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

GSC control method based on resonance second order sliding mode

A control method, a second-order sliding mode technology, applied in the direction of converting irreversible AC power input to DC power output, and converting irreversible DC power input to AC power output, etc., can solve the adverse effects of rapidity and stability, large Control delay, reduce the rapidity of system response, etc.

Active Publication Date: 2015-06-17
ZHEJIANG UNIV
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned extraction of negative sequence and harmonic components introduces a large number of coordinate transformations and notch filters, resulting in a large control delay, easy to cause unstable operation of the system, and reduce the rapidity of system response
Thirdly, the calculation process of the current reference value is complicated, and the coordinates of the calculation results need to be rotated to the positive synchronous speed coordinate system, which also adversely affects the rapidity and stability of the system operation

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
  • GSC control method based on resonance second order sliding mode
  • GSC control method based on resonance second order sliding mode
  • GSC control method based on resonance second order sliding mode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0045] In order to describe the present invention more specifically, the GSC control method of the present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0046] like figure 2 As shown, a GSC control method based on the resonant second-order sliding mode includes the following steps:

[0047] (1) Use the voltage Hall sensor 2 to collect the three-phase incoming line voltage U of the GSC a ~ U c and DC bus voltage U dc , using the current Hall sensor 3 to collect the three-phase incoming line current I of the GSC a ~ I c ;

[0048] Use the Clark transformation module 4 to pair the three-phase incoming line voltage U a ~ U c and three-phase incoming line current I a ~ I c Perform Clark transformation to obtain the α-axis component U of the three-phase incoming line voltage in the static α-β coordinate system α and the β-axis component U β And the α-axis component I of the three-phase inc...

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 GSC control method based on a resonance second order sliding mode. The control method is performed directly in a rest frame, power grid voltage phase estimation is omitted; complex negative sequence and harmonic component extraction is unnecessary, so that disintegration delay is avoided, and control speed is increased; adverse effect caused by power grid voltage imbalance and harmonic waves, so that stable output, low steady error state and good dynamic response features are achieved, and expected control effect is achieved; by the method, enhanced GSC control can be achieved under weak power grid voltage, and power output capacity of the converters during power grid faults is increased effectively.

Description

technical field [0001] The invention belongs to the technical field of converter control, and in particular relates to a GSC control method based on a resonant second-order sliding mode. Background technique [0002] GSC (grid-connected three-phase voltage source converter) has been widely used in power factor compensation, renewable energy, DC transmission, active filtering, etc. field. At present, in the research of GSC, it is generally assumed that the power grid is an ideal sinusoidal voltage, and the vector directional control method is used to control the stability of the DC bus voltage and maintain excellent output power quality. However, in practice, the power grid shows more non-ideal characteristics of imbalance and harmonic distortion. GSC operating in this case will show harsh power fluctuations and harmonic currents, which will further pollute the power grid and destroy the operation stability of the power grid. At the same time, it will also cause fluctuation...

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): H02M7/12H02M7/48
Inventor 年珩全宇
Owner ZHEJIANG UNIV
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