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Distributed Optimal Control of Energy Storages in a DC Microgrid With Communication Delay

机译：具有通信延迟的DC微电网中能量储存的分布式最优控制

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摘要

For a distributed DC microgrid, the conventional voltage control highly relies on the accuracy of the voltage observer, and the observer will produce an estimation error under time delays. To address the problem brought by the voltage observer, this paper transforms the voltage control into an optimization problem and integrates it into the power sharing control based on the PI consensus algorithm. With the proposed optimal control, the DC bus voltage control and proportional power sharing of the energy storages can be realized in one controller, so that the controller structure is dramatically simplified and the control accuracy will not be affected by the time delay. In addition, to further improve the system stability to resist delay, scattering transformation is introduced in the distributed optimal controller. By constructing Lyapunov function, it has been proved that the stability of the controller under the time delay can be guaranteed. Simulations are conducted to verify the effectiveness of the proposed control strategy and the transformation with and without time delay.
机译：对于分布式DC MicroGrid，传统的电压控制高度依赖于电压观测器的精度，并且观察者将在延迟时产生估计误差。为了解决电压观测器所带来的问题，本文将电压控制转换为优化问题，并将其集成到基于PI共识算法的电力共享控制中。利用所提出的最优控制，可以在一个控制器中实现DC总线电压控制和比例功率共享，从而大大简化了控制器结构，并且控制精度不会受到时滞的影响。另外，为了进一步提高系统稳定性来抵抗延迟，在分布式最佳控制器中引入散射变换。通过构建Lyapunov函数，已经证明可以保证控制器在时间延迟下的控制器的稳定性。进行仿真以验证所提出的控制策略的有效性和随着时间延迟的情况下的变换。

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  • 来源
    《Smart Grid, IEEE Transactions on》 |2020年第3期|2033-2042|共10页
  • 作者

    Shi Mengxuan; Chen Xia; Zhou Jianyu; Chen Yin; Wen Jinyu; He Haibo;

  • 作者单位

    Huazhong Univ Sci & Technol State Key Lab Adv Electromagnet Engn & Technol Wuhan 430074 Peoples R China|Huazhong Univ Sci & Technol Sch Elect & Elect Engn Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol State Key Lab Adv Electromagnet Engn & Technol Wuhan 430074 Peoples R China|Huazhong Univ Sci & Technol Sch Elect & Elect Engn Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol State Key Lab Adv Electromagnet Engn & Technol Wuhan 430074 Peoples R China|Huazhong Univ Sci & Technol Sch Elect & Elect Engn Wuhan 430074 Peoples R China;

    Univ Strathclyde Dept Elect & Elect Engn Glasgow G1 1XW Lanark Scotland;

    Huazhong Univ Sci & Technol State Key Lab Adv Electromagnet Engn & Technol Wuhan 430074 Peoples R China|Huazhong Univ Sci & Technol Sch Elect & Elect Engn Wuhan 430074 Peoples R China;

    Univ Rhode Isl Dept Elect Biomed & Comp Engn Kingston RI 02881 USA;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Voltage control; Observers; Delay effects; Consensus algorithm; Microgrids; Optimal control; Delays; DC microgrid; energy storage; scattering transformation; distributed optimal control; PI consensus algorithm;

    机译：电压控制;观察者;延迟效应;共识算法;微电网;最优控制;延迟;直流微电网;能量存储;散射变换;分布式最佳控制;PI共识算法;PI共识算法;PI共识算法;PI共识算法;PI共识算法;PI共识算法;PI共识算法;

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