VSG Control Strategy Incorporating Voltage Inertia and Virtual Impedance for Microgrids

Zipeng Ke, Yuxing Dai, Zishun Peng, Guoqiang Zeng, Jun Wang, Minying Li and Yong Ning
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Zipeng Ke: National-Local Joint Engineering Laboratory of Digitalize Electrical Design Technology, Wenzhou University, Wenzhou 325035, China
Yuxing Dai: National-Local Joint Engineering Laboratory of Digitalize Electrical Design Technology, Wenzhou University, Wenzhou 325035, China
Zishun Peng: College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
Guoqiang Zeng: National-Local Joint Engineering Laboratory of Digitalize Electrical Design Technology, Wenzhou University, Wenzhou 325035, China
Jun Wang: College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
Minying Li: Guangdong Zhicheng Champion Group Co., Ltd., Dongguan 523718, China
Yong Ning: College of Electrical and Information Engineering, Hunan University, Changsha 410082, China

Energies, 2020, vol. 13, issue 16, 1-15

Abstract: Virtual synchronous generator (VSG) control lacks voltage inertia and powerful decoupling capabilities. The voltage of the distributed generator (DG) unit controlled by the VSG will be easily affected by power fluctuations and high-frequency noise, and the DG coupling usually makes the VSG control effect unsatisfactory. In order to effectively reduce power fluctuations, the influence of high-frequency noise on voltage, the influence of coupling on the power regulation, and effectively improve the economy of the economic system, the improved VSG control that combines voltage inertia and virtual impedance is proposed in this paper. The second-order inertia in the proposed VSG control strategy can minimize the voltage change rate and filter high-frequency noise from the excitation and virtual impedance. The virtual impedance in the proposed VSG control strategy can simulate the actual impedance to change the line characteristics, so the coupling of the DG unit can be reduced. Experimental results based on the microgrid platform prove the feasibility of improving the VSG control.

Keywords: virtual synchronous generator; voltage inertia; virtual impedance; distributed generator units; microgrids (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: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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