A two-stage ADALINE for harmonics and interharmonics measurement

Gary W. Chang, Cheng I. Chen, Quan Wei Liang

Research output: Contribution to journalArticlepeer-review

132 Scopus citations


Harmonics and interharmonics may introduce operational problems in electrical and electronic equipment. Therefore, monitoring harmonics/ interharmonics for improving the power quality is of importance for both electric utilities and their customers. In this paper, a cascaded two-stage adaptive linear element (ADALINE) structure for both harmonics and interharmonics measurement is proposed. In addition, a simple laboratory setup implemented by MATLAB and the dedicated hardware for measuring power signals is built to verify the performance of proposed method. Results are compared with those obtained by short-time Fourier transform and two other conventional ADALINE-based methods. It shows that the proposed method is with a better accuracy, even if the power frequency deviation and interharmonic components are present in the measured signal. The proposed method also can be adopted for harmonic/ interharmonic compensation devices in real time.

Original languageEnglish
Pages (from-to)2220-2228
Number of pages9
JournalIEEE Transactions on Industrial Electronics
Issue number6
StatePublished - 2009


  • Adaptive linear element (ADALINE)
  • Frequency deviation
  • Harmonics
  • Interharmonics
  • Nonlinear loads


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