Research on Passivity-based Control Strategy of Multi-converter System

doi:10.11985/2022.01.009

Abstract

Abstract:

In the multi-converter system, the interaction between power electronic converters and the constant power load characteristics of the power electronic converters under closed-loop control at the input will affect the stability of the system. At the same time, as the complexity of the multi-converter system increases, system stability analysis and control strategies based on system model are facing challenges. In view of the above problems, passivity-based control (PBC) theory is used to study the control of the multi-converter system from the energy perspective. By ensuring the passivity of the subsystems, the passivity of the entire system is ensured, thereby ensuring the stability of the entire system. In order to achieve a better control effect, the controller is designed with active disturbance rejection control technology. Compared with PI combined with PBC, it has better dynamic and steady-state performance under plug-and-play conditions. Using Matlab/Simulink to build a simulation model of the multi-converter system, the simulation results show the feasibility and superiority of proposed control strategy.

Key words: Multi-converter system, passivity-based control, DC microgrid, active disturbance rejection control

CLC Number:

TM46

WANG Zhenye, WANG Jiuhe, ZHANG Menghao. Research on Passivity-based Control Strategy of Multi-converter System[J]. Journal of Electrical Engineering, 2022, 17(1): 63-70.

Figures/Tables 13

References 16

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变换器	参数	数值
boost源变换器	电感器电感/mH	3.1
boost源变换器	电容器电容/μF	2 000
buck负载变换器	电感器电感/mH	3.2
buck负载变换器	电容器电容/μF	800
boost负载变换器	电感器电感/mH	1.25
boost负载变换器	电容器电容/μF	850
其他	变换器开关频率/kHz	20

变换器	参数	数值
boost源变换器	α	0.5
	β	2
	δ	0.000 3
	r_a1	100
buck负载变换器	α	0.6
	β	2
	δ	0.000 1
	r_a2	70
boost负载变换器	α	0.5
	β	1.5
	δ	0.000 1
	r_a3	70

控制策略	上升时间/s	电压超调量(%)	电压最大变化量/V
控制策略	上升时间/s	电压超调量(%)	恒功率负载变化时	电源电压变化时
PI+PBC	0.016	2	2.5	1.5
ADRC+PBC	0.020	0	0	0