有源电力滤波器的状态误差PCH控制与仿真研究  

Control and Simulation of Active Power Filter Based on the State Error PCH Control Principle

作　　者：刘方正[1] 于海生[1] 

机构地区：[1]青岛大学自动化与电气工程学院,山东青岛266071

出　　处：《青岛大学学报（工程技术版）》2017年第3期98-103,共6页Journal of Qingdao University(Engineering & Technology Edition)

基　　金：国家自然科学基金项目(61573203;61573204)

摘　　要：为减少电力系统网侧电流谐波并提高电网电能质量,本文采用状态误差端口受控哈密顿控制方法,实现对三相三线制有源电力滤波器的补偿电流实时控制和直流侧电压恒定控制。在dq旋转坐标系下,建立有源电力滤波器的PCH状态平均数学模型,构建了期望的闭环状态误差PCH系统,并根据系统的设计目标确定了系统期望平衡点;根据能量成形原理求出期望的闭环哈密顿PCH函数,并依据阻尼和互联配置设计了APF控制器。同时,运用比例积分控制(proportional integral control,PI)方法设计控制器,确保直流侧母线电压恒定。为了验证该控制策略的合理性,采用Matlab/Simulink软件进行仿真分析。仿真结果表明,基于状态误差PCH控制方法的有源电力滤波器对谐波起到了很好的抑制作用;在APF直流侧母线电压趋于恒定情况下,经过APF补偿的电力系统网侧电流中的谐波含量大大降低,达到控制目标,具有良好的稳态和动态控制性能。该研究具有一定的应用价值。Base on a control method of the state error Port-Controlled Hamiltonian（PCH） systems, real-time compensation current control and constant dc voltage control of three-phase and three-wire Active Power Filter are realized in this paper. Firstly, the PCH state average mathematical model of active power filter is given in DQ rotating coordinate system, and the expected closed-loop state error PCH system is constructed. According to the design goal of the system, the desired equilibrium point of the system is determined. The desired Hamil-tonian function is chosen based on the energy-shaping theory. The controller is designed through interconnec-tion and damping assignment. At the same time, the proportional integral control （PI） method is used to design the controller to ensure the DC bus voltage constant. The simulation results show that the system achieves the desired control objectives and has good steady-state and dynamic control performance.

关 键 词：有源电力滤波器 能量成形 哈密顿系统 状态误差 脉宽调制 

分 类 号：TM761[电气工程—电力系统及自动化]