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AT供电方式起源较早,是1911年由美国一位名叫W·阿瑟的工程师首先提出来的,于1913年在纽黑文铁路上安装试用,采用的牵引网电压为25赫2×11千伏。由于它的电气计算比较复杂,因而没有得到进一步发展。近二十年来,由于高速交流电气化铁路的兴起,大大促进了AT供电方式的发展,加之电子计算机技术的应用,也为其电气计算提供了必要的手段。目前,已有很多国家大力发展这种供电方式。日本于1966年7月起通过一系列运营试
AT power supply originated earlier, was first proposed by a U.S. engineer named W. Arthur in 1911 and installed on the New Haven Railway in 1913. The traction grid voltage was 25 Hz 2 × 11 KV. Due to its complexity of electrical calculations, it has not been further developed. In the recent two decades, due to the rise of high-speed AC electrified railway, the development of AT power supply mode has been promoted greatly. Besides, the application of electronic computer technology has also provided the necessary means for its electrical calculation. At present, many countries have vigorously developed this power supply. Japan passed a series of operational tests in July 1966