Identification and response strategy for pantograph-catenary contact loss in high-speed railway
Transient disconnection between pantographs and catenaries during train operation on electrified railways,known as pan-tograph-catenary contact loss,can cause issues like over-current,creating safety hazards and consequential disruptions to operational or-der.This paper introduces the main circuit structure and control method of grid-side rectifiers of the prevailing traction electric drive sys-tems for EMU.The analysis investigated the system impacts of pantograph-catenary contact loss,emphasizing the reasons for over-cur-rent occurrences during contact recovery,leading to the establishment of a rapid online identification method and a response strategy.Fol-lowing developing a full-digital real-time simulation model of the electric drive systems for traction,which includes an arc model,accu-racy verification was conducted firstly through waveform comparisons with actual measurements.This model was subsequently used to verify the proposed identification method and response strategy for pantograph-catenary contact loss.
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