直流导线和阀厅金具的电晕起始电压预测

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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.

Key words： DC corona corona onset voltage conductors valve hall fittings electric field features support vector machine

Received: 06 August 2015 Published: 12 July 2016

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TM85

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	Articles by authors
	Qiu Zhibin
	Ruan Jiangjun
	Huang Daochun
	Shu Shengwen
	Du Zhiye

Cite this article:

Qiu Zhibin,Ruan Jiangjun,Huang Daochun等. Prediction on Corona Onset Voltage of DC Conductors and Valve Hall Fittings[J]. Transactions of China Electrotechnical Society, 2016, 31(12): 80-89.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I12/80

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