摘要
通过理论分析得到特高压多串补系统在不同故障类型及不同故障位置发生电流反向的条件。文章针对我国晋东南-南阳-荆门特高压实际工程,建立了含有多端串联补偿装置的输电线路模型,并推导得出了在线路不同位置处发生不同类型短路故障时的电流表达式,系统地分析了在本段线路及相邻线路发生对称、不对称故障时的电流特性并给出了对应的电流反向条件,为分析特高压系统继电保护动作行为提供了依据。最后,根据特高压工程实际参数,利用PSCAD搭建特高压输电线路模型并进行仿真验证,仿真结果与理论分析一致。
The conditions of current reversal in UHV transmission line with multi-series compensation under different fault conditions are theoretically analyzed. Basing on Jindongnan- Nanyang-Jingmen UHV power transmission project, a multi series compensation system model is established. And then, the analysis formulas of current when different faults occur at different places are deduced. The current characteristics are analyzed when the local line and the adjacent line occur symmetrical or asymmetrical fault. At the same time, the conditions of current reversal are proposed, which is helpful for relay performance analysis of the UHV power system. In the end, based on the parameters of UHV power transmission project, the simulation of 1000kV transmission line with multi-series compensation capacitors based on PSCAD is performed, and simulation results conform to those of theoretical analysis.
出处
《电工技术学报》
EI
CSCD
北大核心
2015年第20期193-198,共6页
Transactions of China Electrotechnical Society
关键词
电流反向
多串补
特高压线路
继电保护
Current reversal, multi series compensation capacitors, UHV transmission line, relay protection
