Energy dissipation device and method for putting it into operation

Abstract

The present application belongs to the technical field of energy dissipation device, and particularly relates to an energy dissipation device and a method for putting into operation of the energy dissipation device. When the energy dissipation device is allowed to be put into operation and the received instruction for putting into operation of the energy dissipation device is valid, a closing command is sent to each phase control switch of the energy dissipation device, so that the control switch performs a closing action. The energy dissipation device is allowed to be put into operation, which means that the energy dissipation device meets the put-in condition. When the closing state of all phase control switches is received within a required time, it is determined that the closing of all phase control switches is successful, and the putting into operation of the energy dissipation device is completed. The whole method is simple in logic but strong in practicability, which is helpful for the engineering implementation of the energy dissipation device, effectively solves the problem of overvoltage of an alternating current bus, and improves the power transmission capacity of a direct current line.

Description

Technical Field

[0001] This invention belongs to the field of energy dissipation device technology, specifically relating to an energy dissipation device and its activation control method. Background Technology

[0002] In recent years, ultra-high voltage direct current (UHVDC) transmission technology has developed rapidly, and several UHVDC transmission projects have been built and put into operation in China, greatly alleviating the domestic power shortage problem. The pivotal role of the high-voltage power grid has become more prominent, and it will play a more active role in achieving "carbon peaking and carbon neutrality" in my country's energy sector.

[0003] The power transmission capacity of DC transmission lines often falls short of design values. The main limiting factors are transient overvoltages on the sending-end converter bus and the static stability limits of the receiving-end ultra-high voltage. In high-power operation, bipolar DC faults (bipolar commutation failure, bipolar blocking, bipolar line restart) cause a large amount of excess reactive power to be emitted by the AC system and AC filters during the DC power interruption, resulting in transient overvoltages exceeding the system control level at the converter station. This is the main problem constraining DC power output.

[0004] To address the aforementioned system overvoltage issue, an energy dissipation device can be installed on the AC busbar of the converter station. The energy dissipation device comprises three-phase primary equipment. Each phase's primary equipment includes multiple surge arrester branches located between the incoming and grounding terminals. Each surge arrester branch has one fixed surge arrester element and one controlled surge arrester element. All fixed surge arrester elements and all controlled surge arrester elements are connected in parallel. The control switch is connected in parallel with all controlled surge arrester elements. Its operation is as follows: when a system fault occurs, the polar control system sends an activation command to the energy dissipation device. Upon receiving the activation command, the energy dissipation device issues a control switch closing command. After the control switch is turned on, the controlled surge arrester elements are short-circuited, reducing the overall protection level of the surge arresters and effectively suppressing system overvoltage. Existing technologies generally follow this basic operating method for activating energy dissipation devices. However, this method has some problems. For example, the energy dissipation device may have already absorbed energy and reached its energy over-limit self-locking value. If the activation command is received from the polar control system cabinet, and the energy dissipation device's status is not considered before directly activating it, the activation of the energy dissipation device is meaningless and still cannot solve the system overvoltage problem. Another example is that the control switch malfunctions, causing its closing time to be very long. If the control switch closing command is issued without considering these factors and it is directly assumed that the control switch will definitely close successfully, this will also render the activation of the energy dissipation device meaningless and unable to solve the system overvoltage problem. Summary of the Invention

[0005] The purpose of this invention is to provide an energy dissipation device and its activation control method, so as to solve the problem that the activation of the energy dissipation device is meaningless and cannot solve the problem of system overvoltage caused by the methods in the prior art.

[0006] To solve the above-mentioned technical problems, the technical solution provided by the present invention and the beneficial effects of the technical solution are as follows:

[0007] The present invention provides a method for controlling the activation of an energy dissipation device, comprising the following steps: 1) When the activation of the energy dissipation device is permitted and the received activation command for the energy dissipation device is valid, a closing command is issued to each phase control switch in the energy dissipation device to cause the control switch to perform a closing action; wherein, the activation of the energy dissipation device is permitted means that the energy dissipation device meets the conditions for activation; 2) When the closed status feedback from all phase control switches is received within the required time, it is determined that all phase control switches have been successfully closed, and the activation of the energy dissipation device is completed.

