Abstract
The bi-directional boost type improved power quality ac-dc converter (IPQC) is capable of providing transformerless power transfer between a high voltage dc (HVDC) link and a relatively low voltage ac system with improved power quality at input ac mains in terms of high power factor and low total harmonic distortion (THD). The current forced control (CFC) strategy is implemented in the single- phase half-bridge topology of the IPQC with closed loop control, adopting the hysteresis-band current control (HCC) pulse width modulation (PWM) technique. This paper presents unity power factor operations, in the rectification and inversion modes, with near sinusoidal line currents; of the IPQC that employs power MOSFETs. Simulation results confirm the efficacy of the control technique.
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