基于行波原理的双极直流输电接地极引线故障测距
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摘要
接地极引线运行状态因直流输电系统运行模式的不同而改变,研究接地极引线故障测距需要分别考虑其不同运行状态对行波测距的影响。围绕双极方式直流输电系统接地极引线故障测距,论文提出时域脉冲测量技术和单端行波故障测距的相结合的测距方案,对基于小波变换模极大值原理的行波波头定位和去噪方法加以理论分析,借助mat-lab仿真软件对接地极引线不同故障类型的测距进行仿真验证,分析不同故障类型反射行波特征量的区别,准确定位故障点的发生位置。
Grounding electrodes lead running state will change with HVDC system operation mode,changing operation state determines the complexity of the grounding electrodes leads fault location,so the influence of the grounding electrodes lead operation state should be considered for fault location.Based on above analysis,this paper puts forward a new method based on the Time Domain Reflectometry with Type A single-ended transmission line fault location principles based on travelling waves,presents a detection method of wave head via wavelet transform.On that basis,under different running state of grounding electrodes lead,the paper offers a fault locating study of three fault types with the help of the emulation software MATLAB.In the study,different traveling wave reflection feature of different fault types were discussed carefully,fault location was calculated accurately.The results show that the method can rapidly and accurately locate the line fault,distinguish the different fault type.
Grounding electrodes lead running state will change with HVDC system operation mode,changing operation state determines the complexity of the grounding electrodes leads fault location,so the influence of the grounding electrodes lead operation state should be considered for fault location.Based on above analysis,this paper puts forward a new method based on the Time Domain Reflectometry with Type A single-ended transmission line fault location principles based on travelling waves,presents a detection method of wave head via wavelet transform.On that basis,under different running state of grounding electrodes lead,the paper offers a fault locating study of three fault types with the help of the emulation software MATLAB.In the study,different traveling wave reflection feature of different fault types were discussed carefully,fault location was calculated accurately.The results show that the method can rapidly and accurately locate the line fault,distinguish the different fault type.
引文
[1]杨光,朱韬析,魏丽君,李立杰.直流输电系统z接地极线路故障研究[J].电力系统保护与控制,2009,37(23):26-27.
[2]徐丙垠,李京,陈平,陈羽,董新洲,葛耀中.现代行波测距技术及其应用[J].电力系统自动化,2001,(23):33-35.
[3]于桂音,陈平,徐丙垠,哈恒旭.基于行波原理的优化组合故障测距技术[J].继电器,2008,36(9):28-30.
[4]赵爱丽,徐丙垠,张正团.电力电缆脉冲电流测距法的改进[J].电力系统保护和控制,2009,37(24):17-19.
[5]许珉,白春涛,秦毅男,廖晓辉.电力电缆故障低压脉冲自动测距方法研究[J].继电器,2007,35(7):30-33.
[6]马丹丹,王晓茹.基于小波模极大值的单端行波故障测距.电力系统保护和控制,2009,37(3):15-16.
[7]胡铭,陈珩.基于小波变换模极大值的电能质量扰动检测与定位[J].电网技术,2001,25(3):24-26.
[8]赵婉君.高压直流输电工程技术[M].北京:中国电力出版社,2004.
[9]朱韬析,候元文,王超,陈为化.直流输电系统单极金属回线运行方式下线路接地故障及保护研究[J].电力系统保护与控制,2009,37(20):25-26.
[10]万耕,穆华宁.高压架空输电线路的行波故障测距方法[J].高压电器,2005,4(12):13-14.
[11]李俊,范春菊.基于小波分析的电缆—架空线混合输电线路行波故障测距方法[J].电网技术,2006,30(9):28-29.
[12]杨福生.小波变换的工程分析与应用[M].北京:北京科学出版社,1999.
[13]孔祥茜,吴继伟,岳继光.地震信号小波变换的去噪方法[J].计算机辅助工程,2005,14,(3):23-24.
[14]束洪春,刘可真,朱盛强,张广斌,朱子钊,张敏.±800kv特高压直流输电线路单端电气量暂态保护[J].中国电机工程学报,2010,30(31):33-35.
[15]李爱民,蔡泽祥,李晓华.直流线路行波传播特性的解析[J].中国电机工程学报,2010,30(25):28-30.
[2]徐丙垠,李京,陈平,陈羽,董新洲,葛耀中.现代行波测距技术及其应用[J].电力系统自动化,2001,(23):33-35.
[3]于桂音,陈平,徐丙垠,哈恒旭.基于行波原理的优化组合故障测距技术[J].继电器,2008,36(9):28-30.
[4]赵爱丽,徐丙垠,张正团.电力电缆脉冲电流测距法的改进[J].电力系统保护和控制,2009,37(24):17-19.
[5]许珉,白春涛,秦毅男,廖晓辉.电力电缆故障低压脉冲自动测距方法研究[J].继电器,2007,35(7):30-33.
[6]马丹丹,王晓茹.基于小波模极大值的单端行波故障测距.电力系统保护和控制,2009,37(3):15-16.
[7]胡铭,陈珩.基于小波变换模极大值的电能质量扰动检测与定位[J].电网技术,2001,25(3):24-26.
[8]赵婉君.高压直流输电工程技术[M].北京:中国电力出版社,2004.
[9]朱韬析,候元文,王超,陈为化.直流输电系统单极金属回线运行方式下线路接地故障及保护研究[J].电力系统保护与控制,2009,37(20):25-26.
[10]万耕,穆华宁.高压架空输电线路的行波故障测距方法[J].高压电器,2005,4(12):13-14.
[11]李俊,范春菊.基于小波分析的电缆—架空线混合输电线路行波故障测距方法[J].电网技术,2006,30(9):28-29.
[12]杨福生.小波变换的工程分析与应用[M].北京:北京科学出版社,1999.
[13]孔祥茜,吴继伟,岳继光.地震信号小波变换的去噪方法[J].计算机辅助工程,2005,14,(3):23-24.
[14]束洪春,刘可真,朱盛强,张广斌,朱子钊,张敏.±800kv特高压直流输电线路单端电气量暂态保护[J].中国电机工程学报,2010,30(31):33-35.
[15]李爱民,蔡泽祥,李晓华.直流线路行波传播特性的解析[J].中国电机工程学报,2010,30(25):28-30.
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