PSCAD/EMTDC based dynamic modeling and analysis of a variable speed wind turbine

Abstract

The paper presents dynamic modeling and simulation of a grid connected variable speed wind turbine (VSWT) using PSCAD/EMTDC, a widely used power system transient analysis tool. A variable speed wind generator with power electronics interface is modeled for dynamic simulation analysis. Component models and equations are addressed and their incorporations into the EMTDC are provided. Controllable power inverter strategies are intended for capturing the maximum power under variable speed operation and maintaining reactive power generation at a predetermined level for constant power factor control or voltage regulation control. The component models and control schemes are constructed by user-define function provided in the simulation program. Simulation case studies provide the variable speed wind generator dynamic performance for changes in wind speed. This modeling work can be employed to evaluate impacts on power grid as well as the control scheme and output performance of a variable speed wind power system at the design state.