Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Active resistance-capacitance type direct current limiter based on double-capacitor oscillation and control method

A current limiter and active technology, which is applied in the direction of emergency protection circuit devices for limiting overcurrent/overvoltage, usage of superconductor elements, electrical components, etc., can solve the problem of high cost of active DC current limiter Difficulties and other problems, to achieve the effect of simple daily operation and maintenance, good current limiting effect, and low cost

Active Publication Date: 2020-03-13
EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the present invention proposes an active resistance-capacitance DC current limiter and a control method based on dual-capacitor oscillation, which mainly solves the problems of high cost and difficult operation and maintenance of the active DC current limiter

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
  • Active resistance-capacitance type direct current limiter based on double-capacitor oscillation and control method
  • Active resistance-capacitance type direct current limiter based on double-capacitor oscillation and control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] In order to make the purpose, technical solution and advantages of the present invention more clear and definite, the content of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only parts related to the present invention are shown in the drawings but not all content.

[0024] according to figure 1 As shown, this embodiment proposes an active RC-type DC current limiter based on dual-capacitor oscillation, including a parallel flow-through branch and a RC branch. The flow-through branch is composed of a mechanical switch MS. The resistance-capacitance branch is connected in series by the high-voltage arm capacitance branch, the low-voltage arm capacitance br...

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 an active resistance-capacitance type direct current limiter based on double-capacitor oscillation and a control method. The active resistance-capacitance type direct current limiter comprises a through-flow branch and a resistance-capacitance branch which are connected in parallel, the through-flow branch is composed of a mechanical switch, and the resistance-capacitance branch is composed of a high-voltage arm capacitor branch, a low-voltage arm capacitor branch and a semiconductor assembly which are connected in series. The high-voltage arm capacitor branch comprisesa high-voltage capacitor, a lightning arrester and a controllable discharge branch which are connected in parallel, the low-voltage arm capacitor branch comprises a low-voltage capacitor and a controllable charging power supply which are connected in parallel, and the semiconductor assembly is formed by antiparallel connection of a thyristor and a diode. The cathode of the low-voltage capacitor is electrically connected with the high-voltage capacitor, and the anode of the low-voltage capacitor is electrically connected with the anode of the semiconductor assembly. The beneficial effects of the present invention are that the current limiter is mainly composed of the mechanical switch, the high-voltage capacitor, the low-voltage capacitor, the thyristor, the diode and other conventional power devices, so that the manufacturing cost is low; and meanwhile due to the fact that the superconducting materials or power electronic devices are not applied, the daily operation and maintenance ofthe current limiter are simpler and more convenient.

Description

technical field [0001] The invention relates to the technical field of power equipment, in particular to an active resistance-capacitance DC current limiter and a control method based on double-capacitor oscillation. Background technique [0002] Hybrid multi-terminal DC transmission system is an important part of my country's long-distance transmission system. After a short-circuit fault occurs in the hybrid multi-terminal DC transmission system, the voltage source converter will feed the fault current to the fault point. For the fault current component fed by the voltage source converter, its flow path has small damping, fast rising speed and Cannot be cleared quickly by controlling the inverter. The voltage source converter is mainly composed of fully-controlled power electronic devices (IGBT), and its ability to withstand surge current is weak. Therefore, this part of the fault current may damage key equipment such as the converter, and then pose a serious threat to 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
Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/02H02H3/087
CPCH02H3/087H02H9/02Y02E40/60
Inventor 王越杨彭光强何竞松李清武霁阳国建宝杨光源王海军
Owner EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
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
Eureka Blog
Learn More
PatSnap group products