Method, device and medium for judging maintenance state of power grid framework interval

Abstract

The application discloses a kind of power grid grid interval maintenance state judging method, device, equipment and medium.The method comprises: obtaining the position information of circuit breaker in target ac field, string internal isolator and string external line switch, and sending position information to ac section loss discrimination device;According to position information and preset judging logic, the maintenance state of each device in target ac field is determined by ac section loss discrimination device, wherein the maintenance state includes circuit breaker maintenance state, converter unit maintenance state and line maintenance state.Through the method of the application, the maintenance state of electrical interval in flexible HVDC converter station can be judged in real time and accurately, avoiding the time difference and misoperation risk caused by manual operation, improving the reliability and accuracy of ac section loss discrimination device.In addition, the method does not depend on manual intervention, reduces the influence of human factors on system stability, improves the safety and stability of power grid operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flexible DC converter station, and particularly relates to a method and device for judging the maintenance state of an electrical interval of a power grid framework, equipment and a medium. BACKGROUND

[0002] The AC section loss discrimination device is a protection configured in the flexible DC converter station, and the purpose is to timely lock the converter valve when the flexible DC converter station loses electrical connection with the receiving end AC power grid, so as to avoid overvoltage of the DC system. The AC section loss discrimination device needs to identify the maintenance state of the electrical interval such as the circuit breaker, line and converter unit connected thereto, so as to correctly judge the connection information thereof.

[0003] At present, the maintenance state judgment method adopted by the AC section loss discrimination device is to collect the maintenance hard panel input quantity of the circuit breaker, line and converter unit connected thereto, so as to help judge whether the electrical interval is in the maintenance state by manually putting in or withdrawing the maintenance panel. Since manual operation inevitably takes a certain time, there is a time difference between the actual state change of the interval and the state change of the device, so it is impossible to ensure that the real state of the equipment is always consistent with the state recognized by the device. In addition, frequent manual operation also has the safety hidden danger of misoperation of the maintenance panel, which may cause incorrect action of the device.

[0004] Therefore, there is an urgent need for a judgment method which can accurately judge the maintenance state of the electrical interval in real time. SUMMARY

[0005] The present application provides a method, device, equipment and medium for judging the maintenance state of an electrical interval of a power grid framework, so as to realize real-time and accurate judgment of the maintenance state of the electrical interval in the flexible DC converter station, avoid the time difference and misoperation risk caused by manual operation, and improve the reliability and accuracy of the AC section loss protection device. In addition, the method does not depend on manual intervention, reduces the influence of human factors on the stability of the system, and improves the safety and stability of the power grid operation.

[0006] According to an aspect of the present application, a method for judging the maintenance state of an electrical interval of a power grid framework is provided, comprising:

[0007] obtaining the position information of the circuit breaker, the in-string disconnector and the out-string line switch in the target AC field, and sending the position information to an AC section loss discrimination device;

[0008] determining the maintenance state of each device in the target AC field by the AC section loss discrimination device according to the position information and a preset judgment logic, wherein the maintenance state includes the circuit breaker maintenance state, the converter unit maintenance state and the line maintenance state.

[0009] According to another aspect of the present application, there is provided a device for determining the maintenance state of an interval of a power grid framework, comprising:

[0010] a position information acquisition module configured to acquire position information of circuit breakers, in-line disconnectors and out-line circuit breakers in a target AC field, and send the position information to an AC section loss discrimination device;

[0011] a maintenance state determination module configured to determine the maintenance state of each device in the target AC field according to the position information and a preset determination logic via the AC section loss discrimination device, wherein the maintenance state comprises a circuit breaker maintenance state, a converter unit maintenance state and a line maintenance state.

[0012] According to another aspect of the present application, there is provided an electronic device, comprising:

[0013] at least one processor; and

[0014] a memory communicatively connected to the at least one processor; wherein

[0015] the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to perform the method for determining the maintenance state of an interval of a power grid framework according to any one of the embodiments of the present application.

[0016] According to another aspect of the present application, there is provided a computer readable storage medium storing computer instructions for enabling a processor to perform the method for determining the maintenance state of an interval of a power grid framework according to any one of the embodiments of the present application.

