Optimum Sizing and Estimation of a 30 kWp Hybrid Solar Photovoltaic System with Multilevel Inverter
Ahmad Faiz Minai1, T. Usmani2, M. A. Mallick3
1Electrical Engineering Department, Integral University, Lucknow, India
2PVC, Integral University, Lucknow, India.
3EN Department, Integral University, Lucknow, India,
Abstract—In this paper, an optimum sizing and estimation of a hybrid solar photovoltaic plant is done in which battery storage is designed for four hours and rest requirement is fulfilled by AC mains. The system was designed for a University library in Uttar Pradesh, India to cover basic electricity needs when grid power is not available. Lighting and Fans were considered as basic electricity needs for each place. The photovoltaic array consists of 120 photovoltaic modules of 250 Wp each, for a combined 30kWp total installed power. In the University the overall requirement from 9:00am to 04:00pm is fulfilled by AC mains. At any instant when power from the grid is not available (up to 4 hrs.) the basic requirement such as fans and tube lights in the reading halls of the library are switched to SPV system either manually or automatically. Using this sizing and estimation study and then implementation of it, the requirement of overall basic load i.e. 30kWp is fulfilled. Also during the day, the basic load may be satisfied directly from the photovoltaic generator through a multilevel inverter (30kVA), while any energy surplus is directed to the battery storage. There is a battery bank design of 60 batteries of 240Ah. The batteries cover basic load peaks in absence of grid power. The paper presents sizing, estimation and payback for the complete system. See More
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