Method and device for locating short-circuit fault between turns of generator rotor

Abstract

The invention provides a method and device for locating a short-circuit fault between turns of a generator rotor, and relates to the technical field of generator fault detection. respectively injecting a continuous low-voltage pulse; receiving the inner-ring reflection pulse and the outer-ring reflection pulse fed back by the generator rotor winding; generating a response difference waveform according to the inner-ring reflection pulse and the outer-ring reflection pulse; Find the characteristic waveform matching the response difference waveform in the characteristic waveform database; obtain the fault location information corresponding to the characteristic waveform recorded in the characteristic waveform database, and determine the generator according to the fault location information Turn-to-turn short-circuit fault location of the rotor. The invention can solve the problems in the prior art that the detection sensitivity of the generator rotor inter-turn short circuit fault is not high, and the fault location of the generator rotor inter-turn short circuit cannot be located.

Description

technical field [0001] The invention relates to the technical field of generator fault detection, in particular to a method and device for locating a short-circuit fault between turns of a generator rotor. Background technique [0002] At present, with the rapid development of the power industry and the substantial increase in power consumption, people have put forward higher requirements for the reliability of generators. However, the rotor of the generator may have defects in the manufacturing process and insulating materials, and the rotor of the generator is affected by working environment factors such as mechanical stress, temperature, and oil pollution during operation. In recent years, more and more rotor turns have occurred Short circuit fault. Rotor turn-to-turn short circuit faults are more harmful to the safe operation of the generator. For example, it is easy to cause abnormal vibration of the rotor or the vibration amplitude exceeds the standard; in addition, ...

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Problems solved by technology

[0004] The embodiment of the present invention provides a method and device for locating the inter-turn short-circuit fault of the generator rotor, so as to solve the problem that the detection sensitivity of the generator rotor inter-turn short-circuit fault in the prior art is not high, and the inter-turn short-circuit of the generator rotor cannot be detected. The problem of locating the fault location

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