[0017] The technical solution of the embodiments of the present application acquires position information of circuit breakers, in-line disconnectors and out-line circuit breakers in a target AC field, and sends the position information to an AC section loss discrimination device; determines the maintenance state of each device in the target AC field according to the position information and a preset determination logic via the AC section loss discrimination device, wherein the maintenance state comprises a circuit breaker maintenance state, a converter unit maintenance state and a line maintenance state, thereby solving the problem that the existing maintenance state determination method relies on manual input or withdrawal of maintenance pressure plates, which has the risk of time difference and misoperation, leading to incorrect operation of the device; by collecting the positions of switches and breakers in a 500kV AC field and performing certain logical processing on the collected switch quantities, the maintenance state of electrical intervals such as circuit breakers, lines and converter units can be automatically and accurately determined, thereby avoiding incorrect operation of the AC section loss protection device due to untimely updating of the collected position information or human error.

[0018] It is to be understood that the matters described in this section are not intended to identify key or essential features of the embodiments of the present application, nor are they intended to limit the scope of the present application. Other features of the present application will be apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0020] Figure 1 A flow chart of a method for judging the maintenance state of a power grid framework interval provided by the first embodiment of the present application;

[0021] Figure 2 A target AC field schematic diagram provided by the first embodiment of the present application;

[0022] Figure 3 A judgment logic diagram of the circuit breaker maintenance state being the trigger state provided by the first embodiment of the present application;

[0023] Figure 4 A judgment logic diagram of the circuit breaker maintenance state being the reset state provided by the first embodiment of the present application;

[0024] Figure 5 A judgment logic diagram of the converter unit maintenance state being the trigger state provided by the first embodiment of the present application;

[0025] Figure 6 A judgment logic diagram of the converter unit maintenance state being the reset state provided by the first embodiment of the present application;

[0026] Figure 7 A judgment logic diagram of the line maintenance state provided by the first embodiment of the present application;

[0027] Figure 8 A structural schematic diagram of a device for judging the maintenance state of a power grid framework interval provided by the second embodiment of the present application;

[0028] Figure 9 A structural schematic diagram of an electronic device provided by the third embodiment of the present application. DETAILED DESCRIPTION

[0029] In the following, the technical solutions in the embodiments of the present application will be described clearly and completely 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 of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort should belong to the scope of protection of the present application.

[0030] It should be noted that the terms "first", "second", and the like in the description and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to include only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to the process, method, product or device.

[0031] Embodiment one

[0032] Figure 1 A flowchart of a method for judging the maintenance state of an interval of a power grid framework is provided in the first embodiment of the present application. The present embodiment can be applied to the case of judging the maintenance state of an interval of a power grid framework. The method can be executed by an alternating current section power failure discrimination device. The device can be realized in the form of hardware and / or software. The device can be configured in an electronic device. As shown in the figure, the method comprises: Figure 1

[0033] S110, acquiring position information of circuit breakers, intra-string disconnectors and inter-string line disconnectors in a target alternating current field, and sending the position information to an alternating current section power failure discrimination device.

[0034] In the embodiment of the present application, the target alternating current field is a 500kV alternating current field of a flexible direct current converter station, adopts a 3 / 2 wiring mode, contains two buses of 1M and 2M, each string includes three circuit breakers of 1M side circuit breaker, middle circuit breaker and 2M side circuit breaker, two intra-string disconnectors are arranged on each side of each circuit breaker, and a line is arranged between each two circuit breakers. The line can be a line or a converter unit. If the line is a line, a disconnecting switch, i.e., an inter-string line disconnecting switch, is arranged on the line.

[0035] ​The 3 / 2 wiring mode is a commonly used wiring mode in a high-voltage power grid, and is particularly suitable for a power grid with a voltage level of 500 kV or above.

[0036] Figure 2 A target AC field schematic diagram is provided for the first embodiment of the application, S1 is a 1M side circuit breaker, S11 and S12 are adjacent disconnecting switches of the 1M side circuit breaker interval, S2 is a middle circuit breaker, S21 and S22 are adjacent disconnecting switches of the 1M side circuit breaker interval, S3 is a 2M side circuit breaker, S31 and S32 are adjacent disconnecting switches of the 2M side circuit breaker interval, and S36 is a string external line knife switch corresponding to a line outgoing line.

