Time And Current Grading For Inverse Definite Minimum Time (IDMT) Coordination Relay Setting

Mohd Hafiz, Rosli (2015) Time And Current Grading For Inverse Definite Minimum Time (IDMT) Coordination Relay Setting. Project Report. UTeM, Melaka, Malaysia. (Submitted)

Text (24 Pages) Time And Current Grading For Inverse Definite Minimum Time (IDMT) Coordination Relay Setting 24 Pages.pdf Download (642kB)

Abstract

Protections are viral due to the safety. It is the main aspects due to safety matters in the network systems. In fact, the maximum percentage fault occurs in the reality life is more due to unbalanced fault compare to balanced fault. In transmission line faults, roughly 5% are balanced fault. This is in contrast to an unbalanced fault, where the three phases are not affected equally. Lack of coordination in the relay setting might lead to inherent tripping in the system. The impact will reduce the system efficiency and might be cause danger to the consumers. This problem can be solved by proposing the proper relay setting technique by coordination the value of current and time in particular system. Relay that used in this project is inverse definite minimum time relay (IDMT) and it is have a widely application in distribution system. On the other hand, this study will use Computer Aided Protection Engineering (CAPE) software to analyze the selected area to determine the performance of the network system. As a result, the values of the simulation which is the fault and the relay coordination will be recorded. The result from the CAPE software is more accurate in term of power flow, fault analysis and relay coordination. As a conclusion, the CAPE can be used to analyze the values of power, fault analysis and relay coordination. Then, the impact of the relay setting will be avoided miscommunication, tripping happen to the network.

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