A New Algorithm for the Grounding Grids Corrosion Diagnosis with Deletion of Redundant Constraints

Abstract

When the method of shifting the positions of the exciters among the touchble nodes and measuring as much as possible for each excitation is used, the diagnosis model contains a large number of redundant constraints. For the problem, we make the first-order linear to the constraint conditions and build up test matrix MïŒ . In this paper, a special method is designed to find the maximal linear independent group of the matrix MïŒ row vector group. Using them, we can obtain the equations that are to be retained and the corresponding excitation positions 1 ï— of the equations. We also remove the items with indexs out of 1 ï— to simplify the objective function. In order to find the solution of the simplified model, stepwise iteration algorithm is used. The specific steps of the algorithm are given. The simulation results show that the algorithm can successfully detect the large corrosion slip.