[0037] The target AC field includes 1M and 2M two buses, which are the main power transmission channels of the system and are responsible for power collection and distribution. Each string includes three circuit breakers, which are 1M side circuit breakers, middle circuit breakers and 2M side circuit breakers. These circuit breakers play a key role in breaking and connecting circuits in the system, and each circuit breaker is equipped with two string internal disconnecting switches on both sides. A outgoing line is drawn between every two circuit breakers, which can be a transmission line or an output line of a converter unit; if it is a line outgoing line, an additional knife switch is configured on the outgoing line. The 3 / 2 wiring mode adopted by the target AC field of the flexible DC converter station is a high-efficiency, reliable and flexible wiring mode, which can meet the requirements of high-voltage power grid on transmission capacity and safety.

[0038] In the embodiment of the application, the position information of the circuit breakers, the string internal disconnecting switches and the string external line knife switches in the target AC field is obtained, including: determining the position information through auxiliary switch contacts associated with the circuit breakers, the string internal disconnecting switches and the knife switches, and sending the position information to the AC section loss-of-field determination device.

[0039] The position information is a closed position or an open position, and the auxiliary switch contacts are used to obtain the position information of the key equipment (circuit breakers, disconnecting switches and knife switches) in the target AC field. The auxiliary switch contacts are usually connected with the operating mechanism of the equipment and can reflect the actual position state of the equipment, i.e., whether the equipment is in a closed position or an open position.

[0040] Specifically, when the position of the circuit breaker, disconnector or disconnecting switch changes, the auxiliary switch contacts linked therewith also change state accordingly. This change in state can be detected and converted into position information, i.e. closed or open. Subsequently, this information is sent to the AC section loss-of-voltage discrimination device. The AC section loss-of-voltage discrimination device is a device or system for judging whether the AC section is loss-of-voltage, which receives position information from the circuit breaker, disconnector and disconnecting switch and judges whether the AC section is loss-of-voltage based on the information.

[0041] S120, determining the maintenance state of each device in the target AC field according to the position information and preset judgment logic through the AC section loss-of-voltage discrimination device.

[0042] The preset judgment logic is a pre-set rule or algorithm, and the maintenance state refers to whether the device is in a state requiring inspection or repair. The maintenance state includes the circuit breaker maintenance state, the converter unit maintenance state and the line maintenance state.

[0043] Specifically, the AC section loss-of-voltage discrimination device can determine the maintenance state of each device in the target AC field according to the position information and the preset judgment logic.

[0044] In the embodiment of the application, the determination of the maintenance state of each device in the target AC field according to the position information and the preset judgment logic through the AC section loss-of-voltage discrimination device includes: if at least two phases of the three phases of the circuit breaker are open, it is determined that the position information of the circuit breaker is open; if at least two phases of the three phases of the circuit breaker are closed, it is determined that the position information of the circuit breaker is closed; and the maintenance state of the circuit breaker in the target AC field is determined based on the position information of the circuit breaker.

[0045] Specifically, the position information of the circuit breaker can be determined according to the state of each phase of the circuit breaker, i.e. according to open or closed. Then, the maintenance state of the circuit breaker in the target AC field is determined based on the position information of the circuit breaker.

[0046] In the embodiment of the application, the circuit breaker maintenance state includes the trigger state and the reset state, and the determination of the maintenance state of the circuit breaker in the target AC field based on the position information of the circuit breaker includes: if the position information of the circuit breaker is open and at least one of the in-string disconnectors on both sides of the circuit breaker is open, the maintenance state of the circuit breaker is the trigger state; and if the position information of the circuit breaker is closed and all the in-string disconnectors on both sides of the circuit breaker are closed, the maintenance state of the circuit breaker is the reset state.

[0047] Specifically, the judgment logic of the circuit breaker maintenance state is further refined, and the circuit breaker maintenance state is divided into the trigger state and the reset state. For example, Figure 3As shown, Figure 3 The following is a logic diagram for determining the circuit breaker's maintenance status as a triggered state, provided in Embodiment 1 of the present invention. When the circuit breaker's position information is in the open position, the series disconnect switches on both sides of the circuit breaker are checked simultaneously. If at least one series disconnect switch is also in the open position, the circuit breaker's maintenance status is determined to be in the triggered state, meaning that the circuit breaker is electrically isolated from the system, and the corresponding bay or system grid is in a maintainable state. Figure 4 As shown, Figure 4 The following is a logic diagram for determining the maintenance status of a circuit breaker as a reset state, provided in Embodiment 1 of the present invention. When the position information of the circuit breaker is closed, the series disconnect switches on both sides of the circuit breaker are checked simultaneously. If all series disconnect switches are closed, the maintenance status of the circuit breaker is determined to be a reset state, which means that the circuit breaker is connected to the system and the corresponding bay or system grid is in a state that cannot be maintained.

