Research on Speed-up Scheme of Datong-Xi'an High-speed Railway Power Supply System
Research purposes:The construction of the Datong-Xi'an High-speed Railway Line was designed with the speed of 350 km/h,and it will be operated with the speed of 250 km/h.It is proposed to accelerate the operation speed to 300 km/h.To determine the speed-up reconstruction plan,it is necessary to evaluate and verify the traction power supply capacity and equipment status of the existing power supply system.Combined with the growth demand of traction load,the tracking interval of 5 min and 4 min were used to study the voltage level of the traction network and the effective current of the contact system throughout the line.Through the analysis of the distribution of traction power supply facilities,the capacity of traction transformers and other equipment,the reinforcement plan of equipment was determined.The tension of the contact system was determined through pantograph simulation research,which further verified the adaptability of the overhead catenary system basic capacity and components and determined the reconstruction plan.Research conclusions:(1)Through simulation analysis of the traction power supply capacity and equipment of the existing power supply system,the distribution of existing power supply facilities meets the requirements for speed increase.Except the installation capacity of traction transformers in Xi'an North Traction Substation,which meets the requirements,the rest of the traction substations need to be upgraded for capacity expansion.(2)The layout plan distribution equipment of the traction substation remains unchanged,and the current transformers and wires that do not meet the capacity requirements need to be upgraded for capacity expansion.(3)The contact suspension wire type remains unchanged,and the rated tension of the main line is adjusted to 28.5 kN+21 kN,and some parts of the contact network are simultaneously upgraded.(4)The research results can provide reference and guidance for similar projects such as speed increase and quality improvement of high-speed railway traction power supply system.
high speed railwaytraction power supplytraction substationoverhead catenary systemspeed-up
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