750kV同塔双回线路接地开关的选择  

Selection for grounding switch of 750 kV double circuit transmission line on the same tower

作　　者：刘硕 杜晨昭 

机构地区：[1]宁夏回族自治区电力设计院,宁夏银川750001

出　　处：《宁夏电力》2014年第5期9-12,22,共5页Ningxia Electric Power

摘　　要：针对沙湖750kV输变电工程中银川东-沙湖同塔双回路线间耦合较强的问题,利用电磁暂态分析软件ATP-EMTP建立仿真模型并对同塔双回线路的感应电压和感应电流进行了计算,结合IEC标准和接地开关订货技术条件,提出了本工程接地开关的参数要求。计算和分析结果表明:对于长距离、大传输容量且装设有高压并联电抗器的750kV同塔双回线路,静电感应电压和电磁感应电流有可能会超过B类开关限值,这两个参数对线路两端接地开关选型起主导作用。In light of coupling stronger between double circuit line on same tower from Yinchuan East to Shahu in Shahu 750 kV transmission and transformation project,builds simulation model with electromagnetic transient analysis software calculates induced vlotage and induced current on double circuit line on same tower. Through analysis results and combining with IEC standard and order goods technique condition of grounding switch,puts forward parameter demand on grounding swithch of the project. The results show that for 750 kV double circuit line on same tower with long distance,large transmission capacity and installed high voltage shunt reactor,static induced voltage and electromagnetic induced current may surpass limiting value of B type,the two parameters play a leading role in grounding switch type selection on both ends of transmission line.

关 键 词：同塔双回线路 电磁耦合 感应电压 感应电流 接地开关 

分 类 号：TM743[电气工程—电力系统及自动化]