STARTING DEVICE FOR SINGLE-SHAFT GAS-TURBINE SET Russian patent published in 2003 - IPC

FIELD: power engineering. SUBSTANCE: invention can be used for starting power generating single-shaft gas-turbine set in which turbine generator as used as accelerating motor, said turbogenerator being mechanically coupled with shaft of gas turbine. Generator operates as synchronous motor when starting gas turbine. Proposed starting device contains starting control device, frequency converter connected through starting device transformer and switch with power station local demand buses and through starting device switch with terminals of stator winding of turbogenerator, automatic field regulator and exciter with circuit of rotor of turbogenerator and with rotor sliprings which are connected through sliding contact with fixed contact brushes, and rotor of turbogenerator is mechanically connected with rotor of gas turbine. Initial field rectifier is introduced additionally into device, output of said rectifier being connected through initial field contactor with rotor circuit of turbogenerator through sliprings, and field winding of exciter is connected through additionally introduced power amplifier an control channel selector with output of starting control device with output of automatic field regulator. Supply circuit of initial field rectifier is connected to local demand buses through transformer and switch. Invention makes it possible to dispense with power brush-contact gear which requires regular maintenance. EFFECT: increased service life and improved reliability of device, cut down mounting cost and provision of compact design of generator. 1 dwg