带感性负载的Buck-Boost变换器的非线性行为分析及优化控制

龚仁喜; 彭维玉; 王保平; 黎洛琦; 王奇

龚仁喜,彭维玉,王保平,黎洛琦,王奇.带感性负载的Buck-Boost变换器的非线性行为分析及优化控制[J].电测与仪表,2024,61(4):184-191.
Gong Renxi,Peng Weiyu,Wang Baoping,Li Luoqi,Wang Qi.Nonlinear Behaviour Analysis and Optimal Control of Buck-Boost Converter with Inductive Load[J].Electrical Measurement & Instrumentation,2024,61(4):184-191.

带感性负载的Buck-Boost变换器的非线性行为分析及优化控制

Nonlinear Behaviour Analysis and Optimal Control of Buck-Boost Converter with Inductive Load

DOI：10.19753/j.issn1001-1390.2024.04.026

中文关键词: Buck-Boost变换器非线性行为寄生电感对数延迟反馈雅克比矩阵

英文关键词:Buck-Boost converter nonlinear behavior parasitic inductance logarithmic delay feedback Jacobian matrix

基金项目:广西自然科学基金资助项目(2017GXNSFAA198168)；国家自然科学基金资助项目(61561007)

作者中文名	作者英文名	单位
龚仁喜	Gong Renxi	广西大学电气工程学院
彭维玉	Peng Weiyu	广西大学电气工程学院
王保平	Wang Baoping	广西大学电气工程学院
黎洛琦	Li Luoqi	广西大学电气工程学院
王奇	Wang Qi	广西大学电气工程学院

摘要点击次数: 690

中文摘要:

Buck-Boost变换器在某些参数发生变化时呈现出丰富的非线性行为,这些行为会严重影响系统的稳定性,同时使得系统输出的电能质量劣化。本文针对实际变换器的负载特性,深入研究了感性负载条件下Buck-Boost变换器的非线性行为,提出了一种感性负载条件下Buck-Boost系统非线性行为的分析及优化控制方法。该方法首先建立系统的离散迭代模型并求取其雅克比矩阵,并根据矩阵特征值的分布情况判断系统发生非线性行为可能性及类型；然后选取系统的输出延迟值与自身的值作差形成反馈信号,接着使该信号通过比例环节、求和环节和对数环节形成优化控制信号,并以负反馈的形式施加于系统；最后基于稳定判据确定最优控制参数并对系统实施控制。为验证所提方法的有效性,进行了大量的仿真实验,结果表明该方法能很好的抑制系统的非线性行为,扩展系统的稳定边界,改善系统输出的电能质量。

英文摘要:

A Buck-boost converter presents rich nonlinear behaviors when some parameters are changed,which will seriously affect the stability of the system and degrade the power quality of the system output. In this paper, according to the load characteristics of actual converters, the nonlinear behavior of buck-boost converter with an inductive load is deeply studied, and an analysis and optimization control method of nonlinear behaviors of a buck-boost system with an inductive load is proposed. Firstly, the discrete iteration model of the system is established and its Jacobian matrix is obtained. Then, the possibility and type of nonlinear behavior of the system are determined according to the amplitude and distribution of eigenvalues of the matrix. Then, the feedback signal is formed by the difference between the output delay value of the system and its own value, and the signal is made to pass through the proportional link, summation link and logarithmic link so as to form an optimal control signal, and is applied to the system in the form of negative feedback. Finally, the optimal control parameters are determined based on the stability criterion and the system is controlled. In order to verify the effectiveness of the proposed method, a large number of simulation experiments are carried out. The results show that by the proposed method can be well suppressed the nonlinear behavior of the system, extended the stability boundary of the system, and improved the power quality output by the system.

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