Static Frequency Converter (SFC)

Sensor-free synchronous start-up

Innovative, sensor-free Static Frequency Converters: thyristor power electronic converters used in pumped-storage power plants and gas turbines.

The SFC starts a synchronous machine smoothly, bringing it up to synchronous speed without dipping the switchgear busbar voltage.

Pumped-storage plantsGas turbine start-upSensor-freeSynchronous start-up

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Variable voltage & frequency to the stator

Operation

How it works

The SFC draws power at constant voltage and frequency from an external source.

Thyristor converters turn it into variable voltage and frequency to supply the stator of the synchronous machine.

The machine gradually accelerates until it reaches synchronous rotation.

Where it is used

Start-up of motors or reversible machines for pump operation.

Cold and hot start-up of gas turbines.

Benefits

Start-up proceeds without reducing the voltage on the switchgear busbars.

Current circuits are not overloaded during the start.

Unlike an asynchronous start, it gives the synchronous machine a significantly longer service life.

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Electrecatechno

Electrical and automation engineering for power generation and process industries.

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