High voltage working method and working device of high voltage direct current transmission converter station

Abstract

The present invention provides a high-voltage working method and working device of a high-voltage direct current transmission converter station, which separates an alternating current (PLC) filter of the high-voltage direct current transmission converter station; adjusts a reactor and a tuning element thereof in the high-voltage direct current transmission converter station based on the AC PLC filter; simulates the operating states of the AC PLC filter, the reactor and the tuning element thereof, respectively, and decomposes them through simulation analysis; installs a bypass switch and an isolating knife switch on the AC PLC filter, and when any device among the AC PLC filter, the reactor and the tuning element fails, the failed PLC device is bypassed and isolated by quickly closing the bypass circuit breaker, so as to realize the isolation of the fault without power outage of the high-voltage direct current transmission system, and carry out emergency maintenance of the equipment failure without affecting the DC transmission power.

Description

Technical Field

[0001] The present invention relates to the field of high-voltage direct current transmission, and in particular to a high-voltage working method and a working device of a high-voltage direct current transmission converter station. Background Art

[0002] The high-voltage direct current transmission system is a very important energy transmission system in the power system. In order to avoid the interference of high-frequency harmonics generated by the high-voltage direct current transmission system (HVDC) converter valve on the power carrier communication, PLC filters are usually installed on the AC / DC side of the converter station. The typical value of the power line carrier communication frequency range used in my country is 40kHz to 500kHz.

[0003] The design of the PLC filter is mainly to reduce the high-frequency harmonic noise in the power carrier frequency band of the AC bus output by the converter valve. However, the AC PLC noise filter tuning element overheats and the tuning capacitor burns out, causing the DC system to shut down. Summary of the invention

[0004] The object of the present invention is to provide a high voltage working method and a working device of a high voltage direct current transmission converter station, so as to solve the problem of shutdown of the direct current system in the prior art.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] According to one aspect of the present invention, the present invention provides a high-voltage working method of a high-voltage direct current transmission converter station, comprising: separating an AC PLC filter of the high-voltage direct current transmission converter station; adjusting a reactor and a tuning element thereof in the high-voltage direct current transmission converter station based on the AC PLC filter; simulating the operating states of the AC PLC filter, the reactor and the tuning element thereof, respectively, and decomposing them through simulation analysis; installing a bypass switch and an isolating knife switch on the AC PLC filter, and when any device among the AC PLC filter, the reactor and the tuning element fails, the faulty PLC device is bypassed and isolated by quickly closing the bypass circuit breaker, thereby realizing the isolation of the fault without power outage in the high-voltage direct current transmission system.

[0007] According to one aspect of the present disclosure, a high-voltage working device of a high-voltage direct current transmission converter station is provided, comprising: a separation module, used to separate an AC PLC filter of the high-voltage direct current transmission converter station; an adjustment module, used to adjust the reactor and its tuning element in the high-voltage direct current transmission converter station based on the AC PLC filter; a simulation module, used to simulate the operating states of the AC PLC filter, the reactor and its tuning element, respectively, and decompose them through simulation analysis; an isolation module, used to install a bypass switch and an isolation knife switch on the AC PLC filter, when any device among the AC PLC filter, the reactor and the tuning element fails, the faulty PLC device is bypassed and isolated by quickly closing the bypass circuit breaker, so as to achieve non-stop power supply and fault isolation of the high-voltage direct current transmission system.

[0008] According to one aspect of the present disclosure, a computer-readable program medium is provided, which stores computer program instructions. When the computer program instructions are executed by a computer, the computer is caused to execute the above method.

[0009] According to one aspect of the present disclosure, an electronic device is provided, including: a processor; and a memory, wherein computer-readable instructions are stored in the memory, and when the computer-readable instructions are executed by the processor, the above method is implemented.

[0010] It can be seen from the above technical solutions that the embodiments of the present invention have at least the following advantages and positive effects:

[0011] In the technical solutions provided in some embodiments of the present invention, the AC PLC filter of the high-voltage direct current transmission converter station is separated; the reactor and its tuning element in the high-voltage direct current transmission converter station are adjusted based on the AC PLC filter; the operating states of the AC PLC filter, the reactor and its tuning element are simulated respectively, and decomposed through simulation analysis; a bypass switch and an isolating knife switch are installed on the AC PLC filter, and when any device among the AC PLC filter, the reactor and the tuning element fails, the faulty PLC device is bypassed and isolated by quickly closing the bypass circuit breaker, so as to realize the isolation of the fault without power outage of the high-voltage direct current transmission system, and carry out emergency maintenance of the equipment failure without affecting the DC transmission power. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The present invention is a flow chart of a high voltage working method of a high voltage direct current transmission converter station according to an exemplary embodiment.

