电气工程学报 ›› 2017, Vol. 12 ›› Issue (11): 1-6.doi: 10.11985/2017.11.001

• •    下一篇

带恒功率负载的Buck-Boost变换器的稳定性研究

宫振杰,王久和   

  1. 北京信息科技大学自动化学院 北京 100192
  • 收稿日期:2017-08-29 出版日期:2017-11-25 发布日期:2017-11-25
  • 作者简介:宫振杰 男 1992年生,硕士研究生,研究方向为带恒功率负载的电能变换器的控制。|王久和 男 1959年生,工学博士,教授,博士生导师,研究方向为电能变换器非线性控制、电能质量控制和微电网等领域。
  • 基金资助:
    国家自然科学基金项目(51477011);国家自然科学基金项目(51777012);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(PXM2017_014224_000025)

Study on the Stability of Buck-Boost Converter with Constant Power Load

Gong Zhenjie,Wang Jiuhe   

  1. Beijing Information Science & Technology University Beijing 100192 China
  • Received:2017-08-29 Online:2017-11-25 Published:2017-11-25

摘要:

本文利用无源性研究带恒功率负载的Buck-Boost变换器稳定性问题。恒功率负载的负阻抗特性使Buck-Boost变换器输入阻抗实部负定,使变换器为非无源的,可导致其不稳定。对此,本文设计了一种基于端口受控的耗散哈密顿模型的无源控制器,使Buck-Boost变换器输入阻抗实部由负定变为正定,保证了变换器无源性和稳定性,进而可实现变换器具有好的稳态和动态性能。仿真结果表明,无源控制器可保证带恒功率负载的Buck-Boost变换器无源性和稳定性,并使变换器具有优秀的稳态和动态性能。

关键词: Buck-Boost变换器, 恒功率负载, 端口受控的耗散哈密顿模型, 无源控制器

Abstract:

In this paper, the stability of buck-boost converter with constant power load (CPL) is studied by passivity. Owing to the character of negative of CPL, the real part of input impedance of the Buck-Boost convertor is negative definite and non-passive, which can make the convertor unstable. In order to make the real part of the input impedance of the Buck-Boost converter changes from negative definite to positive one, a passivity based controller based on port controlled Hamiltonian with dissipation (PCHD) is designed to ensures the passivity and stability of the convertor, and then convertor has the good steady-state and dynamic performance. Simulation result shows that the passivity based controller can ensure the passivity and stability of the Buck-Boost with CPL, and the convertor has the good steady-state and dynamic performance.

Key words: Buck-Boost converter, constant power load, the model of port controlled Hamiltonian with dissipation, passivity based controller

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