电测与仪表2017，Vol.54Issue(10)：21-25,43,6.
小干扰稳定约束下联络线输送极限在线估计方法研究
Research on the method of on-line estimation of tie line transmission limit under small disturbance stability constraints
摘要
Abstract
Accurate estimation of the transmission power limit of the interval tie line is of great significance for guiding the safe operation of the interconnected power grid.Based on the deep study of Hopf bifurcation theory,an improved Hopf bifurcation index is proposed for evaluating the damping level of the system.The exponential and the state variables have good linear relationship,and easy to calculate and also can truly reflect the relationship between the state variables and the system damping ratio.Based on the random fluctuation data of the power of the interval tie line,the subspace identification stochastic (SSI) identification algorithm is used to identify the state matrix of the active power of the contact line as the state variable.According to the proposed improved Hopf index to evaluate the running state of the contact line,and the limit line estimation of the contact line transport under small disturbance stability constraints is realized.The simulation results show that the proposed method can accurately estimate the transmission limit of the tie line,and has the advantages of simple calculation process and fast calculation speed,which is suitable for the on-line application.关键词
联络线功率极值/电力系统/随机子空间辨识系统算法/Hopf分岔Key words
contact line power extreme value/power system/stochastic subspace identification/Hopf bifurcation分类
信息技术与安全科学引用本文复制引用
李文鑫,蔡国伟,杨德友..小干扰稳定约束下联络线输送极限在线估计方法研究[J].电测与仪表,2017,54(10):21-25,43,6.基金项目
国家自然基金资助项目(51507028 （）
51377017) （）
