城市轨道供电系统设备检修策略研究

Study on Maintenance Strategies for Power Supply Equipment in Urban Rail Transit

随着城市轨道交通运营时间的延长,运营检修人员的作业时间不断被压缩。如果在运营期间的非高峰时段开展常规的检修作业,就不仅能为运营检修维护提供充足的时间,而且能提升运营检修的质量和效率。在非高峰运营时段对供电系统进行检修作业,若系统发生N-2工况,则需要快速给出相应的决策方案以及恢复供电操作。在此背景下,根据开闭所或牵混所整流机组的2种检修作业模式,给出了系统发生N-2工况的5种情形,提出了切除三级负荷与减少发车对数的运维决策数学模型。以某分散式供电系统实际线路为例,分别对5种情形进行仿真模拟,得出了相应情形下的恢复供电操作方案。在一座整流机组检修,非相邻整流机组故障的情形下,求解出了在非高峰运营时段满足供电系统正常运行的发车间隔。

As the operating hours of urban rail transit continue to extend,the working hours of operational and maintenance personnel are progressively constrained.Conducting routine maintenance operations during non-peak hours of operation not only provides ample time for operational maintenance and upkeep but also enhances quality and efficiency of such activities.If a system under maintenance during non-peak operational hours encounters an N-2 operating condition,then prompt formulation of corresponding decision-making strategies and power restoration procedures are of necessity.In view of this,this paper delineates five scenarios wherein N-2 operating conditions arise,based on two maintenance modes for rectifier units in switching or mixing stations.A mathematical model for operational decision-making is proposed,encompassing removal of tertiary loads and reduction of departing train quantities.Taking an actual route within a decentralized power supply system as an illustrative case,simulations are carried out for all of the five scenarios,yielding power restoration approaches tailored to each case.Furthermore,in scenarios involving the maintenance of a rectifier unit and non-adjacent rectifier unit malfunctions,a solution is derived for achieving normal power supply system operation during non-peak operational hours,including the determination of optimal departure intervals.