[0008] Its beneficial effects are as follows: This invention issues the control switch closing command only when the energy dissipation device is allowed to be put into operation and the energy dissipation device operation command is determined to be valid, thus ensuring the effective operation of the energy dissipation device. It also determines that the control switch is successfully closed only after receiving feedback of the closed position status from all phase control switches within the required time, thereby completing the operation of the energy dissipation device. This allows for accurate acquisition of the operation status of the energy dissipation device. The entire method is logically simple but highly practical, which helps in the engineering implementation of energy dissipation devices, effectively solves the AC bus overvoltage problem, and improves the power transmission capacity of DC lines.

[0009] Furthermore, the conditions for allowing the energy dissipation device to be put into operation include: all phase control switches are allowed to be closed, all phase surge arresters are allowed to be closed, all circuit breakers located at the AC bus incoming positions of each phase are in the closed position, and the control device is normal; wherein, the control device is used to receive the energy dissipation device to be put into operation command and to issue closing commands to each phase control switch, and the conditions for the control device to be normal include: the control device self-test is normal, and the control device can communicate normally with all other devices in the energy dissipation device except for its uplink communication equipment.

[0010] Its beneficial effects are: comprehensive testing and judgment of control switches, surge arresters, circuit breakers and control devices, and the energy dissipation device is determined to meet the conditions for commissioning only when each device is fault-free, thus ensuring the effectiveness of the energy dissipation device commissioning.

[0011] Furthermore, the conditions for allowing all phase control switches to close include: all trigger switches in each phase control switch and all bypass switches in each phase control switch to close; the conditions for allowing trigger switches to close 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 trigger switch position is normal; the conditions for allowing bypass switches to close include: the bypass switch closing oil pressure is normal, the sulfur hexafluoride pressure is normal, and the bypass switch self-locking signal is invalid.

[0012] Its beneficial effects are: to conduct comprehensive testing and judgment on the bypass switch and trigger switch in the control switch, and to determine that the control switch meets the closing permission only when both the bypass switch and trigger switch are fault-free, thus ensuring the effectiveness of the energy dissipation device.

[0013] Furthermore, the conditions for allowing all phase surge arresters to close include: the energy absorbed by the phase energy dissipation device is less than or equal to the energy over-limit self-locking value of the phase surge arrester.

[0014] Its beneficial effects are: by detecting the energy absorbed by the energy dissipation device to determine whether the surge arrester's self-locking signal is effective, it can accurately and in real time determine whether the surge arrester is allowed to close.

[0015] Furthermore, if a closed state feedback from the trigger switch in a certain phase control switch is received within the time interval t0+Δt0, or a closed state feedback from the bypass switch in the same phase control switch is received within the time interval t1+Δt1, then it indicates that a closed state feedback from the phase control switch has been received; where t0 represents the maximum value of the trigger switch closing action time, Δt0 represents the set trigger switch margin time, t1 represents the maximum value of the bypass switch closing action time, and Δt1 represents the set bypass switch margin time.

[0016] Its beneficial effects are: considering factors such as communication delay and the operating time of the intermediate relay in the bypass switch, the required time corresponding to the control switch includes the set margin time to prevent misjudgment caused by the required time being set too short.

[0017] Furthermore, the effective activation command of the energy dissipation device means that the duty control command of any of the multi-polar control systems communicating with the energy dissipation device is the activation command of the energy dissipation device.

[0018] An energy dissipation device of the present invention includes a control and protection device and three-phase primary equipment. The control and protection device includes a control unit for communicating with a polar control system. Each phase of the primary equipment includes multiple surge arrester branches disposed between the incoming line and the grounding end. Each surge arrester branch is provided with a surge arrester fixed element and a surge arrester controlled element. All surge arrester fixed elements are connected in parallel, all surge arrester controlled elements are connected in parallel, and a control switch is connected in parallel with all surge arrester controlled elements. The control unit is used to, when the energy dissipation device needs to be activated: when the energy dissipation device is allowed to be activated and the received energy dissipation device activation command is valid, issue a closing command to each phase control switch in the energy dissipation device, causing the control switch to perform a closing action; wherein, the energy dissipation device is allowed to be activated means that the energy dissipation device meets the conditions for activation; when the closed position status is received from all phase control switches within the required time, it is determined that the control switch has successfully closed, and the energy dissipation device is activated.

