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特高压多串补系统电流特性分析

, PP. 193-198

Keywords: 电流反向,多串补,特高压线路,继电保护

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Abstract:

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。

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