Real-Time, PLC based, Energy Monitoring System

This paper presents a Power Measurement Module to create a Real-Time Energy Monitoring System. The power measurement module measures electrical data in a three-phase supply network. The three-phase voltages and currents are fed as inputs to the power measurement module. Based on these input values, total power factor, total active energy and frequencies of the three phases are calculated. The Programmable Logic Controller (PLC) is programmed to acquire the electrical data from a remote station (where the PLC-based system is installed). The acquired data is stored in a relational database. Modbus TCP communication is used to retrieve live data from the remote station. A Supervisory Control and Data Acquisition system is conceptualized and developed. It has the capability to generate reports and trends of the data recorded in the relational database. Any wastage of energy can be sensed and corrective action can be taken by monitoring the recorded data.