International Journal of Electrical Engineering and Applied Sciences (Aug 2019)
Evaluations on Performance of Overcurrent Protection Relay Based on Relay Operation
Abstract
Protection system plays an important role in detecting the presence disorders and may prevent damage caused interference. This can improve the reliability of the system to maintain continuity of supply to the load. Overcurrent protection is among the important and earliest protection scheme in power system. However the interruptions in power system can happen by fault current. Besides, the improper setting or wrong selection and positioned of the power protection devices is among the reason. Therefore, to maintain and improve the performance of the protection system, this thesis presents a model of overcurrent protection scheme in power system network. This thesis describes research carried out to investigate the performance of overcurrent relay on relay operation time (ROT) based on several cases. The model of overcurrent protection system and analysis is developed by using PSCAD simulation software. There are several requirement or conditions are set in order to understand and analyze the reaction and performance of protection system model. The various type and location of faults and relays is proposed in this project to see the changes in power system protection performance. Besides, the implementation of different curve characteristic and various standards also performed.
