输电线路雷电屏蔽模拟试验研究综述  

Review of Experimental Study on Lightning Shielding Performance of Transmission Line

作　　者：安韵竹[1,2] 胡元潮[1] 文习山[2] 姜志鹏 蓝磊[2] 王羽[2] 鄂盛龙 

机构地区：[1]山东理工大学电气与电子工程学院,山东淄博255000 [2]武汉大学电气工程学院,武汉430072 [3]鄂州供电公司,湖北鄂州436000

出　　处：《高压电器》2016年第7期1-9,18,共10页High Voltage Apparatus

摘　　要：输电线路雷电屏蔽模拟试验是研究输电线路雷电屏蔽性能最为直接有效的手段。文中从国内外输电线路雷电屏蔽模拟试验的研究现状出发,分别对缩比试验模型合理性、缩比模型导线接地方式、工作电压和施加电压极性4个方面进行理论分析和探讨。分析认为缩比试验模型与原系统应尽量在几何尺寸和物理参数具有相似性,推荐采用短波头操作冲击电压波进行大尺寸真型塔模拟试验;初步研究了导线接地方式对棒—缩比导线50%放电电压的影响,认为可通过光学观测等方式,研究缩比模型导线接地方式对放电过程的影响机理,这为今后输电线路雷电屏蔽性能试验研究奠定理论基础;缩比导线上工作电压的模拟方式应根据线路的具体类型而有所不同,指出交流线路宜采用三相同时施加电压;应施加不同电压极性,根据雷电屏蔽模拟试验结果为特高压输电线路雷电屏蔽性能设计提供参考和依据。Experimental study is an effective and useful method to research lightning shielding performance of transmission lines directly. Research actuality on tests of lightning shielding performance of transmission lines is described rationality conductor, roughly in this paper. Theoretical analysis and investigation is conducted on view of g aspects, including of scaled model test, grounding method of scaled conductor, operating voltage applied to scaled and polarity of applied voltage to simulate lightning. Practical tests with scaled model should be geometrically and physically consistent with original system. Therefore, it is to propose in this paper that switching impulse with short wave front is proposed to large-scaled transmission line model. Preliminary study conducted in this paper indicates that there＇ s a significant influence on the 50% discharge voltage of rod-conductor air gaps with the conductor grounded or not. Optical observation can be employed to research on the mechanism of grounding method＇s influence on discharge process, to build a theoretical basis for future study. Operating voltage applied to scaled conductor should be different for DC and AC transmission lines. Different polarities of applied voltage to simulate lightning should be employed in simulation test, and comparison should be conducted to have the one with a smaller shielding scope, which will provide references and basis for lightning shielding performance of UHV transmission lines.

关 键 词：雷电屏蔽 模拟试验 缩比模型 接地方式 电压极性 工作电压 

分 类 号：TM863[电气工程—高电压与绝缘技术]