一种基于虚拟阻抗的HAPF谐振抑制方法  

HAPF Resonance Suppression Method Based on Virtual Impedance

作　　者：高敏 杨磊[1] 杨家强[1] GAO Ming;YANG Lei;YANG Jiaqiang(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学电气工程学院,浙江杭州310027

出　　处：《电工技术》2020年第15期33-36,共4页Electric Engineering

摘　　要：针对HAPF系统中无功补偿电容FC易与电网阻抗发生谐振影响谐波治理和系统稳定问题,提出一种基于虚拟阻抗的谐振抑制方法,采集PCC点电压构建了谐振抑制阻尼函数,使之等效为并联在FC两端的阻抗,使系统的谐振频率始终大于补偿的谐波频率,不仅可实现较高的谐波补偿精度,而且可提高系统的稳定性。最后在一台30 kVA的HAPF平台上对所提出的方法进行了试验验证,试验结果表明了该方法的有效性。Aiming at the problem that the reactive compensation capacitor FC in the HAPF system is liable to resonate with the grid impedance to affect the harmonic control and system stability,a method of resonance suppression based on virtual impedance was proposed.The resonance damping function was constructed by collecting the voltage at the PCC point,making it equivalent to the impedance in parallel across the FC,so that the resonance frequency of the system was always greater than the compensated harmonic frequency,which not only achieved higher harmonic compensation accuracy,but also improve the stability of the system.Finally,the proposed method was experimentally verified on a 30 kVA HAPF platform,and the experimental results showed the effectiveness of the method.

关 键 词：有源电力滤波器 虚拟阻抗 谐振抑制 有源阻尼 

分 类 号：TM732[电气工程—电力系统及自动化]