TY - JOUR
T1 - Nonlinear Control of Electronic Capacitor for Enhanced Stability and Dynamic Response
AU - Mutovkin, Alexei
AU - Yuhimenko, Vladimir
AU - Schacham, Shmuel
AU - Kuperman, Alon
N1 - Publisher Copyright:
© 1982-2012 IEEE.
PY - 2021/8
Y1 - 2021/8
N2 - This article focuses on improving the control structure of electronic capacitor (EC), formed by a bidirectional dc-dc converter terminated with small auxiliary capacitance. Typical application of such a system is mimicking the dynamic behavior of a bulk dc-ink capacitor while actually employing a component with much lower capacitance value. It was previously revealed that EC may be treated as output-voltage regulated wide-input-range converter feeding a bidirectional power load. Dual-loop voltage-current linear cascaded regulator, typically employed for EC terminal voltage control, imposes slow unstable mode when absorbing power from the dc-link. This article demonstrates that performing a transformation from voltage-current to power-energy domain by feedback linearization-based nonlinear control simultaneously eliminates the unstable mode and increases control bandwidth. Revealed findings are well-supported by simulations and experiments.
AB - This article focuses on improving the control structure of electronic capacitor (EC), formed by a bidirectional dc-dc converter terminated with small auxiliary capacitance. Typical application of such a system is mimicking the dynamic behavior of a bulk dc-ink capacitor while actually employing a component with much lower capacitance value. It was previously revealed that EC may be treated as output-voltage regulated wide-input-range converter feeding a bidirectional power load. Dual-loop voltage-current linear cascaded regulator, typically employed for EC terminal voltage control, imposes slow unstable mode when absorbing power from the dc-link. This article demonstrates that performing a transformation from voltage-current to power-energy domain by feedback linearization-based nonlinear control simultaneously eliminates the unstable mode and increases control bandwidth. Revealed findings are well-supported by simulations and experiments.
KW - Active dc-link capacitor
KW - grid-interfacing converters
KW - nonlinear control
UR - http://www.scopus.com/inward/record.url?scp=85098600764&partnerID=8YFLogxK
U2 - 10.1109/TIE.2020.3000099
DO - 10.1109/TIE.2020.3000099
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AN - SCOPUS:85098600764
SN - 0278-0046
VL - 68
SP - 6881
EP - 6892
JO - IEEE Transactions on Industrial Electronics
JF - IEEE Transactions on Industrial Electronics
IS - 8
M1 - 9113714
ER -