一种新型的输电线路双端行波故障定位方法

高艳丰; 朱永利; 闫红艳; 陈旭

引用本文:	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方法[J].电力系统保护与控制,2016,44(8):8-13.
	GAO Yanfeng,ZHU Yongli,YAN Hongyan,et al.A new fault location method of transmission lines based on double-terminal traveling wave[J].Power System Protection and Control,2016,44(8):8-13

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一种新型的输电线路双端行波故障定位方法
高艳丰^1,2, 朱永利¹, 闫红艳², 陈旭¹
1.新能源电力系统国家重点实验室(华北电力大学)，河北保定 071003;2.河北工程大学水电学院，河北邯郸 056038

摘要:

针对行波故障测距技术中行波检测准确性和行波波速对测距精度的影响，提出一种新的双端行波故障定位方法。首先，介绍了变分模态分解(Variational Mode Decomposition，VMD)和 Teager能量算子(Teager Energy Operator，TEO)的特点，并将VMD与TEO相结合应用于故障行波波头的检测。其次，在双端行波故障测距原理的基础上，根据故障行波的传播路径，推导出一种不受行波波速和线路实际长度变化影响的行波故障测距新算法。该算法不需要检测行波反射波的波头，测距原理简单。最后，通过EMTDC仿真验证方法的正确性和准确性。大量的仿真结果表明该方法行波波头检测效果较好，测距准确度较高。

关键词: 输电线路行波检测准确性行波波速 VMD TEO 双端行波测距法

DOI：10.7667/PSPC151101

分类号:

基金项目:中央高校基本科研业务费专项资金资助项目(2014xs74)

A new fault location method of transmission lines based on double-terminal traveling wave

GAO Yanfeng^1,2, ZHU Yongli¹, YAN Hongyan², CHEN Xu¹

1.State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources (North China Electric Power University), Baoding 071003, China;2.Hebei University of Engineering, Handan 056038, China

Abstract:

For the influence of traveling-wave detection accuracy and wave velocity on the location accuracy in traveling wave fault location technology, a new double-terminal traveling wave fault location method is proposed. First, the characteristics of Variational Mode Decomposition (VMD) and Teager Energy Operator (TEO) is introduced and applied to traveling wave detection. Second, by analyzing the propagation path of fault traveling wave, a new fault location algorithm that avoiding traveling wave velocity influence is deduced based on the principle of double-terminal traveling wave fault location, the wave head of traveling wave reflection does not need to detect using this algorithm, and its fault location principle is simple. Finally, EMTDC simulations prove that the method is correct and accurate. A lot of simulations results show that this method has better effect on traveling wave detection, and location accuracy is higher.

Key words: transmission line traveling wave detection accuracy traveling wave velocity VMD TEO double-terminal traveling wave location method

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