最大功率點跟蹤能量損耗研究

摘要：光伏并網發電系統中，最大功率點跟蹤對于提高光伏系統的效率至關重要。本文將能量損耗的觀點引入到最大功率點跟蹤的分析中，詳細分析了擾動觀察法的振蕩、跟蹤過程中誤判的能量損耗。提出了一種改進的擾動觀察法，經實驗驗證新方法能夠很好地解決振蕩、跟蹤精度和跟蹤速度問題。 敘詞：擾動觀察法 振蕩 誤判 能量損耗 Abstract：In a grid-connected photovoltaic power system, it is vital to have the maximum power point tracking to improve the efficiency of photovoltaic power system. This article introduces views about power loss into the analysis of maximum power point tracking, discussing in detail the power loss due to the misjudgment during the oscillating and tracking of perturbation and observation method. A revised perturbation and observation method is proposed and by experiments it is proved that it can solve well problems of oscillation, tracking resolution and speed. Keyword：Perturbation and Observation Method, Oscillation, Misjudgment, Power Loss