高压输电线路的稳定运行与电网的安全可靠息息相关。雷击跳闸严重影响着高压输电线路的可靠运行，破坏电网的稳定。为降低成都电网高压输电线路的雷击跳闸率，确保成都电网的稳定运行，以成都电网高压输电线路2005—2014年的雷击跳闸事故为例，统计分析其雷击跳闸规律，研究造成输电线路雷击跳闸的主要原因，并得到以下结论：成都地区输电线路雷击故障主要集中在岷江—沱江源山区、沱江—龙泉山交界区及成都城乡结合部等区域；成都电网雷电易击区的形成原因与杆塔所处的地理位置及杆塔本身的耐雷水平有关；针对不同的雷电易击区，采取相应的防雷措施，能有效降低高压输电线路的雷击跳闸率。%The stable operation of HV transmission line has close relations to the safety and reliability of power grid .The trip-ping caused by lightning stroke has severe effects on the reliable operation of HV transmission lines , and it can destroy the sta-bility of power grid .In order to reduce the lightning trip -out rate of HV transmission lines in Chengdu power grid and to guar-antee its stable operation , taking the tripping accidents caused by lightning stroke of HV transmission lines in Chengdu power grid from 2005 to 2014 for example , the tripping rules of these transmission lines are analyzed , and the main reasons for light-ning stroke tripping are studied .The results show that the areas which are easily struck by the lightning are Minjiang -Tuo-jiang source mountainous area , Tuojiang-Longquan mountain junction , rural-urban fringe zone and so on .The reasons of these lightning attachment areas relate to the geographic position and lightning withstand level of towers .Aiming at different lightning attachment areas , the corresponding methods should be adopted to reduce the lightning trip -out rate of HV transmis-sion lines efficiently .
展开▼
