电力牵引传动系统的三电平直接转矩控制算法的半实物实验研究

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Abstract A direct torque control (DTC) scheme of traction induction motor based on PI controller and space vector pulse width modulation (SVPWM) in 60° coordinate frame is adopted for traction system supplied by three-level diode neutral point clamped(NPC) inverter in high speed electrical multiple units (EMU). Firstly, in order to obtain a perfect torque performance, a modified U-I integration stator flux observer is presented, and the torque and stator flux control schemes based on PI controller are shown. Secondly, SVPWM in 60° coordinate frame is designed in detail, which can reduce calculation times effectively compared with traditional SVPWM. On basis of this, to balance the DC-link capacitors’ voltages, duty ratio times of redundancy small vectors are allocated by regulating neutral point control factor. Finally, validity and feasibility of the three-level direct torque control scheme based on PI controller and SVPWM in 60° coordinate frame are verified by Matlab/Simulink software simulation and Hardware-in-loop experiment of traction experimental prototype for high speed EMU based on TMS320F2812 and dSPACE.

Key words： Three-level neutral point voltage control SVPWM direct torque control 60° coordinate frame

Received: 03 October 2010 Published: 19 March 2014

PACS:	TM921.5
	TM922

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	Articles by authors
	Song Wensheng
	Feng Xiaoyun
	Hou Liming
	Ge Xinglai

Cite this article:

Song Wensheng,Feng Xiaoyun,Hou Liming等. Hardware-in-Loop Research of Three-Level Direct Torque Control Scheme for Electric Traction Drive System[J]. Transactions of China Electrotechnical Society, 2012, 27(2): 165-172.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2012/V27/I2/165

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