Rapid mechanical switch debugging equipment and method for high-voltage direct-current circuit breaker

Abstract

The invention discloses rapid mechanical switch debugging equipment and method for a high-voltage direct-current circuit breaker. Relates to the field of flexible direct-current power transmission and solves the problem that whether a rapid mechanical switch can be effectively switched on and switched off cannot be monitored. When the rapid mechanical switches are powered off, the switch control device sends opening and closing control signals to the interface device after receiving instructions, the interface device receives the control signals and controls the corresponding rapid mechanical switches to execute opening and closing operation, and the switch monitoring device monitors the opening and closing states of the rapid mechanical switches and sends data to the controller. And the controller specifically determines whether each quick mechanical switch is normal according to the monitoring data, so that corresponding processing is facilitated, and the system shutdown risk caused by the fault of a single switch is reduced. Through real-time monitoring and control, the maintenance efficiency is improved, the fault power failure time is reduced, the operation quality of the rapid mechanical switch of the high-voltage direct-current circuit breaker is effectively improved, and a guarantee is provided for stable operation of a flexible direct-current power grid.

Description

Technical Field

[0001] The present application relates to the field of flexible direct current power transmission, and in particular to a device and method for fast mechanical switch debugging of a high-voltage direct current circuit breaker. Background Art

[0002] High-voltage DC circuit breakers are the core equipment for the networking of flexible DC transmission projects, and fast mechanical switches are the core equipment of high-voltage DC circuit breakers. They can withstand load current during normal closing operation. When a line fault occurs, the fast mechanical switch must provide sufficient insulation opening distance in a very short time (2~3ms), which plays a decisive role in whether the DC circuit breaker can successfully cut off the fault.

[0003] As the voltage level of the DC system increases, the main branch of the DC circuit breaker requires multiple fast mechanical switches in series. When a fault occurs, multiple fast mechanical switches need to reach an effective opening distance in a short time to withstand the operating overvoltage. At present, the reliability of the opening and closing of multiple fast mechanical switches is not very high. Once a single fast mechanical switch fails to open and close, it will directly affect the failure and shutdown of the entire flexible DC power grid system, resulting in the inability to deliver the new energy power of the flexible DC power grid in time.

[0004] It can be seen that how to solve the problem of being unable to monitor whether a fast mechanical switch can effectively open and close the switch is a technical problem that needs to be solved urgently by people in this field. Summary of the invention

[0005] The purpose of the present application is to provide a high-voltage DC circuit breaker fast mechanical switch debugging device and method to solve the problem of being unable to monitor whether the fast mechanical switch can effectively open and close the switch.

[0006] In order to solve the above technical problems, the present application provides a high-voltage DC circuit breaker fast mechanical switch debugging device, which is applied to multiple fast mechanical switches, including:

[0007] Multiple interface devices, switch control devices, switch monitoring devices, controllers;

[0008] Each of the interface devices is connected to each of the fast mechanical switches respectively; the switch control device and the switch monitoring device are connected to each of the interface devices, and the controller is connected to the switch control device and the switch monitoring device;

[0009] When the fast mechanical switch is powered off, the controller sends an opening and closing instruction to the switch control device, so that the switch control device sends an opening and closing control signal to each of the interface devices according to the opening and closing instruction, and the interface device receives the opening and closing control signal and controls the corresponding fast mechanical switch to perform corresponding opening and closing operations; the switch monitoring device obtains the opening and closing status of the fast mechanical switch through the interface device and sends the monitoring data to the controller in real time, and the controller determines whether each of the fast mechanical switches is normal according to the opening and closing instruction and the monitoring data.

[0010] As an optional solution, the above-mentioned high-voltage DC circuit breaker fast mechanical switch debugging equipment further includes: a switch protection device;

[0011] The switch protection device is connected to each of the interface devices, and the controller is connected to the switch protection device;

[0012] The switch protection device obtains the opening and closing status of the fast mechanical switch through the interface device, and determines the abnormal break of each fast mechanical switch according to the opening and closing status of the fast mechanical switch and the opening and closing instructions sent by the controller, and controls the abnormal break of each fast mechanical switch to perform protection action.

[0013] As an optional solution, in the above-mentioned high-voltage DC circuit breaker fast mechanical switch debugging device, the interface device includes a first interface, a second interface, and an interface processor; the switch control device includes a first system and a second system;

[0014] The first interface and the second interface are connected to the first system and the second system of the switch control device respectively;

[0015] The first system and the second system simultaneously send opening and closing control signals to the first interface and the second interface of the interface device, and one of the systems acts as a main system to send opening and closing control signals carrying a duty flag, and the other system acts as a backup system to send opening and closing control signals carrying a standby flag; the interface processor receives the opening and closing control signals sent by the first interface and the second interface, parses the opening and closing control signals and executes the opening and closing control signals corresponding to the duty flag.

[0016] As an optional solution, in the above-mentioned high-voltage DC circuit breaker fast mechanical switch debugging device, the interface device further includes: a charging power supply and a trigger discharge circuit; the charging power supply supplies power to the first interface and the second interface; the charging power supply charges the opening capacitor or the closing capacitor in the trigger discharge circuit;

[0017] The interface processor generates a trigger electrical signal according to the opening and closing control signal corresponding to the duty flag and sends it to the trigger discharge circuit, so that the corresponding thyristor of the trigger discharge circuit is turned on, so that the opening capacitor or the closing capacitor discharges the repulsion mechanism coil, and drives the fast mechanical switch to perform the corresponding opening or closing operation.

[0018] As an optional solution, in the above-mentioned high-voltage DC circuit breaker fast mechanical switch debugging device, the interface device also includes: two position sensors;

[0019] The two position sensors respectively obtain the opening position and closing position of the fast mechanical switch; the interface processor receives the opening position and closing position and sends them to the switch monitoring device and the switch protection device through the first interface and the second interface.

[0020] As an optional solution, in the above-mentioned high-voltage DC circuit breaker fast mechanical switch debugging equipment, the interface device also includes: a switch-off capacitor capacitance detection module and a switch-on capacitor capacitance detection module;

[0021] The opening capacitor capacitance detection module detects the opening capacitor and sends the opening capacitor capacitance to the interface processor, and the closing capacitor capacitance detection module detects the closing capacitor capacitance and sends the closing capacitor capacitance to the interface processor;

[0022] The interface processor sends the opening capacitor capacitance value and the closing capacitor capacitance value to the switch monitoring device and the switch protection device through the first interface and the second interface.

[0023] As an optional solution, in the above-mentioned high-voltage DC circuit breaker fast mechanical switch debugging device, the interface device also includes: a closing position monitoring optical fiber sensor, an effective opening position monitoring optical fiber sensor, and an opening position monitoring optical fiber sensor;

[0024] The closing position monitoring optical fiber sensor, the effective opening distance position monitoring optical fiber sensor, and the opening position monitoring optical fiber sensor respectively monitor the movement of the baffle to the effective position to obtain the closing termination time, the opening to effective opening distance termination time, and the opening termination time, and send them to the interface processor;

[0025] The interface processor sends the closing termination time, the opening to effective opening distance termination time, and the opening termination time to the switch monitoring device through the first interface and the second interface;

[0026] The switch monitoring device obtains the effective closing time, the opening to effective opening distance time, and the opening effective time according to the closing termination time, the opening to effective opening distance termination time, the opening termination time, and the start time when the controller sends the opening and closing instructions.

[0027] In order to solve the above technical problems, the present application also provides a high-voltage DC circuit breaker fast mechanical switch debugging method, which is applied to a high-voltage DC circuit breaker fast mechanical switch debugging device, comprising: a plurality of interface devices, a switch control device, a switch monitoring device, and a controller; each of the interface devices is connected to each of the fast mechanical switches; the switch control device and the switch monitoring device are connected to each of the interface devices, and the controller is connected to the switch control device and the switch monitoring device; the method comprises:

[0028] When the fast mechanical switch is powered off, an opening and closing instruction is sent to the switch control device, so that the switch control device sends an opening and closing control signal to each of the interface devices according to the opening and closing instruction, and the interface device receives the opening and closing control signal and controls the corresponding fast mechanical switch to perform the corresponding opening and closing operation;

[0029] Receiving the opening and closing state monitoring data of the fast mechanical switch acquired by the switch monitoring device through the interface device;

[0030] Determine whether each of the fast mechanical switches is normal according to the opening and closing instructions and the monitoring data.

[0031] As an optional solution, in the above-mentioned high-voltage DC circuit breaker fast mechanical switch debugging method, the interface device includes a first interface, a second interface, and an interface processor; the switch control device includes a first system and a second system; the first interface and the second interface are respectively connected to the first system and the second system of the switch control device;

[0032] The switch control device sending the opening and closing control signal to each of the interface devices according to the opening and closing instruction includes:

[0033] The first system and the second system of the switch control device simultaneously send opening and closing control signals to the first interface and the second interface of the interface device, and one of the systems acts as a main system to send opening and closing control signals carrying a duty flag, and the other system acts as a backup system to send opening and closing control signals carrying a standby flag;

[0034] Correspondingly, the interface device receives the opening and closing control signal and controls the corresponding fast mechanical switch to perform the corresponding opening and closing operation, including:

[0035] The interface processor receives the opening and closing control signals sent by the first interface and the second interface;

[0036] The interface processor parses the opening and closing control signal, and executes the opening and closing control signal corresponding to the duty flag to control the corresponding fast mechanical switch to perform corresponding opening and closing operations.

