I. Introduction
With the promotion of the "dual carbon" goal, renewable energy sources such as wind power and photovoltaic have rapidly developed. Inverters convert direct current generated by renewable energy sources such as photovoltaic into alternating current that meets grid connection requirements, so that playing a crucial role in renewable energy generation systems. Once the inverter malfunctions, it may cause damage to other equipment in the renewable energy generation system and even threaten personal safety. Statistical data shows that inverter faults account for 60% of common faults in the operation of photovoltaic power plants, and it is very important to quickly and accurately diagnose inverter faults [1]-[2].