, used to obtain and control the operation status of the power grid and collect relevant data;

[0012] Measurement interfaces and other interfaces are used to connect with other equipment.

[0013] Preferably, the grid-connected control device is connected to a DC operation control and protection system, and includes:

[0014] The grid-connected control device is directly connected and communicates with each control device in the DC operation control and protection system respectively;

[0015] The grid-connected control device is directly connected and communicates with the measurement interface in the DC operation control and protection system;

[0016] The grid-connection control device is directly connected and communicates with other interfaces in the DC operation control and protection system;

[0017] The direct communication is one-way communication, and data can only be sent from the DC operation control and protection system to the grid-connected control device;

[0018] The network control device receives the communication data and forwarding data of the control device;

[0019] The grid-connected control device receives first interface data collected by the measurement interface and other interfaces in the DC operation control and protection system.

[0020] Preferably, the net hanging control device is connected to the net hanging protection device, including:

[0021] The net hanging control device is bidirectionally connected to the net hanging protection device;

[0022] The net hanging control device receives the protection action signal of the net hanging protection device;

[0023] The net hanging protection device receives the data received by the net hanging control device.

[0024] Preferably, the grid-connected protection device is connected to a DC operation control and protection system, and includes:

[0025] The grid-connected protection device is connected to the measurement interface in the DC operation control and protection system;

[0026] The grid-connected protection device receives second interface data collected by the measurement interface in the DC operation control and protection system.

[0027] Preferably, the net hanging control device comprises:

[0028] Perform control logic operation according to the communication data, the forwarding data and the first interface data;

[0029] Performing logic processing according to the protection action signal of the hanging net protection device;

[0030] According to the logic control and control logic calculation, the hanging net control parameters are obtained;

[0031] Carry out control actions according to the screen hanging control parameters;

[0032] Obtaining a first event and a first waveform during the operation of the screen hanging control device according to the control action;

[0033] The first event and the first waveform are compared with the third event and the third waveform of the control device in the DC operation control and protection system to test the function and performance of the grid-connected control device.

[0034] Preferably, the hanging net protection device comprises:

[0035] Perform protection logic operation according to the second interface data and the data received by the network control device to obtain network protection parameters;

[0036] Implement protection actions according to the protection parameters of the hanging net;

[0037] According to the protection action, a second event and a second waveform are obtained during the operation of the hanging net protection device;

[0038] The second event is compared with the fourth event and the fourth waveform of the protection device in the second waveform DC operation control and protection system to test the function and performance of the grid-connected protection device.

[0039] An extended test system suitable for the DC operation control and protection system grid connection, comprising: a grid connection control device, a grid connection protection device and a grid connection interface device;

[0040] The grid-connected control device is connected to the DC operation control and protection system and the grid-connected protection device, and is used to receive the first interface data, communication data, forwarding data of the DC operation control and protection system and the protection action signal of the grid-connected protection device, and perform control actions;

[0041] The grid-connected protection device is connected to the grid-connected control device and the DC operation control and protection system, and is used to receive the second interface data of the DC operation control and protection system and the data received by the grid-connected control system, and perform protection actions;

[0042] The mesh hanging interface device is connected to the mesh hanging protection device and the mesh hanging control device, and is used to receive and send equipment secondary signals to the mesh hanging protection device and the mesh hanging control device.

[0043] A test method applicable to the DC operation control and protection system connection, comprising:

[0044] The grid-connected control device receives the first interface data, communication data, forwarding data of the DC operation control and protection system and the protection action signal of the grid-connected protection device, and performs control actions;

[0045] The grid-connected protection device receives the second interface data of the DC operation control and protection system and the data received by the grid-connected control system, and performs a protection action;

[0046] Obtaining a first event and a first waveform during the operation of the screen hanging control device according to the control action;

[0047] Obtaining a second event and a second waveform during the operation of the hanging net protection device according to the protection action;

[0048] The first event and the first waveform are compared with the events and waveforms of the control device in the DC operation control and protection system, and the second event and the second waveform are compared with the events and waveforms of the protection device in the DC operation control and protection system, and the functions and performances of the grid-connected control device and the grid-connected protection device are tested.

[0049] An electronic device comprises: a processor and a memory, wherein the memory is used to store computer program codes, and the computer program codes include computer instructions. When the processor executes the computer instructions, the electronic device executes the test method applicable to the grid connection of a DC operation control and protection system.

