Power conversion equipment

Details Power conversion equipment Power conversion equipment

1982-12-15

1985-05-14

Wong, Peter S.

Electric power conversion systems

Current conversion

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

363 37, 363 51, 363 79, H02J 336

Patent

active

045176345

ABSTRACT:
In the frequency control mode, a switch is ON. A power difference is fed back to an adder through a limiter and is compared with an output from a power setter. A difference signal from the adder is supplied to an adder to obtain a difference with detected power. By the feedback loop, the preset power is set to be substantially equal to the detected power. While the difference is greater than a predetermined value, an output from a level detector is at logic level "0". Even if a mode switch instruction is received in this state, an AND gate does not produce an output signal and the mode changing is not performed.

REFERENCES:
patent: 3470442 (1969-09-01), Ainsworth
Patent Abstracts of Japan vol. 2, No. 61 9 May 1978 pp. 1700E78 & AP-A-53-24542.
International Conference on Large High Voltage Electric Systems 14-03 "Hokkaido-Honshu HVDC Link", T. Takenouchi; Aug. 27, 1980.

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