电压稳定裕度对线路功率灵敏度求解的新方法  

New Method to Compute the Sensitivity of Loading Margin to Voltage Collapse with Respect to Circuitry Power

作　　者：骆君[1] 吴政球[1] 连欣乐[1] 曾兴嘉[1] 冷贵峰[1] 

机构地区：[1]湖南大学电气与信息工程学院,长沙410082

出　　处：《电力系统及其自动化学报》2010年第4期94-99,共6页Proceedings of the CSU-EPSA

摘　　要：在利用泰勒级数求得电压崩溃点处状态变量和负荷裕度对支路连接参数的1-3阶灵敏度的基础上,提出一种基于支路视在功率灵敏度快速计算线路故障下静态电压稳定临界点的可靠方法。该方法将单条线路视在功率参数化,通过求解原系统的静态电压稳定临界点对线路视在功率参数的1至3阶导数,用泰勒级数法进行逼近,从而快速精确的求解出线路故障情况下电压稳定临界点。求取不同故障各阶导数时,系数矩阵均是同一个矩阵,无需反复形成与分解。该方法能快速地对线路故障按严重程度进行排序,并精确得出故障后电压稳定裕度。该方法的快速与精确通过在IEEE 30及118母线系统上的算例得以验证。Based on 1 to 3 degree derivatives of load parameter and state variables obtained by Taylor＇s series expansion under base network topology,this paper proposes a reliable method to calculate the critical point of static voltage stability under branch outage contingency.Circuitry power being taken as the parameter,the exact solution about the critical point of the system which has a branch outage contingency can be obtained quickly by using Taylor＇s series expansion and calculating 1 to 3 degree derivatives of the original system.The coefficient matrices of different derivatives of the system state variables and the load margin are not changed with the derivative n;It is no necessary for repeated factorization by using the proposed method to obtain the derivatives with different orders.The distinguishing features are the ability to rank all branches in a large-scale power system quickly and to estimate the outage contingency bifurcation values accurately.The feasibility and efficiency of this technique was been tested on IEEE 30 and 118 bus system.

关 键 词：电力系统 静态电压稳定 线路故障 灵敏度分析 支路功率 

分 类 号：TM615[电气工程—电力系统及自动化]