IEEE Draft Guide for the Selection of Neutral-Grounding Devices for High Voltage Direct Current (HVDC) Converter Transformers

This guide recommends the applications, selection principles, technical requirements and test requirements for dry-type and liquid immersed neutral-grounding devices used with HVDC converter transformers. This guide applies to HVDC converter transformers with a star connected winding on the grid side and a delta connected winding on the valve side.