Differential resonator method for early fault visual detection of generator rotor system
Zhao Dong-cheng · Dianli zidonghua shebei · 2007
Differential resonator method for early fault visual detection of generator rotor system is proposed based on the deep research of its weak fault signal extraction.A detector is designed based on differential function to determine the excitation frequency fe and the detection frequency fd.When the detected signal includes the fd component,system immediately produces resonance to suppress noise,causing the phase figure changed obviously.The early system fault can be visually detected according to the phase figure change.Applications in generator rotor winding inter-turn short-circuit fault and rub-impact fault detections verify its validity.