摘要
滞环控制技术是一种使用广泛的跟踪控制技术,具有响应速度快、不需要调制环节、结构简单且自带限流功能等优点。滞环控制在逆变器和整流器的应用上比较多,但是在矩阵变换器上的研究并不多。针对矩阵变换器的三位式的滞环控制器与变环宽控制器的研究更是罕有报道。考虑到大部分矩阵变换器的控制方法都比较复杂,存在算法计算量较大等问题,滞环控制器在矩阵变换器的控制上具有重要的研究意义与实用价值。聚焦矩阵变换器的电流滞环控制技术,首先采用二位式滞环比较器设计滞环控制器以控制矩阵变换器的输出电流。然后考虑到矩阵变换器的输入是三相,设计了更加适合用于矩阵变换器的三位式滞环控制器,增加了一种电压选择并提高了控制的灵活性与准确性。最后针对二位式和三位式滞环控制器中环宽固定带来的问题,利用模糊控制器对滞环宽度进行在线调节,从而改善控制性能。在Matlab/Simulink仿真环境中对所设计的控制进行仿真,仿真结果验证了控制方法的正确性和有效性。
Hysteresis control technology is a widely used tracking control technology, which has the advantages of fast response speed, no need for modulation stage, simple structure and inherent current limit capability, etc. Hysteresis control has been widely used in inverters and rectifiers, but rarely in matrix converters. The research related to the three-position hysteresis controller and variable band width control is also scarcely reported. Taking into account most of the matrix converter control methods are complex and the computational burden is heavy, the hysteresis control of matrix converter is of great research significance and application potential. This paper mainly focuses on the hysteresis controller of a three-phase direct matrix converter. Firstly, the hysteresis controller based on two-position comparators is designed to control the output currents of the matrix converter. Then the three-position hysteresis controller which is more suitable for the matrix converter is designed considering that the input has three phases. In this way, the choice of voltage selection is increased to three and the control flexibility and accuracy are enhanced. Finally, to address the issues caused by the fixed hysteresis band width in two-and three-position hysteresis controllers, a fuzzy controller is adopted to adjust the band width online, thus improving the control performance. The simulation work is carried out in Matlab/Simulink and simulation results verify the feasibility and effectiveness of the proposed controllers.
作者
张建伟
王佳宇
ZHANG Jianwei;WANG Jiayu(Inner Mongolia Key Lab of Electrical Power Conversion,Transmission and Control,Hohhot 010080;Electric Power College,Inner Mongolia University of Technology,Hohhot 010080)
出处
《电气工程学报》
CSCD
2021年第1期48-54,共7页
Journal of Electrical Engineering
基金
内蒙古自然科学基金(2020BS05027)
内蒙古工业大学科学研究(ZZ201910,BS201901)
内蒙古自治区人才开发基金(DC2000000338)资助项目。
