Abstract
A novel method for controlling direct voltage regulated active dc-link capacitance reduction circuits (ACRC) is proposed in this paper. Instead of forcing the dc-link voltage of the power conversion system to follow a constant reference, the ACRC imposes dc-bus voltage in proportion to the integral of its input current. Consequently, it resembles an adjustable value capacitor from the dc-link side. Therefore, as opposed to existing control strategies, the proposed method simultaneously allows the dc-link voltage to reflect the power balance of the system and the pulsating power component to be diverted into significantly reduced auxiliary capacitance via a bidirectional dc-dc converter. As a result, replacing bulk dc-link capacitance by the proposed circuitry does not require any modification of existing grid-connected power conversion system controllers, thus allowing plug-and-play operation. The proposed approach is validated by application to a commercial power factor correction front end by both simulations and experiments.
| Original language | English |
|---|---|
| Article number | 8469167 |
| Pages (from-to) | 6527-6537 |
| Number of pages | 11 |
| Journal | IEEE Transactions on Industrial Electronics |
| Volume | 66 |
| Issue number | 8 |
| DOIs | |
| State | Published - 1 Aug 2019 |
Keywords
- Active capacitor emulation
- dc-link capacitance reduction
- grid-interfacing converters
ASJC Scopus subject areas
- Control and Systems Engineering
- Electrical and Electronic Engineering