光储孤岛直流微电网混合模式平滑切换策略

潘豪; 王震; 康庄; 程鹏; 贾利民

doi:10.19912/j.0254-0096.tynxb.2024-1671

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太阳能学报 ›› 2026, Vol. 47 ›› Issue (1) : 377-385. DOI: 10.19912/j.0254-0096.tynxb.2024-1671

光储孤岛直流微电网混合模式平滑切换策略

潘豪¹, 王震¹, 康庄², 程鹏¹, 贾利民^1,2

作者信息 +

HYBRID MODE SMOOTH SWITCHING STRATEGY FOR PV-STORAGE ISLANDED DC MICROGRIDS

Pan Hao¹, Wang Zhen¹, Kang Zhuang², Cheng Peng¹, Jia Limin^1,2

Author information +

文章历史 +

摘要

该文针对光储孤岛直流微电网中光伏系统不同运行模式切换的平稳性及母线电压控制精度问题,提出一种自适应模式平滑切换策略。首先,提出计及时延补偿的母线电压二次调整方法,减少传输时延导致的母线电压补偿偏差。其次,设计基于变系数Sigmoid函数的加权平均策略,自适应调整参考电流和模式切换时间,确保光伏系统在下垂与MPPT两种模式之间的平滑切换效果,避免控制环路变化带来的系统参数突变。在加权平均策略的基础上,引入自适应指数趋近律滑模修正方法提升系统平滑切换效率与鲁棒性,并通过动态调整滑模趋近律参数减少系统切换过程中的抖振。最后,通过硬件在环实验平台验证所提策略的有效性,结果表明该策略在应对孤岛直流微电网模式切换及电压稳定方面具有良好表现。

Abstract

In this paper, an adaptive smooth switching strategy is proposed for PV-storage islanded DC microgrids （IDCMGs） to ensure smooth switching between different operating modes of PV systems and improve the accuracy of bus voltage control. Firstly, a secondary control-based bus voltage adjustment method with time delay compensation is proposed to mitigate the bus voltage deviation caused by transmission delays. Secondly, a weighted average strategy based on a variable-coefficient sigmoid function is designed to adaptively adjust the reference current and mode switching time, ensuring smooth switching of the PV system between droop and MPPT modes and avoiding abrupt changes in system parameters caused by changes in the control loop. Based on the weighted average strategy, an adaptive exponential reaching law sliding mode correction method is introduced to enhance the efficiency and robustness of smooth switching, and the parameters of the sliding mode reaching law are dynamically adjusted to suppress chattering during the switching process. Finally, the effectiveness of the proposed strategy is verified using a hardware-in-the-loop （HIL） experimental platform, and the results demonstrate that the strategy exhibits excellent performance in handling IDCMG mode switching and voltage stability.

导出引用

潘豪, 王震, 康庄, 程鹏, 贾利民. 光储孤岛直流微电网混合模式平滑切换策略[J]. 太阳能学报. 2026, 47(1): 377-385 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1671

Pan Hao, Wang Zhen, Kang Zhuang, Cheng Peng, Jia Limin. HYBRID MODE SMOOTH SWITCHING STRATEGY FOR PV-STORAGE ISLANDED DC MICROGRIDS[J]. Acta Energiae Solaris Sinica. 2026, 47(1): 377-385 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1671

中图分类号： TM72

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