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

An additional control method and system for suppressing transient overvoltage of a direct drive fan

A transient overvoltage and additional control technology, applied in wind turbine control, engine control, control algorithm types, etc., can solve the problem that the transient overvoltage of the direct-drive fan cannot be effectively suppressed, and the transient overvoltage of the direct-drive fan is not considered. and other problems to achieve the effect of suppressing transient overvoltage and ensuring safe operation

Active Publication Date: 2021-11-02
HUAZHONG UNIV OF SCI & TECH +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the above-mentioned terminal voltage feed-forward control can protect the direct-drive fan from the impact of overcurrent, the conventional feed-forward control can only satisfy the output voltage of the equivalent voltage of the direct-drive fan to quickly track the change of the terminal voltage, and does not consider the direct drive fan. The transient overvoltage problem of the fan cannot effectively suppress the transient overvoltage in the direct drive fan

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
  • An additional control method and system for suppressing transient overvoltage of a direct drive fan
  • An additional control method and system for suppressing transient overvoltage of a direct drive fan
  • An additional control method and system for suppressing transient overvoltage of a direct drive fan

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] An additional control method to suppress the transient overvoltage of the direct drive fan, such as figure 2 shown, including:

[0058] When the terminal voltage of the direct drive fan rises, a voltage correction signal is generated according to the change index of the terminal voltage, and the voltage correction signal is added to the output terminal of the PI controller in the current control link of the direct drive fan grid side converter to correct the output of the PI controller The d and q axis components of the equivalent internal potential of the direct drive fan are used to reduce the equivalent power output voltage of the direct drive fan, thereby suppressing the transient overvoltage of the direct drive fan;

[0059] It is easy to understand that, in order to reduce the equivalent power supply output voltage of the direct drive fan after adding the voltage correction signal, in the present invention, both the d-axis component and the q-axis component of th...

Embodiment 2

[0069] An additional control method for suppressing the transient overvoltage of a direct-drive fan, this embodiment is similar to the above-mentioned embodiment 1, the difference is that in this embodiment, the change index of the terminal voltage is the change rate of the terminal voltage, and the generated The specific way of voltage correction signal is:

[0070] according to respectively generate the d-axis component E of the voltage correction signal dctrl and the q-axis component E qctrl ;

[0071] in, and Respectively represent V d and V q rate of change; k 3 ~k 6 is the gain parameter, and s is the differential operator.

Embodiment 3

[0073] An additional control method for suppressing the transient overvoltage of a direct drive fan, this embodiment is similar to the above-mentioned embodiment 1, the difference is that in this embodiment, the change index of the terminal voltage is the change amount of the terminal voltage, and the generated The specific way of voltage correction signal is:

[0074] or, according to respectively generate the d-axis component E of the voltage correction signal dctrl and the q-axis component E qctrl ;

[0075] Among them, ΔV d and ΔV q Respectively represent V d and V q The amount of change; k 7 ~k 10 is the gain parameter, and s is the differential operator.

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 additional control method and system for suppressing the transient overvoltage of a direct-drive fan, belonging to the field of voltage safety control of a power system, including: when the terminal voltage of a direct-drive fan rises, a voltage correction signal is generated according to a change index of the terminal voltage , and add the voltage correction signal as a feedforward control signal to the output terminal of the PI controller in the current control link of the direct-drive fan grid-side converter, and correct the d and q-axis components of the equivalent internal potential of the direct-drive fan output by the PI controller , to reduce the output voltage of the equivalent power supply, thereby suppressing the transient overvoltage of the direct drive fan. The invention can effectively suppress the transient overvoltage of the direct drive fan, ensure the safe operation of the power system, and only respond to the situation of the terminal voltage rising, and does not act when the terminal voltage is constant or falling, and can ensure the suppression of the transient state In the case of overvoltage, the normal control of the direct drive fan will not be affected.

Description

technical field [0001] The invention belongs to the field of power system voltage safety control, and more specifically relates to an additional control method and system for suppressing transient overvoltage of a direct-drive fan. Background technique [0002] In recent years, with the increasing proportion of wind power generation in the power system, it has gradually become the core factor that determines the dynamic behavior of the system, and the controller is the core factor that determines the dynamic characteristics of the wind turbine. [0003] With the wide application of direct-drive fans in power systems, their transient overvoltage problems frequently appear, which endangers the safe operation of power systems. The emergence of the transient overvoltage problem of the direct drive fan seriously damages the quality of power supply and endangers the safety of power supply. At present, the terminal voltage feed-forward control commonly used in direct-drive wind tu...

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): F03D7/00
CPCF03D7/00F05B2270/337F05B2270/705Y02E10/72
Inventor 何维付天照张睿黄谨王衡
Owner HUAZHONG UNIV OF SCI & TECH
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