两种基于瞬时功率理论的单相电路谐波电流检测方法的比较研究

基于三相电路瞬时无功功率理论的单相电路谐波电流检测方法(延时最短的方法2)和基于单相电路瞬时功率理论的单相电路谐波电流检测方法都是基于瞬时功率理论的有源电力滤波器谐波电流检测方法,而后者比前者简单许多.为了弄清楚后者的检测性能,根据这两种方法的MATLAB仿真模型,建立了对它们的检测性能进行比较的MATLAB仿真模型.在此基础上,对它们进行了仿真比较.比较发现:在电源电压无畸变时,当负载电流处于稳定状态时,后者的检测精度略低于前者,而当负载电流处于变化状态时,这两种方法都能够平滑地跟踪基波有功电流幅值,它们的动态响应时间无明显差别;在电源电压发生畸变时,后者的检测精度明显地低于前者;在电源频率发生变化时,后者的检测精度明显地高于前者.

Comparison Research on Two Harmonic Current Detection Methods of Single-phase Circuit Based on Instantaneous Power Theory

The harmonic current detection method of single-phase circuit based on the instantaneous reactive power theory of three-phase circuit(the method 2 which has the shortest time delay) and the harmonic current detection method of single-phase circuit based on the instantaneous power theory of single-phase circuit are two harmonic current detection methods for active power filter based on instantaneous power theory,and the latter is much simpler than the former.For the sake of making clear the latter's detectio...