[0037] As an optional solution, in the above-mentioned high-voltage DC circuit breaker fast mechanical switch debugging method, the interface processor parses the opening and closing control signal, and executes the opening and closing control signal corresponding to the duty flag to control the corresponding fast mechanical switch to perform the corresponding opening and closing operation, including:

[0038] If both closing control signals received by the interface processor carry the duty flag, the closing control signal corresponding to the main system is selected;

[0039] If the two opening and closing control signals received by the interface processor both carry the standby flag, the latter is selected as the control signal corresponding to the standby system.

[0040] As an optional solution, in the above high-voltage DC circuit breaker fast mechanical switch debugging method, when the interface processor receives only one control signal, it also includes:

[0041] If the analysis of the opening and closing control signal shows that it carries a duty flag, the opening and closing control signal is executed;

[0042] If the analysis of the opening and closing control signal shows that it carries a standby flag, the opening and closing control signal will not be responded to, and the initial state of the fast mechanical switch will be maintained.

[0043] As an optional solution, the above-mentioned high-voltage DC circuit breaker fast mechanical switch debugging method further includes:

[0044] When two-way receiving communication failure occurs between the switch control device and the interface device, the switch control device sends out a communication alarm signal to maintain the initial state of the fast mechanical switch.

[0045] As an optional solution, in the above-mentioned high-voltage DC circuit breaker fast mechanical switch debugging method, the high-voltage DC circuit breaker fast mechanical switch debugging device also includes: a switch protection device; the switch protection device is connected to each of the interface devices, and the controller is connected to the switch protection device; the method also includes:

[0046] Sending the opening and closing instructions to the switch protection device, so that the switch protection device determines the abnormal break of each fast mechanical switch according to the opening and closing state of the fast mechanical switch and the opening and closing instructions sent by the controller, and controls the abnormal break of each fast mechanical switch to perform protection action;

[0047] Wherein, the switch protection device obtains the opening and closing status of the fast mechanical switch through the interface device.

[0048] As an optional solution, in the above-mentioned high-voltage DC circuit breaker fast mechanical switch debugging method, when the opening and closing instruction is a closing instruction, the switch protection device determines the abnormal break of each of the fast mechanical switches according to the opening and closing state of the fast mechanical switch and the opening and closing instruction sent by the controller, and controls the abnormal break of each of the fast mechanical switches to perform a protection action, including:

[0049] After receiving the closing command sent by the controller, after a preset delay time, receiving the opening position information of each of the fast mechanical switches and the voltage of the closing capacitor sent by the interface device;

[0050] Determining whether the opening position information is valid and the voltage of the closing capacitor is not reduced;

[0051] If yes, it is determined that the current closing of the fast mechanical switch fails;

[0052] Determining whether the number of the fast mechanical switches that failed to close is not greater than 1;

[0053] If it is not greater than 1, the current closing failure information is reported, and a closing control signal is sent to the interface device corresponding to the fast mechanical switch that failed to close, so as to control the corresponding fast mechanical switch to reclose;

[0054] If the fast mechanical switch recloses successfully, a high-voltage DC circuit breaker closing success signal is output, and the abnormal fast mechanical switch carries a maintenance waiting information;

[0055] If it is greater than 1 or the fast mechanical switch fails to reclose, the fast mechanical switch that fails to close is controlled to self-disconnect;

[0056] If the self-disconnection is successful, the output high-voltage DC circuit breaker is in the open state, and the abnormally fast mechanical switch is waiting for maintenance information;

[0057] If the self-disconnection fails, the opening and closing status of the output high-voltage DC circuit breaker is unknown, and the abnormal fast mechanical switch needs to be forced to open and wait for maintenance information.

[0058] As an optional solution, in the above-mentioned high-voltage DC circuit breaker fast mechanical switch debugging method, when the opening and closing instruction is an opening instruction, the switch protection device determines the abnormal break of each of the fast mechanical switches according to the opening and closing state of the fast mechanical switch and the opening and closing instruction sent by the controller, and controls the abnormal break of each of the fast mechanical switches to perform a protection action, including:

[0059] After receiving the opening command issued by the controller, after a preset delay time, the closing position information of each of the fast mechanical switches and the voltage of the opening capacitor sent by the interface device are received;

[0060] Determining whether the closing position information is valid and the voltage of the opening capacitor does not change;

[0061] If yes, it is determined that the current opening of the fast mechanical switch fails;

[0062] Determining whether the number of the fast mechanical switches that failed to open is not greater than 1;

[0063] If it is not greater than 1, the current opening failure information is reported, and the maintenance information of the fast mechanical switch that failed to open is output;

[0064] If it is greater than 1, a switch-off control signal is sent to the interface device corresponding to the fast mechanical switch that failed to open, so as to control the corresponding fast mechanical switch to open again;

[0065] If the number of the fast mechanical switches that failed to open after re-opening is greater than 1, the fast mechanical switch with abnormal output needs to be forced to open and wait for maintenance information;

[0066] If the number of the fast mechanical switches that failed to open after re-opening is less than 1, the maintenance information of the fast mechanical switches that currently failed to open is output.

[0067] The high-voltage DC circuit breaker fast mechanical switch debugging equipment provided in the present application is applied to multiple fast mechanical switches, including: multiple interface devices, switch control devices, switch monitoring devices, and controllers; each interface device is connected to each fast mechanical switch respectively; the switch control device and the switch monitoring device are connected to each interface device, and the controller is connected to the switch control device and the switch monitoring device; in the present application, when the fast mechanical switch is powered off, the switch control device receives the instruction and sends a switch-on and switch-off control signal to the interface device, the interface device receives the control signal and controls the corresponding fast mechanical switch to perform the switch-on and switch-off operation, the switch monitoring device monitors the switch-on and switch-off state of the fast mechanical switch, and sends the data to the controller, the controller determines whether each fast mechanical switch is normal according to the monitoring data, so as to facilitate the corresponding processing, and reduce the risk of system shutdown caused by a single switch failure. Through real-time monitoring and control, the maintenance efficiency is improved, the fault power outage time is reduced, the operation quality of the high-voltage DC circuit breaker fast mechanical switch is effectively improved, and the stable operation of the flexible DC power grid is guaranteed.

[0068] In addition, the present application also provides a high-voltage DC circuit breaker fast mechanical switch debugging method, which corresponds to the above-mentioned high-voltage DC circuit breaker fast mechanical switch debugging device and has the same effect as above. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] In order to more clearly illustrate the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0070] Figure 1 A schematic diagram of a high-voltage DC circuit breaker fast mechanical switch debugging device is provided for this embodiment;

[0071] Figure 2 A schematic diagram of an interface device and a switch control device provided in an embodiment of the present application;

[0072] Figure 3 A schematic diagram of an interface device provided in an embodiment of the present application;

[0073] Figure 4 A partial schematic diagram of an interface device provided in an embodiment of the present application;

[0074] Figure 5 A partial schematic diagram of another interface device provided in an embodiment of the present application;

[0075] Figure 6 A flowchart of a high-voltage DC circuit breaker fast mechanical switch debugging method provided in an embodiment of the present application;

[0076] Figure 7 A logic diagram of a fast mechanical switch closing failure protection provided in an embodiment of the present application;

[0077] Figure 8 A logic diagram of a fast mechanical switch closing failure protection provided in an embodiment of the present application;

[0078] Fig. 9 A schematic diagram of the opening and closing states of a fast mechanical switch protection action provided in an embodiment of the present application. DETAILED DESCRIPTION

[0079] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0080] The core of the present application is to provide a high-voltage DC circuit breaker fast mechanical switch debugging device and method.

[0081] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0082] A high-voltage DC circuit breaker is a circuit breaker that combines power electronic devices and is used to disconnect DC circuits. High-voltage DC circuit breakers can not only cut off and connect high-voltage lines and various no-load and load currents when the power system is operating normally, but also automatically switch various overload and short-circuit currents through the action of relay protection devices when a power system fault occurs, preventing the scope of the accident from expanding. High-voltage DC circuit breakers are the core equipment for the networking of flexible direct current transmission projects, and fast mechanical switches are the core equipment of high-voltage DC circuit breakers. They withstand load currents during normal closing operation. When a line fault occurs, the fast mechanical switch must provide sufficient insulation distance in a very short time (2~3ms), which plays a decisive role in whether the DC circuit breaker can successfully remove the fault.

[0083] Fast mechanical switches are one of the core components of high-voltage DC circuit breakers. They can establish insulation within a few milliseconds, providing a guarantee for the successful opening of DC circuit breakers. As the voltage level of the DC system increases, the main branch of the DC circuit breaker requires multiple fast mechanical switches in series. When a fault occurs, multiple fast mechanical switches need to reach an effective opening distance in a short time to withstand the operating overvoltage.

