Generator rotor interturn short-circuit state detection device

A technology of generator rotor and inter-turn short circuit, which is applied in the direction of motor generator testing, measuring device, measuring electricity, etc. The effect of online detection

Inactive Publication Date: 2008-01-09
XIAN YOUBAI TEST & CONTROL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, under the normal operation state of the generator, a certain research result at home and abroad still cannot provide informatio

Method used

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  • Generator rotor interturn short-circuit state detection device

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[0017] The present invention will be further described in detail below in conjunction with the drawings.

[0018] 1 and 2, the present invention includes a stator 1 and a rotor 3 and a rotor winding 5 arranged in the rotor 3. An air gap 2 formed between the stator 1 and the rotor 3 is in the air gap 2 between the stator 1 and the rotor 3. A sensor 4 is provided. The sensor 4 is a differential detection coil that collects the rotor slot leakage magnetic potential in the air gap magnetic field. Its specific position is at any position in the axial direction of the rotor 3, and the radial distance from the surface of the rotor 3 is 1 / the length of the air barrier. 4-3 / 4, the signal output terminal of the sensor 4 is connected to the input terminal of the signal preprocessor 6, the output terminal of the signal preprocessor 6 is connected to the input terminal of the Dsp digital processor 7, and the Dsp digital processor 7 is also connected to the keyboard 10. The power supply 11 is c...

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Abstract

The invention is a detector of inter-turn short-circuit state of generator rotor windings, comprising: stator, rotor and rotor windings arranged in the rotor, and air gap between stator and rotor, where a sensor is arranged in the air gap between stator and rotor, the signal output end of the sensor is connected with input end of signal preprocessor, the output end of the signal preprocessor is connected with input end of a DSP, the DSP is connected with keyboard and power supply, output end of the DSP is equipped with communication interface and LCD. And it differentiates rotary magnetic field in air gap of operating synchronous generator and analyzes differential waveform of the DSP to be able to determine whether there is inter-turn short-circuit failure of rotor windings and the positions of the rotor windings, thus implementing on-line detection for inter-turn short-circuit state of rotor windings.

Description

technical field [0001] The invention relates to a detection device for a short-circuit state of a generator, in particular to a detection device for a short-circuit state between turns of a rotor winding of a generator. Background technique [0002] Turn-to-turn short-circuit of generator rotor winding is a common electrical fault. A slight turn-to-turn short-circuit will not have much impact on the operation of the generator. If the fault continues to develop, it will endanger the safety of the generator and the power system. The condition monitoring of the rotor winding of the generator set aims to discover hidden faults and prevent the occurrence of vicious accidents. Therefore, it is of great practical significance to study the mechanism and state diagnosis method of rotor winding inter-turn short circuit fault. [0003] At present, for the judgment of the short-circuit fault between the turns of the generator rotor, the common means at home and abroad are carried out u...

Claims

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Application Information

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IPC IPC(8): G01R31/34G01R31/06
Inventor 王荣海陆剑王道远
Owner XIAN YOUBAI TEST & CONTROL TECH
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