基于对称分量法的混合型电力有源滤波器研究
摘要：针对光伏并网发电系统中非线性负载带来的谐波问题，以及大量单相非线性负载接入后的三相电力系统严重不对称情况，提出一种新型混合型滤波器主电路结构和基于应用改进的对称分量法的有源滤波器控制方法。首先，建立混合型滤波器的主电路结构，分析有源部分的拓扑结构和无源部分的工作模式及零序电抗。接着，给出该滤波器的锁相环控制电路以及整体硬件控制结构。针对三相负载严重不对称情况，采用改进对称分量法精确提取中线侧零序电流分量，实现滤波器有源部分的控制。最后，通过仿真验证与现场应用，验证了该混合型滤波器及控制方法在三相负载对称和严重不对称情况下的有效性，结果表明其具有明显的滤波效果及较优的经济性。
Abstract:To address the harmonic issues caused by nonlinear loads in photovoltaic grid-connected power generation system, as well as the serious asymmetry of three-phase power system resulting from numerous single-phase nonlinear loads, a new hybrid filter main circuit structure and an active filter control method are proposed based on the application of improved symmetrical component method. In this paper, the main circuit structure of the hybrid filter is established, and an analysis is conducted on the topology of the active part, together with the working mode and zero-sequence reactance of the passive part. After that, the PLL control circuit and the overall hardware control structure of the filter are given. In view of the serious asymmetry of three-phase load, the improved symmetrical component method is employed to accurately extract the zero-sequence current component at the neutral side, so as to realize the control over the active part of the filter. Finally, the effectiveness of the hybrid filter and control method in the case of three-phase load symmetry and serious asymmetry is verified through simulation and field application, which demonstrates superior filtering effect and good economy.
标题：基于对称分量法的混合型电力有源滤波器研究
英文标题：Research on Hybrid Active Power Filter Based on Symmetrical Component Method
作者：赵长伟, 郑文兵, 顾丹珍, 杨得博, 李广敏, 沈佳星,
关键词：混合型滤波器, 三次谐波, 谐波治理, 控制策略, 对称分量法,
发表日期：2024-10-10
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