Multi-population genetic algorithm-based power distribution network fault section location algorithm

A distribution network fault, genetic algorithm technology, applied in the field of distribution network fault section location, can solve problems such as difficult to be widely used, no consideration of power switching, poor fault tolerance, etc., to achieve good adaptability, good fault tolerance and Stability, simple effect of algorithm parameter setting

Inactive Publication Date: 2018-10-23
NANJING UNIV OF SCI & TECH
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Problems solved by technology

The matrix algorithm requires high accuracy of fault information and poor fault tolerance, making it difficult to be widely used
Other intelligent algorithms, such as ant colony algorithm, immune algorithm, and genetic algorithm, have sufficient research and have certain faul

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  • Multi-population genetic algorithm-based power distribution network fault section location algorithm
  • Multi-population genetic algorithm-based power distribution network fault section location algorithm
  • Multi-population genetic algorithm-based power distribution network fault section location algorithm

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Embodiment

[0073] A distribution network fault section location method based on multi-population genetic algorithm, comprising the following steps:

[0074] Step 1. Consider the direction problem and encode the fault current of the distribution network with distributed generation through binary coding. The present invention takes image 3 The distribution network shown is taken as an example for simulation analysis. In the figure, S is the system power supply; three distributed power supplies are connected to the distribution network, namely DG1 (Distributed Generation, DG), DG2, and DG3; K1, K2, and K3 are the access switches corresponding to DG; black The dots are section switches, represented by numbers 1 to 23; the line segments between two dots are feeder sections, represented by numbers (1) to (19). Assuming that the direction of the system power supply pointing to the user is the positive direction of the feeder, when the fault current direction is consistent with the positive d...

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Abstract

The invention discloses a multi-population genetic algorithm-based power distribution network fault section location algorithm. The algorithm includes the following steps that: 1) the fault current ofa power distribution network containing distributed power sources is coded with binary codes; 2) on the basis of satisfying the requirements of the multi-power source network, a distributed power source switching coefficient is introduced to represent power source switching, the application of the algorithm to a complex power distribution network is considered, a corresponding switching functionis established; 3) the construction of a fitness function is completed for the fault section location problem of the power distribution network according to a fault current code and the switching function of the power distribution network containing the distributed power sources; and 4) a multi-population genetic algorithm (MPGA) is implemented, so that population initialization, control parametersetting, immigration operator, manual selection operator and convergence condition determination are completed. With the algorithm of the invention adopted, the fault section of the power distribution network can be located accurately. The algorithm is suitable for a complex power distribution network containing distributed power sources, and has certain effectiveness and fault tolerance.

Description

technical field [0001] The invention belongs to the field of pattern recognition, in particular to a method for locating a distribution network fault section based on a multi-population genetic algorithm. Background technique [0002] Quickly locating the fault section is the key to timely isolate the fault and restore the power supply in the non-fault area when a fault occurs in the distribution network. However, traditional fault location methods are only suitable for single-source power distribution networks. As the energy crisis continues to intensify, the green and environmentally friendly distributed power generation technology has been rapidly developed and widely used. With the access of a large number of distributed power sources, the distribution network originally radiated by a single power source has become a complex network with multiple power sources radiated. This leads to the misjudgment of the existing fault zone location methods, and it is necessary to de...

Claims

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 程青青杨烨熊玉倩李国军江晓燕
Owner NANJING UNIV OF SCI & TECH
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