Assessment of Surface Contamination of High Voltage Insulator Based on Evidence Theory

To overcome the bad performance of surface contamination assessment for the current high voltage insulator, which induced by a lot of uncertainties existing in measurement information and the thing between measurement and assessment result, a novel assessment strategy is proposed based on D-S evidence theory in this paper. Firstly, the D-S reasoning model is established to assess contamination extent on the basis of information or evidence. Secondly, the effective representation for uncertainties is solved by processing obscurely the corresponding measurement information. Afterwards, the uncertain reasoning for assessment result is finished based on fuzzified uncertain information by the proposed novel algorithm for the insulator contamination assessment. Finally, computer simulation example is illustrated to prove the validity of the proposed novel algorithm.