摘要
在解决电力系统区间低频振荡时存在广域信号延迟问题,对系统稳定运行带来巨大影响。针对此问题,首先建立时滞电力系统降阶数学模型;然后提出一种基于权衡的思想实现广域阻尼控制,通过利用线性矩阵不等式(LMI)工具箱并借助李雅普诺夫时滞稳定性判据求解广域阻尼控制器(WADC)参数,再利用时滞分割间接方法证明系统的稳定性,并对系统阻尼特性进行分析。最后以四机两区模型为例进行仿真,结果表明在约6 s时转子角和有功功率基本趋于稳定,相比其他常用广域阻尼控制器方法有效地改善电力系统阻尼稳定性。
There exists time delay problem in solving the inter-area low-frequency oscillation of power system, which bringssignificant influence on the system stability. In order to solve this problem, a reduced-order mathematical model of power system isfirstly established. And then a tradeoff-based idea is proposed to achieve wide-area damping control. Based on the linear matrixinequality （LMI） toolbox, the Lyapunov time-delay stability criterion is used to acquire the wide-area damping controller （WADC）parameters. And then the system stability is proved by using an indirect method of time-delay segmentation, and the dampingcharacteristics of the power system is analyzed. Finally, simulations are carried out by using the four-machine two-area model. Thesimulation results show that the rotor angle and reactive power tend basically stable in about 6 seconds, and the damping stability ofpower system is improved effectively compared with other conventional WADC methods.
作者
于淼
路昊阳
YU Miao;LU Haoyang(School of Mechanical-Electronic and Automobile Engineering,Beijing University of Civil Engineering and Architecture,Beijing100044,China;School of Electrical Engineering,Computing and Mathematical Sciences,Curtin University,Perth 6845,Australia;Beijing Key Laboratory of Service Performance of Urban Rail Transit Vehicles Beijing University ofCivil Engineering and Architecture,Beijing 100044,China)
出处
《中国电力》
CSCD
北大核心
2018年第12期80-87,共8页
Electric Power
基金
国家自然科学基金项目(基于自适应迭代辨识方法的多干扰环境下电力系统广域阻尼控制研究
51407201)
国家留学基金项目(201709960017)
北京建筑大学市属高校基本科研业务费专项资金资助(考虑通信时滞的风电接入互联城市电网广域阻尼控制研究
X18121)
北京建筑大学研究生创新项目(电力系统广域阻尼控制信号优化选择和控制器设计研究
PG2018085)~~
关键词
广域阻尼控制器
低频振荡
“阻尼-时滞”权衡
多干扰系统
LMI
wide-area damping controller
low frequency oscillation
＂damping-time delay＂ tradeoff
multi- interference system
LMI
