Research on the Power Sharing Control and Stability of VSGs

Dong Xie; Da-Jin Zang; Peng Gao; Jun-Jia Wang

Research on the Power Sharing Control and Stability of VSGs

Vol. 17, No. 2, pp. 542-550, Mar. 2017

10.6113/JPE.2019.17.2.542

Microgrid

Inverter

Power sharing control

Stability

Virtual synchronous generator

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Abstract

Aiming at the deficiencies of power sharing control performances when a traditional droop control is adopted for microgrid inverters, this paper proposes a microgrid inverter power sharing control strategy based on a virtual synchronous generator. This control method simulates the electromechanical transient characteristics of a synchronous generator in a power system by an ontology algorithm and the control laws of a synchronous generator by control over the speed governor and excitation regulator. As a result, that the microgrid system is able to effectively retain the stability of the voltage and frequency, and the power sharing precision of the microgrid inverter is improved. Based on an analysis of stability of a microgrid system controlled by a virtual synchronous generator, design thoughts are provided for further improvement of the power sharing precision of inverters. The simulation results shows that when the virtual synchronous generator based control strategy was adopted, the power sharing performances of microgrid inverters are improved more obviously than those using the droop control strategy.

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Cite this article

[IEEE Style]

D. Xie, D. Zang, P. Gao, J. Wang, "Research on the Power Sharing Control and Stability of VSGs," Journal of Power Electronics, vol. 17, no. 2, pp. 542-550, 2017. DOI: 10.6113/JPE.2019.17.2.542.

[ACM Style]

Dong Xie, Da-Jin Zang, Peng Gao, and Jun-Jia Wang. 2017. Research on the Power Sharing Control and Stability of VSGs. Journal of Power Electronics, 17, 2, (2017), 542-550. DOI: 10.6113/JPE.2019.17.2.542.