| Title |
A Disturbance Observer-Based Load Current Estimation Method for Ups Inverter Applications |
| Authors |
장재영(Jang, Jae-Young) ; 이교범(Lee, Kyo-Beum) ; 송중호(Song, Joong-Ho) ; 최익(Choy, Ick) ; 유지윤(Yoo, Ji-Yoon) ; 최주엽(Choi, Ju-Yeop) |
| Keywords |
dead-beat control ; UPS ; disturbance observer ; single-phase PWM inverter |
| Abstract |
Design and analysis of disturbance observer-based deadbeat control fur single-phase inverter applications are comprehensively presented in this paper. Load current can be estimated by disturbance observer, which is basically structured with the first order equation in this case and is regarded as a relatively simple method in comparison with conventional full-order Luenberger observer. Also, an inherent one-step delay problem appeared in the deadbeat control method is overcome by a simple prediction technique proposed. Output voltage dip is reduced by the feedforward control with the change rate of the estimated load current involved in the deadbeat current control loop. The proposed algorithms are verified by the respective simulation and experiment results. |