电力系统及其自动化学报2018，Vol.30Issue(4)：114-120,7.DOI:10.3969/j.issn.1003-8930.2018.04.018
电力系统改进时滞依赖型鲁棒稳定判据
Improved Time-delay-dependent Robust Stability Criteria for Power System
摘要
Abstract
Due to the limitation of communication links and the wide range of transportation,time delays arise from the collection and transmission of signals in a wide-area measurement system.In this paper,an improved Lyapunov robust stability criterion for the power system with uncertain time-delays is presented.First,according to the definition of state trajectory,state variables are defined as the sum of linear function and the error function with respect to the linear part in the corresponding integral interval,such that the maximum value of the quadratic integral term in the derivative of Lyapunov functional is obtained.Then,with the combination of the"delay-partitioning"theory,an asymptotic robust stability criterion for the power system with one single time-delay is derived,which is further extended to the power sys?tem with multiple time-delays.Finally,a typical second-order delay system,a single-generator infinite-bus system,and a WSCC 3-generator 9-node system are employed to analyze the maximum delay margin that the time-delay system with uncertainties can sustain.The results demonstrate that by using the proposed method,the conservation of stability crite?ria is improved with acceptable calculation efficiency.关键词
Lyapunov方法/线性矩阵不等式/时滞依赖型/鲁棒稳定判据/电力系统Key words
Lyapunov method/linear matrix inequality/delay-dependent/robust stability criteria/power system分类
信息技术与安全科学引用本文复制引用
李晓萌,贾宏杰..电力系统改进时滞依赖型鲁棒稳定判据[J].电力系统及其自动化学报,2018,30(4):114-120,7.基金项目
国家自然科学基金资助项目(51277128) （51277128）
国家高技术研究发展计划(863计划)资助项目(2015AA050403) （863计划）
