Design and Implementation of a GSM-Based Single Phase Prepayment Energy Meter with Hybrid Recharge Mode

Abstract

This paper presents a GSM-based Prepayment Electric Energy Meter implemented with hybrid recharging mode: Mobile Station (MS), Supply Authority Platform and the Keypad. The system was designed around two modules; the hardware and software. The hardware module consists of ADE7755 used to generate the consumption pulses that are measured and recorded by Atmega328P. Atmega2560 was used to manage the unit consumption; control and monitor the activities of the meter. SIM900 was used to achieve the SMS recharging and communication capability. The server consists of Atmega328P and SIM900 for communication. It is interfaced serially with the PC used for the Application Platform. The software module consists of the Application Platform especially for token generation and Database. The SMS Command format for recharging of the meter was also developed. The developed meter has a mean time of 133.46s, 233.3s and 311.1s to consume 0.01KWh on a load of 320W, 200W and 160W respectively with the highest standard deviation of 1.14 at a load of 160W. The results also show a mean time of 28.99sec in the SMS round-trip delay test for SMS recharging and 100% success rate in wireless and keypad recharging. The GSM-based Energy Metering System developed worked satisfactorily. It is reliable and efficient for use by the supply authority and the consumers.