CAJ | 학술논문

针对固定步长比较法的跟踪速度和精度不够理想的特点，提出一种新的变步长扰动观测法来跟踪光伏电池的最大功率点。依据光伏电池的 P-U 曲线特性，在最大功率点两侧采用不同的变步长控制策略。在左侧，采用较大的步长选择策略。在右侧，采用较小的步长选择策略。同时给出步长的选择方法。在MATLAB/Simulink 环境下，搭建光伏电池最大功率点模型并进行仿真。仿真结果表明，该算法可以显著提高最大功率的跟踪速度与精度，有效抑制在最大功率点处的振荡现象。
침대고정보장비교법적근종속도화정도불구이상적특점，제출일충신적변보장우동관측법래근종광복전지적최대공솔점。의거광복전지적 P-U 곡선특성，재최대공솔점량측채용불동적변보장공제책략。재좌측，채용교대적보장선택책략。재우측，채용교소적보장선택책략。동시급출보장적선택방법。재MATLAB/Simulink 배경하，탑건광복전지최대공솔점모형병진행방진。방진결과표명，해산법가이현저제고최대공솔적근종속도여정도，유효억제재최대공솔점처적진탕현상。
Aiming at the problems that tracking speed and precision are not ideal in the fixed step size comparison method, a new variable step disturbance observation method is put forward to track the maximum power point of photovoltaic cells. On the basis of P-U curve characteristics of photovoltaic cells, it uses different control strategies on the both sides of the maximum power point. On the left side, it adopts the strategy of large step length, and on the right side, it adopts the strategy of small step length. At the same time step length selection method is given. In the MATLAB/Simulink environment, a model of maximum power point of photovoltaic systems is built. The simulation results show that the proposed algorithm can significantly improve the tracking speed and precision of the maximum power, effectively restrain the oscillation phenomena of the maximum power point.