Wireless Real-time Meter Data Acquisition System

Power system in India is becoming very large and complex due to increase in open access users, where some of them draw power from the grid and some of them inject power into the grid. Deviations in power schedules lead to grid instability. To maintain the grid stability real-time monitoring of scheduled power quantum is essential. The solution proposed in this paper provides the real-time meter data acquisition which includes voltage, current, power, frequency, etc and also 15 minutes average load survey data acquisition using TARA (Transmission of Aggregated data for Real-time Access) device. TARA device collects the real-time data and 15 minutes average load data from meters using MODBUS/DLMS (Device Language Message specification) standard communication protocols and transmits data to the control center. TARA uses a GSM/GPRS (Global System for Mobile / General Packet Radio Service(3G/4G)), WAN (Wide Area Network) and LAN (Local Area Network) to provide an economical and viable solution for data transmission. The data acquired at the control center is processed and presented to the operators using the latest web tools to take accurate decisions in maintaining the grid discipline and also helps the open access users to adhere to schedules.