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Item Enhancing Efficiency in Can Manufacturing: A PLC Migration Project from Hardwired Electronics to Siemens S7-1500(NATIONAL HIGHER SCHOOL OF TECHNOLOGY AND ENGINEERING - ANNABA, 2025) MEHDI Quods; DJELLAL Adel (Encadrant)Modernizing aging industrial control systems is essential for improved reliability and future adaptability. This project implements a control system upgrade for the Soudronic FBB 5600 welding machine. Critical hardware components are retained, while the core supervisory logic is migrated to a Siemens S7-1500 PLC. The sequential control logic is developed using Grafcet within Siemens TIA Portal. An integrated HMI provides operator control and—critically—precise fault diagnostics, displaying stoppage reasons directly to expedite troubleshooting. The system’s functionality was validated using a 3D simulation in Visual Components. This approach demonstrates a practical modernization strategy for legacy equipment.Item Diagnostic et amélioration des plans de protection électrique MT/HT(ECOLE NATIONALE SUPERIEURE DE TECHNOLOGIE ET D'INGENIERIE-ANNABA, 2025) BADJI Sabra; ZEMOULI Nour El Houda; CHIHEB Sofiane (Encadrant)This dissertation studies the coordination between electrical protections within the SPE Koudiet Eddraouch combined cycle thermal power plant. Following critical incidents that caused the production shutdown of a 400 MW unit , a detailed analysis of the protection plan was carried out . The study includes modeling under the ETAP environment of the observed electrical faults, validation of the tripping sequences and the proposal of solutions to improve the selectivity and coordination of the protection devices. The work also addresses the malfunctions of the High Speed Transfer Systems (HSTS). Through improved settings and a new protection plan, this work aims to strengthen the reliability and continuity of service of the plant with the best possible solutions .