电力系统自动化2019，Vol.43Issue(4)：166-173,8.DOI:10.7500/AEPS20180603007
基于联络线扩展区域分解协调的分布式并行状态估计
Distributed Parallel State Estimation Based on Decomposition and Coordination of Tie-line Extended Area
摘要
Abstract
In order to adapt to the increasingly complex structure of interconnected power grid and the hierarchical and partitioned management modes, the distributed state estimation calculation for interconnected systems using partition and decoupling by tie-line are adopted.Considering the balance of estimation accuracy and efficiency, this paper proposes a distributed state estimation algorithm combining the state estimation of tie-line extended area and the sensitivity matrix coordination method.The whole idea of the distributed state estimation is designed in two parts.On one hand, the state estimation and the sensitivity matrix solution of each region in the partition layer is independently performed once the interconnected power grid is decoupled by regional tie-lines.Simultaneously, the tie-line estimation area in coordination layer is dynamically constructed and the parallel state estimation calculation is completed.On the other hand, the coordinated correction calculation for the mismatch of boundary estimation value in each sub-region is performed in parallel according to the tie-line estimated values and sensitivity matrixes distributed by the coordination layer.Finally, the calculation examples of the IEEE 118-bus, IEEE 30-bus and an actual interconnected power system show the superiority of the proposed algorithm, in terms of the estimation accuracy, the converging speed and the calculation efficiency.The proposed algorithm avoids the largescale integrated state estimation calculation and solves the bottleneck problems of state estimation of large-scale power system with local observability or convergence issues by performing independent parallel calculation.关键词
状态估计/分布式计算/联络线分区解耦/联络线扩展区域状态估计/灵敏度矩阵Key words
state estimation/distributed computation/partition and decoupling by tie-line/state estimation of tie-line extended area/sensitivity matrix引用本文复制引用
张佳楠,袁启海,余建明,单连飞,周二专,赵林..基于联络线扩展区域分解协调的分布式并行状态估计[J].电力系统自动化,2019,43(4):166-173,8.基金项目
国家电网公司"千人计划"专项资助项目(5206001600A3) （5206001600A3）
