Method for calculating hot-spot temperature of axial double-hole copper bar rotor coil of generator

Abstract

According to the method for calculating the hot spot temperature of the axial double-hole copper bar rotor coil of the generator, the calculation process is modularly designed according to functions,the whole calculation process is divided into an input data module, a wind path iterative calculation module and a loss and temperature rise calculation module, and the invention has the advantages that the function modules are clear, and calculation programs are easy to use and upgrade; for temperature rise calculation of the double-hole copper bar structure, the pertinence of the invention is high, and the calculation precision is high. Meanwhile, outlet surface temperature rise calculation of radial air hole surface heat dissipation and axial air hole surface heat dissipation is considered,and the method is suitable for temperature rise design of an existing two-pole 800MW-level to 1260MW-level generator and can be used for developing generators adopting axial double-hole copper bar rotor coils in more capacity ranges; and a new rotor hot spot temperature calculation method which is higher in application degree and capable of guaranteeing the precision in product optimization and improvement can be met, so that the calculation requirement of an axial double-hole copper bar rotor generator is met.

Description

technical field [0001] The invention relates to a method for calculating the hot spot temperature of the axial double-hole copper row rotor coil of a generator, which can be used in the calculation and research of the hot spot temperature of the generator axial double-hole copper row rotor coil and the development research of generator products, and belongs to the electromagnetic design technology of generators field. Background technique [0002] The hot spot temperature of the generator rotor coil is one of the main design data of the generator rotor coil. The accuracy of the design value not only affects the determination of the main dimensions of the generator rotor, but more importantly affects the reliability of operation and the life of the generator. , the accurate calculation of rotor coil hot spot temperature has become an important link in the design process of generator products. [0003] In the prior art, there is no special calculation method for double-hole c...

AI Technical Summary

Problems solved by technology

Because the structure of the axial double-hole copper bar is inconsistent with this structure, it is not completely applicable in practice

First of all, the air volume in the ventilation hole cannot be accurately calculated, because the air path structure of the two is different

Secondly, the copper loss of the rotor coil at the air hole cannot be calculated

It is no longer possible to calculate the heat dissipation coefficient at the air vent

Therefore, it is impossible to accurately calculate the hot spot temperature rise of the rotor coil

Moreover, when using TGS3248 for calculation, various assumptions must be made, which is cumbersome to use.

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