一种识别闭合开关元件信息错误的状态估计方法  

State Estimation Algorithm with Identification of Closed Breakers Information

作　　者：陈芳[1,2] 韩学山[1] 康凯 

机构地区：[1]山东大学电气工程学院,山东省济南市250061 [2]济南大学控制科学与工程学院,山东省济南市250022 [3]山东省烟台供电公司,山东省烟台市264001

出　　处：《电力系统自动化》2011年第1期50-54,共5页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(50677036)~~

摘　　要：广义状态估计中,为识别闭合开关元件连通片信息错误,提出虚拟开关元件概念,并以此构建不影响识别结果的最小特征电网;在模拟量测方程基础上,补充虚拟开关元件的两端电压相等约束条件,由此建立具有等式约束的最小二乘数学模型。在此基础上,给出基于概率的量测残差和拉格朗日乘子间关联的规律以及识别的准则,论证了正常情况下开关元件信息错误的识别与模拟量不良数据的识别之间互不混淆。最后,以3节点简单电力系统与烟台实际电网为例进行了计算和分析,验证了模型和算法的有效性。In generalized state estimation, to identify the misinformation of the connected region formed by the closed breakers, the concept of virtual breakers is used to build the minimum feature network based on the generalized network that does not affect the quality .of identification. In addition to analog measurements, zero-voltage drop for virtual closed switch as equality constraint is added to formulate the model of weighted least squares with equality constraints. The relation between residual and Lagrange multiplier from the probability standpoint is discussed alongside the approach to identifying bad data. Furthermore, it can be seen that the identification of the bad analog data is distinguished from that of the bad breaker status under normal conditions. Finally, the validity of the model and algorithm is verified with a three-node simple system and the data from Yantai grid of Shandong Province.

关 键 词：广义状态估计 开关元件 拓扑错误识别 电力系统 

分 类 号：TM76[电气工程—电力系统及自动化]