基于EDS算法识别电压暂降的研究

Research for Identifing Voltage Sag Based on EDS Algorithm

电压暂降是电力系统中常见的一种电气故障。本文针对电网中经常发生的电压暂降的情况,通过对实际中的电力系统中的电压暂降故障与正常运行时候的电压进行采集,并应用欧氏距离平方(EDS)算法对两种情况下的数据进行计算,统计出不同情况下即所得到的欧氏距离平方值的范围,同时比较一下大小。经过对大量的电压暂降情况进行计算比较,结果表明,发生电压暂降情况下,欧氏距离平方值要明显大于正常情况下的值,而且该算法步骤少,计算速度快,能够达到快速、准确检测电压暂降故障的目的。

Voltage sag is a common electrical fault in power system. For the case of the grid voltage sag oc-curring frequently, through the acquisition of practical voltage data of power system under voltage sag faults and normal running, the paper applies the Euclidean distance squared （EDS） algorithm to calculate both cases, carries out a statistical analysis and makes a comparison. After the process, the results show that when a voltage sag oc-curs, the Euclidean distance squared value is greater than that under normal circumstances significantly. Further-more, the algorithm has fewer steps and faster speed, which can detect the voltage sag faults fast and accurately.