【摘要】 针对扰动观察法跟踪光伏电池最大功率点时,存在跟踪速度较慢和功率振荡等问题,在此提出一种新颖的最大功率点跟踪(MPPT)方法。对外界环境进行实时判断,若判断外界环境变化较大,以较短定时时间间隔连续进行变步长跟踪搜索,确保快速达到最大功率点;若判断外界环境变化较小,维持较长定时时间的最优定占空比控制,有效避免了持续扰动引起的功率损失。搭建了以TMS320LF2407A DSP为核心的硬件平台,通过仿真和实验验证了该方法的正确性和有效性。更多还原

【Abstract】 A novel maximum power point tracking(MPPT)method is proposed to solve the problem of the tracking speed and power fluctuation in the P&O method for PV cell.When the environment changes strongly,varied step search is implemented at intervals of the shorter timing to track the maximum power point quickly.On the contrary,the optimal constant duty ratio is utilized for a longer timing to avoid the power loss owing to the continuous perturbation for the P&O method.On the basis of hardware platform in the core of DSP TMS320LF2407A,the simulation and experimental results prove that this method is right and valid.更多还原