It is significant in design of traction power supply systems and evaluation of relative power quality problems to build a proper electric load model for the electric multiple units (EMU).

动车组电气负荷建模对牵引供电系统的设计以及电能质量相关问题的评估具有重要意义。

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Electrified railway's traction load is usually the big consumer for the electric power system, so electrified railway's traction load is the main power quality pollution source.

电气化铁道牵引负荷是大宗的工业用电部门，因此它是电力系统重要的电能污染源。

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The sympathetic inrush may occur in the system transformer when no-load electric locomotive or traction transformer is switched, so the protection may be affected.

通过分析发现电力机车空载启动和牵引变空载合闸都会在系统变压器中造成和应涌流。

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