Impact of Short-Circuit Ratio on Control Parameter Settings of DFIG Wind Turbines

Joaquín Pedra (), Luis Sainz and Lluís Monjo
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Joaquín Pedra: Department of Electrical Engineering (ETSEIB-UPC), Universitat Politècnica de Catalunya, Av. Diagonal 647, 08028 Barcelona, Spain
Luis Sainz: Department of Electrical Engineering (ETSEIB-UPC), Universitat Politècnica de Catalunya, Av. Diagonal 647, 08028 Barcelona, Spain
Lluís Monjo: Department of Electrical Engineering (EPSEVG-UPC), Universitat Politècnica de Catalunya, Av. Victor Balaguer 1, 08800 Vilanova i la Geltrú, Spain

Energies, 2024, vol. 17, issue 8, 1-14

Abstract: This work deals with doubly fed induction generator (DFIG) modeling and stability when connected to weak AC grids. A detailed state-space model that includes the phase-locked loop (PLL) is developed. This work aims to determine the influence of the network’s strength on DFIG stability through the short-circuit ratio (SCR). The critical values of the proportional control parameters of the grid-side and rotor-side converters (RSC and GSC), as well as PLL, which make the system unstable, are calculated for different SCR values. Finally, PSCAD/EMTDC dynamic simulations are used to validate the critical control parameters obtained by studying the eigenvalues of the DFIG state-space model regarding system stability.

Keywords: DFIG stability; eigenvalue analysis; state-space models; controller parameter settings; weak grid stability; stability boundary (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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