Impact of Phase Angle Jump on a Doubly Fed Induction Generator under Low-Voltage Ride-Through Based on Transfer Function Decomposition

Peiru Feng, Jiayin Xu, Zhuang Wang (), Shenghu Li, Yuming Shen and Xu Gui
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Peiru Feng: State Grid Anhui Electric Power Co., Ltd., Hefei 230009, China
Jiayin Xu: State Grid Anhui Electric Power Co., Ltd., Hefei 230009, China
Zhuang Wang: School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China
Shenghu Li: School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China
Yuming Shen: State Grid Anhui Electric Power Co., Ltd., Hefei 230009, China
Xu Gui: State Grid Anhui Electric Power Co., Ltd., Hefei 230009, China

Energies, 2024, vol. 17, issue 19, 1-17

Abstract: During the fault period, a phase angle jump may occur at the stator or the point of common coupling, which will deteriorate the low-voltage ride-through (LVRT) characteristics of a doubly fed induction generator (DFIG). The existing LVRT studies focus on the impact of a voltage drop on DFIGs but often ignore that of a phase angle jump. The time-domain simulation is accurate in describing the response of a DFIG during the LVRT process, but it is time-consuming for a DFIG with the full-order model. In this paper, by using the voltage magnitude and phase angle of the stator or the point of common coupling as the inputs, and the state variables as the outputs, the transfer function of a DFIG is derived to analyze its response and find the LVRT measures against the voltage drop and, especially, the phase angle jump. Firstly, the differential-algebraic equations of the DFIG are linearized to propose their transfer function model. Secondly, considering its high-order characteristic, a model reduction method for the transfer function of the DFIG using the Schur decomposition is proposed, and the analytical expression of the output variables of the DFIG with the phase angle jump is derived by the inverse Laplace transformation to judge the necessity of the LVRT measures. Finally, the simulation results of the DFIG are provided to verify the accuracy of the transfer function model and its reduced-order form and validate the feasibility of the LVRT against the phase angle jump with the proposed models.

Keywords: voltage drop; phase angle jump; doubly fed induction generator (DFIG); transfer function; Schur decomposition; low-voltage ride-through (LVRT) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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