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An Inertia and Damping Control Method of DC–DC Converter in DC Microgrids

机译：DC微电网中DC-DC转换器的惯性和阻尼控制方法

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摘要

In DC microgrids, the inherent inertia from DC capacitors is low and the DC bus voltage is susceptible to power fluctuations, which results in low DC voltage quality. In this article, an inertia and damping control (IDC) method is proposed and applied in the energy storage system to strengthen the inertia and damping of DC microgrids. The proposed control strategy is obtained based on the charging and discharging conversion form of capacitors and aims to control the external characteristics of converters in DC microgrids to improve its inertia and damping feature. The small signal model of the proposed control strategy is built to identify the stability and dynamic characteristic. In order to eliminate the abrupt change in the beginning of the voltage dynamic characteristic, a feedforward control is implemented and the dynamic characteristic is revised. Then by analyzing system stability, the range of virtual inertia control coefficient and damping control coefficient are determined. Finally, hardware- in-the-loop (HIL) simulation based on RT-LAB is carried out to verify the validity of the above theoretical analysis and control strategy. In this simulation, the proposed control strategy is implemented in the energy storage system, which provides inertia support to smooth the DC voltage under power fluctuations.
机译：在DC微电网中，来自DC电容器的固有惯性低，直流母线电压易受电力波动的影响，这导致低直流电压质量。在本文中，提出了一种惯性和阻尼控制（IDC）方法，并应用于能量存储系统中，以增强DC微普林的惯性和阻尼。基于电容器的充电和放电转换形式获得所提出的控制策略，并旨在控制DC微电网中转换器的外部特性，以改善其惯性和阻尼特征。建立了拟议控制策略的小信号模型以识别稳定性和动态特性。为了消除电压动态特性开始的突变变化，实现了前馈控制，并修改了动态特性。然后通过分析系统稳定性，确定虚拟惯性控制系数和阻尼控制系数的范围。最后，对基于RT-Lab的硬件（HIL）仿真进行了验证了上述理论分析和控制策略的有效性。在该模拟中，所提出的控制策略在能量存储系统中实现，其提供惯性支持以平滑功率波动下的DC电压。

著录项

  • 来源
    《IEEE Transactions on Energy Conversion》 |2020年第2期|799-807|共9页
  • 作者

    Zhu Xiaorong; Meng Fanqi; Xie Zhiyun; Yue Ying;

  • 作者单位

    North China Elect Power Univ State Key Lab Alternate Elect Power Syst Renewabl Baoding 071003 Peoples R China;

    North China Elect Power Univ State Key Lab Alternate Elect Power Syst Renewabl Baoding 071003 Peoples R China;

    State Grid Zhejiang Elect Power Ltd Wenzhou Power Supply Co Wenzhou 325000 Peoples R China;

    North China Elect Power Univ Dept Mech Engn Baoding 071003 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    DC microgrids; virtual inertia control; energy storage system; small-signal model;

    机译：DC Microgrids;虚拟惯性控制;能量存储系统;小信号模型;

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