[0084] Since the DC circuit breaker is connected in series with multiple fast mechanical switches and has a high withstand operating impulse voltage, if good voltage equalization measures are not taken or a single switch fails to reach the specified position within the required time, the impulse voltage it will withstand will be higher than that of other switches, causing the switch to break down, which in turn causes other switches to break down one after another.

[0085] In order to solve the above problems and realize the performance test of the fast mechanical switch of the high-voltage DC circuit breaker, this embodiment provides a high-voltage DC circuit breaker fast mechanical switch debugging device, which is applied to multiple fast mechanical switches. Figure 1 A schematic diagram of a high-voltage DC circuit breaker fast mechanical switch debugging device is provided for this embodiment. Figure 1 As shown, including:

[0086] A plurality of interface devices 11, a switch control device 12, a switch monitoring device 13, and a controller 14;

[0087] Each interface device 11 is connected to each fast mechanical switch respectively; the switch control device 12 and the switch monitoring device 13 are connected to each interface device 11, and the controller 14 is connected to the switch control device 12 and the switch monitoring device 13;

[0088] When the fast mechanical switch is powered off, the controller 14 sends an opening and closing instruction to the switch control device 12, so that the switch control device 12 sends an opening and closing control signal to each interface device 11 according to the opening and closing instruction. The interface device 11 receives the opening and closing control signal and controls the corresponding fast mechanical switch to perform the corresponding opening and closing operation. The switch monitoring device 13 obtains the opening and closing status of the fast mechanical switch through the interface device 11 and sends the monitoring data to the controller 14 in real time. The controller 14 determines whether each fast mechanical switch is normal according to the opening and closing instruction and the monitoring data.

[0089] In this embodiment, during debugging or maintenance, the power supply of the fast mechanical switch is cut off for safety reasons.

[0090] The interface device 11 refers to a device directly connected to each fast mechanical switch. It is a bridge between the control system and the mechanical switch, responsible for transmitting control signals and monitoring data. The interface device 11 can be specifically an electrical interface or a communication interface, which is used to ensure accurate signal transmission and real-time monitoring of the switch status.

[0091] The switch control device 12 is a device responsible for sending a switch-on / off control signal to the interface device 11 according to the instruction of the controller 14, and directly controls the switch-on / off operation of the fast mechanical switch. Specifically, it executes the switch-on / off instruction of the controller 14 and controls the fast mechanical switch through the interface device 11.

[0092] The switch monitoring device 13 refers to a device that obtains the opening and closing status of the fast mechanical switch through the interface device 11 and sends the monitoring data to the controller 14 in real time. Specifically, it monitors and records the operating status of the fast mechanical switch, such as the opening and closing capacitance, time, etc., and provides it to the controller 14 for analysis.

[0093] The controller 14 sends the opening and closing instructions to the switch control device 12, and is a central processing unit that determines whether the fast mechanical switch is normal based on the monitoring data. Specifically, it is the core of the control system, responsible for coordinating the entire debugging process, issuing instructions and analyzing monitoring data. It can be a microprocessor or computer system for logical judgment and decision making. The opening and closing instructions refer to the instructions generated by the controller 14 according to the system status or operation requirements, which are used to guide the switch control device 12 to perform corresponding operations. Specifically, it is a control signal that guides the fast mechanical switch to open or close.

[0094] The opening and closing state refers to the physical state of the fast mechanical switch after the opening and closing operation, reflecting whether the switch is in an open or closed state. Specifically, it refers to whether the switch successfully performs the opening or closing operation, including the opening and closing degree, position, opening and closing time of the switch, etc. The monitoring data refers to the data collected by the switch monitoring device 13 on the operating state of the fast mechanical switch, such as the opening and closing time, the capacitance value, etc.

[0095] This embodiment realizes accurate transmission of instructions and real-time feedback of status through the connection between the interface device 11 and the fast mechanical switch; realizes precise control of switch operation through the connection between the switch control device 12 and the interface device 11; realizes real-time monitoring of the switch status through the connection between the switch monitoring device 13 and the interface device 11; realizes logical judgment and decision-making of the entire system through the connection between the controller 14 and the switch control device 12 and the switch monitoring device 13.

[0096] The high-voltage DC circuit breaker fast mechanical switch debugging device provided by the embodiment of the present application is applied to multiple fast mechanical switches, including: multiple interface devices 11, switch control devices 12, switch monitoring devices 13, and controllers 14; each interface device 11 is connected to each fast mechanical switch respectively; the switch control device 12 and the switch monitoring device 13 are connected to each interface device 11, and the controller 14 is connected to the switch control device 12 and the switch monitoring device 13; when the fast mechanical switch is powered off, the controller 14 sends a switch-on and switch-off instruction to the switch control device 12, so that the switch control device 12 sends a switch-on and switch-off control signal to each interface device 11 according to the switch-on and switch-off instruction, and the interface device 11 receives the switch-on and switch-off control signal and controls the corresponding fast mechanical switch to perform the corresponding switch-on and switch-off operation; the switch monitoring device 13 obtains the switch-on and switch-off state of the fast mechanical switch through the interface device 11 and sends the monitoring data to the controller 14 in real time, and the controller 14 determines whether each fast mechanical switch is normal according to the switch-on and switch-off instruction and the monitoring data. The controller 14 sends instructions when the fast mechanical switch needs to perform a switch-on and switch-off operation. After receiving the instruction, the switch control device 12 sends an opening and closing control signal to the interface device 11. The interface device 11 receives the control signal and controls the corresponding fast mechanical switch to perform the opening and closing operation. The switch monitoring device 13 monitors the opening and closing status of the fast mechanical switch and sends the data to the controller 14. The controller 14 determines whether the fast mechanical switch is normal based on the monitoring data and performs corresponding processing. The operating reliability of the high-voltage DC circuit breaker is improved, and the risk of system shutdown caused by a single switch failure is reduced. Through real-time monitoring and control, the maintenance efficiency is improved and the fault power outage time is reduced. The built-in control, monitoring, protection and interface system effectively improves the operating quality of the fast mechanical switch of the high-voltage DC circuit breaker, and provides a guarantee for the stable operation of the flexible DC power grid.

[0097] Furthermore, the embodiment of the present application provides a specific high-voltage DC circuit breaker fast mechanical switch debugging device, which also includes: a switch protection device 15;

[0098] The switch protection device 15 is connected to each interface device 11, and the controller 14 is connected to the switch protection device 15;

[0099] The switch protection device 15 obtains the opening and closing status of the fast mechanical switch through the interface device 11. The switch protection device 15 determines the abnormal break of each fast mechanical switch according to the opening and closing status of the fast mechanical switch and the opening and closing instructions sent by the controller 14, and controls the abnormal break of each fast mechanical switch to perform protection action.

[0100] In the high-voltage DC circuit breaker fast mechanical switch debugging device provided in this embodiment, the controller 14 issues the opening and closing instructions and processes the monitoring data. Multiple interface devices 11 are connected to each fast mechanical switch and are responsible for signal transmission and control. The switch control device 12 is responsible for sending the opening and closing control signal to the interface device 11. The switch monitoring device 13 monitors the state of the fast mechanical switch and feeds back the data to the controller 14. The switch protection device 15 is connected to the interface device 11 and the controller 14, and is responsible for monitoring and protecting the fast mechanical switch.

[0101] The switch protection device 15 obtains the opening and closing status of the fast mechanical switch through the interface device 11, including whether the switch is successfully closed or opened. According to the opening and closing status of the fast mechanical switch and the opening and closing instructions sent by the controller 14, it is judged whether there is an abnormal break. If an abnormality is found, the switch protection device 15 will record the relevant information and trigger a protection action. The protection action means that after detecting an abnormal break, the switch protection device 15 will control the corresponding fast mechanical switch to perform a protection action, such as forced opening or closing, to prevent the fault from expanding.

[0102] The switch protection device 15 is connected to the interface device 11 to obtain the status information of the switch in real time. The controller 14 is connected to the switch protection device 15 to issue instructions and receive feedback of protection actions to ensure the coordinated operation of the system.

[0103] The controller 14 sends the opening and closing instructions to the switch control device 12, the switch control device 12 sends the opening and closing control signal to the interface device 11, the interface device 11 controls the corresponding fast mechanical switch to perform the opening and closing operation, the switch monitoring device 13 monitors the state of the fast mechanical switch in real time, and feeds the data back to the controller 14, and the switch protection device 15 determines whether the state of the fast mechanical switch is normal according to the monitoring data and the instructions of the controller 14. If an abnormality is found, the switch protection device 15 immediately controls the fast mechanical switch to perform a protection action to ensure system safety.

[0104] Through real-time monitoring and abnormal processing of the switch protection device 15, it is ensured that the fast mechanical switch can quickly take protective measures in the event of a fault, thereby reducing the risk of equipment damage. Through real-time monitoring and abnormal alarm, maintenance personnel can quickly locate the problem, reduce the fault power outage time, and improve maintenance efficiency.

[0105] The high-voltage DC circuit breaker fast mechanical switch debugging equipment provided in this embodiment not only has basic control and monitoring functions, but also enhances the safety and reliability of the system through the switch protection device 15, thereby providing a guarantee for the stable operation of the high-voltage DC power transmission system.

