Researching Parameters Selection, Testing Circuit Configuration in Lightning Impulse Test for 500kV Single Phase Power Transformer Produced in Vietnam
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Abstract
This article presents the result of researching in parameters selection in testing circuit configuration for the lightning impulse (LI) 1.2/50 ms power transformers which was produced in Viet Nam. This test was performed at The National Key Laboratory for High Voltage Techniques (HVLAB) - Institute of Energy, the unique laboratory in Vietnam where this test can be perform. In order to research the lightning impluse parameters and determine the endurance of high-voltage and ultra-high electrical equipment insulation in general and particularly for 500kV power transformer, it is necessary to set a simulation voltage of standard lightning impulse at 1.2/50 ms. These results will allow evaluating the quality of the insulation system in 500kV power transformer, the withstand ability of atmospheric overvoltage or operation overvoltage according to IEC60076-3,-4: 2000, TCVN6306-3: 2006; IEC60060-1: 1989, in order to obtain safety power transformer operation in gridline.
Keywords
Lightning Impulse (LI), Switching Impulse (SI), International Electrotechnical Commission (IEC)
Article Details
References
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[2] . Dieter Kind, Kurt Feser (2005), "High Voltage Test Techniques Second edition", University of Manitoba, Winnipeg, Canada.
[3] . Instruction manual, (2007), "Impulse Voltage Generator Type: GTN 3600 kV 180kJ", Passoni Villa - Italya.
[4]. IEC 60076-3, -4 (2009). "Power transformers - Part 3: Insulation levels, dielectric tests and external clearances in air" and Part 4: Guide to the lightning impulse and switching impulse testing -Power transformers and reactors.
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[2] . Dieter Kind, Kurt Feser (2005), "High Voltage Test Techniques Second edition", University of Manitoba, Winnipeg, Canada.
[3] . Instruction manual, (2007), "Impulse Voltage Generator Type: GTN 3600 kV 180kJ", Passoni Villa - Italya.
[4]. IEC 60076-3, -4 (2009). "Power transformers - Part 3: Insulation levels, dielectric tests and external clearances in air" and Part 4: Guide to the lightning impulse and switching impulse testing -Power transformers and reactors.
[5]. IEC 60060-1 (2009), "High-voltage test techniques Part 1: General definitions and test requirements".