配电网单相接地故障残余电流转移消弧方法
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摘要
根据消弧线圈和故障转移灭弧装置的优缺点,提出了一种残余电流转移的消弧方法。该方法首先利用消弧线圈将故障点电流补偿到较小数值,再投入故障转移装置转移故障点的残余电流,使电弧可靠熄灭。为了避免转移装置错误投入带来负面影响,采用两级开关结构,并用限流电阻对第一级合闸电流进行限制。通过检测限流电阻的电压或电流,可实现转移装置投入正确性以及电弧是否熄灭的判别,为故障转移装置的投退提供了可靠依据。仿真结果表明,该方法能够解决消弧线圈残流过大的问题,同时也能够避免故障转移装置错误投入带来的风险。
According to the merits and drawbacks of the arc-suppression coil and the fault transfer device,an arc suppression method based on transferring residual current is proposed in this paper. The fault point current is compensated to a smaller value by arc suppression coil,and then,the residual current of the fault point is transferred by the fault transfer device,so that the arc is reliably extinguished. In order to reduce the negative impact of the false action of the transfer device,a two-stage switch structure is adopted and the current-limiting resistor is used to limit the current of the first stage.By detecting the voltage or current of the current-limiting resistor,it can distinguish the correctness of the transfer device action and whether the arc is extinguished,which provides a reliable basis for the control of the fault transfer device. The simulation results show that this method can reduce the residual current of fault point and can also avoid the risk of false action by the residual current transfer device.
According to the merits and drawbacks of the arc-suppression coil and the fault transfer device,an arc suppression method based on transferring residual current is proposed in this paper. The fault point current is compensated to a smaller value by arc suppression coil,and then,the residual current of the fault point is transferred by the fault transfer device,so that the arc is reliably extinguished. In order to reduce the negative impact of the false action of the transfer device,a two-stage switch structure is adopted and the current-limiting resistor is used to limit the current of the first stage.By detecting the voltage or current of the current-limiting resistor,it can distinguish the correctness of the transfer device action and whether the arc is extinguished,which provides a reliable basis for the control of the fault transfer device. The simulation results show that this method can reduce the residual current of fault point and can also avoid the risk of false action by the residual current transfer device.
引文
[1]艾绍贵,李秀广,黎炜,等.配电网快速开关型消除弧光接地故障技术研究[J].高压电器,2017,(3):178-184.Ai Shaogui,Li Xiuguang,Li Wei,et al. Arc Suppression Technology Based on Fast Switch for Distribution Network[J]. High Voltage Apparatus,2015,35(11):67-74.
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[3]李晓波,王崇林.零残流消弧线圈综述[J].电力自动化设备,2011,(6):116-121.Li Xiaobo,Wang Chonglin. Survey of zero-residual-current arc supperssion coil[J]. Electric Power Automation Equipment,2011,(6):116-121.
[4]余文辉,李健,陈祖勋.配电网接地故障电压消弧新方法[J].电力科学与技术学报,2012,(1):64-69.Yu Wenhui,Li Jian,Chen Zuxun. A novel voltage arc-suppression method for grounding faults in distribution networks[J]. Journal of Electric Power Science and Technology,2012,(1):64-69.
[5]要换年.电力系统谐振接地[M].第二版.北京:中国电力出版社,2000.
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[7]公茂法,葛卉婷,林煜清,等. 10kV消弧线圈补偿系统的应用研究[J].电测与仪表,2015,52(17):84-87.Gong Maofa,Ge Huiting,Lin Yuqing,et al. Application research of arc suppression coil compensation system in 10kV[J]. Electrical Measurement&Instrumentation,2015,52(17):84-87.
[8]曾祥君,王媛媛,李健,等.基于配电网柔性接地控制的故障消弧与馈线保护新原理[J].中国电机工程学报,2012,(16):137-143.Zeng Xiangjun,Wang Yuanyuan,Li Jian,et al. Novel Principle of Faults Arc Extinguishing&Feeder Protection Based on Flexible Grounding Control for Distribution Networks[J]. Proceedings of the CSEE,2012,(16):137-143.
[9]李新泉,齐郑,杨以涵.消弧线圈与接地故障转移装置配合使用的消弧方法[J].电力系统自动化,2008,(19):71-75.Li Xinquan,Qi Zheng,Yang Yihan. Arc-suppression Method for Coordinated Using of Arc-extinguish Coil with Grounded-Fault Transfer Device[J]. Automation of Electic Power Systems,2008,(19):71-75.
