Circuit arrangement for starting up a converter having forced commutation with correct phase
AssigneeSiemens Aktiengesellschaft
InventorsJanos Udvardi-Lakos, Wolfgang Meissen
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Abstract
This invention relates to an inverter adapted to a fast start-up, preferably an inverter for power plants free from interruption. In the commutation devices of the valve branches of the inverter, there are two commutation capacitors which in stand-by are charged through chargers of opposite polarity. Upon receipt of a start-up order, the ignition pulses of a concurrent control device are released and by the first commutation, the commutation capacitor being switched on in the commutation device of the first commutating valve is the one the pre-charge of which has the required proper polarity. During further operation the two commutation capacitors are operated in parallel.
Claims3
A converter circuit arrangement comprising:
- a power stage including:
- controlled main valves;
- commutation means associated with said valves, said commutation means comprising two energy storage devices;
- a charging means for charging said energy storage devices to opposite polarities during stand-by position of said converter circuit;
- means for providing for commutation of the energy of the energy storage device whose polarity is associated with the valve whose firing pulse is being generated;
- and means for connecting said energy storage devices in parallel during power operation of said converter;
- and a continuously running control apparatus for controlling said power stage including:
- a drive unit for generating firing pulses and adapted to be fed by a regulating device;
- and a starting device adapted to receive a starting command and including a first release unit for controlling the releasing of said firing pulses to said valves.
Dependencies are inferred from the claim text.