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

Protection method, system and device for offshore wind power collection circuit and storage medium

A technology of collector lines and offshore wind power, applied in the field of relay protection of power systems, can solve problems affecting operating efficiency, cut-off, etc.

Pending Publication Date: 2022-04-05
NANJING GUODIAN NANZI POWER GRID AUTOMATION CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a protection method, system, device and storage medium for offshore wind power collection lines, and to solve the problem that the wind turbines in the current collection lines of the prior art need to be cut off. The entire collector line, technical issues that affect operating efficiency

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
  • Protection method, system and device for offshore wind power collection circuit and storage medium
  • Protection method, system and device for offshore wind power collection circuit and storage medium
  • Protection method, system and device for offshore wind power collection circuit and storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Such as figure 1 As shown, the embodiment of the present invention provides a protection method for offshore wind power collector lines, including the following steps:

[0051] 1. Divide the collector line into multiple node areas from the side where the collector line is connected to the power bus of the step-up station; figure 2 shown.

[0052] 2. According to the principle of ratio braking differential protection, the large difference ratio braking equation and the small difference ratio braking equation of each node area are constructed;

[0053] 2.1. The large difference ratio braking equation is:

[0054]

[0055] In the formula, is the differential current,

[0056]

[0057] is the braking current,

[0058]

[0059] is the current digital signal on the side of the booster station, is the current digital signal of the high-voltage side of the fan box in the i-th node area, and n is the number of node areas; I set is the setting value of differ...

Embodiment 2

[0074] An embodiment of the present invention provides a protection system for offshore wind power collector lines, the system includes:

[0075] The node area division module is used to divide the collector line into multiple node areas from the side where the collector line is connected to the power bus of the step-up station;

[0076] The ratio brake equation building block is used to construct the large difference ratio brake equation and the small difference ratio brake equation of each node area according to the ratio brake differential protection principle;

[0077] The current acquisition module is used to acquire the current analog signal on the side of the booster station and the high voltage side of each fan box, and convert the current analog signal into a current digital signal through analog-to-digital conversion;

[0078] The fault location module is used for fault location according to the current digital signal, the braking equation of the large difference rat...

Embodiment 3

[0082] An embodiment of the present invention provides a protection device for offshore wind power collector lines, including a processor and a storage medium;

[0083] The storage medium is used to store instructions;

[0084] The processor is configured to operate in accordance with the instructions to perform the steps according to any one of the methods described above.

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 protection method, system and device for an offshore wind power current collection circuit and a storage medium. The method comprises the steps that the current collection circuit is divided into a plurality of node areas from the side, connected with a booster station power bus, of the current collection circuit; constructing a large-difference ratio braking equation and a small-difference ratio braking equation of each node area according to a ratio braking differential protection principle; acquiring current analog quantity signals of the booster station side and the high-voltage side of each fan box transformer substation, and converting the current analog quantity signals into current digital quantity signals through analog-to-digital conversion; fault positioning is carried out according to the current digital quantity signal, the large-difference ratio braking equation and the small-difference ratio braking equation of each node area; performing fault isolation and system recovery according to a fault positioning result; the method can solve the problem of no selectivity in fan removal when the section current collection connection line breaks down.

Description

technical field [0001] The invention relates to a protection method, system, device and storage medium for offshore wind power collection lines, and belongs to the technical field of electric power system relay protection. Background technique [0002] The relay protection device is an important part of the power system and one of the important measures to protect the safe operation of the power system. The offshore wind power project collects the power generated by the wind turbine through the submarine cable collection line and transports it to the booster station, and then transports it to land after transformation or conversion. Each collector line is connected to about ten wind turbines, and a simple series connection is adopted between the fans. When the section collector connection line between two fans fails, all wind turbines on the collector line will be damaged. are cut off together, seriously affecting the efficient operation of the wind farm. In order to solve...

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): H02H1/00H02H3/26H02H7/26
Inventor 陈福锋韩志勇薛明军陈琦李玉平杨黎明
Owner NANJING GUODIAN NANZI POWER GRID AUTOMATION 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