Análisis de transitorios electromagnéticos en la red del sistema eléctrico Metro de Quito

Abstract

This work presents a study of electromagnetic transients, these phenomena would produce in the Electrical System of the Metro de Quito (SEMQ by acronym in Spanish) when presenting of starting and braking events of electric trains driven by a set of induction motors, and the effects these phenomena will have in their feeding points. The parameters of the electrical elements for transient state, such as: power transformers, transmission lines, AC/DC converter and catenary (DC line), are obtained from the degree work that precedes it (reference [1]). The modeling of the electrical load is composed of the DC/AC converter and the induction motors, this is obtained from DIgSILENT PowerFactory library models. All these models will be applied in the mentioned software for the creation of the SEMQ dynamic model. DIgSILENT PowerFactory allows starting and braking simulations of the electric motors through its dynamic simulation tool (EMT). Once the simulations have been carried out, the results are evaluated to know if these are within actual energy quality standards. A proposal for the design and coordination of protections is also performed at the power supply points, with the purpose of not to present a false operation of the protection system by the starting and/or braking of the electric motors.