Grid-side inverter resonance full-order sliding mode control method for harmonic distortion working condition of power grid voltage

A full-order sliding mode and harmonic distortion technology, applied in the field of power grids, can solve the problems of reduced sinusoidal degree and large fluctuation frequency, and achieve the effect of enhancing the suppression ability

Active Publication Date: 2018-01-19
HARBIN INST OF TECH
View PDF2 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to better solve the problem that the sinusoidal degree of the grid-connected current waveform is reduced and the fluctuating frequency of active and reactive power is large under the grid vol

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
  • Grid-side inverter resonance full-order sliding mode control method for harmonic distortion working condition of power grid voltage
  • Grid-side inverter resonance full-order sliding mode control method for harmonic distortion working condition of power grid voltage
  • Grid-side inverter resonance full-order sliding mode control method for harmonic distortion working condition of power grid voltage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0055] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0056] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0057] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

[0058] Such as figure 1 As shown, a grid-side inverter resonant full-order sliding mode control method for grid...

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 grid-side inverter resonance full-order sliding mode control method for the harmonic distortion working condition of the power grid voltage. According to the method, a mathematical model of a three-phase network side inverter is subjected to clark conversion, and the mathematical model of the grid-side inverter under a two-phase static alpha beta coordinate system is obtained. According to a full-order sliding mode surface model, a full-order sliding mode surface according to the mathematical model of the grid-side inverter is established. Resonance items are added into the full-order sliding mode surface so as to carry out resonance full-order sliding mode control. According to the method, by adopting the full-order sliding mode control method of the robustness of the DFIG network side inverter based on the enhanced parameter change of the model, a control method for introducing the quasi-proportional resonance into the full-order sliding mode is provided. Therefore, the suppression capacity of the full-order sliding mode control on the harmonic waves is enhanced. Meanwhile, the robustness of the full-order sliding mode control on the harmonic waves is not lost.

Description

technical field [0001] The invention relates to the field of power grids, in particular to a grid-side inverter resonance full-order sliding mode control method for grid voltage harmonic distortion working conditions. Background technique [0002] In the actual system, due to the tolerance, aging of components and the influence of system parasitic parameters, there are differences between the actual mathematical model and the model established according to the ideal conditions, regardless of the traditional PI control or PIR control, it is affected by the system The impact of parameter changes is relatively large, which can easily cause the system closed-loop pole to shift, and the stability of the entire system will decline. [0003] In recent years, as the proportion of the capacity of the distributed generation system in the power grid has increased year by year, harsh working conditions such as long wind power transmission lines, load asymmetry, unbalanced grid voltage, ...

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): H02J3/01
CPCY02E40/40
Inventor 郑雪梅李贺侯丽珺庞松楠李鑫陈若博邱凯庆
Owner HARBIN INST OF TECH
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