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

Abstract:

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.

• Periodical: Applied Mechanics and Materials (Volumes 427-429)
• Pages: 230-234
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.427-429.230
• Online since: September 2013
• Authors: Wen Jing Zhang*, Yong Gang Li, Yu Ca Wu
• Keywords: Dynamic Eccentric, Finite Element Method (FEM), Inter Turn Short Circuit, Unbalanced Electromagnetic Force (UEMF)

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DOI: 10.1109/tie.2009.2029577