Stability Control Strategy of Multi-locomotive Coupling to Draw Liquid-solid Coupling Load

Abstract

For the longitudinal impulse problem of HXD1C locomotive when it was drawing the oil tank marshalling in the second railway from Turpan to Korla by two locomotives coupling mode, according to the locomotive traction / brake control characteristics and field test, this paper proposed an optimized quasi-constant speed control strategy including unloading point of traction force, unloading ramp rate and speed change frequency. The proposed method can reduce the amplitude and frequency of traction force fluctuation for cutting down the longitudinal impulse because of changing the clearance between vehicle coupler and buffer or the coupler state too frequently when it is drawing the oil tank marshalling, and can keep stable operation of the locomotive, and also gives a reference to the stability control strategy of the multi-locomotive coupling to draw liquid-solid coupling load for the other type locomotives that use the quasi-constant speed control strategy