[0013] Figure 2 It is a schematic flow chart showing separation of an AC PLC filter of a high-voltage direct current transmission converter station according to an exemplary embodiment.

[0014] Figure 3 This is a simplified diagram of the equipment structure of a conventional converter station.

[0015] Figure 4 This is a schematic diagram of the interference level at the AC outgoing line end and the voltage and current conditions of the noise filter after the L1 inductor and its tuning element TDL1 are removed.

[0016] Figure 5 This is a schematic diagram of the interference level at the AC outgoing line end and the voltage and current conditions of the noise filter after removing the L1 inductor and tuning elements TDL1 and TDL2.

[0017] Figure 6 The invention is a block diagram of an integrated control device of a substation according to an exemplary embodiment.

[0018] Figure 7 The figure is a hardware diagram of an electronic device according to an exemplary embodiment.

[0019] Figure 8 The invention is a computer-readable storage medium showing a high voltage working method of a high voltage direct current transmission converter station according to an exemplary embodiment. DETAILED DESCRIPTION

[0020] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially used for illustration purposes rather than for limiting the present invention.

[0021] The high-voltage direct current transmission system is a very important energy transmission system in the power system. In order to avoid the interference of high-frequency harmonics generated by the high-voltage direct current transmission system (HVDC) converter valve on the power carrier communication, PLC filters are usually installed on the AC / DC side of the converter station. The typical value of the power line carrier communication frequency range used in my country is 40kHz to 500kHz.

[0022] The design of the PLC filter is mainly to reduce the high-frequency harmonic noise in the power carrier frequency band of the AC bus output by the converter valve. However, the AC PLC noise filter tuning element overheats and the tuning capacitor burns out, causing the DC system to shut down.

[0023] In addition, since the Jinzhong DC transmission system was put into operation in 2016, there have been three incidents of DC system shutdowns due to overheating of the leads of the AC PLC noise filter tuning components and burning of the tuning capacitors. In recent years, there have been many incidents of smoke and fire in the AC PLC filter tuning components of the converter stations in the Southern Power Grid system. The equipment failures all occurred during the peak summer period when the DC system was operating at full load. After the AC PLC filter fails, the DC system needs to be shut down before the fault can be handled. The entire maintenance process takes about 12 hours, and the loss of electricity is about 19 million kWh, resulting in serious water abandonment in Yunnan hydropower.

[0024] According to an embodiment of the present disclosure, a high voltage operation method of a high voltage direct current transmission converter station is provided, such as Figures 1 to 5 As shown, the high voltage working method of the high voltage direct current transmission converter station includes:

[0025] Step S110, separating the AC PLC filter of the high-voltage direct current transmission converter station;

[0026] Step S120: adjusting the reactor and its tuning element in the high-voltage direct current transmission converter station based on the AC PLC filter;

[0027] Step S130, simulating the operating states of the AC PLC filter, the reactor and its tuning element, and decomposing them through simulation analysis;

[0028] Step S140, installing a bypass switch and an isolating knife switch on the AC PLC filter. When any device among the AC PLC filter, the reactor and the tuning element fails, the failed PLC device is bypassed and isolated by quickly closing the bypass circuit breaker, so as to realize the isolation of the fault without power outage in the high-voltage direct current transmission system.

[0029] like Figures 1 to 5 As shown, in some embodiments of the present invention, based on the above-mentioned scheme, the AC PLC filter of the high-voltage direct current transmission converter station is separated; based on the AC PLC filter, the reactor and its tuning element in the high-voltage direct current transmission converter station are adjusted; the operating states of the AC PLC filter, the reactor and its tuning element are simulated respectively, and decomposed through simulation analysis; a bypass switch and an isolating knife switch are installed on the AC PLC filter, and when any device among the AC PLC filter, the reactor and the tuning element fails, the faulty PLC device is bypassed and isolated by quickly closing the bypass circuit breaker, so as to realize the isolation of the fault without power outage of the high-voltage direct current transmission system, and carry out emergency maintenance of equipment failure without affecting the DC transmission power.

[0030] These steps are described in detail below.

[0031] In step S110, the AC PLC filter of the high-voltage direct current transmission converter station is separated;

[0032] As a part of the high-voltage DC transmission converter station, the AC PLC filter is separated from the high-voltage DC transmission converter station to facilitate the subsequent modeling of the AC PLC filter, and subsequent simulation and measurement are carried out based on the AC PLC filter as a model.

