TY - JOUR

T1 - Metro traction power measurements sizing a hybrid energy storage system utilizing trains regenerative braking

AU - Leoutsakos, G.

AU - Deloukas, A.

AU - Sarris, K.

AU - Apostolopoulos, I.

AU - Mamaloukakis, C.

AU - Kyriazidis, D.

AU - Bensmann, A.

AU - Hanke-Rauschenbach, R.

N1 - Funding Information: The present study was conducted in the framework of the MetroHESS research project of the “Bilateral and Multilateral Cooperation between Greece and Germany”, co-financed and funded by the German Federal Ministry of Education and Research (BMBF) with funding code 03SF0560A , by the European Regional Development Fund (ERDF) and by the Greek National Resources through OP: Competitiveness, Entrepreneurship & Innovation (EPANEK) with funding code T2DGE-0327 . The authors would like to thank the funding authorities, the Centre for Renewable Energy Sources & Saving (CRES) for coordinating the research program, the Athens Metro Operations company (STASY S.A.) and its technicians for taking the extensive electrical measurements, Stercom Power Solutions GmbH (Stercom) who are the MetroHESS project partners producing the Hybrid Energy Saving System units, and the Athens Metro Project Owner (Attiko Metro S.A.) for the permission to publish the paper.

PY - 2023/1

Y1 - 2023/1

N2 - The paper describes the measuring systems and methodology for acquiring traction power measurements on the on-board traction systems of two metro trains and three 750 V DC rectifier substations in the Athens Metro Line 2. Being part of a wider investigation to develop a Hybrid Energy Storage System (HESS), the purpose of the present measurements is to provide traction systems experimental and operational data that would assist in the understanding of the dynamic characteristics of train braking regeneration and quantify the available energy that could be stored in a super-capacitors/batteries hybrid storage system for further use, which would otherwise be wasted and consumed as heat in stations and tunnels through the trains' braking resistors. In turn the stored energy could power upon demand selected stationary electrical loads in Metro stations of a non-safety critical character (such as lighting, ventilation, pumps, etc.) leading to very significant energy savings and to a corresponding reduction of greenhouse gases. Preliminary results confirm the feasibility of the energy saving concept indicating a significant potential for the hybrid energy storage devices and subsequent energy re-use of 4000–6000 kWh/day per rectifier substation of otherwise unused train braking energy, with a typical Metro station stationary loads consumption of 2000 kWh/day.

AB - The paper describes the measuring systems and methodology for acquiring traction power measurements on the on-board traction systems of two metro trains and three 750 V DC rectifier substations in the Athens Metro Line 2. Being part of a wider investigation to develop a Hybrid Energy Storage System (HESS), the purpose of the present measurements is to provide traction systems experimental and operational data that would assist in the understanding of the dynamic characteristics of train braking regeneration and quantify the available energy that could be stored in a super-capacitors/batteries hybrid storage system for further use, which would otherwise be wasted and consumed as heat in stations and tunnels through the trains' braking resistors. In turn the stored energy could power upon demand selected stationary electrical loads in Metro stations of a non-safety critical character (such as lighting, ventilation, pumps, etc.) leading to very significant energy savings and to a corresponding reduction of greenhouse gases. Preliminary results confirm the feasibility of the energy saving concept indicating a significant potential for the hybrid energy storage devices and subsequent energy re-use of 4000–6000 kWh/day per rectifier substation of otherwise unused train braking energy, with a typical Metro station stationary loads consumption of 2000 kWh/day.

KW - Hybrid energy storage system

KW - Regenerative braking

KW - Traction energy optimization

KW - Traction power measurements

UR - http://www.scopus.com/inward/record.url?scp=85143295452&partnerID=8YFLogxK

U2 - 10.1016/j.est.2022.106115

DO - 10.1016/j.est.2022.106115

M3 - Article

AN - SCOPUS:85143295452

VL - 57

JO - Journal of Energy Storage

JF - Journal of Energy Storage

M1 - 106115

ER -