【摘要】 提出一种基于扰动有功电流方向的电压暂降源定位方法。通过电网故障的分析,得到电网故障过程中扰动有功电流变化的规律,分析结果表明扰动有功电流的流向可准确确定电网各种故障源点的方向。以此作为电压暂降源定位的依据,给出了扰动有功电流的算法和电压暂降源定位判据。仿真实验测试证明,该电压暂降源定位方法能准确定位由各种电网故障引起的电压暂降,也能正确定位其他扰动源(如大电机起动引起的电压暂降),尤其在不对称电压暂降时,优于现有的电压暂降源定位方法。更多还原

【Abstract】 A new voltage sag source locating method is proposed in this paper which is based on the direction of the disturbance active current. By analyzing power system faults,which is the main reason causing voltage sags,the direction of the disturbance active current has been found to be a good indicator of the sag source location. The algorithm for calculating the disturbance active current and the criterion for voltage sag source location are presented respectively. The simulation tests show that the proposed method has a high effectiveness in voltage sag source location caused by all kinds of faults. The new method can also be used tolocate other disturbance sources,e. g. large motor starting,and has superiority over existing methods for asymmetric sags.更多还原