A NOVEL GRID CURRENT COMPENSATOR FOR GRID-CONNECTED DISTRIBUTED GENERATION UNDER NONLINEAR LOADS WITH FUZZY LOGIC CONTOLLER

  • Unique Paper ID: 147350
  • Volume: 5
  • Issue: 7
  • PageNo: 192-202
  • Abstract:
  • This paper introduces an advanced current control strategy for grid-connected operations of distributed generation (DG), which supports the DG to transfer a sinusoidal current into the utility grid despite the distorted grid voltage and nonlinear local load conditions. The proposed fuzzy logic controller based current controller is designed in the synchronous reference frame and compared with conventional PI controller and with combination of a proportional–integral (PI) controller and a repetitive controller (RC). An RC serves as a bank of resonant controllers, which can compensate a large number of harmonic components with a simple delay function. Hence, the control strategy can be greatly simplified. In addition, the proposed control method does not require the local load current measurement or harmonic analysis of the grid voltage. Therefore, the proposed control method can be easily adopted into the traditional DG control system without installation of extra hardware. Despite the reduced number of sensors, the grid current quality is significantly improved compared with the traditional methods with the PI controller and PI-RC controller. The operation principle of the proposed control method is analyzed in detail, and its effectiveness is validated through simulation results.

Copyright & License

Copyright © 2025 Authors retain the copyright of this article. This article is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

BibTeX

@article{147350,
        author = {BONTHA DEEPTHI and K.VEERAJANEYULU},
        title = {A NOVEL GRID CURRENT COMPENSATOR FOR GRID-CONNECTED DISTRIBUTED GENERATION UNDER NONLINEAR LOADS WITH FUZZY LOGIC CONTOLLER},
        journal = {International Journal of Innovative Research in Technology},
        year = {},
        volume = {5},
        number = {7},
        pages = {192-202},
        issn = {2349-6002},
        url = {https://ijirt.org/article?manuscript=147350},
        abstract = {This paper introduces an advanced current control strategy for grid-connected operations of distributed generation (DG), which supports the DG to transfer a sinusoidal current into the utility grid despite the distorted grid voltage and nonlinear local load conditions. The proposed fuzzy logic controller based current controller is designed in the synchronous reference frame and compared with conventional PI controller and with   combination of a proportional–integral (PI) controller and a repetitive controller (RC). An RC serves as a bank of resonant controllers, which can compensate a large number of harmonic components with a simple delay function. Hence, the control strategy can be greatly simplified. In addition, the proposed control method does not require the local load current measurement or harmonic analysis of the grid voltage. 	Therefore, the proposed control method can be easily adopted into the traditional DG control system without installation of extra hardware. Despite the reduced number of sensors, the grid current quality is significantly improved compared with the traditional methods with the PI controller and PI-RC controller. The operation principle of the proposed control method is analyzed in detail, and its effectiveness is validated through simulation results.},
        keywords = {Distributed generation (DG), grid-connected inverter, harmonic compensation, nonlinear load, repetitive control performance. },
        month = {},
        }

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