Modeling of Variable Speed Wind Turbines with Doubly Fed Induction Generator for Studying Steady State Operation.

El-Saadawi, Magdi Mohamed Ali; Kaddah, Sahar Sidky; Abd El-Hamid Osman, Mohamed Galal; El-Drieny, S. A.; Abdel-Wahab, M. N.

doi:10.21608/bfemu.2020.123634

Modeling of Variable Speed Wind Turbines with Doubly Fed Induction Generator for Studying Steady State Operation.

Document Type : Research Studies

Authors

¹ Associate Professor., Electrical Power Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.

² Electrical Power Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.

³ Professor of Electrical Power Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.

⁴ Egyptian Electricity Transmission Co. Egypt.

10.21608/bfemu.2020.123634

Abstract

Wind energy conversion has emerged as a viable alternative to meet the increased demand for energy resources in recent years. Wind (arms interconnected to power system bring new challenges to power system operation. It is imperative to study the impact of variable speed wind turbine coupled to doubly fed induction generator DFIG on utility grid operation.
A mathematical model has been developed to evaluate the steady state performance of the variable speed wind energy conversion system with DFIG. In addition a steady state converter (rectifier-inverter) model as a function of siring angles of the rectifier and inverter is developed and used directly to calculate the influence of DFIG on power system operation through power flow solution. These units are modeled as P-Y bus(es) to manage the reactive power generation inside the wind farmi. The paper presents and validates a model of DFIG suitable for operation in steady state mode and not only able to support voltage by feeding reactive power but also to fulfill grid requirement. The proposed algorithm is implemented and applied to the IEEE 26-bus system and the number of the equivalent wind turbines generating units WTGU at each generating bus is demonstrated and injected as P-V bus(es). The impact of WTGUs on active and reactive power of own generating bus(es) and slack bus at different wind speeds is also investigated.

Keywords