Power Factor Correction (PFC) single-phase AC/DC converters are used in several power electronics applications as full wave control rectifiers improving power quality and providing high standards of efficiency. Many papers dealing with the description or use of such topologies have been published in recent years; however, a review that describes and organizes their specific details has not been reported in the technical literature. Therefore, this paper presents an extensive review of PFC single-phase AC/DC converters operating with the Boost converter topology for low and medium voltage as well as and power appliances. A categorization of bridge, semi-bridgeless, and bridgeless, in accordance with the construction characteristics, was carried out in order to unify the technical terminology. Benefits and disadvantages are described and analyzed in detail. Furthermore, a comparison performance in terms of PFC, Total Harmonic Distortion (THD), power capacity, electromagnetic compatibility (EMC), number of elements, and efficiency is included.

This paper proposes the FTFT for the real-time monitoring of modern power grids through dynamic harmonic estimations. The FTFT results from the DTTFT implemented with the FFT, instead of its filter bank implementation. In FTFT, the harmonic Taylor-Fourier coefficients are obtained in batch, and from these complex coefficients, estimates of frequency, amplitude, and RoCoF are obtained. The FTFT is embedded in two low-cost platforms, one consisting of a digital signal processor (DSP) coded using C programming language, and a development PMU (D-PMU); where a computationally efficient calculation of the FTFT is coded in both platforms. Both platforms process instantaneous voltage and current signals, rendering phasor and harmonic estimates as if they were extracted by the impulse response of a set of FIR filters and their first and second differentiators of the DTTFT. The phasor and harmonic estimations are accomplished using a sliding window that updates sample by sample, instantaneously providing amplitude, phase, frequency, and RoCoF estimations at the fundamental and harmonic frequencies with a high reporting rate. Experimental results confirm the proposition's performance, precision, and effectiveness under steady-state conditions, sudden changes, and harmonic analysis.

This article proposes a fast-response sliding mode controller for a semibridgeless boost converter under large and quick load fluctuations to ensure tight output voltage regulation and unity power factor correction at the line side. In this sense, a novel approach for estimating the reference current profile is presented focusing on the real-time phasor estimation via the O-splines of the discrete-time Taylor-Fourier transform. This method allows for improving the computational efficiency and dynamic performance of the estimations of amplitude, frequency, and phase of the network voltage used for the generation of the reference current profile. Several aspects of the controller design are discussed, including the choice of the sliding surface, the existence and stability conditions, and the implementation of an adaptive hysteresis band to fix the switching frequency and reduce zero-crossing distortion. Experimental results of a GaN-based prototype validate the theoretical predictions, exhibiting a power factor close to 1 and a total harmonic distortion lower than 3.2% in presence of load changes of up to 50% and changes in the output voltage set point. Several comprehensive experimental comparisons between the proposed framework and the most widely used methods recently reported in the literature are accomplished in terms of transitory and steady-state responses. The robustness of the proposed control approach is experimentally demonstrated under sag conditions and a wide operating range of the input voltage.