Washington, D.C., subway will idle some railcars after separation incident

The Washington, D.C.-area subway system said it will indefinitely idle its fleet of 6000-series railcars following a train-separation incident on Tuesday, the second in recent weeks.
IEEE

Zero-Sequence Current and Voltage Control Strategy of Multiple MMCs for Single-Phase Ground Fault Protection in AC–DC Hybrid Distribution Networks

Abstract: The ac/dc hybrid distribution network (HDN) is facing great challenges under single-phase ground (SPG) fault. To ensure the continuous and stable operation of ac/dc HDNs, it is essential ...
Railway Technology

Skoda reveals first four-car train for Sofia Metro

Skoda Group has launched the first four-car metro train for Sofia, the capital of Bulgaria, at its manufacturing site in ...
IEEE

Mixed-Signal Sliding Mode Controller for Non-Inverting Buck-Boost Photovoltaic DC Optimizers

Abstract: Photovoltaic (PV) dc optimizers require input voltage regulation over a wide range to maximize power extracted from PV panels. As such, seamless reference tracking and robust stability are ...