[0033] like Figures 1 to 5 As shown, the AC PLC filter of the high-voltage direct current transmission converter station is separated, including:

[0034] Step S111, establishing a high-frequency model of the AC PLC filter;

[0035] Step S112, simulating and calculating the high-frequency harmonic voltage distribution of the AC bus by Matlab, wherein the AC system adopts a system equivalent model instead of a line model, and sets a limit value for the high-frequency noise level based on a study of the interference of the high-frequency harmonics of the converter valve on the power line carrier.

[0036] Among them, according to the high-frequency voltage spectrum of the 12-pulse converter valve used in the research report on PLC filters in DC projects and the high-frequency models of equipment such as converter transformers and AC filters, the high-frequency harmonic voltage distribution of the AC bus was simulated and calculated through Matlab. The AC system used a system equivalent model instead of a line model, and set a limit value for the high-frequency noise level based on the research on the interference of the high-frequency harmonics of the converter valve on the power line carrier.

[0037] The high-frequency model of the AC PLC filter is a high-frequency voltage spectrum of a 12-pulse converter valve and an equipment model of a converter transformer and an AC filter.

[0038] like Figures 1 to 5 As shown, in step S120, the reactor and its tuning element in the high-voltage direct current transmission converter station are adjusted based on the AC PLC filter.

[0039] The reactor and its tuning element are electronic components of the high-voltage direct current transmission converter station, which play a role in adjustment. There are two reactors and two tuning elements respectively. The reactor has L1 and L2 models, and the tuning element has TDL1 and TDL2 models.

[0040] like Figures 1 to 5 As shown, in step S130, the operating states of the AC PLC filter, the reactor and its tuning elements are simulated respectively, and decomposed through simulation analysis.

[0041] The reactor and its tuning element in the high-voltage direct current transmission converter station are adjusted based on the AC PLC filter. Through modeling calculation and simulation analysis, the optimization research of canceling the reactor and its tuning element TDL of the AC PLC filter is concluded that for the high-frequency harmonics generated by the converter valve, after canceling the AC PLC filter reactors L1, L2 and tuning elements TDL1, TDL2, there is still a good high-frequency harmonic suppression effect, and it will not affect the PLC communication system on the AC inlet and outlet lines of the high-voltage direct current transmission system converter station or the PLC communication system used in other power transmission projects.

[0042] The simulating the operating states of the AC PLC filter, the reactor and its tuning elements respectively, and decomposing them through simulation analysis, includes:

[0043] Eliminating the reactor and the tuning element thereof;

[0044] The noise range of the AC PLC filter is limited to above 40kHz.

[0045] Among them, simulation calculations found that for the high-frequency harmonics generated by the converter valve, there is still a good high-frequency harmonic suppression effect after canceling the L1 inductor and tuning elements TDL1 and TDL2. There is also a high-frequency harmonic limit violation near 30kHz, but it does not affect the normal operation of the carrier communication. At the same time, by comparing the electrical quantity response of the complete PLC filter and the filter after the components are cancelled, it is found that under the same harmonic voltage source, after canceling the L1 inductor, the current and voltage in the remaining components L2 and C2 are smaller, and the actual operation requirements are met without changing the equipment parameters. After canceling the TDL2 tuning element, the current and voltage of L2 and C2 only increase by 20% compared to not canceling it, which is still lower than the rated level of the equipment.

[0046] In addition, the solution of canceling the L1 reactor and its tuning element TDL1 can effectively limit high-frequency noise above 40kHz; in the range of 30kHz to 40kHz, although the high-frequency harmonic interference level exceeds the limit, the harmonics in this frequency band do not affect the carrier communication of the AC station connected to the Guizhong Converter Station. At the same time, there is no overvoltage or overcurrent in the C2 coupling capacitor, L2 reactor and its tuning element TDL2.

[0047] like Figures 1 to 5 As shown, in step S140, a bypass switch and an isolating switch are installed on the AC PLC filter. When any device among the AC PLC filter, the reactor and the tuning element fails, the failed PLC device is bypassed and isolated by quickly closing the bypass circuit breaker, so as to achieve non-stop isolation of the high-voltage direct current transmission system, including:

[0048] By quickly closing the isolation switch, the high-voltage direct current transmission system can be powered on without power outage and fault inspection and repair can be carried out. After the fault processing is completed, the AC PLC can be put into operation online during the operation of the DC system.

