Study on Virtual Inertia of DC Microgrid Based on Passivity

doi:10.11985/2021.01.005

Abstract

Abstract:

In order to improve dynamic performance of the converters and the stability of dc bus voltage in DC microgrid, a virtual inertia control strategy based on passivity is proposed. First, based on the port controlled Hamiltonian with dissipation model of the converters, passivity based on current controllers are designed, and then virtual DC machine control is introduced as the voltage outer loop. The simulation results show that the virtual inertia control strategy based on passivity proposed in this paper can better improve the inertia of the DC microgrid. At the same time, compared with the traditional droop control strategy, when the microgrid system is disturbed, the dynamic performance of the converters and the stability of the dc bus voltage are improved, which proves the feasibility of the control strategy proposed in this paper.

Key words: DC microgrid, passivity, virtual inertia, port controlled Hamiltonian with dissipation, virtual DC machine control

CLC Number:

TM461

YANG Jixin, WANG Jiuhe, WANG Zhenye. Study on Virtual Inertia of DC Microgrid Based on Passivity[J]. Journal of Electrical Engineering, 2021, 16(1): 34-41.

Figures/Tables 14

References 19

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参数	数值
源变换器电感L₁/mH	2
源变换器输出电容C₁/μF	2 200
负载变换器电感L₂/mH	1
负载变换器输出电容C₂/μF	1 100
负载电阻R/Ω	50
电源电压u_s/V	200
直流母线电压u_BUS/V	400
负载侧电压u_DC/V	350