±800 kV与±500 kV同塔双回输电线路同塔架设可行性分析  

Feasibility Analysis of Building Double-Circuit Transmission Lines on theSame Tower with ±800 kV and ±500 kV

作　　者：桂亮 张永奈 张金锋 李浩 汪银龙 GUI Liang;ZHANG Yongnai;ZHANG Jinfeng;LI Hao;WANG Yinlong(Anhui Mingsheng Electric Power Investment Group Co.,Ltd.,Hefei 230022,China;State Grid Anhui Electric Power Co.,Ltd.,Hefei 230022,China;Construction Branch of State Grid Anhui Electric Power Co.,Ltd.,Hefei 230022,China;State Grid Tongling Power Supply Company,Tongling 244001,China)

机构地区：[1]安徽明生电力投资集团有限公司,安徽合肥230022 [2]国网安徽省电力有限公司,安徽合肥230022 [3]国网安徽省电力有限公司建设分公司,安徽合肥230022 [4]国网铜陵供电公司,安徽铜陵244001

出　　处：《电工技术》2023年第11期194-196,200,共4页Electric Engineering

摘　　要：与其他较低电压等级输电线路相比,特高压输电线路正常运行电流增大了几倍,短路电流更是高达十几到数十倍。当共走廊输电线路中某回线路停运检修时,电磁耦合作用使得运行线路在停运检修线路上感应出较大的电压和电流,严重威胁输变电设备和检修人员的安全;当运行线路发生单相接地故障时,共走廊输电线路间电磁耦合作用使得故障点潜供电流和恢复电压增大,电弧不易熄灭,严重影响了电力系统保护装置重合闸的成功率。鉴于此,分析了±800 kV与±500 kV同塔双回输电线路同塔架设可行性。Compared with other transmission lines with lower voltage level,the normal operating current of UHV transmission lines is increased several times,and the short-circuit current is as high as ten to dozens of times.When a circuit of a common corridor transmission line is out of operation for maintenance,electromagnetic coupling makes the operating line sense a large voltage and current on the out-of-service maintenance line,which seriously threatens the safety of transmission and substation equipment and maintenance personnel.When single-phase ground fault occurs on operating lines,the electromagnetic coupling between common corridor transmission lines increases the latent current at the fault point and the recovery voltage,and the arc is not easy to extinguish,which seriously affects the success rate of power system protection device reclosure.In view of this,the feasibility of building double-circuit transmission lines on the same tower with±800 kV and±500 kV is analyzed.

关 键 词：特高压输电线路 同塔双回 同塔架设 

分 类 号：TU756[建筑科学—建筑技术科学]