Development of a Digital Twin-Based Transformer Partial Discharge Diagnostic System

Degradation of insulation performance in power transformers is a critical factor contributing to equipment failure and accidents. This degradation is closely linked with the generation of partial discharge (PD) signals within the insulation material. Notably, PD serves as early indicators of potential faults, necessitating real-time monitoring. To address this, Ultra-high frequency (UHF) sensors have been increasingly adopted for internal installation in transformers to detect PD signals. Accurate detection and localization of PD sources therefore play a key role in preventing insulation performance degradation in power transformers.