Towards the New Low-Order System Frequency Response Model of Power Systems with High Penetration of Variable-Speed Wind Turbine Generators

In the recent years, frequency support from converter-connected wind power generation has been a hot topic in the field of power system dynamics and control. At the same time, the share of wind generation in the power systems worldwide has significantly risen. Therefore, it is necessary to discuss a new approach to low-order system frequency response (SFR) modelling of power systems. In this paper, a new low-order SFR model of a power system with high penetration of wind power generation is proposed by taking into account the different operating regimes of variable-speed wind turbine generators (VSWTGs). The results are compared to the nonlinear transient stability dynamic models to show that the low-order model adequately describes the nonlinear model. The proposed model can be used (e.g. by researchers, students or power system operators) to qualitatively simulate power system frequency behaviour for different operating scenarios.