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Monitoreo y Optimización Online de una Línea de Metro: Lecciones de un Prototipo en Metro de Santiago

We present a TIC enabled system for online monitoring and optimization of traction energy consumption in a subway line (Metro de Santiago), satisfying typical operational and safety constraints while keeping high standards of quality of service. Subway systems present some particular characteristics that make especially hard the monitoring and online optimization, such as: high frequency of short trips, short stoppage times for boarding/deboarding of passengers, limited capacity of trains, existence of transshipment stations combining different lines, high demand of service during rush hours, and tunnel travels difficulting wireless communications. These characteristics impose hard computational and communication requirements and require advanced online dispatch procedures due to the size and complexity of the underlying optimization problem and the short response time allowed to analyze and implement optimal solutions. We describe the prototype system developed and tested live in Metro de Santiago. The main components of the systems are described: online data capture and communications, data analysis, online optimization, and traffic regulation interface. WORKSHOP INTERNACIONAL EIG2009 Departamento de Ingenieria de Sistemas Universidad de La Frontera – Chile Diciembre 3 y 4, 2009 2 The problem is approached as a mathematical programming mixed binary model in an online control context. The model is fed with online data captured from the current operation of the trains and wireless transferred to the main computers. The optimization model makes use of the discrete nature of predefined trip profiles allowed to travel from one station to the next. Standard optimization applications and proprietary metaheuristic procedures are used to periodically solve the mathematical model in a few seconds. Results from testing period are presented. The paper finally and presents proposals of future work.