Analysis of Transient Dynamic Response of Two Nearby Micro-Grids under Three Different Control Strategies

Rashad M. Kamel, Aymen Chaouachi, Ken Nagasaka

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DOI: 10.4236/lce.2010.12006                

Abstract

The need of reducing CO2 emissions in electricity generation field for solving global warming problems have led to increase the interest in Micro-Grid (MG) especially the one which included renewable sources. MG normally operates in normal interconnected mode and connects with the main grid. When a large disturbance happens in main grid, MG transfer to islanding mode. This paper deals with connecting two nearby Micro-Grids to enhance transient dynamic response of the two MGs after isolated from the main grid. Three cases are investigated. The first case discussed the dynamic response of the two MGs when there is no tie line connection between the two MGs after islanding. Second case, studied the dynamic performance of the two Micro-Grids when there is a private line connects the two MGs after islanding from main grid, while the third case deals with two interconnected MGs (after islanding) and automatic generation control (AGC) applied upon each MG to return the frequency to its nominal value and control the tie line power to be with its scheduled value. Results proofed that when two nearby MGs are connected by private line after islanding from the main grid occurs, dynamic response of the two MGs improved well.

Keywords

Micro-Grid, Islanding, Dynamic Response, Tie Line, Nearby MGs and Automatic Generation Control

Conflicts of Interest

The authors declare no conflicts of interest.

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