电气工程学报 ›› 2018, Vol. 13 ›› Issue (6): 7-13.doi: 10.11985/2018.06.002

• 理论研究 • 上一篇    下一篇

基于最优阻尼注入的Buck变换器无源控制研究

崔健,王久和   

  1. 北京信息科技大学自动化学院 北京 100192
  • 收稿日期:2018-01-22 出版日期:2018-06-25 发布日期:2018-06-25
  • 作者简介:崔 健 男 1993年生,硕士研究生,主要从事电能变换器系统稳定性方面的研究工作。|王久和 男 1959年生,教授,博士生导师,主要从事电能变换器非线性控制、电能质量控制及微电网等方面的研究工作。
  • 基金资助:
    国家自然科学基金项目(51777012/51477011);北京市自然科学基金重点项目(KZ201511232035);北京市高创计划教学名师项目(PXM 2017_014224_000025)

Study of Passivity-Based Control of Buck Converter Based on Optimal Damping Injection

Cui Jian,Wang Juihe   

  1. Beijing Information Science & Technology University Beijing 100192 China
  • Received:2018-01-22 Online:2018-06-25 Published:2018-06-25

摘要:

针对目前Buck变换器无源控制器中确定的阻尼注入DI不能使变换器获得好的控制性能的问题,本文提出了一种计算并优化DI的方法。首先,建立了无源控制器控制的Buck变换器系统传递函数,在阶跃输入情况下求系统的输出电流响应及其超调量,通过校正系统电流响应的超调量,最终确定DI的取值范围。在所确定的DI取值范围内,使用遗传算法对DI进行优化,求得最优DI。基于最优DI的无源控制器,可使Buck变换器具有优秀的性能。计算机仿真结果表明,本文提出的基于最优DI的无源控制策略是可行的。

关键词: Buck变换器, 无源控制, 最优阻尼注入, 遗传算法

Abstract:

Presently, the damping injection of passivity-based controller of Buck converter can’t make converter acquire excellent performance. Aiming at this problem, an approach is proposed which can be used to calculate and optimize damping injection in the paper. Firstly, the transfer function of the Buck converter system based on passivity-based controller is established, the output current and its overshoot of the system is found when input is step, and finally the range of value of the damping injection is decided by correcting overshoot of the output current response. The damping injection is optimized by using genetic algorithm and the optimal damping injection is obtained. The Buck converter can get excellent performance due to passivity-based controller based on optimal damping injection. The simulation results prove the feasibility of the passivity-based control based on optimal damping injection proposed in this paper.

Key words: Buck converter, passivity-based control, optimal damping injection, genetic algorithm

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