Perancangan Sistem Monitoring Harmonisa dan Rugi-Rugi Daya Secara Real Time Berbasis Internet of Things

Abstract

Power electronics devices have been widely utilized in industries due to their higher efficiency and lower energy consumption compared to conventional devices. However, power electronics can induce harmonic distortion, leading to an increase in load current. This rise in load current results in higher power losses and excessive heat in electrical equipment. Therefore, a harmonic and power loss monitoring system is essential to assess the reliability of the electrical power system. This study presents an Internet of Things (IoT)-based harmonic and power loss monitoring system that enables real-time remote monitoring. The system employs an ESP32 microcontroller for data processing and utilizes the Message Queuing Telemetry Transport (MQTT) communication protocol to transmit the required electrical data to users. Testing was conducted using a variable speed drive (VSD) to control the rotational speed of an electric motor at varying frequencies of 30 Hz, 40 Hz, and 50 Hz, with disc braking applied to the motor at 7.5A and 8.5A for each frequency. The test results indicate that the designed system effectively displays harmonic current data, total harmonic distortion (THD) of current, and electrical power losses.