Research on the Short-Circuit Mechanical Characteristics of Filter Transformers in New Power Systems

In the scenario of the global energy structure undergoing accelerated adjustments and new energy being massively integrated, harmonic pollution has emerged as a factor exacerbating the stability issues of power systems. Filter transformers, as crucial equipment for harmonic mitigation, demand high operational reliability. This paper centers on a three-phase short-circuit fault that occurred at the site of a particular filter transformer. It dissects the structural features and short-circuit checking methods of this transformer, and conducts in-depth research on its short-circuit mechanical properties. The research findings uncover the force-bearing characteristics and failure mechanisms of the filter windings during short-circuit conditions. These results serve as a significant foundation for the optimal design of filter transformers, ensuring their safe operation, and promoting the stable development of new-generation power systems.