[0050] The present invention discloses a test system suitable for the grid connection of a DC operation control and protection system, comprising a grid connection control device and a grid connection protection device, wherein the grid connection control device is connected to the DC operation control and protection system and the grid connection protection device, and the grid connection protection device is connected to the grid connection control device and the DC operation control and protection system. The present invention can be used for long-term grid connection testing of DC power transmission control and protection equipment to ensure that the operation program of the grid connection DC operation control and protection system is complete, and the function and performance of the device can also be verified by comparing the events and waveforms of the operation system. The scheme has a small change to the operation system, is simple to implement, and does not affect the safe and stable operation of the operation system.

[0051] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the background technology, the drawings required for use in the embodiments of the present invention or the background technology will be described below.

[0053] The drawings herein are incorporated into the specification and constitute a part of the specification. These drawings illustrate embodiments consistent with the present disclosure and, together with the specification, are used to illustrate the technical solutions disclosed in the present invention.

[0054] Figure 1 A schematic diagram of a test structure system suitable for a DC operation control and protection system to be connected to the grid provided by an embodiment of the present invention;

[0055] Figure 2 A schematic diagram of the structure of an extended test system suitable for connecting a DC operation control and protection system to the grid provided by an embodiment of the present invention;

[0056] Figure 3 A flow chart of a testing method for a DC operation control and protection system connected to the grid provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0057] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0058] The terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0059] The term "and / or" herein is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the term "at least one" herein represents any combination of at least two of any one or more of a plurality of. For example, including at least one of A, B, and C can represent including any one or more elements selected from the set consisting of A, B, and C.

[0060] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0061] In addition, in order to better illustrate the present invention, numerous specific details are provided in the following specific embodiments. It should be understood by those skilled in the art that the present invention can be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present invention.

[0062] As the brain of DC power transmission, the DC operation control and protection system is currently subject to network access standards mainly through type test inspection. The device hardware is tested through type test items, and the device software is verified through static and dynamic model test items. The above test environments are all laboratory simulations. The number of external interfaces connected to the control and protection equipment is limited, and the long-term operation reliability cannot be fully tested. When the DC operation control and protection system has a major architecture upgrade or a large-scale replacement of core chips, there is a great risk in directly carrying out engineering applications. Network-connected trial operation is an effective means to test new equipment and has been widely used in AC stations. Unlike AC measurement and control and AC protection devices that can operate independently, the DC operation control and protection system operates as a whole system and most of the devices are redundantly configured, and each device needs to work together in real time. At present, the network-connected trial operation of the existing DC operation control and protection system still refers to the AC control and protection equipment, and the external interfaces are simplified, which is quite different from the actual operating conditions. Network connection is mainly to test the reliability of the device hardware. Therefore, it is necessary to design a grid-connected test system based on the characteristics of the DC operation control and protection system. Under the premise of not affecting the operation of the DC system, as many external interfaces of the grid-connected equipment as possible should be connected to accurately simulate the actual operating conditions.

[0063] The present invention can be used for long-term grid-connected testing of DC transmission control and protection equipment to ensure that the operation program of the grid-connected DC operation control and protection system is complete. The function and performance of the device can also be verified by comparing the events and waveforms of the operating system. This solution makes little change to the operating system, is simple to implement, and does not affect the safe and stable operation of the operating system. Data is exchanged between the grid-connected control device and the grid-connected protection device. The grid-connected device only receives data sent by the operating system and does not send data or exit tripping to the operating system. Therefore, there is only one-way communication between the entire test system and the operating system, and any failure of the test system will not affect the stable operation of the operating system. In addition, the grid-connected control device is fixed to operate as a backup control system, and the grid-connected protection device is fixed to operate as an independent protection system. Since the interface data is received completely, the control and protection logic executed by the two devices can be regarded as consistent with the operating equipment, so that a complete function and performance comparison can be performed.

[0064] A test system suitable for the grid connection of a DC operation control and protection system, comprising: a grid connection control device and a grid connection protection device;

[0065] The grid-connected control device is connected to the DC operation control and protection system and the grid-connected protection device, and is used for the DC operation control and protection system to collect the first interface data, communication data, forwarding data and the protection action signal of the grid-connected protection device in the grid-connected state and perform control actions, and at the same time collect relevant events and waveforms to test the control device in the DC operation control and protection system;

[0066] The grid-connected protection device is connected to the grid-connected control device and the DC operation control and protection system, and is used for the DC operation control and protection system to collect the second interface data of the DC operation control and protection system and the data received by the grid-connected control system in the grid-connected state and to perform protection actions, while collecting related events and waveforms to test the operating status of the protection device and the power grid in the DC operation control and protection system.

