An Approach for Overcurrent Protection using PID Controller with Different Fault Condition

Abstract

A power system network generates, distributes and transmits the electricity. The reliable, as well as safe power systems, are very significant for successful operation. However, various losses and faults occur in power system which prevents the power system to work efficiently and also causes various damages. Overcurrent is a very critical fault as it results in extreme production of heat, and the possibility of fire or device damage, if not tripped timely. In order to protect the equipment from overcurrent, the overcurrent relays were designed. In the existing system, the Inverse Definite Minimum Time (IDMT) over-current relay was used for purpose of over-current protection. However, it consists of various drawbacks such as, they take more time to trip which can lead to damage in equipments. Also, the IDMT over-current relay faces the issue of fault severity variation. Thus, in order to overcome the previous issues, the PID based relay is designed in the proposed work which will perform fast tripping and perform well for different faulty conditions. In this paper, the simulation has been performed to ensure the efficiency of the proposed approach over the conventional one.