500kV输电线路跳线金具电晕放电特性  

Corona Discharge Characteristics of Jumper Fitting of 500 kV Transmission Lines

作　　者：全姗姗[1] 曹晶[1] 谷莉莉[1] 谢梁[1] 邓杰杰[1] 

机构地区：[1]中国电力科学研究院,湖北武汉430074

出　　处：《水电能源科学》2012年第12期146-148,共3页Water Resources and Power

摘　　要：输电线路相邻耐张段导线之间一般采用跳线方式连接,跳线金具结构复杂,产生的电晕严重。为获得跳线金具的电晕放电特性,利用紫外成像仪对不同结构、安装数量及位置的500kV输电线路跳线间隔棒进行试验,获得了间隔棒的起晕电压值;同时对间隔棒中的线夹结构进行试验,并利用有限元法计算其电场分布。分析结果表明,不同试验方法获得的金具电晕放电特性存在差异,实际应用中应根据工程需要及现场具体情况,选择合适的跳线金具。The adjacent strain conductors of transmission lines are connected with jumper mode. The fitting of jumper has complex structure and it produces severe corona. In order to acquire corona discharge characteristics of jumper fitting, the jumper spacers of 500 kV transmission lines is experimented for different spacing, quantity and position. The corona voltage is obtained with ultraviolet imager apparatus. We also test the line clamps of spacers and the electric field distribu- tion is calculated with finite element method. Analysis results show that corona discharge characteristics of the fitting are different with different test methods. So, it should be selected appropriate jumper fittings on the basis of project require- ment and on-site situation in practical application.

关 键 词：输电线路 电晕放电 跳线 间隔棒 紫外成像仪 有限元法 

分 类 号：TM851[电气工程—高电压与绝缘技术]