Simulation and Experimental Study on Corona Characteristics of Large Size Typical Electrodes Used in UHV Converter Station
Liu Peng1, Guo Yiyu1, Wu Zehua1, Zhang Wei2, Xie Liang3
1. State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong University Xi'an 710049 China; 2. Pinggao Group Co. Ltd Pingdingshan 467000 China; 3. State Key Laboratory of Power Grid Environmental Protection China Electric Power Research Institute Wuhan 430074 China
Abstract 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.
Liu Peng,Guo Yiyu,Wu Zehua等. Simulation and Experimental Study on Corona Characteristics of Large Size Typical Electrodes Used in UHV Converter Station[J]. Transactions of China Electrotechnical Society, 2022, 37(13): 3431-3440.
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2022, Vol. 37 
