Abstract：The development of high-speed and heavy-haul railways is restricted to a certain extent due to the existence of neutral sections in AC electrified railways. For this reason, many ground auto-passing neutral section schemes have been put forward recently. With simple structure and low cost, the ground auto-passing neutral section devices based on electronic switches are widely applied. However, for the long neutral sections in the heavy-haul railway, long operation time of electronic switches will produce large losses, and an extra cooling device is needed, which reduces the system reliability. This paper proposes a ground auto-passing neutral section device based on the combination switch for the heavy-haul railway. The combination structure of thyristors and high-voltage contactors is adopted. It helps to make the train pass the neutral section with power supply while greatly reducing the overall loss of switches. The combination switch adopts natural cooling to meet the heat dissipation requirements, and no additional heat dissipation device is needed, which enhances the system reliability. The working principle and the characteristics of the proposed ground auto-passing neutral section device and the combination switch are analyzed in detail. The switch loss is quantitatively calculated and compared. The feasibility and the effectiveness of the combination switch are verified by the experimental results of the ground auto-passing neutral section device at the Nanliang traction substation of Shenshuo railway.
张智, 郑琼林, 张智博, 李凯, 郝瑞祥, 游小杰. 一种基于复合开关的交流电气化铁路地面自动过分相装置[J]. 电工技术学报, 2021, 36(23): 4948-4958.
Zhang Zhi, Zheng Trillion Q, Zhang Zhibo, Li Kai, Hao Ruixiang, You Xiaojie. A Ground Auto-Passing Neutral Section Device Based on Combination Switches for AC Electrified Railway. Transactions of China Electrotechnical Society, 2021, 36(23): 4948-4958.
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2021, Vol. 36 
