Mobile QR Code QR CODE : The Transactions of the Korean Institute of Electrical Engineers
Title Low-Order Harmonics Cancellation for Three-Phase Grid-Connected Inverters Using a Band Pass Filter
Authors 안상원(Sang-Won An) ; 김석민(Seok-Min Kim) ; 조성준(Sungjoon Cho) ; 이교범(Kyo-Beum Lee)
DOI https://doi.org/10.5370/KIEE.2020.69.1.27
Page pp.27-36
ISSN 1975-8359
Keywords Low-order harmonics; Grid-connected inverter; Band pass filter; Fundamental wave
Abstract This paper proposes a novel control method to effectively reduce the low-order harmonics contained in the grid current. When different kinds of loads or non-linear loads are connected to the Point of Common Coupling(PCC), harmonics are generated in the grid voltage, which causes output current distortion of inverter. This current distortion causes reduced efficiency and resonance of the power converter. In general, to reduce the current distortion, a low-order harmonic cancellation technique is used using proportional-integral control and low-pass filter. This method cannot effectively remove the harmonic component of the grid current due to the effect of the fundamental wave. In this paper, an effective harmonic control method is proposed, in which the effects by fundamental wave components have been removed. Simulation and experimental results verify the effectiveness and validity of proposed method