计及零注入节点约束的混合量测分区状态估计方法  

A Mixed Measurement Partition State Estimation Method Taking Zero Injection Node Constraint Into Account

作　　者：常鲜戎[1] 樊瑞[1] 

机构地区：[1]华北电力大学电气与电子工程学院,河北省保定市071003

出　　处：《电网技术》2015年第8期2253-2257,共5页Power System Technology

摘　　要：在WAMS/SCADA混合量测系统下的分区状态估计算法能够综合2系统的特性进行状态估计计算,并且达到较好的估计效果,但是该方法并未考虑到零注入节点约束,不能保证零注入节点注入量严格为零。为此,文章在分区混合估计法的基础上,提出一种计及零注入节点约束的分区估计方法。该方法考虑到WAMS可观测区与WAMS不可观测区内不同的量测性质,在2区域中采用了不同的零注入节点处理办法,使两区域内的零注入节点严格为0;同时针对2量测区域边界零注入节点与两区域均相关而带来的零注入节点处理困难问题进行了专门处理,使边界处零注入节点的注入量保持为0。在IEEE 9、IEEE 39、IEEE 118节点系统中的算例结果表明该方法能够在牺牲较小计算效率的前提下,保证两量测区域内的零注入节点注入量严格为零。The partition state estimation algorithm under WAMS/SCADA mixed measurement system can synthesize the features of the two systems for state estimation and achieve a better estimation result. However, in this method the zero injection node constraint is not taken into account, so that the zero injection at zero injection nodes cannot be strictly ensured. For this reason, based on the mixed partition state estimation method, a partition state estimation method, in which zero injection nodes are taken into account, is proposed. Considering the difference between the measurement property in the observable area of WAMS and that in the unobservable area of WAMS, different processing methods to cope with zero injection nodes are used for the two partitions respectively to strictly ensure the zero injection at zero injection nodes located inside the two areas; meanwhile, the difficulties during the processing of the zero injection node, which locates at the boundary of the two measurement areas and relates to both areas, is coped with especially to make the injected quantity at the zero injection node located at the boundary kept zero. Simulation results of IEEE 9-bus system, IEEE 39-bus system and IEEE 118-bus system show that using the proposed method the zero injection at the zero injection node can be strictly ensured at the cost of smaller effect on computational efficiency.

关 键 词：WAMS SCADA 状态估计 零注入 网络分区 

分 类 号：TM711[电气工程—电力系统及自动化]