MICROCONTROLLER BASED DISTRIBUTION TRANSFORMER PARAMETERS MONITORING DEVICE (TPMD) FOR MONITORING/ISOLATING DISTRIBUTION TRANSFORMER WHEN FAULT IS DETECTED IN A SUBSTATION

The power distribution system is the bridge between the ultimate power users (humans) and the source (generation of power). Therefore, data acquisition from distribution network and their processing for the purposes of monitoring and control of the distribution equipment, lines, voltage and current status in the network, giving rise to the optimization and synchronization of power distribution system for efficient power delivery is important. For advance monitoring and control of the power distribution system from the remote injection substation by substation engineers, a real-time monitoring and control device located at the substations is further designed and simulated with the Proteus Electronics Suite. The data captured by the local monitoring device through its sensors located at transformer substation is transmitted by wireless mean to the monitoring and control unit in the injection substation. The parameters monitored are transformer temperature, transformer oil level, transformer voltage input and output and line voltage, current and faults. The upper threshold value for temperature is 650, voltage of 270 V and current of 300; whereas, the lower threshold value for oil level is 270 litres. Result clearly showed that the designed local monitoring device could efficiently measure the target parameters and classify into “LOW, HIGH OR NORMAL”; relay the data to the control substation and disconnect the substation on a fault condition inimical to the distribution system. The local monitoring device located in the substation complements with the existing state estimation system in the injection substation to improve the monitoring, control, and protection of power distribution system.

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