Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Dead Time Compensation of Grid-connected Inverter Using Resonant Controller
Authors Sang-Hyup Han ; Jong-Hyoung Park ; Heung-Geun Kim ; Honnyong Cha ; Tea-Won Chun ; 魯Eui-Cheol Nho
DOI 10.6113/TKPE/2011.16.6.569
Page pp.569-576
ISSN 1229-2214
Keywords Dead time compensation; dead time effects; proportional-resonant(PR) controller; PWM inverter; resonant controller
Abstract This paper proposes a new dead time compensation method for a PWM inverter. Recently, PWM inverters are extensively used for industry applications, such as ac motor drives, distributed grid-connected systems and a static synchronous compensator (STATCOM). Nonlinear characteristics of the switch and the inverter dead time cause a current distortion and deterioration of power quality. The dominant harmonics in the output current are the 5th and 7th harmonics in the stationary frame, and the 6th harmonics in the synchronous rotating frame. In this paper, a resonant controller which compensates the 6th harmonics in the synchronous rotating frame is proposed. This method does not require any off-line experimental measurements, additional hardware and complicated mathematical computations. Furthermore, the proposed method is easy to implement and does not cause any stability problem.