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

A 10kv busbar harmonic monitoring method based on feeder protection

A technology for harmonic monitoring and feeder protection, applied in spectrum analysis/Fourier analysis, etc., to quantify the level of harmonic pollution, improve safety and reliability, and improve power quality.

Active Publication Date: 2018-01-30
GUANGDONG POWER GRID CO LTD +1
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the feeder protection and harmonic monitoring methods at home and abroad are basically still in the separate stage, and there are few literature reports that combine the two

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 10kv busbar harmonic monitoring method based on feeder protection
  • A 10kv busbar harmonic monitoring method based on feeder protection
  • A 10kv busbar harmonic monitoring method based on feeder protection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0066] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0067] The present invention is based on the 10kV busbar harmonic monitoring method for feeder protection, and the working process is as follows figure 1 As shown, it specifically includes the following steps:

[0068] 1) Data sampling: through the harmonic monitoring device, collect the feeder fundamental voltage, fundamental reactive power, harmonic voltage, and harmonic current;

[0069] 2) Calculation of harmonic impedance: according to the equivalent circuit of harmonics (such as figure 2 ), to calculate the harmonic impedance, the specific method is:

[0070] 2-1) The formula for calculating the fundamental wave impedance on the system side is:

[0071]

[0072] In the formula, U PCC- , Q PCC- Respectively, the voltage and reactive power of the previous calculation of the fundamental impedance of the system side; U PCC+...

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

A 10kV bus harmonic monitoring method based on feeder protection: S1 collects feeder fundamental voltage, fundamental reactive power, harmonic voltage and harmonic current; S2 calculates harmonic impedance; S3 calculates harmonic voltage responsibility T; S4 harmonic The voltage responsibility calculation value is compared with the alarm threshold; S5 abnormal alarm. The present invention organically and rationally combines the feeder protection function and the harmonic monitoring, which can not only utilize the previous functions of the two, but also save the maintenance workload of maintenance personnel and save costs at the same time, thereby improving the efficiency of the power grid system. It is convenient for professionals to carry out targeted governance and improve the safety and stability of power grid operation.

Description

technical field [0001] The invention relates to a 10kV busbar harmonic monitoring method based on feeder protection. Background technique [0002] The feeder refers to the branch connected to any distribution network node, which can be either the feed-in branch or the feed-out branch. The feeder needs to be protected, and there are mature feeder protection devices and methods in the prior art. [0003] Harmonic monitoring refers to the regular or irregular testing of suspected harmonic sources of concern. The existing harmonic monitoring method can be divided into: (1) analog filter; (2) harmonic monitoring method based on the definition of fryze traditional technology; (3) harmonic monitoring method based on Fourier transform; (4) ) Harmonic monitoring method based on instantaneous reactive power theory; (5) Harmonic monitoring method based on neural network; (6) Harmonic monitoring method based on ANN principle; (7) Harmonic monitoring method based on wavelet analysis. ...

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): G01R23/16
Inventor 薛峰谢伟伦李海涛谢培成黄志威李世亨王朝明马春生孙志伟费婷婷
Owner GUANGDONG POWER GRID 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

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com