[0049] Among them, the feasibility analysis of canceling the PLC filter L1, L2 reactors and their tuning elements TDL1, TDL2 is carried out through simulation analysis. After any component of the AC PLC filter reactors L1, L2 and the tuning elements TDL1, TDL2 fails, the bypass switch is quickly closed and the knife switches on both sides are opened to bypass and isolate the faulty PLC equipment, so as to achieve non-stop isolation of the high-voltage direct current transmission system and carry out emergency maintenance of equipment failure without affecting the DC transmission power.

[0050] Furthermore, when any component of the AC PLC filter reactors L1, L2 and the tuning elements TDL1, TDL2 fails, the bypass circuit breaker is quickly closed to bypass and isolate the faulty PLC equipment, thereby isolating the fault without power outage in the high-voltage DC transmission system and without affecting the power transmission capacity and reliability.

[0051] In addition, by closing the grounding switch of the AC PLC equipment, the high-voltage DC transmission system can be powered on without power outage while the fault is repaired. After the fault is repaired, the AC PLC can be put into operation during the operation of the DC system. Compared with the previous shutdown of the DC system due to AC PLC equipment failure, a single time saves about 12 hours and transmits about 19 million kWh of electricity, greatly reducing the water abandonment of hydropower in Yunnan and winning a good social reputation for the company.

[0052] The AC PLC filter is provided with a bypass switch and an isolating knife switch. When any device among the AC PLC filter, the reactor and the tuning element fails, the failed PLC device is bypassed and isolated by quickly closing the bypass circuit breaker, so as to achieve non-stop power supply and fault isolation of the high-voltage direct current transmission system, and further includes:

[0053] The bypass circuit breaker isolates the AC PLC filter so as to separate the AC PLC filter from the faulty PLC device.

[0054] The AC PLC filter is isolated by the bypass circuit breaker, and the AC PLC filter is separated from the faulty PLC device to achieve independence and controllability of the AC PLC filter, which is effectively isolated by the bypass circuit breaker.

[0055] Through the research and setting of AC PLC filter bypass switch and knife switch, when any component of AC PLC filter reactor L1, L2 and tuning element TDL1, TDL2 fails, the bypass circuit breaker is quickly closed to bypass and isolate the faulty AC PLC equipment, and the DC system is powered on for fault inspection and repair by closing the ground knife of the isolation switch. After the fault is handled, the AC PLC can be put into operation online during the operation of the DC system without affecting the power transmission capacity and reliability. Compared with the previous shutdown of the DC system for maintenance due to AC PLC equipment failure, it saves about 12 hours per time and transmits about 19 million kWh of electricity, which greatly reduces the water abandonment of Yunnan hydropower and wins a good social reputation for the company.

[0056] In addition, through modeling calculation and simulation analysis, the optimization research on eliminating the inductor and its tuning element TDL of the AC PLC filter was concluded. It was found that for the high-frequency harmonics generated by the converter valve, after eliminating the AC PLC filter inductors L1, L2 and tuning elements TDL1, TDL2, the interference level at the end of the converter station outlet and the voltage and current of the noise filter are still within the limit range, and there is still a good high-frequency harmonic suppression effect on the harmonics, which will not affect the PLC communication system on the AC outlet of the converter station or the PLC communication system used in other transmission projects.

[0057] It can be seen from the above technical solutions that the embodiments of the present invention have at least the following advantages and positive effects:

[0058] In the technical solutions provided in some embodiments of the present invention, the AC PLC filter of the high-voltage direct current transmission converter station is separated; the reactor and its tuning element in the high-voltage direct current transmission converter station are adjusted based on the AC PLC filter; the operating states of the AC PLC filter, the reactor and its tuning element are simulated respectively, and decomposed through simulation analysis; a bypass switch and an isolating knife switch are installed on the AC PLC filter, and when any device among the AC PLC filter, the reactor and the tuning element fails, the faulty PLC device is bypassed and isolated by quickly closing the bypass circuit breaker, so as to realize the isolation of the fault without power outage of the high-voltage direct current transmission system, and carry out emergency maintenance of the equipment failure without affecting the DC transmission power.

[0059] In addition, after any component of the AC PLC filter reactors L1, L2 and the tuning elements TDL1, TDL2 fails, the bypass switch is quickly closed and the knife switches on both sides are opened to bypass and isolate the faulty PLC equipment. By closing the AC PLC equipment ground knife, the high-voltage DC transmission system can be maintained without power outage while the fault is repaired. After the fault is handled, the AC PLC can be put into operation online during the operation of the DC system, so that the high-voltage DC transmission system can be isolated from the fault and repaired without power outage, without affecting the power transmission capacity and transmission reliability.

