An enhanced adaptive filter for orthogonal signal generation in a single-phase DQ current controller

Seyedfoad Taghizadeh, Wayne Water, M. J. Hossain, Fida Hasan Md Raf, Junwei Lu

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review


The development of a suitable and feasible direct- quadrature (DQ) transformation theory for a single-phase current controller has always been a challenge for designers, as an additional orthogonal signal generation (OSG) block is required to generate the orthogonal component of the grid current. Several methods have been investigated in the literature that mostly exhibit poor steady-state and dynamic performance. This paper proposes a new method, which uses an enhanced-adaptive-filter algorithm and can address the limitations of existing methods. The proposed technique operates without any delay and demonstrates improved steady- state and dynamic performance. It can reduce the harmonics of the input signal as it generates orthogonal component of the grid current. Its robustness, fast response and particularly its simplicity make the proposed algorithm well-suited to working as an OSG block in the control system of a power electronic appliance (e.g., static synchronous compensator, active power filter, and unified power flow controller). The performance of the proposed algorithm is verified in a single-phase grid- connected voltage-source converter application. Stability analysis, simulation and experimental results verify the efficacy, reliability and contribution of the proposed method.

Original languageEnglish
Title of host publication2018 IEEE 7th International Conference on Power and Energy (PECon)
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages6
ISBN (Electronic)9781538654316, 9781538654309
ISBN (Print)9781538654323
Publication statusPublished - 2018
Event2018 IEEE International Conference on Power and Energy - Kuala Lumpur, Malaysia
Duration: 3 Dec 20184 Dec 2018


Conference2018 IEEE International Conference on Power and Energy
Abbreviated titlePECon2018
CityKuala Lumpur


  • Adaptive filter
  • orthogonal signal generation (OSG)
  • DQ frame
  • current control
  • single-phase grid-connected inverter

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