大容量发电机出线封闭母线的作用与降温降耗措施探讨

随着大容量发电机的普遍应用，发电机出线的大电流封闭母线也被广泛采用。但从设计、制造和运行都较少考虑母线本身的发热和损耗。因此，采用封闭母线后虽具有磁屏蔽、防止发电机出口短路、提高母线的动稳定能力和可以防止发生母线绝缘子污闪事故等很多优点，但也存在母线损耗增大、发电机出线箱在正常运行中温度较高的问题。章提出了在封闭母线外壳轴线方向焊上相同材质的铝排作为散热片来降温、降耗的建议。这一建议的实际效果还有待进一步论证与实践检验。

Discussion on Role of Enclosed Bus and Measures of Reduced Temperature and Loss for Outgoing Line of Large Generator

Along with the universal application of large generator, the enclosed bus with big current for generator outgoing line is adopted extensively. But the heat and the losses of bus are less considered comparatively from design, production and operation. There are many advantages to adopt enclosed bus, such as magnetic shield, preventing short circuit of generator outlet, raising bus dynamic stability and preventing flashover fault occurred on bus insulator, but also there are some problems, such as increasing bus losses and higher temperature in outlet case of generator in normal operation. The paper puts forward the suggestion, the aluminum row is welded with i-dentical material quality in axis direction of enclosed bus shell as radiating fin to reduce the temperature and losses. The actual effect of this suggestion still remains to expound and prove in practical inspection further.