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

Implementation method of hybrid AC/DC distribution network protection

A technology of AC-DC hybrid and implementation method, which is applied in the field of power system and its automation, can solve problems such as failure to meet the stability requirements of AC-DC hybrid distribution network, lack of coordination and cooperation, and lack of collaborative fault handling capabilities to achieve good coordination The effect of fault handling ability, ensuring normal power supply and shortening the low voltage time

Inactive Publication Date: 2018-08-14
NARI TECH CO LTD +3
View PDF1 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a method for realizing the protection of the AC-DC hybrid distribution network, and solve the problem that the traditional power distribution system protection configuration cannot meet the stability requirements of the AC-DC hybrid distribution network, and the mutual Technical problems such as lack of coordination and cooperation and lack of collaborative fault handling capabilities

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
  • Implementation method of hybrid AC/DC distribution network protection
  • Implementation method of hybrid AC/DC distribution network protection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0032] Such as figure 1 As shown, the AC / DC hybrid distribution network protection includes a central unit and an on-site unit. The on-site unit uses a conventional CT / PT (current transformer / voltage transformer), and adds time stamps to the analog sampling data, together with the on-site The switching value, event information, and trip information of the unit are sent to the central unit through the optical fiber network, and various data are collected at the central unit, and after comprehensive logic judgment, the tripping and blocking information is sent to the corresponding local unit to complete the fault. isolation.

[0033] The communication between the central unit and the local unit ...

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 implementation method of hybrid AC / DC distribution network protection, which comprises a central unit and a plurality of local units communicated with the central unit. Theimplementation method comprises the following steps: each local unit adds a time mark to analog sampling data and then sends the analog sampling data to the central unit with switching values, event information and tripping information together, and the central unit determines a fault point of a hybrid AC / DC distribution network according to the received data, and feeds back the tripping information and latching information to an associated local unit according to the fault type of the fault point so as to implement fault isolation of the associated local unit. The implementation method provided by the invention can keep the stable operation of an AC / DC system to the greatest extent, guarantees the normal power supply of non-fault regions in an AC / DC hybrid system, and reduces the power failure time and the low-voltage running time of a user so as to have very high application value.

Description

technical field [0001] The invention relates to a method for realizing the protection of an AC-DC hybrid distribution network, and belongs to the technical field of electric power systems and automation thereof. Background technique [0002] Research results in recent years have shown that the AC-DC hybrid distribution network based on flexible DC technology is more suitable for the development of modern urban distribution networks. The AC-DC hybrid distribution network can better accommodate distributed power sources and DC loads, and can alleviate the contradiction between limited corridors of urban power grid sites and high load density. loss. Therefore, the AC-DC hybrid distribution network is an important development trend of the distribution network, which can effectively improve the power quality, reliability and operating efficiency of the urban power distribution system. At present, for the fault characteristics and protection and control technology of the flexibl...

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): H02H7/26
CPCH02H7/262H02H7/263
Inventor 郑舒赵景涛蔡月明刘明祥徐志华陈平黄仁乐常乾坤洪涛
Owner NARI TECH CO LTD
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