基于自适应GA自抗扰控制在蒸汽发生器水位控制中的应用研究

Research on Application of Active Disturbance Rejection Control Based on Adaptive GA in Water Level Control of Steam Generator

核电厂蒸汽发生器是一个非线性、时变的系统。把自抗扰控制方法引入蒸汽发生器水位的串级控制系统中,能够解决传统PID控制中快速性和超调的矛盾,且能够动态补偿对象模型的内扰动和外扰动。由于自抗扰控制器参数众多,无统一调整规范,参数难以整定,为解决这一问题,采用自适应遗传算法来对自抗扰控制器参数进行优化。计算机仿真结果表明,本文控制方法的鲁棒性和控制品质优于传统的串级PID控制方法。

The steam generator of nuclear power plant is a nonlinear,time-varying system.Application of the active disturbance rejection control method in the water level control of steam generator can solve the contradiction between speed and overshoot in the conventional PID control system,and it also can compen-sate the internal and external disturbances of the object model dynamically.However,ADRC parameters are numerous and without uniform adjustment specification,and are very difficult to be tuned.In order to over-come the difficulties in the parameter tuning of the ADRC,the adaptive genetic algorithm is used to tune ADRC parameters.The simulation results show that its robustness and its control quality are better than those of the traditional cascade PID control.