AVR励磁系统主导极点配置PID控制器设计  

Design of PID Controller for AVR Excitation System Based on Dominant Pole Placement

作　　者：刘艳[1] 李银伢[2] 

机构地区：[1]盐城师范学院物理科学与电子技术学院,江苏盐城224051 [2]南京理工大学自动化学院,江苏南京210014

出　　处：《哈尔滨理工大学学报》2012年第1期43-49,共7页Journal of Harbin University of Science and Technology

基　　金：国家自然科学基金(60804019);南京理工大学卓越计划"紫金之星"资助(AB39120)

摘　　要：给出了一种基于改进型主导极点配置的自动电压调节器(automatic voltage regulator,AVR)励磁系统的PID控制器设计方法.首先将对AVR系统的时域指标转化为对主导极点的要求,引入前置滤波器后,运用根轨迹法将后续闭环主导极点配置在复平面期望区域之内,得到满足要求的KP值区间.以一定步长扫描该KP值区间,得到满足期望最大灵敏度指标的KP值子区间.在子区间中选取合适的KP值,利用所给出的解析表达式,得到PID控制器的另外两个参数和前置滤波器参数,实现对AVR系统的动态响应速度和超调量指标的折中处理.仿真结果表明,本方法得出了AVR系统的性能满足期望指标要求,可与典型智能进化算法得出的性能相媲美.An approach of PID controller design for an automatic vohage regulator （AVR） excitation system based on the improved dominant pole placement method was proposed. First, the time domain performance specifications were transferred into the requirements on the dominant poles. Then by introducing a pre-fiher, the interval of Kp was obtained using the root locus technique to constrain the post-dominant poles within the desired region in the complex plane. The subinterval satisfying the desired maximum sensitivity index was determined by gridding the above interval of Ke in fixed step size. The other parameters of the PID controller and the parameters of the pre-filter were calculated by the given analytical formulas after an appropriate value of Ke was chosen, and then the trade off between the speed and the overshoot of the transient response of the AVR system could be handled. Simulation results show that the desired performance indexes of the AVR system are met and the corresponding performance of the AVR system can be compared with the one obtained by typical intelligent evolution algorithms.

关 键 词：电力系统 电压控制 自动电压调节器(AVR) PID控制器 主导极点 根轨迹 最大灵敏度 

分 类 号：TM301.2[电气工程—电机] N273[自然科学总论]