直流微网实验中数字式光伏模拟器的研究与开发

Research and development of digital photovoltaic simulator in DC micro-network experiments

直流微网实验中,光伏电池必不可少,然而,光伏电池的铺设面积及输出等不确定因素使得光伏模拟器的研究成为必然。根据光伏模块的等效电路模型,并结合Simulink中的模块,搭建立了光伏电池仿真模型,根据模型的输出特性,采用了基于DSP28335控制的Buck斩波电路实现光伏特性的输出,给出了主电路及检测保护电路的设计,分析并研究了光伏跟踪的几种算法,最后给出了几种算法下的输出波形并绘制了光伏模拟器的输出特性曲线。

In DC micro-network experiments, the photovohaic cells are essential, however, it is necessary to develop digital photovohaic simulator because of the laying area and uncertain output of the photovoltaic cells. A photovohaic cell simulation model is established based on the equivalent circuit model by combining with the block of Simulink. According to the model＇s output characteristics, a Buck chopper controlled by DSP 28335 is designed to achieve the output of photovoltaic properties. The design of main circuit and detection protection circuit are given, several algorithms of photovohaic tracking are analyzed. Finally, the photovohaic simulator output characteristic curve and output waveform of different algorithms are also put forward.