准PR调节H6结构并网逆变器的非线性行为  

Nonlinear behaviour of grid-connected inverters with quasi-PR regulated H6 structure

作　　者：陶慧[1,2] 艾朋伟 贺国帅 王坤 TAO Hui;AI Pengwei;HE Guoshuai;WANG Kun(School of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo 454003,China;Henan International Joint Laboratory of Direct Drive and Control of Intelligent Equipment,Jiaozuo 454003,China)

机构地区：[1]河南理工大学电气工程与自动化学院,河南焦作454003 [2]河南省智能装备直驱技术与控制国际联合实验室,河南焦作454003

出　　处：《电机与控制学报》2025年第1期100-110,共11页Electric Machines and Control

基　　金：国家自然科学基金(U1804143)。

摘　　要：准比例谐振(QPR)控制能有效抑制网侧电压波动带来的干扰,研究该控制下H6结构并网逆变器的动力学行为,并对系统出现的混沌现象进行控制。首先根据系统的工作原理,利用频闪映射法建立系统离散迭代模型。然后结合分岔图、折叠图、时域波形以及频谱图等分析系统的非线性行为,发现系统存在着Hopf分岔、倍周期分岔以及边界碰撞分岔等丰富的动力学行为,并给出了各参数的稳定工作范围。之后引入二阶带阻滤波器对进入混沌状态的系统进行控制,结果表明二阶带阻滤波器具有很好的控制效果,并提高了输入电压E、滤波电感L的稳定工作域。最后通过半实物仿真平台进行了实验验证,研究所得结论可为准PR调节下H6结构并网逆变器的实际工程设计及调试提供理论依据。Quasi-proportional resonance(QPR)control can effectively suppress the disturbances caused by voltage fluctuations on the network side.The dynamical behaviour of a grid-connected inverter with H6 structure under this control was investigated and the chaotic phenomena occurring in the system were controlled.Firstly,the discrete iterative model of the system was established according to the working principle of the system using the stroboscopic mapping method.Then the non-linear behaviour of the system was analysed by combining bifurcation diagrams,folding diagrams,time-domain waveforms and spectrum.It is found that there are rich dynamical behaviours such as Hopf bifurcation,doubly periodic bifurcation and boundary collision bifurcation,and the stable operating range of each parameter is given.Afterwards,a second-order band-reject filter was introduced to control the system entering the chaotic state.The results show that the second-order band-reject filter has a better control effect and significantly improves the stable working range of the input voltage E and the filter inductor L.Finally,experimental verification was carried out via a semi-physical simulation platform.The conclusions obtained from the study can provide a theoretical basis for the practical engineering design and commissioning of grid-connected inverters with H6 structure under QPR regulation.

关 键 词：并网逆变器 非线性行为 混沌控制 准比例谐振 频闪映射法 分岔图 

分 类 号：TM464[电气工程—电器]