US Patent Issued to HITACHI ENERGY on Oct. 6 for "DC fault management in electrical power system" (Swedish Inventor)

ALEXANDRIA, Va., Oct. 6 -- United States Patent no. 12,756,177, issued on Oct. 6, was assigned to HITACHI ENERGY LTD (Zurich, Switzerland).

"DC fault management in electrical power system" was invented by Sasitharan Subramanian (Ludvika, Sweden).

According to the abstract* released by the U.S. Patent & Trademark Office: "Embodiments herein provide a protection method of protecting a Modular Multilevel Converter (MMC) for Direct Current (DC) fault protection in a symmetrical monopole configuration. The MMC for each of at least one phase comprises a leg, which comprises a first branch and a second branch comprising director valves connected in series. Further, legs of the MMC are connected in series between DC poles. The method comprises me...