摘要
在研究非线性系统戴维南动态等效原理的基础上,对电压稳定极限诱导分岔的发生条件和判定方法进行了研究。首先导出了戴维南动态等效阻抗的计算表达式,证明了负荷节点获得极大功率的必要条件。然后对极限诱导分岔的发生条件进行了分析,提出了极限诱导分岔发生的必要条件。最后利用阻抗模裕度指标,提出了一种极限诱导分岔的判定方法。通过对IEEE118节点系统的仿真计算验证了方法的有效性。
In this paper,limit induced bifurcation in voltage stability was studied on the basis of the research of nonlinear Thevenin dynamic equivalent principle.Firstly,the computational expression of Thevenin dynamic equivalence impedance is derived,and the necessary condition for maximum power of load node is proved.Then,the condition of limit induced bifurcation is analyzed,and the necessary condition is proposed.Finally,a method using impedance modulus margin index is proposed to determine limit induced bifurcation.The effectiveness of the proposed methods is demonstrated through the simulation of IEEE 118-bus system.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2014年第6期42-46,共5页
Proceedings of the CSU-EPSA
关键词
电力系统
电压稳定
戴维南动态等效
极限诱导分岔
阻抗模裕度
power system
voltage stability
Thevenin dynamic equivalent
limit induced bifurcation
impedance modulus margin
