The Research of Voltage Sag and Power Frequency  Overvoltage on 110kV Resistance Grounding System

Guo Zeng; Guangliang Feng; Yanping Lv; Shan Sun

doi:10.4236/epe.2013.54B167

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Energy and Power Engineering > Vol.5 No.4B, July 2013

The Research of Voltage Sag and Power Frequency Overvoltage on 110kV Resistance Grounding System ()

Guo Zeng, Guangliang Feng, Yanping Lv, Shan Sun

Huangshi Power Supply Company, Huangshi, China.
School of Electrical Engineering, Wuhan University, Wuhan, China.

DOI: 10.4236/epe.2013.54B167 PDF HTML 4,454 Downloads 5,288 Views Citations

Abstract

This paper researches the voltage transfer characteristics when one-phase ground fault occurred in the resistance grounding system, by using the theory of the asymmetric variable characteristics and the sequence network analysis of the -11 transformer, and concludes the scope of voltage sag and swell and the degree of power frequency overvoltage and their influencing factors in the 110 kV resistance grounding system. Accordingly this paper puts forward the resistance choosing principle: the resistance grounding coefficient must be equal to or greater than 10. So it can not only wipe out the voltage sag and voltage swell but also make sure the overvoltage is limited to electrical equipment allowing range. The method mentioned above is verified by simulation results of a 110 kV power system in ATP.

Keywords

Neutral Grounding System by Resistance; One-phase Grounding Fault; Power Frequency Overvoltage

Share and Cite:

G. Zeng, G. Feng, Y. Lv and S. Sun, "The Research of Voltage Sag and Power Frequency Overvoltage on 110kV Resistance Grounding System," Energy and Power Engineering, Vol. 5 No. 4B, 2013, pp. 873-876. doi: 10.4236/epe.2013.54B167.

Conflicts of Interest

The authors declare no conflicts of interest.

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