Occurrence and suppression of DC-flux deviations in a doubly-fed flywheel generator system

Author

Fujita, Hideaki ; Akagi, Hirofumi ; Tan, Mitsugi ; Ogasawara, Satoshi

Author_Institution

Tokyo Inst. of Technol., Japan

Volume

3

fYear

2003

fDate

12-16 Oct. 2003

Firstpage

1766

Abstract

This paper deals with DC-flux deviations occurring in a doubly-fed flywheel generator with stator-current feedback control. An AC output voltage of the PWM inverter connected to the rotor produces the DC-flux deviations in the stator. It is difficult to detect the DC flux from the stator current and/or voltage, because the DC flux induces no electromotive force on the stator windings. This paper proposes a new control method for suppressing the DC flux deviations based on calculating the magnetizing current from the stator and rotor currents. Experimental results verify the viability of the proposed control method.

Keywords

AC generators; PWM invertors; electric current control; feedback; flywheels; induction motors; machine control; magnetic flux; magnetisation; rectifying circuits; rotors; stators; 7.5 kW; AC output voltage; DC-flux deviations; PWM inverter; doubly-fed flywheel generator system; electromotive force; magnetizing current; rotor; slip rings; stator current; stator voltage; stator-current feedback control; voltage-source PWM rectifier-inverter system; wound-rotor induction motor; Feedback control; Flywheels; Induction generators; Induction machines; Magnetic flux; Pulse width modulation; Pulse width modulation inverters; Rotors; Stator windings; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Conference, 2003. 38th IAS Annual Meeting. Conference Record of the

Print_ISBN

0-7803-7883-0

Type

conf

DOI

10.1109/IAS.2003.1257794

Filename

1257794