民用电网谐波电流检测方法及仿真研究  

Detection and simulation of harmonic current in civilian power grid

作　　者：陶洪浩[1] 刘惠康[1] 张帅[1] 

机构地区：[1]武汉科技大学信息科学与工程学院,湖北武汉430081

出　　处：《武汉科技大学学报》2013年第6期473-477,共5页Journal of Wuhan University of Science and Technology

摘　　要：针对民用电网中存在的电压不稳、三相不平衡和中线电流大等问题,在传统的ip-iq法基础上,采用对称分量法和零序电流分离法研究电流中的零序分量问题,并结合PI调节器建立数学模型对其谐波、基波负序和零序电流进行了实时检测。结果表明,该方法可准确地检测出电网电流中含有的谐波、基波负序和零序电流,且检测精度高、实时性好。In light of the problems of voltage instability, three phase imbalance and big neutral current in civilian power grid, this study, on the basis of the traditional ip-iq method, used the symmetrical component method and the zero sequence current separation method to study zero sequence component problems in the current. Aided by PI regulator, it established a mathematical model to detect real time the harmonic current, fundamental negative sequence, and zero sequence current in the civilian power grid. Simulation results with the MATLAB software show that this method can accurately de- tect the grid current containing harmonics, fundamental negative sequence and zero sequence current and boast high precision and good real time.

关 键 词：民用电网 中线电流 谐波 对称分量法 零序电流分离法 PI调节器 

分 类 号：TM714.3[电气工程—电力系统及自动化]