WO2024077658A1

WO2024077658A1 - Energy dissipation apparatus and switch-in control method therefor

Info

Publication number: WO2024077658A1
Application number: PCT/CN2022/126929
Authority: WO
Inventors: 范彩云; 马俊杰; 赵正一; 陈同浩; 董朝阳; 马太虎; 王蓉东; 冯敏; 刘静一; 李文雅; 黄永瑞; 雍进玲; 王佳佳; 张锐; 冉贤贤; 田世克; 徐万; 邹复春; 肖彬; 赵起超
Original assignee: 许继集团有限公司; 许继电气股份有限公司
Priority date: 2022-10-14
Filing date: 2022-10-24
Publication date: 2024-04-18
Also published as: CN115622013A

Abstract

An energy dissipation apparatus and a switch-in control method therefor, which belong to the technical field of energy dissipation apparatuses. The method comprises: when an energy dissipation apparatus is allowed to be switched in and a received energy dissipation apparatus switch-in instruction is valid, issuing a closing command to control switches of all phases in the energy dissipation apparatus, such that the control switches execute a closing action, wherein the energy dissipation apparatus being allowed to be switched in indicates that the energy dissipation apparatus meets a switch-in condition; and when closed-position states fed back by the control switches of all the phases are received within a required time, determining that the control switches of all the phases are closed successfully, thereby completing the switch-in of the energy dissipation apparatus. The whole method has simple logic, but is highly practical; facilitates the engineering implementation of an energy dissipation apparatus; effectively solves the problem of overvoltage of an alternating-current bus; and improves the power delivery capacity of a direct-current line.

Description

Energy dissipation device and input control method thereof

Technical Field

The invention belongs to the technical field of energy dissipation devices, and in particular relates to an energy dissipation device and an input control method thereof.

Background technique

In recent years, UHV DC transmission technology has developed rapidly. Several UHV DC transmission projects have been built and put into operation in China, which has greatly solved the problem of domestic electricity shortage. As my country strives to achieve the goal of "carbon peak and carbon neutrality", the hub role of high-voltage power grid has become more prominent, and it will play a more active role in achieving "carbon peak and carbon neutrality" in my country's energy field.

The power delivered by DC transmission lines often fails to reach the design value. The main limiting factors are the transient overvoltage of the commutation busbar at the sending end and the static stability limit of the UHV at the receiving end. When a bipolar DC fault occurs in high-power mode (bipolar commutation failure, bipolar blocking, bipolar line restart), the AC system and AC filter generate a large amount of excess reactive power during the DC power interruption, causing transient overvoltage exceeding the system control level at the converter station, which is the main problem constraining DC power.

In order to solve the above-mentioned system overvoltage problem, an energy dissipation device can be installed on the AC busbar of the converter station. The energy dissipation device includes three-phase primary equipment. The primary equipment of each phase includes multiple lightning arrester branches arranged between the incoming line terminal and the grounding terminal. Each lightning arrester branch is provided with a lightning arrester fixed element and a lightning arrester controlled element. All lightning arrester fixed elements are connected in parallel, all lightning arrester controlled elements are connected in parallel, and the control switch is connected in parallel with all lightning arrester controlled elements. Its working mode is that when a system failure occurs, the pole control system sends an input instruction to the energy dissipation device. After receiving the input instruction, the energy dissipation device sends a control switch closing command. After the control switch is turned on, the lightning arrester controlled element is short-circuited, which reduces the overall protection level of the lightning arrester and deeply suppresses the system overvoltage. The prior art basically follows this basic working mode to put the energy dissipation device into operation, but this working mode has some problems. For example, the energy dissipation device may have absorbed energy and reached its energy over-limit self-locking value. After receiving the start-up command issued by the extreme control system cabinet, the energy dissipation device status is not considered and its start-up is directly controlled. The energy dissipation device is meaningless to be put into operation, and the problem of system overvoltage cannot be solved. For example, the control switch is abnormal, resulting in a very long closing time. After the control switch closing command is issued, these factors are not considered and it is directly determined that the control switch will be closed successfully. This will also make the energy dissipation device meaningless to be put into operation and the problem of system overvoltage cannot be solved.

