Comprehensive electric energy quality estimation method based on improved radar graph

Abstract

The invention provides a comprehensive electric energy quality estimation method based on an improved radar graph. All indexes are sequenced by using a weight value to be reflected to the map graph that vector-shaped regions are sequenced according to the sizes of areas; the index with the large weight has great influence on the whole graph image; mutual influences of the two indexes are greater than those of the indexes with smaller weight, so that the problem that a graph area and a perimeter are uncertain due to index sequencing is solved, and the influence of a sequencing result on an estimation result accords with an objective reality; diagonal lines of the vector-shaped regions are used as index shafts and each index corresponds to the independent vector-shaped region, so that the problem that two indexes share the same vector-shaped region is solved and the weight of the indexes can be objectively represented; estimation points of the index shafts are directly connected and the two indexes are combined by respectively utilizing respective half vector-shaped regions in estimation; the graph reflects the influences of the indexes on the whole estimation result; and the comprehensive electric energy quality estimation method further comprises the mutual effect of the indexes, can avoid splitting of the indexes and shows the mutual influences of the indexes.

Description

technical field [0001] The invention relates to the technical field of power quality monitoring and state evaluation, in particular to a comprehensive power quality evaluation method based on an improved radar chart. Background technique [0002] Power quality refers to the quality of AC or DC power supplied to electrical equipment or user terminals through the grid. The voltage, current or frequency deviation that causes the user's power equipment to not work normally, and any power problem that causes the failure or wrong action of the electrical equipment is a power quality problem. [0003] It is very necessary to study the power quality problems of the power grid, establish a power quality monitoring and analysis system, obtain power quality information of the power grid in a timely and accurate manner, and monitor and evaluate it correctly. The development of the power quality monitoring system has very important economic significance for improving the power supply qu...

AI Technical Summary

Problems solved by technology

For example, for the same evaluation object and the same indicator system, if the indicators are arranged in different order when drawing the radar chart, the shape of the radar chart will be different; Different importance in the evaluation, it is not easy to accurately reflect the weight information of each indicator, etc.

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