Fault indicator and distributed intelligent terminal matched overhead distribution network fault positioning method

A fault indicator and distribution network fault technology, which is applied in the direction of fault location, fault detection according to conductor type, information technology support system, etc., can solve the problems that distributed intelligent terminals cannot be used in large quantities, faults cannot be isolated, and large investment. Achieve the effects of reducing the scope of fault judgment, improving the reliability of power supply, and saving investment

Active Publication Date: 2016-04-27
DALI POWER SUPPLY BUREAU YUNNAN POWER GRID +1
View PDF5 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0026] The centralized control system does not require the outlet circuit breaker to cooperate with reclosing, and will not cause multiple overcurrent impacts on the system. It is applicable to both overhead and cable lines. The disadvantage is that it needs communication channels and distribution network master stations, and the investment Large, mainly suitable for areas with high requirements for power supply quality in cities
[0032] The network protection system can realize the seamless self-healing of cable ring network faults, and is suitable for occasions that have high requirements for power supply quality. The disadvantage is that the investment is relatively large
Since the distributed intelligent terminal cannot be used in large quantities, it can only roughly judge and isolate the fault section, while the fault indicator has no remote control function and cannot isolate the fault, but it can be used to judge the fault branch

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Fault indicator and distributed intelligent terminal matched overhead distribution network fault positioning method
  • Fault indicator and distributed intelligent terminal matched overhead distribution network fault positioning method
  • Fault indicator and distributed intelligent terminal matched overhead distribution network fault positioning method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Example 1: 10kV distribution network, the total length of the trunk line is 3103m, the distance between the first trunk measurement point and the second trunk measurement point is 2334m, and the distance between the second trunk measurement point and the third trunk measurement point is 769m. The branch lines have different lengths and different load capacities, respectively: the load capacity of the 442m long branch is 800kW, the load capacity of the 153m long branch is 400kW, the load capacity of the 286m long branch is 100kW, and the load capacity of the 317m long branch The 100kW, 116m long branch has a load capacity of 400kW, the 161m long branch has a load capacity of 80kW, the 243m long branch has a load capacity of 160kW, and the 190m long branch has a load capacity of 400kW. A total of 3 trunk measurements and 8 branch measurements, namely (2 sections of trunk, 8 branches), the line types are all overhead lines, single-outlet distribution network topology, and t...

Embodiment 2

[0074] Example 2: 10kV distribution network, the total length of the trunk line is 3103m, the distance between the first trunk measurement point and the second trunk measurement point is 2334m, and the distance between the second trunk measurement point and the third trunk measurement point is 769m. The branch lines have different lengths and different load capacities, respectively: the load capacity of the 442m long branch is 800kW, the load capacity of the 153m long branch is 400kW, the load capacity of the 286m long branch is 100kW, and the load capacity of the 317m long branch The 100kW, 116m long branch has a load capacity of 400kW, the 161m long branch has a load capacity of 80kW, the 243m long branch has a load capacity of 160kW, and the 190m long branch has a load capacity of 400kW. A total of 3 trunk measurements and 8 branch measurements, namely (2 sections of trunk, 8 branches), the line types are all overhead lines, single-outlet distribution network topology, and t...

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 indicator and distributed intelligent terminal matched overhead distribution network fault positioning method, and belongs to the technical field of relay protection of power systems. On the premise that overcurrent relay protection of a traditional distribution network is not changed, distributed intelligent terminals are installed on circuit breakers at all trunk section points and fault indicators are installed on all branch circuits, the installation positions of the distributed intelligent terminals are taken as nodes, a relation between the fault indicators and the nodes is defined according to the positions of the nodes and the fault indicators, and trunk units and branch units are divided and numbered to form a unit adjacency list. When faults occur, an automatic reclosing lock recloses transient faults, the distributed intelligent terminals isolate permanent faults, and meanwhile, the distributed intelligent terminals and the fault indicators detect current values and compare maximum branch current values in the relevant unit adjacency list to position trunk faults and branch faults.

Description

technical field [0001] The invention relates to a fault location method for an overhead power distribution network in which a fault indicator and a distributed intelligent terminal cooperate, and belongs to the technical field of electric power system relay protection. Background technique [0002] With the continuous acceleration of my country's economic development, the power supply is also increasing year by year, making the requirements for the safe and reliable operation of urban and rural distribution networks increasingly high. [0003] In actual operation, the distribution network spreads across cities, villages and mountainous areas. It has been affected by lightning, wind, rain and frost for many years, and increasingly severe environmental pollution. Coupled with some unpredictable human factors, the probability of failure is very high. Statistics show that most of the faults in the power grid occur in the distribution network. According to relevant statistics, i...

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
CPCG01R31/086Y04S10/52
Inventor 何国斌黄滇生刘伟张海束洪春董俊林丹丹
Owner DALI POWER SUPPLY BUREAU YUNNAN POWER GRID
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
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap