Abstract
The second-order-generalized-integrator-based freq-uency-locked loop (SOGI-FLL) is a well-known tool for filtering and synchronization purposes in the power and energy applications. The SOGI-FLL, nevertheless, has a limited ability in rejecting the grid voltage disturbances. To deal with this problem, two advanced SOGI-FLLs have been proposed recently. In the first one, a SOGI-based filter is included inside the standard SOGI-FLL control loop, and in the second one, a SOGI-based filter is employed as the prefiltering stage of the SOGI-FLL. The small-signal modeling, tuning procedure, and detailed performance comparison of these advanced SOGI-FLLs have not been carried out yet. The aim of this paper is to cover these issues.
Original language | English |
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Article number | 8295261 |
Journal | I E E E Transactions on Power Electronics |
Volume | 33 |
Issue number | 12 |
Pages (from-to) | 10229-10239 |
Number of pages | 11 |
ISSN | 0885-8993 |
DOIs | |
Publication status | Published - Dec 2018 |
Keywords
- Filters
- frequency estimation
- frequency-locked loop (FLL)
- phase detection
- second-order generalized integrator (SOGI)
- synchronization