Optimized over-current relay coordination using Flower Pollination Algorithm

The main purpose of optimization of relay coordination in an extensively large electrical network is to enhance the selectivity and at the same time reducing the fault clearing time to improve reliability of the system. The relays provided are set to function properly in normal as well as abnormal condition. In this paper; the main focus is to find out minimum Time Dial Setting (TDS) for the relays connected in-whatever configuration using Flower Pollination Algorithm. The said algorithm is compared with Linear Programming Technique. The algorithm has been implemented in MATLAB and tested on radial feeder fed from one end as well as on parallel Feeder system. The innovative feature of the paper is application of nature inspired algorithm to one of the major problem of optimization in the field of power system protection.