摘要
Interconnections between AC power systems,power transmission with higher efficiency,and aggregation and delivery of power from offshore wind farms to different AC regions are among the main drivers for the development of HVDC grids.HVDC grids can result in lower demand variability,higher flexibility,superior electricity market management,and higher economic value.It is expected that isolated HVDC systems transition to an HVDC grid that overlays the existing AC grid.Such a substantial development also results in a number of critical technical challenges related to system control,operation,and protection,which should be properly and accurately addressed.This Special Issue focuses on the recent achievements and advancements in overcoming these challenges.Accepted papers for publications in this Special Issue fall into four major topics:devices,control,operation,and protection.
