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

Method for determining faults of bus bar of multi-terminal hybrid direct current transmission system

A hybrid DC and confluence bus technology, which is applied in the direction of AC network circuits, circuit devices, power transmission AC networks, etc., can solve the problems of flexible DC equipment damage, severe faults, etc., and achieve strong adaptability, strong resistance to transition resistance, The effect of high reliability

Pending Publication Date: 2019-04-02
CHINA SOUTHERN POWER GRID COMPANY
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The faults of DC busbars are mostly permanent faults, and the faults are severe. If the faults of the busbars cannot be judged in time, it is easy to cause damage to the flexible DC equipment with weak overcurrent capacity of components.

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 for determining faults of bus bar of multi-terminal hybrid direct current transmission system
  • Method for determining faults of bus bar of multi-terminal hybrid direct current transmission system
  • Method for determining faults of bus bar of multi-terminal hybrid direct current transmission system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] The method for judging the failure of the busbar of the multi-terminal hybrid direct current transmission system of the present invention comprises the following steps:

[0027] 1) Construct the corresponding polarity eigenvalues ​​by using the sampling values ​​of the current fault components of each DC branch connected by the busbar of the multi-terminal hybrid DC transmission system;

[0028] 2) Construct the polarity discriminant value by using the polarity eigenvalue, and judge the fault direction corresponding to each DC branch;

[0029] 3) Combining the fault direction judgment results of each DC branch to judge the busbar fault.

[0030] The multi-terminal hybrid direct current transmission system in the step 1), figure 1 It is a schematic diagram of a typical multi-terminal hybrid HVDC transmission system. The sending end adopts the current source converter type converter station, and the receiving end adopts the voltage source converter type converter station...

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 for determining faults of a bus bar of a multi-terminal hybrid direct current transmission system. The method comprises the steps that: the currents of DC branches connected by the bus bar are sampled, and then the current value of each DC branch is used to construct a polarity discriminant value to determine fault directions corresponding to DC branches, and finally determination results of DC branch fault directions are integrated to determine whether the bus bar generates faults or not. The method provided by the invention is not high in the current synchronism requirement and can accurately determine the faults of the bus bar to achieve protection for the bus bar. The method provided by the invention has an important meaning for the stable operation ofthe multi-terminal hybrid direct current transmission system.

Description

technical field [0001] The invention belongs to the technical field of electric power system hybrid direct current transmission, and in particular relates to a method for judging the failure of a busbar of a multi-terminal hybrid direct current transmission system. Background technique [0002] DC transmission is the earliest power transmission method in history. There was no commutation link in the early DC transmission, and the electric energy was directly sent from the DC power source to the DC load, that is, the power generation, transmission and consumption were all in the form of DC. With the rapid development of motors and transformers, especially the characteristics of transformers that can easily convert AC voltage amplitudes, AC transmission and AC grids gradually occupy a dominant position in the power system. With the development of high-voltage and high-power converter equipment and microcomputer control technology, the operation performance and reliability of d...

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): H02J3/36
CPCH02J3/36H02J2203/20Y02E60/60
Inventor 孔飞李捷丁晓兵余江李正红田得良田庆
Owner CHINA SOUTHERN POWER GRID COMPANY
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