基于比例谐振的单相PFC电流控制策略  

Electrical Current Control Strategy of Single-Phase PFC Based on Proportion Plus Resonant Regulator

作　　者：谢积锦[1] 张圆圆[1] 

机构地区：[1]钦州学院广西高校临海机械装备设计制造及控制重点实验室培育基地,广西钦州535000

出　　处：《钦州学院学报》2015年第5期49-54,共6页Journal of Qinzhou University

基　　金：钦州学院校级科研项目:太阳能H6拓扑及其频率自适应比例谐振控制的研究(2014XJKY-22B);广西高校科学研究项目:忆阻混沌系统建模;实现及同步技术研究(2013YB256);广西壮族自治区教育厅项目:海洋船舶航向的智能控制研究(2013YB261);广西高校临海机械装备设计制造及控制重点实验室培育基地主任课题基金资助:港口桥式起重机驱动控制系统的研究(GXLH2014ZD-02)

摘　　要：传统单相PFC以PI调节器为控制核心,采用双闭环控制策略,电流内环PI控制器在跟踪正弦参考信号时存在稳态误差,使PFC输入电流产生畸变,影响了功率因数的提高,也增加了谐波含量。针对该问题,建立了系统的状态空间模型,推导了系统的小信号传递函数,通过Bode图指出传统控制策略的不足,提出新颖的控制结构,将比例谐振控制器引入电流环路,提高电流环增益,有效解决了电流畸变问题。仿真和实验进一步验证了控制策略的可行性和优越性。The traditional single-phase PFC regards PI regulator as the core and adopts double closed loop control strategy. As a result,the steady-state errors exist in tracking the sinusoidal reference signal with the current inner PI controller, bringing PFC current distortion,affecting the improvement of power factor and harmonic. To solve these problems, the state-space model of the system should be established firstly for deriving the system＇s small-signal transfer function and pointing out the deficiencies of traditional control strategies through bode diagram. Then a novel control structure is proposed, which introduces the proportion plus resonant regulator into current loop and improves the control gain for effective solving the problem of electrical current distor- tion. Finally, Simulations and experiments are conducted to validate the feasibility and superiority of the proposed control strategy.

关 键 词：谐振控制 功率因数校正 谐波 电流环 

分 类 号：TM464[电气工程—电器]