发电机励磁的非线性解析模糊控制

该文引入非线性函数建立了一种新的解析模糊控制器用于发电机的电压控制，并引入变结构控制的思想来进行附加励磁控制，建立了一种发电机模糊励磁控制器结构。并兼顾电压调节精度和增强阻尼要求进行电压控制与稳定控制的协调。对所论非线性解析模糊控制器的动态特性分析表明所论控制器为一本质非线性PID控制器。在控制过程中，所论模糊控制器的规则基于误差和误差变化率的大小在线调整。因而具有规则自适应的特性。实际使用时。无需进行控制规则的设计，只需根据工程控制经验对控制参数进行初选，简化了控制设计。仿真研究表明：所论模糊励磁控制器可以提高发电机的电压控制精度和电力系统的稳定性。

A NONLINEAR ANALYTICAL FUZZY LOGIC EXCITATION CONTROLLER OF GENERATOR

A novel nonlinear analytical fuzzy logic controller is proposed to adjust the terminal voltage of generator by introducing a nonlinear function into analytical fuzzy logic controller. Meanwhile, variable structure fuzzy logic stabilizer is used. The structure of nonlinear analytical fuzzy logic excitation controller and the coordinated control strategies between improving voltage control performances and strengthening the stability of power systems are discussed in detail. During process of control, it adjusts the fuzzy control rules according to the deviation and the change rate of the deviation. So it is adaptive nonlinear controller with proportional, integral and derivative (PID) properties, and it is easy to implement in practice due to it is only needed to pre-adjust its parameters according to the experiences of the process control and is not needed to design the rules of fuzzy controller. The simulating studies indicate the proposed excitation controller can improve the accuracy of voltage control and strengthen the stability of electric power systems.