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

Hybrid DC transmission system with fault processing function

A hybrid DC and power transmission system technology, applied in emergency treatment of AC circuit layout, AC network voltage adjustment, electrical components, etc., can solve the fault that cannot be effectively dealt with on the DC side, the active power cannot be output to the AC side, and increase the commutation. Station construction cost and other issues, to achieve the effect of reliable and smooth crossing, maintaining voltage, and simple structure

Pending Publication Date: 2019-09-24
NR ELECTRIC CO LTD +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] but figure 1 and figure 2 In the hybrid DC transmission system, when the DC transmission line has a flashover due to insulation degradation or a ground fault caused by tree branch collision, the DC system will short-circuit for a short time, the active power cannot be output to the AC side, and a huge DC fault current is generated. However , the existing modular multilevel converter DC power transmission system based on half-bridge sub-modules has a big defect: it cannot effectively deal with DC side faults, and the system reliability is low
The above solutions have greatly increased the construction cost of the converter station, and at the same time increased the loss of the DC system

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
  • Hybrid DC transmission system with fault processing function
  • Hybrid DC transmission system with fault processing function
  • Hybrid DC transmission system with fault processing function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] The technical scheme of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

[0047] A hybrid direct current transmission system with a fault handling function, comprising a hybrid direct current transmission system and a fault handling device, wherein the hybrid direct current transmission system includes a rectifier and converter station for connecting to an alternating current grid at a sending end, and a station for connecting to an alternating current grid at a receiving end An inverter converter station and a direct current transmission line for connecting the rectifier converter station and the inverter converter station, the inverter converter station is connected to the AC power grid at the receiving end through a tr...

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 hybrid DC transmission system with a fault processing function, which comprises a hybrid DC transmission system and a fault processing device, wherein the fault processing device includes a blocking unit and a measuring unit, or includes a blocking unit and a bypass switch, or includes a blocking unit, a bypass switch and a knife switch assembly, or includes a blocking unit, a measuring unit and a bypass switch, or includes a blocking unit, a measuring unit, a bypass switch and a knife switch assembly. The hybrid DC transmission system is low in cost and loss, the flexible control of the hybrid DC transmission system can be realized through the bridging bypass switch and measuring unit, DC transmission line faults of the hybrid DC transmission system can be effectively processed without locking a converter, fast recovery of the DC power can be realized after the fault, and the safety of an AC-DC transmission system is better protected.

Description

technical field [0001] The invention belongs to the field of hybrid direct current transmission, and in particular relates to a hybrid direct current transmission system with a fault processing function. Background technique [0002] HVDC systems can be divided into two types: conventional DC transmission systems (LCC-HVDC) based on thyristor technology and flexible HVDC systems based on fully controlled power electronic device technology (Flexible-HVDC). Among them, the conventional direct current transmission system (LCC-HVDC) has low cost, low loss, and mature operation technology. The inverter side is prone to commutation failure, strong dependence on the AC system, absorbing a large amount of reactive power, and large area occupied by the converter station. The new generation of flexible direct current transmission system (Flexible-HVDC) can realize the decoupling control of active power and reactive power, can supply power to the passive network, has a compact structu...

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): H02H7/26H02J3/36H02J3/16
CPCH02H7/268H02J3/36H02J3/16H02J3/001Y02E40/30Y02E60/60
Inventor 赵文强王永平杨建明卢宇李海英
Owner NR ELECTRIC CO LTD
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

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