Enhanced automatic-power-decoupling control method for single-phase AC-to-DC converters

Sinan Li, Wenlong Qi, Siew-Chong Tan, S. Y. Ron Hui

Research output: Contribution to journalArticlepeer-review

68 Citations (SciVal)


Existing control schemes for single-phase ac-to-dc converters with active power-decoupling function typically involve a dedicated power-decoupling controller. Due to the highly coupled and nonlinear nature of the single-phase system, the design of the power-decoupling controller (typically based on the small-signal linear control techniques) is cumbersome, and the control structure is complicated. Additionally, with the existing power-decoupling control, it is hard to achieve satisfied dynamic responses and robust circuit operation. Following a recently proposed automatic-power-decoupling control scheme, this paper proposes a nonlinear control method that can achieve enhanced large-signal dynamic responses with strong disturbance rejection capability without the need for a dedicated power-decoupling controller. The proposed controller has a simple structure, of which the design is straightforward. The control method can be easily extended to other single-phase ac-to-dc systems with active power-decoupling function. Simulation and experimental results validate the feasibility of the proposed control method on a two-switch buck-boost PFC rectifier prototype.
Original languageEnglish
Pages (from-to)1816-1828
Number of pages13
JournalIEEE Transactions on Power Electronics
Issue number2
Early online date29 Mar 2017
Publication statusPublished - 28 Feb 2018


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