Análisis y simulación de un esquema de protección diferencial para una línea de distribución con relé SEL 787L

Abstract

The work presented with the title "Analysis and simulation of a differential protection system for a distribution line using the SEL 787L relay" is to simulate a differential protection system for a distribution line using Matlab and DIgSilent Power Factory. The objective of this system is to improve speed and accuracy in detecting and eliminating electrical faults, reducing the risk of damage to the line and ensuring reliable power. The idea of this project arose from the need for safer and more reliable protection systems in electrical distribution networks. External and internal faults can occur on distribution lines, causing interruptions, damage to equipment and even unnecessary downtime. The SEL 787L relay is indispensable here because it allows for fast and efficient error detection and elimination. During its development, the project includes the design of a simulation model to analyze the operation of the protection system under various fault scenarios. Test protocols are also offered to verify its effectiveness and compare configurations to choose the best option. In addition, we study how external disturbances can affect system coordination and propose adjustments to avoid false alarms and improve their stability. The methodology combines simulations performed in Matlab and DIgSilent, which facilitates the modeling and testing of the protection system in a controlled environment. The results of these simulations will help develop more robust and effective protection systems that will benefit electrical professionals and provide useful information to the academic and professional community. This project represents an important contribution to the field of electrical engineering because it focuses on the design and validation of practical and innovative solutions that improve the operation and reliability of electrical distribution networks.