Author/Authors :
Saeedi moghadam، Mojtaba نويسنده Department of Electrical Engineering, Najafabad Branch, Islamic Azad University, Isfahan , , Dehghani، Majid نويسنده Department of Electrical Engineering, Najafabad Branch, Islamic Azad University, Isfahan , , Mousavi badejani، Seyed Mahdi نويسنده Electrical and Avionic faculty, Malek-e-Ashtar, Esfahan , , Mousavi G، Sayed Mohammad نويسنده School of Railway Engineering, Iran University of Science and Technology, Tehran ,
Abstract :
ABSTRACT:Nowadays, due to their high reliability, Micro-grids have improved dramatically. Micro-grids work in two main modes: islands and a network connection. Under certain conditions, the micro-grid is connected or disconnected to the main network. Synchronization of a Micro-grid with the main network must be done when the voltage of micro-grid is in synchronization with the voltage of main network. Phase-locked loops are responsible for detection of phases of micro-grid and main network voltages and when the two voltages were synchronized, micro-grid is connected to the main network. This article studies and simulates the connection of a micro-grid to the main network when the voltages are synchronized and asynchronized.
