| 引用本文: | 于永进,孙国强,樊英杰.基于动态事件触发机制的孤岛微电网频率控制方法研究[J].电力系统保护与控制,2024,52(20):60-71.[点击复制] |
| YU Yongjin,SUN Guoqiang,FAN Yingjie.A frequency control method for an islanded microgrid based on a dynamic event-triggered mechanism[J].Power System Protection and Control,2024,52(20):60-71[点击复制] |
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| 摘要: |
| 针对传统周期采样方案在微电网频率控制中存在数据冗余和通信资源浪费等问题，研究了基于动态事件触发机制的孤岛微电网二次频率控制方法。为了减少冗余控制数据，采用阈值可根据最新传输值和当前测量值误差调整的动态事件触发的方式来确定是否需要发送采样信息。首先，选取合适的Lyapunov泛函数，推导出微电网频率控制系统渐进稳定且满足给定期望H∞鲁棒性能的充分条件。其次，对控制器进行联合设计得到满足以上要求的控制器增益，保证事件触发机制的可行性。证明相邻两次触发时刻的差值为唯一非零正数，保证了Zeno现象不会发生。最后，通过4种场景的仿真分析验证了所提方法的有效性和实用性。 |
| 关键词: 事件触发机制 频率控制 孤岛微电网 稳定性分析 |
| DOI：10.19783/j.cnki.pspc.240127 |
| 投稿时间：2024-01-26修订日期：2024-03-29 |
| 基金项目:国家自然科学基金项目资助(62003794) |
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| A frequency control method for an islanded microgrid based on a dynamic event-triggered mechanism |
| YU Yongjin1,SUN Guoqiang2,FAN Yingjie1 |
| (1. College of Electrical Engineering and Automation, Shandong University of Science and Technology, Qingdao 266590, China;
2. Binzhou Power Supply Company, State Grid Shandong Electric Power Company, Binzhou 256600, China) |
| Abstract: |
| There are problems of data redundancy and communication resource waste in traditional periodic sampling schemes in frequency control of microgrids. Thus this paper studies the secondary frequency control methods of islanded microgrids based on dynamic event-triggered mechanism. To reduce redundant control data, a dynamic event-triggered method using thresholds that can be adjusted based on the latest transmission value and the current measurement value error is used to determine whether sampling information needs to be sent. First, a series of appropriate Lyapunov functionals are selected to derive sufficient conditions for the asymptotic stability of the microgrid frequency control system and to achieve the expected H∞ robust performance. Then, a controller is designed jointly to get controller gains meeting the above requirements to ensure the feasibility of the dynamic event-triggered mechanism. It is concluded that the difference between two adjacent triggering times is a unique non-zero positive number, which can ensure that the Zeno phenomenon will not occur. Finally, the effectiveness and practicality of the proposed method are verified through simulation analysis of four scenarios. |
| Key words: event-triggered mechanism frequency control islanded microgrid stability analysis |
