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Power distribution network fault positioning method based on whale optimization algorithm improved by multiple strategies

A technology of distribution network fault and location method, applied in the directions of calculation, calculation model, instrument, etc., can solve the problems of low accuracy of whale optimization algorithm, easy to fall into local optimum, and decrease of accuracy, and achieve strong global search ability. , improve the optimization performance, the effect of high accuracy

Pending Publication Date: 2022-04-12
FUJIAN UNIV OF TECH
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Problems solved by technology

[0004] The present invention aims at the problem that the accuracy of the traditional intelligent optimization algorithm in the location of the fault section of the distribution network decreases significantly with the expansion of the distribution network scale, and the traditional whale optimization algorithm has the disadvantages that the solution accuracy is not high and it is easy to fall into a local optimum, and provides A distribution network fault location method based on multi-strategy improved whale optimization algorithm

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  • Power distribution network fault positioning method based on whale optimization algorithm improved by multiple strategies
  • Power distribution network fault positioning method based on whale optimization algorithm improved by multiple strategies
  • Power distribution network fault positioning method based on whale optimization algorithm improved by multiple strategies

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[0088] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0089] Such as Figure 1 to Figure 16 As shown in one of them, the present invention discloses a distribution network fault location method based on a multi-strategy improved whale optimization algorithm, which includes the following steps:

[0090] Step S1: Establish a distribution network model including distributed generation (DG);

[0091] Step S2: Write the fault feature vector based on the set section state, and simulate the FTU to upload the fault information to the distribution network model, that is, input the expected value of the switch node;

[0092] Step S3: Set the population size N, the solution dimension D, and the maximum number of iterati...

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Abstract

The invention discloses a power distribution network fault positioning method based on a multi-strategy improved whale optimization algorithm, and the method comprises the steps: introducing a Sine chaos theory in the initial stage of the algorithm to generate an initial population, increasing the population diversity, and laying a foundation for the global search of the algorithm; secondly, a new self-adaptive inertia weight is introduced into a whale individual position updating formula, and the optimization performance of the algorithm is further improved; and finally, the differential mutation algorithm is fused, so that the speed and the precision of the whale optimization algorithm are improved. The overall improved whale optimization algorithm is higher in global search capability, higher in convergence speed and higher in accuracy. According to the power distribution network fault section positioning method based on the multi-strategy improved whale optimization algorithm provided by the invention, fault positioning can be rapidly carried out when single-point faults and multi-point faults occur in the power distribution network containing DG and fault information uploaded by FTU is distorted or lost, and the accuracy is extremely high.

Description

technical field [0001] The invention relates to the technical field of power distribution, in particular to a method for fault location of a distribution network based on a multi-strategy improved whale optimization algorithm. Background technique [0002] At present, there are three main types of fault location algorithms in the field of distribution network fault location: (1) The active method is mainly by injecting signals into the system or changing the relevant parameters of the system, and then according to some fault characteristics after the system fault Perform fault location. Disadvantages: The injection method in this method requires additional signal injection equipment, which increases the cost; when the neutral point is grounded through high resistance, the injected signal will be shunted by the ground capacitance, which will cause positioning errors. (2) The passive method mainly includes two fault location methods based on transient signals and steady-state...

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Application Information

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IPC IPC(8): G06N3/00G06Q10/00G06Q10/04G06Q50/06
Inventor 刘丽桑张荣升
Owner FUJIAN UNIV OF TECH
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