基于关联变电站信息的断路器失灵保护技术研究
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摘要
阐述了目前断路器失灵保护的基本原理,分析了影响失灵保护动作延时的主要因素。提出了一种基于关联变电站信息的断路器失灵保护及死区保护技术方案。该方案利用与失灵断路器相邻的非故障区域断路器CT构成电流差动保护判据,满足动作条件后跳开与失灵断路器相邻的断路器,实现故障的清除。该方案不受CT拖尾和饱和的影响,大幅缩短了失灵保护动作时间,并且可实现免整定。工程实施采用主子机方式的可扩展架构设计,工程配置灵活。同时保护采样同步不依赖外部对时信号,可靠性高,易于实现,有广泛推广的现实意义。
This paper first describes the basic principle of breaker failure protection, and analyzes the main factors affecting the delay of breaker failure protection. A technical scheme of breaker failure protection and dead-zone protection based on associated substation information is proposed. This scheme forms a current differential protection criterion by utilizing the non-faulty area circuit breaker CT which is adjacent to failure breaker. After the criteria of incomplete current differential protection are satisfied, the related circuit breaker is tripped to isolate the fault. This scheme is not affected by CT tailing and saturation, which greatly shortens the delay of failure protection and realizes the free protective setting. The implementation of the project adopts an expandable architecture designed with master slave mode, which is flexible in engineering configuration. Meanwhile, the protection sampling synchronization does not rely on external timing signals. This scheme has high reliability and is easy to carry out, so it has the practical significance of widespread promotion.
This paper first describes the basic principle of breaker failure protection, and analyzes the main factors affecting the delay of breaker failure protection. A technical scheme of breaker failure protection and dead-zone protection based on associated substation information is proposed. This scheme forms a current differential protection criterion by utilizing the non-faulty area circuit breaker CT which is adjacent to failure breaker. After the criteria of incomplete current differential protection are satisfied, the related circuit breaker is tripped to isolate the fault. This scheme is not affected by CT tailing and saturation, which greatly shortens the delay of failure protection and realizes the free protective setting. The implementation of the project adopts an expandable architecture designed with master slave mode, which is flexible in engineering configuration. Meanwhile, the protection sampling synchronization does not rely on external timing signals. This scheme has high reliability and is easy to carry out, so it has the practical significance of widespread promotion.
引文
[1]余江,周红阳,陈朝晖,等.计及系统稳定需求的500 k V断路器失灵及死区保护优化[J].电力系统自动化,2015,39(2):142-146.YU Jiang,ZHOU Hongyang,CHEN Zhaohui,et al.Improvement of 500 kV breaker failure and dead-zone prevention based on requirement on stability of grid[J].Automation of Electric Power Systems,2015,39(2):142-146.
[2]刘建勋,陆榛,付俊波,等.抵御直流连续换相失败的同步调相机配置研究[J].智慧电力,2017,45(12):22-27.LIU Jianxun,LU Zhen,FU Junbo,et al.Research on synchronous condenser configuration for resisting continuous commutation failure in HVDC[J].Smart Power,2017,45(12):22-27.
[3]夏成军,杨仲超,周保荣,等.考虑负荷模型的多回直流同时换相失败分析[J].电力系统保护与控制,2015,43(9):76-81.XIA Chengjun,YANG Zhongchao,ZHOU Baorong,et al.Analysis of commutation failure in multi-infeed HVDCsystem under different load models[J].Power System Protection and Control,2015,43(9):76-81.
[4]陈刚,丁理杰,李旻,等.异步联网后西南电网安全稳定特性分析[J].电力系统保护与控制,2018,46(7):76-82.CHEN Gang,DING Lijie,LI Min,et al.Stability characteristics of southwest China power grid after asynchronous interconnection[J].Power System Protection and Control,2018,46(7):76-82.
[5]刘颖,戴栋,汪娟娟,等.基于逆变侧定电压控制的HVDC系统稳态和暂态响应特性研究[J].电力系统保护与控制,2017,45(24):1-8.LIU Ying,DAI Dong,WANG Juanjuan,et al.Transient and steady responses in HVDC system based on constant voltage control at inverter side[J].Power System Protection and Control,2017,45(24):1-8.
[6]李兆伟,翟海保,刘福锁,等.多馈入交直流混联受端电网直流接入能力研究评述[J].电力系统保护与控制,2016,44(8):142-148.LI Zhaowei,ZHAI Haibao,LIU Fusuo,et al.DC access capability study for multi-infeed HVDC power transmission system[J].Power System Protection and Control,2016,44(8):142-148.
[7]王玲,文俊,司瑞华,等.UHVDC分极分层接入方式及其运行特性[J].电工技术学报,2018,33(4):730-738.WANG Ling,WEN Jun,SI Ruihua,et al.The connection mode and operation characteristics of UHVDC with hierarchical connection by pole[J].Transactions of China Electrotechnical Society,2018,33(4):730-738.
[8]陈波,王永庆.电网安全控制与保护技术现状分析及发展趋势研究[J].智慧电力,2017,45(11):67-71.CHEN Bo,WANG Yongqing.Current situation analysis of power grid security control and protection technology and its development trend[J].Smart Power,2017,45(11):67-71.
