Effect of vehicle speed on pantograph arc discharge for high speed EMU
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Due to extremely high vehicle speed of high speed EMU,arc discharge is generated by vibrations between pantograph and contact line.Consequently,electromagnetic harassment comes out.The electromagnetic harassment must be studied in order to propose a basis which further evaluate the affects of such harassment on safety of high speed EMU.In this paper,firstly,relationship among vehicle speed versus pantograph off-line probability,pantograph contact force and contact line dynamic uplift is built up via pantograph system vibration equation.Then pantograph arc discharge model is established,and simulations are carried out.Finally,analysis under different speed conditions are presented,in view of trends frequency and magnitude of electromagnetic harassment caused by pantograph arc discharge.