首页 | 本学科首页   官方微博 | 高级检索  
     

基于定频滞环控制的逆变器死区补偿研究
引用本文:陈伟国,曾江. 基于定频滞环控制的逆变器死区补偿研究[J]. 电机与控制应用, 2023, 50(4): 69-76
作者姓名:陈伟国  曾江
作者单位:华南理工大学 电力学院,广东 广州510641
摘    要:针对逆变器死区带来的控制精度下降、谐波含量增加等问题,提出一种基于定频滞环控制的死区补偿策略。介绍一种对相间电流误差进行控制的定频滞环控制方法,并利用扩张状态观测器对其中的扇区判断方法进行改进。通过开关动作前后的电流路径,分析出死区期间误差会超出滞环宽度上限或下限。实时计算误差超出环宽的幅度,调整实际环宽,使误差恰好符合预期环宽,达到死区补偿的目的。对基于定频滞环控制的逆变器进行仿真,证明了所提策略可以对死区进行精确补偿。

关 键 词:逆变器; 死区补偿; 定频滞环控制; 滞环宽度调节; 扇区判断
收稿时间:2023-01-08
修稿时间:2023-02-03

Research on Dead Time Compensation of Inverter Based on Constant Frequency Hysteresis Control
CHEN Weiguo,ZENG Jiang. Research on Dead Time Compensation of Inverter Based on Constant Frequency Hysteresis Control[J]. Electric Machines & Control Application, 2023, 50(4): 69-76
Authors:CHEN Weiguo  ZENG Jiang
Affiliation:School of Electric Power, South China University of Technology, Guangzhou 510641, China
Abstract:A dead time compensation strategy based on constant frequency hysteresis control is proposed to solve the problems of control accuracy degradation and harmonic content increase caused by inverter dead time. A constant frequency hysteresis control method for phase to phase current error is introduced, and the extended state observer is used to improve the sector judgment method. Through the current path before and after the switch action, it is analyzed that the error during the dead time will exceed the upper or lower limit of the hysteresis width. The magnitude of the error exceeding the loop width is calculated in real-time, and the actual ring width is adjusted to make the error just reach the expected ring width, so as to achieve the purpose of dead time compensation. The simulation of the inverter based on constant frequency hysteresis control verifies that the proposed strategy can accurately compensate the dead time.
Keywords:inverter   dead time compensation   constant frequency hysteresis control   hysteresis width adjustment   sector judgment
点击此处可从《电机与控制应用》浏览原始摘要信息
点击此处可从《电机与控制应用》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号