垂直布置的母线温度场计算及分析

为ＸＸＸ水力发电厂母线增容改造工程项目所进行的研究。母线在实际运行中由于存在着电阻损耗而发热，这一热量如不能及时散失，将使母线温度升高，甚至超过允许温度，从而影响母线的工作性能。为了保证垂直布置的全连式封闭母线工作的安全怀和可靠性，需对其散热问题进行热分析。针对垂直布置的母线进行了详细分析，建立了垂直布置的母线的传热模型，确定了计算母线壳体温度和导体温度的数值计算方法，并根据所得结果提出了在工程应

THE TEMPERATURE CALCULATION AND ANALYSIS OF THE LONG VERTICAL BUSES

The paper is on the basis of the researching which buses are modified to extend the capacity in XX hydropower plant. Buses produce heat in function because of theirs resistance and it is disadvantageous for buses. In order to improve their reliability and security, it is necessary to put up their thermal analysis before they are in function. In this paper, the heat balance of the vertical bus that is fixed in bus holes is analyzed in detail. and the thermal model is also founded. In the meantime, the temperature of the bus under natural cooling condition is computed by numerical calculation. If the temperature does not meet the requirement, the two schemes of forced ventilation are posed and compared. At last, the ventilating fan is selected on the basis of analysis.