基于MEEMD与TEO的电缆故障测距方法
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摘要
正确识别故障行波波头和精确的双端测距算法可保障电缆故障行波测距精度。为解决希尔伯特黄变换(HHT)中经验模态分解(EMD)存在的模态混叠问题,提出一种基于改进集总经验模态分解(MEEMD)和Tea-ger能量算子相结合的电缆故障行波检测方法。针对故障行波波速及线路实际长度变化对双端测距精度的影响,推导出一种不受波速影响的双端测距算法。PSCAD/EMTDC仿真结果验证了该方法可行且测距精度高。
Correct identification of fault line wave head and accurate double-terminal traveling wave distance measuring ensure the accuracy of cable fault travel wave distance measurement.In order to solve the problem of modal aliasing in the empirical mode decomposition(EMD) in Hilbert Huang transform(HHT),a new method based on modified ensemble empirical mode decomposition(MEEMD)and Teager energy operator is proposed for the traveling wave fault location.The problem of the influence of the fault traveling wave velocity and the actual length of the line on double-terminal traveling wave distance measuring accuracy,double-terminal traveling wave distance measure is proposed which is not affected by wave velocity.The effectiveness and high precision of the proposed method are demonstrated by PSCAD/EMTDC simulation results.
Correct identification of fault line wave head and accurate double-terminal traveling wave distance measuring ensure the accuracy of cable fault travel wave distance measurement.In order to solve the problem of modal aliasing in the empirical mode decomposition(EMD) in Hilbert Huang transform(HHT),a new method based on modified ensemble empirical mode decomposition(MEEMD)and Teager energy operator is proposed for the traveling wave fault location.The problem of the influence of the fault traveling wave velocity and the actual length of the line on double-terminal traveling wave distance measuring accuracy,double-terminal traveling wave distance measure is proposed which is not affected by wave velocity.The effectiveness and high precision of the proposed method are demonstrated by PSCAD/EMTDC simulation results.
引文
[1]杨军,伍咏红,江文波,等.基于双端故障信息的高压电缆-架空线混和线路故障测距方法[J].电网技术,2015,34(1):208-213.
[2]黄忠棋.采用行波固有频率的混和线路故障测距新方法[J]电力系统及其自动化学报,2015,27(11):73-79.
[3]覃剑,陈祥训,刘建超,等.利用小波变换的双端行波测距新方法[J].中国电机工程学报,2000,20(8):6-10.
[4]王星海,许珉,谢志棠,等.基于小波变换和自相关分析的电力电缆故障测距[J].继电器,2005,33(12):32-35.
[5]廖晓辉,赵肖健,梁恒娜.一种基于Hilbert-Huang变换的电力电缆故障测距方法[J]电力系统保护与控制,2017,45(3):20-25.
[6]田书,寿好俊,尚鹏辉.基于HHT的谐振接地配电网暂态量故障选线研究[J].测控技术,2017,36(3):14-19.
[7]黄诚惕.希尔伯特-黄变换及其应用研究[D].成都:西南交通大学,2006.
[8]张小丽.基于希尔伯特-黄变换的输电线路故障行波定位与保护方法[D].长沙:长沙理工大学,2008.
[9]田书,尚鹏辉,寿好俊.基于EEMD的电缆故障测距方法仿真研究[J].测控技术,2016,35(11):36-39.
[10]郑旭,郝志勇,卢兆刚,等.基于MEEMD的内燃机机体活塞敲击激励与燃烧爆发激励分离研究[J].震动与冲击,2012,31(6):109-113.
[11]夏欢.基于智能信号分析的配电网故障定位方法的仿真研究[D].北京:华北电力大学,2015.
[12]黄雄,王志华,尹项根,等.高压输电线路行波测距的行波波速确定方法[J]电网技术,2004,28(19):34-37.
[13]郝勇奇,王倩,周士琼,等.基于LMD与Teager能量算子的VSC-HVDC输电线路故障定位[J]电力系统保护与控制,2017,45(1):81-88.
[14]任艳霞.电力电缆故障诊断与监测[D].北京:北京交通大学,2007.
[15]高艳丰.基于VMD和TEO的高压输电线路雷击故障测距研究[J].电工技术学报,2016,31(1):24-33.
[2]黄忠棋.采用行波固有频率的混和线路故障测距新方法[J]电力系统及其自动化学报,2015,27(11):73-79.
[3]覃剑,陈祥训,刘建超,等.利用小波变换的双端行波测距新方法[J].中国电机工程学报,2000,20(8):6-10.
[4]王星海,许珉,谢志棠,等.基于小波变换和自相关分析的电力电缆故障测距[J].继电器,2005,33(12):32-35.
[5]廖晓辉,赵肖健,梁恒娜.一种基于Hilbert-Huang变换的电力电缆故障测距方法[J]电力系统保护与控制,2017,45(3):20-25.
[6]田书,寿好俊,尚鹏辉.基于HHT的谐振接地配电网暂态量故障选线研究[J].测控技术,2017,36(3):14-19.
[7]黄诚惕.希尔伯特-黄变换及其应用研究[D].成都:西南交通大学,2006.
[8]张小丽.基于希尔伯特-黄变换的输电线路故障行波定位与保护方法[D].长沙:长沙理工大学,2008.
[9]田书,尚鹏辉,寿好俊.基于EEMD的电缆故障测距方法仿真研究[J].测控技术,2016,35(11):36-39.
[10]郑旭,郝志勇,卢兆刚,等.基于MEEMD的内燃机机体活塞敲击激励与燃烧爆发激励分离研究[J].震动与冲击,2012,31(6):109-113.
[11]夏欢.基于智能信号分析的配电网故障定位方法的仿真研究[D].北京:华北电力大学,2015.
[12]黄雄,王志华,尹项根,等.高压输电线路行波测距的行波波速确定方法[J]电网技术,2004,28(19):34-37.
[13]郝勇奇,王倩,周士琼,等.基于LMD与Teager能量算子的VSC-HVDC输电线路故障定位[J]电力系统保护与控制,2017,45(1):81-88.
[14]任艳霞.电力电缆故障诊断与监测[D].北京:北京交通大学,2007.
[15]高艳丰.基于VMD和TEO的高压输电线路雷击故障测距研究[J].电工技术学报,2016,31(1):24-33.