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ANALYSIS OF
GENERATOR STATOR AND ROTOR VIBRATION CHARACTERISTIC UNDER INFLUENCE
OF
OPERATION CONDITION
WAN Shuting1 TANG Guiji1
LI Yonggang2
(1. College of Mechanical
Engineering, North China Electric Power University, Baoding 071003;
2. College of Electrical Engineering,
North China Electric Power University, Baoding 071003 )
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Abstract: Stator
and rotor vibration characteristics of nonsalient synchronous generator
for different operating conditions are analyzed. Firstly, the
electromagnetism characteristics and armature reaction characteristics
are calculated for different operating conditions, the frequency
characteristics of pulsating electric magnetic force acting on the
stator and imbalance electric magnetic force acting on the rotor are
analyzed when the generator works normally. Then the changing
characteristics, stator radial second frequency vibration and rotor
radial fundamental frequency vibration due to the generator active power
when the excitation current is constant, can be gotten. And the changing
characteristics, due to the excitation current when the generator active
power is constant, can also be gotten. Finally, the stator and rotor
vibration of a type SDF-9 generator is measured in the laboratory to
verify the theoretical analysis presented above. On the other hand, the
conclusion can be drawn, which is the generator operation condition must
be considered when generator fault is analyzed and diagnosed based on
vibration characteristics, otherwise the diagnosis result will be
incredulous.
Key words: Generator
Operation condition Rotor Stator Radial vibration
CLC No: TM31
河北省教育厅科学指导计划项目(Z2004455)和华北电力大学博士学位教师科研基金资助项目.
Received
20051114, received in revised form 20060404 |