Title :
Indirect current control scheme in PWM voltage-sourced converter
Author :
Choi, Jae-Ho ; Kim, Hyong-Cheol ; Kwak, Joo-Sik
Author_Institution :
Sch. of Electr. & Electron. Eng., Chung-Buk Nat. Univ., Cheongju, South Korea
Abstract :
An indirect current control scheme for a PWM voltage source converter is proposed in this paper. The main advantages of this proposed system are that the sinusoidal line current waveforms with near unity power factor and the ripple-free DC output voltage waveform are achieved without any current sensors. The mathematical model based on the space vector is derived and the principle of the indirect current control is described. From the comparison of the simulation and experimental results between the direct current control scheme and the indirect current control scheme, the validity of this proposed indirect current control is verified
Keywords :
PWM power convertors; electric current control; power factor; voltage control; AC input current regulation; DC output voltage regulation; PWM voltage-sourced converter; direct current control; indirect current control scheme; mathematical model; near unity power factor; ripple-free DC output voltage waveform; sinusoidal line current waveforms; space vector; Control systems; Current control; Inductors; Mathematical model; Pulse width modulation; Pulse width modulation converters; Reactive power; Rectifiers; Sensor systems; Voltage;
Conference_Titel :
Power Conversion Conference - Nagaoka 1997., Proceedings of the
Conference_Location :
Nagaoka
Print_ISBN :
0-7803-3823-5
DOI :
10.1109/PCCON.1997.645625
