水轮发电机定子绝缘缺陷现场修复工艺（On site repair technology of stator insulation fault of Hydrogenerator）水轮发电机定子绝缘缺陷现场修复工艺(On site repair technology of stator insulation fault of Hydrogenerator) Northwest power plant installed 3 * 6300kW, generator rated voltage 6.3kV. The first phase of 2 x 6300kW was put into operation in 1992, and the second phase of the project was installed with 1 x 6300kW in . The 3 units are vertical shaft mixed flow turbine generator sets. The first phase of the project installation and commissioning is very smooth, the second phase of the project found in the installation and commissioning of the generator stator has a major quality defects, after the site repair qualified before commissioning power generation. First, the phenomenon of failure The generator stator in March 26, by the factory car to power plants, in which the frame welded by steel plate, diameter 3400mm, high 1710mm, high silicon steel sheet by 0.5mm thick core laminations of fan-shaped punching pressure, axial length is divided into 14 sections, section between the radial ventilation channel 10mm high 13. A total of 144 stator coils, each of which is 2 sections of 5 * 2mm flat copper bars, is wound and formed, the main lead line and the neutral lead line each have 3, for the double stack winding, the 6 branch, the Y type connection, the insulation class is B class. In May 19th, the stator was installed in the pit. In May 21st, the substation was installed and tested by the power bureau, and the stator transfer test was carried out according to the preventive test procedure for electrical equipment (DL/T596-1996): DC withstand voltage, DC withstand voltage AX-BYCZ (ground) 5000/10000 ...
