Analysis of Battery Lifetime Extension in a Small-Scale Wind-Energy System Using Supercapacitors

Due to the variable characteristics of renewable generation, batteries used in renewable-power systems can undergo many irregular, partial charge/discharge cycles. In turn, this can also have a detrimental effect on battery lifetime and can increase project costs. This study presents a method of imp...

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Bibliographic Details
Published in:IEEE transactions on energy conversion 2013-03, Vol.28 (1), p.24-33
Main Authors: Gee, A. M., Robinson, F. V. P., Dunn, R. W.
Format: Article
Language:English
Subjects:
Batteries
Control algorithms
Discharges (electric)
energy storage
Inductors
Mathematical model
Studies
Supercapacitors
Switches
wind power generation
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Summary:Due to the variable characteristics of renewable generation, batteries used in renewable-power systems can undergo many irregular, partial charge/discharge cycles. In turn, this can also have a detrimental effect on battery lifetime and can increase project costs. This study presents a method of improving battery lifetime in a small-scale remote-area wind-power system by the use of a battery/supercapacitor hybrid energy storage system. The supervisory control algorithm and hardware implementation are described and projected long-term benefits of the proposed system are assessed by simulation. A representative dynamic model of the overall system, incorporating realistic wind-speed and load-power variations has been developed. An analysis is presented of the potential improvement in battery lifetime that is achievable by diverting short-term charge/discharge cycles to a supercapacitor energy-storage system. This study introduces a method by which supercapacitor energy storage systems and control algorithms can be evaluated and implemented in the application area considered. The composition of a prototype test system is described and experimental results are presented to demonstrate system feasibility.
ISSN:0885-8969
1558-0059
DOI:10.1109/TEC.2012.2228195