[9]张尧,李玉平,陈实.分布式就地化变压器保护定值自整定的实现方案研究[J].智慧电力,2017,45(10):72-76.ZHANG Yao,LI Yuping,CHEN Shi.Research on distributed on-site transformer protection self-setting solution[J].Smart Power,2017,45(10):72-76.
[10]张新昌,张项安.层次化保护控制系统及其网络通信技术研究[J].电力系统保护与控制,2014,42(19):129-133.ZHANG Xinchang,ZHANG Xiangan.Research of hierarchical protection&control system and its communication technology[J].Power System Protection and Control,2014,42(19):129-133.
[11]马燕峰,张佳怡,蒋云涛,等.计及广域信号多时滞影响的电力系统附加鲁棒阻尼控制[J].电工技术学报,2017,32(6):58-66.MA Yanfeng,ZHANG Jiayi,JIANG Yuntao,et al.Additional robust damping control of wide-area power system with multiple time delays considered[J].Transactions of China Electrotechnical Society,2017,32(6):58-66.
[12]姜涛,贾宏杰,李国庆,等.基于广域量测信息相关性的电力系统同调辨识[J].电工技术学报,2017,32(1):1-11.JIANG Tao,JIA Hongjie,LI Guoqing,et al.Cross-correlation coefficient-based coherency identification in bulk power system using wide-area measurements[J].Transactions of China Electrotechnical Society,2017,32(1):1-11.
[13]李俊刚,孟乐,张爱民,等.基于相量集合的站域差动保护研究[J].电力系统保护与控制,2015,43(6):93-97.LI Jungang,MENG Le,ZHANG Aimin,et al.Research on substation differential protection based on phase set[J].Power System Protection and Control,2015,43(6):93-97.
[14]于游,邱金辉,吴颖超,等.基于电流量的断路器失灵保护闭锁新原理[J].电力系统自动化,2014,38(23):114-118.YU You,QIU Jinhui,WU Yingchao,et al.A novel blocking method of circuit breaker failure protection based on current[J].Automation of Electric Power Systems,2014,38(23):114-118.
[15]李倍,和敬涵,YIP T.一种基于相位相关电流差动的站域后备保护算法[J].电力系统保护与控制,2014,42(24):1-5.LI Bei,HE Jinghan,YIP T.A study of substation-area backup protection based on phase related current differential[J].Power System Protection and Control,2014,42(24):1-5.
[16]丁书文.断路器失灵保护若干问题分析[J].电力系统自动化,2006,30(3):89-91.DING Shuwen.Analysis on some problems of breaker failure protection[J].Automation of Electric Power Systems,2006,30(3):89-91.
[17]姜自强,刘建勇.南阳特高压断路器失灵保护的研究[J].电力系统保护与控制,2015,43(12):117-122.JIANG Ziqiang,LIU Jianyong.Study on Nanyang substation of UHV circuit breaker failure protection[J].Power System Protection and Control,2015,43(12):117-122.
[18]余越,郭雅蓉,李岩军,等.基于CT拖尾电流截断算法的失灵保护延时优化研究[J].电网技术,2017,41(1):285-290.YU Yue,GUO Yarong,LI Yanjun,et al.Research on delay optimization of breaker failure protection based on the CT current tail truncation algorithm[J].Power System Technology,2017,41(1):285-290.
[19]万洛飞,李志坚,宋斌,等.一种基于拖尾电流识别的失灵保护实现[J].电力系统保护与控制,2017,45(11):89-94.WAN Luofei,LI Zhijian,SONG Bin,et al.Implement method of breaker failure protection based on subsidence current blocking[J].Power System Protection and Control,2017,45(11):89-94.
[20]国家电网继电保护整定计算技术规范:Q/GDW422-2010[S].北京:国家电网公司,2010.
[2]刘建勋,陆榛,付俊波,等.抵御直流连续换相失败的同步调相机配置研究[J].智慧电力,2017,45(12):22-27.LIU Jianxun,LU Zhen,FU Junbo,et al.Research on synchronous condenser configuration for resisting continuous commutation failure in HVDC[J].Smart Power,2017,45(12):22-27.
[3]夏成军,杨仲超,周保荣,等.考虑负荷模型的多回直流同时换相失败分析[J].电力系统保护与控制,2015,43(9):76-81.XIA Chengjun,YANG Zhongchao,ZHOU Baorong,et al.Analysis of commutation failure in multi-infeed HVDCsystem under different load models[J].Power System Protection and Control,2015,43(9):76-81.
[4]陈刚,丁理杰,李旻,等.异步联网后西南电网安全稳定特性分析[J].电力系统保护与控制,2018,46(7):76-82.CHEN Gang,DING Lijie,LI Min,et al.Stability characteristics of southwest China power grid after asynchronous interconnection[J].Power System Protection and Control,2018,46(7):76-82.
