基于卡尔曼滤波的虚拟电厂时间同步方法  

Time Synchronization Method for Virtual Power Plants Based on Kalman Filter

作　　者：侯战胜 刘世栋 刘川 陶静 王向群 鲍兴川 HOU Zhansheng;LIU Shidong;LIU Chuan;TAO Jing;WANG Xiangqun;BAO Xingchuan(China Electric Power Research Institute Co.,Ltd.,Nanjing 210003,Jiangsu Province,China)

机构地区：[1]中国电力科学研究院有限公司,江苏省南京市210003

出　　处：《电力信息与通信技术》2024年第11期1-6,共6页Electric Power Information and Communication Technology

基　　金：国家重点研发计划资助项目“规模化灵活资源虚拟电厂聚合互动调控关键技术”(2021YFB2401200)。

摘　　要：随着分布式能源的增多和电力系统的不断发展,虚拟电厂作为集成分布式能源资源的先进模式应运而生,其协调过程中各设备间的时间同步尤为关键,这就需要精确和可靠的时间同步技术。文章以IEEE 1588精密时钟时间协议(precision time protocol,PTP)为基础,针对虚拟电厂的高精度时间同步需求,设计了一种基于卡尔曼滤波器的PTP状态模型优化方法。该方法通过迭代卡尔曼滤波器对时钟偏移和频率偏移进行动态补偿,有效降低了时间同步的误差,实现了虚拟电厂的高精度时间同步。通过仿真实验验证,本方法在减少时钟偏移和频率偏移方面表现出良好的效果,显著提高了同步精度。研究的成果对于解决虚拟电厂中的时间同步问题具有重要意义。With the increase of distributed energy and the continuous development of power systems,virtual power plants have emerged as an advanced model for integrating distributed energy resources.The key to their coordination process is the time synchronization between various devices,which requires precise and reliable time synchronization technology.This paper is based on the IEEE 1588 precision clock time synchronization protocol(PTP)and designs a Kalman filter based PTP state model optimization method to meet the high-precision time synchronization requirements of virtual power plants.This method dynamically compensates for clock and frequency offsets through iterative Kalman filter,effectively reducing time synchronization errors and achieving high-precision time synchronization for virtual power plants.Through simulation experiments,this method has shown good performance in reducing clock offset and frequency offset,significantly improving synchronization accuracy.The results of this study are of great significance for solving the time synchronization problem in virtual power plants.

关 键 词：虚拟电厂 时间同步 PTP 卡尔曼滤波器 

分 类 号：TN915.853[电子电信—通信与信息系统]