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Analysis of Generator Rotor Widing Inter-turn Short Circuit Fault Based on Shaft Voltage

Author: WuChun
Tutor: LiYongGang；WangYunFei
School: North China Electric Power University (Hebei)
Course: Electrical Engineering
Keywords: Axis voltage Fault Diagnosis Rotor eccentricity Online monitoring Short-circuit between the rotor turns
CLC: TM311
Type: Master's thesis
Year: 2009
Downloads: 45
Quote: 0
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Abstract


This paper presents a new method for a the shaft voltage turbine generator rotor winding inter turn short-circuit fault monitoring . Due to the presence of the motor or less static eccentric axis voltage always exists in the motor . When the short-circuit between the rotor turns , the effect of unbalanced magnetic pull and rotor thermal bending , moving eccentric are exacerbated , leading to a greater degree of uneven air gap , allowing the shaft to produce a larger shaft voltage . Unipolar effect due to short circuit between the rotor turns and air gap eccentricity axis voltage mechanism is more thorough , detailed analysis , analysis of air-gap flux density axis voltage fault characteristic spectrum . Compiled with Visual C axis voltage line monitoring software , success was achieved shaft voltage line spectrum analysis and alarm . This software can also off-line analysis of shaft voltage , easy operation and analysts to identify new interturn short circuit characteristic spectrum .

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CLC: > Industrial Technology > Electrotechnical > Motor > Generators, large the generator group ( Zonglun,) > Turbine Generator
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