Design, modelling and performance analysis of a residential grid-tied solar photovoltaic system with deferrable load

Abstract

This thesis explores the design, modeling, and economic viability of grid-connected solar photovoltaic (PV) systems for residential applications in Lahore, Pakistan, with a focus on optimizing energy efficiency, cost-effectiveness, and environmental sustainability. Real-time data on the Power consumption is collected of the house for the design and simulation of the system. The research is structured into three interconnected studies, each addressing essential aspects of solar energy viability. It includes examining the economic and environmental benefits of an on-grid solar PV system for a site in Lahore, Pakistan; utilizing two modeling tools: the System Advisor Model (SAM) and HOMER Pro. Both models validate the system's ability to deliver swift financial returns, significant energy cost reductions, and environmental benefits, making it a sustainable solution for Lahore's energy needs. Moreover, the system has the ability to return excess energy to the grid through net-metering which enhances its economic feasibility. The distinctiveness of the study is examining the design and performance of a grid-tied solar system with deferrable air-conditioning loads, considering recent proposed regulatory changes by National Electric Power Regulatory Authority (NEPRA). The study highlights the economic implications of reduced grid buyout rates and by integration the deferrable loads, such as heat pumps, maximum utilization of Renewable source can be achieved. It highlights system cost-effectiveness and sustainability, making it a viable option for residential power generation. Collectively, this thesis demonstrates that grid-connected solar PV systems are economically advantageous, environmentally beneficial, and technically feasible for residential applications in Lahore, Pakistan.