特高压电晕笼直流分裂导线正极性电晕起始特性分析

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Abstract In order to study the corona onset characteristic of the positive conductor in the UHV corona cage, the charge simulation method is applied to calculate the space electric field and corona onset voltage of the stranded conductor in the corona cage. Each strand is simulated by 8 space charges, based on the corona sustainable criterion in extreme uneven electric filed and the secondary emission process of the photoelectrons. The corona loss test of the single aluminum cable steel reinforced (LGJ)900-75, 6*LGJ900-75, 8*LGJ400-35 conductors in dry and rain conditions is done in the UHV corona cage, and the chosen rain rate are 2.4mm/h, 20mm/h and 30mm/h. The tangent line method is used to determine the test corona onset voltage, and the comparative study proves that the calculation model can be used to calculate the positive corona onset voltage of the bundle conductors in the UHV corona cage. A further analysis shows that: the positive corona onset voltage increases with the bundle number, and decreases with the bundle space and also increases with the diameter of the sub -conductor; the surface irregularity coefficient decreases with the rain rate, while at the same time, it tends to be saturated.

Key words： UHV corona cage bundle conductor charge simulation method positive corona onset voltage rain rate

Received: 02 November 2011 Published: 27 November 2013

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TM855

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	Liu Yunpeng
	Zhu Lei
	Lü Fangcheng
	Xie Xiongjie
	You Shaohua

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Liu Yunpeng,Zhu Lei,Lü Fangcheng等. Analysis of the Positive Corona Onset Characteristic of the Bundle Conductors in the UHV Corona Cage[J]. Transactions of China Electrotechnical Society, 2013, 28(1): 73-79.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2013/V28/I1/73

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