Field Tests of the Traveling Wave Based Protection for Ungrounded Distribution Network

被引：0
|
作者：
Wang, Yujun [1 ]
Dong, Xinzhou [1 ]
Shi, Shenxing [1 ]
Wang, Jun [1 ]
Geng, Jianzhao [1 ]
机构：
[1] Tsinghua Univ, Dept Elect Engn, Beijing 100084, Peoples R China
来源：
2015 MODERN ELECTRIC POWER SYSTEMS (MEPS) | 2015年
关键词：
Power distribution system; Neutral non-effectively grounded; Single-phase-to-ground fault test; Traveling waves based protection; TRANSFORMS;
D O I：
暂无
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
A typical radial ungrounded distribution network model is set up in the 10kV true type distribution network fault simulation laboratory. Through a series of single-phase-to-ground fault tests, the zero sequence and three-phase voltage and current waveforms of traveling wave and power frequency are obtained. Wavelet multiresolution analysis is used to decompose the current and voltage traveling waves. The local modulus maxima of the wavelet transform can extract the polarity of the initial traveling wave. These waveforms prove that the current traveling wave magnitude is much more significant than power frequency current. Besides, the tests also prove that the initial zero sequence current and voltage waves in the faulty feeder are reverse in polarity.
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页数：6
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