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Energies 2018, 11(5), 1101; https://doi.org/10.3390/en11051101

Research on Stator Main Insulation Temperature Field of Air-Cooled Turbo-Generator after Main Insulation Shelling

1
,
1,2
,
1,* , 1
and
1
1
Electric Engineering, Beijing Jiaotong University, Beijing 100044, China
2
Beijing BEIZHONG Steam Turbine Generator Co., Ltd., Beijing 100040, China
*
Author to whom correspondence should be addressed.
Received: 16 February 2018 / Revised: 23 March 2018 / Accepted: 20 April 2018 / Published: 30 April 2018
(This article belongs to the Section Electrical Power and Energy System)
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Abstract

The stator main insulation is the key component of turbo-generator, which is related to the thermal aging of turbo-generator. It is vital to accurately judge the generator aging by calculating the temperature distribution under main insulation normal operation and fault operation. In this paper, taking a 150 MW air-cooled turbo-generator as an example, the temperature field of the main insulation was studied after the stator main insulation shelling. Based on the finite element method, the stator temperature field after the main insulation shelling was calculated. The main insulation position of maximum temperature drop and the temperature distribution of the stator main insulation along the circumference and the axial direction were analyzed. At the same time, with the shelling gap of main insulation increases, the temperature distribution between shelling gap δ = 0.5 mm and δ = 1.0 mm was compared. The results can provide a theory for fault monitoring and diagnostics of the large-scale turbine generator. View Full-Text
Keywords: turbine generator; temperature field; main insulation shelling turbine generator; temperature field; main insulation shelling
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Li, W.; Li, Y.; Su, Y.; Wang, P.; Liu, W. Research on Stator Main Insulation Temperature Field of Air-Cooled Turbo-Generator after Main Insulation Shelling. Energies 2018, 11, 1101.

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