Management of Dissolved Gas Generation in Transformer Insulating Oil Applied to Photovoltaic Solar Power Plants

Photovoltaic systems have emerged as an essential solution for renewable energy generation; however, they require special attention regarding the operation and maintenance of their components, such as power transformers. This article aims to contextualize a topic studied in the MBA in Renewable Energy Management, addressing the management of dissolved gas generation in power transformers used in photovoltaic systems, especially those subjected to large amounts of harmonic currents that are harmful to the equipment. Initially, an overview of transformers was presented, followed by a discussion on insulating oil, including aspects related to operation and maintenance, as well as the K factor of the devices. An exploratory study was conducted in a solar park located in the Mesoregion of the Far West of Bahia, where no maintenance records for the transformers existed, and they were experiencing frequent shutdowns during full-load operation. The investor decided to hire an emergency inspection to perform a general analysis and oil sampling of the transformers to determine the next steps, aiming to implement scheduled maintenance. However, several necessary corrections were identified. In conclusion, it was found that the transformers presented critical issues earlier than expected, resulting from inadequate design conditions and the operation of the park.Keywords: Power transformers; Dissolved Gases; Insulating Oil; K Factor; Solar Park.