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Inertial and Damping Characteristics of DC Distributed Power Systems Based on Frequency Droop Control

Author

Listed:
  • Liancheng Xiu

    (College of Mechanical and Electrical Engineering, Sichuan Agricultural University, Yaan 625014, China)

  • Liansong Xiong

    (School of Automation, Nanjing Institute of Technology, Nanjing 211167, China
    Department of Electrical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
    Guangdong Key Laboratory of Clean Energy Technology, South China University of Technology, Guangzhou 510640, China)

  • Ping Yang

    (Guangdong Key Laboratory of Clean Energy Technology, South China University of Technology, Guangzhou 510640, China)

  • Zhiliang Kang

    (College of Mechanical and Electrical Engineering, Sichuan Agricultural University, Yaan 625014, China)

Abstract

With high penetration of renewable energy, DC distributed power systems (DDPSs) need to improve the inertia response and damping capacity of the power grid. The effects of main circuit parameters and control factors on the inertia, damping and synchronization of the DDPS were studied in this paper. Firstly, the dynamic model of DDPSs based on frequency droop control is established in the DC voltage control (DVC) timescale. Then, a static synchronous generator (SSG) model is used to analyze the parameters that affect the inertial level, damping effect and synchronization capability of the DDPS. The analysis results show that an optimal design of the frequency droop coefficient and proportional integral (PI) parameters of the DC bus voltage control loop can equivalently change the characteristics of inertia and damping when the frequency droop control strategy is applied to the DC/DC converter and the DC bus voltage control strategy is used in the grid-tied inverter. Simulation results verify the correctness of the conclusions. This paper helps to design an effective control strategy for DDPSs to enhance the inertial level and damping effect of the power grid and to improve the stable operation capability of renewable energy systems.

Suggested Citation

  • Liancheng Xiu & Liansong Xiong & Ping Yang & Zhiliang Kang, 2018. "Inertial and Damping Characteristics of DC Distributed Power Systems Based on Frequency Droop Control," Energies, MDPI, vol. 11(9), pages 1-14, September.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:9:p:2418-:d:169409
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    References listed on IDEAS

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    1. Liansong Xiong & Yujun Li & Yixin Zhu & Ping Yang & Zhirong Xu, 2018. "Coordinated Control Schemes of Super-Capacitor and Kinetic Energy of DFIG for System Frequency Support," Energies, MDPI, vol. 11(1), pages 1-16, January.
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    Cited by:

    1. Donghui Zhang & Yongbin Wu & Liansong Xiong & Chengyong Zhao, 2019. "Analysis of Inertia Characteristics of Direct-Drive Permanent-Magnet Synchronous Generator in Micro-Grid," Energies, MDPI, vol. 12(16), pages 1-17, August.
    2. Yongbin Wu & Donghui Zhang & Liansong Xiong & Sue Wang & Zhao Xu & Yi Zhang, 2019. "Modeling and Mechanism Investigation of Inertia and Damping Issues for Grid-Tied PV Generation Systems with Droop Control," Energies, MDPI, vol. 12(10), pages 1-17, May.

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