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为使电气化铁道接触网供电的各相负荷尽可能的平衡,在接触网上采用分段换相供电。相间采用空气或绝缘物分割,一般称为“相分段”。电力机车过相分段时需退级、分断主断路器。这不仅影响了行车速度,分散司机精力,且易引起机车和供电设备故障。因此,乘务人员和供电人员迫切希望将现有的断电过分段改为带电过分段,即实现分相自动转换。
In order to balance the load of each phase of electrified railway catenary power supply, the phased commutation power supply is used in the contact network. Separated by air or insulation, commonly referred to as “phase segmentation.” Electric locomotives need to be phased out when the phase section, breaking the main circuit breaker. This not only affects the driving speed, distracted drivers, and easily lead to locomotives and power equipment failure. Therefore, flight attendants and power supply personnel are eager to change over-power from over-current to live over-segmented, that is, to achieve phase-to-phase automatic conversion.