Abstract
The paper presents the results of economic study of energy storage system (ESS) implemented in 3 kV DC power supply system. Two conceptions of ESS have been investigated: ESS with supercapacitor (SC) and hybrid ESS (HESS) with SC and LFP battery. The investigated locations of energy storage systems are considered among existing traction substations in two railway lines with different density of train operation. The considered aims of energy storage system implementation are decreasing of energy consumption by maximum regenerative energy utilization and reduction of peak 15- min power demand of traction substation. The paper presents a method of regenerative power estimation depending on the location of the considered ESS implementation point. Also the method of optimal location selection of ESS in terms of minimization of Simple Payback Time (SPBT) of investment is presented. Besides the influence of initial cost value as well as energy price on the SPBT value are investigated. The results are compared between two railway lines with different number of trains operating.
Highlights
Energy efficiency is increasingly gaining in importance, due to the climate changes and global grow of CO2 emission
The results presented in the paper show that the regenerative energy available in the point of potential energy storage system (ESS) system connection depends on its location
The available energy depends on one hand on the number of trains operating and the number of stops, where trains brake with recuperation, but on the other hand on the overhead receptivity [11-12]
Summary
Energy efficiency is increasingly gaining in importance, due to the climate changes and global grow of CO2 emission. That condition gives the opportunity of braking power utilization, which in the case of a large number of stops enables to save between 10 % and 30 % of traction energy [1,2,3,4]. Considering the given railway line the significant influence on regenerative energy utilization has the location of the ESS. The appropriate energy management strategy has been used for the ESS with SC and LFP battery. The economic effect of the ESS implementation on traction substation depends on the substation location, the ESS topology, its sizing and the energy management strategy. Due to the necessity of taking into account the number of factors important from the point of view of regenerative power availability along the railway track the appropriate simulation model needs to be used. The methodology of power flow calculations has been developed by range of authors [7,8,9] whose results and descriptions were the source of model development
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
