Research on Control Strategy of Bidirectional Buck-Boost Converter in DC Microgrid Based on Active Disturbance Rejection Control

Xin LU; Zhongli CHEN; Hui LI

doi:10.12096/j.2096-4528.pgt.20123

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Research on Control Strategy of Bidirectional Buck-Boost Converter in DC Microgrid Based on Active Disturbance Rejection Control

Energy Internet | 更新时间：2025-07-04

- Research on Control Strategy of Bidirectional Buck-Boost Converter in DC Microgrid Based on Active Disturbance Rejection Control
- Power Generation Technology Vol. 42, Issue 2, Pages: 193-200(2021)
- 作者机构：
  
  1.上海电力大学自动化工程学院, 上海市杨浦区 200090
  2.上海建筑设计研究院有限公司, 上海市静安区 200041
- 作者简介：
- 基金信息：
  
  Shanghai Civil Military Integration Development Project(2019-jmrh1-kj40)
- DOI：10.12096/j.2096-4528.pgt.20123
  CLC： TK01;TM46
- Received：21 December 2020，
  
  Published：30 April 2021
- 稿件说明：
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Xin LU, Zhongli CHEN, Hui LI. Research on Control Strategy of Bidirectional Buck-Boost Converter in DC Microgrid Based on Active Disturbance Rejection Control[J]. Power Generation Technology, 2021, 42(2): 193-200.
DOI：

Xin LU, Zhongli CHEN, Hui LI. Research on Control Strategy of Bidirectional Buck-Boost Converter in DC Microgrid Based on Active Disturbance Rejection Control[J]. Power Generation Technology, 2021, 42(2): 193-200. DOI： 10.12096/j.2096-4528.pgt.20123.

摘要

为了降低直流微电网母线电压的波动，提出基于自抗扰控制的双向Buck-Boost变换器控制策略。运用直流母线电压外环、直流变换器电感电流内环的控制方法实现直流微电网与储能系统之间的能量双向流动。进一步提出基于扩张状态观测器观测输出总扰动，包括负载电流和母线电压的变化，在负载扰动电流影响系统的直流母线电压最终输出前，主动从外环被控对象的输入信号电感电流或输出信号母线电压中提取扰动信息，然后尽快用控制信号将其消除，从而大大降低其对被控量的影响，以有效抑制暂态直流母线的电压波动和冲击，在母线电压产生波动时能够快速恢复到正常的工作状态。仿真验证表明：储能系统可以通过控制策略实现能量的双向传递，并且当母线产生功率波动和电流冲击时，储能系统可以使直流母线电压稳定，提高了系统的可靠性。

Abstract

In order to reduce the fluctuation of DC microgrid bus voltage

a bidirectional Buck-Boost converter control strategy based on active disturbance rejection control (ADRC) was proposed. The control method of DC bus voltage outer loop and DC converter inductance current inner loop was used to realize the bidirectional flow of energy between the DC microgrid and the energy storage system. It was further proposed to observe the total output disturbance based on the extended state observer (ESO)

including the change of load current and bus voltage. Before the load disturbance current affects the final output of the DC bus voltage of the system

the disturbance information was actively extract from the input signal inductance current or the output signal bus voltage of the controlled object in the outer loop. Then

the control signal was used to eliminate the disturbance information as soon as possible

which reduces the influence on the controlled quantity

and further suppresses the voltage fluctuation and impact of the transient DC bus. Therefore

the bus voltage can quickly recover to the normal working state when the bus voltage fluctuates. The correctness of the proposed control strategy was verified by simulation. The simulation results show that the energy storage system can achieve bidirectional energy transfer through the control strategy. In addition

when the bus generates power fluctuations and current shocks

the energy storage system can stabilize the DC bus voltage and improve the system the reliability.

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Keywords

references

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