微电网背景下UPQC鲁棒H_2/H_∞优化控制方法研究  

Study on the Robust H_2/H_∞ Control Method for UPQC in Micorgrid

作　　者：李圣清[1] 罗晓东[1] 李永安[1] 曾黎琳[1] 何政平[1] 

机构地区：[1]湖南工业大学电气与信息学院,湖南株洲412008

出　　处：《湖南大学学报（自然科学版）》2012年第7期54-59,共6页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51077046);湖南省自然科学基金资助项目(09JJ6070);湖南省教育厅重点科研项目(09A022);湖南工业大学研究生创新基金资助项目(CX1113)

摘　　要：由于微电网中的负载、电源类型多变化快,造成大量谐波和电压波动等电能质量问题.为此,本文建立了UPQC统一数学模型,提出了一种基于鲁棒H2/H∞的微电网UPQC优化控制方法.该方法将模型参数的不确定性引入到状态方程中,使得闭环系统对所允许的不确定性同时满足H∞干扰抑制和最优H2性能,把鲁棒H2/H∞控制器的设计转化为具有线性矩阵不等式的优化问题,进而推导出线性动态反馈控制器.理论分析和仿真实验结果表明:该方法具有控制效果好、响应速度快、鲁棒性强等特点.There are a lot of power quality problems such as a large number of harmonics and voltage fluctuations, caused by quickly changing diverse types of loads and power resources in microgrid. An opti- mizing control method based on robust H2/H∞ controllers was proposed by establishing a unified math model of UPQC in micorgrid. The state equation contains the uncertain parameters of the structure, and all allowable uncertainties can meet both the H∞disturbance attenuation and the optimal H2 performances of the closed-loop control system. The design of robust H2/H∞ controller was transformed into an optimal problem with constraints of linear matrix inequalities, from which the robust H2/H∞output feedback con- trollers can be derived. The simulation and experiment results show this method can obtain preferable con- trol effect, fast dynamic response and good robustness.

关 键 词：鲁棒H2/H∞ 线性矩阵不等式 微电网 UPQC 优化控制 

分 类 号：TM714[电气工程—电力系统及自动化]