Development of smart clamp meter for energy consumption monitoring

Mohd Rushli, Nurul Husna (2023) Development of smart clamp meter for energy consumption monitoring. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

One of the most critical issues nowadays is energy consumption problem, especially electrical energy consumption. An effective technique to monitor this energy consumption is required for effective and optimal energy usage. Electrical energy monitoring can help users be aware of their energy use. At factories, machines electrical consumption are monitored to facilitate industries to minimize cost as well as the scheduling and application of appropriate preventive maintenance. The purpose of this project is to create a remote voltage and current monitoring system, so that any irregular pattern will help user to anticipate any potential problem in electrical system and implement corrections before it gets even worse. The objectives of this project, i.e. from design, construct and test phases were achieved successfully. A project prototype that integrates ESP32 with CT Sensor, Voltage sensor, an LCD and Node MCU was built to meet the project requirements. Basically, this project extends the function of a standard clamp meter with an additional function that will turn it into a smart clamp meter. It can monitor I and V online and real-time and has a data logging capability. The data collected by the voltage and current sensors are sent to a data logging device, and can be displayed at an android using Blynk apps. A number of experiments were carried out to test functionality of the smart meter. For comparisons, a real multimeter is used to measure current and voltage of the appliances to calculate error between smart meter readings and multimeter readings. An extender is proposed in order to ensure measurements using voltage and current sensor can be carried out with safety. The results show a variation of error percentage based on different appliances. The error percentage were found to be 0% for a battery bank, 8.7% for a table fan, 11.11% for a rice cooker and 13.6% for an electric kettle. These results give opportunity for improvement of the project. As a conclusion, a smart meter to monitor electrical consumption of appliances is successfully built and has a valueable benefit to technical operators of local companies to use the product to facilitate their maintenance or troubleshooting work at production line with less effort yet highly reliable.

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