[0067] Preferably, reference Figure 1 , DC operation control and protection system, including:

[0068] Protection devices, used to trip or send special signals to protect the grid according to the grid operation status;

[0069] Control device, used to obtain and control the operation status of the power grid and collect relevant data;

[0070] Measurement interfaces and other interfaces for connecting with other equipment and devices;

[0071] In this embodiment, the DC operation control and protection system includes two control devices, namely a control device A and a control device B, and three protection devices, namely a protection device A, a protection device B and a protection device C.

[0072] Preferably, the grid-connected control device is connected to the DC operation control and protection system. Figure 1 ,include:

[0073] The grid-connected control device is directly connected and communicates with each control device in the DC operation control and protection system;

[0074] The external interface function of the hanging net control device is consistent with that of control device A and control device B;

[0075] The grid-connected control device communicates directly with the measurement interface in the DC operation control and protection system;

[0076] The grid-connected control device communicates directly with other interfaces in the DC operation control and protection system;

[0077] Direct communication is one-way communication, and data can only be sent from the DC operation control and protection system to the grid-connected control device;

[0078] The network control device receives the communication data and forwards the data of the control device;

[0079] The grid-connected control device receives first interface data collected by the measurement interface and other interfaces in the DC operation control and protection system;

[0080] The first interface data is directly collected by the network control device from the measurement interface and other interfaces, and the forwarding data that cannot be directly collected is forwarded through the control device A and the control device B.

[0081] Preferably, the net hanging control device is connected to the net hanging protection device, including:

[0082] The net hanging control device is bidirectionally connected with the net hanging protection device;

[0083] The net hanging control device receives the protection action signal of the net hanging protection device;

[0084] The net hanging protection device receives the data received by the net hanging control device.

[0085] Preferably, the grid-connected protection device is connected to the DC operation control and protection system, including:

[0086] The grid-connected protection device is connected to the measurement interface in the DC operation control and protection system;

[0087] The grid-connected protection device receives the second interface data collected by the measurement interface in the DC operation control and protection system;

[0088] The external interface function of the hanging net protection device is consistent with that of the protection device A, the protection device B and the protection device C. The second interface data is directly collected by the hanging net protection device from the measurement interface without connecting to the control device A and the control device B.

[0089] Preferably, the net hanging control device comprises:

[0090] Perform control logic operation according to the communication data, the forwarding data and the first interface data;

[0091] Perform logical processing according to the protection action signal of the hanging net protection device;

[0092] According to the logic control and control logic calculation, the hanging network control parameters are obtained;

[0093] Carry out control actions according to the screen hanging control parameters;

[0094] Obtaining the first event and the first waveform during the operation of the screen hanging control device according to the control action;

[0095] The first event and the first waveform are compared with the third event and the third waveform of the control device in the DC operation control and protection system to test the function and performance of the grid-connected control device;

[0096] The hanging net control device is a standby test system and cannot be upgraded to the duty state.

[0097] Preferably, the hanging net protection device comprises:

[0098] Perform protection logic operation according to the second interface data and the data received by the network control device to obtain network protection parameters;

[0099] Implement protection actions according to the protection parameters of the hanging net;

[0100] According to the protection action, a second event and a second waveform are obtained during the operation of the hanging net protection device;

[0101] The fourth event and the fourth waveform of the protection device in the second event and the second waveform DC operation control and protection system are compared to test the function and performance of the grid-connected protection device;

[0102] The net-hanging protection device operates independently and cannot trip at the outlet.

[0103] Example 2

[0104] An extended test system suitable for DC operation control and protection system connection, reference Figure 2 , including: a net hanging control device, a net hanging protection device and a net hanging interface device;

[0105] The grid-connected control device is connected to the DC operation control and protection system and the grid-connected protection device, and is used to receive the first interface data, communication data, forwarding data of the DC operation control and protection system and the protection action signal of the grid-connected protection device, and perform control actions;

[0106] The grid-connected protection device is connected to the grid-connected control device and the DC operation control and protection system, and is used to receive the second interface data of the DC operation control and protection system and the data received by the grid-connected control system, and implement protection actions;

[0107] The net hanging interface device is connected with the net hanging protection device and the net hanging control device, and is used for receiving and sending the secondary signal of the equipment to the net hanging protection device and the net hanging control device;

[0108] In a preferred embodiment, the grid-connected interface device only receives the secondary analog and input signals of the operating equipment, does not receive the secondary output signals of the operating equipment, and does not send data to the DC operation control and protection system.

