12/3相DWIG励磁系统电容电压的模糊-PI双模控制

12／3相双绕组感应发电机是为了实现适合于原动机高速运行特性而设计的一种特殊电机。系统在电机上增设了一个励磁绕组，使用静止励磁装置对电机进行励磁控制。文中对励磁装置的直流侧电容电压的控制原理和方法进行了详细讨论。给出了减小启动电流的方法。将模糊-PI双模控制应用于对有功电流的控制，用来对电容电压进行精确调整。当实际电容电压和设定的参考值误差较大时，使用模糊控制来提高系统的动态特性，当误差比较小时，使用PI控制来实现精确控制。给出了仿真和试验结果，证明这种方法可以实现电容电压的精确控制。动态试验结果表明，在突加和突卸负载时电容电压的变化非常小。

RESEARCH ON FUZZY-PI CONTROL OF CAPACITOR IN THE DC-LINK OF THE EXCITING SYSTEM IN 12/3 PHASE DOUBLE-WINDING INDUCTION GENERATOR

The 12/3 phase double-winding induction generator (DWIG) is designed especially for the high speed of primal rotor. An exciting winding is designed in the stator and the control scheme is implemented in a static exciting device. In this paper, a novel method is proposed to reduce the starting current. The fuzzy-Pi control scheme is applied to the control of the active current and the voltage of the capacitor is controlled accurately. If the error between the reference value and the actual voltage is large, then the fuzzy controller is applied to increase the dynamic response. If it is small, the PI controller is applied to control the voltage accurately. The simulation and experimental results are also presented to demonstrate the effectiveness of the proposed method. The change of the voltage in dynamic experiments is small when loading and unloading suddenly.