基于双端量的半波长交流输电线路故障选相方法
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摘要
半波长交流输电线路电压等级高,故障后需要选相跳闸。但是半波长输电线路独特的电气特征使得传统的故障选相方法不再适用。文中提出了一种基于双端电气量的半波长交流输电线路故障选相方法。将两端相间电压、相间电流进行组合变换,换算到短路点正负序短路电流,从而判断故障相。基于电磁暂态仿真软件PSCAD搭建特高压半波长输电线路仿真模型。仿真结果表明,该故障选相方法不受故障位置、过渡电阻、弱馈等因素的影响,在半波长交流输电线路发生短路故障时,能快速正确地实现故障选相。
Half-wavelength AC transmission line(HWACT)is a high-voltage transmission line.So,it needs to correctly choose the fault phases after short circuit occurred in HWACT.Due to its unique electrical characteristics,the traditional phase selection element no longer applies.This paper proposes a scheme of fault phase selection in HWACT based on two-terminal electrical quantities.Two-terminal line voltage and two-terminal line current can be converted into positive and negative sequence of short circuit current,and then it can correctly choose the fault phases.The fault phase selection scheme is not affected by fault location,fault resistance and weak-infeed line.PSCAD simulation shows that the scheme can select the fault phase selection quickly and correctly.
Half-wavelength AC transmission line(HWACT)is a high-voltage transmission line.So,it needs to correctly choose the fault phases after short circuit occurred in HWACT.Due to its unique electrical characteristics,the traditional phase selection element no longer applies.This paper proposes a scheme of fault phase selection in HWACT based on two-terminal electrical quantities.Two-terminal line voltage and two-terminal line current can be converted into positive and negative sequence of short circuit current,and then it can correctly choose the fault phases.The fault phase selection scheme is not affected by fault location,fault resistance and weak-infeed line.PSCAD simulation shows that the scheme can select the fault phase selection quickly and correctly.
引文
[1]王冠,吕鑫昌,孙秋芹,等.半波长交流输电技术的研究现状与展望[J].电力系统自动化,2010,34(16):13-18.WANG Guan,LYU Xinchang,SUN Qiuqin,et al. Ststus quo and prospects of half-wavelength transmission technology[J]. Automation of Electric Power Systems,2010,34(16):13-18.
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[4]秦晓辉,张志强,徐征雄,等.基于准稳态模型的特高压半波长交流输电系统稳态特征及暂态稳定研究[J].中国电机工程学报,2011,31(31):66-76.QIN Xiaohui,ZHANG Zhiqiang,XU Zhengxiong,et al.Study on the sready state characteristic and transient stability of UHV AC half-wave-length transmission system based on quasi-steady model[J]. Proceesings of the CSEE,2011,31(31):66-76.
[5]娄颖,周沛洪,修木洪,等.特高压半波长交流输电线路电磁暂态仿真[J].高电压技术,2012,38(6):1459-1465.LOU Ying,ZHOU Peihong,XIU Muhong,et al. Electromagnetic transient simulation of UHV half wavelength AC transmission line[J]. High Voltage Engineering,2012,38(6):1459-1465.
[6]王玲桃,崔翔.特高压半波长交流输电线路稳态特性研究[J].电网技术,2011,35(9):7-12.WANG Lingtao,CUI Xiang. Research on steady-state operation characteristics of UHV half-wavelength AC power transmission line[J]. Power System Technology,2011,35(9):7-12.
[7] PORTELA C,TAVARES M C. Modeling simulation and optimization of transmission lines[C]//Applicability and Limitations of Some Used Procedures. Recife,Brazil:IEEE,2002:1-38.
[8] SOKOLOV N I,SOKOLOVA R N. The feasibility of using half-wave power transmission lines at higer frequencies[J].Electrical Technology Russia,1999(1):66-84.
[9] DIAS R,SANTO G,AREDES M. Analysis of a series tap for half-wavelength transmission lines using active filterss[C]//IEEE 36th Power Electronics Specialists Conference. Recife,Brazil:IEEE,2005:1894-1900.
[10]贺家李,宋从矩.电力系统继电保护原理[M].增订版.北京:中国电力出版社,2004.HE Jiali,SONG Congju. Scheme of protective relaying in electric power systems[M]. Enlarged edition. Beijing:China Electric Power Press,2004.
[11]张保会,尹项根.电力系统继电保护[M].北京:中国电力出版社,2005.ZHANG Baohui,YIN Xianggen. Power system protective relaying[M]. Beijing:China Electric Power Press,2005.
[12]须雷,李海涛,王万婷,等.智能变电站中断路器选相控制技术应用研究[J].高压电器,2014,50(11):63-68.XU Lei,LI Haitao,WANG Wanting,et al. Application research on the technology of CB phase-controlled in smart substation[J]. High Voltage Apparatus,2014,50(11):63-68.
[13]母秀清,方春恩,董恩源,等.基于相关分析的同步断路器可控开断故障选相研究[J].高压电器,2011,47(1):39-42.MU Xiuqing,FANG Chun’en,DONG Enyuan,et al. Fault type identification for controlled interruption of synchronous breaker based on correlation analysis[J]. High Voltage Apparatus,2011,47(1):39-42.
[14]王亚强,焦彦军.一种新型高压输电线路故障选相元件[J].高电压技术,2005,31(10):21-23.WANG Yaqiang,JIAO Yanjun. New type fault phase selector of HV transmission lines[J]. High Voltage Engineering,2005,31(10):21-23.
[15]赵洪峰,吐尔逊·依布拉音,晁勤.一种电流突变量选相元件的探讨[J].继电器,2005,33(13):6-9.ZHAO Hongfeng,Tuerxun Yibulayin,CHAO Qin. Discussion of phase selection relay based on difference of phase currents[J]. Relay,2005,33(13):6-9.
[16]胥杰,张永健,高亮,等.单相自动重合闸故障选相元件及MATLAB仿真研究[J].高压电器,2010,46(9):19-21.XU Jie,ZHANG Yongjian,GAO Liang,et al. Single-phase automatic reclosing based on fault phase selection and Matlab simulation[J]. High Voltage Apparatus,2010,46(9):19-21.
[17]郑涛,刘万顺,杨奇逊,等.一种基于模糊逻辑的新型故障序分量选相元件[J].电力系统自动化,2003,27(12):41-45.ZHENG Tao,LIU Wanshun,YANG Qixun,et al. A new phase selector based on fault sequence components and fuzzy logic theory[J]. Automation of Electric Power Systems,2003,27(12):41-45.
[18]林湘宁,刘沛,杨春明,等.基于相关分析的故障序分量选相元件[J].中国电机工程学报,2002,22(5):16-21.LIN Xiangning,LIU Pei,YANG Chunming,et al. A superimposed phase selector based on symmetrical components and correlation analysis[J]. Proceesings of the CSEE,2002,22(5):16-21.
[19]刘凯,索南加乐.基于故障支路电流序分量相位关系的选相元件[J].电力自动化设备,2013,33(3):77-83.LIU Kai,SUONAN Jiale. Phase selection element based on phase relationship between sequence components of faulty branch current[J]. Electric Power Automation Equipment,2013,33(3):77-83.
[20]刘建辉.基于分布参数的半波长交流输电线路保护原理研究[D].北京:华北电力大学,2012.LIU Jianhui. Study on protection principle for half wavelength AC transmission line based on distributed parameters[D]. Beijing:North China Electric Power University,2012.
[21]常宝波,段玉倩,贺家李,等.一种用于零、负序电流纵差保护的实用选相元件[J].电力系统自动化,2005,29(20):76-80.CHANG Baobo,DUAN Yuqian,HE Jiali,et al. Practical fault type selection method for line zero and negative sequence current differential protection[J]. Automation of Electric Power Systems,2005,29(20):76-80.
[22]杨铖,索南加乐,贾伟,等.采用双端量的高压输电线路选相元件[J].高电压技术,2011,37(5):1261-1267.YANG Cheng,SUONAN Jiale,JIA Wei,et al. Transmission line phase selector of measurements at two terminals[J].High Voltage Engineering,2011,37(5):1261-1267.
[2]梁旭明.半波长交流输电技术研究及应用展望[J].智能电网,2015,3(12):1091-1096.LIANG Xuming. Technology research and application prospect of half-wavelength alternating current transmission[J].Smart Grid,2015,3(12):1091-1096.
[3]束洪春,曹璞璘,董俊,等.考虑线路参数依频特性的特高压半波长交流输电线路行波传播分析[J].高电压技术,2015,41(3):716-723.SHU Hongchun,CAO Pulin,DONG Jun,et al. Analysis of travelingwaveinUHVhalf-wavelengthtransmissionlinesconsidering frequency dependent characteristics[J]. Hihg Voltage Engineering,2015,41(3):716-723.
[4]秦晓辉,张志强,徐征雄,等.基于准稳态模型的特高压半波长交流输电系统稳态特征及暂态稳定研究[J].中国电机工程学报,2011,31(31):66-76.QIN Xiaohui,ZHANG Zhiqiang,XU Zhengxiong,et al.Study on the sready state characteristic and transient stability of UHV AC half-wave-length transmission system based on quasi-steady model[J]. Proceesings of the CSEE,2011,31(31):66-76.
[5]娄颖,周沛洪,修木洪,等.特高压半波长交流输电线路电磁暂态仿真[J].高电压技术,2012,38(6):1459-1465.LOU Ying,ZHOU Peihong,XIU Muhong,et al. Electromagnetic transient simulation of UHV half wavelength AC transmission line[J]. High Voltage Engineering,2012,38(6):1459-1465.
