三相三线制系统中零序谐波对谐波检测的影响  

Effect of neutral harmonic current on detection of harmonic currents in three-phase three-wire systems

作　　者：廖志凌[1] 刘国海[1] 薜文平[1] 

机构地区：[1]江苏大学电气信息工程学院,江苏镇江212013

出　　处：《江苏大学学报（自然科学版）》2005年第3期266-269,共4页Journal of Jiangsu University：Natural Science Edition

基　　金：江苏省自然科学基金资助项目(BK95109504);江苏大学青年自然科学基金资助项目(JDQ03012)

摘　　要：在介绍应用高通滤波器和低通滤波器两种谐波电流检测电路的基础上,针对在三相三线制电路中选择对称三相方波电流作为仿真模型时,应用高通滤波器的谐波电流检测电路不能得到方波电流的全部谐波电流成分,没有包含其中的高频零序谐波电流分量的问题,根据电路具体特点作适当改进,在谐波检测结果中补偿零序电流.利用科学计算软件Matlab进行计算机仿真研究,理论分析和仿真结果证明了该方法的正确性.Two circuits systems of harmonic current detection by applying high pass and low pass filters are introduced. When symmetrical three-phase square wave currents are selected as simulation model in a three-phase three-wire system, the harmonic current detecting circuit applying high pass filter can not detect all of the harmonic currents of square wave, and its high frequency neutral harmonic currents can not be included. According to the characteristic of the circuit, the neutral harmonic currents are compensated in the harmonic current detecting results. With the help of MATLAB software, computer simulation studies are made. The theoretical analysis and simulation results prove the proposed method to be correct.

关 键 词：电力系统 谐波检测 高通滤波器 低通滤波器 

分 类 号：TM743[电气工程—电力系统及自动化]