Method and arrangement for protecting turbine generators...

Details Method and arrangement for protecting turbine generators... Method and arrangement for protecting turbine generators...

H - Electricity

02

J

322/0.5

H02J 3/24 (2006.01) H02H 7/06 (2006.01)

Patent

CA 1284176

Abstract of the disclosure: This invention relates to a method by means of which a turbine generator can be protected against sub- synchronous frequencies occurring in an electric network which is connected to the turbine generator and which in- corporates capacitors. The method is based on de-equal- izing the subsynchronous natural frequencies of the three phases, so as to weaken the coherence of the frequencies. This is achieved by incorporating in each of two of the phases a respective inductance L of mutually different size and by changing the capacitance equivalently with a series capacitance C such as to fulfill the condition 1/LC = .omega.?, where .omega.o is the network frequency.

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