Title :
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
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;
Conference_Titel :
Industry Applications Conference, 2003. 38th IAS Annual Meeting. Conference Record of the
Print_ISBN :
0-7803-7883-0
DOI :
10.1109/IAS.2003.1257794
