发电技术 ›› 2026, Vol. 47 ›› Issue (1): 111-121.DOI: 10.12096/j.2096-4528.pgt.260110

• 储能 • 上一篇    

基于模糊自抗扰的光储预同步虚拟同步发电机并网策略

李涛1,2, 张春1,2, 胡添诚1,2   

  1. 1.安徽工程大学电气工程学院,安徽省 芜湖市 241000
    2.高端装备先进感知与智能控制教育部重点实验室,安徽省 芜湖市 241000
  • 收稿日期:2025-01-04 修回日期:2025-02-19 出版日期:2026-02-28 发布日期:2026-02-12
  • 通讯作者: 张春
  • 作者简介:李涛(1997),男,硕士研究生,研究方向为新能源发电、光储逆变器,1292669241@qq.com
    张春(1972),男,硕士,教授,研究方向为智能控制理论与应用、智能微电网系统,本文通信作者,chzhang@ahpu.edu.cn
  • 基金资助:
    国家自然科学基金项目(U21A20146);安徽高校协同创新项目(GXXT-2020-070)

Pre-Synchronization Virtual Synchronous Generator Grid-Connection Strategy Based on Fuzzy Active Disturbance Rejection for Photovoltaic Storage

Tao LI1,2, Chun ZHANG1,2, Tiancheng HU1,2   

  1. 1.School of Electrical Engineering, Anhui Polytechnic University, Wuhu 241000, Anhui Province, China
    2.Key Laboratory of Advanced Sensing and Intelligent Control for High-End Equipment, Ministry of Education, Wuhu 241000, Anhui Province, China
  • Received:2025-01-04 Revised:2025-02-19 Published:2026-02-28 Online:2026-02-12
  • Contact: Chun ZHANG
  • Supported by:
    National Natural Science Foundation of China(U21A20146);Anhui University Collaborative Innovation Project(GXXT-2020-070)

摘要:

目的 虚拟同步发电机(virtual synchronous generator,VSG)因其能够调节逆变器并网中的阻尼和惯性而得到广泛应用。但在实际工况下,线路普遍存在阻抗以及离/并网预同步过程中容易出现电压电流畸变。为此,对VSG的控制结构和预同步方法进行了优化。 方法 采用光伏发电系统和混合储能代替传统的直流源用于模拟实际情况,并在传统VSG模型中增加虚拟有功和虚拟电流来补偿并网过程中存在的相位差和幅值差,以实现频率和电压的调节。针对传统线性自抗扰控制(linear active disturbance rejection control,LADRC)系统中的PD控制参数选定问题,采用模糊控制在线自适应整定PD控制参数,并将LADRC引入有功环进行二次调频,以增加系统的鲁棒性。 结果 通过MATLAB/Simulink的仿真验证了该方法设计的可行性,表明预同步控制系统运行效果优越。 结论 模糊LADRC可以快速实现平滑并网,抑制网侧电流冲击和降低频率振荡,从而提高并网逆变器-电网交互系统的稳定性。

关键词: 虚拟同步发电机(VSG), 微电网, 分布式能源, 预同步, 阻抗, 虚拟电流, 模糊线性自抗扰控制, 光储系统

Abstract:

Objectives Virtual synchronous generator (VSG) technology is extensively utilized for its capability to regulate damping and inertia during inverter grid connection. However, line impedance is commonly present, and voltage and current distortions are prone to occur during the pre-synchronization process of disconnection and grid connection. Therefore, the control structure and pre-synchronization method of VSG are optimized. Methods A photovoltaic power generation system and hybrid energy storage are used to replace a traditional DC source, simulating actual conditions. Virtual active power and virtual current are incorporated into the conventional VSG model to compensate for phase and amplitude differences during grid connection, thereby achieving frequency and voltage regulation. To address the issue of selecting PD control parameters in a traditional linear active disturbance rejection control (LADRC) system, fuzzy control is employed to adaptively adjust these PD parameters online. Furthermore, LADRC is introduced into the active power loop for secondary frequency regulation, which enhances system robustness. Results The feasibility of the proposed method is verified through MATLAB/Simulink simulation, which demonstrates the excellent performance of the pre-synchronization control system. Conclusions The fuzzy LADRC enables rapid and smooth grid connection, suppresses grid-side current surges, and reduces frequency oscillations, thereby improving the stability of the grid-connected inverter-grid interaction system.

Key words: virtual synchronous generator (VSG), microgrid, distributed energy, pre-synchronization, impedance, virtual current, fuzzy linear active disturbance rejection control, photovoltaic storage system

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