Fast and accurate frequency estimation in distorted grids using a three-sample based algorithm

Md Shamim Reza, Md Maruf Hossain, Vassilios G. Agelidis

Research output: Contribution to journalJournal articleResearchpeer-review


This study proposes a frequency estimation technique for single-phase systems in the presence of harmonic pollution. The technique is based on three consecutive samples and has an infinite-impulse response, thus being a relatively simple one. It is immune to harmonic distortion at both nominal and off-nominal frequencies. In addition, it offers frequency step estimation with a settling time of one nominal fundamental cycle. Compared to the competing algorithm based on three consecutive samples, the proposed one offers a faster dynamic response and improved estimation at steady state, and is also computationally efficient, thus requiring less hardware and cost for implementation. Simulated and real-time experimental results confirm that the proposed technique exhibits superior performance when compared to the considered similar algorithm.
Original languageEnglish
JournalIET Generation, Transmission and Distribution
Issue number18
Pages (from-to)4242-8
Publication statusPublished - 2019

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