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| Stabilization Control for Metro Traction Converter - Motor System |
| Zhao Leiting,Diao Lijun,Dong Kan,Liu Zhigang |
| Beijing Jiaotong University Beijing 100044 China |
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Abstract Traction converter-motor system is the main component of metro vehicle. Voltage and current oscillation on the DC-link of traction converter is easily stirred by metro catenary voltage fluctuation,by limited configuration of LC filter parameters,and by negative impedance characteristic due to certain traction control scheme. Such DC-link oscillation results in consistent unsettled motor torque output,affecting system stability finally. This paper first comes up with the ?-equivalent circuit and approximated linear model based on rotor-field-orientation traction control scheme,and then the equation dealing with input admittance of traction converter is induced,by which the oscillation mechanism of LC-converter-motor system is analyzed thoroughly. Finally,this paper proposes a novel stabilization controller with the on-line correction of the torque component of stator current,for the adjustment of input converter admittance. The controller is then subjected to simulated and experimental results,for the testimony of its effectiveness.
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Received: 20 September 2012
Published: 11 December 2013
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2013, Vol. 28 
