关键词: 单机运行, 不匹配问题, 轨道电路, 缓吸电路

Abstract: Track circuit is an important device to reflect the train occupancy status and transmit the train control information. During the retrofitting of the normal-speed railways, there has been the problem of mismatch between track circuits due to the high running speed of the single-locomotive train, the delay in equipment response, and the delay in relay action. This paper proposes the method of slow-operating circuit using capacitors and resistors or equipment replacement to solve this mismatch problem. The proposed method has been applied during the retrofitting of the track circuits of Rongjiawan Station of Beijing-Guangzhou Railway, and has been proven to effectively solve the problem of mismatch between track circuits and such ensuing problems of the interlocking system as fail to unlock normally, forget to unlock, and report track unoccupied in the presence of train.

Key words: single-locomotive train operation, mismatch problem, track circuit, slow-operating circuit