Analysis of Solid State Transformer based microgrid system

The contribution of this paper has been focused on investigating a new microgrid architecture that integrates the electronic transformer (SST, the acronym Solid State Transformer) with microgrids system. The design of the converters required for implementation of the electronic transformer are dealt. The work to provide an infrastructure for creating an intelligent energy system, which will enable the integration of smart grid concepts, microgrid generation distribute and distribution of direct current. The advantages of SST, listed the reduction of the volume and weight as well as fault isolation capability, voltage regulation, harmonic filtering, reactive power compensation and power factor correction. The work presents the advantages of applying the SST in a microgrid system. Therefore, simulation results in MATLAB/Simulink software are presented.

I. Introduction

Recently, the integration of sources of distributed generation (DG) to the electric power system (EPS) and diversification of loads connected to the grid, called for a restructuring of the system so that it meets the demands of these new generation and consumption. This change introduces the need for a distribution system with bidirectional power flow, local controls and management and monitoring capacity. This new system is referred to in the literature as Smart Grid, which involves the use of technologies (sensors, actuators and automation elements) distributed throughout the electrical system and connected by a large communication network. The application and implementation of Smart Grids and, in particular, microgrids - Smart Grid concept extension for power grids with renewable sources - are now being studied in various research centers [1] [11] [14].