高电压技术2011，Vol.37Issue(5)：1203-1215,13.
雷电流波形参数检测视角下±800kV直流输电线路导线绕击分析
Electromagnetic Analysis of Shielding Failure in ±800 kV DC Transmission Line in the Aspect of Acquiring Lightning Parameters
摘要
Abstract
Lightning at rise time contains most information of lightning waveform parameters. In order to analyze the information of lightning current at rise time in different traveling channels, the distributed resistance circuit theory was adopted to study the response of direct lightning strokes for acquiring lightning parameters and to analyze the traveling wave under the situation of lightning disturbance and flashover. The response of shielding failure causing flashover could be regarded as two impulses at different time in very short time-domain. The flashover occurring time was distributed at the rise time and the tail time of the lightning wave, and the transient currents in distinct traveling channels were utilized to analyze the lightning information in them. The effect of corona and tower grounding devices were thus considered. The analysis illustrates that the lightning information varies at flashover rise time and tail time of the lightning wave, the current of the insulator does not contain information of lightning rise time parameters, the transient current of line does not contain the amplitude of lightning when flashover occurs at rise time but contains the amplitude of lightning when flashover occurs at tail time. Then in order to obtain the accurate lightning parameters, the line currents around the lightning stroke point should be required.关键词
±800kV/直流输电线路/雷电绕击/冲击电晕/绝缘子伏秒特性/波前闪络/波后闪络Key words
±800 kV/ DC transmission line/ shielding failure/ impulsive corona/ insulator volt-time curve/ flashover at rise time/ flashover at tail time分类
信息技术与安全科学引用本文复制引用
束洪春,曹璞璘,张广斌,张斌,杨毅,刘可真..雷电流波形参数检测视角下±800kV直流输电线路导线绕击分析[J].高电压技术,2011,37(5):1203-1215,13.基金项目
国家自然科学基金(50977039 （）
50847043 （）
90610024 （）
50467002 （）
50347026). （）
