PLC Application as an Automatic Transfer Switch for on-grid PV System; Case Study Jakabaring Solar Power Plant Palembang

Abstract

Programmable Logic Control (PLC) is an industrial computer specially designed to control the manufacturing process, such as robotics, assembly line, power plant, etc. PLC control program analyzes the input signal to decide the output state according to what has been pre-programmed by the user. This paper discussed the application of PLC as an ATS for on-grid PV system at PLTS Jakabaring which is the biggest PV power plant in Palembang. Therefore, it is interesting to discuss the application of PLC as an ATS in controlling which electric power source used to power Jakabaring Sports City to ensure there is no power outage during Asian Games 2018. The data is taken from July 24-27, 2018 before the event, however, the loads needed to power are more-less the same. The application of PLC as an ATS at PLTS Jakabaring is to automate the switching proses of exporting and importing electrical energy. The energy production data is also compared with the weather forecast to show the effect of sunny days on energy production. Data results show the application of PLC as an ATS for PV system; the ATS hold an essential role for the system due to the system independence of solar irradiance.