Digital Differential Current Protection Scheme of Transformer Using an Arduino UNO Microcontroller

摘要

Transformers are the key equipment in electrical power transmission. So the use of transformers protection in electric power systems is very crucial and critical as they are required for efficient transportation of electricity to consumers for long term. This paper is concerned with the differential current protection scheme of transformer using a differential relay technique with arduino Uno microcontroller as a differential relay responsible for comparing the differential current values and sends trip signal to the relay (acting as circuit breaker) to open the circuit when there is fault in the protected zone as a result of imbalance in the differential current values. The system is efficient in transformer protection, gives better isolation, has accurate fault detection and quick response time to clearing faults.