Design and Implementation of Distribution Transformer Monitoring and Control System for Remote Electric Power Grids

Abstract

This paper presents design & implementation of a mobile embedded system to monitor and record key peration parameters of a distribution transformer like load current, voltage unbalance, transformer oil & ambient temperatures. The proposed monitoring system integrates a Global Service Mobile Modem, with standalone single chip microcontroller & sensor packages. It is installed at the distribution transformer site & the above mentioned parameters are recorded by using the built-in 8 channel analog to digital converter (ADC) of the embedded system. The acquired parameters are processed & recorded in the system memory. If there is any abnormality or an emergency situation then system sends messages to designated mobile telephones containing information about the abnormality according to some predefined instructions & policies that are stored on the embedded system EEPROM. Also, it sends SMS to a central database via the GSM modem for further processing. This system will able to benchmark the DT measurements to abnormal operation and take action before failure.