为了减少电气化铁路对其沿线的通信系统造成的干扰，电牵引供电系统可以采用自耦变压器供电方式。
Electrification railway will interfere with the communication system along the line. To decrease this kind of interference, the autotransformer power-supply mode can be adopted.
电铁机车沿铁路移动用电，其产生的谐波对电网的危害比其它谐波源更为广泛、严重，因此对电铁牵引供电系统谐波的正确检测具有重要的实际意义。
The harm of harmonic generated by locomotive of electrified railway, which uses electricity along the railway, is more widely and seriously than other harmonic souse to the power system.
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