Reliability Analysis of Centralized and Decentralized Controls of Microgrid

With the recent developments in power system and computer science, transforming the traditional grid in to smart grid is inevitable. Microgrids are accepted as one of the key elements of smart grids. Especially, distributed energy sources in microgrids are increasing, electrical and communications interactions are increasing and sophisticated more than ever. These type of energy sources have low inertia and therefore, it may lead to instability of the grid, decreasing in power quality, decreased reliability, operational failures and possible blackouts. Also, since microgrid is very small scale the prediction of load demand becomes harder and it leads to some problems on the grid. For these reasons, it is necessary to conduct reliability assessment on microgrid. There are two types to control microgrid. These are centralized and decentralized controllers. In this paper, reliability analysis of microgrid is reviewed for both centralized and decentralized controller. Various possible analysis and methods which is fit to apply on microgrid centralized and decentralized controller are explained.