Optimal Utilization of Regenerative Energy by Using Power Profile for Urban Rail Transit

Urban rail transit (URT) has developed rapidly in modern cities, its energy efficiency is getting more and more attention. The utilization of regenerative energy (URE) is an important method for energy-efficient operation of URT. Regenerative braking is an energy recovery mechanism that slows down a moving vehicle by converting its kinetic energy into electric energy. Other trains could use these regenerative energy by accelerating in a cooperative way. In order to maximize the URE, this paper puts forward an energy calculation method which considering regenerative braking power to optimize the timetable. First, the authors define 4 operating Modes of energy utilization, and formulate an integer programming model. Second, the authors design a branch and bound algorithm to solve the optimal timetable at different scenarios. Third, based on the operation data from the Yanfang Line, Beijing Metro, the authors evaluate the model. For peak hours, the results illustrate that compared with the original timetable, the proposed method can significantly improve the URE by 73.7%. For off-peak hours, it can improve the URE by 46.3%. Finally, the comparison between the proposed method and the kinetic energy based method is given. The proposed method could increase the URE by 29.75% and 9.93% for peak and off-peak hours scenarios respectively.

Language

  • English

Media Info

  • Media Type: Web
  • Features: Figures; References; Tables;
  • Pagination: 17p

Subject/Index Terms

Filing Info

  • Accession Number: 01764047
  • Record Type: Publication
  • Report/Paper Numbers: TRBAM-21-02078
  • Files: TRIS, TRB, ATRI
  • Created Date: Dec 23 2020 11:18AM