Analysis and Proposition for Malfunction of Electronic Transformer in Intelligent Substation

doi:10.11930/j.issn.1004-9649.2016.02.180.05

Abstract

Abstract: Electronic transformer is very important in smart grid and digital substation. However, experience of manufacturing, operation and corrective maintenance of electronic transformer is still insufficient. After 3 years operation in one intelligent substation, secondary voltages of partial electronic voltage transformers are unstable and secondary currents of partial electronic current transformers has obvious deviation. The structures and principles for electronic transformers system are introduced; the malfunction reasons of equipment are analyzed and studied. It is found that equipment parameters may influence infrared temperature measurement results, shorted energy coil of voltage transformer leads to voltage drop and opening circuit of parallel resistance of current transformer results in current increase. Several suggestions are proposed for design, manufacture, quality control and maintenance of electronic transformers.

Key words: intelligent substation, electronic, voltage transformer, current transformer, malfunction

CLC Number:

TM451

DENG Wei, MAO Juan. Analysis and Proposition for Malfunction of Electronic Transformer in Intelligent Substation[J]. Electric Power, 2016, 49(2): 180-184.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2016.02.180.05

https://www.electricpower.com.cn/EN/Y2016/V49/I2/180

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