Protection and local control of HVDC-grids

This Technical Brochure presents the principal design of HVDC meshed grid protection and local control systems. It describes the requirement on HVDC grid protection and control, system earthing schemes, short circuit phenomena, short circuit interruption and short circuit limiting methods, protection philosophies and functions. The guide includes the possible measurement methods and protection functions for HVDC grid protections including fault location methods to minimise the repair time after a short circuit occurrence.