[0048] In this embodiment of the invention, the maintenance status of the converter unit includes a triggered status and a reset status. The step of determining the maintenance status of each device in the target AC field based on the location information and preset judgment logic through the AC section power failure discrimination device includes: if both the side circuit breaker and the intermediate circuit breaker meet the maintenance status of the triggered status, then the maintenance status of the converter unit is the triggered status; if only one of the side circuit breaker and the intermediate circuit breaker meets the maintenance status of the reset status, then the maintenance status of the converter unit is the reset status.

[0049] Specifically, the maintenance status of the converter unit is also subdivided into trigger status and reset status. For example... Figure 5 As shown, Figure 5 This is a logic diagram for determining the maintenance state of a converter unit as a triggered state, provided in Embodiment 1 of the present invention. When both the side circuit breaker and the intermediate circuit breaker satisfy the condition of being in a triggered maintenance state, the maintenance state of the converter unit is determined to be in a triggered state. This means that the converter unit or its associated circuit breaker is electrically isolated, and the relevant bay or grid structure is in a maintainable state. Figure 6 As shown, Figure 6 The following is a logic diagram for determining the maintenance status of a converter unit as a reset state, provided in Embodiment 1 of the present invention. When either the side circuit breaker or the intermediate circuit breaker satisfies the condition of a reset state, the maintenance status of the converter unit is determined to be reset. This means that the converter unit and its associated circuit breaker are in a connected state, while the related bay or grid structure is in a state where maintenance is not possible.

[0050] Through this judgment logic, the embodiments of the present invention can more accurately reflect the maintenance status of the converter unit, providing strong support for the stable operation and timely maintenance of the power system. At the same time, this method also simplifies the process of judging the maintenance status and improves work efficiency.

[0051] In the embodiment of the present application, the maintenance state of each device in the target AC field is determined by the AC section loss discrimination device according to the position information and the preset judgment logic, including: if the side breaker and the intermediate breaker both meet the maintenance state as the trigger state, or the string external line switch is in the split position, then the line maintenance state is in the trigger state; if any one of the side breaker and the intermediate breaker meets the maintenance state as the reset state, and the string external line switch is in the closed position, then the line maintenance state is in the reset state.

[0052] Specifically, how to determine the maintenance state of the line in the target AC field is further described in detail. The maintenance state of the line is also divided into trigger state and reset state. As shown in Figure 7 Figure 7 The judgment logic diagram of the line maintenance state provided for the first embodiment of the present application is shown in the figure. When the side breaker and the intermediate breaker both meet the maintenance state as the trigger state, or the string external line switch is in the split position, it is judged that the maintenance state of the line is in the trigger state, which means that the line is electrically isolated from the system, and the related interval or network frame is in a state that can be maintained. When any one of the side breaker or the intermediate breaker meets the maintenance state as the reset state, and the string external line switch is in the closed position, it is judged that the maintenance state of the line is in the reset state, which means that the line is normally connected with its related devices, and the related interval or network frame is in a state that cannot be maintained. Through such judgment logic, the embodiment of the present application can comprehensively consider various possible situations of the line maintenance state, ensuring the accuracy and reliability of the judgment result. This is helpful for the stable operation and timely maintenance of the power system, and improves the overall performance and safety of the power system.

[0053] The technical scheme of the embodiment of the present application acquires the position information of the breaker, the string internal disconnector and the string external line switch in the target AC field, and sends the position information to the AC section loss discrimination device; determines the maintenance state of each device in the target AC field by the AC section loss discrimination device according to the position information and the preset judgment logic, wherein the maintenance state includes the breaker maintenance state, the converter unit maintenance state and the line maintenance state, solves the problem that the existing maintenance state discrimination method relies on manual input or exit of the maintenance pressure plate, and such method has the risk of time difference and misoperation, leading to incorrect action of the device, by collecting the positions of the switches and switches in the 500kV AC field, and performing certain logical processing on the collected switch quantity, the maintenance state of the electrical interval such as the breaker, the line and the converter unit can be automatically and accurately judged, avoiding incorrect action of the AC section loss protection device due to untimely update of the collected position information or human error.

