Optimal energy management of grid connected solar photovoltaic with battery energy storage system under various tariff regimes across different climatic zones/

Abstract

The urbanization growth, industrial infrastructure and upgrading the modern lifestyle has increased the demand of electrical power while the conventional power sources are not compatible enough to fulfil power demand as well as these cause of environmental pollution like global warming, green-house gas emission and health challenges. Renewable energy sources like solar, wind, geothermal and hydro are the feasible alternative of conventional grid that provide cheap, efficient, and eco-friendly. This study involves the hybrid grid connected photovoltaic system for residential loads. The impact of import and export power to grid and net-metering are considered. Two different feed-in tariff rates are employed in this study to visualize the impact of feed-in tariff on system size and cost of electricity. The optimal sizing of component is done for the technical analysis of system and optimal operation in terms of cost of electricity. This study involves impact of climatic regions and their respective load to evaluate the techno economic analysis of system. the sensitivity analysis is done for the sellback rate power rate. The share of renewable energy is investigated by carbon emission for environmental analysis. Robust analysis is done by varying the load according to season and region. The components of the system are sized up to 100%renewable fraction depending on system load and region type. The cost of electricity is reduced upto0.832 to 12.8Rs/ KWh depending on the rate of electricity import of specific region and sell back rate of electricity. The system net present cost is reduced to up to 23- 50% according to system size and availability of region electricity rate. According to the system techno-economic analysis if the rate of sellback power is 2/3rd of import power, the cost of electricity and net .present cost of system are reduced to 1/3rd according to region electricity tariff rate while when the sellback power rate is 1/3rd of export tariff rate, the cost of electricity and net present cost of system are reduced up to half of region electricity import tariff rate. Carbon emission is reduced by 99% by this proposed system. the regions having 100% renewable fraction would result less than 1kg/year carbon emission.