Title :
High-performance direct-frequency converters controlled by predictive-current loop
Author :
Wiechmann, Eduardo P. ; Garcia, Ariel R. ; Salazar, Lautaro D. ; Rodriguez, Jose R.
Author_Institution :
Dept. of Electr. Eng., Concepcion Univ., Chile
fDate :
5/1/1997 12:00:00 AM
Abstract :
Two predictive space-vector control strategies for direct-frequency converter (DFC) structures are presented. Both algorithms require output-current feedback in order to decide the next best state of the power converter. The performance of the control techniques is compared with a high-performance fictitious-link DFC. Computer simulation using Microsim PSpice 5.3 is used to examine the operation of the DFC converter algorithms. The evaluation is performed for a wide-operational output frequency and includes input/output-voltage ratio, commutation frequency, input-current balance, input-current total harmonic distortion (THD) and input power factor. From these results, the high performance exhibited by the proposed algorithms is verified
Keywords :
AC-AC power convertors; circuit analysis computing; commutation; control system analysis computing; electric current control; feedback; frequency convertors; harmonic distortion; power system harmonics; predictive control; software packages; Microsim PSpice 5.3; algorithms; circuit simulation; commutation frequency; computer simulation; control simulation; direct-frequency converters; input power factor; input-current balance; input-current total harmonic distortion; input/output-voltage ratio; output-current feedback; predictive current control loop; space-vector control strategies; Digital-to-frequency converters; Frequency; Output feedback; Pulse width modulation inverters; Rectifiers; Signal synthesis; State feedback; Switches; Transfer functions; Voltage control;
Journal_Title :
Power Electronics, IEEE Transactions on