[0054] Embodiment two

[0055] Figure 8 ​A structural schematic diagram of a device for judging the maintenance state of an interval of a power grid framework is provided for Embodiment Two of the present application. As shown in Figure 8 the device comprises:

[0056] A position information acquisition module 210 is configured to acquire position information of circuit breakers, in-string disconnectors and out-of-string line disconnectors in a target AC field, and send the position information to an AC section loss-of-field discrimination device;

[0057] A maintenance state determination module 220 is configured to determine the maintenance state of each device in the target AC field according to the position information and a preset judgment logic through the AC section loss-of-field discrimination device, wherein the maintenance state comprises a circuit breaker maintenance state, a converter unit maintenance state and a line maintenance state.

[0058] The technical solution of the embodiment of the present application acquires the position information of circuit breakers, in-string disconnectors and out-of-string line disconnectors in a target AC field, and sends the position information to an AC section loss-of-field discrimination device; determines the maintenance state of each device in the target AC field according to the position information and a preset judgment logic through the AC section loss-of-field discrimination device, wherein the maintenance state comprises a circuit breaker maintenance state, a converter unit maintenance state and a line maintenance state, solves the problem that the existing maintenance state discrimination method relies on manual input or withdrawal of maintenance pressure plates, and such a method has the risk of time difference and misoperation, leading to incorrect action of the device, and through collection of switch positions in a 500kV AC field and certain logical processing of the collected switch quantities, the maintenance state of electrical intervals such as circuit breakers, lines and converter units can be automatically and accurately judged, avoiding incorrect action of an AC section loss-of-field protection device due to untimely update of collected position information or human misoperation.

[0059] Optionally, the target AC field is a 500kV AC field of a flexible DC converter station, adopts a 3 / 2 wiring mode, contains two busbars of 1M and 2M, each string includes three circuit breakers of a 1M side circuit breaker, a middle circuit breaker and a 2M side circuit breaker, each circuit breaker is equipped with two disconnectors on both sides, and there is a outgoing line between each two circuit breakers, which can be a line or a converter unit, and if it is a line outgoing line, a disconnector is configured on the outgoing line.

[0060] Optionally, the position information acquisition module 210 is specifically configured to:

[0061] determine the position information through auxiliary switch contacts linked with the circuit breakers, the in-string disconnectors and the out-of-string line disconnectors, and send the position information to the AC section loss-of-field discrimination device, wherein the position information is a closed position or an open position.

[0062] Optionally, the maintenance state determination module 220 comprises:

[0063] The circuit breaker position information determination module is configured to determine that the position information of the circuit breaker is the split position if at least two phases of the three phases of the circuit breaker are in the split position; and determine that the position information of the circuit breaker is the closed position if at least two phases of the three phases of the circuit breaker are in the closed position.

[0064] The circuit breaker maintenance state determination module is configured to determine the maintenance state of the circuit breaker in the target AC field based on the position information of the circuit breaker.

[0065] Optionally, the circuit breaker maintenance state includes a trigger state and a reset state, and the circuit breaker maintenance state determination module is specifically configured to:

[0066] If the position information of the circuit breaker is the split position, and at least one of the string internal disconnectors on both sides of the circuit breaker is in the split position, the maintenance state of the circuit breaker is the trigger state.

[0067] If the position information of the circuit breaker is the closed position, and all the string internal disconnectors on both sides of the circuit breaker are in the closed position, the maintenance state of the circuit breaker is the reset state.

[0068] Optionally, the converter unit maintenance state includes a trigger state and a reset state, and the maintenance state determination module 320 includes a converter unit maintenance state determination module configured to:

[0069] If the edge circuit breaker and the intermediate circuit breaker both satisfy the maintenance state being the trigger state, the maintenance state of the converter unit is the trigger state.

[0070] If the edge circuit breaker and the intermediate circuit breaker individually satisfy the maintenance state being the reset state, the maintenance state of the converter unit is the reset state.

[0071] Optionally, the maintenance state determination module 220 includes a line maintenance state determination module configured to:

[0072] If the edge circuit breaker and the intermediate circuit breaker both satisfy the maintenance state being the trigger state, or the string external line switch is in the split position, the line maintenance state is the trigger state.

[0073] If any one of the edge circuit breaker and the intermediate circuit breaker satisfies the maintenance state being the reset state, and the string external line switch is in the closed position, the line maintenance state is the reset state.

[0074] The power grid network frame interval maintenance state determination device provided in the embodiments of the present application can execute the power grid network frame interval maintenance state determination method provided in any of the embodiments of the present application, has the function modules and beneficial effects corresponding to the execution method.

