特高压换流站大尺寸典型电极起晕特性的仿真与试验  

Simulation and Experimental Study on Corona Characteristics of Large Size Typical Electrodes Used in UHV Converter Station

作　　者：刘鹏[1] 郭伊宇 吴泽华 张炜 谢梁 Liu Peng;Guo Yiyu;Wu Zehua;Zhang Wei;Xie Liang(State Key Laboratory of Electrical Insulation and Power Equipment Xi’an Jiaotong University,Xi’an 710049 China;Pinggao Group Co.Ltd,Pingdingshan 467000 China;State Key Laboratory of Power Grid Environmental Protection China Electric Power Research Institute,Wuhan 430074 China)

机构地区：[1]电力设备电气绝缘国家重点实验室(西安交通大学),西安710049 [2]平高集团有限公司,平顶山467000 [3]中国电力科学研究院有限公司电网环境保护国家重点试验室,武汉430074

出　　处：《电工技术学报》2022年第13期3431-3440,共10页Transactions of China Electrotechnical Society

基　　金：国家电网公司总部科技项目资助(5500-201947423A-0-0-00)。

摘　　要：为确保特高压换流站均压屏蔽装置设计合理可靠,提出用于一种分析复杂电场环境下大尺寸典型电极起晕特性的三维仿真计算方法,并开展大尺寸球、环电极电晕试验进行试验验证。试验结果表明,所提出的计算方法能够有效计算特高压换流站大尺寸典型电极表面起晕电场强度,预测值与试验值的相对误差范围在-2.6%~3.4%之间。该文分析并验证了均压环等效半径经验公式,获得该公式适用的均压环管径与环径范围。研究成果可为大尺寸电极起晕电场强度预测、换流站均压屏蔽金具设计提供参考和依据。To ensure the reliable design of the shielding device in UHV converter stations, a three-dimensional method to analyze corona onset characteristic of large size shielding devices was proposed in the paper. The corona test is carried out with large size sphere and ring electrodes, and the test results show that the method this paper proposed can effectively predict the corona onset E-field strength on the surface of large-size typical electrodes in UHV converter stations, and the relative error between the prediction value and the experimental value is between-2.6% and 3.4%.The empirical formula for equivalent radius of grading ring is analyzed and verified, which the scope of the formula about pipe diameter and ring diameter is determined. The research can provide basis for the prediction of the corona onset electric strength of the large size electrodes and the design of the shielding devices.

关 键 词：特高压 大尺寸电极 电晕试验 起晕电场强度 

分 类 号：TM854[电气工程—高电压与绝缘技术]