Generator Reference Frame Rotation

The new IEC 61400-27-1 standard for electrical simulation models of wind turbines is expected to be published by the end of 2014. The purpose of the IEC 61400-27 series is to provide dynamic wind power plant models for power system stability studies. This paper presents the latest and expectedly final changes in the Final Draft International Standard (FDIS). Those changes include the modelling of grid protection system, aerodynamics, reactive power capability, generator reference frame rotation, frequency measurement and power plant controller. The paper will also describe the alignment of the IEC models with the similar Western Electricity Coordinating Council (WECC) models, and the inclusion of the IEC models in a future IEC standard for Common Information Model (CIM) for Dynamics Specification