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

Wind turbine generator fault ride-through control method and system

A wind turbine and fault ride-through technology, applied in wind power generation, electrical components, circuit devices, etc., can solve problems such as DC converter station overload, converter station blocking, etc., to ensure power balance, ensure stable operation, and realize fault ride-through Effect

Pending Publication Date: 2018-05-29
CHINA ELECTRIC POWER RES INST +2
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When the flexible DC grid fails, it is difficult for wind power to detect the occurrence of the fault in time and continue to inject power into the DC grid, which will lead to overloading of the DC converter station, which will seriously cause the entire converter station to be blocked.

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
  • Wind turbine generator fault ride-through control method and system
  • Wind turbine generator fault ride-through control method and system
  • Wind turbine generator fault ride-through control method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0053] In order to better understand the present invention, the content of the present invention will be further described below in conjunction with the accompanying drawings and examples.

[0054] If the long-distance transmission of large-scale wind power adopts AC and traditional DC schemes, a large amount of synchronous power supply support is required. Flexible DC transmission does not require strong synchronous support from the sending grid and has flexible control. It will become one of the effective ways for large-scale wind power long-distance transmission in the future. . The wind farm is no longer connected to the AC grid, but directly connected to the flexible DC grid, that is, the large-scale wind power "island" is connected to the flexible DC grid. image 3 A schematic diagram of the wind power island connected to the flexible DC grid is given.

[0055] When a temporary fault occurs in the flexible DC grid, it is difficult to transmit wind power under normal ope...

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 wind turbine generator fault ride-through control method and a system. The method comprises the following steps that when having a fault, a flexible direct current converter station emits an active power control signal to a wind turbine generator according to a preset active power control strategy table and drives the wind turbine generator to carry out active power control; and when returning to operate, the flexible direct current converter station updates the active power control signal according to the active power control strategy table, emits the active power control signal to the wind turbine generator, drives the wind turbine generator to carry out the active power control and completes fault ride-through. In the technical scheme, when the fault is generated, wind power output power is timely adjusted; and after fault recovery, the control signal is timely updated, the output of the wind turbine generator is further and accurately adjusted, and the power balance of a power grid is guaranteed so that the wind turbine generator and the flexible direct current converter station realize the fault ride-through.

Description

technical field [0001] The invention relates to the technical field of fault ride-through control of wind turbines, in particular to a fault ride-through control method and system for wind turbines. Background technique [0002] If traditional AC and DC schemes are adopted for large-scale wind power long-distance transmission, a large amount of synchronous power supply support is required. Flexible DC power transmission does not require strong synchronous support from the sending grid and has flexible control. It will become one of the effective ways for large-scale wind power long-distance transmission in the future. one. Although both the flexible DC grid and the wind turbines use power electronic components, but the wind turbines are connected to the flexible DC grid through AC grid connection, the fault perception of the two is not synchronized, the control mode of the DC grid is complex, and the control mode of the wind turbine is very complicated. Mutual coupling. ...

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): H02J3/38H02J3/36
CPCH02J3/386H02J3/36H02J3/388Y02E60/60Y02E10/76
Inventor 李琰刘超迟永宁
Owner CHINA ELECTRIC POWER RES INST
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