CAJ | 학술논문

为了充分了解和掌握1000 kV东线工程-安徽至上海输变电工程沿线走廊雷电分布特征及雷电参数,满足线路防雷设计和今后运行需要,采用网格法对安徽、江苏、浙江和上海电网雷电定位系统2005～2008年地闪主放电资料进行统计分析,绘制了东线上程穿越的4省市的雷区分布图,标出了多雷区.进而以东线线路走廊为对象,将全线按0.1°×0.1°分成63个统计段,采用线路走廊网格法统计分析了沿线每段的地闪密度N_g、雷电日T_d和线路走廊雷电流幅值分布特征,结果表明东线特高压沿线地闪密度均大于现行行标推荐值.用统计值对该特高压线路绕击闪络率进行了校核计算,找出了易受雷击并可能发生闪络的易闪段,~#1段及位于皖南山区和浙北西部的~#27～~#51段为全线易击段,~#1,~#27～~#30、~#43～~#50为易闪段,在实际地形下部分区段利用行标参数得到的绕击闪络率偏小.研究结果已被1000 kV皖电东送输变电工程差异化防雷设计所采用.
위료충분료해화장악1000 kV동선공정-안휘지상해수변전공정연선주랑뇌전분포특정급뇌전삼수,만족선로방뢰설계화금후운행수요,채용망격법대안휘、강소、절강화상해전망뇌전정위계통2005～2008년지섬주방전자료진행통계분석,회제료동선상정천월적4성시적뢰구분포도,표출료다뢰구.진이이동선선로주랑위대상,장전선안0.1°×0.1°분성63개통계단,채용선로주랑망격법통계분석료연선매단적지섬밀도N_g、뇌전일T_d화선로주랑뇌전류폭치분포특정,결과표명동선특고압연선지섬밀도균대우현행행표추천치.용통계치대해특고압선로요격섬락솔진행료교핵계산,조출료역수뢰격병가능발생섬락적역섬단,~#1단급위우환남산구화절북서부적~#27～~#51단위전선역격단,~#1,~#27～~#30、~#43～~#50위역섬단,재실제지형하부분구단이용행표삼수득도적요격섬락솔편소.연구결과이피1000 kV환전동송수변전공정차이화방뢰설계소채용.
In order to master the lightning activity distribution characteristic and lightning parameters of the 1000 kV east-line project-Anhui-Shanghai transmission line to meet its lightning protection design and future operation needed,based on cloud-to-ground flash data of Anhui,Jiangsu,Zhejiang and Shanghai during 2005～2008 detected by lightning location system(LLS),lightning density distribution map of the four provinces and cities through by the 1000kV UHV AC transmission line are drawn according to grid method,and the zones easy to get lightning stroke are labeled.After that,aiming at the UHV transmission line,line corridor grid method is adopted to analyze the lightning activity distribution characteristics along the UHV transmission line.According to the method,the UHV line is divided into 63 statistical sections with 0.1°× 0.1°each grid and those sections are labeled as ~#1～~#63 respectively from west to east.Some important lightning parameters such as cloud-to-ground flash density N_g,thunderstorm days per year T_d and cumulative probability of lightning current magnitude P(＞I)in each statistical grid along the corridor are analyzed.The results show that the value of flash densities along the corridor are larger than the standard value of density commanded in current electric criterion in China (DL/T 620-1997).Further,the statistical lightning parameters along the corridor are used in lightning protection calculation to revise the value of shielding failure flashover rate (SFFOR),and the weak sections easy to flashover of the UHV transmission line are found out on the basis of synthesis of these parameters.The results show that ~#1,~#27～~#51 are weak sections easy to get stoke,while ~#1,~#27～~#30、~#43～~#50 are weak sections easy to flashover,and under actual various terrains condition,the SFFOR calculated with standard lightning parameters commended in current electric criterion is smaller than that with real statistical lightning parameters in some sections.The research results have been used in ongoing lightning protection design of the system.