[0106] According to the above embodiment, in order to improve the reliability and fault tolerance of the high-voltage DC circuit breaker fast mechanical switch debugging device, this embodiment provides a specific implementation scheme, the interface device 11 includes a first interface, a second interface, and an interface processor; the switch control device 12 includes a first system and a second system;

[0107] The first interface and the second interface are connected to the first system and the second system of the switch control device 12 respectively;

[0108] The first system and the second system simultaneously send opening and closing control signals to the first interface and the second interface of the interface device 11, and one of the systems acts as the main system to send opening and closing control signals carrying a duty flag, and the other system acts as the backup system to send opening and closing control signals carrying a standby flag; the interface processor receives the opening and closing control signals sent by the first interface and the second interface, parses the opening and closing control signals and executes the opening and closing control signals corresponding to the duty flag.

[0109] Figure 2 A schematic diagram of an interface device 11 and a switch control device 12 provided in an embodiment of the present application is shown in FIG. Figure 2 As shown, this embodiment introduces a dual-interface and dual-system redundant design to ensure that when a primary system fails, the backup system can take over seamlessly, thereby ensuring the normal operation of the fast mechanical switch.

[0110] The interface device 11 includes a first interface and a second interface, which are connected to the first system and the second system of the switch control device 12 respectively. This design provides two independent communication paths, enhances the fault tolerance of the system, and avoids the paralysis of the entire system due to a single point failure. When the main system fails, it switches to the backup system, and the backup system switches to the main system, reducing delays or errors caused by system failures, thereby improving the stability and security of the system. The system design allows automatic switching to the backup system when the main system fails without manual intervention, ensuring that the system works as expected under any circumstances.

[0111] The first system and the second system simultaneously send opening and closing control signals to the first interface and the second interface of the interface device 11. The control signal sent by the main system carries the duty flag, and the control signal sent by the backup system carries the standby flag. When the first system is used as the main system and the second system is used as the backup system, the interface processor can receive and parse the control signals from the two interfaces, and execute the correct signals according to the flags, ensuring that the system works as expected under any circumstances. The interface processor can receive and parse the control signals from the two interfaces, and execute the correct signals according to the flags, ensuring that the processing of the control signals is not affected when the system switches between the main system and the backup system.

[0112] The use of the duty flag and the standby flag allows the system to clearly distinguish between the main and standby control signals. The interface processor receives the opening and closing control signals from the first interface and the second interface. It analyzes these signals, identifies the signals with the duty flag, and performs the corresponding opening and closing operations.

[0113] The dual system and dual interface design improves system redundancy and ensures stable system operation. Seamless switching between the primary and backup systems reduces the risk of rapid mechanical switch control interruption caused by system switching.

[0114] According to the above embodiment, in order to achieve accurate and reliable control of the fast mechanical switch of the high-voltage DC circuit breaker, this embodiment provides a specific implementation scheme, and the interface device 11 also includes: a charging power supply and a trigger discharge circuit; the charging power supply supplies power to the first interface and the second interface; the charging power supply charges the opening capacitor or the closing capacitor in the trigger discharge circuit;

[0115] The interface processor generates a trigger electrical signal according to the opening and closing control signal corresponding to the duty flag and sends it to the trigger discharge circuit to turn on the corresponding thyristor of the trigger discharge circuit, so that the opening capacitor or the closing capacitor discharges the repulsion mechanism coil, and drives the fast mechanical switch to perform the corresponding opening or closing operation.

[0116] Figure 3 A schematic diagram of an interface device 11 provided in an embodiment of the present application is shown as follows: Figure 3 As shown, the interface device 11 refers to an intermediate device connecting the fast mechanical switch and the control system, specifically a device integrating multiple functions, responsible for transmitting control signals and power supply. The charging power supply refers to a device that provides power to the interface device 11, which can be specifically a power supply unit, which is used to supply power to the first interface, the second interface and the trigger discharge circuit, and to charge the opening capacitor or the closing capacitor in the trigger discharge circuit.

[0117] The trigger discharge circuit is a circuit including an opening capacitor or a closing capacitor, which is responsible for releasing energy when receiving a trigger signal and driving a fast mechanical switch to perform an opening or closing operation. The opening capacitor or the closing capacitor refers to a capacitor that stores energy in the trigger discharge circuit. The energy released by the opening capacitor or the closing capacitor can generate a current of thousands of amperes on the opening and closing coils. Specifically, the interface device 11 also includes an opening coil and a closing coil. When the opening capacitor or the closing capacitor releases energy, the opening coil and the closing coil generate a strong electromagnetic repulsion on the repulsion disk, driving the contact opening and closing operations.

[0118] Generating a trigger electrical signal and sending it to a trigger discharge circuit means that the interface processor generates a corresponding electrical signal according to the received control signal to drive the corresponding thyristor to conduct. The conduction of the thyristor causes the thyristor to become a low impedance state after receiving the trigger electrical signal, allowing current to flow, causing the capacitor to discharge the repulsion mechanism coil, and driving the fast mechanical switch to perform opening or closing.

[0119] like Figure 3 As shown, there are at least two trigger discharge circuits, at least one of which is used for releasing energy from the closing capacitor when receiving a closing signal, so that the closing coil generates a strong electromagnetic repulsion force on the repulsion disk, thereby driving the contact closing operation. At least one of which is used for releasing energy from the opening capacitor when receiving an opening signal, so that the opening coil generates a strong electromagnetic repulsion force on the repulsion disk, thereby driving the contact opening operation.

[0120] In the specific process, the charging power supply supplies power to the first interface, the second interface and the trigger discharge circuit. The interface processor receives the opening and closing control signal from the first system or the second system. The interface processor parses the duty flag in the signal and generates a corresponding trigger electrical signal. The trigger electrical signal is sent to the trigger discharge circuit, causing the thyristor to turn on, controlling the corresponding opening capacitor or closing capacitor to discharge the repulsion mechanism coil, and driving the fast mechanical switch to perform opening or closing operations.

[0121] According to the above embodiment, in order to enhance the real-time monitoring and protection capability of the fast mechanical switch state and ensure the accuracy of the switch operation and the safety of the system, this embodiment provides a specific implementation scheme, wherein the interface device 11 further includes: two position sensors;

[0122] The two position sensors respectively obtain the opening position and closing position of the fast mechanical switch; the interface processor receives the opening position and closing position and sends them to the switch monitoring device 13 and the switch protection device 15 through the first interface and the second interface.

[0123] In this embodiment, by setting two position sensors, the opening position and the closing position of the fast mechanical switch can be respectively obtained. This can be specifically two independent sensors that monitor the two states of the switch respectively.

[0124] The interface processor receives the opening and closing position information from the position sensor, and the position information is sent to the switch monitoring device 13 and the switch protection device 15 through the first interface and the second interface, which allows the system to accurately understand the current state of the switch and perform corresponding monitoring and protection measures based on this information.

[0125] By monitoring the position status of fast mechanical switches in real time, the system can promptly detect and respond to abnormal situations, such as switches that are not fully open or closed, thereby avoiding potential failures and accidents. Accurate switch position information helps maintenance personnel perform fault diagnosis and system maintenance, reducing the time and cost of troubleshooting. The integration of position sensors enables the system to automatically monitor and record switch status, improving the level of automation and reducing the need for manual intervention.

[0126] The position sensor monitors the opening and closing positions of the fast mechanical switch, and the interface processor receives the position information. The interface processor sends the position information to the switch monitoring device 13 and the switch protection device 15 through the first interface and the second interface. The switch monitoring device 13 performs status monitoring and data recording according to the position information. The switch protection device 15 performs protection actions according to the position information, such as triggering a protection mechanism when an abnormal position is detected.

[0127] Real-time status monitoring and feedback allow the system to respond to abnormal situations in a timely manner to avoid failures and accidents. Accurate switch position information helps to quickly locate and solve problems and improve maintenance efficiency. Automatic monitoring and recording of switch status reduces manual intervention and improves the automation level of the system.

[0128] According to the above embodiment, in order to strengthen the monitoring of the capacitance state involved in the opening and closing operations of the fast mechanical switch and ensure the reliability and safety of the switch operation. , this embodiment provides a specific implementation scheme, Figure 4 A partial schematic diagram of an interface device 11 provided in an embodiment of the present application is shown as follows: Figure 4 As shown, the interface device 11 also includes: a switch-off capacitor capacitance detection module and a switch-on capacitor capacitance detection module;

[0129] The opening capacitor capacitance detection module detects the opening capacitor and sends the opening capacitor capacitance value to the interface processor, and the closing capacitor capacitance detection module detects the closing capacitor capacitance value and sends the closing capacitor capacitance value to the interface processor;

[0130] The interface processor sends the opening capacitor value and the closing capacitor value to the switch monitoring device 13 and the switch protection device 15 through the first interface and the second interface.

[0131] By setting up an opening capacitor capacitance detection module and a closing capacitor capacitance detection module, the system can detect the capacitance of the opening capacitor and the closing capacitor respectively. The detection module sends the capacitance value to the interface processor, and the interface processor sends the opening capacitor capacitance value and the closing capacitor capacitance value to the switch monitoring device 13 and the switch protection device 15 through the first interface and the second interface.

