Design and implementation of a co-processor FPGA-based-numerical relay

A co-processor numerical relay (CNR) is proposed in this paper which offers protection against abnormal conditions like over-voltage, under voltage, over current, over frequency and under frequency. The CNR also performs like a directional relay. Xilinx ISE 14.4 & synthesis has been performed on model-sim is used to investigates the performance of CNR. The prototype model is implemented using FPGA experimental kit. The proposed relay trips the circuit under any one of the abnormal conditional mentioned above. The proposed relay has numerous advantage including compact size and Co-processor functions for protection.