Testing analysis of dielectric loss and capacitance of ultra-high voltage capacitive voltage transformer

doi:10.11930/j.issn.1004-9649.2012.4.38.3

Abstract

Abstract: The measuring of dielectric loss and capacitance of capacitive voltage transformer is important for equipment insulation level. The test on ultra-high voltage 1 000 kV capacitive voltage transformer is different than other transformers. The method to measure two different structural 500 kV CVT is systematically introduced. Furthermore, a new test method of 1 000 kV CVT is proposed according to particular feature of 1 000 kV CVT. The method use external standard capacitor, internal high voltage and positive connection to measure C2 capacitor of CVT. The test results meet standards of UHV AC pilot project hand-over regulations according to the on-site test, which proves the validity of proposed method.

Key words: capacitor voltage transformer, dielectric loss, capacitance, self-excitation method

CLC Number:

TM451⁺.2

SU Chen-yun, HUANG Zhen. Testing analysis of dielectric loss and capacitance of ultra-high voltage capacitive voltage transformer[J]. Electric Power, 2012, 45(4): 38-41.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2012.4.38.3

https://www.electricpower.com.cn/EN/Y2012/V45/I4/38

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