Effect of lightning impulse prestress on AC partial discharge characteristics in cast resin transformer

被引：0

作者：

Maruyama H. ^{[1
]}

Matsuo K. ^{[1
]}

Kozako M. ^{[1
]}

Hikita M. ^{[1
]}

Iida K. ^{[2
]}

Umemura T. ^{[2
]}

Nakamura Y. ^{[3
]}

Nakamae T. ^{[4
]}

Maeda T. ^{[4
]}

Higashiyama M. ^{[4
]}

机构：

[1] Kyushu Institute of Technology, 1-1, Sensuicho, Tobata-ku, Kitakyushu

[2] Mie University, 1577 Kurimamachiya-cho, Tsu

[3] Power and Industrial Systems Research and Development Center, TOSHIBA Co., Ltd., 1 Toshiba-machi, Fuchu

[4] TOSHIBA Industrial Products and Systems Co., Ltd., 2121 Nao, Asahi-cho, Mie-gun, Mie

来源：

IEEJ Transactions on Fundamentals and Materials | 2018年 / 138卷 / 08期

关键词：

Ac partial discharge inception voltage; Cast resin transformer; Lightning impulse voltage pre-stress; Partial discharge;

D O I：

10.1541/ieejfms.138.422

中图分类号：

学科分类号：

摘要：

It is crucial for cast resin transformer to detect void and delamination existing in the cast resin because these defects reduce insulation performance of cast resin equipment. Furthermore, defects are likely to be mixed in cast resin because of several surface boundaries between resin and conductor. It is considered that detecting partial discharge (PD) is effectiveness to diagnose equipment of power equipment. However, it is reported that withstand lightning impulse voltage test may give influence on AC partial discharge test, especially partial discharge inception voltage (PDIV). This paper deals with accumulated charge in a void under AC voltage to investigate the effect of the impulse voltage pre-stress on subsequent ac PD characteristics in cast resin transformer. AC PD characteristics were compared before and after impulse application. In addition, recovery of PD characteristics was measured to investigate charge decay. As a result, the mechanism of pre-stress effect is revealed and surface charge density is estimated quantitatively in cast resin transformer. © 2018 The Institute of Electrical Engineers of Japan.

引用

页码：422 / 427

页数：5

共 7 条

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