Impact of Mechanical Power Variation on Transient Stability of DFIG-based Wind Turbine

The input mechanical power affects the transient stability by changing the transient energy of the power system. The mechanical power characteristics of doubly fed induction generator (DFIG)-based wind turbines (WTs) are more complex and the variation ranges are wider when compared with those of syn...

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Bibliographic Details
Published in2018 IEEE 4th Southern Power Electronics Conference (SPEC) pp. 1 - 7
Main Authors Tang, Wangqianyun, Hu, Jiabing, Zhang, Rui
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.12.2018
Subjects
aerodynamics
doubly fed induction generator (DFIG) wind turbine
mechanical power variation
pitch control
Power system stability
Rotors
Stability analysis
Transient analysis
transient stability
Voltage control
wind speed
Wind turbines
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Summary:The input mechanical power affects the transient stability by changing the transient energy of the power system. The mechanical power characteristics of doubly fed induction generator (DFIG)-based wind turbines (WTs) are more complex and the variation ranges are wider when compared with those of synchronous generators (SGs') owing to the different energy conversion mechanisms, which leads the transient stability of DFIG-based WT more diverse. This paper systematically analyzes the impact of the mechanical power variation on the transient stability of DFIG-based WT. Firstly, the analytical model considering the mechanical power is presented. In comparison with SG, the characteristics of mechanical power of the DFIG-based WT are summed up. Then, based on the model, the transient stability of a single DFIG-based WT-connected system is theoretically analyzed. The instability mechanism and phenomena are found to be variable in different wind speeds. Finally, the impacts of the summarized factors of mechanical power on transient stability of DFIG-based WT are discussed, including the wind conditions, aerodynamics and pitch controls.
DOI:10.1109/SPEC.2018.8635978