Gas turbine generator turn-to-turn protection device capable of automatically generating longitudinal zero-sequence voltage

The utility model provides a gas turbine generator turn-to-turn protection device capable of automatically generating longitudinal zero sequence voltage, two ends of the protection device are respectively connected with a generator neutral point transformer and a low voltage side of a main transformer, and the protection device comprises a divider resistor, a voltage calculator and a voltage transformer. The two sides of the voltage calculator are connected with the divider resistor and the output end of the voltage transformer respectively, the input end of the divider resistor is connected with the generator, and the input end of the voltage transformer is connected with the low-voltage side of the main transformer. The protection device carries out self-produced longitudinal zero-sequence voltage calculation by replacing machine-end zero-sequence voltage with a main transformer low-voltage side zero-sequence voltage sampling value, can judge a contact at the position of a generator outlet circuit breaker,