Objectives:
At the end of this lab session, students will be able to
• Use “Sim Power Systems” for modeling the power system.
• Implement “Over Current Relay” by using Matlab Simulink Libraries.
• Set the “Current Setting” of Over Current Relay.
• Learn how to create an electrical subsystem.
Introduction:
Utilities are responsible for the generation, transmission and distribution of electricity to customers. Part of this responsibility is ensuring safe but yet reliable power supply to customers. For the purpose of safety and protecting the transmission and distribution network from faults, utilities worldwide have the sophisticated protective equipment. Collectively, these are known as secondary equipment and include the current transformers (CT), potential transformer (PT) and protective relays.
Laboratory Task
Implement overcurrent relay in Matlab Simulink that protect the system from short circuit faults. After sensing the fault relay should give a trip signal to the circuit breaker.

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