Title :
Analysis and simulation of digitally-controlled grid-connected PWM-converters using the space-vector average approximation
Author :
Lindgren, Michael B.
Author_Institution :
Dept. of Electr. Machines & Power Electron., Chalmers Univ. of Technol., Goteborg, Sweden
Abstract :
A technique to evaluate the dynamic performance of control principles for PWM-converter systems is presented. In the modelling of vector-controlled, grid-flux-oriented control systems, nonlinear switches and time-varying elements due to coordinate transformation occur in the feedback loop. By using space-vector averaging, coordinate transformations and nonlinear switches are avoided. A linear time-invariant analytical model in the grid-flux-oriented dq-frame is derived. Simulations with a switched PWM-model and an analytical model show accurate transient response and frequency response
Keywords :
PWM power convertors; circuit analysis computing; digital control; feedback; frequency response; state-space methods; time-varying networks; transient response; coordinate transformation; digital-control; discrete state space modelling; feedback loop; frequency response; grid-connected PWM-converters; grid-flux-oriented dq-frame; linear time-invariant analytical model; nonlinear switches; simulation; space-vector average approximation; switched PWM-model; time-varying elements; transient response; Analytical models; Control system synthesis; Control systems; Feedback loop; Frequency response; Nonlinear control systems; Pulse width modulation; Switches; Time varying systems; Transient response;
Conference_Titel :
Computers in Power Electronics, 1996., IEEE Workshop on
Conference_Location :
Portland, OR
Print_ISBN :
0-7803-3977-0
DOI :
10.1109/CIPE.1996.612341
