Direct current limiter and application thereof

A current limiter, DC current technology, applied in emergency protection circuit devices, electrical components, emergency protection circuit devices for limiting overcurrent/overvoltage, etc. The problem of high energy absorption can reduce the breaking pressure, improve economic efficiency, and reduce the breaking pressure.

Pending Publication Date: 2019-12-10
HUAZHONG UNIV OF SCI & TECH
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects of the prior art, the purpose of the present invention is to solve the technical problem that the existing DC circuit

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
  • Direct current limiter and application thereof
  • Direct current limiter and application thereof
  • Direct current limiter and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0040] The invention provides a DC current limiter, aiming at solving the technical problems in the prior art that it is difficult to break a large fault current and the energy absorption of an arrester is too high due to breaking a large fault current.

[0041] In order to achieve the above purpose, according to one aspect of the present invention, a DC current limiter is provided, including: ...

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 direct current limiter and an application thereof. The direct current limiter comprises a current limiting unit, an energy absorption unit and a direct-current circuit breaker unit, wherein the current limiting unit is composed of a three-phase coupling reactor, a pre-charging capacitor, a smoothing reactor, a small direct-current circuit breaker and a line, and when a short-circuit fault occurs, the coupling reactor is equivalent to a large inductor to be connected into a main loop in series, and a voltage opposite to the power supply voltage is generated on the inductor to limit the fault current and reduce energy absorption of a lightning arrester; the energy absorption unit is formed by connecting a diode and a resistor in series and can inhibit stored energyof an inductive element in the line from being transmitted to the lightning arrester; the direct-current circuit breaker unit comprises a direct-current circuit breaker and a lightning arrester, the circuit breaker cuts off the fault current, and the lightning arrester absorbs energy stored by the inductor. The hybrid direct current limiter provided by the invention realizes control of the fault current, energy absorption limitation of the lightning arrester and parallel connection of capacitors to reduce the capacity, and is low in manufacturing cost.

Description

technical field [0001] The present invention relates to the field of DC current limiters, more specifically, to a DC current limiter and its application. Background technique [0002] DC transmission is an effective measure for distributed green energy to connect to the grid, and DC transmission also has the advantages of long transmission distance, small loss, and large transmission capacity, which has important research significance. [0003] With the development of DC transmission, the voltage level of the DC grid continues to increase, which increases the transmission efficiency of the grid and the reliability of the grid, but also makes the short-circuit current continue to increase, increasing the DC circuit breaker (DCCB) Breaking pressure makes it difficult to shut down the DC side circuit breaker. If the DC side fails to remove the fault in time, the AC side circuit breaker on the converter side needs to perform related actions to block the converter valve group to ...

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): H02H9/02H02H3/087H02H3/02
CPCH02H3/025H02H3/087H02H9/021
Inventor 陈立学李归霞袁召
Owner HUAZHONG UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap