| 引用本文: | 曹 晓,李 泽,崔国增.孤岛微电网固定时间分布式鲁棒二次控制[J].电力系统保护与控制,2024,52(12):143-153.[点击复制] |
| CAO Xiao,LI Ze,CUI Guozeng.Distributed robust fixed-time secondary control of islanded microgrids[J].Power System Protection and Control,2024,52(12):143-153[点击复制] |
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| 摘要: |
| 针对孤岛微电网实际运行过程中出现的未知外部扰动，提出了一种固定时间分布式鲁棒二次控制算法，实现了电网频率一致性控制，有效抑制了不确定干扰，提高了系统的鲁棒性能。首先，通过设计基于饱和函数的新型控制算法，有效地解决了现有控制器高频切换引发的抖动问题。同时确保二次控制能够在固定时间内达到稳定状态，且收敛时间上界不依赖于任何初始状态。然后，在设计控制算法的基础上，采用改进的分布式事件触发机制，在满足收敛速度和达到电网频率一致性的基础上减轻了通信负担，减少了控制器更新的频率，显著降低了通信资源的消耗，并排除了Zeno行为。最后，利用Matlab/Simulink仿真平台验证了所提控制算法的有效性。 |
| 关键词: 孤岛微电网 未知扰动 固定时间一致性 分布式事件触发机制 Zeno行为 |
| DOI：10.19783/j.cnki.pspc.231420 |
| 投稿时间：2023-11-06修订日期：2024-01-20 |
| 基金项目:江苏省自然科学基金优秀青年基金项目资助(BK20211605)；江苏省研究生科研与实践创新计划项目资助(SJCX23_1721) |
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| Distributed robust fixed-time secondary control of islanded microgrids |
| CAO Xiao,LI Ze,CUI Guozeng |
| (School of Electronic and Information Engineering, Suzhou University of Science and Technology, Suzhou 215009, China) |
| Abstract: |
| In response to the unknown external disturbances encountered during the operation of islanded microgrids, a fixed-time distributed robust secondary control algorithm is proposed to achieve grid frequency consensus control. This effectively suppresses uncertain disturbances, and enhances the robustness of the system. First, by designing a novel control algorithm based on saturation functions, the issue of oscillations caused by high-frequency switching in existing controllers is effectively resolved. Additionally, it ensures that the secondary control reaches a stable state within a fixed-time, with a convergence time upper bound independent of any initial states. Secondly, building upon the designed control algorithm, an improved distributed event-triggered mechanism is employed. This reduces the communication burden and minimizes the controller update frequency while satisfying the convergence speed requirement and achieving frequency consensus in the microgrid. This approach significantly decreases the consumption of communication resources and eliminates Zeno behavior. Finally, the effectiveness of the proposed control algorithm is validated using the Matlab/Simulink simulation platform. |
| Key words: islanded microgrids unknown disturbances fixed-time consensus distributed event-triggered mechanism Zeno behavior |
