Design of a Solar PV based Hybrid AC mini grid System with Load Dispatch Centre for an Offgrid Area of Bangladesh

Abstract

Bangladesh is a developing country with a large population and a smaller area. A large area is still uncovered either by grid electricity or by the electricity generated from renewable sources. Still solar home system is very popular in Bangladesh with some unavoidable constraints. From this perspective, a hybrid AC mini grid system based on solar PV has been designed for an off-grid region of Bangladesh. A survey was held on the rural people of that off-grid area to gather different types of information to design a feasible hybrid AC mini grid system. Cost analysis has been done to set-up the mini grid depending on the information using HOMER software. Furthermore, as it is a hybrid system, others necessary parts have also been prepared to design a complete AC mini grid system. Some indispensable parts of AC mini grid are centralized solar plant, Charge controller, transmission line, energy meter for every consumer and a common Load Dispatch Center (LDC) to control the total system that has been introduced in this paper. Finally, a special grid-tie inverter is designed to hook up the propose system with future National grid. Moreover, a power line carrier communication has been established in order to control every consumer from LDC which can ensure a reliable mini grid system for the off grid area in this paper. This kind of efficient & reliable AC mini grid can be a realistic solution for the off-grid areas of Bangladesh