N-1故障状态下电力系统静态电压稳定极限的快速计算  

Rapid Calculation of Power System Static Voltage Stability Limit Under N-1 Fault Condition

作　　者：赵柯宇[1] 吴政球[1] 刘杨华[1] 连欣乐[1] 曾兴嘉[1] 

机构地区：[1]湖南大学电气与信息工程学院,湖南省长沙市410082

出　　处：《电网技术》2008年第17期58-63,共6页Power System Technology

基　　金：湖南省科技厅重点项目(04JT1015)。

摘　　要：为了快速计算电力系统支路故障状态下的静态电压稳定临界点,提出了一种基于泰勒级数的计算方法。以支路导纳系数为参数,通过求解原系统的静态电压稳定临界点对故障支路导纳系数的1至n阶导数,用泰勒级数法逼近电压崩溃点,从而快速求解出N-1故障情况下电压稳定临界点的精确解。采用该方法对IEEE 30及118母线系统进行验证,结果表明该方法能快速、精确地求得故障状态下的静态电压稳定临界点。To calculate the critical point of static voltage stability under faulty branch state of power system rapidly, a Taylor series based calculation approach is proposed. Taking admittance coefficients of branches as parameters and by means of solving the 1st to n-order derivatives of critical point of original system＇s static voltage stability to admittance coefficient of faulty branch, the saddle node bifurcation （SNB） point can be approximated by Taylor series method, the exact solution of voltage stability critical point under N-1 fault condition can be solved rapidly. Using IEEE 30-bus system and IEEE 118-bus system for the cases, the proposed approach is verified. Verification results show that by use of the proposed approach the critical point of static voltage stability under N-1 fault condition can be obtained rapidly and accurately.

关 键 词：电力系统 静态电压稳定 鞍结分岔 牛顿法 故障分析 

分 类 号：TM712[电气工程—电力系统及自动化]