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

A DC fault ride-through method for a flexible DC grid

A DC fault ride-through and flexible DC technology, applied in the field of power engineering, can solve the problems of no engineering practice and no research on DC fault ride-through strategy, and achieve the effects of accurate and efficient fault ride-through capability, high fault isolation rate, and reduced overvoltage

Active Publication Date: 2019-04-02
XUJI GRP +4
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no research in the industry on the most basic DC fault ride-through strategy in flexible DC grids, especially the DC fault ride-through strategy for flexible DC grids with DC circuit breakers has not yet been implemented in engineering practice

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
  • A DC fault ride-through method for a flexible DC grid
  • A DC fault ride-through method for a flexible DC grid
  • A DC fault ride-through method for a flexible DC grid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] The invention provides a DC fault ride-through method for a flexible DC grid. The purpose of this method is to realize the DC fault ride-through of the flexible DC grid, and the DC faults are divided into two types: 1) DC faults of the converter station; 2) DC faults of the DC transmission line. This method sets two independent control and protection systems for the converter station and the DC circuit breaker. When a DC fault occurs, according to different fault types, the DC fault ride-through of the flexible DC grid is completed by coordinating the control of the DC circuit breaker and the converter station.

[0033] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0034] The method provided by the present invention mainly includes fault judgment, and then completes DC fault ride-through through cooperation of a DC circuit breaker and a converter station. The DC fault ride-through provided by the prese...

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 provides a DC fault ride-through method for a flexible DC power grid. In order to realize the purpose of DC fault ride-through for the flexible DC power grid, DC fault are divided into two categories in the method including DC faults of converter stations and DC faults of DC power transmission lines. Two independently controlled protection systems are set for the converter stations and DC circuit breakers. When a DC fault occurs, DC fault ride-through of the flexible DC power grid is completed by coordinating and controlling the DC circuit breakers and the converter stations for different types of faults. During the DC fault occurring process, related non-fault converter stations and power transmission lines work normally and may not be affected, thereby realizing stable operation of a flexible DC power grid.

Description

technical field [0001] The invention belongs to the technical field of electric power engineering, and in particular relates to a DC fault ride-through method for a flexible DC grid. Background technique [0002] The DC power grid based on flexible DC transmission technology connects various energy sources such as wind power and photovoltaics distributed in various regions, and utilizes the complementarity among various energy forms such as wind power, photovoltaics, and energy storage to overcome the intermittency of renewable energy generation. Improve the utilization rate of renewable energy power generation. Modular multilevel voltage source converter (MMC) is the second generation of flexible DC transmission technology, and many lines have been put into operation or are under construction. However, the half-bridge MMC does not have the ability to clear DC faults. With the development of DC circuit breaker technology, flexible DC grid technology has the possibility to r...

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 Patents(China)
IPC IPC(8): H02J3/36
CPCY02E60/60
Inventor 张军吴金龙王先为刘欣和行登江张浩姚为正张志刚
Owner XUJI GRP
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