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

Transformer impedance varying method and device

A transformer and variable impedance technology, which is applied in the field of transformer variable impedance, can solve the problems of long maintenance cycle, increased system loss, high maintenance cost, etc., and achieve the effect of accurate and fast switching and solving energy problems

Pending Publication Date: 2019-11-22
WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Returning the transformer to the factory for overhaul can improve the short-circuit impact tolerance level of the transformer to a certain extent, but the maintenance cost is high and the maintenance cycle is long
Although the existing external current-limiting reactor can suppress the short-circuit current, it increases the loss of the system and is uneconomical

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
  • Transformer impedance varying method and device
  • Transformer impedance varying method and device
  • Transformer impedance varying method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0069] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0070] Such as figure 1 As shown, the method for transformer variable impedance of the present invention comprises the following steps:

[0071] 101. After the breaking module 1 and the current limiting module 2 are connected in parallel, they are connected in series to the incoming line of the high voltage side of the transformer;

[0072] 102. When the current mutual induction module 8 determines that the transformer circuit is short-circuited, the breaking module 1 is disconnected, so that the current limiting module 2 cooperates with the transformer winding to complete the short-circuit current limitation;

[0073] 103. When the current mutual sensing module 8 determines that the transformer circuit is normal, the ...

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 relates to the technical field of transformer line equipment, in particular to a transformer impedance varying method and device. The method comprises the steps: enabling an on-off module and a current limiting module to be connected in parallel, and then to be connected to a high-voltage side incoming line of a transformer in series; when a current mutual inductance module judges that the transformer line is short-circuited, disconnecting the on-off module so that the current limiting module is matched with the transformer winding to complete short-circuit current limiting; andwhen the current mutual inductance module judges that the transformer line is normal, closing the on-off module so that the current limiting module is short-circuited. According to the method and thedevice, short-circuit current can be suppressed, and loss of the transformer line is not increased.

Description

technical field [0001] The invention relates to the technical field of transformer line equipment, and more specifically, to a method and a device for changing impedance of a transformer. Background technique [0002] The power transformer is one of the important power transmission and transformation equipment in the power system. It connects multiple voltage levels and plays a pivotal role in the power grid. The safety and reliability of its operation directly affects the operation safety of the power grid, and improving the operation reliability of the transformer is of great significance to the safe and reliable operation of the entire power grid. However, with the increasing scale of the power grid, the short-circuit capacity and short-circuit current are also increasing, so there are more and more transformer damage accidents caused by the impact of short-circuit fault current, which seriously threatens the safe operation of transformers. It is necessary to improve the...

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
IPC IPC(8): H02H9/02H02H7/04
CPCH02H9/021H02H7/04
Inventor 卢文华李穆曹磊
Owner WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST
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