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内燃机车供电设备同客车电气设备之间要求有一个品质优良的接口。这种接口设备目前无论是国内还是国际上均未有详尽的介绍。本文将近年来在这方面的研究成果作一介绍，以填补这方面的空白。通过大量的试验并采集参数分析，从中得出列车供电电源的品质因数，为此，必须分析非线性负荷的影响，以便评估列车供电设备的品质并找到产生干扰的原因。这对于处理一些重复的及多种相关的数据是很重要的。本文还讲述了对客车电气设备及机车供电设备所进行的试验及计算结果。
Diesel locomotive power supply equipment with the bus between the electrical equipment requires a good quality interface. At present, this kind of interface device has not been introduced either domestically or internationally. This article introduces the research results in this area in recent years to fill the gaps in this area. Through a large number of experiments and the acquisition of parameter analysis, the quality factor of train power supply can be obtained. Therefore, the influence of nonlinear load must be analyzed in order to evaluate the quality of train power supply equipment and find out the reasons for the interference. This is important for dealing with repetitive and related data. The article also tells about the test and calculation results of bus electric equipment and locomotive power supply equipment.