独立式双模糊控制ACEG变速恒频发电系统研究

Study of an ACEG Variable-speed Constant-frequency Generation System Based on Stand-alone Double Fuzzy Control

交流励磁发电机(ACEG)可实现有功、无功功率和转速的解耦控制,能改善超高压电力系统稳定性,实现变速恒频发电。ACEG系统具有多变量、非线性、强耦合和参数不确定性的特点。传统的PID控制难以解决系统耦合问题,矢量控制方法能实现控制变量解耦,却依赖具体数学模型,难以反映电机参数变化。提出了一种基于模糊矢量的控制策略,开发了一套实用小型交流励磁发电系统。实验证明该系统输出稳定,谐波少,调节迅速,动态稳定性良好。

Alternating current excited generator（ACEG） can achieve decoupling control of active power, reactive power and rotating speed.It is used to improve the stability of extra high voltage power systems and achieve variable-speed constant-frequency generation as well.ACEG system has the characteristics of muhi-variable,nonlinear,strong coupling and parameter uncertainty.The traditional PID control is hard to solve the coupling problems,while vector control methods can decouple control variables but depend on specific mathematical model which is difficult to reflect changes of the generator parameters.This paper presents a control strategy based on double fuzzy strategy and develops a practical minitype AC excitation power system.It is shown by the experiment that the generation system output stably, harmonics low, adjustment quickly, and appears good in dynamic stable performances.