摘要
针对目前经典电流滞环控制方法的缺陷,详细介绍了将不定频滞环和空间电压矢量相结合的控制方法,包括系统的数学建模、控制原理、重点规则和实现过程等。在Matlab/Simulink软件平台上搭建了系统的仿真模型,通过与传统的电流滞环和单极性PWM控制方法相比较,验证了不定频滞环空间电压矢量控制方法可实现单位功率因数运行,且在降低谐波污染、减小开关频率、加快动态响应速度等方面的优越性,从而为PWM整流器控制提供了新的控制方法,此法可提高系统运行效率,并具有实际应用价值。
In view of the common shortcomings of conventional hysteresis controlling method,this paper proposes a new control strategy for three-phase PWM rectifier,which combines variable-frequency hysteresis current control with space-vector control. The system mathematical model,control mechnism,major principles and implementation process are elaborated. On Matlab /Simulink software platform,a simulation model for the system was established,and the comparation with the traditional current hysteresis and unipolar PWM control method has verified that the variable-frequency hysteresis and space-vector control method can realize unit power factor running,reduce the harmonic pollution,lower switching frequency,accelerate dynamic response and so on,providing a new method for PWM rectifier control. This method is effective in improving the system efficiency and valuable in application.
出处
《华东电力》
北大核心
2014年第6期1144-1149,共6页
East China Electric Power
基金
国家自然科学基金项目(61304134)
上海市重点科技攻关计划项目(11510500800)
上海市电站自动化技术重点实验室项目(13DZ2273800)~~
关键词
三相PWM整流器
不定频滞环
空间矢量电流
电流跟踪
three-phase PWM rectifier
variable-frequency hysteresis
space-vector current
current track