About Generator stator cooling air temperature
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6 FAQs about [Generator stator cooling air temperature]
How to calculate stator temperature field in generator normal operating?
Based on calculated additional copper losses, turbulent movement in the ventilation ducts and boundary conditions of the model, stator temperature field in the generator normal operating is calculated via finite volume method (FVM). The obtained results are compared with the measurements to verify the accuracy of the calculation method.
What temperature should a generator be cooled to?
The peak temperature of a generator should typically be maintained below 130 ℃. Depending on overall heat removal and installation requirement, air or hydrogen is used for the cooling medium. Often, air is preferred for its availability and safety to handle compared to hydrogen.
What is the stator ventilation system of a 150 MW generator?
The stator ventilation system of the 150 MW generator is designed for air intake on both sides and radial ventilation ducts with unequal tooth spacing in the axial direction, and is symmetrical along the center of the shaft, as shown in Fig. 2. The air pressurized by the fan comes out of the cooler, and then is divided into three paths.
What causes aging in a generator?
Insulation aging in large generators is one of critical fault sources for machines. About 1/3 of generator faults are caused by critical temperature under stator winding insulation faults, especially stator ground-wall insulation shelling fault.
How does a stator radial ventilation duct affect temperature distribution?
The stator radial ventilation duct is the main path for the stator winding to dissipate heat and directly affects the stator winding and core temperature distribution. The heat dissipation capability of the stator core and yoke back is also the main factor affecting the stator winding and core temperature .
How to solve high thermal load of generator windings?
Therefore, a good ventilation system with air as a cooling medium is also the main way to solve the high thermal load of the generator windings. To improve the cooling effect of the stator winding, radial ventilating ducts with different widths are adopted in the axial direction of the stator core.
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