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Low-voltage power distribution network transformer area topology identification method and system

A low-voltage distribution network and identification method technology, applied in electrical components, circuit devices, AC network circuits, etc., can solve problems such as signal line crosstalk, avoid interference, reduce implementation costs, and achieve layer-by-layer isolation and iterative search.

Active Publication Date: 2020-04-17
JIANGSU FRONTIER ELECTRIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the technical problem of crosstalk between the signal lines in the low-voltage distribution network topology recognition method based on the power line broadband carrier (HPLC) technology, and proposes a more reliable low-voltage distribution network topology recognition method

Method used

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  • Low-voltage power distribution network transformer area topology identification method and system
  • Low-voltage power distribution network transformer area topology identification method and system
  • Low-voltage power distribution network transformer area topology identification method and system

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Embodiment 1

[0049] Embodiment 1. In this specific embodiment, the system structure of the low-voltage distribution network station area is as follows figure 1 shown, with image 3 It is the flow chart of the method of this embodiment; image 3 A method for identifying the topology of a low-voltage distribution network platform area is shown, including the following steps:

[0050] The first step: by the central node of the station area (ie figure 1 The root node in the station area) sends the center node identification signal of the station area to all nodes in the station area (including nodes A1, B1, C1, A11, A12, B11, B12, C11), and the identification signal of the center node of the station area includes The ID identification and phase sequence identification of the node; the identification signal of the center node of the station area is coupled to the phases A, B and C of the three-phase power supply line synchronously, and each branch node and leaf node in the station area receiv...

Embodiment 2

[0055] Embodiment two, appended Figure 4 It is a flow chart of station area equipment identification in an embodiment of the present invention; a method for identifying a low-voltage distribution network station area topology provided in this embodiment, the method includes the following steps:

[0056] The first step is to realize the time synchronization of the devices in the station area through the HPLC communication unit, and to obtain the zero-crossing time scale of the node through the sampling circuit of each node to detect the zero-crossing detection circuit of the line node voltage;

[0057] The second step is to collect the zero-crossing time scale on the three-phase power supply line of the central node of the station area, and send it to the HPLC power line;

[0058] Each branch node and leaf node collects the zero-crossing time scale on the three-phase power supply line at the local end, and compares the received three-phase zero-crossing time scale of the cent...

Embodiment 4

[0073] Embodiment 4: A low-voltage distribution network platform area topology identification system, the low-voltage distribution network platform area includes a central node, branch nodes and leaf nodes, characterized in that the system includes: a central node set on the central node A node identification signal processing module and a non-central node identification signal processing module arranged at branch nodes and leaf nodes;

[0074] The central node identification signal processing module can be embedded in the central node's station area intelligent terminal during specific implementation, and can also be set separately at the central node, and is used to send stations to all nodes in the station area through three-phase power supply lines A, B and C. The identification signal of the center node of the station area, the identification signal of the center node of the station area includes the ID mark and the phase sequence mark of the center node of the station are...

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Abstract

The invention discloses a low-voltage power distribution network transformer area topology identification method and system. A transformer area center node transmits a center node identification signal to all nodes in the transformer area through three-phase power supply lines A, B and C, and branch nodes and leaf nodes in the transformer area receive and analyze the identification signal; each branch node sends a branch node identification signal to each subordinate node layer by layer, and the subordinate node of the branch node receives and analyzes the identification signal; the branch nodes and the leaf nodes return the ID identifiers and the phase sequence identifiers of the superior nodes obtained through analysis and the identification information of the nodes to the transformer area center node; and the transformer area center node reads and analyzes the information to obtain the topological structure of the low-voltage transformer area. According to the method, the identification signals are synchronously coupled to the phases A, B and C of the three-phase power supply line, crosstalk between the phase lines caused by single-phase transmission of the topology identification signals in the prior art is avoided; meanwhile, the topology identification efficiency of the low-voltage transformer area is improved by simultaneous transmission of the identification signals inthe three phases.

Description

technical field [0001] The invention relates to the field of low-voltage distribution, in particular to a method and system for identifying the topology of a low-voltage distribution network platform area. Background technique [0002] The automatic identification of the topological relationship of the low-voltage line in the distribution station area is essentially to reliably obtain the connection relationship between the electrical equipment directly connected to the low-voltage line and the low-voltage outlet cabinet in the station area. The power grid company is vigorously carrying out the construction of the power Internet of Things. The electrical network topology of the distribution station area is very important for the power company to improve the management level of power supply reliability and improve the fault location of power supply lines. Due to the large number of distribution stations and complex electrical wiring, there is still the phenomenon of private c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
CPCH02J3/00
Inventor 严永辉李新家熊政喻伟王黎明刘飞赵勇徐博徐明珠廖贺吴甲杨颖帅率陆嘉玮
Owner JIANGSU FRONTIER ELECTRIC TECH
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