Enhancement of demagnetization control for low-voltage ride-through capability in DFIG-based wind farm
- 717 Downloads
Low voltage ride through (LVRT) is one of the most popular methods to protect doubly fed induction generator (DFIG) against balanced and unbalanced voltage dips. In this study, a novel LVRT capability strategy is enhanced using forcing demagnetization controller (FDC) in DFIG-based wind farm. Moreover, not only stator circuit but also rotor circuit were developed by electromotor force (EMF) for LVRT in DFIG-based wind farm. The transient stability performances of the DFIG with and without the FDC and EMF were compared for three- and two-phase faults. In addition to variations such as 34.5 kV bus voltage and terminal voltage of DFIG, speed of DFIG, electrical torque of DFIG and d-q axis rotor-stator current variations of DFIG were also evaluated. It was seen that the system became stable within a short time using the FDC and EMF.
KeywordsDFIG FDC EMF Transient stability
- 10.da Costa JP, Pinheiro H, Degner T, Arnold G (2011) Robust controller for DFIGs of grid-connected wind turbines. IEEE Trans Power Electron 58(9):4023–4038Google Scholar
- 18.Nguyen TDV, Fujita G (2012) Nonlinear control of DFIG under symmetrical voltage dips with demagnetizing current solution. In: IEEE international conference on in power system technology (POWERCON) pp 1–5Google Scholar
- 19.Linyuan Z, Jinjun L, Yangque Z, Sizhan Z (2012) Robust demagnetization control of doubly fed induction generator during grid faults. In: IEEE 7th international power electronics and motion control conference (IPEMC), June, pp 1446-1451Google Scholar
- 30.Krause PC (2002) Analysis of electric machinery, 2nd edn. McGraw-Hill, New YorkGoogle Scholar