Techno-Economic Analysis and Feasibility of Hybrid (Diesel/PV/ Battery) Grid-Tie and Islanded Power System in National University of Sciences and Technology, Islamabad, Pakistan /

Abstract

Pakistan's electricity relies so much on foreign fuels. This is affecting negatively on the country's social and economic growth. since the inception of the last two decades, forcing utility operators to suffer periodic power outages. We faced energy transmission issues such as our generation of energy is higher as compared to the energy demand (because of the old inadequate transmission system it's difficult to transfer more energy on the existing transmission lines) that’s why we tried to implement renewable energy resources on the Distribution side for mitigation of this transmission and environmental issues. In this regard, the use of Diesel Generators (DG) has always been preferred as an alternative because they are readily available for balancing the load, even though they have a higher Cost of Energy (COE). Due to Green House Gas (GHG) emissions, backup power generation based on DG has an adverse impact on the environment. So, it is the need to design a system that can generate electrical power by using more renewable energy and less DG and fossil fuels. Renewable energy has the ability to cope with energy crises, and it is now being implemented worldwide. This study addresses the energy crisis of the grid-connected site of the National University of Science and Technology, Islamabad. The research is conducted by using available solar and fossil fuel resources in addition to Generators (DG). For simulation purposes, the potential demand is validated, and available resources are identified. The system with multiple combinations of Renewable Energy Technologies (RETs) is anticipated to simulate with a Hybrid Optimization Model for Electric Renewables (HOMER). Optimization and size considering technical and economic factors, which include Net Present Cost (NPC) and Cost of Energy (COE), and power generation rooftop PV are tackled using HOMER. Different cases are considered to investigate the most efficient and optimum micro-grid option. After all possible cases, we analyze which is a possible best hybrid system which comes out to be the most feasible and cost-effective solution for Total Net Present Cost (TNPC) & Cost of Energy (COE) with reduced emissions and saving of the fuel. These cases will be implemented on both grid-tie and Islanded Distributed generators.