Unlock instant, AI-driven research and patent intelligence for your innovation.

A Method of Fault Isolation in Regional Power Grid Based on Floyd-Warshall Algorithm

A regional power grid, fault isolation technology, applied in the direction of electrical components, circuit devices, emergency protection circuit devices, etc.

Active Publication Date: 2020-07-17
SOUTHWEST JIAOTONG UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to aim at the above-mentioned deficiencies in the prior art, to provide a kind of regional grid fault isolation method based on the Floyd-Warshall algorithm, to solve or improve the above-mentioned problems

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
  • A Method of Fault Isolation in Regional Power Grid Based on Floyd-Warshall Algorithm
  • A Method of Fault Isolation in Regional Power Grid Based on Floyd-Warshall Algorithm
  • A Method of Fault Isolation in Regional Power Grid Based on Floyd-Warshall Algorithm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0138] refer to figure 2 , the main wiring of a typical 220kV substation. In this figure, CB1, CB2, ..., CB19 are circuit breakers; L1, L2, ..., L7 are lines; B1, B2, ..., B8 are bus bars; T1, T2 are transformers, and the above components Corresponding to numbers 1 to 36 respectively.

[0139] when figure 2 When all the circuit breakers and isolating switches are closed, the protected element-circuit breaker adjacency matrix W can be obtained 1 and the circuit breaker adjacency matrix W 2 . Then the corresponding adjacency matrix is ​​corrected according to the real-time status of circuit breakers and disconnectors in the power grid.

[0140] Such as figure 2 The isolating switch between CB2 and B1 and CB5 are both off, then according to formula (11), the protected element-circuit breaker adjacency matrix W 1 middle element r 2,27 ,r 27,2 , r 5,29 , r 29,5 , r 5,30 , r 30,5 The value of is modified from 1 to ∞; according to formula (12), the circuit breaker adja...

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 regional power grid fault isolation method based on the Floyd-Warshall algorithm, which includes constructing an adjacency matrix reflecting the topological structure of the power grid according to the real-time switch state information in the power grid, and searching the real-time adjacency matrix through the Floyd-Warshall algorithm to obtain all connections The distance between each protected component and circuit breaker and multiple shortest paths corresponding to the distance. The smaller the distance, the closer the terminal circuit breaker of the shortest path is to the protected component. For single fault or multiple faults, circuit breaker failure and substation DC power disappear , can correctly find the nearest isolation circuit breaker and execute the corresponding tripping decision. The present invention formulates a flexible tripping strategy from a global perspective, which can effectively adapt to changes in the main wiring form and system operation mode of the power station, and keeps the fault isolation area to a minimum. The present invention constructs a tripping circuit breaker according to the real-time power grid topology before a fault occurs The collection effectively avoids unnecessary fault processing time occupied by the "fault-triggered" tripping circuit breaker search method.

Description

technical field [0001] The invention belongs to the technical field of electric power system relay protection, and in particular relates to a fault isolation method of a regional power grid based on a Floyd-Warshall algorithm. Background technique [0002] The power system is a tightly coupled system, and the dependencies between various system components are strong. When the system fails, in addition to reliably and effectively identifying the fault components, the relay protection system also needs to disconnect the fault part in the system to prevent or limit the destructive effect of the fault. Therefore, the fault isolation system must have the characteristics of fast, safe, sensitive, and strong adaptability, so as to ensure the rapid and effective isolation of system faults. [0003] The existing protection tripping configuration method is a point-to-point direct tripping method, in which a tripping command is sent by a protection system based on local measurement in...

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 Patents(China)
IPC IPC(8): H02H7/26H02H7/28H02H1/00
CPCH02H1/0092H02H7/26H02H7/28
Inventor 童晓阳张广骁
Owner SOUTHWEST JIAOTONG UNIV