Traveling Wave Based Single-Phase-to-Ground Protection Method for Power Distribution System

被引：75
|
作者：
Dong, Xinzhou [1 ]
Wang, Jun [2 ]
Shi, Shenxing [1 ]
Wang, Bin [1 ]
Dominik, Bak [1 ]
Redefern, Miles [3 ]
机构：
[1] Tsinghua Univ, Beijing 100084, Peoples R China
[2] Elect Power Planning & Engn Inst, Beijing 100120, Peoples R China
[3] Univ Bath, Dept Elect & Elect Engn, Bath, Avon, England
来源：
CSEE JOURNAL OF POWER AND ENERGY SYSTEMS | 2015年 / 1卷 / 02期
基金：
中国国家自然科学基金; 北京市自然科学基金;
关键词：
Distribution systems; relay protection; singlephase-to-ground fault; traveling wave; wavelet transform;
D O I：
10.17775/CSEEJPES.2015.00022
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：
Correct detection and identification of single-phase to-ground faults not effectively grounded in distribution systems is a major challenge for protection engineers. This paper proposes a novel traveling wave based protection method to solve this problem. The proposed method compares the polarities of current and voltage traveling waves measured immediately after the fault inception to determine the fault direction. Nuisance tripping is avoided by using the power frequency voltages detected on the busbar to inhibit operation. The power frequency voltages ensure that the system does not mal-operate due to noise and also provide discrimination for phase-to-phase and three-phase faults. The wavelet transform and modulus maxima theories are used to extract the polarity of traveling waves measured at the relaying point. The simulation studies demonstrate correct operation of protection, which is independent of fault distance, fault inception angle, fault path resistance, and the method used for neutral grounding.
引用
收藏
页码：75 / 82
页数：8
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