Detection-coil-based turn-to-turn short-circuit diagnosis method for rotor winding of hydraulic generator

The invention discloses a detection-coil-based turn-to-turn short-circuit diagnosis method for a rotor winding of a hydraulic generator. A radial U-shaped detection coil is installed a stretch-across stator iron core segment inside a generator, an output port of the U-shaped detection coil is connected in parallel with a high-resistance resistor, and a voltage signal from the output terminal of the detection coil is processed by using a on-line data acquisition and real-time analysis system; during the operation process of the generator, the voltage signal of the outlet of the U-shaped detection coil is collected in real time by using the on-line data acquisition system, real-time data processing is carried out on the collected voltage signal, offsets of induction voltages on the detection coil that are caused when same parts of different magnetic poles scan the U-shaped detection coil are compared, and when the voltage difference exceeds a set threshold, a U-shaped detection coil turn-to-turn short-circuit f