WO2024077658A1 - Appareil de dissipation d'énergie et son procédé de commande de commutation - Google Patents

Appareil de dissipation d'énergie et son procédé de commande de commutation Download PDF

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Publication number
WO2024077658A1
WO2024077658A1 PCT/CN2022/126929 CN2022126929W WO2024077658A1 WO 2024077658 A1 WO2024077658 A1 WO 2024077658A1 CN 2022126929 W CN2022126929 W CN 2022126929W WO 2024077658 A1 WO2024077658 A1 WO 2024077658A1
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WO
WIPO (PCT)
Prior art keywords
energy dissipation
dissipation device
control
switch
phase
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Application number
PCT/CN2022/126929
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English (en)
Chinese (zh)
Inventor
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
胡剑生
Original Assignee
许继集团有限公司
许继电气股份有限公司
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Application filed by 许继集团有限公司, 许继电气股份有限公司 filed Critical 许继集团有限公司
Publication of WO2024077658A1 publication Critical patent/WO2024077658A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]

Definitions

  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the energy dissipation device may have absorbed energy and reached its energy over-limit self-locking value.
  • the energy dissipation device status 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.
  • 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.
  • 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.
  • 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 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.
  • 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.
  • 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.
  • 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.
  • 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
  • ⁇ 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.
  • 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
  • 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.
  • 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
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • FIG1 is a schematic diagram of a single-phase energy dissipation device of the present invention.
  • FIG. 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
  • FIG. 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.
  • 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.
  • 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.
  • 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
  • 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.
  • the pole control system is a bipolar pole control system.
  • the redundant configuration of the pole control system is based on reliability considerations.
  • 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):
  • 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.
  • 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.
  • the bipolar pole control instruction when receiving the bipolar pole control instruction, it only responds to the duty pole control instruction.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • step 1) 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.
  • 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.
  • the trigger switch its closing action time is less than t 0 ms.
  • 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.
  • 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).
  • 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.
  • 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.
  • 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:

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Abstract

Appareil de dissipation d'énergie et procédé de commande de commutation associé, qui appartiennent au domaine technique des appareils de dissipation d'énergie. Le procédé consiste à : lorsqu'un appareil de dissipation d'énergie est autorisé à être commuté et qu'une instruction de commutation d'appareil de dissipation d'énergie reçue est valide, émettre une instruction de fermeture pour commander des commutateurs de toutes les phases dans l'appareil de dissipation d'énergie, de telle sorte que les commutateurs de commande exécutent une action de fermeture, l'appareil de dissipation d'énergie pouvant être commuté indiquant que l'appareil de dissipation d'énergie satisfait une condition de commutation ; et lorsque des états de position fermée renvoyés par les commutateurs de commande de toutes les phases sont reçus dans un temps requis, déterminer que les commutateurs de commande de toutes les phases sont fermés avec succès, achevant ainsi la commutation de l'appareil de dissipation d'énergie. L'ensemble du procédé a une logique simple, mais est très pratique ; facilite la mise en œuvre d'ingénierie d'un appareil de dissipation d'énergie ; résout efficacement le problème de surtension d'un bus à courant alternatif ; et améliore la capacité de distribution d'énergie d'une ligne à courant continu.
PCT/CN2022/126929 2022-10-14 2022-10-24 Appareil de dissipation d'énergie et son procédé de commande de commutation WO2024077658A1 (fr)

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CN202211262226.XA CN115622013A (zh) 2022-10-14 2022-10-14 一种消能装置及其投入控制方法
CN202211262226.X 2022-10-14

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CN116106619B (zh) * 2023-04-10 2023-06-16 国网江苏省电力有限公司电力科学研究院 一种针对输电系统消能设备的检测装置及其检测方法

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JPH03265424A (ja) * 1990-03-14 1991-11-26 Toshiba Corp 過電圧抑制装置
CN108448534A (zh) * 2018-04-24 2018-08-24 南京南瑞继保电气有限公司 一种可控避雷器的控制方法和系统
CN108599126A (zh) * 2018-05-18 2018-09-28 中国电力科学研究院有限公司 一种特高压交流开关型可控避雷器的控制方法及系统
CN110932245A (zh) * 2019-12-06 2020-03-27 全球能源互联网研究院有限公司 一种混合式直流断路器、控制保护装置及方法
CN114597904A (zh) * 2022-03-01 2022-06-07 全球能源互联网研究院有限公司 一种交流系统可控消能装置及其应用方法
CN115085184A (zh) * 2022-05-27 2022-09-20 许继集团有限公司 一种可控自恢复消能装置的能量越限保护方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03265424A (ja) * 1990-03-14 1991-11-26 Toshiba Corp 過電圧抑制装置
CN108448534A (zh) * 2018-04-24 2018-08-24 南京南瑞继保电气有限公司 一种可控避雷器的控制方法和系统
CN108599126A (zh) * 2018-05-18 2018-09-28 中国电力科学研究院有限公司 一种特高压交流开关型可控避雷器的控制方法及系统
CN110932245A (zh) * 2019-12-06 2020-03-27 全球能源互联网研究院有限公司 一种混合式直流断路器、控制保护装置及方法
CN114597904A (zh) * 2022-03-01 2022-06-07 全球能源互联网研究院有限公司 一种交流系统可控消能装置及其应用方法
CN115085184A (zh) * 2022-05-27 2022-09-20 许继集团有限公司 一种可控自恢复消能装置的能量越限保护方法

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