Challenges and Opportunities of Rooftop Solar PV Penetration to National Grid: Bangladesh Perspective

Abstract

The electricity consumption in Bangladesh is higher than ever. A large number of people are still deprived of electricity and demand is rapidly increasing. In this scenario self-powering, our houses will be a great idea which will meet our daily demand. Here, we have discussed the challenges and opportunities of a bi-directional grid-connected rooftop solar power generation system which utilizes the enormous natural resources of solar. We have considered the free rooftop of our housing for power generation. Solar photovoltaicmodules areplaces upon the rooftop free space where sunlight is converted to electricitywhenmade fall on solar PV moduled. This generated electricity is used for self-powering houses and surpassed power will be delivered to the grid company. This system comes with numerous challenges, for example, designing an MPPT for maximizing the solar panel output, grid-tied inverter, investment security and many more. A Transformerless grid tie inverteris proposed which employs a new techniquecalled Dual-Stage Switch for Buck-Boost conversion. It swells the efficiency of the inverter up to 95%. A constant voltage based algorithm is designed to minimize conversion losses. The simulation results are analyzed through PSIM, PROTEUS, MATLAB software. The simulation results show that the rooftop solar energy system has the potential to meet the challenges of the power crises in Bangladesh where land and resources are limited.