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A set of uncertain branches related with each other is defined as an uncertain branch group for grounding grid corrosion diagnosis. The methodology to determine uncertain branch groups is described. It is pointed out that evaluation of uncertain branches can be carried out in uncertain branch groups, respectively. A novel method based on dichotomy to calculate the maximum and minimum resistances of...
To benefit the fault detection and identification of conductor corrosion fault, a hierarchical simplified model of grounding grids is put forward. Minimum unit dividing is the key process of hierarchical simplification, which can be realized by the proposed algorithm. Branches are classified into clear branch and uncertain branch. A Monte-Carlo based testability evaluation approach is suggested. The...
In order to detect the corrosion of grounding grids, a corrosion diagnosis approach based on Tabu search (TS) algorithm is put forward. A grounding grid is excited between couples of touchable nodes by a current source. Some voltages of touchable nodes are measured in each excitation. Minimizing the energy of the error between testing voltages and evaluation voltages is used as the index. The designed...
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