华南理工大学学报(自然科学版) ›› 2018, Vol. 46 ›› Issue (5): 109-116.doi: 10.3969/j.issn.1000-565X.2018.05.015

• 能源与动力工程 • 上一篇    下一篇

基于死区消除与补偿的 T 型三电平逆变器控制策略

胡毕华1 康龙云1, 2† 程建材1 王则沣1 吴璟玥1   

  1. 1. 华南理工大学 电力学院∥广东省绿色能源技术重点实验室,广东 广州 510640; 2. 东莞市德尔能新能源股份有限公司,广东 东莞 523772
  • 收稿日期:2017-08-17 修回日期:2018-01-16 出版日期:2018-05-25 发布日期:2018-04-03
  • 通信作者: 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
  • 作者简介: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
  • 基金资助:
     广东省重大科技专项( 2014B010125002) ;东莞市引进创新科研团队计划项目( 2014607119)

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) 

摘要: 为了避免三电平逆变器的上下桥臂直通,开关切换过程中会引入死区. 死区会提 高逆变器的输出电流谐波,降低逆变器的输出电压和电流. 文中分析了死区在开关管换流 过程中的作用,并在此基础上提出一种死区消除与补偿相结合的方法来消除其对逆变器 的不利影响. 当相电流足够大时,可以根据电流的方向输入不同的驱动信号,达到在没有 死区的情况下防止开关管短路的目的. 当相电流接近零点时,由于电流纹波的影响,死区 消除方法并不适用,只能通过引入死区来提高逆变器的稳定性,然后通过死区补偿来消除 其不利影响. 实验结果证明,文中方法可以有效地解决死区问题. 

关键词: T 型三电平逆变器, 死区消除, 死区补偿, 电流极性 

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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