基于准滑模控制的单相光伏并网系统

在对系统进行拓扑基础上,本文建立了单相光伏并网系统主电路的动态数学模型,根据准滑模控制逆变工作原理对系统的最大功率点跟踪(MPPT)算法进行了分析,完成了准滑模并网控制的逆变单元实验。结果表明,本文所建立的模型能够实现功率因数为1的并网控制目标,具有动态响应快、稳态跟踪性能优良的特点,给出的系统设计方法是正确和可行的。

Approach to single phase photovoltaic grid-connected system based on quasi-sliding mode control

After proposing the topological structure of the single phase photovoltaic grid-connected system, the dynamic mathematical model of the system main circuit is set up. Maximum power point tracking （MPPT） algorithm is analyses briefly based on-quasi-sliding mode control principle, then introduces the quasi-sliding mode grid-connected control experiment. The results show that photovoltaic grid-connected system model based on quasi-sliding mode control not only can realize the target that the power factor closing to 1, but also has the advantages of fast dynamic response and good steady trackin~ oefformance, thus the approach given by this oaoer is feasibility and practicability for nractice.