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Appropriate Volt–Var Curve Settings for PV Inverters Based on Distribution Network Characteristics Using Match Rate of Operating Point

Author

Listed:
  • Daisuke Iioka

    (Department of Electrical and Electronic Engineering, College of Engineering, Chubu University, Kasugai 487-8501, Japan)

  • Kenichi Kusano

    (Department of Electrical Engineering, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan)

  • Takahiro Matsuura

    (Tokyo Electric Power Company Holdings, Inc., 4-1, Egasaki-cho, Tsurumi-ku, Yokohama 230-8510, Japan)

  • Hiromu Hamada

    (Tokyo Electric Power Company Holdings, Inc., 4-1, Egasaki-cho, Tsurumi-ku, Yokohama 230-8510, Japan)

  • Teru Miyazaki

    (Tokyo Electric Power Company Holdings, Inc., 4-1, Egasaki-cho, Tsurumi-ku, Yokohama 230-8510, Japan)

Abstract

This paper describes the process of setting up an appropriate volt–var curve for the reactive power control of a photovoltaic (PV) inverter interconnected to a distribution line that is voltage controlled by a load ratio control transformer (LRT). Computer simulations with 360 patterns of volt–var curves applied to five actual distribution line models are presented. The number of patterns was narrowed down to 23 by using voltage, distribution-line loss, number of LRT tap operations, and a new evaluation index, the match ratio. When a power-factor constraint is imposed on the PV inverter, it may not output the reactive power according to the volt–var curve depending on the active power output. The match rate is an index to show the percentage of the operating points of the PV inverter that conform with the volt–var curve. By evaluating the match rate, it can be demonstrated if the PV inverter efficiently contributes to the voltage control, which greatly contributes to narrowing of the volt–var curve. It is demonstrated that the volt–var curve obtained using the proposed method is superior in terms of voltage controllability, distribution line losses, and the number of LRT tap controls.

Suggested Citation

  • Daisuke Iioka & Kenichi Kusano & Takahiro Matsuura & Hiromu Hamada & Teru Miyazaki, 2022. "Appropriate Volt–Var Curve Settings for PV Inverters Based on Distribution Network Characteristics Using Match Rate of Operating Point," Energies, MDPI, vol. 15(4), pages 1-19, February.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:4:p:1375-:d:749032
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    References listed on IDEAS

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    1. Daisuke Iioka & Takahiro Fujii & Toshio Tanaka & Tsuyoshi Harimoto & Junpei Motoyama, 2020. "Voltage Reduction in Medium Voltage Distribution Systems Using Constant Power Factor Control of PV PCS," Energies, MDPI, vol. 13(20), pages 1-17, October.
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    Cited by:

    1. Yu Fujimoto & Akihisa Kaneko & Yutaka Iino & Hideo Ishii & Yasuhiro Hayashi, 2023. "Challenges in Smartizing Operational Management of Functionally-Smart Inverters for Distributed Energy Resources: A Review on Machine Learning Aspects," Energies, MDPI, vol. 16(3), pages 1-26, January.
    2. Kwang-Hoon Yoon & Joong-Woo Shin & Tea-Yang Nam & Jae-Chul Kim & Won-Sik Moon, 2022. "Operation Method of On-Load Tap Changer on Main Transformer Considering Reverse Power Flow in Distribution System Connected with High Penetration on Photovoltaic System," Energies, MDPI, vol. 15(17), pages 1-17, September.

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