期刊
IEEE TRANSACTIONS ON POWER SYSTEMS
卷 23, 期 4, 页码 1611-1618出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPWRS.2008.2004741
关键词
Gram matrix; minimum norm; observability analysis; observability restoration; state estimation
资金
- State of Sao Paulo Research Foundation-FAPESP-Brazil
This paper presents a numerical method for observability analysis and restoration in power system state estimation based on Gram matrix factorization. A method to identify observable islands based on minimum norm solutions is also presented. The method has the advantage of being easy to implement because all information used for the new formulation can be extracted or adapted from operations that are present in conventional state estimation. The observability analysis and restoration are performed in a single step in which measurements and pseudo-measurements are processed. If the system is nonobservable, minimum norm solutions obtained with nonredundant measurements are used to identify observable islands and, in the sequel, with the results of Gram matrix factorization, a set of nonredundant injection measurements that restore the global observability of the system is obtained. This approach is an alternative to the classical observability analysis and results in methods that are robust and suitable to be used in real-time applications. Numerical examples to show the performance of the methods are presented.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据