ABB Files Patent for Smart-Controlled DC Grid Protection Devices
Time:2026-05-14 Browse: 0
ABB Ltd., a global leader in power and automation technologies, has filed a patent for a DC grid system (CN121440504A), submitted in July 2025. The innovation focuses on enhancing the intelligent control of protection device switches within direct current (DC) networks.
The patented DC grid comprises multiple electrical nodes, interconnected by one or more electrical branches, with protection devices installed at each branch. Each protection device features switch components and a magnetic apparatus connected in series between the device terminals. Notably, each protection device is coupled with a control unit capable of selectively opening or closing one or more switches in the device, enabling dynamic, automated protection and operational control.
This invention addresses the growing demand for smart, reliable DC grid systems, particularly in sectors integrating renewable energy, electric vehicles, and high-voltage DC transmission. By enabling precise, automated switch control, ABB’s solution enhances grid safety, stability, and operational efficiency, paving the way for more resilient and intelligent energy networks.
The patent underscores ABB’s commitment to innovation in DC power technologies, supporting the transition toward digitalized, flexible, and intelligent electrical infrastructure worldwide.
