A Nine Switch Converter-Based Fault Ride Through Topology for Wind Turbine Applications

Aram Kirakosyan, Mohamed Shawky El Moursi, Parag Kanjiya, Vinod Khadkikar

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


This paper proposes a new fault ride-through (FRT) configuration for a fixed-speed induction generator-based-wind turbine (FSIG-WT). It utilizes a nine-switch converter (NSC) to enable shunt and series compensation in response to the system dynamics and grid faults. The steady-state control strategy and transient-management scheme are developed to ensure proper performance in steady-state, dynamic operation as well as enhanced FRT capability of the FSIG-WT. In addition to that, the developed control strategy tackles the balanced and unbalanced operation of the electric grid with an enhanced positive- and negative-sequence compensation control scheme. The recently reported grid synchronization scheme, namely, the frequency-locked loop (FLL) is implemented to achieve fast phase detection and transient response. Consequently, the performance of the FLL has been compared with the multiple reference-frame-phase-locked loop (MRF-PLL) to demonstrate its superior performance for enhancing transient response. The proposed topology, FLL, and control strategies are verified through a comprehensive simulation study to demonstrate the enhancement of the transient response and FRT capability of FSIG-WT in adherence to grid-code requirements.

Original languageBritish English
Article number7442868
Pages (from-to)1757-1766
Number of pages10
JournalIEEE Transactions on Power Delivery
Issue number4
StatePublished - Aug 2016


  • Fault ride-through
  • frequency-locked loop
  • nine switch converter
  • positive- and negative-sequence compensation
  • shunt and series compensation


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