Electric Vehicle Charging Safety Risk Assessment Method Based on Fuzzy Integrated Evaluation
In order to quantitatively assess the safety level in the charging process of electric vehicles,this paper studies the fac-tors that induce charging safety accidents in the charging process of electric vehicles,and designs a safety risk assessment scheme for electric vehicle charging by using a fuzzy comprehensive evaluation method.A comprehensive weighting method is proposed to im-prove the uncertainty of indicator weights in the subjective weighting of grey correlation degree,and ensure the reasonableness and re-liability of the assessment results.Firstly,the frequency of charging accidents induced by indicators is statistically analyzed to obtain the objective weights.Then,subjective weights are obtained by the experience judgement of the experts based on the grey correlation.Finally,the allocation coefficients of subjective and objective weights are derived by the standard deviation.The method retains the subjective suggestions of the experts in the subjective weights,while fully reflecting the objective characteristics of the data itself.Then,the charging safety is divided into five levels and reasonable thresholds are set to construct a trapezoidal distribution on the af-filiation function.After analyzing the charging data of a certain charging station,the feasibility and correctness of this risk assessment method is verified.
万方数据
维普
