地线融冰绝缘架设对线路工频短路电流分流影响仿真  

Research on Fault Current Distribution of Insulated Ground Wire in Transmission Line

作　　者：马御棠[1] 王磊 马仪[1] 崔光鑫 

机构地区：[1]云南电网公司电力科学研究院,昆明650217 [2]云南电网公司昭通供电局,云南昭通657000

出　　处：《云南电力技术》2015年第1期113-116,共4页Yunnan Electric Power

摘　　要：为解决输电线路覆冰问题,直流融冰技术在电网得到了广泛的应用。要在避雷线上加融冰电流,避雷线必须采用较大间隙进行绝缘化架设,这将改变输电线路网络结构,对短路电流的分配产生影响。本文以500 k V超高压线路避雷线绝缘化为例,试验分析避雷线绝缘子的电气性能;利用ATP-EMTP仿真软件建立仿真模型,对比仿真分析全线绝缘避雷线和直接接地避雷线工频短路电流分流情况,分析了杆塔接地电阻、杆塔档距、避雷线型号对避雷线分流系数的影响。这将会为满足融冰需要进行地线绝缘化改造和设计提供一定的理论支持和参考。Direct Current（ DC） melting ice is one of the effective measures to solve overhead transmission line icing. Insulated ground wire becomes precondition of DC melting ice. In this paper,the actual insulated ground wire of 500 k V extra high voltage transmission？ line is taken as research object,analyze electrical performance when its insulation by experiment. Using electromagnetic transient analysis program EMTP to establish a line of insulated grounding wire and directly grounding wire transmission line model,simulate lightning line short-circuit current shunt coefficient and discuss the impact of the tower grounding resistance,tower span to grounding wire shunt model coefficients on. It has a certain reference to run and design insulated ground wire,potential＇s increase tower,the economic and rational design of power grid and so on.

关 键 词：直流融冰 绝缘避雷线 避雷线分流系数 短路电流 

分 类 号：TM75[电气工程—电力系统及自动化]