基于H_∞回路成形的动态电压恢复器鲁棒控制  

H∞Loop Shaping Based Robust Controller of Dynamic Voltage Restorer

作　　者：刘牛[1] 姚钢[1] 周荔丹[1] 李立学[2] 郑益慧[2] 高蓉[3] 张甫 韩越[3] 

机构地区：[1]上海交通大学电力传输与功率变换控制教育部重点实验室,上海200240 [2]上海交通大学电工与电子技术中心,上海200240 [3]上海市电力公司市区供电公司,上海200080

出　　处：《电工技术学报》2012年第9期48-53,共6页Transactions of China Electrotechnical Society

基　　金：国家高新技术研究发展计划(863计划)(2008AA04Z129);国家自然科学基金(60504010)资助项目

摘　　要：考虑到反馈系统中测量互感器的高频域噪声、系统模型的摄动性(典型的在高频域)、负荷的干扰以及执行装置的饱和,对动态电压恢复器的鲁棒性提出了要求。本文在标准反馈系统上采用回路成形方法。首先选择前置和后置补偿器将标称受控对象的奇异值成形为期望的开环形状,再利用正规化互质因式摄动系统的鲁棒镇定控制器来构成最终的控制器。当控制器复杂时,可利用频率加权Hankel范数近似方法对控制器进行降价处理,得到满足鲁棒性要求的简单控制器。该控制器用于动态电压恢复器系统控制,可以实现系统性能和鲁棒稳定性之间的折中。仿真结果验证了控制器设计的正确性。Taking into account the high-frequency domain transformer noise, system model perturbation（typically in the high frequency domain）, load disturbance and actuator saturation in the feedback system, system robustness requirement is needed for the dynamic voltage restorer（DVR）. In this paper, loop shaping method is utilized in the standard feedback system to realize the robust design. Firstly, the pre- and post-compensation are selected to make the singular values of the nominal controlled system become the desired open-loop gain. Then the robust stabilization controller of the normalized coprime-type perturbed system is designed to be the final controller. When the controller is complex, the frequency-weighted Hankel norm approximation method is adopted to obtain a simple controller, which meets the robustness requirements. So the controller of DVR can achieve a compromise result between robust stability and system performance. Finally simulation results show that controller is effective and feasible.

关 键 词：反馈系统 电压跌落 回路成形 鲁棒性 

分 类 号：TM712[电气工程—电力系统及自动化]