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.
WU Zhi-wei*(吴志伟), ZHANG Jian-long (张建龙), ZHANG Xi (张希), YIN Cheng-liang (殷承良)
. Peak Current Control Strategy with Extended-State Tracking Compensator for DC-DC in Hybrid Energy Storage System[J]. Journal of Shanghai Jiaotong University(Science), 2013
, 18(2)
: 166
-172
.
DOI: 10.1007/s12204-013-1379-0
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