Grid synchronization structure for wind converters under grid fault conditions
Document typeConference report
Rights accessRestricted access - publisher's policy
This paper presents a grid synchronization structure for three-phase electric power systems based on the use of a filtered quadrature signal generator (FQSG) and a phase-locked loop (PLL) structure, named Adaptive Vector Grid Synchronization system (AVGS). This system estimates the magnitude, frequency and phase of a signal, specially three-phase voltages and currents, and allows fast and accurate detection of the symmetrical components meet with the transient operating requirements imposed by grid codes. The adaptive vector based PLL (VB-PLL) permits offering a proper performance under generic grid conditions, especially under faulty scenarios. For the particular case of grid voltage synchronization of wind turbine converters, the AVGS is adjusted to provide a good response considering the most critical situation, which is the low voltage ride through (LVRT). This paper includes a detailed study of the proposed grid synchronization system and simulations with registers of real grid disturbances provided by Ingeteam Power Technology S.A.
CitationGarcia, J.Ignacio, Candela, J., Luna, A., Catalan, P. Grid synchronization structure for wind converters under grid fault conditions. A: Annual Conference of the IEEE Industrial Electronics Society. "IECON 2016: 42nd Annual Conference of the IEEE Industrial Electronics Society: Florencia, Italia: 23-26 Oct. 2016". Florence: 2016, p. 2313-2318.
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