Influence of Harmonics and Load Fluctuations on Dissolved Gas Analysis for Oil-Filled Transformers Connected to Photovoltaic Power Generating Systems

Dissolved Gas Analysis (DGA) is used worldwide as a maintenance management method for oil-filled transformers. In Japan, the Electrical Technology Research Association (ETRA) has established management standards and diagnostic methods. These standards were established based on the actual operation data. In this study, to establish a new diagnostic method for oilfilled transformers connected to photovoltaic (PV) power generating systems, we conducted