基于内模及单周控制原理的变流器控制技术分析及讨论

Analysis and exploration on the converter control technology based on internal model and one-cycle control principle

根据内模原理的电力电子变流器及双级有源功率因数校正(PFC)技术的改进措施加以分析和论述。采用提高变流器工作频率的方法可以实现电路装置的小型化,以电力电子变流器作为电力接口的各种新能源发电单元,通过采取一系列针对性电路改进措施和基于集成软件平台的平面集成优化设计方法,以期获得高性价比和高功率密度的低压大电流谐振型开关变流器,达到变流器电路参数优化设计的实践意义和目的。文中分析和讨论了变流器的工作机理、控制方法及其试验分析。

According to the disadvantages of high switching pressure and output voltage of single-phase CCM Boost power factor correction （PFC） converter, this paper presents CCM Boost PFC converter with active floating charge landing. This type of one-cycle control PFC converter has such advantages as simple structure, high control precision, quick response time, and especially, non-sensitivity of its control perforamee to changes of system and power supply parameters. The proposed AC/DC switching converter significantly helps improve the converter efficiency and its power factor value.