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Impedance-Based Stability Analysis in Grid Interconnection Impact Study Owing to the Increased Adoption of Converter-Interfaced Generators

Author

Listed:
  • Youngho Cho

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

  • Kyeon Hur

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

  • Yong Cheol Kang

    (Department of Electrical Engineering, Chonbuk National University, Jeonju 54896, Korea)

  • Eduard Muljadi

    (National Renewable Energy Laboratory, Golden, CO 80401, USA)

Abstract

This study investigates the emerging harmonic stability concerns to be addressed by grid planners in generation interconnection studies, owing to the increased adoption of renewable energy resources connected to the grid via power electronic converters. The wideband and high-frequency electromagnetic transient (EMT) characteristics of these converter-interfaced generators (CIGs) and their interaction with the grid impedance are not accurately captured in the typical dynamic studies conducted by grid planners. This paper thus identifies the desired components to be studied and subsequently develops a practical process for integrating a new CIG into a grid with the existing CIGs. The steps of this process are as follows: the impedance equation of a CIG using its control dynamics and an interface filter to the grid, for example, an LCL filter (inductor-capacitor-inductor type), is developed; an equivalent impedance model including the existing CIGs nearby and the grid observed from the point of common coupling are derived; the system stability for credible operating scenarios is assessed. Detailed EMT simulations validate the accuracy of the impedance models and stability assessment for various connection scenarios. By complementing the conventional EMT simulation studies, the proposed analytical approach enables grid planners to identify critical design parameters for seamlessly integrating a new CIG and ensuring the reliability of the grid.

Suggested Citation

  • Youngho Cho & Kyeon Hur & Yong Cheol Kang & Eduard Muljadi, 2017. "Impedance-Based Stability Analysis in Grid Interconnection Impact Study Owing to the Increased Adoption of Converter-Interfaced Generators," Energies, MDPI, vol. 10(9), pages 1-17, September.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:9:p:1355-:d:111313
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    References listed on IDEAS

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    1. Youngho Cho & Choongman Lee & Kyeon Hur & Yong Cheol Kang & Eduard Muljadi & Sang-Ho Park & Young-Do Choy & Gi-Gab Yoon, 2016. "A Framework to Analyze the Stochastic Harmonics and Resonance of Wind Energy Grid Interconnection," Energies, MDPI, vol. 9(9), pages 1-16, August.
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    Citations

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    Cited by:

    1. Xing Li & Hua Lin, 2018. "Stability Analysis of Grid-Connected Converters with Different Implementations of Adaptive PR Controllers under Weak Grid Conditions," Energies, MDPI, vol. 11(8), pages 1-17, August.
    2. Wu Cao & Kangli Liu & Shunyu Wang & Haotian Kang & Dongchen Fan & Jianfeng Zhao, 2019. "Harmonic Stability Analysis for Multi-Parallel Inverter-Based Grid-Connected Renewable Power System Using Global Admittance," Energies, MDPI, vol. 12(14), pages 1-16, July.
    3. Xiang Wang & Zhengyou He & Jianwei Yang, 2018. "Electric Vehicle Fast-Charging Station Unified Modeling and Stability Analysis in the dq Frame," Energies, MDPI, vol. 11(5), pages 1-24, May.
    4. Shahbaz Khan & Xiaobin Zhang & Bakht Muhammad Khan & Husan Ali & Haider Zaman & Muhammad Saad, 2018. "AC and DC Impedance Extraction for 3-Phase and 9-Phase Diode Rectifiers Utilizing Improved Average Mathematical Models," Energies, MDPI, vol. 11(3), pages 1-19, March.
    5. Adedotun J. Agbemuko & José Luis Domínguez-García & Eduardo Prieto-Araujo & Oriol Gomis-Bellmunt, 2018. "Impedance Modelling and Parametric Sensitivity of a VSC-HVDC System: New Insights on Resonances and Interactions," Energies, MDPI, vol. 11(4), pages 1-24, April.
    6. Teuvo Suntio & Tuomas Messo & Matias Berg & Henrik Alenius & Tommi Reinikka & Roni Luhtala & Kai Zenger, 2019. "Impedance-Based Interactions in Grid-Tied Three-Phase Inverters in Renewable Energy Applications," Energies, MDPI, vol. 12(3), pages 1-31, January.
    7. Ishita Ray, 2021. "Review of Impedance-Based Analysis Methods Applied to Grid-Forming Inverters in Inverter-Dominated Grids," Energies, MDPI, vol. 14(9), pages 1-18, May.

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