Generator rotor winding state detection device and method

Abstract

The invention discloses a generator rotor winding state detection device and method, which belong to the field of single-end nondestructive detection of large generator rotor windings. Wherein, the sequential circuit in the device generates full-cycle pulses, and the high-voltage full-cycle pulse matching generator couples the full-cycle pulses generated by the sequential circuit into corresponding transient bidirectional rotating magnetic field pulses, and the transient bidirectional rotating magnetic field pulses pass through impedance-matched connections The wire is transmitted to both ends of the generator rotor winding and the large shaft. The transient two-way rotating magnetic field pulse generates a resonance effect with each large coil in the rotor. The pulse signal coupling feedback acquisition circuit couples all the waveforms reflected back by the generator rotor into The magnetic field waveform is transmitted to the data acquisition system through the operational amplifier; the central processing unit transmits the digital information flow to the host computer. The invention can non-destructively measure the health status of each large coil of a large generator 1 or multiple pole-pair number rotors under the condition of single-end connection measurement.

Description

technical field [0001] The invention relates to a generator rotor winding state detection device and method, belonging to the field of single-end nondestructive detection of large generator windings. Background technique [0002] Existing domestic and foreign large-scale generators, such as large-scale hydraulic and thermal power generators, large-scale nuclear power generators, the rotor needs to be overhauled regularly, and the main content of the overhaul is the internal winding. It is regular. If the fault occurs between the two inspections, the normal operation of the generator cannot be guaranteed, which will greatly affect the production. At present, the primary parameter detection is generally used for the detection of the rotor winding state of large generators at home and abroad, and the secondary parameters are only the AC impedance voltage divider method and the RSO traveling wave method. The generator is detected, and the change of the rotor of the generator is...

AI Technical Summary

Problems solved by technology

However, the existing methods are relatively rough for the detection accuracy of the winding, and can only have a rough judgment on the rotor. The detection of the details of the winding cannot be achieved by existing instruments.

If each large coil is inspected in detail, and there are probes touching the windings, there are hidden dangers caused by various factors to the windings. The value of the rotor of a large generator can easily be tens of millions or even hundreds of millions, so use the probes to touch the windings for detailed inspection. Checking this method is unscientific and does not conform to operating procedures

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