IEC Technical Specification 63487

IEC TS 63487:2026 serves as a specification for the joint commissioning of grid-connection of offshore wind farms (GCOWF) using the voltage source converter based high voltage direct current (VSC HVDC) transmission system.
This document provides the technical specification on the commissioning precondition, objectives, procedures, items, methods and requirements of grid-connection of offshore wind farms using the VSC HVDC power transmission, particularly focusing on the special test items of offshore wind farms.
This document covers the commissioning of offshore wind farms, testing of onshore DC energy dissipation device, special test items for transmission test, coordination function testing among VSC HVDC, DC energy dissipation device, offshore wind farm and automatic generation control (AGC). However, the conventional commissioning test items of the onshore VSC HVDC system are out of scope.