考虑饱和影响的电力系统广域阻尼控制器设计  

Design of wide-area damping controller for power system considering saturation

作　　者：聂永辉 李兵兵 高磊 金国彬[2] 张鹏宇 NIE Yonghui;LI Bingbing;GAO Lei;JIN Guobin;ZHANG Pengyu(Academic Administration Office,Northeast Electric Power University,Jilin 132012,China;College of Electrical Engineering,Northeast Electric Power University,Jilin 132012,China;China Electric Power Research Institute,Beijing 100192,China)

机构地区：[1]东北电力大学教务处,吉林吉林132012 [2]东北电力大学电气工程学院,吉林吉林132012 [3]中国电力科学研究院有限公司,北京100192

出　　处：《电力自动化设备》2020年第9期95-101,共7页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(61973072,51577023);吉林省教育厅“十三五”科学技术研究项目(JJKH20180445KJ)。

摘　　要：广域阻尼控制器是抑制电力系统区间低频振荡的一种有效方法,但实际系统中执行器一般存在饱和现象。为此提出一种抗饱和补偿器设计方法。首先通过引入饱和函数建立考虑执行器饱和的电力系统模型;其次采用现代抗饱和技术,分2步进行抗饱和补偿器设计。第一步不考虑饱和环节,采用鲁棒控制理论对闭环电力系统进行H∞控制器设计,以确保系统的稳定性;第二步针对饱和环节,基于Lyapunov稳定理论提出抗饱和补偿器设计方法,设计抗饱和补偿器进行补偿,以抑制执行器饱和对控制器性能的影响。最后,将该抗饱和控制器应用到2区4机电力系统模型。仿真结果表明,相比不考虑执行器饱和的线性控制器,根据所提方法设计的抗饱和补偿器可以有效抑制饱和环节对线性控制器性能的影响,能够显著提高电力系统对饱和的抑制能力。Wide-area damping controller is an effective method to suppress low-frequency oscillation in power system,but the controllers generally saturate in actual systems.Therefore,a design method of anti-saturation compensator is proposed.Firstly,a model of power system considering actuator saturation is established by introducing saturation function.Secondly,a modern anti-saturation technique is adopted to design the antisaturation compensator in two steps.In the first step,the robust control theory is used to design the H∞controller for closed-loop power system without considering the saturation link,so as to ensure the stability of the system.In the second step,the anti-saturation compensator design method based on the Lyapunov stability theory is proposed for the saturation link,and the anti-saturation compensator is designed to suppress the influence of actuator saturation on controller performance.Finally,the anti-saturation controller is applied to the model of two-area four-machine power system.The simulative results show that compared with the linear controller without considering actuator saturation,the anti-saturation compensator designed by the proposed method can effectively suppress the influence of saturation on the performance of linear con⁃troller,and can significantly improve the ability of power system to suppress saturation.

关 键 词：电力系统 区间低频振荡 广域阻尼控制 H_∞回路成形 抗饱和补偿器 阻尼 

分 类 号：TM712[电气工程—电力系统及自动化]