Fast grid synchronization technique based on a multiple cascaded general integrator scheme for distributed generation inverters
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hdl:2117/16762
Document typeConference report
Defense date2012
Rights accessRestricted access - publisher's policy
Abstract
This paper proposes a new structure for grid
synchronization based on generalized integrators (GI) that lead
to fast detection of positive and negative components of the grid
voltage. The GI are used as a band pass filter (GI-BPF) mainly
to provide in-phase and quadrature components of grid
voltage. The proposed structure consists in the cascaded
connection of multiple GI-BPF to achieve a faster time response
than a single GI-BPF but with the same bandwidth
characteristics. This structure is used with a frequency locked
loop and a positive sequence detector to operate under
unbalanced voltage sags. Simulations and experimental results
of a photovoltaic power system injecting power to the grid in
the stationary reference frame are shown to validate this
proposal. Comparisons between this proposal and one that uses
a single GI-BPF in the sequence detector are provided. The
results show that the proposed cascaded GI-BPF achieves a
considerably time response reduction in the sequence grid
detection under a fault with the same quality-filter
characteristics.
CitationMatas, J. [et al.]. Fast grid synchronization technique based on a multiple cascaded general integrator scheme for distributed generation inverters. A: IEEE International Symposium on Industrial Electronics. "ISIE 2012: proceedings of the IEEE International Symposium on Industrial Electronics". Hangzhou: 2012, p. 1003-1010.
ISBN978-146730158-9
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