CAJ | 학술논문

为了提高具有有源滤波功能的光伏并网(photovoltaic power generation and active filter，PV-AF)系统的动态和静态性能以及稳定性，提出了一种基于H∞和重复控制的PV-AF系统双闭环控制策略。电压外环采用比例积分控制器控制变流器直流侧电压并生成逆变有功电流指令；电流内环采用重复 H∞控制器用于跟随逆变指令电流和并联负载谐波补偿电流指令。与传统的电流环 PI 控制和 PR 控制方法相比，重复 H∞控制器的内模环节提高了电流环跟踪性能，H∞控
위료제고구유유원려파공능적광복병망(photovoltaic power generation and active filter，PV-AF)계통적동태화정태성능이급은정성，제출료일충기우H∞화중복공제적PV-AF계통쌍폐배공제책략。전압외배채용비례적분공제기공제변류기직류측전압병생성역변유공전류지령；전류내배채용중복 H∞공제기용우근수역변지령전류화병련부재해파보상전류지령。여전통적전류배 PI 공제화 PR 공제방법상비，중복 H∞공제기적내모배절제고료전류배근종성능，H∞공
In order to improve performance and stability of the photovoltaic power generation and active filter (PV-AF) system, a dual-loop control strategy based on H∞and repetitive control for PV-AF has been proposed. In the outer voltage loop, PI controller was adopted to track DC voltage commands and generate active power current reference. In the inner current loop, H∞ and repetitive controllers has been applied to follow the active power current reference as well as the harmonic compensation current reference. Compared with traditional PI and PR control method, the internal model of H∞and repetitive controller can improve current tracking performance along with a robustness. This kind of novel method ensures that the power of photovoltaic system injecting grid and the quality of grid currents are improved. The experimental results verify that this control strategy could decrease the steady-state error and enhance the robustness of the system, so as to effectively improve the static and dynamic performance of the system.