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Voltage Estimation Method for Power Distribution Networks Using High-Precision Measurements

Author

Listed:
  • Chan-Hyeok Oh

    (Department of Electrical Engineering in Chonnam National University, Gwangju 61186, Korea)

  • Seok-Il Go

    (Department of Electrical Engineering in Chonnam National University, Gwangju 61186, Korea)

  • Joon-Ho Choi

    (Department of Electrical Engineering in Chonnam National University, Gwangju 61186, Korea)

  • Seon-Ju Ahn

    (Department of Electrical Engineering in Chonnam National University, Gwangju 61186, Korea)

  • Sang-Yun Yun

    (Department of Electrical Engineering in Chonnam National University, Gwangju 61186, Korea)

Abstract

In this study, we propose a voltage estimation method for the radial distribution network with distributed generators (DGs) using high-precision measurements (HPMs). The proposed method uses the section loads center for voltage estimation because individual loads are not measured in the distribution system. The bus voltage was estimated through correction of the section load center by using an HPM at the end of the main feeder. The correction parameter of the section load center was calculated by comparing the initial voltage estimates and the measurements of the HPMs. After that, the voltage of the main feeder was re-estimated. Finally, the bus voltage in the lateral feeder was estimated based on the voltage estimates in the main feeder and the current measurements in the lateral feeder. The accuracy of the proposed algorithm was verified through case studies by using test systems implemented in MATLAB, Simulink, and Python environments. In order to verify the utilization of the proposed method to the practical system, a test with injection of approximately 5% of normally distributed random noise was performed. Through the results of the case studies, when an HPM is installed at the end of the main feeder, it demonstrated that the voltage estimation accuracy can be greatly improved by the proposed method. Compared with the existing methods, the proposed method was less affected by PV and showed robustness to measurement noise.

Suggested Citation

  • Chan-Hyeok Oh & Seok-Il Go & Joon-Ho Choi & Seon-Ju Ahn & Sang-Yun Yun, 2020. "Voltage Estimation Method for Power Distribution Networks Using High-Precision Measurements," Energies, MDPI, vol. 13(9), pages 1-23, May.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:9:p:2385-:d:356223
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    References listed on IDEAS

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    1. McDonald, Jim, 2008. "Adaptive intelligent power systems: Active distribution networks," Energy Policy, Elsevier, vol. 36(12), pages 4346-4351, December.
    2. Sang-Yun Yun & Chul-Min Chu & Seong-Chul Kwon & Il-Keun Song & Joon-Ho Choi, 2014. "The Development and Empirical Evaluation of the Korean Smart Distribution Management System," Energies, MDPI, vol. 7(3), pages 1-31, March.
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    Cited by:

    1. Piotr Kacejko & Paweł Pijarski, 2021. "Optimal Voltage Control in MV Network with Distributed Generation," Energies, MDPI, vol. 14(2), pages 1-19, January.

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