Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source
Patent
1975-09-26
1977-11-15
Beha, Jr., William H.
Electrical transmission or interconnection systems
Plural supply circuits or sources
Substitute or emergency source
363 49, 363136, H02J 906
Patent
active
040587380
ABSTRACT:
The invention concerns an apparatus and method for starting-up, with the correct phase, a converter having forced commutation. More particularly the converter comprises a power stage having controlled main valves and commutation devices associated with the valves. The converter also comprises a control apparatus which includes a drive unit synchronized with a power line voltage for generating firing pulses for the converter valves and a regulating device preceding the drive unit. In accordance with the invention, at least one energy storage device is charged in the stand-by position with an amount of energy required for commutation. Also in the stand-by position, the firing pulses generated by the drive unit of the continuously running control apparatus are blocked from their respective converter valves. Upon a starting command, the stored energy in the storage device is made available for commutation and the firing pulses are released to their respective valves.
REFERENCES:
patent: 3401327 (1968-09-01), Leppert
patent: 3703644 (1972-11-01), Thorborg
patent: 3818272 (1974-06-01), Rich
Beha Jr. William H.
Siemens Aktiengesellschaft
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