侯纪勇,徐志军,程政,李鸿路,史锋,朱小利,魏远
HOU Jiyong,XU Zhijun,CHENG Zheng,LI Honglu,SHI Feng,ZHU Xiaoli,WEI Yuan

• 1:国家电网有限公司特高压建设分公司
• 2:中国电力工程顾问集团西北电力设计院有限公司

摘要(Abstract)：

我国西北地区海拔高、空气稀薄，调相机升压变压器套管本体、带电部位与各接地体之间的空间较小，安全距离裕度小，容易发生雨闪事故。针对该问题，分析闪络发生原因，研究套管结构型式、安装等方面存在的不足，提出优化套管安装方式、加装辅助伞裙、增大套管与各接地体之间距离等防雨闪措施。采用Comsol Multiphysics有限元仿真软件，建立降雨条件下变压器电场仿真模型，研究套管与接地体之间的防雨闪距离，并提出相关优化措施。经实际工程验证，所提措施可大幅降低套管发生雨闪事故的概率，保障调相机安全稳定运行。
Northwest China is characterized by its high altitude and thin air. The small clearing between the bushings, the charged parts, the grounding bodies of the regulator step-up transformer, and the small safety margin may result in rain flashover. To this end, this paper analyzes the causes of flashover, studies the shortcomings of the bushing structure type, installation and other aspects, and proposes rain flashover protection measures such as optimizing bushing installation, installing auxiliary sheds, increasing the clearings between bushings and grounding bodies. Comsol Multiphysics, a finite element simulation software, is used to establish an electric field simulation model of transformer under raining conditions to study the rain flashover protection clearing between the bushing and the grounding body. The paper also proposes the corresponding optimization measures. The engineering verification shows that the proposed measures can significantly reduce the probability of rain flashover in the bushing and ensure the safe and stable operation of the synchronous condenser.

关键词(KeyWords)： 调相机;升压变压器;雨闪;电场仿真;优化措施
synchronous condenser;step-up transformer;rain flashover;electric field simulation;optimization measures

Abstract:

Keywords:

基金项目(Foundation): 国家电网有限公司特高压建设分公司科技项目（国网特高压技术[2021]62号）

作者(Author): 侯纪勇,徐志军,程政,李鸿路,史锋,朱小利,魏远
HOU Jiyong,XU Zhijun,CHENG Zheng,LI Honglu,SHI Feng,ZHU Xiaoli,WEI Yuan

DOI: 10.19585/j.zjdl.202304011

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