Supervisory System for On-Grid Solar Power Plant

Abstract

The implementation of a home-scale solar power plant is generally configured with an on-grid system. The on-grid solar power plant system has a disadvantage at certain times, the electrical energy generated by the solar power plant exceeds the load power consumption. This makes the electrical power generated by the solar power plant flow back to the kWh meter and is wasted. This phenomenon can be overcome by implementing a supervisory system on the on-grid solar power plant system. The supervisory system aims to regulate the solar power plant system so that it should not exceed the load consumption power but not reduce the productivity of the solar power plant system itself. Sampling data was recorded on 13–15 and 26–31 July 2022 (10 days) from sunrise to sunset. This system uses PZEM-004T sensor as a tool for load and solar power plant power monitoring. The supervisory system was successfully regulating the performance of the solar power plant to adjust the load power consumption. The energy generated by the solar power plant during the data retrieval process is 13,054 kWh. The average power generated by the solar power plant and the power supplied by PLN for 10 consecutive days is 104.96 Watts and 363.52 Watts. The data is obtained from the results of the supervisory system that successfully regulates the performance of solar power plant by regulating the activation of each Solar PV module using relay. The monitoring results of the supervisory system can be accessed via internet through the Thinger.io platform. The supervisory system can optimize the generation performance of the solar power plant system practically. Thus, the power is not wasted to the grid compared to the installation of export and import kWh meters.