DISCRIMINATION OF POWER TRANSFORMER DIFFERENTIAL PROTECTION USING BPN NEURAL ALGORITHM

Abstract

In a power system, transformers and other electrical equipment need to be protected not only from short circuit, but also from abnormal operating conditions, such as over loading, and different fault protection. The increased growth in power systems both in size and complexity has brought the need for fast and reliable protection scheme for major equipments like transformer. The power transformer protective relay should block the tripping during magnetizing inrush and rapidly initiate the tripping during internal faults .In this paper, First we review the concept of describe the magnetizing inrush current and over- excitation phenomena as they belong to the causes