Transients in wind power plants - part I: Modeling methodology and validation

Abstract

This is the first part of a two-paper series and presents the modelling methodology for all the main components of a typical wind power plant for power system transient studies. The models developed are intended for investigation of the temporary overvoltages, switching overvoltages and lightning overvoltages. The component models developed include the high frequency models of the vacuum and SF6 circuit breakers, three core cables for the collector grid and quad core cables for the wind turbine tower, turbine transformer, doubly-fed asynchronous generator, and surge arrester. The models developed are wideband in nature and can be used for all studies except the transformer model which requires two variations for the low-mid frequency range and mid-high frequency range. Detailed user defined models developed for both vacuum and SF6 circuit breakers take account of the re-strikes, re-ignitions, pre-strikes, low frequency high current interruption and high frequency low current interruption. The generator and transformer transient models include a representation of the various high frequency capacitive couplings. Success criteria for each individual component model are discussed and the model performance is validated against these criteria.