基于扰动观测法的改进MPPT算法研究

Improved MPPT algorithm research based on perturbation observation method

根据目前阿克苏地区光伏发电场的运行情况,发现光伏发电技术还存在着光-电转换率低、输出功率不稳定等问题,很大程度上影响着该地区光伏发电场的经济运行。因此,为了促进光伏发电的进一步发展、稳定输出功率、提高光伏发电技术的光电转换率,在分析光伏发电的模型和研究光伏发电最大功率点跟踪(MPPT)技术的基础上,提出改进的扰动观测法(SVM改进扰动法),并利用Simulink仿真软件进行仿真分析,通过仿真结果证明改进的扰动观测法消除了震荡,有效地减少了扰动次数和跟踪时间、提高了最大功率点的跟踪精度和速度。

According to the current running situation of photovoltaic farms in Aksu, it is found that the technology of photovoltaic power generation still exists the problems such as low optical-electric conversion rate and unstable output power, thus largely affects the economic operation of the photovoltaic farms in the region. Therefore, in order to promote the further development of photovoltaic power generation, stable output power, and improve optical-electric conversion rate of photovoltaic power generation technology, the improved perturbation observation method （SVM improved perturbation method） is proposed by analyzing the photovoltaic power generation model and researching of the photovoltaic maximum power point tracking （MPPT） technique. The simulation analysis is made by using Simulink software. The simulation results prove that the improved perturbation observation method can eliminate oscillation, effectively reduce the perturbation frequency and tracking time, and improve the tracking precision and speed of the maximum power point.