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矿山电机车牵引网络电气设计,一般按平均电压降进行计算,以最大电压降进行校验。按照过去的一些规程规定:牵引网络的平均电压降不应超过牵引变电所直流母线额定电压的15%;最大瞬时电压降不应超过牵引变电所直流母线额定电压的35%,即使在特殊困难的条件下,也不得大于40%。现在看来,计算牵引网络电压水平时,以牵引变电所直流母线的额定电压为基准不够妥当。因为,矿山企业交流供配电系统的电压允许在额定值的±5%的范围内波动,采用硅整流器供电的牵引变电所直流母线上的电压也是变化的;特别是在某些矿山企业,为了减小接触线截面或增大供电距离,采取提高牵引变电所
Mining electric locomotive traction network electrical design, generally calculated according to the average voltage drop, the maximum voltage drop for verification. According to some regulations in the past, the average voltage drop of the traction network should not exceed 15% of the rated DC bus voltage of the traction substation; the maximum instantaneous voltage drop should not exceed 35% of the rated DC bus voltage of the traction substation, Under difficult conditions, no more than 40%. It now appears that the calculation of the traction network voltage level to the traction substation DC bus rated voltage as a benchmark is not properly enough. Because the voltage of AC distribution system in mining enterprises is allowed to fluctuate within ± 5% of the rated value, the voltage on the DC bus of the traction substation powered by silicon rectifier also varies. Especially in some mining enterprises, In order to reduce the contact line cross-section or increase the power supply distance, take to improve the traction substation