Influence Of Traction Load Of Electrified Railway On Regional Wind Farm

Electrified railway is the main artery of our railway system,while its rapid development also brings some influence to the power grid.Zhengxi high-speed railway,through the area of Datang Sanmenxia wind farm,led to a large area of wind farm off the network phenomenon due to the integrated operation of the electrified railway.At the end of 2015,the installed capacity of wind farms in northern Hebei exceeded 10 million kilowatts,and the newly opened Zhangtang Railway in the vicinity was officially opened on 30 December of the same year.Based on the special science and technology project of the national grid Hebei North Electric Power Research Institute Co.Ltd.,this paper studies the influence of the traction load of the electrified railway on the surrounding power grid,especially the power grid containing the wind farm area,and for the harmonic and negative sequence put forward the wind farm suppression measures.Firstly,the traction load of electrified railway is modeled in this paper,and the grid model,traction power supply system model,HXD2 type electric locomotive model,and equivalent wind farm model are established based on PSCAD/EMTDC software.According to the locomotive conditions required to adjust the locomotive running in the traction network position,electric locomotives can choose a different mode of operation to simulate.Secondly,power quality is tested in the actual traction station,and the test data is compared with the simulation results generated by the model as previously mentioned.The reliability of the model is used to study the accuracy of the electrified railway traction load.Due to the asymmetric operation of traction load,the harmonic and negative sequence currents are generated,and the propagation rules of the harmonics and negative sequence currents along the different paths are studied,and the measured data are used to verify and summarize again.Then,the simulation model is used to simulate the different operating conditions of the locomotive,and the influence of the traction load on the power grid is summarized.In view of the actual situation of the grid and the wind farm which is running in the northern Hebei area,the influence of the electrified railway on the wind farm is evaluated and the forecast of the future railway capacity is analyzed.Finally,the paper puts forward the corresponding measures to solve the influence of the electrified railway load on the wind farm,discusses the governance measures adopted at home and abroad,and chooses the FC filter and the three-phase SVC device to provide suggestions on the internal power quality management of the traction station.In this.paper,taking the specific engineering project as the background,combined with the power grid parameters and the traction load operating parameters of the electrified railway,the influence of the traction load on the surrounding power grid is studied deeply,which provides an important theoretical basis and guidance for the access the power grid in future electrification traction station.