Open AccessAnalysis of SSR characteristics in DFIGs based wind farm integrated to a series‐compensated network
Author(s) -
Wang Long,
Huang Biyue,
Sun Haishun,
Chen Yahao,
Liu Yuming
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.9337
Subject(s) - induction generator , series (stratigraphy) , control theory (sociology) , state space , electrical impedance , capacitor , compensation (psychology) , eigenvalues and eigenvectors , engineering , wind power , computer science , mathematics , electrical engineering , physics , voltage , statistics , psychology , paleontology , control (management) , quantum mechanics , artificial intelligence , psychoanalysis , biology
To improve transmission capacity and stability margin of the power system, the doubly fed induction generators (DFIGs) based wind farm is transmitted over lines equipped with series compensation (fixed capacitors). However, the utilisation of series compensation brings the potential risk of subsynchronous resonance (SSR) in the power system. In this study, the SSR issue in DFIGs based wind farm integrated to a series‐compensated network is studied based on the eigenvalue analysis and equivalent impedance model. The linearised state‐space model of DFIGs based wind farm integrated to a series‐compensated network is built first. Participation factors, sensitivities of eigenvalues and root loci, obtained by linearised state‐space model, are observed to investigate the mechanism and the key parameters of SSR. Then, a method that can mitigate SSR in DFIGs based wind farm integrated to a series‐compensated network is proposed based on virtual series resistance of the rotor. At last, the eigenvalue analysis and simulation are conducted to verify the effectiveness of the proposed mitigation method.