PD IEC TR 63411:2025 PDF

1 Scope The voltage source converter based on high-voltage direct current (VSC-HVDC) transmission technology has attracted increasing attention because of its advantages such as flexible control, supply to passive systems, and black start capability, which has been widely used in offshore wind farm integration. Although offshore wind farms generate electricity just like any other power plants on a system-wide level, such offshore wind generation has quite distinctive characteristics to be considered in terms of capacity optimization, voltage and power control, fault response, multi-frequency oscillation, power DC collection, etc., when compared to conventional generation integration via HVDC. Understanding these distinctive characteristics and their interaction with the other parts of the power system is the basis for integrating large-scale offshore wind farms via VSC-HVDC. This document discusses the challenges of connecting offshore wind farms via VSC-HVDC, key technical issues and emerging technologies. The potential solutions include new technologies, methods and practices to provide more flexibility and improve the efficiency of power systems. The primary objective of this document is to provide a comprehensive overview of challenges, potential solutions, and emerging technologies for grid integration of large-scale offshore wind farms via VSC-HVDC. It is expected that this document can also provide guidance for further standardization on relevant issues. The purpose of this document is not intended to hinder any further development of state...