FREQUENCY CONTROL STRATEGY OF DOUBLY-FED WIND GENERATORS CONSIDERING GRID FREQUENCY DEVIATION

Xu Yien; Yang Dejian; Zheng Taiying; Zhang Xinsong; Hua Liang

doi:10.19912/j.0254-0096.tynxb.2021-0340

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (10) : 229-235. DOI: 10.19912/j.0254-0096.tynxb.2021-0340

FREQUENCY CONTROL STRATEGY OF DOUBLY-FED WIND GENERATORS CONSIDERING GRID FREQUENCY DEVIATION

Xu Yien¹, Yang Dejian¹, Zheng Taiying², Zhang Xinsong¹, Hua Liang¹

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Abstract

When a large distur bance occurs in the power system,the existing droop control method of doubly-fed induction generators （DFIGs） are unable to fully utilize its rotating kinetic energy to provide frequency response service for the power grid. This paper proposed a frequency control method with variable droop control coefficient considering the system frequency deviation. The proposed method couples the variable droop control coefficient with the system frequency deviation so as to regulate the control coefficient according to the frequency deviation and further realizes that the DFIGs provide frequency support for the power system with more efficiency under severe disturbances. The power system model with high wind power penetration is established by using EMTP-RV simulation platform. The simulation results show that DFIGs can effectively improve frequency response capability and reduce the maximum frequency deviation when different disturbances occur in the power system,especially in the case of a severe disturbance.

Key words

wind power / wind turbines / electric grid frequency regulation / variable droop coefficient / frequency response

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Xu Yien, Yang Dejian, Zheng Taiying, Zhang Xinsong, Hua Liang. FREQUENCY CONTROL STRATEGY OF DOUBLY-FED WIND GENERATORS CONSIDERING GRID FREQUENCY DEVIATION[J]. Acta Energiae Solaris Sinica. 2022, 43(10): 229-235 https://doi.org/10.19912/j.0254-0096.tynxb.2021-0340

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