A Substation DC System Grounding Fault Analysis and Processing

Abstract:

A 220kV substation DC system ground fault detailed analysis and lookup scheme are proposed in this paper. The ground fault was mainly due to the cold weather as well as equipment wiring unreasonable wear the cable jacket rupture, causing 220kV main transformer cooler control box on the 2nd DC grounding occurred. In addition, through this ground fault finding, also found a DC system insulation monitoring device functional shortcomings and DC circuit loop back problems exist, the paper put forward DC circuit loop back detailed solutions, and the insulation monitoring device of the transformation proposal are proposed.

• Periodical: Applied Mechanics and Materials (Volumes 494-495)
• Pages: 1784-1786
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.494-495.1784
• Online since: February 2014
• Authors: Gang Chen*, Zhong Li, Ping Li, Lei Liu, Miao Wang, Yan Jun Pang, Yan Li
• Keywords: Dc Ground Fault, Dc System, Fault Analysis, Substation

References

[1] Xia Xinmin, Power cable end production and fault finding test, Chemical Industry Press, Beijing, (2008).

[2] Zhang Guodong, Cable fault analysis and test, China Electric Power Press, Beijing, (2005).

[3] Chen Huagang, Electrical equipment preventive test methods and diagnostic techniques, China Water Power Press. Beijing, (2009).

[4] Chang Hongtao, DC system fault hazards and finding, Technology Innovation Herald, 5(2013) 93.

[5] Liu Yi, DC system grounding cause analysis process and finding, Silicon Valley, 10(2013) 21-22.