Off-line validation of power network branch parameters

Straightforward, efficient, offline methods for dealing with suspicious power network branch parameters are proposed. State estimation (SE) is the natural tool for tackling the parameter estimation problem. The proposed methods explore the concept of irrelevant/barely relevant branches to eliminate/mitigate temporarily the participation of suspicious parameters in the SE process, until the suspicions are remedied. Strategies are built to handle different situations, such as occurrence of single or multiple network parameter errors and redundancy reduction of available measurements. Suspicious parameter values can be corrected through procedures which interact with an existing conventional state estimator. This is achieved according to different strategies, depending on the situations previously described. Results with the IEEE-14 bus test system illustrate the application of the proposed methodology.