Approximation of Grid Connected Higher Order Wind Turbine Generator System Employing Direct Truncation

The presented research article is providing the approximation of mathematically modelled higher order wind turbine generator (HOWTG) system. The modelling of eighth order WTG system is formulated by utilizing system parameters value, primarily. Then, the eighth order HOWTG is approximated to comparatively lower order (LO) WTG model. The approximation of HOWTG is done with the help of direct truncation (DT) approximation approach. The truncated second, third, fourth, fifth, sixth, and seventh order LOWTG models are proposed for HOWTG system. To determine the best suited LOWTG model for HOWTG system, the obtained results are supported by findings and discussion in the terms of plots and tabulated data. The step response, error plot, and Bode plot are provided to highlight the compatibility of approximated LOWTG model with respect to HOWTG system. The approximated models are also compared with respect to HOWTG by considering time domain specifications and error index values in this contribution.