[5]刘颖,戴栋,汪娟娟,等.基于逆变侧定电压控制的HVDC系统稳态和暂态响应特性研究[J].电力系统保护与控制,2017,45(24):1-8.LIU Ying,DAI Dong,WANG Juanjuan,et al.Transient and steady responses in HVDC system based on constant voltage control at inverter side[J].Power System Protection and Control,2017,45(24):1-8.
[6]李兆伟,翟海保,刘福锁,等.多馈入交直流混联受端电网直流接入能力研究评述[J].电力系统保护与控制,2016,44(8):142-148.LI Zhaowei,ZHAI Haibao,LIU Fusuo,et al.DC access capability study for multi-infeed HVDC power transmission system[J].Power System Protection and Control,2016,44(8):142-148.
[7]王玲,文俊,司瑞华,等.UHVDC分极分层接入方式及其运行特性[J].电工技术学报,2018,33(4):730-738.WANG Ling,WEN Jun,SI Ruihua,et al.The connection mode and operation characteristics of UHVDC with hierarchical connection by pole[J].Transactions of China Electrotechnical Society,2018,33(4):730-738.
[8]陈波,王永庆.电网安全控制与保护技术现状分析及发展趋势研究[J].智慧电力,2017,45(11):67-71.CHEN Bo,WANG Yongqing.Current situation analysis of power grid security control and protection technology and its development trend[J].Smart Power,2017,45(11):67-71.
[9]张尧,李玉平,陈实.分布式就地化变压器保护定值自整定的实现方案研究[J].智慧电力,2017,45(10):72-76.ZHANG Yao,LI Yuping,CHEN Shi.Research on distributed on-site transformer protection self-setting solution[J].Smart Power,2017,45(10):72-76.
[10]张新昌,张项安.层次化保护控制系统及其网络通信技术研究[J].电力系统保护与控制,2014,42(19):129-133.ZHANG Xinchang,ZHANG Xiangan.Research of hierarchical protection&control system and its communication technology[J].Power System Protection and Control,2014,42(19):129-133.
[11]马燕峰,张佳怡,蒋云涛,等.计及广域信号多时滞影响的电力系统附加鲁棒阻尼控制[J].电工技术学报,2017,32(6):58-66.MA Yanfeng,ZHANG Jiayi,JIANG Yuntao,et al.Additional robust damping control of wide-area power system with multiple time delays considered[J].Transactions of China Electrotechnical Society,2017,32(6):58-66.
[12]姜涛,贾宏杰,李国庆,等.基于广域量测信息相关性的电力系统同调辨识[J].电工技术学报,2017,32(1):1-11.JIANG Tao,JIA Hongjie,LI Guoqing,et al.Cross-correlation coefficient-based coherency identification in bulk power system using wide-area measurements[J].Transactions of China Electrotechnical Society,2017,32(1):1-11.
[13]李俊刚,孟乐,张爱民,等.基于相量集合的站域差动保护研究[J].电力系统保护与控制,2015,43(6):93-97.LI Jungang,MENG Le,ZHANG Aimin,et al.Research on substation differential protection based on phase set[J].Power System Protection and Control,2015,43(6):93-97.
[14]于游,邱金辉,吴颖超,等.基于电流量的断路器失灵保护闭锁新原理[J].电力系统自动化,2014,38(23):114-118.YU You,QIU Jinhui,WU Yingchao,et al.A novel blocking method of circuit breaker failure protection based on current[J].Automation of Electric Power Systems,2014,38(23):114-118.
[15]李倍,和敬涵,YIP T.一种基于相位相关电流差动的站域后备保护算法[J].电力系统保护与控制,2014,42(24):1-5.LI Bei,HE Jinghan,YIP T.A study of substation-area backup protection based on phase related current differential[J].Power System Protection and Control,2014,42(24):1-5.
[16]丁书文.断路器失灵保护若干问题分析[J].电力系统自动化,2006,30(3):89-91.DING Shuwen.Analysis on some problems of breaker failure protection[J].Automation of Electric Power Systems,2006,30(3):89-91.
[17]姜自强,刘建勇.南阳特高压断路器失灵保护的研究[J].电力系统保护与控制,2015,43(12):117-122.JIANG Ziqiang,LIU Jianyong.Study on Nanyang substation of UHV circuit breaker failure protection[J].Power System Protection and Control,2015,43(12):117-122.
[18]余越,郭雅蓉,李岩军,等.基于CT拖尾电流截断算法的失灵保护延时优化研究[J].电网技术,2017,41(1):285-290.YU Yue,GUO Yarong,LI Yanjun,et al.Research on delay optimization of breaker failure protection based on the CT current tail truncation algorithm[J].Power System Technology,2017,41(1):285-290.
[19]万洛飞,李志坚,宋斌,等.一种基于拖尾电流识别的失灵保护实现[J].电力系统保护与控制,2017,45(11):89-94.WAN Luofei,LI Zhijian,SONG Bin,et al.Implement method of breaker failure protection based on subsidence current blocking[J].Power System Protection and Control,2017,45(11):89-94.
[20]国家电网继电保护整定计算技术规范:Q/GDW422-2010[S].北京:国家电网公司,2010.