Techno economic analysis on integration of grid connected storable solar power generation

Abstract

Sri Lanka is having renewable energy target of 20% at year 2020. According to “Long Term Generation Expansion Plan (LTGEP) 2015 - 2034” published by Transmission & Generation Planning Division of Ceylon Electricity Board (CEB), it is planned to add more and more renewable power plants to the National Grid. As the solar resource availability in Sri Lanka, it is planned to add also more and more solar power plants to the National Grid. Prevailing load curve consists of a peak at night from 6.30 pm to 9.30 pm in Sri Lanka. So, additive solar power plants is useful if it has energy storable nature. But, the storable solar power plants are new to Sri Lanka and the plant technologies are advanced. So, Techno economic analysis on grid connected, storable solar power plants is required. In the research work, three types of grid connected storable solar power plant technology options have been modeled to replace existing PV plant without storage in Hambantota hypothetically. Case study is done on existing grid connected, photovoltaic (PV) plant in Hambantota owned by Sustainable energy Authority (SEA). Discounted cash flow analysis using avoided cost scenario have been used. Analysis is done for 25 year operating period of plant.