光伏发电最大功率点跟踪控制Boost变换器研究

Photovoltaic Maximum Power Point Tracking Control Boost Converter

针对光伏并网发电转换效率低等问题,分析了利用Boost变换器实现最大功率点跟踪的理论依据。综合运用恒定电压控制法和扰动观测法,得出光伏系统改进MPPT控制算法。将该算法用单片机实现,并结合PI调节,实现系统在最大功率点的稳定输出。给出了适用于MPPT控制的具有保护功能的Boost变换器设计方案。仿真分析以及实际电路调试的结果表明,改进MPPT算法控制下的光伏阵列的输出电压,符合光伏阵列理论上最大功率点的范围,稳态性能良好。

Aiming at solving the relevant prob-lem on low efficiency of power conversion,a novel MPPT method is detailedly analyzed. Integrating the constant voltage tracking method and the per-turbation and observation method, an improved method is given. The algorithm is applied with sin-gle - chip computer, and combined with PI regula-tion, stable output is realized on the maximum power point, Design of the MPPT - Oriented Boost converter with the function of tripping is intro-duced. The simulation and the practical experi-ment verify that, controlled by rithm, the output voltage of the with the expected output range, state performance is good, . the novel algo-PV array accords and the steady -