提高配电网状态估计精度的量测配置优化方法  

Evaluation and optimization of meter placement to enhance distribution state estimation

作　　者：徐臣[1] 余贻鑫[1] 

机构地区：[1]天津大学电力系统仿真控制教育部重点实验室,天津300072

出　　处：《电力自动化设备》2009年第7期17-21,共5页Electric Power Automation Equipment

基　　金：国家重点基础研究发展计划(973计划)资助项目ZDJC25000);天津市科技发展计划项目(09JCZDJC25000);"十一五"国家科技支撑计划重大项目(2006BAJ03A06)~~

摘　　要：为适应配电网的智能化要求,达到提高配电网状态估计精度的目的,应用M-P广义逆矩阵和加权最小二乘问题的唯一极小最小二乘解等数学方法,推导出量测误差和状态向量估计误差之间的数学关系表达式;提出了一种新颖的量测评估和配置优化的方法。利用评估算法对待考察的量测集合进行评估后,从评估结果中选出排序靠前的量测类型和安装位置,从而得到量测装置的配置优化方案。对于算例系统,应用该方法获得的量测配置优化方案,仅需安装少量量测装置就可以提高状态估计精度在60%以上。To improve the accuracy of distribution three- phase state estimation for the smart distribution network,the Moore- Penrose generalized inverse matrix and the only minimal least squares solution of the weighted least squares problem are used to deduce the mathematical relationship between measurement error and state vector estimation error. An evaluation and optimization method of meter placement in distribution network is presented. The measurement sets are evaluated by evaluation algorithms,the evaluation results are sorted by the meter type and installation place,and the optimal meter placement scheme is selected. Case study shows that,with a few measuring devices installed,the state estimation accuracy can be increased more than 60 %.

关 键 词：智能配电网 快速仿真与模拟 三相状态估计 M-P广义逆矩阵 量测配置评估 

分 类 号：TM744[电气工程—电力系统及自动化] O151[理学—数学]