Single-Phase Active Power Harmonics Filter by Op-Amp Circuits and Power Electronics Devices

Emad Samadaei, Mina Iranian, Mohammad Reazanejad, Radu Godina, Edris Pouresmaeil

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)
203 Downloads (Pure)


This paper introduces a new structure for single-phase Active Power Harmonics Filter (APHF) with the simple and low-cost controller to eliminate harmonics and its side effects on low voltage grid. The proposed APHF includes an accurate harmonic detector circuit, amplifier circuit to trap tiny harmonics, switching driver circuit for precise synchronization, and inverter to create injection current waveform, which is extracted from reference signal. The control circuits are based on electrostatic devices consist of Op-Amp circuits. Fast dynamic, simplicity, low cost, and small size are the main features of Op-Amp circuits that are used in the proposed topology. The aim is removing the all grid harmonic orders in which the proposed APF injects an appropriate current into the grid in parallel way. The proposed control system is smart enough to compensate all range of current harmonics. A prototype is implemented in the power electronics laboratory and it is installed as parallel on a distorted grid by the non-linear load (15 APeak-Peak) to verify the compensating of harmonics. The harmonics are compensated from THD% = 24.48 to THD% = 2.86 and the non-sinusoidal waveform is renovated to sinusoidal waveform by the proposed APHF. The experimental results show a good accurate and high-quality performance.
Original languageEnglish
Article number4406
Number of pages13
Issue number12
Publication statusPublished - 2018
MoE publication typeA1 Journal article-refereed


  • active power harmonic filter
  • electrostatic devices
  • hysteresis
  • op-amp
  • power electronics


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