Summary of the invention

The object of the present invention is to provide an energy dissipation device and a method for controlling the input of the energy dissipation device, so as to solve the problem that the method in the prior art causes the input of the energy dissipation device to be meaningless and cannot solve the problem of system overvoltage.

In order to solve the above technical problems, the technical solutions provided by the present invention and the beneficial effects produced by the technical solutions are as follows:

A method for controlling the start-up of an energy dissipation device of the present invention comprises the following steps: 1) when the start-up of the energy dissipation device is permitted and the received start-up instruction of the energy dissipation device is valid, a closing command is issued to each phase control switch in the energy dissipation device, so that the control switch executes the closing action; wherein, the start-up of the energy dissipation device is permitted means that the energy dissipation device meets the start-up conditions; 2) when the closed state feedback from all phase control switches is received within the required time, it is determined that all phase control switches are closed successfully, and the start-up of the energy dissipation device is completed.

The beneficial effects are as follows: the present invention issues a command to close the control switch only when the energy dissipation device is allowed to be put into operation and the instruction to put the energy dissipation device into operation is determined to be valid, thereby ensuring the effective start-up of the energy dissipation device, and only after receiving the closed state feedback from all phase control switches within the required time will the control switch be determined to be closed successfully, so as to complete the start-up of the energy dissipation device, thereby accurately obtaining the start-up state of the energy dissipation device. The entire method is simple in logic but highly practical, which is helpful for the engineering implementation of the energy dissipation device, effectively solves the problem of AC bus overvoltage, and improves the power transmission capacity of the DC line.

Furthermore, the conditions for allowing the energy dissipation device to be put into operation include: the control switches of each phase are allowed to be closed, the lightning arresters of each phase are allowed to be closed, the circuit breakers located at the incoming line positions of each phase AC bus are in the closed state, and the control device is normal; wherein, the control device is used to receive the energy dissipation device start-up instruction and issue a closing command to the control switches of each phase, and the conditions for satisfying the normal control device include: the self-test of the control device is normal, and the control device and other devices in the energy dissipation device except its uplink communication device can communicate normally.

The beneficial effects are: comprehensive detection and judgment of the control switch, lightning arrester, circuit breaker and control device are carried out, and the energy dissipation device is judged to meet the conditions for being put into use only when each device is fault-free, thereby ensuring the effectiveness of the energy dissipation device being put into use.

Furthermore, the conditions for allowing the closing of each phase control switch include: the closing of the trigger switches in each phase control switch is allowed and the closing of the bypass switches in each phase control switch is allowed; the conditions for allowing the closing of the trigger switch include: the trigger switch controller and its downstream communication equipment in the energy dissipation device can communicate normally, the capacitor voltage in the trigger switch is normal, and the position of the trigger switch is normal; the conditions for allowing the closing of the bypass switch include: the closing oil pressure of the bypass switch is normal, the sulfur hexafluoride pressure is normal, and the bypass switch self-locking signal is invalid.

The beneficial effect is: the bypass switch and the trigger switch in the control switch are fully detected and judged, and the control switch is judged to meet the closing permission only when both the bypass switch and the trigger switch are fault-free, thereby ensuring the effectiveness of the energy dissipation device.

Furthermore, the conditions for satisfying the permission of closing all lightning arresters of a certain phase include: the energy absorbed by the energy dissipation device of the phase is less than or equal to the energy over-limit self-locking value of the lightning arrester of the phase.

Its beneficial effect is: by detecting whether the energy dissipation device has absorbed energy to determine whether the arrester self-locking signal is effective, it can accurately and in real time determine whether the arrester is allowed to close.

Further, if the closed state fed back by the trigger switch in a certain phase control switch is received within the time t ₀ + △t ₀ , or the closed state fed back by the bypass switch in the phase control switch is received within the time t ₁ + △t ₁ , it indicates that the closed state fed back by the phase control switch is received; wherein, t ₀ represents the maximum value of the closing action time of the trigger switch, △t ₀ represents the set margin time of the trigger switch, t ₁ represents the maximum value of the closing action time of the bypass switch, and △t ₁ represents the set margin time of the bypass switch.

