Design Of Electricity Energy Sources In University Of PGRI Semarang Using Off-Grid Solar Panel Systems

Abstract

The source of electricity in each university building in PGRI Semarang is obtained from each distribution transformer or power transformer. The power transformer used to distribute electricity in the central building (GP) has a capacity of 400 KVA, while the power transformer used in the main building (GU) has a capacity of 160 KVA. In the previous study, identification of the quality of electrical power in the PGRI University Semarang building, obtained a low power data factor and a large electrical network harmonics. The problem was solved by designing and installing bank capacitors and harmonic filters. To avoid dependence on PLN electricity and not using a generator when PLN electricity goes out, the source of electrical energy is designed by using solar energy sources through Photovoltaic. Solar Panel as an important component of solar power plants, converts sunlight into electricity. In designing off-grid solar panel systems it is only used at night or when PLN electricity goes out. In the design in the Central Building (GP) four solar panels and a battery unit are needed. Each solar panel unit consists of 14 solar panels and a battery unit consisting of an array of 110 batteries. The simulation results show that the simulation output power is almost the same as the design output power, which is 280,045 Watts. This shows the results of the design can be used to make electricity resources using solar panels. The inverter’s output voltage is also in accordance with the voltage used in the load of the house, which is 220V AC.