Research on online accurate detection method for transformer energy efficiency

Reducing consumption and increasing efficiency is an important task in building a new type of power system to achieve the target of dual carbon. 40% of losses in the power system come from transformers. However, due to limitations in current testing techniques, lack of regulatory measures, and human factors, there is still a certain distance to achieve the expected goals. Clarifying the relationship between offline measurement values of transformer losses and actual operating losses, controlling transformer loss indicators well, and researching new technologies for improving transformer energy efficiency urgently require new breakthroughs in online testing technology for transformer losses. This article summarizes the mechanism of transformer losses and related technical parameter indicators, proposes online detection technology for transformer losses and methods to improve measurement accuracy. The practical application cases have verified that this method can achieve good results, laying the foundation for improving the energy efficiency of transformer operation in the future.