[10]冯建勤,冯巧玲,陈志武.消弧柜的配置与选用[J].高压电器,2009,(2):117-119.Feng Jianqin,Feng Qiaoling,Chen Zhiwu. Configuration Selection and Application of Arc-overvoltage Suppressors[J]. High Voltage Apparatus,2009,(2):117-119.
[11]刘虹,尹忠东,陈柏超,等.新型可控自动消弧成套装置的应用研究[J].电力系统自动化,1998,(2):9-12.Liu Hong,Yin Zhongdong,Chen Baichao,et al. Application Research on a New Type Automatic Controlijable Arc Exti-Nguishing Apparatusl[J]. Automation of Electric Power Systems,1998,(2):9-12.
[2]郭谋发,游建章,林先辉,等.适应线路参数及负载变化的配电网柔性优化消弧方法[J].电力系统自动化,2017,(8):138-145.Guo Moufa,You Jianzhang,Lin Xianhui,et al. Flexible Arc-suppression Optimization Method for Distribution Network Adaptable to Variation of Line Parameters and Load[J]. Automation of Electric Power Systems,2017,(8):138-145.
[3]李晓波,王崇林.零残流消弧线圈综述[J].电力自动化设备,2011,(6):116-121.Li Xiaobo,Wang Chonglin. Survey of zero-residual-current arc supperssion coil[J]. Electric Power Automation Equipment,2011,(6):116-121.
[4]余文辉,李健,陈祖勋.配电网接地故障电压消弧新方法[J].电力科学与技术学报,2012,(1):64-69.Yu Wenhui,Li Jian,Chen Zuxun. A novel voltage arc-suppression method for grounding faults in distribution networks[J]. Journal of Electric Power Science and Technology,2012,(1):64-69.
[5]要换年.电力系统谐振接地[M].第二版.北京:中国电力出版社,2000.
[6]孙成勋,桑振华,杨晓瑛,等.基于定相增量法的消弧线圈新型调谐方法[J].电测与仪表,2015,52(10):105-108.Sun Chengxun,Sang Zhenhua,Yang Xiaoying,et al. A new tuing method of the arc-suppression coil based on the phasing increments[J].Electrical Measurement&Instrumentation,2015,52(10):105-108.
[7]公茂法,葛卉婷,林煜清,等. 10kV消弧线圈补偿系统的应用研究[J].电测与仪表,2015,52(17):84-87.Gong Maofa,Ge Huiting,Lin Yuqing,et al. Application research of arc suppression coil compensation system in 10kV[J]. Electrical Measurement&Instrumentation,2015,52(17):84-87.
[8]曾祥君,王媛媛,李健,等.基于配电网柔性接地控制的故障消弧与馈线保护新原理[J].中国电机工程学报,2012,(16):137-143.Zeng Xiangjun,Wang Yuanyuan,Li Jian,et al. Novel Principle of Faults Arc Extinguishing&Feeder Protection Based on Flexible Grounding Control for Distribution Networks[J]. Proceedings of the CSEE,2012,(16):137-143.
[9]李新泉,齐郑,杨以涵.消弧线圈与接地故障转移装置配合使用的消弧方法[J].电力系统自动化,2008,(19):71-75.Li Xinquan,Qi Zheng,Yang Yihan. Arc-suppression Method for Coordinated Using of Arc-extinguish Coil with Grounded-Fault Transfer Device[J]. Automation of Electic Power Systems,2008,(19):71-75.
[10]冯建勤,冯巧玲,陈志武.消弧柜的配置与选用[J].高压电器,2009,(2):117-119.Feng Jianqin,Feng Qiaoling,Chen Zhiwu. Configuration Selection and Application of Arc-overvoltage Suppressors[J]. High Voltage Apparatus,2009,(2):117-119.
[11]刘虹,尹忠东,陈柏超,等.新型可控自动消弧成套装置的应用研究[J].电力系统自动化,1998,(2):9-12.Liu Hong,Yin Zhongdong,Chen Baichao,et al. Application Research on a New Type Automatic Controlijable Arc Exti-Nguishing Apparatusl[J]. Automation of Electric Power Systems,1998,(2):9-12.
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