摘要
连续潮流法是求取静态电压稳定临界点的重要方法,但该方法具有计算效率低甚至不收敛的问题,负荷的静态特性对系统的静态电压稳定性有着极其重要的影响,为此提出一种考虑负荷静态特性求取电压稳定临界点的泰勒级数等值方法。首先将戴维南等值方法推广到动态分析中,定义系统的动态等值阻抗,用动态分析方法证明了电力系统达到极限传输功率的必要条件。然后考虑负荷的静态特性,将解析复变系统的动态分析方法严格推广到非解析复变系统当中,求出节点电压相量与负荷电流相量关于电流模的泰勒级数,从而求出被观察节点的极限功率与临界电压。仿真结果表明,泰勒级数等值方法能快速准确的求取系统的临界电压和极限传输功率。
Continuation power flow algorithm is a crucial method for calculating the static voltage stability point,but it has matters of low computation efficiency and misconvergence;Load static characteristic has significant effects on static voltage stability of the system,therefore the Taylor series equivalent method for calculating the voltage critical point considering load static characteristics was presented.First,the thevenin equivalent method was promoted to the dynamic analysis and the dynamic equivalent impedance of the system was defined and the necessary condition when power system achieves limit transmission was proved with the dynamic analysis method.Then considering load static characteristic,the dynamic analysis methods of the analytical complex-variable system was promoted to the non-analytical complex-variable system strictly to obtain Taylor series about current mode of the node voltage phasor and load current phasor so that calculate the limit power and critical voltage of the observed node.The simulation results show that Taylor series equivalent method can fastly and accurately calculate the critical voltage and limit transmission power of the system.
作者
谢冬冬
乔波
原哲
刘鑫
XIE Dongdong;QIAO Bo;YUAN Zhe;LIU Xin(Jiaozuo Power Supply Company of State Grid Henan Electric Power Company Jiaozuo 454000,China)
出处
《河北电力技术》
2020年第4期31-34,共4页
Hebei Electric Power
关键词
极限传输功率
临界电压
泰勒级数
负荷静态特性
电压稳定
电流模
limit transmission power
critical voltage
taylor series
load static characteristic
voltage stability
current mode
