基于级联H桥的光伏组件设计与研究

Design and Research of Photovoltaic Module Based on Cascade H-bridge

设计了级联H桥光伏组件结构,包含光伏电池模块、具有惯性能量环节的Boost/Buck模块、链式H桥模块。介绍了最大功率点跟踪(MPPT)控制算法和链式级联H桥控制算法,给出全链12H桥和缺链11H桥的控制角度表,并分析输出电压变化对有功无功的影响。在EMTP仿真软件中搭建12H桥级联模型,验证H桥级联输出的可能性,并证明其谐波含量小、电能质量高。最后设计制作了链式级联光伏板,表明可以平稳地输出交流电,并与传统光伏组件的日发电量进行对比,证明其发电量多、追踪辐照度性能良好。

The module structure of cascade H -bridge is designed, including the photovoltaic cell module, the Boost/ Buck module with inertial energy link and H-bridge cascade module.Maximum power point tracking(MPPT) control algorithm and chain cascade H-bridge control algorithm are introduced, the control angle table of full chain 12H-bridge and short chain 11 H-bridge is given , and the influence of output voltage variation on active power and reactive power is analyzed.The 12H-bridge cascade model is built in EMTP simulation software to verify the feasibility of the Hbridge cascade output, and prove that its harmonic content is small and the power quality is high. Finally, a chain cascade photovoltaic panel is designed, which shows that it can output alternating current smoothly, and compare with the solar power generation of the traditional photovoltaic modules, the power generation and tracking irradiance are proved to be good.