Single-phase grid voltage frequency estimation using Teager energy operator-based technique

Md. Shamim Reza, Mihai Ciobotaru, Vassilios G. Agelidis

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)


This paper reports the performance of a technique for the estimation of single-phase grid voltage fundamental frequency under distorted grid conditions. The technique combines a Teager energy operator (TEO) with a frequency adaptive bandpass filter (BPF). The TEO is based on three consecutive samples and is used to estimate the fundamental frequency. The BPF relies on a recursive discrete Fourier transform (RDFT) and an inverse RDFT, and is used to extract the normalized amplitude of the grid voltage fundamental component. The technique is computationally efficient and can also reject the negative effects caused by dc offset and harmonics. It requires less computational effort, can provide faster estimation, and is also less affected by harmonics as compared with a technique relying on the RDFT-based decomposition of the single-phase system into orthogonal components. The performance of the technique is verified using both simulation and experimental results.
Original languageEnglish
Pages (from-to)1218-1227
Number of pages10
JournalIEEE Journal of Emerging and Selected Topics in Power Electronics
Issue number4
Publication statusPublished - Dec 2015
Externally publishedYes


  • Discrete Fourier transform
  • frequency estimation
  • monitoring
  • single-phase voltage system
  • Teager energy operator (TEO)


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