济南地铁3号线牵引系统高速断路器控制电路优化

Control Circuit Optimization for High-speed Circuit Breaker in Traction System of Jinan Metro Line 3

[目的]济南地铁3号线运营初期,在操作高速断路器闭合时,多次偶发性报出高速断路器闭合故障。为了提高列车运行可靠性,需对该线路牵引系统高速断路器控制电路进行优化。[方法]根据3号线列车高速断路器闭合故障发生时的相关指令及器件状态,结合高速断路器控制逻辑原理对高速断路器偶发性无法闭合故障原因进行分析,并提出优化措施。[结果及结论]高速断路器闭合故障原因为:高速断路器在闭合控制过程中,其线圈两端产生的感应电动势使得高速断路器合闸功率不足,导致高速断路器偶发性无法闭合。优化措施为:通过在高速断路器线圈两端接入续流二极管,抑制高速断路器线圈产生的感应电动势。采取上述优化措施后,未再次发生因感应电动势导致的高速断路器无法闭合故障,有效提升了列车运行的可靠性。

[Objective]In the early operation stage of Jinan Metro Line 3,multiple sporadic high-speed circuit breaker closing failures are reported.To improve the reliability of train operation,it is necessary to optimize the high-speed circuit breaker control circuit in the traction system.[Method]According to the relevant closing command and the component status when a closure failure of the high-speed circuit breaker on Line 3 train occurs,and in accordance with the control logic principle of the high-speed breaker,the causes of the occasional closure failure are analyzed and the optimization measures are put forward.[Result&Conclusion]The causes of the occasional closure failure are that in the process of closure control of high-speed circuit breaker,the induced electromotive force generated at both ends of the high-speed circuit breaker coil makes the closing power insufficient,resulting in the failure closure of the breaker.The improvement measure is to connect freewheel diodes at both ends of the high-speed circuit coil to suppress the induced electromotive force generated by the above coil.With the above improvement measure,the closure failure of the high-speed circuit breaker caused by induced electromotive force never occurs again,and the reliability of train operation is effectively improved.