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.
阐述了AT供电用自耦变压器的运行方式，分析了AT用自耦变压器的性能、特点及能达到低阻抗的原因及措施。
The operation ways of auto-transformer for AT power supply are expounded. Its performance and characteristics are analyzed. It is introduced that how to get to the lower impedance.
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