Modeling and control of a boost converter for pseudo-resistive Input behavior

Abstract

In this paper we present the analysis and development of a boost-type switching converter for efficient power conversion from a source with an arbitrary voltage waveform containing multiple frequencies to a DC storage medium such as a battery. This type of energy transfer is of great interest in various green energy conversion technologies involving irregular sources of power such as wave and wind with time-varying amplitudes and frequencies. Motivated by these applications, a novel modeling and control scheme is developed for a pulse-width-modulated (PWM) boost converter. In particular, conditions under which the converter would act as a pseudo-resistor as seen by an arbitrary input voltage source are derived. Based on the pseudo-resistive relationship obtained between the input voltage and current a feedback controller is developed that regulates the converter input resistance to a desired value. The importance of this result is that power absorption can be controlled with unity power factor by controlling the input resistance of the converter for an arbitrary band-limited input voltage. Numerical simulations are presented that evaluate performance of the proposed modeling scheme and control system. I. INTRODUCTIONThe conventional methods for converting AC to DC are not sufficient to meet the requirements in high efficiency power applications. Hence, various switch-mode boost converters have been developed for efficient power conversion. In [1]-[3], an input power factor correction method that uses a closedloop active current waveshaping technique was presented. A boost converter topology for applications involving higher line frequencies was introduced in [4] to eliminate the leadingphase distortion of the line current at higher line frequencies.Another boost converter topology was presented in [5], which reduces the reverse-recovery loss of the diode by adding a simple inductor-diode branch in parallel with the output diode. Different solutions for reducing the reverse-recovery loss in boost converters were addressed in [6]- [8]. Mixedmode operation of a boost switch-mode rectifier for a wide range of load variations was proposed in [9]. In [10], the authors classified single-stage converters according to the input AC source frequency and the existence or absence of a large bulk capacitor in their DC link. In [11], the authors discussed advantages and drawbacks of popular boost converters and control strategies. In [12], a single-phase PFC was presented

Modelling and sliding‐mode control of a single‐phase single‐stage converter with application to plug‐in electric vehicles

“…In charging mode, the power electronic interface between the grid and the battery acts as a rectifier and a boost‐type AC–DC converter to rectify the input AC voltage of the utility grid and boost it up to high voltage level needed for the battery pack to charge the battery [25, 26]. Based on our proposed switching scheme there are four different modes of operation when the battery is charging through utility grid (G2V).…”