变电站10kV进线保护段研究  

Study on 10 kV Lead-in Line Protection Section in Substations

作　　者：张山 陈维江[2] 李成榕[3] 王晓刚[2] 颜湘莲[2] 杨玉昆 

机构地区：[1]茂名供电公司,广东省茂名市525000 [2]中国电力科学研究院,北京市海淀区100085 [3]华北电力大学 电气与电子工程学院,北京市昌平区102206

出　　处：《电网技术》2007年第1期71-74,共4页Power System Technology

摘　　要：为降低变压器遭受变电站中、低压侧出线近区大短路电流冲击的概率,文章提出了10kV进线保护段的构想,给出了进线保护段的构成：对10kV进线在不同布置、不同导线截面下短路电流的沿线分布进行了仿真计算,以确定进线保护段长度：计算分析了采用10kV进线保护段对变电站雷电侵入波过电压的影响,结果表明装设进线保护段前后变压器的雷电过电压水平无明显变化。To reduce the surge probability of transformer windings incurred by heavy short-circuit current occurred in the near zones of medium- and low-voltage feeding lines, the authors propose the conception of 10 kV lead-in line protection section and give its construction. The distribution of shortcircuit currem along the lines under typical line configurations and various conductor cross-sections are simulated to determine the length of lead-in line protection section; the influence of adopting 10 kV lead-in line protection section on lightning intruded-wave over-voltage is calculated and analyzed, results show that there is no evident change of lightning over-voltage of transformers before and after the lead-in line protection sections are equipped.

关 键 词：变电站 进线保护段 绝缘导线 带间隙金属氧化物避雷器 雷电侵入波过电压 

分 类 号：TM63[电气工程—电力系统及自动化] TM863