Power quality synthetic evaluation based on improved radar chart

The radar chart method is improved and applied to the synthetic evaluation of power quality.The index weights are ranked,and based on which,the corresponding sector areas are ranked and their angles are distributed.The diagonal of the sector area is taken as the corresponding index axes to draw the radar chart,which reflects both the unattached weight of every index and the influences among each other.The evaluation algorithm is also improved,which applies the area and girth of radar chart to synthetically evaluate the power quality.Verification results show its better applicability.