Investigation of turbine generator rotor winding inter-turn short circuit fault based on harmonic detection

2008 ◽  
Author(s):  
Wu Yucai ◽  
Li Yonggang ◽  
Wan Shuting ◽  
Li Heming
Keyword(s):  
Short Circuit ◽  
Harmonic Detection ◽  
Turbine Generator ◽  
Generator Rotor ◽  
Rotor Winding ◽  
Short Circuit Fault

Impact of Rotor Inter-Turn Short-Circuit on Generator Rotor Force

2011 ◽  
Vol 143-144 ◽  
pp. 125-131 ◽  
Author(s):  
Yong Gang Li ◽  
Guo Wei Zhou ◽  
Yu Ca Wu ◽  
He Ming Li
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Force ◽  
Short Circuit ◽  
Total Force ◽  
Distribution Law ◽  
Generator Rotor ◽  
Finite Element Software ◽  
Full Force ◽  
Rotor Winding ◽  
Short Circuit Fault

This paper analyzes the calculation method of unbalanced electromagnetic force by rotor winding inter-turn short-circuit fault, analytical calculating method neglects saturation, cogging and other factors, so the calculation accuracy is not high, in order to accurately calculate the magnetic field and the unbalanced electromagnetic force, this paper propose to analyze generator magnetic field by a finite element software Ansys, the obtained magnetic field data are further used to analyze the distributed electromagnetic force and the total force that generator rotor suffered, electromagnetic force distribution law of different slots, different levels of inter-turn short-circuit are got, which provide a basis for further studying the full force on generator rotor.

Study on Unbalanced Electromagnetic Force of Turbine-Generator Inter Turn Short Circuit and its Relevant Fault

2013 ◽  
Vol 427-429 ◽  
pp. 230-234
Author(s):  
Wen Jing Zhang ◽  
Yong Gang Li ◽  
Yu Ca Wu
Keyword(s):  
Finite Element ◽  
Fault Diagnosis ◽  
Electromagnetic Force ◽  
Short Circuit ◽  
Turbine Generator ◽  
Element Simulation ◽  
Rotor Winding ◽  
Relationship Of ◽  
Short Circuit Fault ◽  
The Relationship

Inter turn short circuit fault is very common for turbine-generator, which will produce unbalanced electromagnetic force (UEMF) together with its relevant fault, namely dynamic eccentric, on the rotor. After complete finite element simulation by ANSYS, The relationship of rotor winding short positions and short degrees with UEMF were studied. And then, only the dynamic eccentric fault occurs, the relations of dynamic eccentric angles and dynamic eccentric degrees with UEMF were discussed as well. Whats more, by comprehensive consideration of the two faults, the characteristic of the force and its change law were researched. This paper provides a viable path to study the vibration law and fault diagnosis of turbine-generator in multi-source stress.

The Research and Identify on Hydro Generator Rotor Windings Short-Circuit Fault

2014 ◽  
Vol 1033-1034 ◽  
pp. 1343-1349
Author(s):  
Yong Gang Li ◽  
Jie Jia ◽  
Liu Wan
Keyword(s):  
Theoretical Calculations ◽  
Circuit Simulation ◽  
Short Circuit ◽  
Hydroelectric Power Plant ◽  
Stable Operation ◽  
Hydroelectric Power ◽  
Load Curve ◽  
Turbine Generator ◽  
Generator Rotor ◽  
Rotor Winding

Hydro-generator unit is the most important energy conversion device in the hydropower, which is directly related to the safety and reliability and stable operation of the hydroelectric power plant. When the turbine generator rotor winding inter-turn short circuit occurs, the proposed method using load curve electromagnetic characteristics analysis, the use of before and after the failure to find the relative change in the excitation current failure rate as the identification method, the criterion may reflect the severity of the failure, perform theoretical calculations, and thus the inter-turbine generator rotor windings short circuit simulation, consistent with the conclusions of the theoretical analysis.

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