Renewable Energy Systems

7	Power Factor Correction Implementing in AC/DC Converters

Power factor correction (PFC) is the capacity of generating or absorbing the reactive power produced by a load [1,2,3]. Power quality issues and regulations require rectifier loads connected to the utility to achieve high power factor. This means that PFC rectifier needs to draw close to a sinusoidal current in-phase with the supply voltage, unlike phase controlled rectifiers (making PFC rectifier “look like” resistive load to the utility).

7.1    INTRODUCTION

Refer to the formula [3]

$\text{PF}=\frac{\text{DPF}}{\sqrt{1+{\text{THD}}^2}}$

where

DPF is the displacement power factor

THD is the total harmonic distortion

We can explain DPF that the fundamental harmonic of the current has a delay angle θ (or ϕ), DPF = cosine ...