保留电压可观节点降阶的系统受扰轨迹快速预测  

Fast Prediction of Perturbed Trajectories Using a Reduced-order Approach of Reserving Voltage-observable Nodes

作　　者：张园园[1] 龚庆武[1] 刘栋[1] 陈道君[1] 帅海燕[1] 

机构地区：[1]武汉大学电气工程学院,湖北省武汉市430072

出　　处：《电力系统自动化》2010年第6期17-21,共5页Automation of Electric Power Systems

摘　　要：为充分利用相量测量单元(PMU)的节点电压和支路电流量测量,提出了保留电压可观节点进行降阶以实现系统轨迹预测的方法。给出了电压可观节点的定义,阐述了准确跟踪系统网络拓扑的方法,在系统受扰后先根据网络拓扑进行节点电压可观性分析以确定保留节点,然后在边界节点引入等效动态元件来反映原系统的动态特性,等效元件的类型由降阶前动态元件的分布情况确定。在得到降阶后系统各元件参数后,引入PMU量测量作为初值,实现多机系统受扰轨迹预测。理论分析和仿真结果表明,所述方法能够取得良好的预测效果。In order to fully utilize the node voltage and line current data of phasor measurement unit （PMU）, a novel algorithm is proposed to predict the perturbed trajectories based on reduced-order approach of reserving voltage-observable nodes. The definition of voltage-observable nodes is presented as well. An accurate method of tracking the network topology is also discussed. Firstly the voltage observability of nodes is analyzed to select the reserved ones according to the perturbed system network topology, then the equivalent dynamic components on the boundary nodes are introduced to reflect the dynamic characteristics of the original system. The type of equivalent component is determined by distribution of dynamic components before order reduction. After all the system components＇ parameters are acquired, the PMU data are set up as initial values to realize the perturbed trajectories prediction. Theoretical analysis and simulations results show that the method proposed can achieve good effect for system perturbed trajectories prediction.

关 键 词：相量测量单元 电压可观节点 降阶导纳矩阵 等效动态元件 参数辨识 轨迹预测 

分 类 号：TM711[电气工程—电力系统及自动化]