[0060] The above detailed description is a specific description of a feasible embodiment of the present invention. The embodiment is not intended to limit the patent scope of the present invention. Any equivalent implementation or modification that does not deviate from the present invention should be included in the patent scope of this case.

[0061] like Figure 6 As shown, in one embodiment, the integrated control device 200 of the substation further includes:

[0062] A separation module 210, used to separate the AC PLC filter of the high-voltage direct current transmission converter station;

[0063] An adjustment module 220, configured to adjust the reactor and its tuning element in the HVDC converter station based on the AC PLC filter;

[0064] A simulation module 230 is used to simulate the operating states of the AC PLC filter, the reactor and its tuning elements, respectively, and decompose them through simulation analysis;

[0065] The isolation module 240 is used to install a bypass switch and an isolation knife switch on the AC PLC filter. When any device among the AC PLC filter, the reactor and the tuning element fails, the faulty PLC device is bypassed and isolated by quickly closing the bypass circuit breaker, thereby realizing the isolation of the fault without power outage in the high-voltage direct current transmission system.

[0066] Refer to the following Figure 7 The electronic device 40 according to this embodiment of the present invention will be described. Figure 4 The electronic device 40 shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0067] like Figure 7 As shown, the electronic device 40 is in the form of a general computing device. The components of the electronic device 40 may include but are not limited to: at least one processing unit 41, at least one storage unit 42, and a bus 43 connecting different system components (including the storage unit 42 and the processing unit 41).

[0068] The storage unit stores program codes, which can be executed by the processing unit 41, so that the processing unit 41 executes the steps according to various exemplary embodiments of the present invention described in the above “Embodiment Method” section of this specification.

[0069] The storage unit 42 may include a readable medium in the form of a volatile storage unit, such as a random access memory unit (RAM) 421 and / or a cache memory unit 422 , and may further include a read-only memory unit (ROM) 423 .

[0070] The storage unit 42 may also include a program / utility 424 having a set (at least one) of program modules 425, such program modules 425 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.

[0071] Bus 43 may represent one or more of several types of bus structures, including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

[0072] The electronic device 40 may also communicate with one or more external devices (e.g., keyboards, pointing devices, Bluetooth devices, etc.), one or more devices that enable a user to interact with the electronic device 40, and / or any device that enables the electronic device 40 to communicate with one or more other computing devices (e.g., routers, modems, etc.). Such communication may be performed via an input / output (I / O) interface 45. Furthermore, the electronic device 40 may also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) via a network adapter 46. Figure 7 As shown, the network adapter 46 communicates with other modules of the electronic device 40 via the bus 43. It should be understood that although Figure 7 Not shown, other hardware and / or software modules may be used in conjunction with the electronic device 40, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0073] Through the description of the above implementation, it is easy for those skilled in the art to understand that the example implementation described here can be implemented by software, or by software combined with necessary hardware. Therefore, the technical solution according to the implementation of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, including several instructions to enable a computing device (which can be a personal computer, a server, a terminal device, or a network device, etc.) to execute the method according to the implementation of the present disclosure.

[0074] According to one embodiment of the present disclosure, a computer-readable storage medium is also provided, on which a program product capable of implementing the above method of the present specification is stored. In some possible implementations, various aspects of the present invention may also be implemented in the form of a program product, which includes a program code, and when the program product is run on a terminal device, the program code is used to enable the terminal device to execute the steps according to various exemplary embodiments of the present invention described in the above "Exemplary Method" section of the present specification.

[0075] refer to Figure 8 As shown, a program product 50 for implementing the above method according to an embodiment of the present invention is described, which can adopt a portable compact disk read-only memory (CD-ROM) and include program code, and can be run on a terminal device, such as a personal computer. However, the program product of the present invention is not limited thereto. In this document, a readable storage medium can be any tangible medium containing or storing a program, which can be used by or in combination with an instruction execution system, an apparatus or a device.

[0076] The program product may use any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, 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 disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0077] Computer readable signal media may include data signals propagated in baseband or as part of a carrier wave, in which readable program code is carried. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Readable signal media may also be any readable medium other than a readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0078] The program code embodied on the readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wired, optical cable, RF, etc., or any suitable combination of the foregoing.

[0079] Program code for performing the operations of the present invention may be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java, C++, etc., and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as a separate software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server. In cases involving a remote computing device, the remote computing device may be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., through the Internet using an Internet service provider).

