Simulation of microgrid hierarchical control

Abstract

Microgrid (MG) is a key component of the smart grid and, at the same time, is a small scale of it. The MG system has the potential to enhance the electric grid efficiency, power quality and reliability, and offer to the consumers a possible energy independence. The lack of MG compatible control systems is one of the main barriers for wide spread deployment of these kind of systems. In this paper, a hierarchical classification of the control levels and techniques applied to MG is presented. This concept is simulated on a grid-tied MG that consists of a photovoltaic array, a battery system and a diesel generator. The principal focus of the simulation relies on the primary control which shows how the lower level of control responds to modifications in the operational state of the MG.