DING Li，FANG You-tong，JIANG Yi

（College of Electrical Engineering，Zhejiang University，Hangzhou 310027，China）

Abstract：Aiming at the coordination of high speed railway traction motor，the effect of system synchronization of train workingperformance as well as the advantages and disadvantages of different control strategies was analyzed. Electronic virtual line-shafting was chosen for it couldmaintain coordination for most operating conditions. Combined with traditional electronic virtual line-shafting（EVLS） theory and the working situation of traction motors，the traditional EVLS controlling model was optimized and a model which contains four motors was built in Matlab. The model was used to analysis the system performance under load disturbance and imbalance situation.

Thecritical condition of the system coordination was analyzed too. The results indicate that using electronic line- shafting technique incontrolling train traction motors has the advantages of high coordination，fast response has a good application prospect.

Key words：high speed trains traction motors；virtual line-shafting control；modeling and simulation in Matlab