Study On Design Of Railway Traction Station Power Supply Project

Railways are an important mode of transportation for people's daily travel and play a key role in improving the development of the regional economy.Withthepopularization and rapid development of electrified railways,railway traction stations are increasingly demanding the reliability and safety of external power supply and power supply lines.This paper is mainly aimed at the design and research of the external power supply project of the railway traction station.The research content is theproduction,architectural design and transmission line design within the wall of the switchyard station area where the railway traction station is powered.According to the characteristics of electric railway operation,load characteristics and power consumption characteristics,the "General Design of 110(66)~750kV Intelligent Substation for National Transmission and Transformation Engineering of State Grid Corporation"(2014 Edition)500-D-3(220)and 220-D-2program design.The railway traction station belongs to the category of primary load power supply.In order to enhance the reliability and safety of the power supply,the two railway lines are powered by the two single-circuit lines,and the automatic power supply switching device is installed in the substation to ensure the railway traction station.Safe and stable operation.The site is located about 30 km northwest of Xing'an League Horqin Right Wing Zhongqi,about 4km away from Meng Enchuang Ligai lead mine.According to the site survey,the terrain of the site is undulating,the type of geomorphology is aeolian landform,the landform type is hilly,sand dune,etc.,and the ground elevation is316.48~322.00 m.The wiring mode of the power distribution unit in the station is 220 kV double busbar wiring,tank circuit breaker,supporting medium-sized double-row arrangement of tube mother;66kV double busbar wiring,tank circuit breaker,supporting medium-sized single-row arrangement of tube,intelligent substation,automatic system adopting open type Hierarchical distributed network structure,designed on an unattended basis.The switch station automation system,communication and other secondary systems are designed according to the regulations and specifications.The paper also focuses on the relay protection action and action mode of the 220 kV standby power automatic switching device.The transmission line path selection was compared,and the basic structure,the iron tower form and the grounding line model were checked for stability.The design and related experiments of each link ensure the feasibility and practicability of the design of the paper.