The Identification of Single-Line-to-Ground Fault in Neutral Un-Effectively Earthed System

Feng Xiang Dong; Chao Guo Tang; Zheng Yuan; Wen Hai Zhang

doi:10.4028/www.scientific.net/AMR.805-806.673

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 805-806The Identification of Single-Line-to-Ground Fault...

The Identification of Single-Line-to-Ground Fault in Neutral Un-Effectively Earthed System

Abstract:

The correct and reliable identification of SLG(single-line-to-ground) fault is the foundation of starting the fault line selection and location device in neutral un-effectively earthed system. The traditional method based on the zero sequence voltage is invalid when the fault happens with high impedance, because the zero sequence voltage in bus is small. So a new algorithm based on the variation of voltage including the zero sequence voltage and phase voltages is proposed. The algorithm is not affected by the unbalance of system, and the sensitivity and the reliability of the algorithm are considered simultaneously. The algorithm is proved effectively by the large numbers of simulations using PSCAD/EMTDC program.

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Periodical:

Advanced Materials Research (Volumes 805-806)

Pages:

673-677

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.805-806.673

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Online since:

September 2013

Authors:

Feng Xiang Dong, Chao Guo Tang, Zheng Yuan, Wen Hai Zhang

Keywords:

Fault Identification, High Impedance Fault, Neutral Un-Effectively Earthed System, Single-Line-to-Ground Fault

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