[0019] Its beneficial effects are as follows: The energy dissipation device of the present invention includes a control device. The control device issues a control switch closing command only when it determines that the energy dissipation device is allowed to be put into operation and that the energy dissipation device operation command is valid. This ensures the effective operation of the energy dissipation device. The control switch is only determined to be successfully closed after receiving feedback of the closed position status from all phase control switches within the required time, so as to complete the operation of the energy dissipation device. This allows for accurate acquisition of the operation status of the energy dissipation device. The whole method is logically simple but highly practical, which helps in the engineering implementation of the energy dissipation device, effectively solves the AC bus overvoltage problem, and improves the power transmission capacity of DC lines.

[0020] Furthermore, the conditions for allowing the energy dissipation device to be put into operation include: all phase control switches are allowed to close, all phase surge arresters are allowed to close, all circuit breakers located at the AC bus incoming positions of each phase are in the closed position, and the control device is normal; wherein, the control device is used to receive the energy dissipation device activation command issued by the polar control system and issue closing commands to each phase control switch; the conditions for the control device to be normal include: the control device self-test is normal, and the control device can communicate normally with the trigger switch controller, the protection device and the measurement and control device included in the energy dissipation device; the conditions for allowing all phase control switches to close include: all trigger switches in each phase control switch are allowed to close and all bypass switches in each phase control switch are allowed to close; the conditions for allowing trigger switches to close include: the trigger switch controller can communicate normally with its downstream communication equipment in the energy dissipation device, the capacitor voltage in the trigger switch is normal, and the trigger switch position is normal; the conditions for allowing bypass switches to close include: the bypass switch closing oil pressure is normal, the sulfur hexafluoride pressure is normal, and the bypass switch self-locking signal is invalid.

[0021] Its beneficial effects are as follows: Comprehensive testing and evaluation of control switches, surge arresters, circuit breakers, and control devices are conducted. Only when each component is fault-free is the energy dissipation device deemed ready for operation, ensuring the effectiveness of its operation. Furthermore, comprehensive testing and evaluation of bypass switches and trigger switches within the control switches are conducted. Only when both bypass switches and trigger switches are fault-free is the control switch deemed ready for closing, further ensuring the effectiveness of the energy dissipation device's operation.

[0022] Furthermore, if a closed state feedback from the trigger switch in a certain phase control switch is received within the time t0+Δt0, or a closed state feedback from the bypass switch in the same phase control switch is received within the time t1+Δt1, then the phase control switch is determined to have closed successfully; where t0 represents the maximum value of the trigger switch closing action time, Δt0 represents the set margin time, t1 represents the maximum value of the bypass switch closing action time, and Δt1 represents the set margin time.

[0023] Its beneficial effects are: considering factors such as communication delay and the operating time of the intermediate relay in the bypass switch, the required time corresponding to the control switch includes the set margin time to prevent misjudgment caused by the required time being set too short.

[0024] Furthermore, the effective activation command of the energy dissipation device means that the duty control command of any of the multi-polar control systems communicating with the energy dissipation device is the activation command of the energy dissipation device. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the single-phase energy dissipation device of the present invention;

[0026] Figure 2 This is a schematic diagram showing the connection between the control device and the polar control system in the energy dissipation device of the present invention;

[0027] Figure 3 This is a flowchart of the energy dissipation device activation control method of the present invention;

[0028] Figure 4 This is a flowchart of the single-phase energy dissipation device control process of the present invention. Detailed Implementation

[0029] This invention refines the conditions for activating the energy dissipation device. A closing command is only issued to the control switch when the received energy dissipation device activation command is valid and the activation of the energy dissipation device is permitted. The energy dissipation device is only considered to be successfully activated after receiving feedback of the closing status from all phase control switches within the required time. This ensures that the activation of the energy dissipation device is meaningful and provides a reference for the engineering design of the control logic of the energy dissipation device.

[0030] To make the objectives, technical solutions, and advantages described above clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention; that is, the described embodiments are merely some embodiments of the present invention, not all 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 claimed invention, but merely represents selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0031] Energy dissipation device example:

[0032] One embodiment of the energy dissipation device of the present invention is an AC controllable self-recovering energy dissipation device, installed on the AC busbar lead-out line of the converter station. The schematic diagram of its single-phase (taking phase A as an example) energy dissipation device is shown below. Figure 1As shown. The entire energy dissipation device includes three-phase primary equipment, a three-phase measurement system, and control and protection devices.

