区域一致趋同的分布式负荷频率控制方法研究

Distributed Load Frequency Control Method in a Regionally Consistent Manner

随着可再生能源发电比例的上升,电力系统呈现源荷双重不确定性,对频率稳定产生不利影响。提出一种结合多智能体一致算法与动态面控制的分布式负荷频率控制方法,以增强电力系统的频率调节性能。首先,给出频率控制模型结构,并设计系统框架与分散式区域观测器;其次,考虑通信时滞的影响,设计出各区域控制器结构;最后,基于互联电力系统算例验证了方法的有效性与优越性。与传统控制方法相比,该控制方法改善了电力系统负荷频率控制性能,提高了区域间频率调节的一致性。

With the proportion increase of renewable energy generation,the power system has source-load double uncertainty,having negative effect on frequency stability.The paper proposes a distributed load frequency control(LFC)method by combining the multiagent consensus algorithm with dynamic surface control to enhance the frequency regulation performance of the power system.Firstly,the structure of frequency control model is given,and the system framework and the decentralized area observer are designed.Then considering the influence of communication delay,the controller structure for each area is designed.Finally,the effectiveness and superiority of this method is verified with the simulation of the interconnected power system.Compared with the traditional control method,this method improves LFC performance and enhances the consistency of frequency regulation among the areas.