Application on State Evaluation of the Grounding Conductor Based on Fault Diagnosis Method

Abstract:

In this paper, fault diagnosis model of grounding grid is established combining electrical network theory with sensitivity analysis. A new method which is used to select the node pairs to calculate the corrosion situation of grounding grid is presented. Based on this method, the fault branch of grounding grid can be efficiently judged through topology diagram and port resistance without power failure and the excavation of large area. Field test was carried out at 220 kV electrical substations using the diagnosis method. The conductors diagnosed as severely corroded was excavated. The result was identical to the diagnosis results, indicating that this diagnosis method has engineering practicality.

• Periodical: Applied Mechanics and Materials (Volumes 635-637)
• Pages: 815-818
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.635-637.815
• Online since: September 2014
• Authors: Da Xing Wang, Shou Bao Liu, De Gang Gan, Bin He
• Keywords: False Fault, Fault Diagnosis, Grounding Grid, Substation

References

[1] Dongye Wang and Gang Dong: High Voltage Engineering. Vol. 27 (2001), p.64.

[2] ZHANG Bo, CUI Xiang, ZHAO Zhi-bin, LI Lin: Proceedings of the CSEE. Vol. 22(2002). p.59.

[3] LIU Li-qiang, LUO Xian-jue, WANG Sen, NIU Tao: Proceedings of the CSEE. Vol. 29(2009). p.33.

[4] XIAO Xin-hua, LIU Hua, CHEN Xian-lu, ZHANG Xiao-ling: Journal of Chongqing University( Natural Science Edition) . Vol. 24(2001). p.72.

[5] LIU Yu-gen, WU Li-xiang, WANG Shuo: Journal of Chongqing University . Vol. 31(2008). p.417.