Battery energy storage system state-of-charge management to ensure availability of frequency regulating services from wind farms

RENEWABLE ENERGY

卷:160

Article

Boyle, James^1,2  Littler, Timothy¹  Foley, Aoife³ 

[1] Queens Univ Belfast, Sch Elect Elect Engn & Comp Sci, Belfast BT9 5AH, Antrim, North Ireland

[2] Galway Mayo Inst Technol, Sch Engn, Dublin Rd, Galway H91 T8NW, Ireland

[3] Queens Univ Belfast, Sch Mech & Aerosp Engn, Belfast BT9 5AH, Antrim, North Ireland

关键词: Battery energy storage;    Wind generation;    Frequency control;    State of charge control;    Fuzzy logic control;   

DOI  :  10.1016/j.renene.2020.06.025

来源: Elsevier

【 摘 要 】

State of charge management in battery energy storage systems will be imperative to ensure that frequency regulating services can be provided when required. Two state of charge controllers are proposed as a comparison analysis in this research. One controller was designed to meet the charge/discharge requirements imposed on assets providing enhanced frequency response. This controller makes small corrective changes to the battery's power output to restore nominal charge. Simulation results show that the controller is effective at restoring nominal charge when the deviation from nominal is small. However, when the charge is significantly high or low, operating within the confines of the enhanced frequency response service envelope will lead to long periods where the charge is above or below nominal. This will reduce the availability of frequency regulating services from the system. A second controller is proposed to accelerate the restoration of nominal charge. This controller is intended for use in wind farms that have an integrated battery energy storage system, whereby hybrid dispatch control can be employed. The objective of hybrid control is to create a power exchange between the wind turbine and battery system to accelerate nominal charge restoration, without significantly impacting system frequency and the wind farm's output. (C) 2020 Published by Elsevier Ltd.

【 授权许可】

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