Journal of South China University of Technology (Natural Science Edition) ›› 2018, Vol. 46 ›› Issue (5): 109-116.doi: 10.3969/j.issn.1000-565X.2018.05.015

• Power & Electrical Engineering • Previous Articles     Next Articles

Control Strategy of T-Type Three-Level Inverter Based on Integrated Dead-Time Elimination and Compensation
 

 HU Bihua1 KANG Longyun1， 2 CHENG Jiancai1 WANG Zefeng1 WU Jingyue1   

  1.  1． School of Electric Power∥Guangdong Key Laboratory of Clean Energy Technology，South China University of Technology， Guangzhou 510640，Guangdong，China; 2． Dongguan DＲN New Energy Co． ，Ltd． ，Dongguan 523772，Guangdong，China
  • Received:2017-08-17 Revised:2018-01-16 Online:2018-05-25 Published:2018-04-03
  • Contact: 康龙云( 1961-) ，男，教授，博士生导师，主要从事电力电子技术在新能源、电动汽车驱动中的应用研究 E-mail:lykang@scut.edu.cn
  • About author:胡毕华( 1987-) ，男，博士生，主要从事电力电子变换器及电力电子技术在新能源系统中的应用研究
  • Supported by:
     Supported by the Major Science and Technology Project of Guangdong Province( 2014B010125002) 

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Abstract:  In Ttype converters， to avoid the power switches of the same leg to conduct simultaneously during altering the power switches， the deadtime has to be inserted into the switching sequence． However， the inserted deadtime increases the current THD and reduces the output voltage and current． In this paper，an approach which integrates deadtime elimination and compensation is proposed to remove the adverse effect of deadtime based on the function of the deadtime． When the phase current is much larger than the phase current ripple，the deadtime elimination is applied to avoid short circuit without dead time． When the phase current is near zero-crossing point， the deadtime elimination is inapplicable because of the disturbance of current ripples，and the deadtime must be used to improve the stability of inverter． Therefore， the deadtime compensation is used to remove the adverse effect of deadtime． At last， the experimental results demonstrate that the proposed approach is an effective solution to the problems caused by deadtime

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