Stochastic optimization of a stationary energy storage system for a catenary-free tramline
Artikel i vetenskaplig tidskrift, 2020

To realize economical operation of a catenary-free tramline, we propose installing a stationary energy storage system (SESS) to assist the electric grid for trams charging. As the tram operation may not be fully aligned with a predetermined timetable, an economical coordination of the electric grid and the SESS under uncertain charging demands is investigated. To this end, a chance-constrained program is formulated where demanded charging of the tramline is satisfied in a probabilistic sense. The introduced chance-constrained program is translated into a robust and deterministic mixed-integer second-order cone program (MISOCP) by first saturating charging power to a stochastic upper limit and then prolonging charging periods until entire energy is delivered for all charging scenarios that are being investigated. A case study for the Haizhu line in Guangzhou, China, shows that a cost–benefit of 13.70% can be obtained by installing an SESS when charging power is fully delivered for all scenarios, while a 28.47% cost-saving can be achieved when charging power is delivered 99% of the time.

Catenary-free tramline

Mixed-integer second-order cone program

Optimal sizing

Chance-constrained program

Stationary energy storage system


Shaoyuan Wei

Beijing Jiaotong University

Nikolce Murgovski

Chalmers, Elektroteknik, System- och reglerteknik

Jiuchun Jiang

Sunwoda Electronic Co.

Xiaosong Hu

Chongqing University

Weige Zhang

Beijing Jiaotong University

Caiping Zhang

Beijing Jiaotong University

Applied Energy

0306-2619 (ISSN) 18729118 (eISSN)

Vol. 280 115711


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