Study of local heating on by IPB connection box and around metallic parts of large power transformer by 3-D Magnetic field analysis

Hirokazu Hayashida
Transformer Design Department, Japan AE Power Systems Corporation

Abstract

Large power transformer for a power station is generally applied Isolated Phase Bus (IPB) between the transformer and the generator, and IPB connection box is mounted on the low voltage side of the transformer. Because very large current flows through the IPB, there is a concern of local heating on the metallic parts around the IPB due to the influence of the magnetic flux. In this paper, it is reported that 3-D magnetic analysis is performed to grasp the phenomenon visually and numerically by using JMAG and evaluate it.

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