基于改进型IQC算法的时延电力系统控制方法研究  

Research on control method of power system with time-delays based on improved IQC algorithm

作　　者：蔡东升[1] 黄琦[1] 李坚[1] 易建波[1] 胡维昊 滕予非 Cai Dongsheng;Huang Qi;Li Jian;Yi Jianbo;Hu Weihao;Teng Yufei(University of Electronic Science and Technology of China,Chengdu 611731,China;Sichuan Electric Power Test and Research Institute,Chengdu 610072,China)

机构地区：[1]电子科技大学,成都611731 [2]国网四川省电力公司电力科学研究院,成都610072

出　　处：《电测与仪表》2019年第1期15-21,共7页Electrical Measurement & Instrumentation

基　　金：国家重点研发计划(2017YFB0902002)

摘　　要：通信时延会影响广域电力系统的稳定性,是控制系统性能恶化或者失效的重要原因之一。文章首先建立了计及时延的电力系统微分方程模型,提出基于改进型积分二次约束(Integral Quadratic Constraint,IQC)算法的时延电力系统稳定分析与控制方法。相比于传统IQC算法,该方法约束时延电力系统的输入输出,利用IQC和耗散不等式相结合的方法来设计时延反馈控制器,使稳定性判据的保守性更好。文章以IEEE两区域四机系统为例,采用DSATOOLS的TSAT进行仿真,结果表明所提出的方法有效地减小振荡并降低时延对电力系统稳定性的影响。Communication time delay is detrimental to power system stability and a main reason of the performance deterioration or failure for the control systems.This paper starts with modeling of the power system based on time-delay differential algebraic equations.A method based on an improved integral quadratic constraints(IQC)is proposed to guarantee the stability and control of power system with time-delays.Compared with the original IQC method,this method utilizes IQC algorithm to confine the input and output of time-delayed states of power system.Besides,a combination of IQC method and dissipation inequality is proposed to design the IQC controller,thus,the stability criterion is more conservative.A two-area four-machine power system is built to conduct the simulation based on the TSAT software of DSATOOLS.The simulation results indicate that the proposed method can effectively damp the oscillation and weak the impact of time-delay on stability of power system.

关 键 词：时延电力系统 稳定性 时延反馈 二次积分约束 

分 类 号：TM933[电气工程—电力电子与电力传动]