Input-output linearization control of single-phase buck-boost power factor corrector

Abstract

In this paper, simulations of single — phase power factor corrector (PFC) that has buck-boost circuit topology under input — output linearization nonlinear control with current and voltage control are realized. Buck-boost converter is connected to ac grid by single phase diode bridge rectifier and it works in boundary conduction mode (BCM). For switching of single switched buck-boost converter, compared saw tooth with dc control signal (PWM) technique has been utilized and switching frequency adjusted to 100 kHz. Simulations are carried out with Matlab/Simulink. By the simulations, the effect of PFC buck-boost rectifier on unity power factor, line current harmonic distortion, the sinusoidality of line current and dc — link voltage are presented.