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

A Fast Busbar Protection Method Based on Mean Product of Fault Components

A fault component and busbar protection technology, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve the problems of not being fully economical and practical, the influence of wave impedance measurement, and high sampling frequency, and achieve fast action speed, easy engineering implementation, and high sensitivity Effect

Active Publication Date: 2017-06-27
SHANDONG UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has high reliability and strong adaptability, but the sampling frequency is high and the bus structure has a certain influence on the measured wave impedance
[0012] It can be seen that the existing research on busbar protection does not have a completely economical and practical method with fast action speed and high sensitivity

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 Fast Busbar Protection Method Based on Mean Product of Fault Components
  • A Fast Busbar Protection Method Based on Mean Product of Fault Components
  • A Fast Busbar Protection Method Based on Mean Product of Fault Components

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0062] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0063] Such as Figure 6 As shown, a fast busbar protection method based on the mean product of fault components includes the following steps:

[0064] (1) Real-time collection of the voltage and current at each outlet busbar protection element connected to the busbar;

[0065] (2) After filtering, phase-mode conversion is performed on the power frequency fault component voltage and current, and the respective line-mode components are extracted;

[0066] (3) Calculate the product of the mean value of the line-mode voltage and the mean value of the line-mode current; use the positive and negative values ​​of the mean product as the basis for judging forward faults and reverse faults; use the results of fault direction discrimination of all outgoing lines as the basis for judging whether the bus is faulty:

[0067] A: If the sign of the mean modulus pro...

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 rapid bus protection method based on a fault component mean value product. The rapid bus protection method particularly includes the steps of (1) collecting the voltages and the currents at the positions, where bus protection elements are located, of outgoing lines connected with a bus in real time; (2) conducting phase-mode transformation on the voltages and the currents of fault components, and extracting respective line mode components; (3) calculating the product of mean values of the line mode voltages and the line mode currents, wherein the plus or the minus of the product of the mean values serves as a basis for judging forward faults and backward faults, a judging result of the fault directions of all outgoing lines serves as a basis for judging whether the bus breaks down or not. According to the rapid bus protection method, the phase-mode transformation is adopted, a bus protection criteria is constructed through the characteristic of the product of the mean values of the line mode voltages of the fault components and the line mode currents of the fault components, and the rapid bus protection method has the advantages of being easy and convenient to use, high in sensitivity, high in motion speed and accurate in recognition, and enabling engineering to be easily realized.

Description

technical field [0001] The invention relates to a fast busbar protection method based on the mean product of fault components. Background technique [0002] Building a clean, safe, self-healing, economical, high-quality and interactive strong smart grid is the development direction and inevitable trend of grid automation technology. As the key support point of the smart grid and the node of the power network, the substation undertakes functions such as connecting lines, transmitting electric energy, changing voltage levels, collecting current, distributing current, controlling the flow of electric energy, and adjusting voltage. Therefore, the safe and reliable operation of the power grid largely depends on the reliability of substation equipment and systems. As one of the important components of the power system, the substation busbar connecting generators, transformers, transmission lines and loads is the hub of power transmission and distribution in the power system. If ...

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): H02H7/26
Inventor 邹贵彬宋圣兰
Owner SHANDONG UNIV
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