Control scheme for source voltage sensorless PWM converters under source voltage unbalance

Author

Eunsoo Jung ; Myoungho Kim ; Seung-Ki Sul

Author_Institution

Sch. of Electr. Eng., Seoul Nat. Univ., Seoul, South Korea

fYear

2011

fDate

Aug. 30 2011-Sept. 1 2011

Firstpage

1

Lastpage

10

Abstract

This paper presents a control scheme for three-phase PWM converters which have no ac-side voltage sensors. In spite of no source voltage sensors, the proposed method estimates exact grid angle and voltages, which are the essential parts for the power transfer between DC link of PWM converter and AC source. The method works not only in normal balanced AC source case but also in faulty unbalanced cases. The validity of proposed method has been evaluated by computer simulation and experimental result with 10kW PWM Voltage source converter.

Keywords

PWM power convertors; sensorless machine control; DC link; PWM converters; power 10 kW; power transfer; sensorless control scheme; voltage source converters; Current control; Cutoff frequency; Frequency control; Observers; Pulse width modulation converters; Sensorless control; Voltage control; Estimation technique; Sensorless control; Three-phase system; Voltage Source Converter (VSC);

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Applications (EPE 2011), Proceedings of the 2011-14th European Conference on

Conference_Location

Birmingham

Print_ISBN

978-1-61284-167-0

Electronic_ISBN

978-90-75815-15-3

Type

conf

Filename

6020545