邻近直流导线时交流电晕电流脉冲特性试验

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摘要本文搭建交直流并行线路电晕放电试验平台,研究邻近直流电压时交流单点电晕放电下的电晕电流脉冲特性。并对交流电晕电流脉冲的分布模式、重复频率以及波形等特征参数进行统计分析。试验结果表明,邻近的正极性直流电压会促进交流负半周电晕放电而抑制交流正半周电晕放电,邻近的负极性直流电压作用正好相反。直流电压对交流负半周电晕电流脉冲波形参数无明显影响,而正半周电晕电流脉冲的幅值会随负极性直流电压的增加有所升高。同时发现,随着交流电压幅值的升高,促使其正半周发生电晕放电所需要的负极性直流电压幅值也相应地升高,并基于电晕放电的发展过程中电离强度的计算提出种子电子的缺失是造成该现象的原因。最后,在电晕放电离子云模型基础上,提出脉冲序列发展的过程中电离区域电场强度恒定不变的假设,从而对邻近直流电压影响下的交流电晕电流脉冲波形参数特性给出了合理的解释。

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	王振国
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关键词 ：交流电晕放电, 电晕电流脉冲, 交直流并行, 直流电压, 种子电子

Abstract：In this paper, a parallel AC-DC conductor corona discharge platform was built to investigate the characteristics of AC corona current pulses produced by single discharge point under the influence of adjacent DC voltages. The distribution pattern, repetition frequency and waveform parameters of the AC corona current pulses were systematically analyzed. Experimental results show that the adjacent positive DC voltage has a respective promotion and inhabitation effect on the AC corona discharge corresponding to the negative and positive half cycles, and vice versa for the adjacent negative DC voltage. No obvious effects were observed on the waveform of negative half circle corona current pulses. While for the positive half cycles, the corona current pulse amplitude increases slightly with the adjacent negative DC voltage. Furthermore, it was found that the adjacent negative DC voltage to promote the existence of positive half circle corona discharge becomes higher with the increase of AC voltage, and it was explained as the lack of seed electrons based on the calculation of ionization intensity. Finally, the assumption that the electric field in the ionization zone in the development of corona is constant was proposed to interpret the almost no effects of adjacent DC voltages on the parameters of the AC corona current pulse waveform.

Key words： AC corona discharge corona current pulses AC-DC parallel DC voltage seed electron

收稿日期: 2016-04-26 出版日期: 2017-03-01

PACS:

TM726.1

基金资助:国家自然科学基金（51177041）和高等学校学科创新引智计划（“111”计划）（B08013）资助项目

通讯作者: 王振国男,1989年生,博士研究生,研究方向为输电线路电磁环境。E-mail: wangzhenguo1229@163.com

作者简介: 卢铁兵男,1970年生,教授,博士生导师,研究方向为输电线路电磁环境。E-mail: tiebinglu@ncepu.edu.cn

引用本文:

王振国, 卢铁兵, 王东来. 邻近直流导线时交流电晕电流脉冲特性试验[J]. 电工技术学报, 2017, 32(4): 170-179. Wang Zhenguo, Lu Tiebing, Wang Donglai. Experiment of AC Corona Current Pulses When Adjacent to DC Conductor. Transactions of China Electrotechnical Society, 2017, 32(4): 170-179.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2017/V32/I4/170

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