基于瞬时无功功率理论的谐波电流检测滤波器探讨

Effect of Harmonic Detection Power Filter Based on Instantaneous Reactive Power Theory

基于瞬时无功功率理论基础上谐波电流检测模型的研究,应用MATLAB中的SIMULINK建立仿真电路,对仿真电路中谐波电流检测的滤波器电路效果进行比对和探讨。结果表明:选择HPF或LPF、以及滤波器的阶数和截止频率、对检测电路的动态响应时间、检测精度都有很大影响。仿真研究的结论对谐波检测电路设计有积极意义。

This study compares and analyzes the efficacy of filter circuit for harmonic detection used in the simulation circuit. Based on the research of harmonic circuit detection model by applying instantaneous reactive power theory, this study uses the Simulink of MATLAB to build simulation circuit. Experiment shows that the selection of HPF or LPF, the order of filter and the cut-off frequency all have great impact on the dynamic respond time and detection accuracy of the detection circuit. Significant simulation result helps the design of harmonic detecting circuit.