Isolation mechanism and cross measurement fused photovoltaic hot spot fault diagnosis method

The invention discloses a hot spot fault diagnosis method of a photovoltaic cell panel, and belongs to the field of fault detection of a photovoltaic power generation system. The hot spot fault diagnosis method comprises the steps of firstly, regularly acquiring detection data of each branch in a photovoltaic array, and building an isolation forest-based hot spot fault estimation model of the photovoltaic array, wherein little and different data can be analyzed from a large amount of data by the model so that a fault branch is determined and hot spot fault score is given; and finally, positioning a cell panel with a hot spot fault in the branches by employing a cross measurement method. 本发明公开了种光伏电池板热斑故障检测方法，属于光伏发电系统故障检测领域。首先定时采集光伏阵列中每条支路的检测数据，建立个基于隔离森林的光伏阵列热斑故障评估模型，通过模型可以从大量数据中分析出"少而不同"的数据，从而确定故障支路，并给出热斑故障评分。最后，采用交叉测量的方法定位出支路中具体发生热斑故障的电池板。