Análisis de cortocircuito en un sistema industrial bajo normativas ANSI E IEC, simulados en DIGSILENT POWER FACTORY

Abstract

This thesis presents a detailed short-circuit analysis of an industrial electrical system modeled according to the IEEE Std 141-1993 diagram. It evaluates protection coordination under ANSI and IEC standards. Using DIgSILENT PowerFactory simulation software, an accurate model of the industrial electrical system was designed, including generators, transformers, transmission lines, loads, and protective devices. This model allows for a comprehensive analysis of the system's operating conditions and its behavior under different fault scenarios. Short-circuit current calculations were performed for various fault types, including three-phase, two-phase, and single-phase faults, under varying operating conditions. These calculations were carried out both manually and through simulation in DIgSILENT PowerFactory, following the standards established by IEC 60909 and ANSI/IEEE Std 141. The results obtained were compared to identify the differences and similarities between the ANSI and IEC standards methodologies, highlighting how each approach influences the sizing and protection of industrial electrical systems. The study provides a comprehensive overview of the critical parameters that affect system stability and safety, including the magnitude of short-circuit currents, clearing times, and voltage levels at different points in the system. Specific recommendations are offered to improve protection coordination and ensure the safe operation of industrial facilities.