一种改进的模糊控制电容投切方法的研究

Research on Capacitor Switching Based on Improved Fuzzy Control Method

为提高无功补偿中电容投切的控制效果,提出一种改进的模糊控制投切方法。该方法采用三输入单输出的形式,以电压、功率因数及功率因数变化率作为输入设计模糊控制系统,既解决了电容投切造成的电压波动问题,又对系统状态进行了有效预判。利用MATLAB软件对其进行计算、仿真,其结果符合无功补偿原则和实际设计要求。这种改进的电容投切方案,消除了不必要的往复投切,避免了投切振荡,提高了系统跟随性,获得了理想的控制效果。

In order to improve the control effect of the reactive power compensation in capacitor switching, an improved fuzzy control method is proposed. With the voltage, power factor and change rate of power factor as inputs, the ternate input single output fuzzy control system is designed. By this way, the problem of the capacitor switching influence on voltage is solved and the system state is effectively predicted. In addition, MATLAB is used for simulation in this paper to verify that the result is in conformity with the principle and requirements of reactive compensation. The proposed method can successfully eliminate unnecessary reciprocated switching and improve tracking performance. Consequently, satisfactory control effect is obtained.