Document Type : Research Article
Abstract
This article proposes to design and simulate a smart relay. These relays are installed devices that can be added to an electrical circuit and allow remote control. The main purpose of the proposed smart protection is to improve the dynamic performance of the IEEE 9-Bus network and reduce the number of interruptions and outages due to emergencies or accidents in the transmission system. The installation of a protection system with a smart relay using fuzzy logic control. Artificial controllers used to protect the electrical system by separating the parts that have malfunctioned while keeping the parts that did not fault by issuing a disconnection signal or directing the circuit breaker. Therefore, the protection system must be active and resolute by separating the symmetrical and asymmetrical faults from the transmission system and within the local and international standard specifications. It is worth noting that the MATLAB program and mathematical simulation were used to demonstrate the performance of the system. The proposed system is used to protect the transmission line using distance relays as main protection, and the overcurrent relays as a backup. A backup protection relay is used in case of failure main relay. The most important results depict that the time delay due to the logical relay is about 35ms; the proposed smart relay has a faster response than the logical relay.
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