System for regulating the active power transferred into and out

Details System for regulating the active power transferred into and out System for regulating the active power transferred into and out

1997-10-15

1999-02-02

Wong, Peter S.

Electric power conversion systems

Current conversion

Including an a.c.-d.c.-a.c. converter

363 65, 307 87, H02J 336

Patent

active

058673750

ABSTRACT:
A system for transmitting power over a direct voltage network. A first power station connects one alternating voltage network to the direct voltage network. The first power station includes a converter for bidirectionally transferring power between the direct voltage network and the alternating voltage network. The converter maintains constant value of voltage on the network, or operates in a second alternative mode of controlling constant current between the alternating voltage network and the direct voltage network. When the voltage on the direct voltage network drops below a reference value, a second power station connected to the direct voltage network and to a remaining alternating voltage network takes over the voltage regulation function. The second power station prior to taking over the voltage regulating friction was in a current regulating function. In this way, when the first station reaches its limits of voltage regulation, the second station is enabled to take over the voltage regulating function switching out of a current regulating function.

REFERENCES:
patent: 4263517 (1981-04-01), Konishi
patent: 4648018 (1987-03-01), Neupauer
patent: 4727467 (1988-02-01), Bendl et al.
patent: 4941079 (1990-07-01), Ooi
patent: 5535113 (1996-07-01), Konishi

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