[6]王玲桃,崔翔.特高压半波长交流输电线路稳态特性研究[J].电网技术,2011,35(9):7-12.WANG Lingtao,CUI Xiang. Research on steady-state operation characteristics of UHV half-wavelength AC power transmission line[J]. Power System Technology,2011,35(9):7-12.
[7] PORTELA C,TAVARES M C. Modeling simulation and optimization of transmission lines[C]//Applicability and Limitations of Some Used Procedures. Recife,Brazil:IEEE,2002:1-38.
[8] SOKOLOV N I,SOKOLOVA R N. The feasibility of using half-wave power transmission lines at higer frequencies[J].Electrical Technology Russia,1999(1):66-84.
[9] DIAS R,SANTO G,AREDES M. Analysis of a series tap for half-wavelength transmission lines using active filterss[C]//IEEE 36th Power Electronics Specialists Conference. Recife,Brazil:IEEE,2005:1894-1900.
[10]贺家李,宋从矩.电力系统继电保护原理[M].增订版.北京:中国电力出版社,2004.HE Jiali,SONG Congju. Scheme of protective relaying in electric power systems[M]. Enlarged edition. Beijing:China Electric Power Press,2004.
[11]张保会,尹项根.电力系统继电保护[M].北京:中国电力出版社,2005.ZHANG Baohui,YIN Xianggen. Power system protective relaying[M]. Beijing:China Electric Power Press,2005.
[12]须雷,李海涛,王万婷,等.智能变电站中断路器选相控制技术应用研究[J].高压电器,2014,50(11):63-68.XU Lei,LI Haitao,WANG Wanting,et al. Application research on the technology of CB phase-controlled in smart substation[J]. High Voltage Apparatus,2014,50(11):63-68.
[13]母秀清,方春恩,董恩源,等.基于相关分析的同步断路器可控开断故障选相研究[J].高压电器,2011,47(1):39-42.MU Xiuqing,FANG Chun’en,DONG Enyuan,et al. Fault type identification for controlled interruption of synchronous breaker based on correlation analysis[J]. High Voltage Apparatus,2011,47(1):39-42.
[14]王亚强,焦彦军.一种新型高压输电线路故障选相元件[J].高电压技术,2005,31(10):21-23.WANG Yaqiang,JIAO Yanjun. New type fault phase selector of HV transmission lines[J]. High Voltage Engineering,2005,31(10):21-23.
[15]赵洪峰,吐尔逊·依布拉音,晁勤.一种电流突变量选相元件的探讨[J].继电器,2005,33(13):6-9.ZHAO Hongfeng,Tuerxun Yibulayin,CHAO Qin. Discussion of phase selection relay based on difference of phase currents[J]. Relay,2005,33(13):6-9.
[16]胥杰,张永健,高亮,等.单相自动重合闸故障选相元件及MATLAB仿真研究[J].高压电器,2010,46(9):19-21.XU Jie,ZHANG Yongjian,GAO Liang,et al. Single-phase automatic reclosing based on fault phase selection and Matlab simulation[J]. High Voltage Apparatus,2010,46(9):19-21.
[17]郑涛,刘万顺,杨奇逊,等.一种基于模糊逻辑的新型故障序分量选相元件[J].电力系统自动化,2003,27(12):41-45.ZHENG Tao,LIU Wanshun,YANG Qixun,et al. A new phase selector based on fault sequence components and fuzzy logic theory[J]. Automation of Electric Power Systems,2003,27(12):41-45.
[18]林湘宁,刘沛,杨春明,等.基于相关分析的故障序分量选相元件[J].中国电机工程学报,2002,22(5):16-21.LIN Xiangning,LIU Pei,YANG Chunming,et al. A superimposed phase selector based on symmetrical components and correlation analysis[J]. Proceesings of the CSEE,2002,22(5):16-21.
[19]刘凯,索南加乐.基于故障支路电流序分量相位关系的选相元件[J].电力自动化设备,2013,33(3):77-83.LIU Kai,SUONAN Jiale. Phase selection element based on phase relationship between sequence components of faulty branch current[J]. Electric Power Automation Equipment,2013,33(3):77-83.
[20]刘建辉.基于分布参数的半波长交流输电线路保护原理研究[D].北京:华北电力大学,2012.LIU Jianhui. Study on protection principle for half wavelength AC transmission line based on distributed parameters[D]. Beijing:North China Electric Power University,2012.
[21]常宝波,段玉倩,贺家李,等.一种用于零、负序电流纵差保护的实用选相元件[J].电力系统自动化,2005,29(20):76-80.CHANG Baobo,DUAN Yuqian,HE Jiali,et al. Practical fault type selection method for line zero and negative sequence current differential protection[J]. Automation of Electric Power Systems,2005,29(20):76-80.
[22]杨铖,索南加乐,贾伟,等.采用双端量的高压输电线路选相元件[J].高电压技术,2011,37(5):1261-1267.YANG Cheng,SUONAN Jiale,JIA Wei,et al. Transmission line phase selector of measurements at two terminals[J].High Voltage Engineering,2011,37(5):1261-1267.