The beneficial effect is that, taking into account factors such as communication delay and the action time of the intermediate relay in the bypass switch, the required time corresponding to the control switch includes a set margin time to prevent the occurrence of erroneous judgment caused by the required time being set too short.

Furthermore, the energy dissipation device activation instruction being effective means that the on-duty pole control instruction of any pole control system in the multi-pole pole control system communicating with the energy dissipation device is the energy dissipation device activation instruction.

An energy dissipation device of the present invention comprises a control protection device and a three-phase primary device; the control protection device comprises a control device, and the control device is used to communicate with a pole control system; the primary device of each phase comprises a plurality of lightning arrester branches arranged between an incoming line terminal and a grounding terminal, each lightning arrester branch is provided with a lightning arrester fixed element and a lightning arrester controlled element, all the lightning arrester fixed elements are connected in parallel, all the lightning arrester controlled elements are connected in parallel, and a control switch is connected in parallel with all the lightning arrester controlled elements, and the control device is used when it is necessary to put the energy dissipation device into operation: when the energy dissipation device is allowed to be put into operation and the received energy dissipation device input instruction is valid, a closing command is issued to each phase control switch in the energy dissipation device, so that the control switch executes a closing action; wherein, the energy dissipation device is allowed to be put into operation means that the energy dissipation device meets the conditions for being put into operation; when the closed state fed back by all phase control switches is received within the required time, it is determined that the control switch is closed successfully, and the energy dissipation device is put into operation.

The beneficial effects are as follows: the energy dissipation device of the present invention includes a control device, which issues a command to close the control switch only when it is determined that the control energy dissipation device is allowed to be put into operation and the energy dissipation device input instruction is valid, thereby ensuring the effective input of the energy dissipation device, and only when the closed state feedback from all phase control switches is received within the required time will the control switch be determined to be successfully closed, so as to complete the input of the energy dissipation device, thereby accurately obtaining the input state of the energy dissipation device. The entire method is simple in logic but highly practical, which is helpful for the engineering implementation of the energy dissipation device, effectively solves the problem of AC bus overvoltage, and improves the power transmission capacity of the DC line.

Further, the conditions for allowing the energy dissipation device to be put into operation include: the closing of each phase control switch is allowed, the closing of each phase lightning arrester is allowed, the circuit breakers located at the incoming line position of each phase AC bus are in the closed state, and the control device is normal; wherein, the control device is used to receive the energy dissipation device input instruction issued by the pole control system and issue a closing command to each phase control switch; the conditions for satisfying the normal control device include: the self-test of the control device is normal, and the control device and the trigger switch controller in the energy dissipation device, the protection device and the measurement and control device included in the control protection device can communicate normally; the conditions for allowing the closing of each phase control switch include: the closing of the trigger switch in each phase control switch is allowed and the closing of the bypass switch in each phase control switch is allowed; the conditions for allowing the closing of the trigger switch include: the trigger switch controller and its downstream communication equipment in the energy dissipation device can communicate normally, the capacitor voltage in the trigger switch is normal, and the position of the trigger switch is normal; the conditions for allowing the closing of the bypass switch include: the closing oil pressure of the bypass switch is normal, the sulfur hexafluoride pressure is normal, and the self-locking signal of the bypass switch is invalid.

The beneficial effects are as follows: the control switch, lightning arrester, circuit breaker and control device are fully tested and judged, and the energy dissipation device is judged to meet the conditions for being put into operation only when each device is fault-free, thereby ensuring the effectiveness of the energy dissipation device being put into operation. In addition, the bypass switch and trigger switch in the control switch are fully tested and judged, and the control switch is judged to meet the conditions for closing only when both the bypass switch and the trigger switch are fault-free, thereby ensuring the effectiveness of the energy dissipation device being put into operation.

