Analysis of effective factors on transient ground potential rise in gas insulated substations

Document Type: Research Paper

Authors

Faculty of Electrical & Computer Engineering, Semnan University, Semnan, Iran

Abstract

This study presents the manner in which transient modeling concepts, which are fully analyzed in the referred standards, are implemented, for the purpose of evaluating the Transient Ground Potential Rise (TGPR). This is a phenomenon of 10–100kV voltages with up to 10µs duration on the grounded enclosure of Gas Insulated Substations (GIS), which may cause concern for personnel safety and problems for protection and control circuits in substations. This article summarizes the results of the investigation for influential factors on TGPR, such as, different contingency conditions and grounding system models. This article focuses on the TGPR study of "Siah-bishe" 400kV gas insulated substation. The study was carried out by modeling all pieces of equipment in the ElectroMagnetic Transients Program (EMTP)-RV, with careful consideration of different modeling guidelines and instructions described in the available standards.

Keywords


[1] Hamza H.A., Gawad N.A., Investigation of over voltages in gas insulated substation (G.I.S.) caused by a lightning stroke, Energy Conv. Management, 35 (12), (1994) 1107-1116.

[2] Povh D., Schmitt H., Valcker O., Wutzmann R., Modeling and analysis guidelines for very fast transients, IEEE Trans. Power Del, 11(4), (1996) 2028-2035.

[3] Chen W., Li Z., Liu W et al. Experiment and Simulation Research on VFTO in UHV GIS, 21, rue d’ Artois, F-75008 PARIS, CIGRE (2014).

[4] JIANG J., MA G., LI Ch et al. Measurement And Analysis Of VFTO In a 750kV Substation, Power and Energy Engineering Conference (APPEEC), March (2010).

[5] Hu R., Cui X., Chen W et al., Simulation of Very Fast Transient Overvoltage on UHV 1000Kv GIS Test Circuit, Electromagnetic Field Problems and Applications (ICEF), (2012) 1-4.

[6] Shu Y., Chen W., Li Z et al.,  Experimental Research on Very-Fast Transient Overvoltage in 1100-kV Gas-Insulated Switchgear, IEEE Transactions on Power Del, 28 (1), (2013) 458 - 466.

[7] Yinbiao S., Bin H., Ji-Ming L et al., Influence of the Switching Speed of the Disconnector on Very Fast Transient Overvoltage, IEEE Trans on Power Del, 28 (4), (2013) 2080-2084.

[8] IEEE Guide for Gas-Insulated Substations, Std C37.122.1, (1993).

[9] IEC 60071-1, “Insulation Coordination-Part 1: Definitions, Principles and Rules,” eight editions, (2006).

[10] Chen L., Jinliang H., Jun H et al., Switching Transient of 1000-kV UHV System Considering Detailed Substation Structure, IEEE Trans. Power Del, 27 (1), (2012) 112–122.

[11] Tavakoli A., Gholami A., Nouri H et al.,Comparison between Suppressing Approaches of Very Fast Transients in Gas-Insulated Substations (GIS), IEEE Trans. Power Del, 28 (1), (2013) 303–310.

[12] Grigsby L.L, Power Systems, Electric Power Engineering: Handbook. Third edition, (2006).

[13] Fujimoto N., Dick E.P., Boggs S.A et al, Transient ground potential rise in gas-insulated substations experimental studies, IEEE Trans. Power Apparatus. Syst., 101 (10), (1982) 3603-3609.

[14] Jonjic S., Baus Z., Barukcic M., Induced Over voltages on the SF6 Substation Enclosure Caused by Switching, Int. Journal of Elect. Computer Eng. Syst. (IJECES), 2 (2), (2011) 55-65.

[15] Chowdhuri P., De la Rosa P., Lambert S.R et al, Power System Transients:  Electrical Engineering Handbook, (2000).

[16] IEC 60071-4, Part 4: Computational Guide to Insulation Coordination and Modeling of Electrical Networks, (2004).

[17] Kumar V., Thomas J.M., Naidu M.S., Influence of switching conditions on the VFTO magnitudes in a GIS, IEEE Trans. Power Del, 16 (4), (2001) 539–544.

[18] Tavakoli A., Gholami A., Alamuti M.M., Suppression of very fast transients in gas-insulated substation via terminal and capacitance components feasibility study, European Trans. Elect. Power, 22 (7), (2012) 976–988.

[19] Velasco M.J., Power System Transients Parameter Determination, CRC Press, Taylor & Francis Group, (2010).

[20] Shenkman A.L., Transient Analysis of Electric Power Circuits Handbook, Published by Springer, (2005).