Title :
Novel SVPWM-based predictive current controller for three-phase grid-connected inverters
Author :
Zeng, Qingrong ; Chang, Liuchen
Author_Institution :
Dept. of Electr. & Comput. Eng., New Brunswick Univ., Fredericton, NB
Abstract :
Space vector pulse-width modulation (SVPWM) is widely used in the current control of three-phase voltage-source inverters (VSI). However, in grid-connected distributed generation (DG) systems, SVPWM also brings drawbacks to current controllers, such as the compromised output current due to the grid harmonic disturbance and nonlinearity of the system, the lack of inherent over-current protection, etc. In this paper, a novel SVPWM-based predictive current control strategy is proposed for three-phase grid-connected VSI and verified by simulation using PSIM simulation package. The simulation results prove that the proposed current controller offers a high performance even under the influence of the grid harmonics. At the same time, the employed dual-timer sampling scheme not only minimizes the system control delay but also offers an improved response for over-current protection to the system
Keywords :
PWM invertors; distributed power generation; electric current control; power grids; predictive control; SVPWM; dual-timer sampling scheme; grid harmonics; grid-connected distributed generation; predictive current controller; space vector pulse-width modulation; three-phase grid-connected inverters; three-phase voltage-source inverters; Control systems; Current control; Distributed control; Nonlinear control systems; Predictive models; Protection; Pulse inverters; Pulse modulation; Pulse width modulation inverters; Space vector pulse width modulation;
Conference_Titel :
Electrical and Computer Engineering, 2005. Canadian Conference on
Conference_Location :
Saskatoon, Sask.
Print_ISBN :
0-7803-8885-2
DOI :
10.1109/CCECE.2005.1557206