[0033] like Figure 1 As shown, the primary equipment for each phase includes multiple surge arrester branches located between the incoming and grounding terminals. Each surge arrester branch has one fixed surge arrester element and one controlled surge arrester element, with all fixed and controlled surge arrester elements connected in parallel. Control switches include a trigger switch (CATS) and a bypass switch (CABS). The trigger switch (CATS) and bypass switch (CABS) are connected in parallel with all controlled surge arrester elements. An incoming circuit breaker (DL) is installed at the incoming AC bus of each phase. Each phase trigger switch is configured with two redundant trigger switch controllers, each capable of independently performing signal acquisition and control functions for the trigger switch. It should be noted that the trigger switch controller is part of the primary equipment and is located in the same place as the trigger switch.

[0034] The measurement system for each phase includes a current transformer (BCT) for detecting the line current of the fixed element of the surge arrester, a current transformer (CT) for detecting the grounding current, and a voltage transformer (PT) for detecting the voltage of the controlled element of the surge arrester. All current transformers (BCT) are connected to the data acquisition unit to convert the electrical signals acquired by the current transformers (BCT) into optical signals for transmission.

[0035] The control and protection system includes two redundant control devices, three redundant protection devices, and two redundant measurement and control devices. The redundancy configuration of the control and protection devices is for reliability considerations, while the triple redundancy configuration of the protection devices is to meet the "two out of three" protection requirement. The functions of the control and protection system include: acquiring the position signal of the AC bus incoming circuit breaker; receiving the energy dissipation device activation command issued by the centralized control system; acquiring the status signals of the three-phase trigger switch (CATS) and bypass switch (CABS); controlling the closing of the three-phase trigger switch (CATS) and bypass switch (CABS); determining the closing action result of the three-phase trigger switch (CATS) and bypass switch (CABS); monitoring the internal communication status of the control and protection system; monitoring the communication status between the control and protection system and the sensor acquisition unit in the measurement system; and calculating the energy absorbed by the arrester fixing elements after the energy dissipation device is activated. The control device communicates redundantly with the polar control system, trigger switches, protection devices, and measurement and control devices. In this embodiment, the polar control system is a bipolar polar control system; similarly, the redundancy configuration of the polar control system is for reliability considerations.

[0036] When an overvoltage fault occurs in the system, such as Figure 3 and Figure 4As shown, the bipolar control system issues an energy dissipation device activation command to the energy dissipation device, and then the energy dissipation device is activated using the following method (i.e., an energy dissipation device activation control method of the present invention):

[0037] 1) The control device determines the validity of the energy dissipation device activation command. The control device performs redundant processing on the energy dissipation device activation commands issued by the polar control system, such as... Figure 2 As shown, the control device and the bipolar polarity control system communicate with each other in a cross-redundant manner. That is, the two redundant control devices are Control Device Master A and Control Device Master B, and the bipolar polarity control systems are DC System Polarity Control 1 and DC System Polarity Control System 2. Each polarity control system includes two redundant polarity control systems: DC System Polarity Control 1 (or DC System Polarity Control 2) Master A and DC System Polarity Control 1 (or DC System Polarity Control 2) Master B. Each control device is communicatively connected to each polarity control system. For a given control device, upon receiving a bipolar polarity control command, it only responds to the duty polarity control command. If the duty polarity control command of any polarity control system is an energy dissipation device activation command, then the energy dissipation device activation command is valid. It should be noted that since the energy dissipation device must be activated to reduce the system overvoltage level during any polarity overvoltage fault, the closing operation is executed when the duty polarity control command of any polarity control system is an energy dissipation device activation command.

[0038] 2) The control device determines whether the energy dissipation device is permitted to be engaged. If the trigger switch, bypass switch, and surge arrester of a certain phase are all closed, it indicates that single-phase engagement is permitted. If all three phases are allowed to be engaged, all three incoming circuit breakers are in the closed position, and the control device is functioning normally, it indicates that the energy dissipation device is permitted to be engaged; otherwise, it indicates that the energy dissipation device engagement is invalid. Specifically:

[0039] If the trigger switch controller can communicate normally with any of its downstream communication devices, the trigger switch capacitor voltage is normal, and the trigger switch position is normal, then the trigger switch closing is permitted.

