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

Weili Li, Yong Li, Ying Su, Purui Wang and Wenmao Liu
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Weili Li: Electric Engineering, Beijing Jiaotong University, Beijing 100044, China
Yong Li: Electric Engineering, Beijing Jiaotong University, Beijing 100044, China
Ying Su: Electric Engineering, Beijing Jiaotong University, Beijing 100044, China
Purui Wang: Electric Engineering, Beijing Jiaotong University, Beijing 100044, China
Wenmao Liu: Electric Engineering, Beijing Jiaotong University, Beijing 100044, China

Energies, 2018, vol. 11, issue 5, 1-15

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.

Keywords: turbine generator; temperature field; main insulation shelling (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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