基于VMD-DE的高压输电线路行波故障定位方法
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摘要
为了进一步提高高压输电线路行波故障定位精度,提出了一种基于变分模态分解(Variational Mode Decomposition,VMD)与差分熵(Difference-entropy,DE)相结合的输电线路行波故障定位新方法。首先,用变分模态分解法对故障电流线模分量分解得到多个固有模态函数,然后利用差分熵提取模态函数的突变信息,得到行波波头的到达时刻,最后,采用双端行波测距法计算故障点距离,仿真结果表明该方法具有较高的定位精度。
In order to further improve the high voltage transmission line traveling wave fault location accuracy, a detection method for traveling wave in transmission line based on Variational Mode Decomposition(VMD) and Difference-Entropy(DE) is proposed in this paper. First of all, using VMD on the component of fault current line to get multiple intrinsic mode function(IMF). Then the mutation information of the first IMF is received with the help of DE to determine the arriving time of the current traveling wave head. Finally, the fault distance is calculated by double terminal traveling wave fault location method. The results of simulation show that the new method has a higher positioning accuracy.
In order to further improve the high voltage transmission line traveling wave fault location accuracy, a detection method for traveling wave in transmission line based on Variational Mode Decomposition(VMD) and Difference-Entropy(DE) is proposed in this paper. First of all, using VMD on the component of fault current line to get multiple intrinsic mode function(IMF). Then the mutation information of the first IMF is received with the help of DE to determine the arriving time of the current traveling wave head. Finally, the fault distance is calculated by double terminal traveling wave fault location method. The results of simulation show that the new method has a higher positioning accuracy.
引文
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[13]高艳丰,朱永利,闫红艳等.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):25-32.
[14]高艳丰,朱永利,闫红艳等.一种新型的输电线路双端行波故障定位[J].电力系统保护与控制,2016,44(8):9-13.
[15]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.
[2]王奎鑫,祝成,孙佳佳等.输电线路组合行波测距方法研究[J].电力系统保护与控制,2012,40(15):82-88.
[3]朱永利,范新桥,尹金良.基于三点电流测量的输电线路行波故障定位新方法[J].电工技术学报,2012,27(3):261-267.
[4]黄子俊,陈允平.行波故障定位中小波基的选择[J].电力系统自动化,2006,30(3):61-64,104.
[5]张小丽,曾祥君,马洪江等.基于Hilbert-Huang变换的电网故障行波定位方法[J].电力系统自动化,2008,32(8):64-68.
[6]范新桥,朱永利,卢伟甫.基于EMD-TEO的输电线路行波故障定位[J].电力系统保护与控制,2012,40(9):9-12.
[7]DRAGOMIRETSKIY K,ZOSSO D.Variational mode decomposition[J].Transactions on Signal Processing,2013,10(1109):1-15.
[8]SHANNON C E.A Mathematical Theory of Communication[J].The Bell System Technical Journ al,1984,(27):597-610,623-656.
[9]姜万录,郑直,朱勇,李扬.基于形态差值滤波和差分熵的滚动轴承故障诊断[J].中国机械工程,2015,26(1):63-69.
[10]贾惠彬,张国云.一种基于LMD-DE的输电线路行波检测方法[J].电测与仪表,2015,52(5):68-70.
[11]王振威.基于变分模态分解的故障诊断方法研究[D].秦皇岛:燕山大学,2015.
[12]赵静,何正友,钱清泉.利用广义形态滤波与差分熵的电能质量扰动检测[J].中国电机工程学报,2009,(7):121-127.
[13]高艳丰,朱永利,闫红艳等.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):25-32.
[14]高艳丰,朱永利,闫红艳等.一种新型的输电线路双端行波故障定位[J].电力系统保护与控制,2016,44(8):9-13.
[15]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.