预测函数算法在同步发电机励磁系统中的应用

摘要

预测函数控制(Predictive Function Control)方法克服了传统预测控制算法复杂、在线计算量大的缺点,具有算法简单、计算量小、跟踪速度快和精度高等优点,适合同步发电机励磁等快速系统.介绍了预测函数控制(PFC)的基本原理和特点,成功地将预测函数控制算法运用到同步发电机励磁系统中.仿真结果表明:预测函数控制算法的控制效果明显优于PID和分数阶PID控制器,其对同步发电机启动时的机端电压、短路时的电压和断路时的电压等都能起到良好的控制作用.%Predictive Function Control (PFC) shares the same working principle with traditional predictive control methods,namely model prediction,rolling optimization and feedback compensation. Yet the PFC overmatches traditional ones in its simple algorithm,low computational burden,fast tracking and high precision,which makes it suitable to fast systems, such as excitation system of synchronous generator. This paper introduces the basic principles and characteristics of PFC and applies it to the synchronous generator excitation system. Simulation results show that the PFC can control the synchronous generator's port voltage,short circuit voltage and open circuit voltage,and the control effect of PFC is better than that of PID and FOPID.