| 引用本文: | 杨建湘,范毅然,熊建斌,等.用于孤岛模式下光储直流微网的改进超螺旋MPPT控制策略[J].电力系统保护与控制,2025,53(12):104-116.[点击复制] |
| YANG Jianxiang,FAN Yiran,XIONG Jianbin,et al.Improved super-twisting MPPT control strategy for PV-storage DC microgrid in islanded mode[J].Power System Protection and Control,2025,53(12):104-116[点击复制] |
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| 摘要: |
| 由于光储直流微网输出功率在孤岛模式下受外部环境影响较大，为提高系统的最大功率跟踪特性，采用了正反激变换器的独立光伏发电拓扑结构。针对传统滑模控制在光伏最大功率跟踪(maximum power point tracking, MPPT)中存在的滑模抖振和响应速度慢等问题，提出一种基于改进型超螺旋趋近律的MPPT滑模控制实现方法。该方法利用Sigmoid函数的连续性并与快速终端滑模面相结合，优化了超螺旋趋近律，改善了抖振效果，提高了响应速度，并利用Matlab/Simulink仿真平台与其他控制策略进行对比验证。结果表明：当系统不存在外界扰动时，所提方法均能实现对最大功率点的快速跟踪，同时具有较小的抖振。当辐照度、温度发生变化时，系统具有更好的动态响应速度和抗扰能力。 |
| 关键词: 光储直流微网 正反激变换器 MPPT 快速终端滑模 超螺旋趋近律 |
| DOI：10.19783/j.cnki.pspc.240901 |
| 投稿时间：2024-07-11修订日期：2024-11-21 |
| 基金项目:2022国家自然科学基金-广东省联合基金重点项目资助(U22A20221)；广东省自然科学基金面上项目资助(2024A1515011580) |
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| Improved super-twisting MPPT control strategy for PV-storage DC microgrid in islanded mode |
| YANG Jianxiang,FAN Yiran,XIONG Jianbin,ZHANG Jinliang,XIN Yanli,WANG Qi |
| (College of Automation, Guangdong Polytechnic Normal University, Guangzhou 510450, China) |
| Abstract: |
| In islanded mode, the output power of PV-storage DC microgrids is significantly affected by external environmental factors. To improve the system’s maximum power point tracking (MPPT) characteristics, a push-pull converter based independent photovoltaic power generation topology is adopted in this paper. To address the issues such as chattering and slow response in traditional sliding mode control (SMC) for MPPT, this paper proposes an improved super-twisting sliding mode control method based on a modified super-twisting reaching law. By leveraging the continuity of the sigmoid function in combination with the fast terminal sliding mode surface, the proposed method optimizes the super-twisting reaching law, reduces chattering, and improves response speed. Matlab/Simulink simulations are used to compare with other methods and verify the proposed control strategy. The results show that in the absence of external disturbances, the proposed method can achieve fast and accurate MPPT with minimum chattering. When irradiance or temperature varies, the system shows better dynamic response and enhanced disturbance rejection capability. |
| Key words: PV-storage DC microgrid push-pull converter MPPT fast terminal sliding mode super-twisting reaching law |
