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Real-time linear integer programming method for power distribution network section positioning

A technology of segment location and integer programming, applied in the direction of measuring electricity, fault location, measuring electricity variables, etc., it can solve the problems of slow location process and inability to realize real-time location of fault segments, achieve fast segment location speed, realize The effect of real-time positioning and high positioning accuracy

Active Publication Date: 2020-07-14
国网湖北省电力有限公司荆门供电公司 +2
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  • Application Information

AI Technical Summary

Problems solved by technology

Due to the nonlinearity of the model, the positioning process is slow, and the real-time positioning of the fault section cannot be realized

Method used

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  • Real-time linear integer programming method for power distribution network section positioning
  • Real-time linear integer programming method for power distribution network section positioning
  • Real-time linear integer programming method for power distribution network section positioning

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Embodiment Construction

[0043] Take the 19-node distribution network model as an embodiment of the present invention, such as figure 1 As shown, the model contains 19 SFIs, that is, 19 nodes. The nodes are represented by SFI1-SFI19. These nodes divide the distribution network into 19 sections. The sections are represented by SL1-SL19. The ends of the sections SL16 and SL19 are connected Enter distributed power generation DG1 and DG2, and the capacities of DG1 and DG2 are set to 1.65MW and 1.5MW respectively.

[0044] A real-time linear integer programming method for distribution network section positioning, comprising the following steps:

[0045] Step S1: Establish a distribution network topology database, the distribution network topology database includes: the associated set Ω between nodes and sections SFI-SL , the associated set Ω between segments SL and the association set Ω between nodes SFI ;

[0046] Among them, the association set Ω between nodes and segments SFI-SL Contains N subsets ...

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Abstract

The invention discloses a real-time linear integer programming method for power distribution network section positioning. The method comprises the following steps: S1, establishing a power distribution network topology database; S2, establishing a non-linear integer programming model for section positioning according to the power distribution network topology database, wherein the non-linear integer programming model comprises an objective function and constraint conditions, and the objective function is constructed according to the principle of minimum missing report and false report; S3, converting the non-linear integer programming model for section positioning into a linear integer programming model; S4, after a fault occurs, acquiring a fault current of each node by using SFI, and performing state coding on each node according to the maximum load current; S5, inputting the node state into a linear integer programming model, solving the linear integer programming model through CPLEX, and obtaining a fault section codes, missing report codes and false report codes. The method has the advantages that SFI missing report, SFI false report and the fault section are used as decisionvariables together, and therefore when SFI information is incomplete, high positioning accuracy is still achieved.

Description

technical field [0001] The present invention relates to the technical field of distribution network fault location, isolation and power supply recovery, and more specifically relates to the technical field of SFI-based distribution network section positioning method. Background technique [0002] In extreme environments, such as storms, rainstorms, snow disasters, etc., the elasticity of the distribution network is directly related to the reliability of the power supply of the distribution network. In order to improve the resilience of the distribution network in extreme environments, a large number of smart devices such as remote switches, reclosers, and SFIs are used in the distribution network, and these smart devices provide a large amount of monitoring, alarm and measurement data. In order to make better use of these data, the power supply company has installed an advanced distribution management system and a power outage management system in the distribution network op...

Claims

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Application Information

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IPC IPC(8): G01R31/08
CPCG01R31/086G01R31/088Y04S10/52
Inventor 王飞
Owner 国网湖北省电力有限公司荆门供电公司
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