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
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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.
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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