State Grid Shandong Electric Power Company (China)

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 mul...

A Study on Power Grid Project Portfolio Based on Multiscale Feature Integration

Power grid companies have established a feasibility study reserve phase to optimize the rolling schedule of annual investments, in which projects undergo preliminary feasibility studies, are incorporated into a project reserve pool, and subsequently proceed through release, imple...

Ultra-Short-Term Distributed PV Power Forecasting Based on Correlation Sparse Modeling and Uncertainty Pattern Forecasting

Accurate ultra-short-term power interval forecasting for distributed photovoltaic (DPV) systems is crucial for the intra-day operation of distribution networks. However, existing studies still face two major limitations. First, most spatiotemporal forecasting methods are develope...