The hybrid energy storage system (HESS), which consists of battery and ultracapacitor (UC), can efficiently reduce the substation energy cost from grid and achieve the peak-shaving function, due to its characteristics of high-power density and high-energy density. The sizing of HESS affects the operation cost of whole system. Besides, operation stability (such as substation peak power and voltage fluctuations) is rarely considered in urban railway transit (URT) when sizing optimization of HESS is considered. Thus, this research proposes a sizing and control strategy optimization of HESS in URT. First, the mathematic model of URT with HESS is established, which is used to simulate URT and HESS operation state by a power flow analysis method. Then, based on the proposed HESS control principle, a bilevel optimization of HESS in URT is proposed. The master level aims to optimize the rated capacity and power of HESS, reducing total operational cost. Then, the HESS control strategy is optimized at slave level, reducing substation peak power and voltage fluctuations of URT. The case study is conducted based on the data of Merseyrail line in Liverpool. A comparison is also conducted, which shows that the proposed method can reduce daily operation cost by 12.68% of the substation, while the grid energy cost is decreased by 57.26%.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Bilevel Optimization of Sizing and Control Strategy of Hybrid Energy Storage System in Urban Rail Transit Considering Substation Operation Stability


    Contributors:

    Published in:

    Publication date :

    2024-12-01


    Size :

    12337564 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Efficient Bilevel Approach for Urban Rail Transit Operation With Stop-Skipping

    Wang, Yihui / De Schutter, Bart / van den Boom, Ton J. J. et al. | IEEE | 2014



    Sizing and energy management of on-board hybrid energy storage systems in urban rail transit

    Graber, Giuseppe / Galdi, Vincenzo / Calderaro, Vito et al. | IEEE | 2016


    Urban rail transit traction power supply system and substation

    LIU CHANGZHI / LIU BIN / ZHENG LIYUN et al. | European Patent Office | 2020

    Free access

    Control Strategy of Flywheel Energy Storage Arrays in Urban Rail Transit

    Wang, Yong / Li, Jin / Zhang, Gang et al. | Springer Verlag | 2022