Open AccessResearch on Control Strategy of Grid-Connected Converter Based on Virtual Inertia
Author(s) -
Ke Wang,
Guangzhu Wang,
Chengxi Li
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/486/1/012008
Subject(s) - inertia , inertial frame of reference , control theory (sociology) , microgrid , computer science , block diagram , grid , small signal model , transfer function , power (physics) , voltage , control (management) , engineering , electrical engineering , physics , mathematics , geometry , classical mechanics , artificial intelligence , quantum mechanics
As the DC microgrid has low inertia, this paper draws on the virtual synchronous machine technology to propose and control a new virtual inertial control strategy. This control strategy enables the grid-connected converter to have both AC inertia and DC inertia. By small signal decomposition, the transfer function block diagram of the system is established. The effects of different inertial parameters on the system’s AC inertia and DC inertia are studied. The dynamic characteristic analysis and simulation results show that the proposed virtual inertial control can effectively suppress the fluctuation of DC bus voltage and AC power and increase the AC and DC inertia of the converter.