[0132] Monitoring the capacitance value is to ensure that the capacitor can be charged and discharged correctly during the opening and closing operations, which is a key factor in whether the switch can successfully perform operations. By ensuring that the capacitance value is within the normal range, the system can avoid operation failure or equipment damage caused by capacitance problems.

[0133] The switch monitoring device 13 and the switch protection device 15 can quickly determine the effectiveness of the opening and closing operations according to the change in the capacitance value, and trigger a protection mechanism, such as emergency opening or closing, when necessary to protect the system from damage.

[0134] Automatically monitoring capacitor values ​​reduces the need for manual intervention and improves the automation level of the system. At the same time, by intelligently analyzing capacitor data, the system can predict and prevent potential failures. Accurate capacitor value records help improve the transparency of system operations, allowing maintenance personnel to trace operation history, analyze operation trends, and formulate maintenance strategies accordingly.

[0135] The opening capacitor capacitance detection module and the closing capacitor capacitance detection module monitor the capacitance of the opening capacitor and the closing capacitor respectively. The detection module sends the capacitance information to the interface processor. The interface processor sends the capacitance information to the switch monitoring device 13 and the switch protection device 15 through the first interface and the second interface. The switch monitoring device 13 performs status monitoring and data recording according to the capacitance, and the switch protection device 15 performs protection actions according to the capacitance, such as triggering a protection mechanism when an abnormal capacitance is detected.

[0136] According to the above embodiment, in order to accurately measure and monitor the motion characteristics of the fast mechanical switch in the opening and closing operation, this embodiment provides a specific implementation scheme, the interface device 11 also includes: a closing position monitoring optical fiber sensor, an effective opening distance position monitoring optical fiber sensor, and an opening position monitoring optical fiber sensor;

[0137] The closing position monitoring optical fiber sensor, the effective opening distance position monitoring optical fiber sensor, and the opening position monitoring optical fiber sensor respectively monitor the movement of the baffle to the effective position to obtain the closing end time, the opening to effective opening distance end time, and the opening end time, and send them to the interface processor;

[0138] The interface processor sends the closing termination time, the opening to effective opening distance termination time, and the opening termination time to the switch monitoring device 13 through the first interface and the second interface;

[0139] The switch monitoring device 13 obtains the effective closing time, the opening to effective opening distance time, and the opening effective time according to the closing termination time, the opening to effective opening distance termination time, the opening termination time, and the start time when the controller 14 issues the opening and closing instructions.

[0140] Figure 5 A partial schematic diagram of another interface device 11 provided in an embodiment of the present application, such as Figure 5 As shown, by setting the closing position monitoring optical fiber sensor, the effective opening distance position monitoring optical fiber sensor and the opening position monitoring optical fiber sensor, the system can accurately measure the time from the switch receiving the command to the completion of closing, reaching the effective opening distance and completing the opening. These sensors can be specifically high-precision optical fiber sensors for monitoring the movement of the switch baffle.

[0141] The time data monitored by the sensor is sent to the interface processor, and the interface processor sends the measured time data to the switch monitoring device 13 through the first interface and the second interface, which allows the system to accurately understand the time characteristics of the switch operation and perform corresponding monitoring and evaluation based on this information.

[0142] By monitoring the time parameters of switch operations in real time, the system can promptly detect and respond to operation delays or abnormal conditions, thereby avoiding potential failures and accidents. Accurate operation time data helps maintenance personnel perform fault diagnosis and system maintenance, reducing the time and cost of troubleshooting.

[0143] The closing position monitoring optical fiber sensor, the effective opening distance position monitoring optical fiber sensor, and the opening position monitoring optical fiber sensor respectively monitor the time when the baffle moves to the effective position. The sensor sends the measured closing termination time, opening to effective opening distance termination time, and opening termination time to the interface processor. The interface processor sends these time data to the switch monitoring device 13 through the first interface and the second interface. The switch monitoring device 13 calculates the effective closing time, the opening to effective opening distance time, and the opening effective time based on these time data and the start time when the controller 14 sends the opening and closing instructions.

[0144] The present application provides a corresponding embodiment for a debugging method, a high-voltage DC circuit breaker fast mechanical switch debugging method, applied to a high-voltage DC circuit breaker fast mechanical switch debugging device, comprising: a plurality of interface devices 11, a switch control device 12, a switch monitoring device 13, and a controller 14; each interface device 11 is connected to each fast mechanical switch respectively; the switch control device 12 and the switch monitoring device 13 are connected to each interface device 11, and the controller 14 is connected to the switch control device 12 and the switch monitoring device 13; Figure 6 A flowchart of a high-voltage DC circuit breaker fast mechanical switch debugging method provided in an embodiment of the present application is shown in FIG. Figure 6As shown, the method includes:

[0145] S11: When the fast mechanical switch is powered off, an opening and closing instruction is sent to the switch control device 12, so that the switch control device 12 sends an opening and closing control signal to each interface device 11 according to the opening and closing instruction, and the interface device 11 receives the opening and closing control signal and controls the corresponding fast mechanical switch to perform the corresponding opening and closing operation;

[0146] S12: receiving the opening and closing state monitoring data of the fast mechanical switch acquired by the switch monitoring device 13 through the interface device 11;

[0147] S13: Determine whether each fast mechanical switch is normal based on the opening and closing instructions and monitoring data.

[0148] The controller 14 issues an opening and closing instruction to instruct the switch to perform an opening or closing operation. The switch control device 12 is responsible for converting the instructions of the controller 14 into control signals that can be understood by the interface device 11. In step S11, the controller 14 sends opening and closing instructions to the switch control device 12, and then the switch control device 12 converts these instructions into corresponding control signals and sends them to the interface device 11. The interface device 11 receives the opening and closing control signals and controls the corresponding fast mechanical switch to perform the corresponding opening and closing operations.

[0149] The switch opening and closing state monitoring data in step S12 refers to the actual state information of the switch after the switch opening and closing operation is performed, which may specifically be parameters such as switch position and time. In this step, the monitoring data transmitted from the switch monitoring device 13 is received by the interface device 11 .

[0150] In order to evaluate the correctness and effectiveness of the switch operation, the opening and closing instructions and monitoring data in step S13 refer to the instructions issued by the controller 14 and the data received from the monitoring device. The controller 14 analyzes the opening and closing instructions and monitoring data to determine whether the fast mechanical switch is working normally.

[0151] In the embodiment of the present application, when the fast mechanical switch is powered off, the controller 14 sends a switch opening and closing instruction to the switch control device 12 according to a predetermined program or operator instruction. After receiving the instruction, the switch control device 12 sends a corresponding control signal to the interface device 11. The interface device 11 controls the fast mechanical switch to perform the switch opening and closing operation. The switch monitoring device 13 monitors the switch opening and closing state and sends the data to the interface device 11. The controller 14 receives the monitoring data and compares it with the issued instruction to determine whether the switch is working normally. By accurately controlling and monitoring the switch opening and closing operation, the accuracy and reliability of the operation are improved. Accurate monitoring data helps to quickly locate and solve problems, improve maintenance efficiency, effectively improve the operating quality of the fast mechanical switch of the high-voltage DC circuit breaker, and provide a guarantee for the stable operation of the flexible DC power grid.

[0152] According to the above embodiment, in order to enhance the reliability and flexibility of the high-voltage DC circuit breaker fast mechanical switch debugging method, this embodiment provides a specific implementation scheme, the interface device 11 includes a first interface, a second interface, and an interface processor; the switch control device 12 includes a first system and a second system; the first interface and the second interface are respectively connected to the first system and the second system of the switch control device 12;

[0153] The switch control device 12 sends the opening and closing control signal to each interface device 11 according to the opening and closing instruction, including:

[0154] The first system and the second system of the switch control device 12 simultaneously send opening and closing control signals to the first interface and the second interface of the interface device 11, and one of the systems acts as the main system to send opening and closing control signals carrying the duty flag, and the other system acts as the backup system to send opening and closing control signals carrying the standby flag;

[0155] Correspondingly, the interface device 11 receives the opening and closing control signal and controls the corresponding fast mechanical switch to perform the corresponding opening and closing operation, including:

[0156] The interface processor receives the opening and closing control signals sent by the first interface and the second interface;

[0157] The interface processor analyzes the opening and closing control signal, and executes the opening and closing control signal corresponding to the duty flag position to control the corresponding fast mechanical switch to perform the corresponding opening and closing operation.

[0158] In this embodiment, by setting up dual interfaces and dual control systems, the system can seamlessly switch to another system when a system fails, thereby ensuring the normal operation of the fast mechanical switch.

[0159] By setting the first interface and the second interface, and the corresponding first system and the second system, the system is designed with dual paths to ensure that when one path or system fails, the other can immediately take over to ensure continuous operation of the system.

[0160] The use of duty flags and standby flags allows the system to clearly distinguish between the main and standby control signals, so that it can quickly switch to the standby system when the main system fails, reducing delays or errors caused by system switching. When the main system fails, it automatically switches to the standby system without manual intervention, ensuring that the system can work as expected in any situation.

