Detection method of generator air-gap static-state eccentric fault orientation and fault degree

A detection method and technology for the degree of failure, applied in the detection field, can solve problems such as difficulty in maintaining and repairing generators, and achieve the effect of facilitating maintenance and repair

Active Publication Date: 2015-10-07
深能合和电力(河源)有限公司
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Problems solved by technology

However, for air gap static eccentric faults, the location of the fault and the degree of eccentricity cannot be simply obtained from the vibration characteristics of the stator a

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  • Detection method of generator air-gap static-state eccentric fault orientation and fault degree
  • Detection method of generator air-gap static-state eccentric fault orientation and fault degree
  • Detection method of generator air-gap static-state eccentric fault orientation and fault degree

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[0028] In order to describe the specific operation process of the detection method of the present invention more accurately and clearly, the applicant explained the principle, implementation process and calculation method of the detection method of the present invention in conjunction with the accompanying drawings. The specific implementation process disclosed below is only illustrative, and does not constitute a particular limitation to the present invention.

[0029] refer to figure 2 , the detection method of the present invention is in traditional generator set structure (generator 1 on the bearing block 6 obtains DC current from exciter through the exciter 7 coaxial with it), in the stator iron core of generator 1 vertical and horizontal Four Hall voltage sensors 2, 3, 4, 5 connected to the induction coil are installed in the direction, and the collected signal is transmitted to the lower computer 9 through the signal transmission line. The lower computer transmits the...

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Abstract

The invention discloses a detection method of a generator air-gap static-state eccentric fault orientation. The method comprises the following steps of 1) through a Hall voltage sensor, collecting voltage signals of induction coils on four vertical distribution measuring points of a stator circumference and outputting to an acquisition instrument; 2) comparing the four voltage signals and determining a static eccentric fault orientation and a fault degree. By using a technical scheme disclosed in the invention, the air-gap static eccentric fault in the generator can be simply, rapidly and reliably detected so that a disadvantage of a traditional diagnosis technology is overcome and maintenance and repairing of the generator are convenient, wherein a rotor vibration characteristic is a main part in the traditional diagnosis technology.

Description

technical field [0001] The invention relates to a method for measuring the orientation and degree of a static eccentric fault in an internal air gap of a generator, and belongs to the technical field of detection. Background technique [0002] Most generators have stator-rotor air-gap eccentricity to varying degrees. When the eccentricity exceeds a certain limit, it is considered that the generator has air-gap eccentricity faults. Such faults will lead to deterioration of the working state of the generator bearings and aggravate the Vibration causes stator core deformation, winding wear and insulation damage. [0003] Air-gap eccentricity can be divided into three types: static eccentricity, dynamic eccentricity, and dynamic-static mixed eccentricity. Among them, the static eccentricity of the air gap means that the center of the generator stator does not coincide with the rotation center of the rotor, but the center of the rotor coincides with the rotation center, which is ...

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Application Information

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IPC IPC(8): G01R31/34
Inventor 何玉灵邓玮琪刘会兰唐贵基
Owner 深能合和电力(河源)有限公司
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