用局部放电幅度估计发电机定子绕组击穿电压的方法的开发与验证

IF 0.4 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Electrical Engineering in Japan Pub Date : 2025-01-06 DOI:10.1002/eej.23489

Shin Nakamura, Masaki Kanegami, Takashi Kuraishi, Satoru Miyazaki

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引用次数: 0

摘要

在发电机定子绕组绝缘诊断中，对线圈进行抽样调查，估算定子绕组的介电强度。以往的研究依赖于从线圈击穿电压平均值的3σ值来推断定子绕组的击穿电压。然而，当样本量较小时，这种传统方法的估计误差较大。因此，我们提出了一种基于局部放电幅度最大值和样品线圈击穿电压最小值来估计定子绕组击穿电压的方法。我们通过蒙特卡罗模拟验证了该方法的有效性。

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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Development and Validation of Estimation of Breakdown Voltage of Stator Windings of Generator From Partial Discharge Magnitude

For the insulation diagnosis of stator windings of generators, sampling surveys are conducted on the coils to estimate the dielectric strength of the stator winding. Previous research has relied on inferring the breakdown voltage of the stator winding from the value 3σ away from the mean value of the breakdown voltage of the coil. However, this conventional method exhibits a significant estimation error when the sample size is small. Therefore, we propose a method for estimating the breakdown voltage of the stator winding based on the maximum value of the partial discharge magnitude and the minimum value of the breakdown voltage of the sample coil. We verify this method by Monte Carlo simulation assuming a sampling survey of coils.

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来源期刊

Electrical Engineering in Japan 工程技术-工程：电子与电气

CiteScore

0.80

自引率

0.00%

发文量

审稿时长

4-8 weeks

期刊介绍： Electrical Engineering in Japan (EEJ) is an official journal of the Institute of Electrical Engineers of Japan (IEEJ). This authoritative journal is a translation of the Transactions of the Institute of Electrical Engineers of Japan. It publishes 16 issues a year on original research findings in Electrical Engineering with special focus on the science, technology and applications of electric power, such as power generation, transmission and conversion, electric railways (including magnetic levitation devices), motors, switching, power economics.