TBB-800-2EY3型汽轮发电机定子绕组及其端部支撑结构的改造

由于 TBB-800-2EY3型汽轮发电机定子端部绕组支撑结构等的设计存在严重弊病，导致运行中数次发生线棒磨损、漏水故障。按原结构修复投运后再次发生类似故障。为根除上述弊病，采用当代汽轮发电机设计、制造新技术，改造800 MW大容量汽轮发电机定子端部绕组的支撑结构、定子绕组、定子压圈及屏蔽结构。发电机改造后，定子端部绕组的振动值、定子绕组的附加铜损耗和基本铜损耗以及压圈的损耗与温升均大幅度降低，发电机的效率和运行可靠性均有提高。

Reformation of Stator Winding and its End Support Structure of TBB-800-2EY3 Turbo-Generator

Serious drawbacks exist in the design of stator winding support structure of TBB-800-2EY3 turbo-generator, resulting in several occurrences of faults, such as stator bar insulation wear-out and cooling water leakage during operation. After repaired in its original structure and resumed operation, similar faults occurred in the machine again. In order to eradicate the drawbacks mentioned above, this new techniques of design and manufacture for modern turbo-generators are introduced, which rebuilds the whole stator winding end support structure including stator winding, stator end plates and its screen structure. After the modification, the vibration magnitude of stator end winding, the additional copper loss, the total dc I ² r loss and end plates loss were considerably diminished. The temperature rise of these parts was appreciably reduced also. The operational efficiency and reliability were improved as well.