Double-fed fan symmetric fault active support control method based on transient controllable domain

A doubly-fed wind turbine and symmetrical fault technology, applied in the control of wind turbines, wind turbines, machines/engines, etc., can solve the problems of limited active support capacity, unable to guarantee its own safety, and time-varying characteristics, so as to avoid multiple One-time investment, ensuring stability and ensuring the effect of safety

Inactive Publication Date: 2021-11-19
SHANDONG UNIV
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Doubly-fed wind turbines (DFIG) need to provide active and reactive current support to the grid after a grid fault. However, limited by the transient characteristics of DFIG and the capacity of the rotor-side converter (RSC), DFIG's active fault support capability is limited and time-consuming. It can no longer provide continuous support to the power grid under the premise of ensuring its own safety.

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
  • Double-fed fan symmetric fault active support control method based on transient controllable domain
  • Double-fed fan symmetric fault active support control method based on transient controllable domain
  • Double-fed fan symmetric fault active support control method based on transient controllable domain

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0042] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0043] It should be noted that the terminology used here is only for describing specific embodiments, and is not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0044] Th...

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 double-fed fan symmetric fault active support control method based on a transient controllable domain. The method comprises the following steps: calculating a change condition of an intermediate parameter along with a rotating speed according to a double-fed fan unit parameter; selecting an alternating current equivalent resistance value of the hardware protection device; measuring the end voltage of the doubly-fed fan, performing voltage coordinate conversion, and calculating a rotor current DR component; according to the rotor current DR component obtained through calculation, calculating a transient controllable domain in combination with RSC maximum transient current limitation; under the condition that the transient controllable domain exists after the fault, according to the transient controllable domain obtained through calculation, carrying out amplitude limiting on the rotor current reference value; and under the condition that the transient controllable domain does not exist, predicating the controllable domain after Crowbar excision to determine the Crowbar excision moment, so as to avoid repeated triggering. According to the invention, the safety of the DFIG and the continuity of power grid support are ensured, and the stability of the end voltage of the DFIG is ensured.

Description

technical field [0001] The invention belongs to the technical field of power grid fault control, and in particular relates to an active support control method for a symmetrical fault of a doubly-fed fan based on a transient controllable domain. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Doubly-fed wind turbines (DFIG) need to provide active and reactive current support to the grid after a grid fault. However, limited by the transient characteristics of DFIG and the capacity of the rotor-side converter (RSC), the active support capability of DFIG is limited and time-consuming. It can no longer provide continuous support to the power grid under the premise of ensuring its own safety. Contents of the invention [0004] In order to solve the above problems, the present invention proposes an active support control method for symmetrical...

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): H02J3/48H02J3/50H02J3/24F03D7/02F03D7/04
CPCH02J3/48H02J3/50H02J3/24F03D7/0284F03D7/0288F03D7/04H02J2300/28Y02E10/72Y02E10/76
Inventor 丁磊高雪松朱国防
Owner SHANDONG UNIV
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
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap