Dynamic screening and comprehensive weight setting method for low-voltage transformer area line loss rate analysis indexes

Abstract

The invention discloses a dynamic screening and comprehensive weight setting method for low-voltage transformer area line loss rate analysis indexes, including the following steps of: collecting and summarizing low-voltage transformer area line loss rate analysis indexes, and establishing a first-level index system of a low-voltage transformer area line loss rate; dynamically screening the first-level index system by a principal component analysis, screening out a low-dimensionality second-level index system of the low-voltage transformer area line loss rate, using the low-voltage transformer area line loss rate as a third-level index, and thereby obtaining the dynamic index system, including three levels, of the low-voltage transformer area line loss rate; working out the comprehensive weight of the second-level indexes to the third-level indexes in the dynamic index system by a step analysis-factor analysis method, and assessing the contribution rate of each second-level index to the low-voltage transformer area line loss rate according to the obtain comprehensive weight. According to the dynamic screening and comprehensive weight setting method provided by the invention, on the one hand, a reference base is provided for analyzing the low-voltage transformer area line loss rate by a power supply enterprise; in addition, the contribution rates of the indexes to the line loss rate are assessed, thus being conductive to assisting the power supply enterprise to perform targeted management and transformation to the low-voltage transformer area line loss rate.

Description

technical field [0001] The invention relates to the field of line loss rate analysis in low-voltage station areas of electric power systems, in particular to a method for dynamically screening line loss rate analysis indicators in low-voltage station areas and setting comprehensive weights. Background technique [0002] The low-voltage station area is the end link directly facing the user in the power system, and its line loss rate is directly related to the economic benefits of the power supply company and the user. At this stage, the analysis of the line loss rate of the low-voltage station area has become the key to the power supply company's promotion of energy conservation and emission reduction question. However, the system that affects the line loss rate indicators of low-voltage station areas is huge and complex. For local power supply companies and researchers, there are a large number of low-voltage station areas in the area under their jurisdiction. The line loss...

AI Technical Summary

Problems solved by technology

The existing work on the line loss rate in low-voltage station areas is mainly to collect all indicators and summarize the data one by one. The workload is large and redundant, and it is easily affected by dogma or empiricism

The limitations of the existing analysis methods for line loss rate indicators in low-voltage station areas are as follows: 1) The process of index screening and analysis is subjective and lacks systematic standards; 2) The analysis process of high-dimensional indicators is cumbersome and inefficient. There are common errors and omissions, and it is difficult to conduct a comprehensive and large-scale comprehensive analysis and evaluation of the line loss rate in low-voltage station areas; 3) The decision-making method for index selection is not flexible, and the selected index dimensions are not only constrained by static manual methods, but also Lack of scientificity; 4) For the selected indicators, their representativeness and practical value cannot be determined; 5) The indicator weight of the line loss rate in the low-voltage station area is one-sided, which reduces the accuracy of the calculation results

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