Analytic hierarchy process based load fusion modeling method

Abstract

The invention discloses an analytic hierarchy process based load fusion modeling method. The method comprises: acquiring actual measurement data or experimental simulation data of a monitoring point of a power system; establishing an analytic hierarchy structure comprising a target layer, a criterion layer and a scheme layer, wherein the scheme layer comprises two load models which are a load model considering a power distribution network and a load model of a tractive power supply system respectively; identifying model parameters: performing parameter identification on the two models to obtain a power fitting curve with model power changed with voltage; forming a determining matrix according to parameter identification results, wherein the determining matrix represents relative importance degrees among factors in the same level in a matrix form; calculating a weight and a weighted factor of the determining matrix; and calculating a weighted model fitting result, comparing errors, determining whether a fitting error is reduced, and if the fitting error is reduced, outputting the identification parameters, the weighted factor and the power fitting curve of the model. The method further fully considers load randomness and variability factors; and the method is high in fitting precision and reduced in error.

Description

technical field [0001] The invention relates to a load fusion modeling method based on analytic hierarchy process. Background technique [0002] The load model is one of the most important factors that affect the accuracy and reliability of power system digital simulation results. However, due to the difficulty of load modeling itself, power system load modeling has always been an unsolved problem in power system analysis and calculation. Since the development of the power system, many modeling methods have been proposed. The overall measurement and identification method takes the load as a whole, and collects the voltage, frequency, current and phase angle data of the bus through field devices or tests, and then identifies the model parameters. It has the advantages of simplicity and practicality, and it is a feasible way to solve the problem of load modeling. Load characteristic data is an important factor affecting the measured load modeling results. In recent years, wid...

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Problems solved by technology

[0005] Aiming at the inability of a single load model to accurately and effectively simulate the actual power supply system, the present invention uses the AHP to integrate the two models, and proposes a load modeling method based on the AHP

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