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Reactive Power Management Based on Voltage Sensitivity Analysis of Distribution System with High Penetration of Renewable Energies

Author

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  • SeokJu Kang

    (School of Electrical & Electronic Engineering, Yonsei University, Seoul 03722, Korea)

  • Jaewoo Kim

    (School of Electrical & Electronic Engineering, Yonsei University, Seoul 03722, Korea)

  • Jung-Wook Park

    (School of Electrical & Electronic Engineering, Yonsei University, Seoul 03722, Korea)

  • Seung-Mook Baek

    (Division of Electrical, Electronic & Control Engineering, Kongju National University, Cheonan 31080, Korea)

Abstract

The high penetration of distributed energy resources (DERs) in the distribution system brings new challenges related to voltage variations and reverse power flow. The sudden changes in electric power generation from the DERs due to climate conditions or their internal malfunction might cause high fluctuations in system voltage. To enhance the voltage stability when a disturbance occurs, this paper proposes a new reactive power management method to control each DER based on voltage sensitivity analysis. The voltage variation has the different features in both steady-state and transient conditions. In particular, its transient behavior depends on the type of DERs. Therefore, the particular optimal control for improving the dynamic response of voltage is difficult to apply for all types of DERs. In contrast, the voltage variation in steady-state can be controlled with the reactive power management by the sensitivity analysis between reactive power generation and system voltage. Even though this paper focuses on the reduction of voltage variation in steady-state, the relationship between the voltage variations in steady-state and transient conditions is also analyzed. The effectiveness of the proposed method is verified with several case studies on the practical distribution system in South Korea by using the time-domain simulation based on the PSCAD/EMTDC ® software. The results show that the proposed reactive power management method can improve the dynamic voltage responses in both steady-state and transient conditions when the distribution system has the high penetration of renewables.

Suggested Citation

  • SeokJu Kang & Jaewoo Kim & Jung-Wook Park & Seung-Mook Baek, 2019. "Reactive Power Management Based on Voltage Sensitivity Analysis of Distribution System with High Penetration of Renewable Energies," Energies, MDPI, vol. 12(8), pages 1-20, April.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:8:p:1493-:d:224477
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    References listed on IDEAS

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    1. Yun-Su Kim & Gyeong-Hun Kim & Jae-Duck Lee & Changhee Cho, 2016. "New Requirements of the Voltage/VAR Function for Smart Inverter in Distributed Generation Control," Energies, MDPI, vol. 9(11), pages 1-14, November.
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    Cited by:

    1. Soo-Bin Kim & Seung-Ho Song, 2020. "A Hybrid Reactive Power Control Method of Distributed Generation to Mitigate Voltage Rise in Low-Voltage Grid," Energies, MDPI, vol. 13(8), pages 1-15, April.
    2. Diego Larrahondo & Ricardo Moreno & Harold R. Chamorro & Francisco Gonzalez-Longatt, 2021. "Comparative Performance of Multi-Period ACOPF and Multi-Period DCOPF under High Integration of Wind Power," Energies, MDPI, vol. 14(15), pages 1-15, July.
    3. Tiago Abreu & Tiago Soares & Leonel Carvalho & Hugo Morais & Tiago Simão & Miguel Louro, 2019. "Reactive Power Management Considering Stochastic Optimization under the Portuguese Reactive Power Policy Applied to DER in Distribution Networks," Energies, MDPI, vol. 12(21), pages 1-15, October.
    4. Martha N. Acosta & Francisco Gonzalez-Longatt & Danijel Topić & Manuel A. Andrade, 2021. "Optimal Microgrid–Interactive Reactive Power Management for Day–Ahead Operation," Energies, MDPI, vol. 14(5), pages 1-20, February.
    5. Gustavo Adolfo Gómez-Ramírez & Carlos Meza & Gonzalo Mora-Jiménez & José Rodrigo Rojas Morales & Luis García-Santander, 2023. "The Central American Power System: Achievements, Challenges, and Opportunities for a Green Transition," Energies, MDPI, vol. 16(11), pages 1-20, May.

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