Abstract
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.
Original language | American English |
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Article number | 9113714 |
Pages (from-to) | 6881-6892 |
Number of pages | 12 |
Journal | IEEE Transactions on Industrial Electronics |
Volume | 68 |
Issue number | 8 |
DOIs | |
State | Published - 1 Aug 2021 |
Keywords
- Active dc-link capacitor
- grid-interfacing converters
- nonlinear control
All Science Journal Classification (ASJC) codes
- Control and Systems Engineering
- Electrical and Electronic Engineering