电力系统保护与控制2017，Vol.45Issue(24)：44-49,6.DOI:10.7667/PSPC162009
基于改进动态阻抗法的电网静态电压稳定裕度快速评估
Rapid evaluation of power system static voltage stability margin based on improved dynamic impedance
摘要
Abstract
Accurate identification of Thevenin equivalent parameters is the key to realize the power system static stability on-line assessment.It is very difficult to guarantee the assumption that the equivalent parameters are constant between the two moments when the identification method of the two-time power flow is used.Firstly,the existing problems of equivalent parameter identification methods are analyzed,and an improved equivalent parameter identification method based on dynamic equivalent impedance is proposed.The equivalent parameters are calculated on-line quickly from the current operating points and the predicted points.The improved method solves the problem that the original methods are invalid when the load power is constant and the multi-node load power is changed at the same time.On this basis,the static stability margin is evaluated by using the impedance modulus index.Finally,the effectiveness of the proposed method is verified by simulation.关键词
电力系统/静态电压稳定/戴维南等效参数/动态等效阻抗/裕度指标Key words
power system/static voltage stability/Thevenin equivalent parameter/dynamic equivalent impedance/margin index引用本文复制引用
梁辰,刘道伟,焦彦军..基于改进动态阻抗法的电网静态电压稳定裕度快速评估[J].电力系统保护与控制,2017,45(24):44-49,6.基金项目
This work is supported by National Natural Science Foundation of China (No.51207143) and Science and Technology Project of State Grid Corporation of China (No.XT71-15-056).国家自然科学基金项目(51207143) （No.51207143）
国家电网公司科技项目(XT71-15-056) （XT71-15-056）
