摘要
建立了二极管钳位型三电平PWM整流器的数学模型,首先对其电流环节采用PI调节器进行控制,分析了控制系统中带宽及解耦效果随开关频率的变化。针对大功率传动系统中,功率器件开关频率的降低对PWM环节造成的影响,将复矢量调节器应用于大功率三电平PWM整流器中,该调节器充分考虑了低开关频率因素,改善了常规PI调节器控制带宽小、动态解耦效果差等问题。最终基于Matlab仿真及DSP实验平台验证了在低开关频率下三电平PWM整流器控制系统中复矢量调节器应用的合理性。
The mathematical model of the diode-clamped three-level PWM rectifier was firstly established.The current of the three-level rectifier was controlled by PI regulator and the bandwidth and decoupling of three-level rectifier was analyzed as the reducing of the switching frequency. The PWM inertial characteristics at low switching frequency were further studied. The complex vector regulator was applied in the control system high-power PWM rectifier which can improve the performance of the control system in bandwith and decoupling. Finally,modulation and experiment results show that the complex current regulator can improve the performance of the system at low switching frequency.
出处
《电气传动》
北大核心
2013年第6期64-67,共4页
Electric Drive
基金
国家自然科学基金项目(51077124)
江苏省"青蓝工程"资助项目
江苏省2012年度普通高校研究生科研创新计划(CXZZ12_0930)
关键词
三电平PWM整流器
低开关频率
复矢量电流调节器
three-level PWM rectifier
low switching frequency
complex vector current regulator
