In-situ insulation test of 400kV GIS

Author

Mohseni, H. ; Akmal, A. Shaygani ; Jadidian, J. ; Agheb, E. ; Hashemi, E. ; Naieny, A. ; Ghorbandaeipour, A. ; Niayesh, K.

Author_Institution

Sch. of Electr. & Comput. Eng., Univ. of Tehran, Tehran

fYear

2008

fDate

21-24 April 2008

Firstpage

1

Lastpage

5

Abstract

To guarantee the Insulation strength of gas insulated substations (GIS), a number of different voltage waveforms, e.g. switching, lightning and AC, have to be applied to the GIS after installation. Because of very huge dimensions of GIS for nominal high voltages, it is not possible to carry out these tests in the factory and parts of the whole system have to be delivered and put together to build the complete GIS. As the result, all insulation tests have to be performed in-situ. Even if different systems are tested in the factory, because of problems occurring during the transportation and mistakes by the installation, the insulation strength of the whole GIS can be degraded. In this paper, the test set up and the measurement results of a 400 kV GIS installed for the Mobarakeh steel industries, Isfahan, IRAN, are reported. Because of relatively large capacitances of the gas Insulated Substations, the power ratings of the test voltage sources have to be very high. For this purpose, different possible solutions and the measurement results are discussed in detail.

Keywords

gas insulated substations; insulation testing; GIS; IRAN; Isfahan; Mobarakeh steel industries; gas insulated substations; insulation strength; insulation test; voltage 400 kV; Gas insulation; Geographic Information Systems; Insulation testing; Lightning; Performance evaluation; Production facilities; Substations; Switchgear; System testing; Voltage; Cascaded Transformers; Gas Insulated Substations; Insulation Tests; Series and Parallel Resonance;

fLanguage

English

Publisher

ieee

Conference_Titel

Transmission and Distribution Conference and Exposition, 2008. T&D. IEEE/PES

Conference_Location

Chicago, IL

Print_ISBN

978-1-4244-1903-6

Electronic_ISBN

978-1-4244-1904-3

Type

conf

DOI

10.1109/TDC.2008.4517226

Filename

4517226