Based On Suzhou Rail Transit Operation And Energy Saving Optimization Control Research

With the rapid construction,operation and continuous increase of traffic density of suzhou rail transit network,the annual electricity consumption increases sharply year by year,making it a large power user in the city.How to minimize the energy consumption of various equipment in the overall planning,construction and operation of urban rail transit,on the basis of meeting the needs of passenger transport,select the reasonable type of equipment and put forward the system energy saving operation mode will have great significance for the energy saving of urban rail transit.Rail transit power supply system provides power for all kinds of equipment and facilities of urban rail transit,such as train traction,power lighting,ventilation and air conditioning,environment and equipment monitoring system(BAS),disaster prevention and alarm system(FAS),signal system,communication system,station ticket selling and checking system and so on.It is a typical power consumer in urban industry.Among them,train traction and ventilation and air conditioning account for a higher proportion of energy consumption,which is the main aspect of power consumption.In the past,there were many studies on ventilation and air-conditioning,such as energy-saving optimization by means of equipment modification and operation mode adjustment.The research results have been more comprehensive,while traction power supply is still in the initial stage of research,and there is much room for exploration.Based on the background of Suzhou Rail Transit,this paper studies the energy-saving optimization control of traction power supply system.The traction power supply system of Suzhou rail transit adopts centralized power supply mode,which is divided into several sections according to the power supply situation.Each section corresponds to a power supply area,and the corresponding power supply section is supplied by different substations.The operation of urban rail transit trains is divided into four working conditions:traction,cruise,inertia and braking.The trains need to consume electric energy in the traction and cruise conditions.It does not consume electric energy in idle operation,but generates electric energy in braking operation.The electric energy generated during braking can be fed back to the catenary or used by other nearby trains.Generally,the stopping time and interval running time of train diagram are not rigid and have certain elastic space.Optimizing the parameters of train diagram is the basic premise to realize energy-saving operation.Aiming at the characteristics of short spacing,high traffic density and frequent start-stop of urban rail transit stations,this paper proposes a regenerative braking energy feedback reuse strategy based on coordinated control of multi-trains in the same direction.The regenerative braking energy generated by braking trains is fed back to accelerating trains in the same direction or opposite direction within the same power supply area.By adjusting the departure interval,the interval running time and the interval running time properly,the regenerative braking energy generated by In order to achieve the goal of minimizing energy consumption of the whole line,a mathematical model of timetable optimization is established.The utilization rate of renewable energy is improved by model optimization.At the same time,the validity of the method is verified by the data generated by the actual operation of Suzhou Rail Transit.After optimization,the electric energy can be saved by about 11.5%.In addition,this paper also proceeds from the reality,from three aspects of planning and design,equipment selection,operation and management,analyzed and studied the causes and improvement measures and methods which have a greater impact on energy saving of rail transit.In order to adapt to the long-term passenger flow forecast and determine the advanced and reasonable service level for passenger transport demand,energy saving should be paid attention to in the overall planning,design and equipment selection of urban rail transit construction.It is of great significance to reserve energy-saving operation mode of equipment for operation stage.At the same time,the energy-saving operation control results of Suzhou rail transit in the design and operation stages are listed.The above research results have a strong reference significance for other urban rail transit construction.