Management System for Sensitive Loads by Integration of Online UPS and Grid-Tie PV Source.

Abstract

This paper presents a solution to address power outages by integrating a photovoltaic (PV) solar energy source with an online uninterruptible power supply (UPS). Designed for a jewelry manufacturing factory, the system ensures uninterrupted power, preventing losses from outages, such as the solidification of molten materials. The initial hybrid setup faced issues during grid interruptions, disconnecting the solar system and relying solely on limited UPS storage. To resolve this, a circuit was developed to redirect PV energy to recharge UPS batteries during outages, enabling the factory to operate on solar power during the day. This reduces grid dependence and electricity costs, saving 1,570 kWh and $700 monthly, or $8,400 annually which is equivalent to 35% of the original bill. The system enhances operational and economic efficiency, offering a sustainable energy solution. The proposed solution was simulated on the MATLAB/SIMULINK platform to model weather and loading behaviors, ensuring constant load voltage under varying conditions. The practical implementation was carried out, and the results were verified and measured to confirm the system's effectiveness.