减少区域间扰动的LFC模糊监督控制器设计

Design of LFC Fuzzy Monitoring Controller for Reducing Inter-regional Disturbance

在LFC控制中最典型的问题就是由于联络线上的功率流动无限制,电能的流向总是从频率高的区域流向频率低的区域,这就加重了频率高的区域的控制负担;再加上各区域控制动作的不协调,使扰动在不同的时间、不同幅值发生时,引起系统的调节过程的急剧恶化,甚至导致整个系统的不稳定。根据研究对象的特性以及调节对象的特点,文章提出一种基于模糊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,考虑监督控制器作为一种前馈补偿,设计输出为一个ACE的倍数,用以加大或者减小控制器的动作量,来控制主汽门的开度,以求在有联络线相互干扰的条件下,系统能尽快的结束调节过程,进入稳定状态。经过实验仿真数据对比发现,提出的监督控制器能有效的提高系统的稳定性。

The most typical problem of LFC control is that the power flow on contact - line unlimited, energy direction always flows from high frequency area to low frequency area, then has increased the control burden of high frequency area. In addition incompatibility control action of various regions, makes disturbances occur at different times and different amplitudes, causing a sharp deterioration of adjustment process, even leading to the entire system instability. The paper puts forward fuzzy monitoring controller based on MAMDANI reasoning algorithm, adopting the frequency deviation of various regions as the controller input, considering monitoring controller as a feed forward compensation, designed output as ACE multiple, by increasing or reducing the controller＇ s actions amount to control the opening of main steam door, in condition of contact - line interfere with each other, the system will end as soon as the adjustment process into a stable state. Through comparing the experiments simulation data can be found that the monitoring controller can effectively improve the system stability.