Electric power conversion systems – Current conversion – Including an a.c.-d.c.-a.c. converter
Patent
1989-11-01
1991-04-23
Stephan, Steven L.
Electric power conversion systems
Current conversion
Including an a.c.-d.c.-a.c. converter
363 71, 323207, 307 58, 307 82, H02M 545, H02J 306
Patent
active
050104675
ABSTRACT:
A coupling system in which power converters are coupled through a DC circuit to exchange active power between the converters comprises a control apparatus for controlling active power exchanged between each converter and its AC system. The control apparatus includes an automatic active power regulator for regulating active power exchanged between the converters and the AC system to be equal to be predetermined active power reference value, and an automatic DC voltage regulator for regulating a DC voltage of the DC circuit to be equal to a predetermined DC voltage reference value. When an output signal from the automatic active power requlator of each converter is input as an upper limit value of an output signal from the automatic DC voltage regulator, a DC voltage reference value of one converter is set to be equal to or larger than a DC voltage reference value of the remaining power converter.
REFERENCES:
patent: 4251736 (1981-02-01), Coleman
patent: 4517634 (1985-05-01), Sakai
patent: 4639848 (1987-01-01), Sakai
"Semiconductor Power Conversion Circuit, " Special Committees on Method for Semiconductor Conversion of Institute of Electrical Engineering, Mar. 31, 1987 (pp. 211-212) (pp. 216-217).
Hirose Syun-ichi
Ichikawa Fumitoshi
Inokuchi Haruhisa
Nakamura Naomi
Tokiwa Yukio
Kabushiki Kaisha Toshiba
Stephan Steven L.
The Tokyo Electric Power Co. Inc.
Todd Voeltz Emanuel
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