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

An island identification method for distribution network

An identification method and distribution network technology, applied to electrical components, emergency protection circuit devices, fault detection according to conductor type, etc., can solve problems such as lack of solutions, and achieve no impact on power quality, easy implementation, and small blind spots for island detection Effect

Active Publication Date: 2018-12-04
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +2
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] To sum up, in the prior art, there is still a lack of effective solutions to the problem of detection blind spots in the traditional passive island detection technology

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
  • An island identification method for distribution network
  • An island identification method for distribution network
  • An island identification method for distribution network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0075] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0076] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0077] As introduced in the background technology, there is an existing over / under voltage island detection meth...

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 provides an island recognition method of distribution network, which is mainly suitable for the active distribution network adopting the main network with small grounding resistance and using the earth-free distributed power resource. Then the island detection is processed through testing the zero-sequence voltage changes of the grid entry points, also named PPC points, of the distributed power resource. The island recognition method of distribution network has the advantages that the blind zone becomes smaller and the position with the single-phase-to-ground fault can be determined quickly by the island recognition method of distribution network, according to the zero-sequence voltage changes of the PPC points, whether the voltage amplitude of the PPC points is in the preset range or not.

Description

technical field [0001] The invention relates to the technical field of distribution network island detection, in particular to a distribution network island identification method. Background technique [0002] Islanding means that when the power grid is interrupted due to electrical failures, misoperations, etc., the grid-connected power generation system fails to detect the power outage and disconnects from the grid, and continues to supply power to the grid, so that the grid-connected power generation system and the surrounding loads form an unsatisfactory environment. An isolated power generation system with controlled self-sufficiency. Island operation can be divided into planned island and unplanned island. Planned islands can effectively play the positive role of DG, reduce losses caused by power outages, and improve power supply reliability; unplanned islands may cause casualties, cause serious harm to electrical equipment and users, and threaten the safe and stable ...

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): H02H7/28G01R31/08
CPCG01R31/086H02H7/28
Inventor 张林利李立生邵志敏孙勇张世栋李建修王昕刘合金樊迪李玉敦李广磊王青李文杰郭新胜田野
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY