Zhi-Qiang Zheng

Vibration-Based Fault Diagnosis of Power-Transformer On-Load Tap Changers Using SGMD and CMPA-SMAGNet

Fault diagnosis of power-transformer on-load tap changers (OLTCs) is difficult because their vibration signals are nonlinear and nonstationary. This study evaluates CMPA-SMAGNet, a diagnostic framework that combines symplectic geometry mode decomposition (SGMD), a dual-branch multi-scale network, and a chaotic marine p...