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Stochastic Analysis-Based Volt–Var Curve of Smart Inverters for Combined Voltage Regulation in Distribution Networks

Author

Listed:
  • Dongwon Lee

    (School of Electrical Engineering, Korea University, Anam-ro, Sungbuk-gu, Seoul 02841, Korea)

  • Changhee Han

    (School of Electrical Engineering, Korea University, Anam-ro, Sungbuk-gu, Seoul 02841, Korea)

  • Gilsoo Jang

    (School of Electrical Engineering, Korea University, Anam-ro, Sungbuk-gu, Seoul 02841, Korea)

Abstract

The proliferation of renewable energy resources (RES), especially solar photovoltaic (PV) generation resources, causes overvoltage and line overloading in distribution networks. This study proposes a two-level volt–var control method based on multiple timescales. The on-load tap changer (OLTC) operates on an hourly timescale, to regulate the voltage on the secondary winding. In the 15-minutes timescale, PV-connected smart inverters and static var compensators (SVCs) are obliged to compensate the reactive power for the voltage control at the point of common coupling. In the multi-timescale voltage control framework, this study proposes a new multi-sectional volt–var curve (MSVVC) of a PV inverter. The objective of the MSVVC is to minimize the energy loss in the network, improve the voltage profile, and obtain the operational margin of other reactive power compensation devices. In the process of determining the optimal parameters of the MSVVC, stochastic modeling-based load flow analysis is utilized to consider the intermittency and uncertainty of RES generation. The effectiveness of the proposed method is verified on the IEEE 33-bus system in comparison with the conventional volt–var curve cases.

Suggested Citation

  • Dongwon Lee & Changhee Han & Gilsoo Jang, 2021. "Stochastic Analysis-Based Volt–Var Curve of Smart Inverters for Combined Voltage Regulation in Distribution Networks," Energies, MDPI, vol. 14(10), pages 1-15, May.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:10:p:2785-:d:553367
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    References listed on IDEAS

    as
    1. Sang-Yun Yun & Joon-Ho Choi, 2014. "Development and Field Test of a Real-Time Database in the Korean Smart Distribution Management System," Energies, MDPI, vol. 7(4), pages 1-24, March.
    2. Sang-Yun Yun & Pyeong-Ik Hwang & Seung-Il Moon & Seong-Chul Kwon & Il-Keun Song & Joon-Ho Choi, 2014. "Development and Field Test of Voltage VAR Optimization in the Korean Smart Distribution Management System," Energies, MDPI, vol. 7(2), pages 1-27, February.
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    Cited by:

    1. Zheng Liu & Maryam Majidi & Haonan Wang & Denis Mende & Martin Braun, 2023. "Time Series Optimization-Based Characteristic Curve Calculation for Local Reactive Power Control Using Pandapower - PowerModels Interface," Energies, MDPI, vol. 16(11), pages 1-24, May.
    2. Izzah Afandi & Ashish P. Agalgaonkar & Sarath Perera, 2022. "Integrated Volt/Var Control Method for Voltage Regulation and Voltage Unbalance Reduction in Active Distribution Networks," Energies, MDPI, vol. 15(6), pages 1-21, March.
    3. Anju Yadav & Nand Kishor & Richa Negi, 2023. "Bus Voltage Violations under Different Solar Radiation Profiles and Load Changes with Optimally Placed and Sized PV Systems," Energies, MDPI, vol. 16(2), pages 1-23, January.

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