[0040] If the bypass switch closing oil pressure is normal, the SF6 pressure is normal, and the bypass switch self-locking signal is invalid, then the bypass switch closing is permitted.

[0041] 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 surge arrester's energy over-limit self-locking value, it indicates that the surge arrester's self-locking signal is valid, meaning that the surge arrester's closing permission is invalid; otherwise, it indicates that the surge arrester's closing permission is valid.

[0042] If the following conditions are met: the control device's self-test is normal; 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 considered normal. Furthermore, if the redundant controller of the single-phase trigger switch communicates redundantly with the control device, and each uplink of each phase trigger switch communicates normally with the control device, then the conditions are met.

[0043] 3) If the judgment result in step 1) is that the energy dissipation device activation command is valid and the judgment result in step 2) is that the energy dissipation device activation is permitted, 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.

[0044] 4) The trigger switch and bypass switch feed back their switch status to the control device. The control device determines the action result based on the switch's operating characteristics: if the control device receives the feedback switch closed status within the required time, it determines that the control switch has successfully closed; otherwise, it determines that the control switch has failed to close. If both the single-phase trigger switch and bypass switch fail to close, then the closing of that phase has failed; if any phase fails to close, then the energy dissipation device has failed to engage.

[0045] Specifically, based on the characteristics of the trigger switch, its closing action time is less than t0ms. Considering communication delay and a certain margin, a margin time Δt0 is set (Δt0 = 5ms in this embodiment). If the control device receives feedback on the closed position status of a certain phase trigger switch within (t0 + 5)ms, it is determined that the phase trigger switch has successfully closed; otherwise, it is determined that the phase trigger switch has failed to close. Based on the characteristics of the bypass switch, its closing action time is less than t1ms. Both the bypass switch closing control circuit and the closing position feedback circuit are electrical signals. Considering the action time of the intermediate relay and a certain margin, a margin time Δt1 is set (Δt1 = 60ms in this embodiment). If the control device receives feedback on the closed position status of a certain phase bypass switch within (t1 + 60)ms, it is determined that the phase bypass switch has successfully closed; otherwise, it is determined that the phase bypass switch has failed to close.

[0046] 5) The control device feeds back the status of the energy dissipation device to the polar control system, including the status of successful activation and the status of failed activation (i.e., fault status).

[0047] It should be noted that both control devices in the energy dissipation device in this embodiment execute the closing control method, and the control function can be completed as long as either control device is functioning normally.

[0048] In summary, the above methods enable functions such as polar control activation command processing, energy dissipation device activation condition judgment, automatic closing of trigger switches and bypass switches, and energy dissipation device activation status judgment. This facilitates the engineering implementation of energy dissipation devices, effectively solves AC bus overvoltage problems, and improves the power transmission capacity of DC lines.

[0049] Example of energy dissipation device activation control method:

[0050] The present invention provides a method for controlling the activation of an energy dissipation device. This method enables functions such as processing activation commands, determining activation conditions for the energy dissipation device, automatically closing trigger switches and bypass switches, and determining the activation status of the energy dissipation device. Specifically, it includes:

[0051] 1) When the energy dissipation device is allowed to be put into operation (all phase control switches are allowed to be closed, all phase surge arresters are allowed to be closed, all circuit breakers located at the AC bus incoming positions of each phase are in the closed position, and the control device is normal) and the received energy dissipation device putting into operation command is valid (the duty control command of any pole control system in the multi-pole pole control system communicating with the energy dissipation device is the energy dissipation device putting into operation command), a closing command is issued to each phase control switch in the energy dissipation device to make the control switch perform the closing action;

[0052] 2) If the closed state feedback from the trigger switch in a certain phase control switch is received within the time t0+Δt0, or the closed state feedback from the bypass switch in the same phase control switch is received within the time t1+Δt1, it indicates that the closed state feedback from the phase control switch has been received; if the closed state feedback from all phase control switches is received, it is determined that all phase control switches have been successfully closed, and the energy dissipation device is put into operation.

[0053] The specific implementation process of this method has been described in detail in the energy dissipation device embodiment, and will not be repeated in this energy dissipation device control method embodiment.

