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An Implementation of Improved PLL for Control of Grid-Connected Converters Under Grid Perturbations

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Abstract

In this article, a new method is proposed for calculating electric angle using a phase-locked loop (PLL) to perform these calculations correctly under disturbance conditions of the grid voltage. This work is based on using the decoupled double synchronous reference frame PLL (DDSRF-PLL), and this kind of PLL has been expanded to solve its problems in the presence of harmonics and high disturbance in the input voltage. In the DDSRF-PLL, only components with a frequency of double the fundamental frequency will be deleted, but in the expanded PLL all the harmonics will be eliminated. The effect of this method was tested using both simulation and practical experimentation. The simulation of this method was performed in MATLAB software. It has been shown that this method is robust, precise and fast for calculating the electric angle under grid voltage perturbations. Subsequently, the developed PLL was implemented in a FPGA-based experimental setup and its function was studied.

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Notes

  1. Synchronous Reference Frame.

  2. Decoupled Double Synchronous Reference Frame.

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Acknowledgements

This research was supported by MAPNA Electric and Control, Engineering and Manufacturing Co. (MECO). We thank our colleagues from MECO Power Electronic Center who provided insight and expertise that greatly assisted the research, although they may not agree with all of the conclusions of this paper.

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Authors and Affiliations

  1. Faculty of Electrical and Computer Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran

    Ali Ghasemi, Mohammad Hossein Refan & Parviz Amiri

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  1. Ali Ghasemi
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  2. Mohammad Hossein Refan
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  3. Parviz Amiri
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Correspondence to Mohammad Hossein Refan.

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Ghasemi, A., Refan, M.H. & Amiri, P. An Implementation of Improved PLL for Control of Grid-Connected Converters Under Grid Perturbations. J Control Autom Electr Syst 30, 568–579 (2019). https://doi.org/10.1007/s40313-019-00470-1

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  • DOI: https://doi.org/10.1007/s40313-019-00470-1

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