[0075] Embodiment four

[0076] Figure 9 A structural schematic of an electronic device is provided for Embodiment Three of the present application. The electronic device is intended to represent various forms of digital computers, such as laptops, desktops, tablets, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular telephones, smart phones, wearable devices (e.g., headsets, glasses, watches, etc.), and other similar computing devices. The components shown here, their connections, and their functions, as described above, are meant to be examples only, and are not intended to limit the implementations of the present application as described and / or claimed herein.

[0077] As shown in FIG. 1, the electronic device 10 includes at least one processor 11, and a memory, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., connected in communication with the at least one processor 11, wherein the memory stores a computer program executable by the at least one processor. The processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or loaded into the random access memory (RAM) 13 from the storage unit 18. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14. Figure 9

[0078] Various components in the electronic device 10 are connected to the I / O interface 15, including an input unit 16, such as a keyboard, a mouse, etc., an output unit 17, such as various types of displays, a speaker, etc., a storage unit 18, such as a magnetic disk, an optical disk, etc., and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network, such as the Internet, and / or various telecommunication networks.

[0079] The processor 11 can be various general and / or special-purpose processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 performs various methods and processes described above, such as the method for determining the maintenance state of the grid network interval.

[0080] ​In some embodiments, the method of determining the grid network bay maintenance state can be implemented as a computer program tangibly embodied in a computer readable storage medium, e.g., storage unit 18. In some embodiments, parts or all of the computer program can be loaded and / or installed onto electronic device 10 via, e.g., ROM 12 and / or communication unit 19. When the computer program is loaded onto RAM 13 and executed by processor 11, one or more steps of the method of determining the grid network bay maintenance state described above can be performed. Alternatively, in other embodiments, processor 11 can be configured to perform the method of determining the grid network bay maintenance state by way of other means, e.g., with the aid of firmware.

[0081] Various implementations of the systems and techniques described above can be realized in digital electronic circuitry, integrated circuitry, a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on a chip (SOC), a programmable logic device (PLD), a computer hardware, firmware, software, and / or combinations thereof. These various implementations can include implementation in one or more computer programs that are executable and / or interpretable on a programmable system including at least one programmable processor, which can be special or general purpose, coupled to receive data and instructions from, and to transmit data and instructions to, a storage system, at least one input device, and at least one output device.

[0082] Computer programs used to implement the processes of the present application can be written in any combination of one or more programming languages. These computer programs can be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the computer program, when executed, implements the functions / acts specified in the flowcharts and / or block diagrams. The computer program can be executed entirely on a machine, partially on a machine, partially on a machine as a stand-alone software package, partially on a machine and partially on a remote machine or entirely on a remote machine or server.

[0083] In the context of the present application, a computer-readable storage medium can be a tangible medium that can contain or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer-readable storage medium can include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium can be a machine-readable signal medium. More specific examples of a machine-readable storage medium will include one or more lines of a program of instructions in a transitory signal, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0084] To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user and a keyboard and a pointing device (e.g., a mouse or a trackball) by which the user can provide input to the electronic device. Other kinds of devices can be used to provide for interaction with a user as well; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form, including acoustic, speech, or tactile input.

[0085] The systems and techniques described here can be implemented in a computing system that includes a back end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front end component (e.g., a user computer having a graphical user interface or a Web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back end, middleware, or front end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0086] The computing system can include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system, to solve the defects of large management difficulty and weak business scalability in traditional physical host and VPS service.

[0087] It should be understood that the various forms of flow shown above can be used to reorder, add or delete steps. For example, each step described in the present application can be executed in parallel, sequentially or in a different order, as long as the desired results of the technical solutions of the present application can be achieved, which is not limited herein.

