Power grid electric energy quality comprehensive evaluation method based on gray weighting correlation analysis algorithm

Abstract

The invention discloses an electric energy quality comprehensive evaluation method in order to directly evaluate the overall conditions of the electric energy quality in an area more visually so that the electric power supply can be safer and more economical. The comprehensive weight of a comprehensive evaluation index of the electric energy quality is determined with the order relation analysis method and the entropy weight method, then, the coefficient of correlation between an actual measurement value and the standard limiting value at the national standard level is calculated with the gray correlation analysis theory, and finally the index weight coefficient and the correlation coefficient undergo weighting multiplication to calculate the correlation degree of the electric energy quality. The level of the electric energy quality is judged according to the correlation degree of the electric energy quality.

Description

technical field [0001] The invention relates to a comprehensive evaluation of electric power quality of a power grid, belonging to the technical field of electric power system automation, in particular to a comprehensive evaluation method for power quality of a power grid based on a gray weighted correlation analysis algorithm. Background technique [0002] With the vigorous development of my country's circuit industry and the rapid increase of circuit load, nonlinear and impact loads are also increasing. These loads have caused serious pollution to the power quality of the power supply system and reduced the power quality; on the other hand, modern high Automation and intelligent industrial electrical equipment put forward higher requirements for power supply quality, and countries around the world have formulated a series of standards for power quality. Generally speaking, when the various qualities of the power quality of the circuit system are close to the system standard...

AI Technical Summary

Problems solved by technology

Due to the different knowledge levels, abilities, and experiences of experts, the subjective weighting method cannot be carried out on the same benchmark, which affects the accuracy of determining the weight of the evaluation index.

At the same time, the biggest shortcoming of the AHP is that it needs to check the consistency of the judgment matrix, which affects the effectiveness of the comprehensive evaluation of power quality.

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