A Study for the Design of a Hybrid Solar Energy System Connected to the Grid (On-Grid): The Deanship of the Technical Institute of Mosul as a Case Study

This paper presents the design of On-Grid hybrid solar PV system to supply electrical power for Deanship building of the Technical Institute of Mosul at Northern Technical University․ The system was developed to reduce the consumption of electric energy from the public grid and to provide 24 hours sustainable energy․ The renewable energy system supplies electrical energy for the meeting room‚ lighting systems‚ the fire-detection system and the security cameras․ In terms of the applied active and continuous load calculations‚ and sizing of the inverter‚ PV and battery for the Mosul city conditions (e․g․‚ with available roof area = 1380 m2‚ seasonal solar declination angle‚ and shade distance between the PVs)‚ a 20 kVA hybrid system could be installed‚ either consisting of four 5 kVA inverters or two 10 kVA inverters‚ to feed the continuous loads․ Alternatively‚ a parallel 150 kW On-Grid system could be installed in the existing roof space using more than 220 high efficiency n-type HJT half-cut 550 W panels and would export approximately 52 kW of energy over the entire 8-hour day under sunny conditions per sub-array (i․e․ per inverter)․ These results indicate that the proposed hybrid is technically feasible and can considerably reduce electricity costs and promote energy sustainability in educational institutions․