DC distribution network system, fault location method and fault location system

A DC distribution network and fault location technology, which is applied to fault locations, information technology support systems, and fault detection according to conductor types, can solve problems such as failure to achieve reliable fault location

Inactive Publication Date: 2019-10-08
XUCHANG XJ SOFTWARE TECH +2
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a fault location method for DC distribution network to solve the problem that the existing fault location method cannot achieve reliable fault location after a fault occurs in the DC distribution network
The present invention also provides a DC distribution network fault location system, which is used to solve the problem that the existing

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  • DC distribution network system, fault location method and fault location system
  • DC distribution network system, fault location method and fault location system
  • DC distribution network system, fault location method and fault location system

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Embodiment Construction

[0025] Embodiment of DC distribution network system:

[0026] This embodiment provides a DC distribution network system, including a DC distribution network topology and a fault location system. In this embodiment, the topology of the medium and low voltage DC distribution network is taken as an example. In order to realize the function of the fault location system, the topology of the medium and low voltage DC distribution network needs to include at least two branches. The number and type of branches need to be set according to actual needs. As a specific implementation, figure 1 A specific topology structure of medium and low voltage DC distribution network topology is given, such as figure 1 As shown, there are three buses involved in the topology of the medium and low voltage DC distribution network, which are I bus, II bus and III bus. (loads, distributed power generation systems, energy storage equipment, etc.), one of which is connected to the II bus, and one branch...

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Abstract

The invention relates to a DC distribution network system, a fault location method and a fault location system. Whether a fault occurs in a DC distribution network is determined; if so, an actual voltage of a corresponding branch is detected; when the detected actual voltage is lower than a low voltage threshold, a protection alarm signal is generated; after delaying of first set time, the protection alarm signal is uploaded; and then the protection alarm signal is parsed and whether the fault point is located at the branch is determined according to the protection alarm signals at the branchand upper-level and lower-level branches of the branch. With the fault location method, reliable positioning of faults can be realized and the power supply reliability of the DC distribution network can be improved. Moreover, appropriate selecting is performed by the first set time; the fault can be quickly positioned; and thus quick action of the subsequent protection trip action is ensured.

Description

technical field [0001] The invention relates to a DC distribution network system, a fault location method and a fault location system, and belongs to the technical field of relay protection for power system distribution networks. Background technique [0002] Compared with the AC distribution network, the DC distribution network, especially the medium and low voltage DC distribution network, has a series of advantages such as large power supply capacity, good power quality, high reliability, and easy distributed energy access, and has a good development prospect. . However, after a fault occurs in the DC distribution network, the existing fault location methods cannot achieve reliable location of the fault. Contents of the invention [0003] The purpose of the present invention is to provide a fault location method for a DC distribution network, which is used to solve the problem that the existing fault location method cannot achieve reliable fault location after a fault ...

Claims

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Application Information

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IPC IPC(8): G01R31/08
CPCG01R31/086Y04S10/52
Inventor 常彦彦孟乐李俊刚黄利军刘洋郝威吴水兰孙文龙郭晓宁赵呈轩李鹤
Owner XUCHANG XJ SOFTWARE TECH
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