[0161] The design of the interface processor allows the system to centrally process the opening and closing control signals, reducing the possibility of errors and improving the efficiency of signal processing. Even in complex working environments or unexpected situations, the dual system design ensures that at least one system can work properly, thereby improving the availability and reliability of the entire commissioning equipment.

[0162] Specifically, the first system and the second system of the switch control device 12 simultaneously send opening and closing control signals to the first interface and the second interface of the interface device 11. One of the systems serves as the main system and carries the duty flag; the other serves as the backup system and carries the standby flag. The interface processor receives the opening and closing control signals from the first interface and the second interface. The interface processor parses the opening and closing control signals, and preferentially executes the signals carrying the duty flag, and controls the corresponding fast mechanical switches to perform corresponding opening and closing operations. The system can not only operate stably under normal conditions, but also recover quickly when a fault occurs, thereby ensuring that the debugging process of the fast mechanical switch of the high-voltage DC circuit breaker is efficient and safe.

[0163] According to the above embodiment, in order to ensure that in the dual system redundant configuration, the interface processor can consistently and unambiguously determine which control signal should be executed, this embodiment provides a specific implementation scheme, the interface processor parses the opening and closing control signal, and executes the opening and closing control signal corresponding to the duty flag to control the corresponding fast mechanical switch to perform the corresponding opening and closing operation, including:

[0164] If the two closing control signals received by the interface processor both carry the duty flag, the closing control signal corresponding to the main system is selected;

[0165] If the two opening and closing control signals received by the interface processor both carry the standby flag bit, the latter is selected as the control signal corresponding to the standby system.

[0166] The purpose of this embodiment is to ensure that in a dual system redundant configuration, the interface processor can consistently and unambiguously determine which control signal should be executed, whether in normal operation or system switching. This design ensures the determinism and reliability of the opening and closing operations of the fast mechanical switch, avoiding possible conflicts and confusion.

[0167] When the interface processor receives two closing control signals that both carry the duty flag, the signal of the main system that arrives later is selected as the execution basis. This ensures that when two systems try to control the switch at the same time, there is a clear priority rule to determine which signal should be executed. When two closing control signals both carry the duty flag, it may be because the previous main system fails and needs to switch to the backup system but fails to switch successfully. The backup system successfully switches to the main system, so the control signal sent by the main system later is more reliable.

[0168] When the interface processor receives two opening and closing control signals that both carry the standby flag, the backup system signal that arrives later is selected as the execution basis. This allows the system to seamlessly switch to the backup system when the main system fails without causing operational confusion. When two closing control signals both carry the duty flag, it may be because the previous main system failed and successfully switched to the backup system, but because the backup system failed to successfully switch to the main system, the control signal sent to the backup system later is more reliable.

[0169] By ensuring that the interface processor always executes the highest priority signal, the system's safety and stability are improved and the risk of failure due to signal processing errors is reduced.

[0170] According to the above embodiment, in order to ensure that the interface processor can correctly respond to and control the fast mechanical switch when only one control signal is available, and avoid erroneous operation caused by incomplete signals or system switching, this embodiment provides a specific implementation scheme, when the interface processor only receives one control signal, it also includes:

[0171] If the analyzed opening and closing control signal carries the duty flag, the opening and closing control signal is executed;

[0172] If the analyzed opening and closing control signal carries the standby flag, the opening and closing control signal will not be responded to, and the initial state of the fast mechanical switch will be maintained.

[0173] When the system receives only one control signal, it determines whether to execute the signal by checking whether the signal carries the duty flag, thereby ensuring the safety of operation. If the signal carries the duty flag, it is considered that the signal comes from the currently responsible system and can be executed safely. If the received signal carries the standby flag, the interface processor does not execute the signal and keeps the fast mechanical switch in the initial state. This avoids possible misoperation when the system is switched or the signal is unstable.

[0174] By only performing operations when the signal carries the duty flag, the system can clearly distinguish between the active and standby systems, thereby maintaining stability when problems occur in the primary system until the standby system successfully takes over.

[0175] Through this implementation scheme, the system can make a correct response in a single signal situation, ensuring the safety of operation and the stability of the system, while avoiding possible misoperation and improving the reliability and safety of the entire high-voltage DC circuit breaker fast mechanical switch commissioning equipment.

[0176] According to the above embodiment, in order to ensure that when a communication failure occurs between the switch control device 12 and the interface device 11, a warning can be issued in time and to prevent the fast mechanical switch from operating in an uncontrolled state, this embodiment provides a specific implementation scheme, which also includes:

[0177] When two-way receiving communication failure occurs between the switch control device 12 and the interface device 11, the switch control device 12 sends a communication alarm signal to maintain the initial state of the fast mechanical switch.

[0178] When both receiving communications are detected to be faulty, the switch control device 12 sends a communication alarm signal, which can be specifically an audible and visual alarm, a system log record, or an error code sent to the monitoring system so that maintenance personnel can quickly detect and respond. Maintaining the initial state of the fast mechanical switch avoids malfunctions or unauthorized operations caused by communication problems, ensuring the safety of the system before the problem is resolved.

[0179] By maintaining the initial state of the switch in the event of a communication failure, the system can prevent unstable or dangerous situations caused by signal transmission errors, enhancing the stability and safety of the system. After receiving the alarm signal, maintenance personnel can conduct inspections and repairs to restore communication and ensure that the system returns to normal operation. This improves the robustness of the entire high-voltage DC circuit breaker fast mechanical switch commissioning equipment in the face of communication problems.

[0180] According to the above embodiment, this embodiment provides a specific implementation scheme, the high-voltage DC circuit breaker fast mechanical switch debugging device also includes: a switch protection device 15; the switch protection device 15 is connected to each interface device 11, and the controller 14 is connected to the switch protection device 15; the method also includes:

[0181] Send the opening and closing instructions to the switch protection device 15, so that the switch protection device 15 determines the abnormal break of each fast mechanical switch according to the opening and closing state of the fast mechanical switch and the opening and closing instructions sent by the controller 14, and controls the abnormal break of each fast mechanical switch to perform protection action;

[0182] The switch protection device 15 obtains the opening and closing status of the fast mechanical switch through the interface device 11.

[0183] In order to enhance the safety and reliability of the high-voltage DC circuit breaker fast mechanical switch debugging equipment, especially when detecting and processing abnormal breaks of fast mechanical switches, this embodiment integrates the switch protection device 15, so that the system can more effectively monitor the switch status, identify and respond to abnormal situations in a timely manner, and perform necessary protection actions to prevent the spread of faults or damage to equipment.

[0184] The switch protection device 15 can monitor the opening and closing status of the fast mechanical switch in real time, detect abnormal breaks in time, and perform protective actions, such as emergency opening or closing, to prevent the fault from expanding. By sending opening and closing instructions to the switch protection device 15, the system can take prompt action when abnormal breaks are detected to reduce the impact on the main system. Accurate fault detection and timely protective actions help reduce fault recovery time and improve system availability and maintenance efficiency.

[0185] The controller 14 generates an opening and closing instruction and sends it to the switch protection device 15. The switch protection device 15 obtains the opening and closing status of the fast mechanical switch through the interface device 11. The switch protection device 15 analyzes the opening and closing instructions received from the controller 14 and the switch status obtained from the interface device 11 to determine whether there is an abnormal break. If an abnormal break is detected, the switch protection device 15 controls the abnormal break of the fast mechanical switch to perform a protection action, such as emergency opening or closing. The protection action is performed to isolate the faulty part and protect the rest of the system from damage.

[0186] According to the above embodiment, in order to improve the safety and reliability of the high-voltage DC circuit breaker when performing the closing operation, especially in detecting and processing the closing failure. This embodiment provides a specific implementation scheme, when the opening and closing instruction is a closing instruction, the switch protection device 15 determines the abnormal break of each fast mechanical switch according to the opening and closing state of the fast mechanical switch and the opening and closing instruction sent by the controller 14, and controls the abnormal break of each fast mechanical switch to perform a protection action, including:

[0187] After receiving the closing command issued by the controller 14, after a preset delay, the opening position information of each fast mechanical switch and the voltage of the closing capacitor sent by the receiving interface device 11 are received;

[0188] Determine whether the opening position information is valid and the voltage of the closing capacitor has not decreased;

[0189] If so, it is determined that the current fast mechanical switch closing has failed;

[0190] Determine whether the number of fast mechanical switches that fail to close is not greater than 1;

[0191] If it is not greater than 1, the current closing failure information is reported, and a closing control signal is sent to the interface device 11 corresponding to the fast mechanical switch that failed to close, so as to control the corresponding fast mechanical switch to reclose;

[0192] If the fast mechanical switch recloses successfully, the high-voltage DC circuit breaker closing success signal is output, and the abnormal fast mechanical switch carries the information of waiting for maintenance;

[0193] If it is greater than 1 or the fast mechanical switch fails to reclose, the fast mechanical switch that failed to close will be controlled to disconnect automatically;

[0194] If the self-disconnection is successful, the output high-voltage DC circuit breaker is in the open state, and the abnormally fast mechanical switch is waiting for maintenance information;

[0195] If the self-disconnection fails, the opening and closing status of the output high-voltage DC circuit breaker is unknown, and the abnormal fast mechanical switch needs to be forced to open and wait for maintenance information.

