Software Development Of Grounding Grid Corrosion Diagnosis Based On Block Model

In order to solve the problem of corrosion diagnosis of grounding grids, a softwaresub-modules of block modeling diagnosis of grounding grids is optimized and designed basedon the block model on the platform of Matalab.The developed software consists of eight blocks, such as: the input and configurationmodule, the topology conversion module, the structural testability evaluation module, theblock topology conversion module, the layer traced and fault diagnosis module, the statetestability evaluation module, the possible ranges evaluation for uncertain branches moduleand the data output display module. Combining above modules artificially, two new processesmay be formed to meet various requirements of grounding grids block diagnosis.The programming of automatically establishment of quasi-blocks, blocks, determine theblock kind, determine the autonomy unit, determine the set of considered intrinsic branches isdetailed. The programming of the intrinsic grounding grid to actual grounding grid by layertraced, the clear branch resistances diagnosis, the uncertain branch groups dividing, thepossible ranges evaluation for uncertain branches based on dichotomy are described. Theprogramming of combining the state testability analysis and testability value judgments basedon block model to solve clear branches fault diagnosis are described. The input and outputdata structures are given. The relationship of the modules and the way to use the modules arealso described.The designed software is tested on the example grounding grids with twenty-ninebranches and sixty branches, respectively. The results show that the designed software canwork out the models of the blocks of the grounding grids correctly and that it can obtain theresistances of clear branches and the possible ranges evaluation for uncertain branches. The designed software is feasible and a useful tool for grounding grids corrosion diagnosis.