In this repository, I have added my published research work. I have more than two years of research and development experience in Distributed Energy Systems Optimization and Analysis.
"Performance and Economic Analysis of Grid-connected Residential PV DG Systems under Net Metering in Pakistan"
In Pakistan, the National Electric Power Regulatory Authority (NEPRA) in 2015 has introduced net metering incentive, which allows the distributed generation systems of photovoltaic (PV) and wind (from 1kWp up-to 1MWp) to sell excess units of electricity to the grid, and net them off against the units consumed from the grid. The objective is to proliferate and facilitate the use of renewable energy resources for green energy production and also to counter the electricity crisis prevalent in the country. This paper presents a detailed performance and economic analysis of residential consumers of one of the distribution companies in Pakistan, Islamabad Electric Supply Company (IESCO), having solar distributed generation (DG) systems of 3kW, 5kW, and 10kW with net metering. Using HOMER Pro®, a micro grid optimization software, a detailed economic and performance analysis has been performed. Economic analysis includes the net present cost (NPC), levelized cost of electricity (LCOE), internal rate of return (IRR), return on investment (ROI), and simple payback period of the system. Results indicate that as the generation capacity of DG is increased, the LCOE and payback period is reduced while IRR and ROI is increased, which signify the usefulness of net metering policy for the customers. Performance analysis include energy sold to and purchased from the grid, and monthly average electrical production of the DG systems. Finally, some recommendations are made for any further work in this area.
Net metering; Distributed Generation; Photovoltaic; LCOE; NPC; IRR; ROI.
Download Link: "https://github.com/usmanafridi/Research-Work/blob/main/Peformance%20and%20Economic%20Analysis%20of%20Net%20Metering.pdf"
A methodology for the mathematical modelling of a power transformer has been proposed. The transformer has been modelled using its symbolic notations and the differential equations in MATLAB Simulink. A20 𝑀𝑉𝐴, 132/ 11 𝐾𝑉, 50 𝐻𝑧 single and three-phase distribution grid transformers have been developed and simulated in Simulink. To enhance the understanding and reduce the complexity of the model alpha-beta state space vector representation has been used for the three-phase transformer in this paper. A model is created that can be effectively used for the analysis of different phenomenon in power transformers like internal winding faults, insulation failures, incipient faults etc. In this study, it is possible to get a closer understanding regarding the mathematical modeling and its significance in analyzing any electrical equipment in the electrical power system.
Power Transformer, Mathematical Modeling, State Space Vector, MATLAB, Simulink.