Further, if the closed state fed back by the trigger switch in a certain phase control switch is received within the time t ₀ + △t ₀ , or the closed state fed back by the bypass switch in the phase control switch is received within the time t ₁ + △t ₁ , it is determined that the phase control switch is closed successfully; wherein t ₀ represents the maximum value of the closing action time of the trigger switch, △t ₀ represents the set margin time, t ₁ represents the maximum value of the closing action time of the bypass switch, and △t ₁ represents the set margin time.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a single-phase energy dissipation device of the present invention;

2 is a schematic diagram showing the connection between the control device and the pole control system in the energy dissipation device of the present invention;

3 is a flow chart of the energy dissipation device input control method of the present invention;

FIG. 4 is a flow chart of the control of the single-phase energy dissipation device of the present invention.

Detailed ways

The present invention refines the input conditions of the energy dissipation device, and only sends a closing command to the control switch when the received energy dissipation device input instruction is valid and the energy dissipation device input is allowed, and only when the closed state feedback from all phase control switches is received within the required time can the energy dissipation device be judged to be successfully put into operation, thereby ensuring that the input of the energy dissipation device is meaningful and providing a reference for the engineering design of the control logic of the energy dissipation device.

In order to make the above-mentioned purposes, technical solutions and advantages clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present invention.

Energy dissipation device embodiment:

An embodiment of an energy dissipation device of the present invention is an AC controllable self-restoring energy dissipation device, which is installed on the AC bus lead-out line of the converter station. The principle diagram of the single-phase (taking phase A as an example) energy dissipation device is shown in Figure 1. The entire energy dissipation device includes a three-phase primary device, a three-phase measurement system and a control and protection device.

As shown in Figure 1, the primary equipment of each phase includes multiple lightning arrester branches arranged between the incoming line terminal and the grounding terminal. A lightning arrester fixed element and a lightning arrester controlled element are arranged on each lightning arrester branch, and all lightning arrester fixed elements are connected in parallel, and all lightning arrester controlled elements are also connected in parallel. The control switch includes a trigger switch CATS and a bypass switch CABS. The trigger switch CATS is connected in parallel with all lightning arrester controlled elements, and the bypass switch CABS is also connected in parallel with all lightning arrester controlled elements. An incoming line circuit breaker DL is arranged on the incoming line terminal of the AC busbar of each phase. Each phase trigger switch is configured with two redundant trigger switch controllers, and each trigger switch controller can independently complete the signal acquisition and control functions of the trigger switch. It should be noted that the trigger switch controller belongs to the primary equipment and is arranged on the same ground as the trigger switch.

The measurement system of each phase includes a current transformer BCT for detecting the line current of the lightning arrester fixed element, a current transformer CT for detecting the grounding current, and a voltage transformer PT for detecting the voltage of the lightning arrester controlled element. All current transformers BCT are connected to the data acquisition unit to convert the electrical signals collected by the current transformer BCT into optical signals for transmission.

The control and protection device includes two redundant control devices, three redundant protection devices and two redundant measurement and control devices. The redundant configuration of the control device and the protection device is based on reliability considerations, and the three redundant configuration of the protection device is based on the consideration of meeting the "three out of two" protection requirement. The functions of the control and protection device include: AC bus incoming line circuit breaker position signal acquisition, receiving the energy dissipation device input command issued by the centralized control, state signal acquisition of the three-phase trigger switch CATS and the bypass switch CABS, closing control of the three-phase trigger switch CATS and the bypass switch CABS, closing action result determination of the three-phase trigger switch CATS and the bypass switch CABS, internal communication status monitoring of the control and protection device, communication status monitoring of the control and protection device and the sensor acquisition unit in the measurement system, and calculation of the energy absorbed by the fixed element of the lightning arrester after the energy dissipation device is put into operation. The control device and the pole control system, the trigger switch, the protection device and the measurement and control device all have cross-redundant communication. In this embodiment, the pole control system is a bipolar pole control system. Similarly, the redundant configuration of the pole control system is based on reliability considerations.