[0109] Example 3

[0110] A test method suitable for DC operation control and protection system connection, reference Figure 3 ,include:

[0111] S100, the grid-connected control device receives the first interface data, communication data, forwarding data and protection action signal of the DC operation control and protection system and the grid-connected protection device, and performs a control action;

[0112] S200, the grid-connected protection device receives the second interface data of the DC operation control and protection system and the data received by the grid-connected control system, and performs a protection action;

[0113] S300, obtaining a first event and a first waveform during the operation of the screen hanging control device according to the control action;

[0114] S400, obtaining a second event and a second waveform during the operation of the hanging network protection device according to the protection action;

[0115] S500, comparing the first event and the first waveform with the event and the waveform of the control device in the DC operation control and protection system, comparing the second event and the second waveform with the event and the waveform of the protection device in the DC operation control and protection system, and testing the functions and performances of the grid-connected control device and the grid-connected protection device;

[0116] By comparing the events and waveforms of the net hanging control device and control device A and control device B, the function and performance of the net hanging control device are tested;

[0117] By comparing the events and waveforms of the netting protection device with those of protection device A, protection device B and protection device C, the function and performance of the netting protection device are tested.

[0118] Example 4

[0119] An electronic device includes: a processor and a memory, the memory is used to store computer program codes, the computer program codes include computer instructions, when the processor executes the computer instructions, the electronic device executes a test method suitable for the DC operation control and protection system to be connected to the network.

[0120] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0121] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. Those skilled in the art can also clearly understand that the descriptions of the various embodiments of the present invention have different focuses. For the convenience and brevity of description, the same or similar parts may not be repeated in different embodiments. Therefore, for parts not described or not described in detail in a certain embodiment, refer to the records of other embodiments.

[0122] In the several embodiments provided by the present invention, 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 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 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 devices or units, which can be electrical, mechanical or other forms.

[0123] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0124] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0125] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present invention is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted through the computer-readable storage medium. The computer instructions can be transmitted from a website site, computer, server or data center to another website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0126] A person skilled in the art can understand that to implement all or part of the processes in the above-mentioned embodiments, the processes can be completed by a computer program to instruct the relevant hardware, and the program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the above-mentioned method embodiments. The aforementioned storage medium includes: a read-only memory (ROM) or a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program codes.

Claims

1. A test system suitable for DC operation control and protection system connection, characterized in that: include: Net hanging control device and net hanging protection device; The grid-connected control device is connected to the DC operation control and protection system and the grid-connected protection device, and is used to collect the first interface data, communication data, forwarding data of the DC operation control and protection system and the protection action signal of the grid-connected protection device when the DC operation control and protection system is in the grid-connected state and perform control actions, and at the same time collect relevant events and waveforms to test the control device in the DC operation control and protection system; The grid-connected protection device is connected to the grid-connected control device and the DC operation control and protection system, and is used to collect the second interface data of the DC operation control and protection system and the data received by the grid-connected control device when the DC operation control and protection system is in the grid-connected state and perform protection actions, and collect relevant events and waveforms at the same time, and test the operation status of the protection device and the power grid in the DC operation control and protection system; The DC operation control and protection system comprises: Protection devices, used to trip or send special signals to protect the grid according to the grid operation status; Control device, used to obtain and control the operation status of the power grid and collect relevant data; Measurement interfaces and other interfaces for connecting with other equipment and devices; The grid-connected control device is connected to the DC operation control and protection system and includes: The grid-connected control device is directly connected and communicates with each control device in the DC operation control and protection system respectively; The grid-connected control device is directly connected and communicates with the measurement interface in the DC operation control and protection system; The grid-connected control device is directly connected and communicates with other interfaces in the DC operation control and protection system; The direct communication is one-way communication, and data can only be sent from the DC operation control and protection system to the grid-connected control device; The grid-connected control device receives communication data and forwarding data of each control device in the DC operation control and protection system; The grid-connected control device receives first interface data collected by the measurement interface and other interfaces in the DC operation control and protection system; The net hanging control device is connected to the net hanging protection device and includes: The net hanging control device is bidirectionally connected to the net hanging protection device; The net hanging control device receives the protection action signal of the net hanging protection device; The net hanging protection device receives the data received by the net hanging control device; The specific work of the hanging net control device includes: Perform control logic operation according to the communication data, the forwarding data and the first interface data; Performing logic processing according to the protection action signal of the hanging net protection device; According to the logic control and control logic, the hanging net control parameters are calculated; Carry out control actions according to the screen hanging control parameters; Obtaining a first event and a first waveform during the operation of the screen hanging control device according to the control action; Comparing the first event and the first waveform with the third event and the third waveform of the control device in the DC operation control and protection system, and testing the function and performance of the grid-connected control device; The specific work of the hanging net protection device includes: Perform protection logic operation according to the second interface data and the data received by the network control device to obtain network protection parameters; Implement protection actions according to the protection parameters of the hanging net; Obtaining a second event and a second waveform during the operation of the hanging net protection device according to the protection action; The second event and the fourth event and the fourth waveform of the protection device in the second waveform DC operation control and protection system are compared to test the function and performance of the grid-connected protection device.

