Prediction on Corona Onset Voltage of DC Conductors and Valve Hall Fittings
Qiu Zhibin1, Ruan Jiangjun1, Huang Daochun1, Shu Shengwen2, Du Zhiye1
1. School of Electrical Engineering Wuhan University Wuhan 430072 China; 2. Electric Power Research Institute of State Grid Fujian Electric Power Co. Ltd Fuzhou 350007 China
Abstract：Corona onset voltage is the basis of corona control in HVDC transmission projects. A new method based on electric field features and support vector machine (SVM) is proposed to predict the corona onset voltage. The negative DC corona onset voltages of conductors were predicted, and the results were compared with those from the experiments and the existing methods. Thus, the effectiveness and superiority of the proposed method were validated. Then, the corona onset voltages of shielding spheres in a ±660kV DC converter station valve hall were measured and predicted. The electric field control values without corona on shielding spheres were obtained. By comparing with the electric field numerical results calculated by finite element method, it was proved that corona would not incept on the valve hall shielding spheres. This method supplies a new possible way to predict corona onset voltages of conductors and valve hall fittings in HVDC transmission projects.
邱志斌, 阮江军, 黄道春, 舒胜文, 杜志叶. 直流导线和阀厅金具的电晕起始电压预测[J]. 电工技术学报, 2016, 31(12): 80-89.
Qiu Zhibin, Ruan Jiangjun, Huang Daochun, Shu Shengwen, Du Zhiye. Prediction on Corona Onset Voltage of DC Conductors and Valve Hall Fittings. Transactions of China Electrotechnical Society, 2016, 31(12): 80-89.
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