Smart monitoring of electrical quantities based on single board computer BCM2835

Abstract

Electricity network needs to be monitored, especially for Voltage (V) measurement, current (A), power factor (cos θ), power (W), and energy consumption (kWh). Monitoring is important, in order to know the quality of electricity supply in the system, identifying disruption events, and to calculate the amount of electrical energy consumption periodically. To achieve the objectives mentioned above, we have made device that can be monitor the electrical quantities in real time, recorded data was stored in to database system, and web application processed this data and shown the statistic reports through a web interface. This research was conducted on the 3 phase electricity at The Integrated Laboratory of the Electrical Engineering Department University of Lampung. Monitoring of voltage, current and energy consumption was done by using a step-down transformator as a voltage sensor, ACS712-30A as current sensors for capture the flow measurement, and TEM015-D4250 kWh meter for measuring energy consumption. Power and Power Factor value was obtained by some of scientific calculation. We used Python programming language for data processing measurement and calculation, running on BCM2835 Single Board Computer. The results of measurements include voltage, current, power factor, power, and the amount of energy consumption was stored in to data base, and data report can be accessed online using web browser.