负荷裕度及其与典型参数的灵敏度计算  

Load margin and its sensitivity calculation with typical parameters

作　　者：张晓英[1] 蒋拯[2] 丁宁[1] 李琛[1] 程治状[1] 

机构地区：[1]兰州理工大学电气工程与信息工程学院,甘肃兰州730050 [2]国家电网重庆市电力公司检修分公司,重庆400039

出　　处：《电机与控制学报》2015年第8期28-35,共8页Electric Machines and Control

基　　金：国家自然科学基金(50967001);兰州理工大学优秀青年教师培养资助项目(Q200814)

摘　　要：针对已有的电压稳定指标得到的只是稳定的结果,而对影响系统电压稳定性的关键因素研究不够深入的问题,采用连续潮流算法进行裕度灵敏度分析,根据系统临界点附近的正切向量,并结合右特征向量与右奇异向量推导出电压稳定指标,此指标可用于描述影响系统电压稳定性的关键因素。通过对传输裕度预估计算,得出负荷裕度关于励磁系统参数、网络参数以及负荷参数灵敏度的计算。IEEE-39节点系统仿真结果表明:所提出的负荷裕度关于典型参数的灵敏度计算方法可用于估算系统参数变化情况下的电压稳定裕度、判断出系统电压稳定性敏感节点、选取最合适的无功补偿位置、确定维持电压稳定性的最佳切负荷量。The stable results are obtained through the existed voltage stability,but few studies are related to the key factors affecting the system voltage stability, the margin sensitivity analysis based on Continua-tion Power Flow （ CPF） was performed, and the voltage stability index was derived by the combination of the tangent vector around the critical point and the right eigenvector and the right singular vector. This in-dex was used to describe the critical factors affecting the voltage stability of the system. The calculation of the load margin sensitivity with respect to excitation system parameters, network parameters and load pa-rameters was obtained by estimating the transfer margin. The simulation results on the IEEE-39 bus sys-tem show the proposed calculation method of the load margin sensitivity with respect to the typical param-eter can be used to estimate the voltage stability margin under the system parameters changing situation, determine the system voltage stability sensitive nodes, select the most suitable position of reactive power compensation and determine the best cutting load to maintain voltage stability.

关 键 词：灵敏度分析 正切向量 裕度灵敏度 传输裕度估计 电压稳定 

分 类 号：TM732[电气工程—电力系统及自动化]