摘要
针对有源滤波器电流谐波分量检测复杂,且在非线性负载变化时出现电源电流畸变的现象,基于非线性控制理论,从能量平衡关系出发,提出了新型的有源滤波器控制方法。利用本质上是非线性反馈的无源性控制(PBC)策略,实现直流侧电容电压的补偿控制,在非线性负载时变未知情形下,确保系统稳定的同时,实现谐波电流的精确计算与跟踪。基于此,将PBC方法与自适应控制相结合,实现线路参数与负载变化时参考谐波电流的准确跟踪,并有效抑制由电阻、电感变化引起的跟踪误差。该方法从能量角度分析并联型有源滤波器的控制系统,确定不必抵消的"无功力",设计全局定义的控制律,具有形式简单、无奇异点、鲁棒性好等特点。基于dSPACE的实验结果证明了该控制策略的有效性。
Due to its great potential value in applications and theory, nonlinear control strategies of active filters, especially passivity-based control （PBC） methods, have been a focus in the literature. The main purpose is to develop a control algorithm that forces the three-phase shunt active filter to track reference harmonic current trajectories with time-varying load. To achieve this, an adaptive PBC method is developed. The key point with this method is the identification of terms, known as workless forces, which appear in the dynamic equations of active filter but do not have any effect on the energy balance equation of the closed loop. PBC combined with adaptive control scheme not only reserves the advantages of PBC such as nonexistence of singularity, but also repressed the harmonic current tracking error caused by resistance and inductance variation. This leads to a simple control structure and enhances the robustness of the control system. The reasonability and validity is testified by the experimental results based on dSPACE.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2007年第25期114-118,共5页
Proceedings of the CSEE
基金
国家重点基础研究发展计划项目(973项目)(2005CB221505)
高等学校博士学科点专项科研基金(20050248058)~~
关键词
无源性控制
有源电力滤波器
自适应控制
谐波
电流检测
passivity-based control
active power filter
adaptive control
harmonic current detection
作者简介
薛花（1979-），女，博士研究生，研究方向为有源滤波与谐波补偿技术，xuehua@sjtu．edu．cn
姜建国（1956-），男，教授，博士生导师，研究方向为电力电子与电力传动。
