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Fault handling method and device for distribution network

A fault handling method and technology of power distribution network, applied in fault location, emergency protection circuit device, fault detection according to conductor type, etc., can solve the problems of high master station requirements, huge system, large investment, etc., and achieve a small amount of information exchange Effect

Active Publication Date: 2018-08-21
上海思源弘瑞自动化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of centralized processing by the master station has high requirements on the master station, and its investment is relatively large
At the same time, the construction of communication channels also requires a large investment
For the distribution network with many monitoring points, the system is huge and complex. Once the main station fails, it will affect the fault handling of the entire distribution network

Method used

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  • Fault handling method and device for distribution network
  • Fault handling method and device for distribution network
  • Fault handling method and device for distribution network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] figure 1 It is a flow chart of a fault handling method for a distribution network provided by Embodiment 1 of the present invention. This embodiment is applicable to the determination of a fault-occurring section in a smart grid line, and a smart grid usually includes multiple power distribution terminals , the sequence vector of each power distribution terminal, this method can be executed by the fault processing device of the distribution network configured at any power distribution terminal, and specifically includes the following steps:

[0045] Step 110, the power distribution terminal determines the upstream and downstream relationship of adjacent power distribution terminals according to the preset current direction, and records it locally in the power distribution terminal.

[0046] Among them, the preset current direction is the selected primary current reference direction, and the selected primary current reference direction is based on the principle that the ...

Embodiment 2

[0057] figure 2 It is a flow chart of a distribution network fault handling method provided by Embodiment 2 of the present invention. The technical solution of this embodiment is further refined on the basis of the above technical solution, wherein step 150 includes:

[0058] Step 210: When the power distribution terminal detects a fault and does not receive downstream fault information reported by an adjacent downstream power distribution terminal within a first preset time, determine that the fault occurs in an adjacent downstream section of the power distribution terminal.

[0059] Among them, when the power distribution terminal determines the section where the fault occurs, if the power distribution terminal does not detect the fault locally, the fault location logic does not start; if the power distribution terminal detects the fault locally, and the adjacent downstream power distribution terminal reports the downstream fault information, it is judged that the fault is ...

Embodiment 3

[0065] image 3 It is a flow chart of a distribution network fault handling method provided by Embodiment 3 of the present invention. The technical solution of this embodiment is further refined on the basis of the above technical solution, wherein, after step 150, it also includes:

[0066] Step 310, when the power distribution terminal is an upstream power distribution terminal adjacent to the section where the fault occurs, control the local switch to trip and block the local switch to reclose.

[0067] Step 320 , the power distribution terminal controls the downstream switch of the adjacent downstream power distribution terminal to trip and block the downstream switch to reclose.

[0068] Among them, when the power distribution terminal is the upstream power distribution terminal adjacent to the fault occurrence section, that is, after determining that the fault occurrence section is the adjacent downstream section of the power distribution terminal, the power distribution...

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Abstract

The invention relates to a fault processing method and device of a power distribution network. The fault processing method of the power distribution network comprises the following steps of determining a relation between upstream and downstream of adjacent power distribution terminals by a power distribution terminal according to a preset current direction, and recording the relation in a local place of the power distribution terminal; monitoring a load current direction in real time by the power distribution terminal; changing the recorded relation between the upstream and the downstream of the power distribution terminal when the load current direction monitored by the power distribution terminal is opposite to the preset current direction; reporting fault information to the adjacent upstream power distribution terminal when a fault is detected by the power distribution terminal; and determining a fault occurrence section by the power distribution terminal according to the local fault information and downstream fault information reported by the adjacent downstream power distribution terminal. By the method, information exchange quantity between the power distribution terminals is small, the relation between the upstream and the downstream of each power distribution terminal can be automatically corrected when a static topology of a primary network rack is changed, and the fault processing method is high in maneuverability.

Description

technical field [0001] Embodiments of the present invention relate to smart grid technology, and in particular to a method and device for handling faults in a power distribution network. Background technique [0002] The country has made it clear that it will comprehensively accelerate the construction of modern distribution networks, accelerate the intelligent upgrading of distribution networks, improve adaptability, and improve the core competitiveness of distribution networks. In this context, when a fault occurs in the distribution network, it is of great significance to quickly locate and isolate the fault, and restore the power supply to the non-faulty area in time for the construction of a smart distribution network. [0003] The existing distribution network fault location adopts the method of centralized processing by the master station. The master station provides a communication interface, collects all switch positions and fault information in the jurisdiction, gr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/26G01R31/08
CPCG01R31/086H02H7/26Y04S10/52
Inventor 陈致远胡道徐李志华曹建营
Owner 上海思源弘瑞自动化有限公司
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