三相四线制APF电流检测方法的研究  

A Research on Three-phase Four-wire APF Current Detection Methods

作　　者：常国祥[1] 马素琦 

机构地区：[1]黑龙江科技大学电气与信息工程学院,黑龙江哈尔滨150022

出　　处：《电气自动化》2015年第3期71-74,共4页Electrical Automation

基　　金：黑龙江省教育厅项目(12531592);博士后资金项目(124103)

摘　　要：我国低压线路大多采用的是三相四线制有源电力滤波器(APF),针对时常因零线引发事故的现象,提出了p-q-o、ip-iq、dq-o等三种用于四线制APF的电流检测方法,使APF不仅可以补偿谐波与无功电流,而且还可以补偿中线电流。并分别建立了MATLAB/Simulink仿真模型。通过对理论和仿真结果的对比分析,得出对于三相电压不对称且有畸变的APF的谐波电流的检测精度最高的是d-q-o法。而p-q-o法只能用在电压对称且无畸变的APF中,ip-iq只能用于对称的APF中。Three-phase four-wire APF （ active power filter） is commonly used on low-voltage lines in China. In view of frequent accidents due to zero line, this paper presents three current detection methods for four-wire APF ：p-q-o, ip-iq and d-q-o which enables APF not only to compensate for harmonic and reactive current, but also for neutral current. MATLAB/simulink models are established respectively. Through comparative analysis of the theoretical and simulation results, it is concluded that the d-q-o method can achieve the highest accuracy in the detection of the harmonic current of the APF with asymmetric three-phase voltage and distortion, while the p-q-o method is only applicable to the APF with voltage symmetry and no distortion and the ip-iq method is only suitable for the symmetric APF.

关 键 词：APF p-q-o法 /p-/q法 d-q-o法 MATLAB/SIMULINK仿真 电流检测 

分 类 号：TM721.2[电气工程—电力系统及自动化] TM933.1