Comprehensive evaluation method used for loop-opening scheme of electromagnetic looped network

Abstract

The invention provides a comprehensive evaluation method used for a loop-opening scheme of an electromagnetic looped network, and belongs to the technical field of safe operation of electric power systems. The objective of the invention is to provide an electromagnetic looped network loop-opening scheme evaluation method based on a fuzzy AHP when evaluation and ranking are performed on a feasible scheme based on an analytic hierarchy process (AHP). The comprehensive evaluation method comprises steps of construction of a hierarchical structure model; construction of a fuzzy complementation judgment matrix; weight calculation; normalization calculation of index values; and comprehensive ranking of loop-opening schemes. The comprehensive evaluation method comprises steps of identifying indexes which can reflect nature of to-be-evaluated object, wherein the indexes include tide distribution, short-circuit current, N-1 and net losses; determining relations among layers and establishing the hierarchical structure model; then constructing fuzzy complementation judgment matrix, calculating weight and normalizing the index values; and at last determining the comprehensive ranks of the loop-opening schemes. By combining the advantages of the AHP and the fuzzy evaluation method, rationality and systematization of models are ensured and fuzzy properties of subjective judgment, selection and preference of people are fully considered.

Description

technical field [0001] The invention belongs to the technical field of electric power system safe operation. Background technique [0002] With the development of the power system, my country's power grid presents two typical characteristics: one is the rapid development of the power grid, and the problem of excessive short-circuit current is prominent; the other is that there are a large number of electromagnetic ring networks, and the power transmission capacity is limited. The electromagnetic ring network refers to a parallel loop formed by connecting lines of different voltage levels through the electromagnetic loops of the transformers at both ends of the line. The operation mode of the high and low voltage electromagnetic ring network not only increases the difficulty of the operation and management of the power grid, but also brings uncertain factors and serious accident risks to the development of the power grid. In my country's power system, it has become a consens...

AI Technical Summary

Problems solved by technology

However, due to the complexity, ambiguity and uncertainty of the evaluation problem of the electromagnetic ring network solution solution, the application effect of the above-mentioned single evaluation method is not ideal, so there is an urgent need for new methods to be innovatively applied to solve the electromagnetic ring network solution solution solution assessment questions

Images