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Stability Analysis and Stability Enhancement Based on Virtual Harmonic Resistance for Meshed DC Distributed Power Systems with Constant Power Loads

Author

Listed:
  • Huiyong Hu

    (College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

  • Xiaoming Wang

    (College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

  • Yonggang Peng

    (College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

  • Yanghong Xia

    (College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

  • Miao Yu

    (College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

  • Wei Wei

    (College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

Abstract

This paper addresses the stability issue of the meshed DC distributed power systems (DPS) with constant power loads (CPLs) and proposes a stability enhancement method based on virtual harmonic resistance. In previous researches, the network dynamics of the meshed DC DPS are often ignored, which affects the derivation of the equivalent system impendence. In addition, few of them have considered the meshed DC DPS including multiple sources with voltage-controlled converters and CPLs. To tackle the aforementioned challenge, this paper mainly makes the following efforts. The component connection method (CCM) is employed and expanded to derive the stability criterion of the meshed DC DPS with CPLs. This stability criterion can be simplified to relate only with the network node admittance matrix, the output impendences of the sources, and the input admittances of the CPLs. A virtual harmonic resistance through the second-order generalized integrator (SOGI) is added in the source with the voltage-controlled converter to lower the peak of the source output impendence, which can enhance the stability of the meshed DC DPS. The effectiveness of the proposed stability criterion and stability enhancement method are verified by nonlinear dynamic simulations.

Suggested Citation

  • Huiyong Hu & Xiaoming Wang & Yonggang Peng & Yanghong Xia & Miao Yu & Wei Wei, 2017. "Stability Analysis and Stability Enhancement Based on Virtual Harmonic Resistance for Meshed DC Distributed Power Systems with Constant Power Loads," Energies, MDPI, vol. 10(1), pages 1-15, January.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:1:p:69-:d:87216
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    References listed on IDEAS

    as
    1. Seung-Woon Lee & Bo-Hyung Cho, 2016. "Master–Slave Based Hierarchical Control for a Small Power DC-Distributed Microgrid System with a Storage Device," Energies, MDPI, vol. 9(11), pages 1-14, October.
    2. Yigeng Huangfu & Shengzhao Pang & Babak Nahid-Mobarakeh & Akshay Rathore & Fei Gao & Dongdong Zhao, 2016. "Analysis and Design of an Active Stabilizer for a Boost Power Converter System," Energies, MDPI, vol. 9(11), pages 1-15, November.
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    Cited by:

    1. Libor Dražan & René Križan & Miroslav Popela, 2021. "Design and Testing of a Low-Tech DEW Generator for Determining Electromagnetic Immunity of Standard Electronic Circuits," Energies, MDPI, vol. 14(11), pages 1-15, May.
    2. Mohammed Kh. AL-Nussairi & Ramazan Bayindir & Sanjeevikumar Padmanaban & Lucian Mihet-Popa & Pierluigi Siano, 2017. "Constant Power Loads (CPL) with Microgrids: Problem Definition, Stability Analysis and Compensation Techniques," Energies, MDPI, vol. 10(10), pages 1-20, October.

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