级联H桥光伏逆变器倒置去耦MPPT控制设计  

Design of Inverted Decoupling MPPT Control for Cascaded H-bridge Photovoltaic Inverter

作　　者：冯海全 王鹏[1] 姜齐荣[2] 祁琪 FENG Hai-quan;WANG Peng;JIANG Qi-rong;QI Qi(State Grid Beijing Electric Power Company,Beijing 100051,China;不详)

机构地区：[1]国网北京市电力公司,北京100051 [2]清华大学电机工程与应用电子技术系,北京100083 [3]华北电力大学,北京102206

出　　处：《电力电子技术》2023年第1期79-82,共4页Power Electronics

基　　金：国家自然科学基金(U1866601)。

摘　　要：级联H桥多电平逆变器可以实现光伏阵列在非均匀照射下,各个光伏组件的输出电压单独被控制并实现最大功率点跟踪(MPPT)。为进一步深入研究,此处提出了一种级联H桥光伏逆变器的倒置去耦MPPT控制方案,首先使用具有占空比前馈补偿的比例积分(PI)电流控制器实现单位功率因数,同时借助直流电压控制器实现每个光伏组件的MPPT,并在此基础上提出一种双输入双输出系统的倒置去耦环路增益设计方法,从而有效地将两个H桥环路的相互影响降到最低,最终借助仿真和样机实验的手段对该方案进行了验证。实验结果表明该级联H桥光伏逆变器系统可以在实现单位功率因数的前提下,实现每个光伏组件的MPPT,并且两个H桥环路相互不影响。Cascaded H-bridge multilevel inverter can realize that the output voltage of each photovoltaic module can be controlled separately and the maximum power point tracking(MPPT) can be realized under the non-uniform illumination of the photovoltaic array.In order to further study,an inverted decoupling MPPT control scheme for cascaded H-bridge photovoltaic inverter is proposed.Firstly,a proportional integral(PI) current controller with duty cycle feedforward compensation is used to realize the unit power factor,and the MPPT of each photovoltaic module is realized with the help of DC voltage controller.On this basis,an inverted decoupling loop gain design method for dual input and dual output system is proposed,thus,the interaction between the two H-bridge loops is effectively minimized.Finally,the scheme is verified by means of simulation and prototype experiment.The experimental results show that the cascaded H-bridge photovoltaic inverter system can achieve the MPPT of each photovoltaic module on the premise of achieving the unit power factor,and the two H-bridge loops do not affect each other.

关 键 词：逆变器 倒置去耦 最大功率点跟踪 单位功率因数 

分 类 号：TM464[电气工程—电器]