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High penetration of distributed interface converters (DICs) in the isolated AC micro-grid (MG) may result in poor frequency and voltage response due to low inertia of conventional DICs. In order to overcome this difficulty, the concept of the virtual synchronous generators was proposed recently. meanwhile, in order to improve the convergence rate of the conventional consensus-based droop control and...
As the penetration of renewable energy sources is increasing in the AC micro-grid, the stability of the closed-loop system has raised a major concern since conventional distributed interface converters (DICs) used in the AC micro-grid do not have a rotating mass, and hence low inertia. High penetration of DIC-based micro-grid may result in poor frequency and voltage response during large disturbance...
This paper describes experimental implementations of seamless transfer between grid-connected mode and islanded mode of a three-phase utility-interactive voltage source converter (VSC) for microgrid applications. First, a smooth moving from grid-connected mode to islanded mode is accomplished by the islanding detection and the smooth transition. The islanding detection is achieved by the negative-sequence...
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