特高压同塔双回线路融冰装置感应电压分析  

Analysis on Induced Voltage of Deicer for UHV Double-Circuit Transmission Line on the Same Tower

作　　者：郭志冲 陆佳政[2] 余占清[1] 谭艳军[2] 何金良[1] 胡军[1] 李波[2] 张红先[2] 

机构地区：[1]电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系),北京市海淀区100084 [2]湖南省电力公司科学研究院,湖南省长沙市410007

出　　处：《电网技术》2013年第11期3015-3021,共7页Power System Technology

基　　金：国家自然科学基金项目(50907036);国家重点基础研究发展计划项目(973计划)(2011CB209403)~~

摘　　要：使用融冰装置的同塔双回特高压输电线路对其中一回进行停运融冰时,由于线路之间的静电耦合和电磁感应效应,另一回运行线路会在融冰装置处产生感应电压、电流,影响设备的安全。基于Bergeron模型搭建1 000 kV同塔双回线路直流融冰仿真模型,分析了融冰装置端口的感应电压,并分别计算了线路电气量、几何参数以及接线方式对感应电压的影响。计算结果表明:融冰装置感应电压随运行线路电流提高而明显增大,受线路电压变化影响较小;感应电压与线路长度呈正相关关系,回线间水平距离对感应电压影响显著;不同的接地方式感应电压不同;线路换位对融冰装置端口处感应电压的影响可以忽略。When a deicer is used to melt the ice on one of double circuit transmission lines on the same tower, which is in outage condition, the induced voltage and current on the deicer will be caused by the another transmission line being operated due to the electrostatic coupling and electromagnetic induction effect between transmission lines and the induced voltage and current affect the safety of the deicer. Based on Bergeron model a simulation model of deicing 1 000 kV double circuit transmission lines on the same tower is constructed; the induced voltage at the terminals of the deicer is analyzed; the impacts of electrical quantities, geometrical parameters and connection modes of transmission line on the induced voltage are calculated respectively. Calculation results show that the induced voltage on the deicer obviously increases with the increase of the current of the transmission line being operated and the voltage variation of the transmission line being operated slightly impacts the induced voltage on the deicer;there is a positive correlation relationship between the induced voltage on the deicer and the length of the transmission line;the horizontal distance between the two transmission lines impacts the induced voltage greatly;the induced voltages under different grounding modes are not the same;the impact of line transposition on induced voltage at the terminals of the deicer can be neglected.

关 键 词：融冰装置 1000kV同塔双回线路 Bergeron仿真模型 感应电压 

分 类 号：TM755[电气工程—电力系统及自动化]