Title :
A three-phase synchronous frame controller for unbalanced load [invertor operation]
Author :
Hsu, Ping ; Behnke, Michael
Author_Institution :
Dept. of Electr. Eng., San Jose State Univ., CA, USA
Abstract :
A new control scheme for three-phase inverters is presented in this paper. This control scheme is able to completely compensate for the effect of load imbalance. The controller consists of two PI controllers in two reference frames rotating in opposite directions. These two reference frames extract both positive and negative sequence components of the output voltage. The controller for the negative sequence components effectively compensates for the effect of load imbalance. Both simulation and experimental results are included
Keywords :
DC-AC power convertors; PWM invertors; compensation; control system analysis; control system synthesis; load (electric); two-term control; voltage control; PI controllers; PWM stage; control design; control performance; control simulation; load imbalance compensation; negative sequence components; output voltage regulation; positive components; reference frames; three-phase inverters; three-phase synchronous frame controller; unbalanced load operation; Error correction; Force feedback; Frequency; Inverters; Pi control; Proportional control; Pulse width modulation; Resistors; State feedback; Voltage control;
Conference_Titel :
Power Electronics Specialists Conference, 1998. PESC 98 Record. 29th Annual IEEE
Conference_Location :
Fukuoka
Print_ISBN :
0-7803-4489-8
DOI :
10.1109/PESC.1998.703214
