基于改进粒子滤波的微电网频率自适应控制方法研究  

Research on Microgrid Frequency Adaptive Control Method Based on Improved Particle Filtering

作　　者：李世涛 张鑫堯 LI Shitao;ZHANG Xinyao(Guoneng Guangdong Radio Mountain Power Generation Co.,Ltd.,Jiangmen 529200,China)

机构地区：[1]国能粤电台山发电有限公司,广东江门529200

出　　处：《自动化仪表》2024年第5期118-122,126,共6页Process Automation Instrumentation

摘　　要：当前,微电网频率自适应控制方法无法准确求取系统内部频率指令,导致控制频率偏差值较大。针对这一问题,提出基于改进粒子滤波的微电网频率自适应控制方法。根据微电网系统的结构,对节点逆变器和多源负荷进行分别建模。采用同调函数对系统子模型进行拟合,构建微电网系统等值模型。引入改进粒子滤波算法提取原始频率时间序列中的高频分量,并结合粒子归一化权重计算系统内部频率调度函数,以获取准确的频率指令,从而完成初始功率的分配。采用模糊逻辑原理设计频率自适应控制器,实现对微电网频率的自适应控制。以含分布式电源的微电网系统作为仿真案例进行试验。试验结果表明,利用所提方法对系统的频率波动进行控制,所得到的控制频率偏差值始终在0.05以下。该研究实现了微电网频率自适应,且控制频率偏差值较低、整体控制效果较好。The current microgrid frequency adaptive control method cannot accurately find the internal frequency command of the system,which leads to a large deviation value of the control frequency.To address this problem,a microgrid frequency adaptive control method based on improved particle filtering is proposed.According to the structure of the microgrid system,the node inverters and multi-source loads are modeled separately.The homotopy function is used to fit the system sub-model and construct the equivalent model of the microgrid system.The improved particle filtering algorithm is introduced to extract the high-frequency components in the original frequency time series and combined with the particle normalized weights to compute the internal frequency scheduling function of the system,so as to obtain accurate frequency commands to complete the initial power allocation.The principle of fuzzy logic is used to design the frequency adaptive controller to realize the adaptive control of the microgrid frequency.The microgrid system containing distributed power is tested as a simulation case.The experimental results show that the frequency fluctuation of the system is controlled using the proposed method,and the obtained control frequency deviation value is always below 0.05.The research realizes the microgrid frequency self-adaptation with low control frequency deviation value and good overall control effect.

关 键 词：新能源 微电网 改进粒子滤波 频率波动 自适应控制 功率调度指令 频率分配 

分 类 号：TH-17[机械工程]