低通滤波PID水轮机调速系统设计  

Design of Low Pass Filter PID Controller for Speed Governing System of Hydro Turbine

作　　者：孔繁镍[1] 马伏花[2] 李燕[2] 

机构地区：[1]广西大学电气工程学院,南宁530003 [2]广西民族大学信息科学与工程学院,南宁530006

出　　处：《控制工程》2016年第2期173-177,共5页Control Engineering of China

基　　金：国家自然科学基金项目(51167003);广西自然科学基金项目(2014GXNSFAA118320);广西高校优秀人才资助计划资助项目

摘　　要：为了克服传统PID控制器中微分环节调节困难且难以抑制高频测量噪声信号干扰而导致系统稳定性变差的缺陷,在充分阐述高频信号对传统PID控制器影响机理基础上,通过设计串联低通滤波器,降低了高频信号对控制系统影响,提出了一种低通滤波PID控制器设计方法,并把其应用于所建立的弹性水锤效应水轮机调速系统模型。在MATLAB环境下的仿真结果表明,与传统PI、PID控制器相比,低通滤波PID控制器具有更好的时域和频域性能指标,并且对高频测量噪声扰动不敏感,具有良好的鲁棒性能和抗负荷干扰性能,能满足水轮机调速系统性能指标要求。In order to conquer disadvantages of system stability descending resulting from high frequency measurement noise signals for the conventional proportional integral derivative （PID） controller, this paper proposes a design method of low pass filter PID by cascading low pass filter which can attenuate high frequency signals after interpreting how the high frequency noise signal affects the conventional PID, then the proposed low pass filter PID is applied to hydro turbine speed governing system design considering elastic water hammer. The simulation results in MATLAB demonstrate that the designed low pass filter PID controller can filter high frequency measurement noise signals, and has more excellent time domain and frequency domain performance index compared to those conventional PI and PID controllers. Besides, it has strong robust performance and nice rejection load disturbance performance, fulfills the performance index of hydro turbine speed governing system.

关 键 词：水轮机调速系统 弹性水锤 低通滤波PID PI PID 

分 类 号：TP27[自动化与计算机技术—检测技术与自动化装置]