The Research On The Characteristics Of The Offline Arc Velocity And The Pantograph Control Strategies

In recent years,as China's importance for the electrification of the railway increased,electrified railway system theoretical knowledge increasingly complete.Among them,the electrified railway traction power supply system of catenary wire and pantograph question slide in sliding contact with the current domestic and international issues are very important.Electric Locomotive obtain power by sliding contact with the catenary pantograph to maintain its normal steady operation.Thus,the flow quality of electrified railway safety,stability,it is extremely important indicators for pantograph system.Electrified railway in the high-speed driving,due to various external factors and internal factors,are likely to cause off-line phenomenon,by restricting the flow quality,threaten the process of moving locomotive safety and stability.After several decades of development,and finally in bottlenecks on the occasion,some scholars proposed that the active control technology used in the pantograph,thereby suppressing vibration pantograph,raise pantograph coupling quality.The so-called pantograph active control strategy is mainly composed of four parts,namely: the measurement section,the control section,the actuator portion and a mounting portion,the key part is the control section and the actuator section,the two complement each other.On this basis,scholars have proposed semi-active control technology,compared with active control technology,semi-active control strategies consume less external energy,however,this study found that in high-speed operation,the semi-active control technology,while also It has a certain ability to regulate,but not more precise and active control technology.Firstly,through the extraction of pantograph voltage signal component analysis,indicating the speed factor plays a decisive role in the bow network operation,and analysis showed that with increasing speed,the pantograph voltage quality to deteriorate further,the harmonic components also increasingly complex,no rules to follow,and even the speed increases to a certain extent there will be inter-harmonic components,great harm;then,we bow in order to improve the quality of network voltage,put forward by active control and semi-active control of the implementation of pantograph ways to improve the quality of pantograph coupling suppress arcing,improve voltage quality and forth through simulation experiments were active control and semi-active control of the control effect;and finally,by comparative analysis shows the pantograph active and semi-active control advantages and weaknesses.