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

doi:10.11985/2018.06.002

Abstract

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

CLC Number:

TM463

Cui Jian,Wang Juihe. Study of Passivity-Based Control of Buck Converter Based on Optimal Damping Injection[J]. Journal of Electrical Engineering, 2018, 13(6): 7-13.

Figures/Tables 12

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References 7

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参数	数值	参数	数值
U_S/V	24	R/Ω	0.8
U_C^*/V	12	L/mH	0.4
I_L^*/A	15	C/μF	750

参数	数值	参数	数值
种群大小	10	代沟	1
最大遗传代数	20	交叉概率	0.8
个体长度	6	变异概率	0.01

R_a1/Ω	性能指标
R_a1/Ω	σ%	t_r/s	e_ss/V
0.766	23.3	3.5×10^-4	-1
7.513 7	19.3	3×10^-4	0
48	12.3	3×10^-4	0.2

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