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Analysis and improvement of the‘S injection’fault feeder detection method

LIU Ying-liang1，GONG Jun-xiang2，WEI Guo-dong3，MENG Ling-jun4，ZHANG Jie2   

  1. 1. School of Electrical Engineering，Shandong University；2. Weihai Electric Power Company；3. Huadian Zibo Thermoelectric Power Co.,Ltd.；4. Shandong University Electric Power Tecchnology Co.,Ltd.
  • Received:2007-01-04 Revised:1900-01-01 Online:2007-08-24 Published:2007-08-24
  • Contact: LIU Ying-liang

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Abstract: The characteristics of system parameters were given when a single-phase-to-ground fault occurs in a neural ineffectively grounded system, and the principles and methods of present fault feeder detection devices were analyzed. The fault feeder detection method was investigated based on the ‘S injection' principle, and three methods were proposed to improve the accuracy of fault feeder detection, i.e., magnitude comparison of burst current, signal phase detection and double frequencies injection.

Key words: neural ineffectively ground, S injection, single-phase-to-ground fault, feeder detection

CLC Number: 

  • TM771
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