Delay-dependent Robust Stability Analysis of Power Systems with PID Controller  

作　　者：Li Shen Huiqin Xiao 

机构地区：[1]School of Electrical and Information Engineering,Hunan University of Technology,Zhuzhou 412007,China

出　　处：《Chinese Journal of Electrical Engineering》2019年第2期79-86,共8页中国电气工程学报（英文）

基　　金：Supported by National Natural Science Foundation of China(61703153);Research and Innovation Foundation for Graduate Students of Hunan University of Technology(CX1932).

摘　　要：This study examines the robust stability of a power system,which is based on proportional-integral-derivative load frequency control and involves uncertain parameters and time delays.The model of the system is firstly established,following which the system is transformed into a closed-loop system with feedback control.On this basis,a new augmented Lyapunov-Krasovskii(LK)functional is established for using the new Bessel-Legendre inequality to estimate the derivative of the functional,which can provide a maximum lower bound.A stability criterion is then derived by employing the LK functional and Bessel-Legendre inequality.Finally,numerical examples are used to demonstrate the validity and superiority of the proposed method.

关 键 词：Power systems time delay systems load frequency control PID control robust stability 

分 类 号：O17[理学—数学]