摘 要：针对核电站稳压器压力控制系统的非线性、时变性等特点，利用分数阶PID （PIλDμ）控制器实现对系统由点到面的控制，利用最优Oustaloup算法实现PIλDμ控制器的参数整定，采用改进的人工鱼群算法（artificial fish awahm,AFSA）对PIλDμ 控制器的参数进行寻尤，并在分数阶控制的基础上引入短反馈算法，使控制更加精确。仿真结果表明：与传统控制方法相比，基于改进人工鱼群算法优化的分数阶PID控制器能够减小超调量、缩短调节时间、降低稳态误差和提高控制精度，不仅具有较好的动态响应性能还有较强的扰动抑制能力。

Abstract: In view of the nonlinear and timevarying problems of the pressure control system of the nuclear power plant,the fractional order PID controller is used to control the sytem,to realize the pointtosurface control. The optimal Oustaloup algorithm is used to digitally realize the PIλDμ control. Based on the fractional order control,a short feedback algorithm is introduced to make the control more precise. Aiming at the parameter tuning problem of PIλDμ controller,an improved artificial fish swarm algorithm is used to optimize the parameters. The simulation results show that the fractional PID controller optimized by the improved artificial fish swarm algorithm performs well in the regulator control system. Compared with the traditional control method,the PIλDμ controller produces small overshoot,its adjusting time is shortened evidently,the steady-state error is small,and the control precision is high. It has not only sound dynamic response performance,but also strong disturbance rejection ability.

TL361

上海市电站自动化技术重点实验室课题(13DZ2273800) ；上海发电过程智能管控工程技术研究中心课题(14DZ2251100)