基于<em>H</em><sub>∞</sub>控制与最优跟踪控制相结合的三相PWM整流器控制策略

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摘要针对三相PWM整流器的特点, 提出了一种基于H_∞控制与最优跟踪控制相结合的混合控制策略。电流内环, 采用了最优控制策略, 无需解耦;电压外环, 采用H_∞控制策略。基于PWM整流器的数学模型, 建立了满足H_∞控制标准型的状态方程, 并选择合适的权函数。通过求解Riccati不等式, 得到H_∞控制器。由于混合控制器待定参数较多, 计算所得控制器参数难以保证系统运行在最优状态中。本文基于PSO算法, 结合模拟退火以及混沌搜索的优点, 设计了一种改进的PSO算法, 对所设计控制器进行参数整定和优化, 进一步提高了PWM整流器的控制性能, 具有更好的动态性能和抗干扰性。仿真和实验证明了本文所提出方法的可行性和有效性。

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	张辉
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关键词 ： PWM整流器, 最优跟踪控制, H, 控制, PSO

Abstract：This paper proposes a mixfure of H_∞ control and optimal tracking control method for the three-phase PWM rectifier. This paper presents an optimal control for the inner current loop control without decoupling. And a H_∞ control method for the outer voltage loop is proposed. Based on the mathematical model of the PWM rectifier, state equations are established for the standard setup of the H_∞ control problem. Suitable weighting functions are selected for the system. The Riccati inequality is solved to derive the H_∞ control. Because of the underdetermined parameters, the system is hardly to obtain an optimal performance with the calculated parameters of the controller. Based on the particle swarm optimization(PSO)algorithm, an improved PSO algorithm is designed to optimal the parameters of the system with the wonder of the simulated annealing(SA)algorithm and the chaotic search. And then, the performance of PWM rectifier system is better. Simulation and experiment results verify that the proposed control system is suitable and effect for the PWM rectifier.

Key words： PWM rectifier optimal tracking control H control PSO

收稿日期: 2010-11-09 出版日期: 2014-03-20

PACS:

TM461

基金资助:江苏省自然科学基金(bk2009526)和江苏省重大科技成果转化资金项目(BA2008029)资助项目。

作者简介: 张辉男, 1983年生, 博士, 研究方向为鲁棒控制、PWM整流器和永磁电机控制谭国俊男, 1962年生, 博士, 教授, 博士生导师, 研究方向为电力电子、电机控制和风力发电。

引用本文:

张辉, 谭国俊, 钱苗旺, 鱼瑞文. 基于H_∞控制与最优跟踪控制相结合的三相PWM整流器控制策略[J]. 电工技术学报, 2012, 27(12): 102-108. Zhang Hui, Tan Guojun, Qian Miaowang, Yu Ruiwen. Study of Three-Phase PWM Rectifier Based on a Mixture of H_∞ Control and Optimal Tracking Control. Transactions of China Electrotechnical Society, 2012, 27(12): 102-108.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2012/V27/I12/102

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