中文摘要：

作为电力传输设备,封闭母线接头处的发热温升和散热问题是影响其工作稳定性的重要因素。结合导热、对流、辐射三种热能传递的基本方式建立封闭母线接头的温度场数学模型。然后,针对其难以直接测量内部温度场的现状,采用共轭梯度法对封闭母线接头的热源进行了反演,从而得到其内部温度场,并讨论了待反演参数的初始猜测值及测量误差对反演结果的影响。结果表明：反演结果对初始值有一定的依赖性;在一定的测量误差范围内,共轭梯度法仍能够得到较满意的结果。

英文摘要：

The temperature rise and heat dissipation occurring at the joints of enclosed bus-bar were the essential factors that affect the operating stability of the power transport equipment. The mathematical model for obtaining the temperature fields of simplified bus-bar was established based on the basic heat transfer modes, including the heat conduction, convection and the radiation. For its being difficulty to measure directly, the internal heat source was inversed using conjugate gradient method. After that the temperature field of the joints of enclosed bus-bar was obtained,as well as the influences of the initial guesses value of inverse parameters and the measured errors on the accuracy of inverse solutions. The results show that the accuracy of inverse solutions depends on the initial guess values of the inverse parameters; when the measured temperatures come with some errors,the satisfactory results can still be obtained by adopting this method.