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Virtual synchronous generator: an overview

Lookup NU author(s): Dr Nabila Rufa'IORCiD

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This is the final published version of a working paper that has been published in its final definitive form by University of Nigeria Press Ltd, 2019.

For re-use rights please refer to the publisher's terms and conditions.


Abstract

The continuous increase in the penetration of renewable energy (RE) based distributed generations (DGs) in the power system network has created a great concern on the stability of the existing grid. Traditional bulk power plants, which are dominated by synchronous machines (SMs) can easily support system instability, due to the inherent rotor inertia and damping characteristic, as well as voltage (reactive power) control ability. Nevertheless, converter based RE has some special characteristics, such as stochastic real and reactive power output, quick active and reactive power response, small output impedance, and little or no inertia and damping property thereby causing frequency and voltage instability in the system. To solve this problem, virtual synchronous generator (VSG) concept was proposed to emulate some of the features of conventional SG through converter control strategy in order to provide additional inertia virtually. Different control schemes for VSG has been proposed in literature. Surprisingly, an overview of these schemes is yet to be efficiently presented. This paper presents an overview of the VSG control schemes. It provides the concepts, the features of the control schemes and the applications of VSG. Finally, the crucial issues regarding VSG control schemes and the necessary improvement that need to be addressed are highlighted.


Publication metadata

Author(s): Mohammed OO, Otuoze AO, Salisu S, Ibrahim O, Rufa'I NA

Publication type: Working Paper

Publication status: Published

Journal: Nigerian Journal of Technology

Type of Article: Original research article

Year: 2019

Pages: 153-164

Publisher: University of Nigeria Press Ltd

URL: https://www.nijotech.com/index.php/nijotech/article/view/1927

DOI: 10.4314/njt.v38i1.20


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