基于扰动功率小波奇异熵的电压暂降源定位  

Voltage Sag Source Location Based on Wavelet Singular Entropy of Disturbance Power

作　　者：张培新 徐方维[1] 龙晨瑞 郑鸿儒 徐琳 ZHANG Peixin;XU Fangwei;LONG Chenrui;ZHENG Hongru;XU Lin(College of Electrical Engineering,Sichuan University,Chengdu 610065,China;State Grid Sichuan Electric Power Research Institute,Chengdu 610072,China)

机构地区：[1]四川大学电气工程学院,四川成都610065 [2]国网四川电科院,四川成都610072

出　　处：《智慧电力》2022年第10期30-36,44,共8页Smart Power

基　　金：国家自然科学基金资助项目(51877141)。

摘　　要：针对现行的电压暂降源定位方法在含有变压器以及复杂电网结构场景下准确度较低的问题,提出一种基于扰动功率小波奇异熵的电压暂降源定位法。首先,基于电能质量监测仪采集到电压电流波形数据计算得到瞬时有功和无功功率,获得加权瞬时扰动有功功率和无功功率;然后,通过小波变换,奇异值分解,结合信息熵原理得到扰动功率的小波奇异熵值,由小波奇异熵值的大小来确定电压暂降扰动源的相对位置;最后,仿真和实例分析证明了所提方法的有效性和准确性。To address the problem of low accuracy in existing voltage sag source location method under the conditions of transformer and complex power grid structure,the paper proposes a voltage sag source location method based on the wavelet singular entropy of disturbance power.Firstly,the instantaneous active power and reactive power is calculated based on the voltage and current waveform data collected by power quality monitor,and weighted instantaneous disturbance active power and reactive power is obtained.Then the wavelet singular entropy value of the disturbance power is obtained by using wavelet transform and singular value decomposition combined with information entropy principle,and the relative position of voltage sag disturbance source is determined by the magnitude of the wavelet singular entropy value.Finally,the effectiveness and accuracy of the proposed method is verified trough the simulation and example analysis.

关 键 词：小波奇异熵 电压暂降 暂降源定位 扰动功率 

分 类 号：TM714[电气工程—电力系统及自动化]