基于基波电压检测的并联型有源电力滤波器设计  

Shunt Active Power Filter Design Based on Fundamental Voltage Detection

作　　者：代灿 李沁 陈坤燚 曾伟 赵国军 DAI Can;LI Qin;CHEN Kunyi;ZENG Wei;ZHAO Guojun(College of Intelligent Systems Science and Engineering,Hubei Minzu University,Enshi 445000,China)

机构地区：[1]湖北民族大学智能科学与工程学院,湖北恩施445000

出　　处：《湖北民族大学学报（自然科学版）》2022年第4期469-474,共6页Journal of Hubei Minzu University:Natural Science Edition

基　　金：国家自然科学基金项目(61963014);湖北省教育厅科学技术研究计划项目(B2019092);湖北民族大学高水平科研成果校内培育项目(PY21004).

摘　　要：针对当前有源电力滤波器谐波检测误差降低滤波效果和容量大的问题,提出一种基于基波检测实现有效滤波的并联型有源电力滤波器设计方法.该方法基于等效虚拟阻抗原理设计,无需谐波检测,只需进行基波检测,通过控制逆变器输出,使基波等效阻抗无穷大的同时满足谐波虚拟阻抗近似为零的要求,将谐波电流导入滤波器支路,实现负载侧滤波.通过建立数学模型,分析了谐波虚拟阻抗调节计算的原理和方法,并通过仿真实难验证了该方法的有效性.结果表明,该方法可将网侧电流THD降低到0.52%,谐波抑制效果良好,且在电网频率波动(±0.5 Hz)情况下适应性强,另外,该有源电力滤波器不输出电流,无需考虑容量问题.Aiming at the problem that the harmonic detection error of active power filter reduces the filtering effect and large capacity,this paper proposes a design method of shunt active power filter based on fundamental wave detection to realize effective filtering.This method,based on the design principle of equivalent virtual impedance,does not need harmonic detection,but only fundamental wave detection.By controlling the output of the inverter,the equivalent impedance of the fundamental wave is infinite and the virtual impedance of the harmonic is approximately zero.The current is introduced into the filter branch to realize load-side filtering.This paper analyzes the principle and method of harmonic virtual impedance adjustment calculation by establishing a mathematical model,and verifies the effectiveness of the method through simulation.The results show that this method can reduce the THD of grid-side current to 0.52%,and the harmonic suppression effect is good,and the adaptability is strong under the grid frequency fluctuation(±0.5 Hz).In addition,as the active power filter does not output current,there is no need to consider its capacity.

关 键 词：并联型有源电力滤波器 谐波抑制 基波检测 谐波阻抗 虚拟阻抗 

分 类 号：TN713.8[电子电信—电路与系统]