Study on Maintenance Strategies for Power Supply Equipment in Urban Rail Transit
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.
urban railpower supply systemN-2 working conditionoperation,maintenance and repair strategydeparture interval
NETL
NSTL
万方数据