[0196] After receiving the closing command, the switch protection device 15 of this embodiment obtains the opening position information of the fast mechanical switch and the voltage of the closing capacitor through the interface device 11, and automatically detects whether the closing operation is successful. If the closing failure is detected (that is, the opening position information is valid and the closing capacitor voltage has not decreased), the switch protection device 15 can respond in time and perform protection actions, such as reclosing or self-disconnection, to ensure the safety of the system. The opening position information is valid means that it is determined according to the opening position information that the fast mechanical switch is still in the opening state.

[0197] By determining the number of fast mechanical switches that fail to close, the system can decide whether to perform more aggressive protection actions (such as self-disconnection when multiple switches fail to close), thereby reducing the impact of the fault on the entire system.

[0198] Figure 7 A logic diagram of a fast mechanical switch closing failure protection provided in an embodiment of the present application is shown in FIG. Figure 7 As shown, the switch protection device 15 receives the closing command issued by the controller 14. After a preset delay time, for example, 20ms, the opening position information of each fast mechanical switch and the voltage of the closing capacitor sent by the interface device 11 are received, and it is determined whether the opening position information is valid and the voltage of the closing capacitor has not decreased. If the conditions are met, it is determined that the current fast mechanical switch has failed to close, and it is determined whether the number of fast mechanical switches that failed to close is not greater than 1. If it is not greater than 1, it reports which fast mechanical switch has failed to close, and sends a closing control signal to the interface device 11 corresponding to the fast mechanical switch that failed to close, and controls the corresponding fast mechanical switch to reclose. If the reclosing is successful, the high-voltage DC circuit breaker closing success signal is output, and the abnormal fast mechanical switch is marked for maintenance.

[0199] If the number of fast mechanical switches that failed to close is greater than 1 or the reclosing fails, the fast mechanical switches that failed to close are controlled to self-disconnect. If the self-disconnection succeeds, the high-voltage DC circuit breaker is in the open state signal, and the abnormal fast mechanical switch is marked for maintenance. If the self-disconnection fails, the high-voltage DC circuit breaker open and close state unknown signal is output, and the abnormal fast mechanical switch is marked to be forced to open and wait for maintenance.

[0200] According to the above embodiment, this embodiment provides a specific implementation scheme. When the opening and closing instruction is an opening instruction, the switch protection device 15 determines the abnormal break of each fast mechanical switch according to the opening and closing state of the fast mechanical switch and the opening and closing instruction sent by the controller 14, and controls the abnormal break of each fast mechanical switch to perform a protection action, including:

[0201] After receiving the opening command issued by the controller 14, after a preset delay, the closing position information of each fast mechanical switch and the voltage of the opening capacitor sent by the receiving interface device 11 are received;

[0202] Determine whether the closing position information is valid and the voltage of the opening capacitor has not changed;

[0203] If so, it is determined that the current rapid mechanical switch has failed to open;

[0204] Determine whether the number of fast mechanical switches that fail to open is not greater than 1;

[0205] If it is not greater than 1, the current opening failure information is reported, and the fast mechanical switch that failed to open the current circuit breaker is output to be repaired;

[0206] If it is greater than 1, a trip control signal is sent to the interface device 11 corresponding to the fast mechanical switch that failed to open, so as to control the corresponding fast mechanical switch to open again;

[0207] If the number of fast mechanical switches that failed to open after re-opening is greater than 1, the fast mechanical switch with abnormal output needs to be forced to open and wait for maintenance information;

[0208] If the number of fast mechanical switches that failed to open after re-opening is less than 1, the information that the fast mechanical switches that failed to open are to be repaired is output.

[0209] In order to ensure that the abnormal situation of the fast mechanical switch, especially the situation of the opening failure, can be accurately identified and handled when the opening instruction is executed, this embodiment integrates the intelligent detection and response mechanism in the switch protection device 15, so that the system can automatically judge the result of the opening operation and perform appropriate protection actions when an abnormality is detected, so as to ensure the safe operation of the high-voltage DC circuit breaker and the integrity of the equipment.

[0210] In this embodiment, by implementing a preset time delay and status check in the switch protection device 15, the system can verify the success of the operation after the opening operation and detect the opening failure in time.

[0211] After receiving the opening command, the system obtains the closing position information of the fast mechanical switch and the voltage of the opening capacitor through the interface device 11 to automatically detect whether the opening operation is successful. If the closing position information is still valid and the opening capacitor voltage has not decreased after the preset time, the system will determine that the opening has failed, thereby triggering further protection actions.

[0212] Depending on the number of fast mechanical switches that failed to open, the system decides whether to report the fault information and mark it for repair or try to open it again. When the number of switches that failed to open is greater than 1, the system will output the information that the abnormal switch needs to be forced to open and wait for repair to prevent the fault from spreading to the entire system.

[0213] Figure 8 A logic diagram of a fast mechanical switch closing failure protection provided in an embodiment of the present application is shown in FIG. Figure 8 As shown, the switch protection device 15 receives the opening command issued by the controller 14, and after a preset delay time, for example, 2ms, receives the closing position information of each fast mechanical switch and the voltage of the opening capacitor sent by the interface device 11. It is judged whether the closing position information is valid and the voltage of the opening capacitor has not changed. If the conditions are met, it is determined that the current fast mechanical switch fails to open, and it is judged whether the number of fast mechanical switches that fail to open is not greater than 1. If it is not greater than 1, the opening failure information is reported, and the current fast mechanical switch that fails to open is output. Maintenance information, if the number of opening failures is greater than 1, try to re-open these switches. After re-opening, the number of switches that failed to open is judged again.

[0214] If the number of switches that failed to open after re-opening is greater than 1, the output is that the abnormal switch needs to be forced to open and is waiting for maintenance; if the number of switches that failed to open after re-opening is less than 1, the output is that the fast mechanical switch that currently failed to open is waiting for maintenance.

[0215] Fig. 9 A schematic diagram of a fast mechanical switch protection action opening and closing state provided in an embodiment of the present application is shown in FIG. Fig. 9 As shown, when the fast mechanical switch is closed, its spring holding mechanism is at the top, and when it is open, its spring holding mechanism is at the bottom. The middle position is not the spring holding mechanism stuck position. When the moving contact of the mechanical switch break is in the middle position, it is neither the open state nor the closed state. At this time, the mechanical switch protection device is required to perform protection opening and closing operations. The protection output mechanical switch is still in an abnormal state after opening and closing, that is, the opening and closing state of the fast mechanical switch is unknown after the fast mechanical switch protection action opens and closes, and the fast mechanical switch debugging device is required to perform forced opening and closing control of a single break.

[0216] The above is a detailed introduction to the high-voltage DC circuit breaker fast mechanical switch debugging device and method provided by the present application. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can refer to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

[0217] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

Claims

1. A high-voltage DC circuit breaker fast mechanical switch debugging device, applied to multiple fast mechanical switches, characterized in that: include: Multiple interface devices, switch control devices, switch monitoring devices, controllers; Each of the interface devices is connected to each of the fast mechanical switches respectively; The switch control device and the switch monitoring device are connected to each of the interface devices, and the controller is connected to the switch control device and the switch monitoring device; When the fast mechanical switch is powered off, the controller sends an opening and closing instruction to the switch control device, so that the switch control device sends an opening and closing control signal to each of the interface devices according to the opening and closing instruction, and the interface device receives the opening and closing control signal and controls the corresponding fast mechanical switch to perform corresponding opening and closing operations; the switch monitoring device obtains the opening and closing status of the fast mechanical switch through the interface device and sends the monitoring data to the controller in real time, and the controller determines whether each of the fast mechanical switches is normal according to the opening and closing instruction and the monitoring data.

2. The high-voltage DC circuit breaker fast mechanical switch debugging equipment according to claim 1, characterized in that: Also included: a switch protection device; The switch protection device is connected to each of the interface devices, and the controller is connected to the switch protection device; The switch protection device obtains the opening and closing status of the fast mechanical switch through the interface device, and determines the abnormal break of each fast mechanical switch according to the opening and closing status of the fast mechanical switch and the opening and closing instructions sent by the controller, and controls the abnormal break of each fast mechanical switch to perform protection action.

3. The high-voltage DC circuit breaker fast mechanical switch debugging equipment according to claim 2, characterized in that: The interface device includes a first interface, a second interface, and an interface processor; the switch control device includes a first system and a second system; The first interface and the second interface are connected to the first system and the second system of the switch control device respectively; The first system and the second system simultaneously send opening and closing control signals to the first interface and the second interface of the interface device, and one of the systems acts as a main system to send opening and closing control signals carrying a duty flag, and the other system acts as a backup system to send opening and closing control signals carrying a standby flag; the interface processor receives the opening and closing control signals sent by the first interface and the second interface, parses the opening and closing control signals and executes the opening and closing control signals corresponding to the duty flag.

