| 引用本文: | 马文忠,张家瑞,王玉生,张文艳,李恒硕,朱亚恒.计及SOC自恢复的混合储能系统功率优化分配策略[J].电力自动化设备,2025,45(3): |
| MA Wenzhong,ZHANG Jiarui,WANG Yusheng,ZHANG Wenyan,LI Hengshuo,ZHU Yaheng.Optimal power distribution strategy of hybrid energy storage system considering SOC self-recovery[J].Electric Power Automation Equipment,2025,45(3): |
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| 摘要: |
| 直流微电网混合储能系统中的超级电容器和蓄电池在工作期间的荷电状态(SOC)易越限，且两者会相互影响，导致SOC恢复效果减弱。为了解决上述问题，提出一种基于双层模糊控制的混合储能系统功率二次分配策略。在第一层SOC自恢复控制上增加第二层约束控制，对恢复量加以限制，以增强SOC恢复效果。针对低频阶段虚拟电容因其特性减弱SOC恢复效果，高频阶段分频控制与SOC自恢复控制相互耦合影响的问题，对功率的二次分配进行优化，在低频阶段加入恢复补偿环节，在高频阶段将分频控制与SOC自恢复控制解耦并加入解耦补偿环节，使得恢复效果最大化，从而延长储能装置的寿命并加快功率响应速度。在MATLAB/Simulink中搭建相关模型进行仿真分析，结果表明所提控制策略可以增强SOC恢复效果，提高系统运行稳定性。 |
| 关键词: 混合储能系统 SOC自恢复 补偿环节 功率分配 模糊控制 |
| DOI：10.16081/j.epae.202412008 |
| 分类号:TM761 |
| 基金项目:国家自然科学基金资助项目(52277208) |
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| Optimal power distribution strategy of hybrid energy storage system considering SOC self-recovery |
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MA Wenzhong1, ZHANG Jiarui1, WANG Yusheng2, ZHANG Wenyan1, LI Hengshuo1, ZHU Yaheng1
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1.College of New Energy, China University of Petroleum(East China),Qingdao 266580, China;2.PetroChina Planning and Engineering Institute, Beijing 100083, China
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| Abstract: |
| In the DC microgrid, the state of charge(SOC) of supercapacitor and battery in the hybrid energy storage system is easy to exceed the limit during operation, and the interaction between them will lead to the weakening of SOC recovery effect. In order to solve the above problems, a power secondary distribution strategy of hybrid energy storage system based on double-layer fuzzy control is proposed. The second layer constraint control is added to the first layer SOC self-recovery control to limit the recovery value, so as to enhance the SOC recovery effect. In view of the problems that the SOC recovery effect is weakened by the virtual capacitor due to its characteristics in the low frequency stage and the coupling effect between the frequency division control and the SOC self-recovery control in the high frequency stage, the secondary power distribution is optimized. The recovery compensation unit is added in the low frequency stage, and the frequency division control and SOC self-recovery control are decoupled and the decoupling compensation unit is added in the high frequency stage, so as to maximize the recovery effect, prolong the life of the energy storage device and speed up the power response. The relevant model is established in MATLAB/Simulink for simulation analysis, and the results show that the proposed control strategy can enhance the SOC recovery effect and improve the system stability. |
| Key words: hybrid energy storage system SOC self-recovery compensation unit power distribution fuzzy control |
