发电技术 ›› 2026, Vol. 47 ›› Issue (1): 195-203.DOI: 10.12096/j.2096-4528.pgt.260118

• 新型电力系统 • 上一篇    

交直流微电网互联变换器功率协调自抗扰控制策略

刘素梅1, 徐文成1, 孙曦冉2, 余非3, 胡春鹤1   

  1. 1.北京林业大学工学院,北京市 海淀区 100083
    2.中国船舶集团有限公司系统工程;研究院,北京市 海淀区 100094
    3.生态环境部核与辐射安全中心,北京市 海淀区 100088
  • 收稿日期:2025-01-15 修回日期:2025-03-25 出版日期:2026-02-28 发布日期:2026-02-12
  • 作者简介:刘素梅(1981),女,博士,副教授,研究方向为新能源电力系统控制与保护,smliu@bjfu.edu.cn
    徐文成(2000),男,硕士研究生,研究方向为新能源电力系统控制与保护,xu18811375699@163.com
  • 基金资助:
    国家自然科学基金青年基金项目(52107069)

Active Disturbance Rejection Control Strategy for Power Coordination of Interlinking Converters in AC/DC Microgrids

Sumei LIU1, Wencheng XU1, Xiran SUN2, Fei YU3, Chunhe HU1   

  1. 1.School of Technology, Beijing Forestry University, Haidian District, Beijing 100083, China
    2.Systems Engineering Research Institute, China State Shipbuilding Corporation Limited, Haidian District, Beijing 100094, China
    3.Nuclear and Radiation Safety Center, Ministry of Ecological Environment, Haidian District, Beijing 100088, China
  • Received:2025-01-15 Revised:2025-03-25 Published:2026-02-28 Online:2026-02-12
  • Supported by:
    Young Scientists Fund of the National Natural Science Foundation of China(52107069)

摘要:

目的 为确保交直流子网之间能量稳定平滑流动,解决由于大功率交流或直流负荷不确定投切而导致互联变换器控制效果恶化的问题,提出了一种基于二阶线性自抗扰控制(active disturbance rejection control,ADRC)的互联变换器功率协调控制策略。 方法 首先,在计及变换器传输功率的基础上,利用电流观测器估计交流或直流子网中大负荷投切扰动;然后,在控制回路反馈通道中补偿扰动量,以实现在大功率负荷投切时交流子网频率、直流子网母线电压均始终能够在允许范围内变化;最后,基于MATLAB/Simulink搭建了独立交直流混合微电网的电磁暂态仿真模型,验证了所提功率协调自抗扰控制策略的有效性。 结果 在独立微电网中有大功率负荷投切时,所提控制策略能够实时精准调控流经互联变换器的有功功率,保证交流子网频率与直流母线电压在稳定运行范围内,解决了采用传统PI控制器滞后跟踪大负荷投切导致的系统失稳问题。 结论 与传统控制策略对比,所提控制策略使得微电网的可靠性与稳定性增加。

关键词: 交直流微电网, 互联变换器, 自抗扰控制(ADRC), 下垂控制, 负荷投切, 控制策略

Abstract:

Objectives To ensure stable and smooth energy flow between AC and DC subnets and address the degradation of interlinking converter control performance caused by uncertain switching of high-power AC or DC loads, a power coordination control strategy for interlinking converters based on a second-order linear active disturbance rejection controller is proposed. Methods Based on the transmission power of the converters, a current observer is utilized to estimate the disturbance caused by high-power load switching in the AC or DC subnet. Then, the disturbance is compensated in the feedback channel of the control loop to ensure that the frequency of the AC subnet and the bus voltage of the DC subnet can always remain within permissible ranges during high-power load switching. Finally, an electromagnetic transient simulation model of an isolated AC-DC hybrid microgrid is established based on MATLAB/Simulink to verify the effectiveness of the proposed ADRC-based power coordination control strategy. Results When a large power load is switched on in an independent microgrid, the proposed control strategy can accurately regulate the active power flowing through the interconnected converter in real time, ensuring that the AC subnet frequency and DC bus voltage are within the stable operating range, so as to solve the problem of using traditional PI controllers. The problem of system instability caused by lagging tracking large load switching.[Conslusions] A comparison with traditional control strategies shows that the proposed control strategy improves the reliability and stability of the microgrid.

Key words: AC/DC microgrid, interlinking converter, active disturbance rejection control (ADRC), droop control, load switching, control strategy

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