Design and Implementation of a 30KVA Hybrid Inverter Solar and Utility Supply

The greatest desire of mankind is to have reliable and sustainable electricity. Over the years, conventional, non renewable energy resources e.g. coal, oil, fuelwood etc had been harnessed to generate electricity. However, these resources are depleting with constant usage. This had initiated a switch in attention to renewable energy sources like wind, solar, tidal energy etc. This paper therefore, demonstrates the design and implementation of a 30KVA hybrid inverter using solar panels and utility supply as means of charging so as to generate reliable and sustainable electricity. To achieve this, hybrid inverter with solar battery charging system consists of an inverter powered by a 192V battery was installed. This inverter generates up to 240V AC with the help of driver circuitry and a heavy load transformer. This battery gets charged from two sources, first being the mains power supply itself. If the mains power supply is available, the relay switches to the connection using mains power supply to supply to the load. This power supply also charges the battery for using it as back up the next time there is power outage. The use of solar panel to charge the battery gives an additional advantage of surplus power in case the power outage of mains is prolonging. Thus, this inverter can last for longer duration's and provide uninterrupted power supply to the user. While the solar panel converts solar energy to electric energy and charge up the batteries during the day with the help of MPPT charge controller, the charge controller was able to accommodate 200VDC from the solar panel and deliver an output voltage 192DCV while converting the excess voltage to current at 192V 100A to the battery. The DC output of the battery was also converted to the usable AC form the inverter. This made it possible for the system output to be used to power domestic appliances. The system design is considered for a residential building in Nigeria. During the test of the solar panels, the results obtained showed that the solar panels were more than sufficient to charge the 3200AH batteries that were connected in series and parallel arrangement for many hours especially during the day. Although, the 192VDC input required by the system to function would not be available at all times in a day, the use of a 192V battery as an auxiliary power source increased the length of time for which the system was available since 3200AH was all that was needed to power the system but another back up of 3200AH was incorporated to span the usage time. The system operate at minimum running cost, pollution free environment, noiseless, reliable and provide the convenient of a twenty four hour power supply. With this system, energy efficiency was achieved. Makinde Kayode | Ibrahim Abubakar "Design and Implementation of a 30KVA Hybrid Inverter (Solar and Utility Supply)" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-6 | Issue-4 , June 2022, URL: https://www.ijtsrd.com/papers/ijtsrd50253.pdf Paper URL: https://www.ijtsrd.com/engineering/electrical-engineering/50253/design-and-implementation-of-a-30kva-hybrid-inverter-solar-and-utility-supply/makinde-kayode