Power System Stabilization Using Virtual Synchronous Generator With Alternating Moment of Inertia

The virtual synchronous generator (VSG) is a control scheme applied to the inverter of a distributed generating unit to support power system stability by imitating the behavior of a synchronous machine. The VSG design of our research incorporates the swing equation of a synchronous machine to expres...

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Bibliographic Details
Published in:IEEE journal of emerging and selected topics in power electronics 2015-06, Vol.3 (2), p.451-458
Main Authors: Alipoor, Jaber, Miura, Yushi, Ise, Toshifumi
Format: Article
Language:English
Subjects:
Damping
Grid connected inverter
Inertia
Mathematical model
Oscillators
Power system stability
smart grid
Synchronous generators
Systems stability
Transient analysis
transient stability
virtual synchronous generator (VSG)
voltage source inverter
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Summary:The virtual synchronous generator (VSG) is a control scheme applied to the inverter of a distributed generating unit to support power system stability by imitating the behavior of a synchronous machine. The VSG design of our research incorporates the swing equation of a synchronous machine to express a virtual inertia property. Unlike a real synchronous machine, the parameters of the swing equation of the VSG can be controlled in real time to enhance the fast response of the virtual machine in tracking the steady-state frequency. Based on this concept, the VSG with alternating moment of inertia is elaborated in this paper. The damping effect of the alternating inertia scheme is investigated by transient energy analysis. In addition, the performance of the proposed inertia control in stability of nearby machines in power system is addressed. The idea is supported by simulation and experimental results, which indicates remarkable performance in the fast damping of oscillations.
ISSN:2168-6777
2168-6785
DOI:10.1109/JESTPE.2014.2362530