Method for placing into operation a series connected group of st

Details Method for placing into operation a series connected group of st Method for placing into operation a series connected group of st

1981-06-01

1984-01-31

Wong, Peter S.

Electric power conversion systems

Current conversion

Having plural converters for single conversion

363 51, 363 35, H02J 336, H02H 700

Patent

active

044293577

ABSTRACT:
In order to place into operation a group of power converters which are connected in series as concerns the direct-current mode and in parallel as concerns the alternating-current mode, of a power or current converter operating in a rectifying mode of a high-voltage direct-current transmission installation, the control pulses of the group of power converters to be placed into operation are set at a range of approximately 100 to 115 electrical degrees. The bypass or shunt switch of such group of power converters subsequently receives an opening command. The control pulses, after accomplishment of opening of the bypass or shunt switch are shifted in accordance with a predetermined linear ramp function in the rectifying range and thereafter the control pulses are delivered by means of a pole current regulator. The placement into operation of a power converter operating in the inverting mode is accomplished in a similar fashion. Reactive power swings or fluctuations between the network and the power converters are avoided.

REFERENCES:
patent: 3499165 (1970-03-01), Madzarevic et al.
patent: 3629685 (1971-12-01), Johansson
patent: 4020411 (1977-04-01), Tsuboi et al.
patent: 4181932 (1980-01-01), Fujiwara
Kimbark, "Direct Current Transmission", vol. 1, Wiley-Interscience, a division of John Wiley & Sons, Inc. (1971), pp. 167-169.

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