基于单基频交叉S变换的电压凹陷源定位  

Voltage Sag Source Location Based on Single Fundamental Frequency Cross S-Transform

作　　者：杨晓芳[1] 易吉良[1] 程焰[1] 周曼[1] 刘小文[1] YANG Xiaofang;YI Jiliang;CHENG Yan;ZHOU Man;LIU Xiaowen(School of Electrical and Information Engineering,Hunan University of Technology,Zhuzhou Hunan 412007,China)

机构地区：[1]湖南工业大学电气与信息工程学院,湖南株洲412007

出　　处：《湖南工业大学学报》2017年第3期40-47,共8页Journal of Hunan University of Technology

基　　金：国家自然科学基金资助项目(61503131);湖南省教育厅科学研究基金资助项目(14C0327)

摘　　要：电压凹陷扰动源相对于监测点的精确定位,有助于明确供用电双方的责任。为了精确定位电压凹陷扰动源,提出了一种基于单基频交叉S变换的扰动功率定位方法。首先,将监测点采集到的电压、电流信号进行单基频S变换,得出电压、电流的基频复向量;然后,将电压、电流基频复向量经单基频交叉S变换后,求模提取瞬时视在功率,进而求得瞬时视在扰动功率;最后,利用扰动功率判据实现对电压凹陷扰动源的定位。通过对由短路故障、异步电动机启动、变压器励磁涌流以及故障自清除引起的4种典型的电压凹陷源进行建模仿真,对8个监测点进行分析判断,结果证明了所提出方法的准确有效性。The precise location of voltage sag disturbance source relative to monitoring site helps to clarify theaccountability of the responsibility either by the customers or the suppliers.In order to precisely locate the voltagesag disturbance source,a new location method of disturbance power has been proposed based on single fundamentalfrequency cross S-transform.First,the voltage and current signals,which are collected by the monitoring sites,aretransformed by single fundamental frequency cross S-transform,thus obtaining the fundamental vectors of the voltageand current.Next,with the fundamental vectors of voltage and current transformed by single fundamental frequencycross S-transform,the instantaneous apparent power can be extracted from the model,and the instantaneous apparentdisturbance power can be obtained.Finally,locate the source of voltage sag disturbance by adopting the disturbancepower criterion.An analysis has been made of the short circuit fault,induction motor starting and transformer inrushcurrent and fault clearance of four typical voltage sag source due to modeling and simulation,as well as the eightmonitoring points,which result verifying the accuracy and effectiveness of the proposed method.

关 键 词：单基频交叉S变换 扰动功率 电压凹陷 定位 

分 类 号：TM714[电气工程—电力系统及自动化]