[0088] The above detailed description does not constitute a limitation on the scope of protection of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A method for determining the maintenance status of power grid bays, characterized in that, include: Obtain the location information of the target AC field circuit breaker, the intra-series disconnect switch and the inter-series disconnect switch, and send the location information to the AC section power failure detection device; Based on the location information and preset judgment logic, the maintenance status of each device in the target AC field is determined by the AC section power failure judgment device. The maintenance status includes the circuit breaker maintenance status, the converter unit maintenance status, and the line maintenance status. Determining the maintenance status of the target AC field circuit breaker based on its location information includes: If the position information of the circuit breaker is in the open position, and at least one of the disconnect switches in the series on both sides of the circuit breaker is in the open position, then the maintenance status of the circuit breaker is the triggered state. If the position information of the circuit breaker is closed, and all the disconnect switches in the series on both sides of the circuit breaker are closed, then the maintenance status of the circuit breaker is the reset status. The maintenance status of the converter unit includes a triggered state and a reset state. The determination of the maintenance status of each device in the target AC field based on the location information and preset judgment logic using the AC section power failure detection device includes: If both the side circuit breaker and the intermediate circuit breaker meet the condition of being in the maintenance state and being in the triggered state, then the converter unit is in the maintenance state and is in the triggered state. If either the side circuit breaker or the intermediate circuit breaker is in the reset state during maintenance, then the converter unit is in the reset state during maintenance. If both the side circuit breaker and the intermediate circuit breaker meet the condition of being in the maintenance state and being in the triggered state, or if the external disconnect switch of the line string is in the open position, then the line maintenance state is in the triggered state. If either the side circuit breaker or the intermediate circuit breaker satisfies the condition of being in the reset state during maintenance, and the external disconnect switch of the line series is closed, then the line maintenance state is the reset state.

2. The method for determining the maintenance status of power grid bays according to claim 1, characterized in that, The target AC field is a 500kV AC field of a flexible DC converter station, which adopts a 3 / 2 connection method and includes two busbars, 1M and 2M. Each string includes three circuit breakers: a 1M side circuit breaker, an inter-circuit breaker, and a 2M side circuit breaker. Each circuit breaker is equipped with two in-string disconnect switches on both sides. There is an outgoing line between every two circuit breakers. This outgoing line is either a line outgoing line or a converter unit. If it is a line outgoing line, an external line disconnect switch is configured on the line outgoing line.

3. The method for determining the maintenance status of power grid bays according to claim 1, characterized in that, The acquisition of the location information of the target AC circuit breaker, the intra-string disconnector, and the inter-string disconnector includes: The position information is determined by the auxiliary switch contacts that are linked with the circuit breaker, the intra-string disconnector, and the disconnector, and the position information is sent to the AC section power failure detection device, wherein the position information is either closed or open.

4. The method for determining the maintenance status of power grid bays according to claim 1, characterized in that, The step of determining the maintenance status of each device in the target AC field based on the location information and preset judgment logic through the AC section power failure detection device includes: If at least two of the three phases of the circuit breaker are in the open position, the position information of the circuit breaker is determined to be in the open position; if at least two of the three phases of the circuit breaker are in the closed position, the position information of the circuit breaker is determined to be in the closed position.

5. A device for determining the maintenance status of a power grid frame interval, characterized in that, include: The location information acquisition module is used to acquire the location information of the target AC field circuit breaker, the intra-series disconnect switch and the inter-series line disconnect switch, and send the location information to the AC section power failure discrimination device; The maintenance status determination module is used to determine the maintenance status of each device in the target AC field based on the location information and preset judgment logic, through the AC section power failure discrimination device. The maintenance status includes the circuit breaker maintenance status, the converter unit maintenance status, and the line maintenance status. The circuit breaker maintenance status determination module is specifically used for: If the position information of the circuit breaker is in the open position, and at least one of the disconnect switches in the series on both sides of the circuit breaker is in the open position, then the maintenance status of the circuit breaker is the triggered state. If the position information of the circuit breaker is closed, and all the disconnect switches in the series on both sides of the circuit breaker are closed, then the maintenance status of the circuit breaker is the reset status. The converter unit maintenance status includes a trigger status and a reset status. The maintenance status determination module includes: a converter unit maintenance status determination module, used for: If both the side circuit breaker and the intermediate circuit breaker meet the condition of being in the maintenance state and being in the triggered state, then the converter unit is in the maintenance state and is in the triggered state. If either the side circuit breaker or the intermediate circuit breaker is in the reset state during maintenance, then the converter unit is in the reset state during maintenance. If both the side circuit breaker and the intermediate circuit breaker meet the condition of being in the maintenance state and being in the triggered state, or if the disconnect switch of the external line is in the open position, then the line maintenance state is in the triggered state. If either the side circuit breaker or the intermediate circuit breaker satisfies the condition of being in the reset state during maintenance, and the disconnect switch of the external line is closed, then the line maintenance state is the reset state.

6. An electronic device, characterized in that, The electronic device includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the method for determining the maintenance status of the power grid bay as described in any one of claims 1-4.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that are used to cause a processor to execute the method for determining the maintenance status of the power grid frame interval as described in any one of claims 1-4.

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