When an overvoltage fault occurs in the system, as shown in FIG3 and FIG4 , the bipolar pole control system sends an energy dissipation device startup instruction to the energy dissipation device, and then the energy dissipation device is started using the following method (i.e., an energy dissipation device startup control method of the present invention):

1) The control device determines whether the energy dissipation device input instruction is valid. The control device redundantly processes the energy dissipation device input instruction issued by the pole control system. As shown in Figure 2, the control device and the bipolar pole control system cross-redundantly communicate, that is, the two redundant control devices are control device host A and control device host B, the bipolar control systems are DC system pole control 1 and DC system pole control system 2, each pole control system includes two redundant pole control systems, DC system pole control 1 (or DC system pole control 2) host A and DC system pole control 1 (or DC system pole control 2) host B, and each control device is connected to each pole control system. For a certain control device, when receiving the bipolar pole control instruction, it only responds to the duty pole control instruction. If the duty pole control instruction of any pole pole control system is the energy dissipation device input instruction, it indicates that the energy dissipation device input instruction is valid. It should be noted that, since the energy dissipation device needs to be put into operation to reduce the system overvoltage level when any pole has an overvoltage fault, the duty pole control instruction of any pole pole control system is the energy dissipation device input instruction, and the closing operation is performed.

2) The control device determines whether the energy dissipation device is allowed to be put into operation. If the trigger switch, bypass switch and lightning arrester of a phase are all allowed to be closed, it means that the single-phase is allowed to be put into operation. If all three phases are allowed to be put into operation, the three-phase incoming line circuit breakers are all in the closed state and the control device is normal, it means that the energy dissipation device is allowed to be put into operation. Otherwise, it means that the energy dissipation device is invalid. Specific:

If the trigger switch controller and any of its downstream communication devices can communicate normally, the trigger switch capacitor voltage is normal and there is no abnormality in the trigger switch position, it indicates that the trigger switch closing is allowed.

If the bypass switch closing oil pressure is normal, the _SF6 pressure is normal and the bypass switch self-locking signal is invalid, it means that the bypass switch closing is allowed.

The protection device calculates the energy absorbed by the energy dissipation device each time it is put into operation based on the current collected by the current transformer CT. When the absorbed energy is greater than the arrester energy over-limit self-locking value, it indicates that the arrester self-locking signal is valid, that is, the arrester closing permission is invalid. Otherwise, it indicates that the arrester closing permission is valid.

If the control device self-checks normally, the control device can communicate normally with any protection device, the control device can communicate normally with any uplink device of the trigger switch, and the control device can communicate normally with any measurement and control device, then the control device is normal. In addition, the redundant controller of the single-phase trigger switch has cross-redundant communication with the control device, and any uplink of each phase trigger switch communicates normally with the control device, and the conditions are met.

3) When the judgment result of step 1) is that the energy dissipation device input instruction is valid and the judgment result of step 2) is that the energy dissipation device input is allowed, the control device simultaneously issues a closing command for each phase control switch, and the trigger switch and bypass switch of each phase execute the closing action.

4) The trigger switch and bypass switch feedback the switch status to the control device, and the control device determines the action result according to the action characteristics of the switch: if the control device receives the feedback switch closing status within the required time, it is determined that the control switch is closed successfully, otherwise it is determined that the control switch fails to close. If the single-phase trigger switch fails to close and the bypass switch fails to close, the closing of that phase fails; if any phase fails to close, the energy dissipation device fails to be put into operation.

According to the action characteristics of the trigger switch, its closing action time is less than t ₀ ms. Considering the communication delay and a certain margin, a margin time △t ₀ (△t ₀ =5 ms in this embodiment) is set. If the control device receives a closing state feedback of a certain phase trigger switch within (t ₀ +5) ms, it is determined that the closing of the phase trigger switch is successful, otherwise it is determined that the closing of the phase trigger switch fails. According to the action characteristics of the bypass switch, its closing action time is less than t ₁ ms. The closing control loop and the closing feedback loop of the bypass switch are both electrical signals. Considering the action time of the intermediate relay and a certain margin, a margin time △t ₁ (△t ₁ =60 ms in this embodiment) is set. If the control device receives a closing state feedback of a certain phase bypass switch within (t ₁ +60) ms, it is determined that the closing of the phase bypass switch is successful, otherwise it is determined that the closing of the phase bypass switch fails.

