Electric generator relay protecting device

The embodiment of the invention provides an electric generator relay protecting device, which comprises a water level acquisition unit, a flow rate acquisition unit, a gate data acquisition and control unit, a speed regulator data acquisition and control unit, an excitation data acquisition and control unit, a synchronization control unit and a comprehensive relay protecting unit. According to the embodiment of the invention, judgement is carried out through detecting a water level and a flow rate of a water inlet, according to preset flow rate and a water level operation curve, the operation power of an electric generator is automatically adjusted in real time, and electric generator protection and gate, speed regulator and excitation control are integrated into a whole so as to be comprehensively protected, so that equipment demand of mid-small sized hydropower station project construction is greatly reduced, the risks of a plurality of failure points caused by a plurality of equipment are reduced, meanwhil