Converter control system having stable power transfer in the pre

Electric power conversion systems – Current conversion – Including an a.c.-d.c.-a.c. converter

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H01J 336

Patent

active

045787433

ABSTRACT:
A converter control system for DC power transmission line performs the following operation. When the DC current flowing through an inverter decreases to a value being smaller than a rated current value by a value in excess of a predetermined value, a reference voltage value determining the DC voltage of the inverter decreases. The decrease of this reference voltage value is limited to a given extent, so that a partial constant current characteristic portion appears at the voltage decreased portion in the DC voltage/current characteristic of the inverter. Then, an automatic voltage regulator of the inverter is rendered always active.

REFERENCES:
patent: 4320444 (1982-03-01), Hausler et al.
patent: 4330815 (1982-05-01), Konishi
patent: 4494179 (1985-01-01), Inokuchi et al.
Takenouchi et al, "Hokkaido-Honslu HVDC Link and Equipment for Hakodate Converter Station . . . ", Hitachi Review, vol. 28 (1979), No. 4, pp. 199-204.

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