基于改进扰动功率和能量法的暂态扰动定位

功率和能量法是一种定位电能质量扰动问题的常用方法，但它在定位向系统注入能量的扰动类型时，会发生原理性错误。文中对此进行了改进，提出一种基于改进功率和能量法的暂态扰动定位方法。改进法结合了扰动初始能量的极值和扰动初始电压的极值，使其可以同时处理向系统注入能量的扰动和系统释放能量的扰动。改进方法不需要在定位前对暂态扰动进行分类，就可以对2类暂态扰动进行准确的定位。对比仿真分析表明，改进方法达到了准确定位2类暂态扰动的目的。

Transient Disturbances Location Based on Improved Disturbance Power and Energy

The disturbance power and energy based method is commonly used to locate the transient disturbances. When detecting the types of transient disturbance injecting energy into system, it gives theoretic wrong results. An improved method based on disturbance power and energy is presented to locate the transient disturbances. The improved method considers the initial values of both the disturbance power and disturbance voltage, which can locate the transient disturbances absorbing energy from system or injecting energy into system at the same time. Before classifying the transient disturbances, this method can locate the two kinds of transient disturbances correctly. Simulation results show that the improved method achieves the objective of locating the two kinds of transient disturbances correctly.