【摘要】 对光伏电池板的数学模型及其输出功率与占空比的函数关系进行分析,提出了一种两阶段变步长最大功率点跟踪策略。利用Matlab/Simulink仿真软件建立了基于状态方程的光伏系统仿真模型。通过仿真对比分析了扰动观测法、模糊控制策略、变步长控制策略和两阶段变步长控制策略,仿真结果表明两阶段变步长有良好的快速性和稳定性。最后搭建硬件实验平台,实验结果验证了所提控制策略的正确性。更多还原

【Abstract】 Through analysis photovoltaic mathematic model and photovoltaic output power and duty-ratio function relationship,a novel two stage variable step-size maximum power point tracking control strategy is proposed. The simulation model of photovoltaic system based on state equation is built up using Matlab/Simulink. By simulation model,perturb and observation,fuzzy control,common variable step-size,two stage variable step-size are compared,and simulation results indicate two stage variable step-size has quick respond and good stability. Finally,hardware experiment is set up,and the validity of the proposed method is verified by experimental results.更多还原