Title :
Stability improvement of constant voltage transformer for triport UPS system
Author :
Harada ; Ji, Y. ; Katayama, Y. ; Chen, C.J. ; Nakamizo, T.
Author_Institution :
Dept. of Electron., Kyushu Univ., Fukuoka, Japan
fDate :
30 Oct-2 Nov 1988
Abstract :
A novel method for improving the stability of the AVR (automatic voltage regulator) constant voltage transformer for triport UPS (uninterruptible power supply) systems is introduced. An active filter with an operational amplifier as the feedback element for controlling the AVR is shown to reduce the system instability; this device is more compact and economical than the alternative magnetic feedback amplifier. Experimental and simulation results demonstrate the effectiveness of active filter feedback of a higher order for suppressing the instability
Keywords :
active filters; feedback; operational amplifiers; potential transformers; stability; uninterruptible power supplies; voltage control; voltage regulators; active filter; automatic voltage regulator; constant voltage transformer; feedback element; operational amplifier; simulation results; stability; stability improvement; triport UPS system; uninterruptible power supply; Active filters; Automatic control; Control systems; Feedback; Operational amplifiers; Power system economics; Regulators; Stability; Uninterruptible power systems; Voltage transformers;
Conference_Titel :
Telecommunications Energy Conference, 1988. INTELEC '88., 10th International
Conference_Location :
San Diego, CA
DOI :
10.1109/INTLEC.1988.22404