2. A test system suitable for DC operation control and protection system networking according to claim 1, characterized in that: The grid-connected protection device is connected to the DC operation control and protection system and includes: The grid-connected protection device is connected to the measurement interface in the DC operation control and protection system; The grid-connected protection device receives second interface data collected by the measurement interface in the DC operation control and protection system.

3. An extended test system suitable for DC operation control and protection system connection, characterized in that: include: Net hanging control device, net hanging protection device and net hanging interface device; The grid-connected control device is connected to the DC operation control and protection system and the grid-connected protection device, and is used to receive the first interface data, communication data, forwarding data of the DC operation control and protection system and the protection action signal of the grid-connected protection device, perform control actions, and obtain relevant events and waveforms for testing; The grid-connected protection device is connected to the grid-connected control device and the DC operation control and protection system, and is used to receive the second interface data of the DC operation control and protection system and the data received by the grid-connected control system, perform protection actions, and obtain relevant events and waveforms for testing; The meshing interface device is connected to the meshing protection device and the meshing control device, and is used to receive and send equipment secondary signals to the meshing protection device and the meshing control device; The DC operation control and protection system comprises: Protection devices, used to trip or send special signals to protect the grid according to the grid operation status; Control device, used to obtain and control the operation status of the power grid and collect relevant data; Measurement interfaces and other interfaces for connecting with other equipment and devices; The grid-connected control device is connected to the DC operation control and protection system and includes: The grid-connected control device is directly connected and communicates with each control device in the DC operation control and protection system respectively; The grid-connected control device is directly connected and communicates with the measurement interface in the DC operation control and protection system; The grid-connected control device is directly connected and communicates with other interfaces in the DC operation control and protection system; The direct communication is one-way communication, and data can only be sent from the DC operation control and protection system to the grid-connected control device; The grid-connected control device receives communication data and forwarding data of each control device in the DC operation control and protection system; The grid-connected control device receives first interface data collected by the measurement interface and other interfaces in the DC operation control and protection system; The net hanging control device is connected to the net hanging protection device and includes: The net hanging control device is bidirectionally connected to the net hanging protection device; The net hanging control device receives the protection action signal of the net hanging protection device; The net hanging protection device receives the data received by the net hanging control device; The specific work of the hanging net control device includes: Perform control logic operation according to the communication data, the forwarding data and the first interface data; Performing logic processing according to the protection action signal of the hanging net protection device; According to the logic control and control logic, the hanging net control parameters are calculated; Carry out control actions according to the screen hanging control parameters; Obtaining a first event and a first waveform during the operation of the screen hanging control device according to the control action; Comparing the first event and the first waveform with the third event and the third waveform of the control device in the DC operation control and protection system, and testing the function and performance of the grid-connected control device; The specific work of the hanging net protection device includes: Perform protection logic operation according to the second interface data and the data received by the network control device to obtain network protection parameters; Implement protection actions according to the protection parameters of the hanging net; Obtaining a second event and a second waveform during the operation of the hanging net protection device according to the protection action; The second event and the fourth event and the fourth waveform of the protection device in the second waveform DC operation control and protection system are compared to test the function and performance of the grid-connected protection device.

4. A test method suitable for DC operation control and protection system connection, characterized in that: Based on the implementation of the test system applicable to the DC operation control and protection system grid connection as claimed in claim 1 or 2, the test method includes: The grid-connected control device receives the first interface data, communication data, forwarding data and protection action signal of the DC operation control and protection system and the grid-connected protection device, and performs control actions; The grid-connected protection device receives the second interface data of the DC operation control and protection system and the data received by the grid-connected control device, and performs protection actions; Obtaining the first event and the first waveform during the operation of the screen hanging control device according to the control action; According to the protection action, a second event and a second waveform are obtained during the operation of the hanging net protection device; The first event and the first waveform are compared with the third event and the third waveform of the control device in the DC operation control and protection system, and the second event and the second waveform are compared with the fourth event and the fourth waveform of the protection device in the DC operation control and protection system to test the functions and performances of the grid-connected control device and the grid-connected protection device.

5. An electronic device, characterized in that: include: A processor and a memory, wherein the memory is used to store computer program codes, wherein the computer program codes include computer instructions. When the processor executes the computer instructions, the electronic device executes a test method applicable to a DC operation control and protection system for grid connection as described in claim 4.

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