Transient modeling and stability analysis of DFIG under different power control mode

IF 3.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Electric Power Systems Research Pub Date : 2025-02-03 DOI:10.1016/j.epsr.2025.111449

Xiaoyang Deng , Linlin Wu , Xiao Wang , Han Gong , Ruibo Li , Jiaoxin Jia

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引用次数: 0

Abstract

As one of the dominant types of renewable energy generation, the transient characteristics of doubly fed induction generator (DFIG) affect the grid reliability significantly. The stator of DFIG is directly connected to the grid, and its current is strongly influenced by the output angle of the phase-locked loop (PLL). This unique structure results in the power angle of the DFIG more complex, as it cannot be simply derived from the stator voltage. Consequently, the transient process of the DFIG remains not fully characterized. To quantitatively analyze the transient stability of DFIG, a transient model of DFIG based on angle and magnitude is first established. Based on this magnitude-phase model (MPM), this study formulates the nonlinear equations for the DFIG's PLL and defines its power angle. Subsequently, a transient stability analysis method based on the equal area criterion (EAC) is developed, and its conservativeness is evaluated. The stability of the DFIG under different low voltage ride through (LVRT) strategies is compared and analyzed with the EAC, considering various rotor current-to-power angle relationships. Finally, simulations validate that the proposed MPM is accurate and applicable under transient process, and the proposed criterion can effectively estimate the stability of DFIG in transient processes.

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来源期刊

Electric Power Systems Research 工程技术-工程：电子与电气

CiteScore

7.50

自引率

17.90%

发文量

963

审稿时长

3.8 months

期刊介绍： Electric Power Systems Research is an international medium for the publication of original papers concerned with the generation, transmission, distribution and utilization of electrical energy. The journal aims at presenting important results of work in this field, whether in the form of applied research, development of new procedures or components, orginal application of existing knowledge or new designapproaches. The scope of Electric Power Systems Research is broad, encompassing all aspects of electric power systems. The following list of topics is not intended to be exhaustive, but rather to indicate topics that fall within the journal purview. • Generation techniques ranging from advances in conventional electromechanical methods, through nuclear power generation, to renewable energy generation. • Transmission, spanning the broad area from UHV (ac and dc) to network operation and protection, line routing and design. • Substation work: equipment design, protection and control systems. • Distribution techniques, equipment development, and smart grids. • The utilization area from energy efficiency to distributed load levelling techniques. • Systems studies including control techniques, planning, optimization methods, stability, security assessment and insulation coordination.