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Propagation matrix modulus optimization fitting method and system based on differential evolution algorithm

A differential evolution algorithm and propagation matrix technology, applied in the field of power transmission, can solve the problem of consuming a lot of time

Active Publication Date: 2020-06-09
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0009] The problem is that, for a given target fitting accuracy, a fitting method with incremental number of poles usually consumes a lot of time trying different numbers of poles one by one

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  • Propagation matrix modulus optimization fitting method and system based on differential evolution algorithm
  • Propagation matrix modulus optimization fitting method and system based on differential evolution algorithm
  • Propagation matrix modulus optimization fitting method and system based on differential evolution algorithm

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Embodiment Construction

[0082] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0083] The purpose of the present invention is to provide a method and system for optimal fitting of the propagation matrix modulus based on the differential evolution algorithm. The differential evolution algorithm is introduced to determine the optimal fitting parameters, which are the number of poles and the delay time, and the corresponding fitting parameters are obtained. fit model.

[0084] In order to make the above objects, features and advantages of t...

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Abstract

The invention relates to a propagation matrix modulus optimization fitting method and system based on a differential evolution algorithm. The propagation matrix modulus optimization fitting method comprises the steps of: determining target fitting precision tol and a fitting frequency range; determining a pole number range; determining the range of the delay [tau]; determining the maximum value ofa delay coding vector based on the range of the delay [tau]; determining the maximum value of a pole number encoding vector based on the range of the pole number; determining the number of solutionsto be N; initializing related parameters in an iteration process; performing iterative computation based on the related parameters; reading the solution x* with the minimum [delta] in the group to obtain the number and delay of poles contained in the solution x*, and executing the above steps to obtain a new pole; and fitting the modulus of the propagation function matrix by using a vector fittingtechnology according to the pole number, the time delay and the new pole obtained in the previous step, calculating a fitting error, and outputting a fitting result and the fitting error. According to the method, the differential evolution algorithm is introduced, the nonlinear optimization problem can be well solved, and the efficiency is improved.

Description

technical field [0001] The invention relates to the field of electric power transmission, in particular to a method and system for optimizing and fitting a propagation matrix modulus based on a differential evolution algorithm. Background technique [0002] Power transmission lines are important power transmission equipment. In the power system, except for electrical equipment and power plants, the rest are all power grids composed of transmission lines, so transmission lines play an irreplaceable role in the power system. The frequency range of the overvoltage caused by power equipment failure, lightning strike or improper operation is much larger than the frequency range of the normal operation of the system, and contains a large number of high-frequency components. Therefore, in the transient calculation, a traveling wave model is established for the power transmission line. The traveling wave model regards the change of voltage and current on the power transmission lin...

Claims

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Application Information

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IPC IPC(8): G06F17/16G06N3/12
CPCG06F17/16G06N3/126
Inventor 葛青宇焦重庆
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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