A Virtual Inertia Method for Stability Control of DC Distribution Systems with Parallel Converters

Qun Gao, Yan Jiang (), Ke Peng and Lei Liu
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Qun Gao: School of Business, Shandong University of Technology, Zibo 255000, China
Yan Jiang: School of Electrical and Electronic Engineering, Shandong University of Technology, Zibo 255000, China
Ke Peng: School of Electrical and Electronic Engineering, Shandong University of Technology, Zibo 255000, China
Lei Liu: School of Electrical and Electronic Engineering, Shandong University of Technology, Zibo 255000, China

Energies, 2022, vol. 15, issue 22, 1-21

Abstract: DC distribution systems are a typical power electronic system with low inertia, low-rotational kinetic energy, and poor antidisturbance capability when loads fluctuate or parameters change. In this paper, a virtual inertia control with an additional first-order filtering link is proposed on the basis of P - U dc droop control. The results of the simulations and experiments verify that the additional inertia control reduces the voltage change rate and improves the system inertia by adjusting the virtual capacitance value on the DC side of the converter, which can achieve a smoother and more accurate voltage control and suppress the continuous voltage oscillation.

Keywords: DC distribution systems; virtual inertia control; first-order filter; voltage damping; stability analysis (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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