[0080] In addition, the above-mentioned figures are only schematic illustrations of the processes included in the method according to an exemplary embodiment of the present invention, and are not intended to be limiting. It is easy to understand that the processes shown in the above-mentioned figures do not indicate or limit the time sequence of these processes. In addition, it is also easy to understand that these processes can be performed synchronously or asynchronously, for example, in multiple modules.

[0081] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings, and that various modifications and changes may be performed without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. A high voltage working method of a high voltage direct current transmission converter station, characterized in that: include: Separate the AC PLC filter of the HVDC transmission converter station; Adjusting the reactor and its tuning element in the high-voltage direct current transmission converter station based on the AC PLC filter; Simulating the operating states of the AC PLC filter, the reactor and its tuning elements respectively, and decomposing them through simulation analysis; A bypass circuit breaker and an isolating knife switch are installed on the AC PLC filter. When any device among the AC PLC filter, the reactor and the tuning element fails, the failed PLC device is bypassed and isolated by quickly closing the bypass circuit breaker, thereby realizing the isolation of the fault without power outage in the high-voltage direct current transmission system.

2. The high voltage working method of the high voltage direct current transmission converter station according to claim 1, characterized in that: The AC PLC filter of the high-voltage direct current transmission converter station is separated, comprising: Establishing a high frequency model of the AC PLC filter; The high-frequency harmonic voltage distribution of the AC bus is simulated and calculated by Matlab, in which the AC system uses a system equivalent model instead of a line model, and a limit value is set for the high-frequency noise level based on the research on the interference of high-frequency harmonics of the converter valve on the power line carrier.

3. The high voltage working method of the high voltage direct current transmission converter station according to claim 2, characterized in that: The high-frequency model of the AC PLC filter is the high-frequency voltage spectrum of the 12-pulse converter valve and the equipment model of the converter transformer and AC filter.

4. The high voltage working method of the high voltage direct current transmission converter station according to claim 3, characterized in that: The simulating the operating states of the AC PLC filter, the reactor and its tuning elements respectively, and decomposing them through simulation analysis, includes: Eliminating the reactor and the tuning element thereof; The noise range of the AC PLC filter is limited to above 40kHz.

5. The high voltage working method of the high voltage direct current transmission converter station according to claim 1, characterized in that: The AC PLC filter is provided with a bypass circuit breaker and an isolating knife switch. When any device among the AC PLC filter, the reactor and the tuning element fails, the failed PLC device is bypassed and isolated by quickly closing the bypass circuit breaker, so as to achieve non-stop isolation of the high-voltage direct current transmission system, including: By quickly closing the isolation switch, the high-voltage direct current transmission system can be powered on without power outage and fault inspection and repair can be carried out. After the fault processing is completed, the AC PLC can be put into operation online during the operation of the DC system.

6. The high voltage working method of the high voltage direct current transmission converter station according to claim 5, characterized in that: The AC PLC filter is provided with a bypass circuit breaker and an isolating knife switch. When any device among the AC PLC filter, the reactor and the tuning element fails, the failed PLC device is bypassed and isolated by quickly closing the bypass circuit breaker, so as to achieve non-stop power supply and fault isolation of the high-voltage direct current transmission system, and further includes: The bypass circuit breaker isolates the AC PLC filter so as to separate the AC PLC filter from the faulty PLC device.

7. A high voltage working device of a high voltage direct current transmission converter station, characterized in that: include: A separation module, used to separate the AC PLC filter of the high-voltage DC transmission converter station; An adjustment module, used for adjusting the reactor and its tuning element in the high-voltage direct current transmission converter station based on the AC PLC filter; A simulation module, used to simulate the operating states of the AC PLC filter, the reactor and its tuning elements, respectively, and decompose them through simulation analysis; The isolation module is used to install a bypass circuit breaker and an isolation knife switch on the AC PLC filter. When any device among the AC PLC filter, the reactor and the tuning element fails, the failed PLC device is bypassed and isolated by quickly closing the bypass circuit breaker, thereby realizing the isolation of the fault without power outage in the high-voltage direct current transmission system.

8. A computer-readable program medium, characterized in that The computer program instructions are stored therein, and when the computer program instructions are executed by a computer, the computer is caused to execute the method according to any one of claims 1 to 6.

9. An electronic device, characterized in that: include: processor; A memory having computer-readable instructions stored thereon, wherein when the computer-readable instructions are executed by the processor, the method according to any one of claims 1 to 6 is implemented.

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