Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method based on topology protection of distributing network

A technology of power distribution network and topology protection, applied in the direction of emergency protection circuit devices, electrical components, circuit devices, etc., can solve the problems of large power outage range, extended fault range, long power outage time, etc., to reduce the number of power outages and reduce the power outage area. , the effect of reducing power outage time

Inactive Publication Date: 2011-04-06
NR ELECTRIC CO LTD +1
View PDF3 Cites 41 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The master station (substation) centralized scheme means that the power distribution automation terminal provides overcurrent fault signals to the master station (substation). Make a judgment, and then start the fault isolation operation. This process generally requires staff to confirm, resulting in low efficiency; in addition, this kind of feeder automation scheme must rely on the cooperation of the main station (substation) and the distribution automation terminal.
[0004] Although voltage-time feeder automation can realize localized fault judgment and isolation, it has special requirements for the system grid structure and is mainly applicable to "hand in hand" overhead lines. Reclosing is generally not allowed for cable lines; in addition, switches require It has the function of splitting without voltage, and the switch with this feature can only be manufactured by a very limited number of manufacturers, and the price is relatively expensive compared with ordinary switches; moreover, the accurate location of the fault requires multiple overlaps of the feeder switch in the substation, which has a great impact on the system , the power outage lasts for a long time, and may cause the fault range to expand
[0005] To sum up, the aforementioned commonly used feeder automation schemes must gradually locate and isolate the fault area after the substation feeder switch protection trips and the entire feeder line is blacked out. The power outage range is large, and the judgment and isolation process takes a long time, which needs to be improved.

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
  • Method based on topology protection of distributing network
  • Method based on topology protection of distributing network
  • Method based on topology protection of distributing network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The process and principle of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] The present invention provides a method based on power distribution network topology protection, comprising the following steps:

[0025] (1) A distribution network topology is formed between distribution automation terminals (DTU: distribution terminal unit or FTU: feeder terminal unit). In this embodiment, any distribution automation terminal is designed as a distribution automation terminal only with its adjacent nodes. The terminal constitutes a topology structure, and a horizontal communication link is adopted between each distribution automation terminal and the distribution automation terminal of the adjacent node;

[0026] first as figure 1 As shown, it is a typical grid structure of a power distribution network between substations A and B. For the convenience of description, the following definition...

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 discloses a method based on the topology protection of a distributing network, which comprises the following steps: (1) all distributing automation terminals respectively form a distributing network topology structure, and each distributing automation terminal is linked with adjacent nodes in a lateral communication mode; and (2) whether each switch is an adjacent node is judged based on a line failure criterion; if yes, the network topology protection corresponding to the switch is activated to trip the switch of the node; and otherwise, the network topology protection is not activated, wherein the line failure criterion is as follows: if the switch is not a transformer substation outlet switch and a line overcurrent failure is detected in one and only one of N adjacent nodes, the fact that the switch is a failed adjacent node is judged; and if the switch is a transformer substation outlet switch and a line overcurrent failure is detected in one and only one of N nodes including the transformer substation outlet switch, the fact that the transformer substation outlet switch is a failed adjacent node is judged. The method can rapidly, accurately and selectively position the failure and isolate the failure.

Description

technical field [0001] The invention is used for the troubleshooting method of feeder automation in the field of distribution automation. Background technique [0002] The existing feeder automation schemes that can be applied to actual projects mainly include: master station (substation) centralized scheme, voltage-time scheme. [0003] The master station (substation) centralized scheme means that the distribution automation terminal provides an overcurrent fault signal to the master station (substation). Make a judgment before starting the fault isolation operation. This process generally requires staff to confirm, resulting in low efficiency; in addition, this kind of feeder automation scheme must rely on the cooperation of the main station (substation) and the distribution automation terminal. [0004] Although voltage-time feeder automation can realize localized fault judgment and isolation, it has special requirements for the system grid structure and is mainly applic...

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): H02H7/28H02J13/00
CPCY04S10/20Y02E60/725
Inventor 朱中华王文龙沈全荣程立
Owner NR ELECTRIC CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products