电力系统保护与控制2017，Vol.45Issue(23)：42-48,7.DOI:10.7667/PSPC161905
基于功率预测的新型变步长电导增量法最大功率点跟踪策略
Maximum power point tracking strategy based on power predication for a novel variable step-size incremental conductance algorithm
盛四清 1陈玉良1
作者信息
- 1. 华北电力大学电气与电子工程学院,河北 保定 071003
- 折叠
摘要
Abstract
The output characteristics of photovoltaic cells are strongly nonlinear, and the maximum power point tracking technique can improve the efficiency of photovoltaic systems. Traditional fixed step-size algorithm must take a compromise between the steady-state accuracy and the response speed in selecting step.Variable step-size algorithm has good performance at the same light intensity, while it exists dead zone of maximum power point tracing when the external conditions change drastically. A new variable step-size incremental conductance method based on power prediction is proposed. This method adopts a new step-size adjustment coefficient. It can adjust the step size according to the change of external conditions and solve the contradiction between tracking speed and steady-state precision. When the illumination changes drastically, the algorithm ensures that the judgments before and after the disturbance are carried out on the same power curve to avoid the occurrence of misjudgment. Simulation results show the effectiveness of the proposed algorithm.关键词
最大功率点跟踪/变步长/电导增量法/功率预测/步长调整系数Key words
maximum power point tracking/variable step-size/incremental conductance/power prediction/step adjustment factor引用本文复制引用
盛四清,陈玉良..基于功率预测的新型变步长电导增量法最大功率点跟踪策略[J].电力系统保护与控制,2017,45(23):42-48,7.