4. The high-voltage DC circuit breaker fast mechanical switch debugging equipment according to claim 3, characterized in that: The interface device further includes: a charging power supply and a trigger discharge circuit; the charging power supply supplies power to the first interface and the second interface; the charging power supply charges the opening capacitor or the closing capacitor in the trigger discharge circuit; The interface processor generates a trigger electrical signal according to the opening and closing control signal corresponding to the duty flag and sends it to the trigger discharge circuit, so that the corresponding thyristor of the trigger discharge circuit is turned on, so that the opening capacitor or the closing capacitor discharges the repulsion mechanism coil, and drives the fast mechanical switch to perform the corresponding opening or closing operation.

5. The high-voltage DC circuit breaker fast mechanical switch debugging equipment according to claim 4, characterized in that: The interface device also includes: two position sensors; The two position sensors respectively obtain the opening position and closing position of the fast mechanical switch; the interface processor receives the opening position and closing position and sends them to the switch monitoring device and the switch protection device through the first interface and the second interface.

6. The high-voltage DC circuit breaker fast mechanical switch debugging equipment according to claim 4, characterized in that: The interface device further comprises: a switch-off capacitor capacitance detection module and a switch-on capacitor capacitance detection module; The opening capacitor capacitance detection module detects the opening capacitor and sends the opening capacitor capacitance to the interface processor, and the closing capacitor capacitance detection module detects the closing capacitor capacitance and sends the closing capacitor capacitance to the interface processor; The interface processor sends the opening capacitor capacitance value and the closing capacitor capacitance value to the switch monitoring device and the switch protection device through the first interface and the second interface.

7. The high-voltage DC circuit breaker fast mechanical switch debugging equipment according to claim 4, characterized in that: The interface device also includes: a closing position monitoring optical fiber sensor, an effective opening position monitoring optical fiber sensor, and an opening position monitoring optical fiber sensor; The closing position monitoring optical fiber sensor, the effective opening distance position monitoring optical fiber sensor, and the opening position monitoring optical fiber sensor respectively monitor the movement of the baffle to the effective position to obtain the closing termination time, the opening to effective opening distance termination time, and the opening termination time, and send them to the interface processor; The interface processor sends the closing termination time, the opening to effective opening distance termination time, and the opening termination time to the switch monitoring device through the first interface and the second interface; The switch monitoring device obtains the effective closing time, the opening to effective opening distance time, and the opening effective time according to the closing termination time, the opening to effective opening distance termination time, the opening termination time, and the start time when the controller sends the opening and closing instructions.

8. A method for fast mechanical switch debugging of a high-voltage DC circuit breaker, characterized in that: A fast mechanical switch debugging device for a high-voltage DC circuit breaker includes: a plurality of interface devices, a switch control device, a switch monitoring device, and a controller; each of the interface devices is connected to each of the fast mechanical switches; the switch control device and the switch monitoring device are connected to each of the interface devices, and the controller is connected to the switch control device and the switch monitoring device; the method includes: When the fast mechanical switch is powered off, an opening and closing instruction is sent to the switch control device, so that the switch control device sends an opening and closing control signal to each of the interface devices according to the opening and closing instruction, and the interface device receives the opening and closing control signal and controls the corresponding fast mechanical switch to perform the corresponding opening and closing operation; Receiving the opening and closing state monitoring data of the fast mechanical switch acquired by the switch monitoring device through the interface device; Determine whether each of the fast mechanical switches is normal according to the opening and closing instructions and the monitoring data.

9. The high-voltage DC circuit breaker fast mechanical switch debugging method according to claim 8, characterized in that: The interface device includes a first interface, a second interface, and an interface processor; the switch control device includes a first system and a second system; the first interface and the second interface are connected to the first system and the second system of the switch control device respectively; The switch control device sending the opening and closing control signal to each of the interface devices according to the opening and closing instruction includes: The first system and the second system of the switch control device simultaneously send opening and closing control signals to the first interface and the second interface of the interface device, and one of the systems acts as a main system to send opening and closing control signals carrying a duty flag, and the other system acts as a backup system to send opening and closing control signals carrying a standby flag; Correspondingly, the interface device receives the opening and closing control signal and controls the corresponding fast mechanical switch to perform the corresponding opening and closing operation, including: The interface processor receives the opening and closing control signals sent by the first interface and the second interface; The interface processor parses the opening and closing control signal, and executes the opening and closing control signal corresponding to the duty flag to control the corresponding fast mechanical switch to perform corresponding opening and closing operations.

10. The high-voltage DC circuit breaker fast mechanical switch debugging method according to claim 9, characterized in that: The interface processor analyzes the opening and closing control signal, and executes the opening and closing control signal corresponding to the duty flag to control the corresponding fast mechanical switch to perform the corresponding opening and closing operation, including: If both closing control signals received by the interface processor carry the duty flag, the closing control signal corresponding to the main system is selected; If the two opening and closing control signals received by the interface processor both carry the standby flag, the latter is selected as the control signal corresponding to the standby system.

11. The high-voltage DC circuit breaker fast mechanical switch debugging method according to claim 9, characterized in that: When the interface processor receives only one control signal, the method further includes: If the analysis of the opening and closing control signal shows that it carries a duty flag, the opening and closing control signal is executed; If the analysis of the opening and closing control signal shows that it carries a standby flag, the opening and closing control signal will not be responded to, and the initial state of the fast mechanical switch will be maintained.

12. The high-voltage DC circuit breaker fast mechanical switch debugging method according to claim 11, characterized in that: Also includes: When two-way receiving communication failure occurs between the switch control device and the interface device, the switch control device sends out a communication alarm signal to maintain the initial state of the fast mechanical switch.

13. The high-voltage DC circuit breaker fast mechanical switch debugging method according to claim 9, characterized in that: The high-voltage DC circuit breaker fast mechanical switch debugging device further includes: a switch protection device; the switch protection device is connected to each of the interface devices, and the controller is connected to the switch protection device; the method further includes: Sending the opening and closing instructions to the switch protection device, so that the switch protection device determines the abnormal break of each fast mechanical switch according to the opening and closing state of the fast mechanical switch and the opening and closing instructions sent by the controller, and controls the abnormal break of each fast mechanical switch to perform protection action; Wherein, the switch protection device obtains the opening and closing status of the fast mechanical switch through the interface device.

14. The high-voltage DC circuit breaker fast mechanical switch debugging method according to claim 13, characterized in that: When the opening and closing instruction is a closing instruction, the switch protection device determines the abnormal break of each fast mechanical switch according to the opening and closing state of the fast mechanical switch and the opening and closing instruction sent by the controller, and controls the abnormal break of each fast mechanical switch to perform a protection action, including: After receiving the closing command sent by the controller, after a preset delay time, receiving the opening position information of each of the fast mechanical switches and the voltage of the closing capacitor sent by the interface device; Determining whether the opening position information is valid and the voltage of the closing capacitor is not reduced; If yes, it is determined that the current closing of the fast mechanical switch fails; Determining whether the number of the fast mechanical switches that failed to close is not greater than 1; If it is not greater than 1, the current closing failure information is reported, and a closing control signal is sent to the interface device corresponding to the fast mechanical switch that failed to close, so as to control the corresponding fast mechanical switch to reclose; If the fast mechanical switch recloses successfully, a high-voltage DC circuit breaker closing success signal is output, and the abnormal fast mechanical switch carries a maintenance waiting information; If it is greater than 1 or the fast mechanical switch fails to reclose, the fast mechanical switch that fails to close is controlled to self-disconnect; If the self-disconnection is successful, the output high-voltage DC circuit breaker is in the open state, and the abnormally fast mechanical switch is waiting for maintenance information; If the self-disconnection fails, the opening and closing status of the output high-voltage DC circuit breaker is unknown, and the abnormal fast mechanical switch needs to be forced to open and wait for maintenance information.

15. The high-voltage DC circuit breaker fast mechanical switch debugging method according to claim 13, characterized in that: When the opening and closing instruction is an opening instruction, the switch protection device determines the abnormal break of each of the fast mechanical switches according to the opening and closing state of the fast mechanical switch and the opening and closing instruction sent by the controller, and controls the abnormal break of each of the fast mechanical switches to perform a protection action, including: After receiving the opening command issued by the controller, after a preset delay time, receiving the closing position information of each of the fast mechanical switches and the voltage of the opening capacitor sent by the interface device; Determining whether the closing position information is valid and the voltage of the opening capacitor does not change; If yes, it is determined that the current opening of the fast mechanical switch fails; Determining whether the number of the fast mechanical switches that failed to open is not greater than 1; If it is not greater than 1, the current opening failure information is reported, and the maintenance information of the fast mechanical switch that failed to open is output; If it is greater than 1, a switch-off control signal is sent to the interface device corresponding to the fast mechanical switch that failed to open, so as to control the corresponding fast mechanical switch to open again; If the number of the fast mechanical switches that failed to open after re-opening is greater than 1, the fast mechanical switch with abnormal output needs to be forced to open and wait for maintenance information; If the number of the fast mechanical switches that failed to open after re-opening is less than 1, the maintenance information of the fast mechanical switches that currently failed to open is output.

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