analytical method for the analysis of the circulating current of 

 

4 kinds of transposition in the stator of a hydraulic turbine

 

 

ZHOU Deng, YAO Ying ying

 

(Electrical Engineering College, Zhejiang University, Hangzhou 310000, China)

 

 

Abstract: Aiming at time consuming 3D modeling and calculation of stator coils as well as the complexity of magnetic field computation, analytical method and multi section method coupled field circuit were proposed to analyze circulating current and loss of stator strands including 0°/360°/0° transposition, inadequate transposition, void transposition and extended transposition on the basis of meeting the computing accuracy and avoiding the large amount of calculation. The comparison chart of the induced voltage, the circulating current and the loss were presented. The results indicate that 0°/360°/0° transposition gets the worst effect in reducing the circulating current compared to other transpositions. And the calculation results are similar between multi section method coupled field circuit and analytical method. Moreover, multi section method coupled field circuit has advantages in calculation formula, process, amount of calculation and accuracy on the basis of correct simulation of leakage magnetic field.

 

Key words: analytical method; multi section method coupled field circuit; circulating current