Abstract
This letter proposes a control solution to mitigate the problem of converter over-modulation in doubly fed induction generator (DFIG)-based wind turbine generators (WTGs). Overmodulation is a critical reason in failing to ride through asymmetrical faults and inject positive- and negative-sequence reactive currents (I1R and I2R) per grid code requirements. Analytical expressions are first proposed to independently calculate the transient, positive- and negative-sequence current components. The I2R injection factor is then optimized to mitigate the problem of steady-state over-modulation. The transient components are eliminated in the inner-loop control to mitigate the problem of transient over-modulation. The proposed control solution is validated with EMT-type simulations. The results show that the transient performance and the fault ride through (FRT) capability are significantly improved.
Original language | English |
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Article number | 10119222 |
Pages (from-to) | 1-4 |
Number of pages | 4 |
Journal | IEEE Transactions on Sustainable Energy |
DOIs | |
Publication status | Published - 2 May 2023 |
Keywords
- Asymmetrical fault
- Couplings
- doubly fed induction generator (DFIG)
- Doubly fed induction generators
- fault ride through
- Phase locked loops
- Rotors
- Stators
- Transient analysis
- Voltage control
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment