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

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DOI: 10.4236/epe.2013.54B167 2,794 Downloads 3,613 Views Citations

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Guo Zeng, Guangliang Feng, Yanping Lv, Shan Sun

Affiliation(s)

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

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

Cite this paper

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.

References

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[2] IEEE Recommended Practice for Evaluating Electric Power System Compatibility with Electronic Process Equipment[S]. IEEE Standard，1998, pp. 1346-1998.

[3] D. Tao and X. N. Xiao, “Voltage Sags Types under Different Grouding Modes of Neutral and Their Propagation: partⅡ, Transactions of China Electrotechnical Society, Vol. 22, No. 10, 2007，pp. 156-159.

[4] G. R. Xie, “Power System Overvoltage,” Wuhan Water Electrical Institute Press, China, 1985.

[5] The People’s Republic of Electrical Power Industry. Overvoltage Protection and Insulation Coordination for AC Electrical Installations, Beijing, China: China Electric Power Press, 2010.

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[1]	Y. Li, Y. P. Duan, J. Qiu, et al., Voltage Sag Analysis and Fault Position Sag Coefficient Calculation, High Voltage Engineering, Vol. 32, No. 7, 2006，pp. 113-115.

[2]	IEEE Recommended Practice for Evaluating Electric Power System Compatibility with Electronic Process Equipment[S]. IEEE Standard，1998, pp. 1346-1998.

[3]	D. Tao and X. N. Xiao, “Voltage Sags Types under Different Grouding Modes of Neutral and Their Propagation: partⅡ, Transactions of China Electrotechnical Society, Vol. 22, No. 10, 2007，pp. 156-159.

[4]	G. R. Xie, “Power System Overvoltage,” Wuhan Water Electrical Institute Press, China, 1985.

[5]	The People’s Republic of Electrical Power Industry. Overvoltage Protection and Insulation Coordination for AC Electrical Installations, Beijing, China: China Electric Power Press, 2010.

[6]	Z. Y. Xu, “Digital Protection for Power Transformer and Medial-low Voltage Electric Power Net,” China WaterPower Press, Beijing, China, 2004.