摘要
通过对抽蓄机组的重要性以及抽蓄机组国内研究现状分析,结合传统发电机线棒表面电位研究成果,本文采用有限元对抽蓄线棒进行建模,仿真分析不同电压幅值、频率、防晕长度、主绝缘厚度等对抽蓄线棒表面电位的影响,为验证仿真计算的准确性,采用表面电位测量系统对不同电压下线棒表面电位进行了测量。结果表明线棒低阻防晕层(未与铁心直接接触区域)表面电位随电压呈线性变化;表面电位随频率的增加而增大;随着低阻防晕长度的增加,防晕末端的电位较高,可能导致低阻防晕层过热;表面电位随主绝缘厚度的增加而降低。相关结果为抽蓄线棒绝缘优化设计提供理论参考。
Through the analysis of the importance of pump-storage generator and the domestic research status of pump-storage generator,combined with the research results of the surface potential of the traditional generator stator bar,this paper uses finite element method to model the pump-storage bar,and simulates and analyzes the influence of different voltage amplitude,frequency,anti-corona length,main insulation thickness,etc.on the surface potential of the pump-storage bar,in order to verify the accuracy of the simulation calculation,The surface potential measurement system was used to measure the surface potential of the bar under different voltages.The results show that the surface potential of the outer corona protection layer(not in direct contact with the stator core)of the bar changes linearly with the voltage;The surface potential increases with the increase of frequency;With the increase of the length of outer corona protection layer,the potential at the end of outer corona protection layer is higher,which is easy to cause overheating of the outer corona protection layer;The surface potential decreases with the thickness of the main insulation.The relevant results provide a theoretical reference for the optimal design of the bar insulation of pump-storage generator.
作者
张小俊
杨帅
张根博
刘雁
谢志辉
刘江俊
张跃
何福优
ZHANG Xiaojun;YANG Shuai;ZHANG Genbo;LIU Yan;XIE Zhihui;LIU Jiangjun;ZHANG Yue;HE Fuyou(Dongfang Electric Machinery Co.,Ltd.,618000,Deyang,Sichuan,China)
出处
《东方电气评论》
2024年第1期29-32,共4页
Dongfang Electric Review
关键词
抽水蓄能发电电动机
线棒
表面电位
电压
幅值
主绝缘
pumped storage generator
bar
surface potential
voltage
amplitude
main insulation
