发电车负荷的计算方法

Method of calculation on electric generating car load

确定空调列车发电车设计方案的依据是空调列车的计算负荷,即最大负荷,以及负荷性质、供电质量和电能价格等。求得计算负荷的方法有需要系数法、利用系数法和单车负荷法等。而各种方法的可信赖程度又主要取决于各种系数与实际情况的趋近程度。本文对需要系数法及其相应系数的导出,进行了实例说明,依据为京广和京沪干线空调列车的冬、夏试验数据。就目前所占有的资料,只能得到以客车为用电设备组的季节性需要系数,有一定局限性。

The calculated load (i. e. max. load) as well asthe load nature. electric power supply quality and theprice of electric energy of air-conditioned train arethe origins for determining the design scheme of elec-tric generating car in air-conditioned train. Thereare demand factor method. utilization factor methodand single car load method for finding out the cal-culated load. The reliability of each such method ismainly determined by the proximity of such factor toactual condition. In this paper, the demand factor method and thederivation of corresponding factor are illustrated withactual example; these are carried out on the basis ofthe test data from winter and summer tests on Bei-jing-Guangzhou and Beijing-Shanghai main line air-conditioned trains. According to the data now posses-sed, only the seasonal demand factor with passengercar as power consumption equipment set can be ob-tained. so such data have certain limitations.