The Application of the DS Proof Theory in the Small Current Grounding Arrangement

Because the characteristic of the small current grounding arrangement phase-to-earth fault is not ob- vious and is easily affected by many factors,so the single route selection cannot adapt many situations of the small current grounding arrangement.The theory of the current compara amplitude compara angle,based on a- nalysis of small waves,the theory of irregularity examination and the energy method,are widely used.The pa- per adopts the method that based on D-S theory's information fusion to the route selection,combined the three methods,and the formed composite criterion,which can raise the accuracy of judgment.The new method con- structs the model of the figure simulation in the MATLAB also,carries on many simulations based on different faults,through the simulation testified the validity and accurate of the proposed method.