负荷频率系统的LFC模糊监控器设计  

Design of Fuzzy Supervisory Controller for Load Frequency System

作　　者：敖俊卿[1] 刘向杰[1] 

机构地区：[1]华北电力大学自动化系

出　　处：《广东输电与变电技术》2008年第3期14-16,共3页Guangdong Power Transmission Technology

摘　　要：应用在LFC控制中常规的模糊调整增益PI控制器和I控制器,只针对单一区域的负荷频率进行控制,并不考虑实际模型中的互相扰动。其中最突出的问题是由于不限制联络线上的功率流动,电能总是从频率高区域流向频率低区域,加剧了频率高区域的控制负担,再加上各区域控制动作的不协调,使得当扰动在不同的时间和幅值时引起系统调节过程的急剧恶化,导致整个系统不稳定。提出一种基于模糊MAMDANI推理算法的模糊监督控制器,采用各个区域的频率偏差作为控制器的输入,监督控制器作为一种前馈补偿,设计输出为一个ACE的倍数,加快调节过程,到达稳态。经过实验仿真数据对比,说明提出的监督控制器能有效提高系统的稳定性。Conventional LFC controller are PI controllers by fuzzy adjustment gain or I controllers usually,and they are all designed for single area,without taking interactions between connected power grid into consideration.Then,the load disturbance in one area would affect another area.Typical character of LFC model is:that energy direction is in disorder,its direction is from high frequency to low frequency area.However,the stability is aggravated by this specialty.In an ultimate condition,it would make systems unstable.In this paper,a new supervisor controller is proposed.The very controller is designed based on the Mamdani inference method of fuzzy control,area frequency deviations are adopted as input variables,and the output is chosen to accelerate the response speed of controller in order to compensate the disorder interactions on the line.Then,it ends the transient procedure as quickly as possible.Compared the simulation results with conventional control methods,the new supervisor fuzzy controller can increase power system stability efficiently.

关 键 词：模糊控制 监督控制器 LFC 互联电力系统 

分 类 号：TM571[电气工程—电器]