5) The control device feeds back the status of the energy dissipation device to the pole control system, including the successful input status and the failed input status (i.e., the fault status).

It should be noted that the two control devices in the energy dissipation device in this embodiment both execute the closing control method, and any one of the control devices can complete the control function normally.

In summary, the above method realizes the functions of pole control input instruction processing, input condition judgment of energy dissipation device, automatic closing of trigger switch and bypass switch and input status judgment of energy dissipation device, which is helpful for the engineering implementation of energy dissipation device, effectively solves the overvoltage problem of AC bus, and improves the power transmission capacity of DC line.

Energy dissipation device input control method embodiment:

The present invention provides a method for controlling the input of an energy dissipation device, which realizes functions such as processing of polar control input instructions, judging the input conditions of the energy dissipation device, automatically closing the trigger switch and the bypass switch, and judging the input state of the energy dissipation device, and specifically includes:

1) When the energy dissipation device is allowed to be put into operation (all phase control switches are allowed to be closed, all phase lightning arresters are allowed to be closed, the circuit breakers located at the incoming line positions of each phase AC bus are in the closed state, and the control device is normal) and the received energy dissipation device input instruction is valid (the on-duty pole control instruction of any pole control system in the multi-pole pole control system communicating with the energy dissipation device is the energy dissipation device input instruction), a closing command is issued to each phase control switch in the energy dissipation device, so that the control switch performs the closing action;

2) If the closed state feedback from the trigger switch in a certain phase control switch is received within the time t0+△t0, or the closed state feedback from the bypass switch in the phase control switch is received within the time t1+△t1, it indicates that the closed state feedback from the phase control switch is received; if the closed state feedback from all phase control switches is received, it is determined that all phase control switches are closed successfully and the energy dissipation device is put into operation.

The specific implementation process of this method has been described in detail in the embodiment of the energy dissipation device, and the embodiment of the energy dissipation device input control method will not be repeated here.

Specific implementation methods are given above, but the present invention is not limited to the described implementation methods. The basic idea of the present invention lies in the above basic scheme. For ordinary technicians in this field, it does not take creative work to design various deformed models, formulas, and parameters according to the teachings of the present invention. Changes, modifications, substitutions, and variations of the implementation methods without departing from the principles and spirit of the present invention still fall within the scope of protection of the present invention.

Claims

A method for controlling the input of an energy dissipation device, characterized in that it comprises the following steps:

1) When the energy dissipation device is allowed to be put into operation and the received energy dissipation device input instruction is valid, a closing command is issued to each phase control switch in the energy dissipation device, so that the control switch performs the closing action; wherein, the energy dissipation device is allowed to be put into operation means that the energy dissipation device meets the conditions for being put into operation;

