| 引用本文: | 刘道生,宋忠文,熊世豪,等.基于改进LADRC-PI双闭环控制的单相光伏逆变器控制策略研究[J].电力系统保护与控制,2025,53(9):82-92.[点击复制] |
| LIU Daosheng,SONG Zhongwen,XIONG Shihao,et al.Research on control strategy of single-phase photovoltaic inverter based on improved LADRC-PI dual closed-loop control[J].Power System Protection and Control,2025,53(9):82-92[点击复制] |
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| 摘要: |
| 在光伏发电控制领域中，光伏逆变器控制作为重要的一环，其双闭环控制中比例积分(proportional integral, PI)等线性化控制方式在电压外环电流内环中得到广泛应用。然而传统PI等线性化控制方式没有考虑光伏逆变器系统的非线性特性，在此控制下逆变器的动静态性能和鲁棒性较差。提出一种改进线性自抗扰控制器(linear active disturbance rejection control, LADRC)和PI控制相结合的双闭环控制策略。为避免光伏逆变器系统振荡，提高系统稳定性，提出了将输出误差补偿项加入线性状态误差反馈控制律中的改进LADRC，并将其应用于双闭环控制的电压外环中，电流内环使用PI控制。然后，经过参数整定和控制器性能分析，实现对1.2 kW单相光伏逆变器系统的控制。在Matlab/Simulink中建模仿真，分析改进LADRC-PI控制策略对单相光伏逆变器性能的影响。仿真结果表明，相较于双闭环PI控制，改进LADRC-PI双闭环控制的单相光伏逆变器系统稳定性较好，系统响应速度快，具有更好的动静态性能和鲁棒性。 |
| 关键词: 光伏逆变器 线性自抗扰控制器 线性状态误差反馈律 超调量 系统响应 |
| DOI：10.19783/j.cnki.pspc.240912 |
| 投稿时间：2024-07-13修订日期：2024-12-17 |
| 基金项目:国家自然科学基金项目资助(52167017)；江西省自然科学基金项目资助(20224BAB204054)；赣鄱俊才支持计划-主要学科学术和技术带头人培养项目—领军人才(学术类)(20232BCJ22006) |
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| Research on control strategy of single-phase photovoltaic inverter based on improved LADRC-PI dual closed-loop control |
| LIU Daosheng,SONG Zhongwen,XIONG Shihao,WANG Shihui |
| (School of Electrical Engineering and Automation, Jiangxi University of Science and Technology, Ganzhou 341000, China) |
| Abstract: |
| In the field of photovoltaic (PV) power generation control, inverter control plays a crucial role. In dual-loop control strategies, linear control methods such as proportional-integral (PI) control are widely used in the outer voltage loop and inner current loop. However, traditional PI and other linear control methods do not consider the nonlinear characteristics of PV inverter systems, resulting in poor dynamic and static performance and robustness. This paper proposes a dual-loop control strategy combining an improved linear active disturbance rejection controller (LADRC) with PI control. To avoid oscillations in the PV inverter system and improve system stability, an improved LADRC is designed by adding an output error compensation term to the linear state error feedback control law, and is applied to the outer voltage loop, while PI control is used in the inner current loop. After parameter tuning and controller performance analysis, it realizes the control on a 1.2 kW single-phase PV inverter system. The system is modelled and simulated in Matlab/Simulink to analyze the influence of the improved LADRC-PI control strategy on single-phase photovoltaic inverter performance. Simulation results show that compared with the traditional dual-loop PI control, the improved LADRC-PI dual-loop control has better system stability, faster response speed, and the improved dynamic and static performance and robustness. |
| Key words: photovoltaic inverter LADRC LSEF overshoot system response |
