Reliable fault diagnosis of on-load tap changers (OLTCs), a critical component for transformer voltage regulation, is essential for ensuring the safe operation of power systems. However, the nonstationary characteristics of switching vibration signals and limited fault data restrict the effectiveness of conventional di...
Zhi-Xin Chen, Tong Zhao, Run-Ze Qi et al.· ISA transactions· 0 citations
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...
Yan-Yong Yang, Xue-Zeng Huang, Yan-Dong Sun et al.· Energies· 0 citations
An on-load tap changer (OLTC) is a key electromechanical switching device for transformer on-load voltage regulation, and its mechanical condition is closely related to equipment reliability. Vibration signals are sensitive to sensor location, so the same fault may exhibit different responses at different locations, wh...
On-load tap changers (OLTCs) are critical to reliable transformer operation, yet mechanical fault samples are difficult to obtain in practice, limiting the feature representation and diagnostic performance of conventional data-driven methods under limited-sample conditions. To address this issue, this paper proposes a...
