A Virtual Synchronous Generator Based Hierarchical Control Scheme of Distributed Generation Systems

Gang Yao, Zhichong Lu, Yide Wang, Mohamed Benbouzid and Luc Moreau
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Gang Yao: Sino-Dutch Mechatronics Engineering Department, Shanghai Maritime University, Shanghai 201306, China
Zhichong Lu: Sino-Dutch Mechatronics Engineering Department, Shanghai Maritime University, Shanghai 201306, China
Yide Wang: Sino-Dutch Mechatronics Engineering Department, Shanghai Maritime University, Shanghai 201306, China
Mohamed Benbouzid: Sino-Dutch Mechatronics Engineering Department, Shanghai Maritime University, Shanghai 201306, China
Luc Moreau: IREENA, l’Université de Nantes/Polytech Nantes, 44602 Nantes, France

Energies, 2017, vol. 10, issue 12, 1-23

Abstract: Sustainable energy-based generation systems, such as photovoltaic and wind turbine generation systems, normally adopt inverters to connect to the grid. These power electronic interfaces possess the characteristics of small inertia and small output impedance, which create difficulties to stabilize the voltage and frequency of a distributed power source. To deal with this problem, a Virtual Synchronous Generator (VSG)-based inverter control method is presented in this paper by introducing virtual inertia and damping coefficient into the control loop to emulate the dynamic behavior of a traditional synchronous generator. Based on this VSG control method, a three-layer hierarchical control scheme is further proposed to increase the control accuracy of the voltage and frequency in a VSG-based distributed generation system with parallel inverters. The principle of the VSG control method, the system stability analysis, the design process of the hierarchical control structure, and the frequency/voltage secondary regulation processes are all specified in this paper. Finally, some numerical simulations are carried out and the effectiveness of proposed control scheme is verified by the simulation results analysis.

Keywords: microgrid; distributed generation; virtual synchronous generator; hierarchical control; frequency/voltage secondary regulation (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: 2017
References: View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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