Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Fault diagnosis method of power distribution network

A technology of distribution network fault and diagnosis method, which is applied in the field of power grid, can solve problems such as high work intensity, delayed repair time, and influence on power supply reliability, so as to improve reliability and work efficiency, reduce maintenance outage time, and reduce manual setting. Check the effect of the project

Inactive Publication Date: 2017-05-10
合肥普望电子有限责任公司
View PDF7 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a fault occurs in a certain section of the distribution line, it is necessary to check the location of the fault one by one. Not only is the work intensity high, but it will also delay the repair time and affect the reliability of power supply. The normal use and service life of power grid terminal equipment such as meters have a great impact
At present, the grid voltage fluctuates greatly, especially in rural areas, the grid voltage fluctuates even more; too high grid voltage often shortens the service life of grid terminal equipment, and sometimes even causes grid terminal equipment to burn out; and too low The grid voltage may cause the grid terminal equipment to fail to work normally
The current detection system and its detection method can only roughly detect the fault range, and cannot timely and effectively confirm and analyze the fault cause and fault point.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] A distribution network fault diagnosis method, comprising the following steps:

[0017] S1: Obtain equipment status information and switch action information. The equipment status information includes output current information, output voltage information, signal reception information and signal generation information. The switch action information includes switch-on information, switch-off information, live information and power-off information information.

[0018] S2: Collect the current on the primary side of the transmission line, including the AC current and zero-sequence current on the primary side;

[0019] S3: Compare the collected AC current value and zero-sequence current value with the preset short-circuit fault current threshold and grounding fault current threshold, respectively. If the sampled AC current value reaches or exceeds the short-circuit fault current threshold, or when the sampling When the zero-sequence current value exceeds the ground fault c...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a fault diagnosis method of a power distribution network. The method comprises the following steps that equipment state information and switch motion information are obtained; currents, including an AC current and a zero-sequence current, of the primary side of a power transmission line are collected; the collected AC current value and zero-sequence value are compared with a preset short-circuit fault current threshold and a preset grounding fault current threshold respectively to determine present fault information; the processed equipment state information is compared with preset threshold information of a distribution terminal, and if the processed equipment state information is beyond a set range, it is determined that equipment has a fault; and the obtained switch motion information is compared with present power supply information of the power distribution network, and if the switch motion information at present is inconsistent with the power supply information, it is determined that a switch has a fault. Thus, a fault reason can be found, a fault point can be located accurately, power failure time for maintenance is reduced, the equipment utilization rate and the operational reliability are improved, and the maintenance cost is reduced.

Description

technical field [0001] The invention relates to the technical field of power grids, in particular to a method for diagnosing faults in a distribution network, a method for diagnosing faults in a distribution network. Background technique [0002] my country's distribution network has the characteristics of complex line structure, diverse and changeable environment, frequent and complex faults, and heavy maintenance workload. When a fault occurs in a certain section of the distribution line, it is necessary to check the fault location section by section. Not only is the work intensive, but also the repair time will be delayed and the reliability of power supply will be affected. The normal use and service life of power grid terminal equipment such as meters have a great impact. At present, the grid voltage fluctuates greatly, especially in rural areas, and the grid voltage fluctuates even more; too high grid voltage often shortens the service life of grid terminal equipment,...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCG01R31/086
Inventor 顾孙珺孙平陆华俊孙国庆
Owner 合肥普望电子有限责任公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products