2) When the closed state feedback from all phase control switches is received within the required time, it is determined that all phase control switches are closed successfully and the energy dissipation device is put into operation.
According to the energy dissipation device start-up control method of claim 1, it is characterized in that the conditions for satisfying the permission of the energy dissipation device to be started include: the closing of each phase control switch is allowed, the closing of each phase lightning arrester is allowed, the circuit breakers located at the incoming line position of each phase AC bus are in the closed state, and the control device is normal; wherein, the control device is used to receive the energy dissipation device start-up instruction and issue a closing command to each phase control switch, and the conditions for satisfying the normal control device include: the self-test of the control device is normal, and the control device and other devices in the energy dissipation device except its uplink communication device can communicate normally.
The energy dissipation device startup control method according to claim 2 is characterized in that the conditions for allowing the closing of each phase control switch include: the closing of the trigger switch in each phase control switch is allowed and the closing of the bypass switch in each phase control switch is allowed; the conditions for allowing the closing of the trigger switch include: the trigger switch controller and its downstream communication equipment in the energy dissipation device can communicate normally, the capacitor voltage in the trigger switch is normal, and the position of the trigger switch is normal; the conditions for allowing the closing of the bypass switch include: the closing oil pressure of the bypass switch is normal, the sulfur hexafluoride pressure is normal, and the bypass switch self-locking signal is invalid.
The energy dissipation device startup control method according to claim 2 is characterized in that the conditions for satisfying the permission of closing all lightning arresters of a certain phase include: the energy absorbed by the energy dissipation device of the phase is less than or equal to the energy over-limit self-locking value of the lightning arrester of the phase.
The energy dissipation device startup control method according to claim 1 is characterized in that if the closed state fed back by the trigger switch in a certain phase control switch is received within the time t 0 + △t 0 , or the closed state fed back by the bypass switch in the phase control switch is received within the time t 1 + △t 1 , it indicates that the closed state fed back by the phase control switch is received; wherein t 0 represents the maximum value of the closing action time of the trigger switch, △t 0 represents the set margin time of the trigger switch, t 1 represents the maximum value of the closing action time of the bypass switch, and △t 1 represents the set margin time of the bypass switch.
According to the energy dissipation device startup control method according to any one of claims 1 to 5, it is characterized in that the energy dissipation device startup instruction is effective means that the on-duty pole control instruction of any pole control system in the multi-pole pole control system communicating with the energy dissipation device is the energy dissipation device startup instruction.
An energy dissipation device comprises a control protection device and a three-phase primary device; the control protection device comprises a control device, and the control device is used to communicate with a pole control system; the primary device of each phase comprises a plurality of lightning arrester branches arranged between an incoming line terminal and a grounding terminal, and each lightning arrester branch is provided with a lightning arrester fixed element and a lightning arrester controlled element, all the lightning arrester fixed elements are connected in parallel, all the lightning arrester controlled elements are connected in parallel, and a control switch is connected in parallel with all the lightning arrester controlled elements, and the control device is used to:

When the energy dissipation device is allowed to be put into operation and the received energy dissipation device input instruction is valid, a closing command is issued to each phase control switch in the energy dissipation device, so that the control switch performs the closing action; wherein, the energy dissipation device is allowed to be put into operation means that the energy dissipation device meets the conditions for being put into operation; when the closed state feedback from all phase control switches is received within the required time, it is determined that the control switch is closed successfully and the energy dissipation device is put into operation.
The energy dissipation device according to claim 7 is characterized in that the conditions for allowing the energy dissipation device to be put into operation include: the control switches of each phase are allowed to be closed, the lightning arresters of each phase are allowed to be closed, the circuit breakers located at the incoming line positions of each phase AC bus are in the closed state, and the control device is normal; wherein, the control device is used to receive the energy dissipation device input instruction issued by the pole control system and issue a closing command to the control switches of each phase; the conditions for satisfying the normal control device include: the self-test of the control device is normal, and the control device and the trigger switch controller in the energy dissipation device, the protection device included in the control protection device and the measurement and control device can communicate normally;

The conditions for allowing the closing of each phase control switch include: the closing of the trigger switches in each phase control switch is allowed and the closing of the bypass switches in each phase control switch is allowed; the conditions for allowing the closing of the trigger switch include: the trigger switch controller and its downstream communication equipment in the energy dissipation device can communicate normally, the capacitor voltage in the trigger switch is normal, and the position of the trigger switch is normal; the conditions for allowing the closing of the bypass switch include: the bypass switch closing oil pressure is normal, the sulfur hexafluoride pressure is normal, and the bypass switch self-locking signal is invalid.
The energy dissipation device according to claim 7 is characterized in that if the closed state fed back by the trigger switch in a phase control switch is received within the time t0 +△ t0 , or the closed state fed back by the bypass switch in the phase control switch is received within the time t1 +△t1, it is determined that the phase control switch is closed successfully; wherein t0 represents the maximum value of the closing action time of the trigger switch, △ t0 represents the set margin time, t1 represents the maximum value of the closing action time of the bypass switch, and △ t1 represents the set margin time.
The energy dissipation device according to any one of claims 7 to 9 is characterized in that the energy dissipation device activation instruction is effective means that the on-duty pole control instruction of any pole control system in the multi-pole pole control system communicating with the energy dissipation device is the energy dissipation device activation instruction.