비례-공진 모델과 데드비트 제어기를 이용한 능동전력필터의 개선된 고조파 보상 기법

Abstract

In grid-connected system, harmonics due to nonlinear loads such as power converters and motors are injected into the grid current, causing distortion, lowering the power factor and directly affecting power quality problems. To solve the power quality problems, many studies about Active Power Filter(APF) has been introduced. So in this paper, an improved harmonic compensation method of Shunt Active Power Filter(SAPF) by using Proportional-Resonance(PR) model and Deadbeat controller is proposed. This paper deals with the theoretical analysis necessary to avoid the phase delay while accurately extracting the fundamental component of the load side current which includes harmonics by using the PR model. And the dynamics and reliability of current control are improved by using the Deadbeat controller which considers the grid side parasitic components causing the mutual interference components in the d-q axis current. So simulations and experiments are carried out to verify the feasibility of the proposed harmonic compensation method.