[0054] Specific implementation methods have been 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 those skilled in the art, designing various modified models, formulas, and parameters based on the teachings of the present invention does not require creative effort. Changes, modifications, substitutions, and variations made to the implementation methods without departing from the principles and spirit of the present invention still fall within the protection scope of the present invention.

Claims

1. A method for controlling the activation of an energy dissipation device, characterized in that, include: 1) When the energy dissipation device is allowed to be put into operation and the received energy dissipation device operation command is valid, a closing command is sent to each phase control switch in the energy dissipation device to make the control switch perform the closing action. The energy dissipation device is allowed to be put into operation when the following conditions are met: the trigger switches and bypass switches in each phase control switch are closed and allowed; the surge arresters in each phase are closed and allowed; the circuit breakers located at the AC bus incoming positions in each phase are in the closed position and the control device is normal. The control device is used to receive the energy dissipation device activation command and send closing commands to each phase control switch. The conditions for the control device to function normally include: the control device self-test is normal, and the control device and other devices in the energy dissipation device, except for its uplink communication equipment, can communicate normally. The conditions for allowing the trigger switch to close include: normal communication between the trigger switch controller and its downstream communication equipment in the energy dissipation device; normal capacitor voltages in the trigger switch; and normal trigger switch position. The conditions for allowing the bypass switch to close include: normal bypass switch closing oil pressure; normal sulfur hexafluoride pressure; and invalid bypass switch self-locking signal. The conditions for allowing all surge arresters in a certain phase to close include: the energy absorbed by the energy dissipation device in that phase is less than or equal to the energy over-limit self-locking value of the surge arrester in that phase. 2) When the closed status feedback from all phase control switches is received within the required time, it is determined that all phase control switches have been successfully closed, and the energy dissipation device is put into operation.

2. The energy dissipation device activation control method according to claim 1, characterized in that, If a closed state feedback from the trigger switch in a certain phase control switch is received within the time interval t0+Δt0, or a closed state feedback from the bypass switch in the same phase control switch is received within the time interval t1+Δt1, it indicates that a closed state feedback from the phase control switch has been received; where t0 represents the maximum value of the trigger switch closing action time, Δt0 represents the set trigger switch margin time, t1 represents the maximum value of the bypass switch closing action time, and Δt1 represents the set bypass switch margin time.

3. The energy dissipation device activation control method according to claim 2, characterized in that, △t0=5ms, △t1=60ms.

4. The energy dissipation device activation control method according to any one of claims 1 to 3, characterized in that, A valid energy dissipation device activation command means that the duty control command of any of the multi-polar control systems communicating with the energy dissipation device is an energy dissipation device activation command.

5. The energy dissipation device activation control method according to claim 1, characterized in that, The energy absorbed by the energy dissipation device each time it is put into operation is calculated based on the current collected by the current transformer.

6. An energy dissipation device, comprising a control and protection device and three-phase primary equipment; the control and protection device includes a control unit for communicating with a polar control system; each phase of the primary equipment includes multiple surge arrester branches disposed between the incoming line terminal and the grounding terminal, each surge arrester branch being provided with a surge arrester fixed element and a surge arrester controlled element, all surge arrester fixed elements being connected in parallel, all surge arrester controlled elements being connected in parallel, and a control switch being connected in parallel with all surge arrester controlled elements, characterized in that, The control device is used to activate the energy dissipation device using the energy dissipation device activation control method described in claim 1 when the energy dissipation device needs to be activated.

7. The energy dissipation device according to claim 6, characterized in that, If a closed state is received from the trigger switch in a phase control switch within the time interval t0+Δt0, or a closed state is received from the bypass switch in the same phase control switch within the time interval t1+Δt1, then the phase control switch is determined to have closed successfully. Here, t0 represents the maximum value of the trigger switch closing action time, Δt0 represents the set margin time, t1 represents the maximum value of the bypass switch closing action time, and Δt1 represents the set margin time.

8. The energy dissipation device according to claim 7, characterized in that, △t0=5ms, △t1=60ms.

9. The energy dissipation device according to any one of claims 6 to 8, characterized in that, A valid energy dissipation device activation command means that the duty control command of any of the multi-polar control systems communicating with the energy dissipation device is an energy dissipation device activation command.

10. The energy dissipation device according to claim 7, characterized in that, The energy absorbed by the energy dissipation device each time it is put into operation is calculated based on the current collected by the current transformer.

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