Fast Estimation of Phase and Frequency for Single-Phase Grid Signal

Hafiz Ahmed, Sid Ali Amamra, Ivan Salgado

Research output: Contribution to journalLetterpeer-review

47 Citations (Scopus)


Accurate and fast estimation of single-phase grid voltage phase and frequency has the potential to improve the performances of various control and monitoring techniques used in electric power systems. This letter applies an adaptive sliding mode observer for frequency and phase estimation. The observer is simple, easy to tune, and suitable for real-time implementation. The proposed adaptive observer can be considered as an alternative to a phase-locked loop (PLL) with better performance. dSPACE-based experimental results are given to show the effectiveness and performance improvement of the proposed approach with respect to two other advanced PLL techniques, namely, pseudolinear enhanced PLL and second-order generalized integrator-frequency locked loop.

Original languageEnglish
Article number8424190
Pages (from-to)6408-6411
Number of pages4
JournalIEEE Transactions on Industrial Electronics
Issue number8
Early online date1 Aug 2018
Publication statusPublished - 1 Aug 2019
Externally publishedYes


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