Calculation of Stator Temperature Field in Water Cooled Synchronous Condenser

FU-CHUN SUN, SHAN-HUA SUN, JING-MO YANG, LI-YING ZHANG, JING-BO YAN, XU ZHANG

Abstract


When the Synchronous condenser adjusts the reactive power of the grid, it will generate a lot of internal losses. Most of these losses will eventually be converted into heat, which will increase the temperature of each part of the motor, which will hinder the safe operation of the Synchronous condenser. At present, the hollow strands in the stator windings of the water-cooled motor have a structure in which the upper and lower sections are equal. In order to reduce the loss of the inner winding of the Synchronous condenser, this paper proposes a new type of winding structure, that is, the structure of the upper section of the hollow strand is larger than the lower section. Taking a 300Mvar large-scale Synchronous condenser as an example, a two-dimensional electromagnetic field finite element simulation model of stator bars under two structures is established, and the resistance increase coefficient of each strand is calculated. Based on this, a large-scale Synchronous condenser is established. a three-dimensional mathematical model of the stator temperature field, The results show that when the hollow strands adopt different structures with upper and lower sections, the temperature rise at the highest point around the hollow strands is reduced.

Keywords


Synchronous condenser, Waterway block, Electromagnetic field, Temperature field, Structural optimization.Text


DOI
10.12783/dtetr/ecae2018/27735

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