Simulation of microgrid system and low-cost wireless communication network

Abstract

The MATLAB/SIMULINK model of a microgrid system is presented in this thesis. The microgrid consists of a converter-fed distributed generator photovoltaic array with maximum power point tracking, a converter-fed battery storage system and a critical load which must be fed power under all circumstances. The microgrid is capable of functioning in either grid-connected or isolated modes of operation. A passive islanding detection method is utilized to switch over from P-Q to V/F control mode, when islanding is detected. The behavior of the microgrid under various faults and other conditions is analyzed. In the second part of the thesis, the need for a wireless communication between the secondary and primary controllers of the microgrid are discussed. Proof of concept results to establish a two-way communication channel for the exchange of information between the controllers are presented.