Other

North China Electric Power University

Yuling He

Xiaolong Wang

Minghao Qiu

Wen Zhang

Yong Li

Yifan Bai

Chenkai Sun

Xinghua Yuan

Mingxing Xu

Mengya Jiang

A generator fault detection method based on the characteristics of air gap magnetic flux density includes the following steps: S: installing detection devices on a generator and building a test platform; S: obtaining an air gap magnetic flux density signal through the detection devices; S: transforming a time domain signal of the magnetic flux density into a frequency domain signal by using a fast Fourier transform; S: judging if the generator has an air gap eccentricity or a stator inter-turn short circuit fault through the comparison of time domain and frequency domain; S: obtaining a value of air gap magnetic flux density by calculation, selecting and then comparing a root mean square value of magnetic flux density under different working conditions with the root mean square value of magnetic flux density under normal condition to determine a fault degree.

Generator fault detection method based on the characteristics of air gap magnetic flux density

A detection system and method for rotor dynamic turn-to-turn short circuit fault of synchronous generator are disclosed. The system includes a motor, a synchronous generator, a current transformer, an acquisition card, an infrared temperature sensor, a temperature acquisition instrument and a control terminal. The rotor winding dynamic turn-to-turn short circuit fault of synchronous generator is detected and located by measuring the double judgment standards of the temperature signal of rotor winding and the three-phase current signal of stator winding. The method is easy to operate and has high sensitivity. The detection and location process of the fault is efficient and reliable. The dynamic turn-to-turn short circuit fault can be detected in the early stage of the formation of rotor static turn-to-turn short circuit, so as to reduce the loss of power plant fault shutdown and better meet the needs of practical application.

Detection system and method for rotor dynamic turn-to-turn short circuit fault of synchronous generator

Growing community of inventors

Baoding, China

Yuling He