Cause investigation of diode rectifier trouble by lightning in traction substation

2016 33rd International Conference on Lightning Protection (ICLP) Pub Date : 2016-09-01 DOI:10.1109/ICLP.2016.7791345

H. Hayashiya, Keiichiro Hanaoka, K. Nishimura, Tomofumi Momose, Hideaki Takizawa, Takehiko Nakamura, Yusuke Yamamoto, Kohei Sakaguchi, S. Yasui

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引用次数: 4

Abstract

On August 17th, 2012, a diode rectifier at Nagano Traction Substation was broken. The broken rectifier was dismantled and investigated in detail and, as a result, it was estimated that the overvoltage caused by the thunder lightning caused the dielectric breakdown in the rectifier. To confirm the assumption of the broken process, the field measurement at Nagano Traction Substation and FDTD (finite-difference time-domain) calculation analysis at Nagoya Institute of Technology were carried out. As a result, it was indicated that the direct lightning to the elevated bridge over the substation caused the transient overvoltage of the grounding system of the substation and resulted in the breakdown within the rectifier. Because the concrete bridge pier is located adjacent to the substation, the surge voltage from the elevated bridge is able to influence on the potential of the substation mesh. In this paper, the investigation process to determine the cause of the trouble will be shown in detail.

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牵引变电所二极管整流器遭雷击故障原因分析

2012年8月17日，长野牵引变电站二极管整流器发生故障。对损坏的整流器进行了详细的拆卸和调查，结果估计是雷电引起的过电压引起整流器的介电击穿。为了验证断裂过程的假设，在长野牵引变电站进行了现场测量，并在名古屋工业大学进行了时域有限差分(FDTD)计算分析。结果表明，对变电站高架桥的直击雷击引起变电站接地系统瞬态过电压，导致整流器内部击穿。由于混凝土桥墩与变电站相邻，高架桥的浪涌电压会对变电站网眼电位产生影响。本文将详细介绍确定故障原因的调查过程。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2016 33rd International Conference on Lightning Protection (ICLP)

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