Design and Analysis of a Hybrid Backup Power System for a High-Rise and High-Speed Elevator

With increased dependence on elevators in high-rise buildings, a reliable and effective backup power system is in urgent need. In this work, a hybrid backup power system that consists of hydrogen fuel cells, batteries and ultracapacitors is introduced. The electric power system was modeled using the multi-physics/system-dynamics modeling tool, Modelica/Dymola. Power performance of the backup power system was examined using an elevator model built on the same platform. A hybrid energy storage system with ultracapacitors and batteries was designed to deal with the large transient current flow and cost constraint. The size of more cost sensitive fuel cell power system was significantly reduced. This simulation-based design and analysis support the testing and production of the proposed new system.

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