Evaluation method based on voltage reactive power control system in grid system

Abstract

The invention provides an evaluation method based on a voltage reactive power control system in a grid system. Weights are distributed through the utilization of the fuzzy linear transformation theory and the maximum membership degree principle, by taking factors relevant to an evaluated object into consideration and according to the degree of influences of different indexes on the evaluated object, and then reasonable comprehensive evaluation is given. The method includes the steps that firstly, data of the voltage reactive power control system in a grid are acquired; secondly, an index system of a hierarchical model of first level indexes and second level indexes is formulated; thirdly, system running is analyzed and summarized according to running data, analysis data and running state information of all modules, and then running state parameters and the running state of the voltage reactive power control system are acquired, wherein the first level indexes and the second level indexes in the index system serve as analysis and computation objects of the voltage reactive power control system; fourthly, a judgment set of a classification model is determined; fifthly, a comprehensive analysis hierarchical structure is formed through the Delphi method; sixthly, the weights of the indexes are determined; seventhly, comprehensive evaluation of the highest layer A of the comprehensive evaluation index system is computed according to a fuzzy comprehensive evaluation method and model.

Description

technical field [0001] The invention relates to an evaluation method based on a voltage and reactive power control system in a power grid system, and belongs to the technical field of evaluating the operation of a reactive power and voltage control system in a power distribution network. Background technique [0002] Automatic voltage control technology integrates safety, economy and high quality, and can realize global multi-objective optimal closed-loop control. In recent years, it has been highly valued by researchers and operators at home and abroad, and more and more engineering application results have come out. However, it must be admitted that establishing a complete automatic voltage control system is a complex system engineering. Unlike automatic power generation control with a single frequency control standard, different regions of large power grids often have different voltage control requirements. [0003] Among them, the evaluation theory of voltage and reactiv...

AI Technical Summary

Problems solved by technology

However, the classification of importance levels of power grid operation information is difficult to describe directly qualitatively and quantitatively, and is often ambiguous

In addition, in the current evaluation of reactive power and voltage, the determination of the index weight is only based on the professional knowledge and experience of experts to determine the weight coefficient, which lacks the objectivity of the evaluation, and the organic combination of objectivity and subjectivity has not been realized for the system evaluation.

Images