I. Introduction
With the popularity of edge cloud technology in power systems, vast amounts of data are generated daily from various terminal devices, among which image data is the most common. They can significantly contribute to the safe production and efficient operation of electric power. However, these image data generated from terminal devices have the following characteristics: 1. They are incredibly discrete in distribution and challenging to aggregate. 2. The amount of data generated from individual devices is small, and the performance of the devices could be improved, making it impossible to train high-performance models locally. 3. The distribution of data is uneven, making it almost impossible to annotate all images.