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An improved control strategy to the frequency regulation of DFIG based wind turbine
This paper proposes an improved control strategy (ICS) to improve the frequency regulation capability of a Doubly Fed Induction Generator (DFIG) based on the relationship between the rotor speed, the frequency of rotor current, and the frequency of the power system. First, the function between the reference value of the active power of a control system of rotor side converter (CSRSC) and the frequency of the rotor current under a nominal frequency of the power system is deduced. Second, the reference value of active power of the CSRSC is modified according to the function and the measured output of active power and frequency excursion of a power system, ensuring the frequency disturbance of the power system is reduced. A Doubly Fed Induction Generator (DFIG) is used to study the validity of the ICS. A 1.5-MW DFIG model is built in the DIgSILENT/PowerFactory. Simulation results of different systems and different wind conditions demonstrate that the frequency excursion of the power system, caused by wind fluctuation, is reduced significantly with the ICS. Consequently, the proposed control strateg can improve the frequency stability of the power system with wind energy under wind speed fluctuation.
An improved control strategy to the frequency regulation of DFIG based wind turbine
This paper proposes an improved control strategy (ICS) to improve the frequency regulation capability of a Doubly Fed Induction Generator (DFIG) based on the relationship between the rotor speed, the frequency of rotor current, and the frequency of the power system. First, the function between the reference value of the active power of a control system of rotor side converter (CSRSC) and the frequency of the rotor current under a nominal frequency of the power system is deduced. Second, the reference value of active power of the CSRSC is modified according to the function and the measured output of active power and frequency excursion of a power system, ensuring the frequency disturbance of the power system is reduced. A Doubly Fed Induction Generator (DFIG) is used to study the validity of the ICS. A 1.5-MW DFIG model is built in the DIgSILENT/PowerFactory. Simulation results of different systems and different wind conditions demonstrate that the frequency excursion of the power system, caused by wind fluctuation, is reduced significantly with the ICS. Consequently, the proposed control strateg can improve the frequency stability of the power system with wind energy under wind speed fluctuation.
An improved control strategy to the frequency regulation of DFIG based wind turbine
Teng, Weijun (author) / Meng, Yongqing (author)
2017-11-01
13 pages
Article (Journal)
Electronic Resource
English
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