PFC直流电压控制性能提升的非线性控制策略  

Nonlinear Control Strategy for Improving DC Voltage Control Performance of PFC System

作　　者：尹爱辉 任昂 武晓文 侯建峰 范玉林 YIN Aihui;REN Ang;WU Xiaowen;HOU Jianfeng;FAN Yulin(Jinan Power Company,State Grid Shandong Electric Power Company,Jinan 250002,Shangdong,China)

机构地区：[1]国网山东省电力公司济南供电公司,山东济南250002

出　　处：《电气传动》2022年第7期23-28,共6页Electric Drive

基　　金：国家电网基金项目(SGSDJN00FZJS1700429)。

摘　　要：在功率因数校正器(PFC)中使用快速电压控制时,直流侧纹波会引起并网电流谐波。针对这个问题,提出了一种在功率因数校正器中可减少快速电压闭环谐波含量的新型直流电压非线性PI控制策略。新控制策略基于Takagi-Sugeno型非线性模糊模型结合PI调节器实现,其优势在于既可以在系统稳态工作期间保持低谐波含量,又可在从负载动态中快速恢复。利用3 kW单相PFC样机测试平台开展了新方案和传统线性PI控制方案的对比实验,测试结果表明,新型非线性PI控制器在稍微提高算法复杂度的基础上即可大量降低电流谐波,并具有较快的动态响应。When fast voltage control is used in a power factor corrector(PFC),ripples on the DC side can cause grid current harmonics.To solve this problem,a novel DC voltage nonlinear PI control strategy was proposed,which could reduce the harmonic content of fast voltage closed-loop in power factor corrector.Based on the Takagi-Sugeno nonlinear Fuzzy model combined with the PI regulator,the new control strategy was built.The advantage of the new control strategy is that it can not only maintain low harmonic content during the steady-state operation of the system,but also recover quickly from the load transient.The comparative experiments were carried out between the new scheme and the traditional linear PI control scheme by the 3 kW single-phase PFC test platform.The test results show that the new nonlinear PI controller can greatly reduce the current harmonics and have the fast dynamic response on the basis of slightly increasing the algorithm complexity.

关 键 词：功率因数校正器 模糊模型 非线性控制 直流电压控制 

分 类 号：TM46[电气工程—电器]