Abstract
Because variations of ultra-capacitor voltage and battery voltage generate subharmonic and chaotic behaviors in hybrid energy storage system (HESS) application when a DC-DC converter is under the peak current control, a novel digital control strategy, i.e., peak current control with extended-state tracking compensator, is introduced to deal with the stability. The gains of the control algorithm are selected based on pole locations formulated from the Bessel filter. The simulation results validate that under the peak current control strategy with compensator, the DC-DC converter does not have the subharmonic and chaotic behaviors. The response time under the peak current control with compensator is the same as that under the peak current control. The ripple voltage and ripple current of battery are less. The tracking error of inductor current tends to zero.
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Foundation item: Research Fund on the Cutting-Edge Technology of Electrical Vehicles towards the Sino-US clean Energy Cooperation
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Wu, Zw., Zhang, Jl., Zhang, X. et al. Peak current control strategy with extended-state tracking compensator for DC-DC in hybrid energy storage system. J. Shanghai Jiaotong Univ. (Sci.) 18, 166–172 (2013). https://doi.org/10.1007/s12204-013-1379-0
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DOI: https://doi.org/10.1007/s12204-013-1379-0
Key words
- chaotic behavior
- hybrid energy storage system (HESS)
- DC-DC converter
- current control
- extendedstate tracking compensator