Applying a Control Strategy Consisting of TCCF in Four-Leg Shunt Active Filter in Order to Improve Power Quality

Mojtaba Mostafapour*, Alireza Jalilian*, Mehdi Savaghebi*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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In this paper, a control scheme is proposed to compensate nonlinear and unbalanced loads currents and mitigate neutral current in a weak distribution network utilizing a four-leg converter. Two separate Complex Coefficient-Filters (CCF) have been used to extract the fundamental frequency positive sequence component of the load current and the converter to compensate for and control the dc- link voltage. Also, due to the presence of unbalance and harmonics the voltage of the weak grid, a CCF-based Phase Locked Loop (PLL) has been used for proper synchronization with grid voltage. Owing to absence of a low-pass filter in the CCF structure does not reduce the system dynamics and increases the speed and accuracy of estimation of the frequency and phase angle of the grid voltage. The Triple-CCF (TCCF) control strategy proposed in this article is compared with the same case, Triple-Reduced Order Generalized Integrator (TROGI). Simulation results show the performance and efficiency of the four-leg active filter control strategy based on TCCF.
Original languageEnglish
Title of host publicationProceedings of 2022 12th Smart Grid Conference (SGC)
Number of pages5
Publication date2023
ISBN (Electronic)979-8-3503-3396-1
Publication statusPublished - 2023
Event2022 12th Smart Grid Conference - Kerman, Iran, Islamic Republic of
Duration: 13 Dec 202215 Dec 2022


Conference2022 12th Smart Grid Conference
Country/TerritoryIran, Islamic Republic of


  • Triple-complex coefficient filters
  • Four-leg converter
  • Active power filter
  • Power quality


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