Self-adaptive dynamic terminal sliding mode control method for active power filter

A power filter, dynamic terminal technology, applied in adaptive control, general control system, control/regulation system, etc., can solve the problem of low control accuracy, high grid current distortion rate, and the inability to fully exert the performance of active power filter And other issues

Active Publication Date: 2019-09-27
HOHAI UNIV CHANGZHOU
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The control precision of the traditional control method is often not high, which leads to the performance of the active power filter cannot be fully utilized, and in addition
Existing controllers have high grid current distortion rate

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
  • Self-adaptive dynamic terminal sliding mode control method for active power filter
  • Self-adaptive dynamic terminal sliding mode control method for active power filter
  • Self-adaptive dynamic terminal sliding mode control method for active power filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0094] figure 1 This is the principle diagram of an adaptive dynamic terminal sliding mode control method of active power filter of the present invention. The principle diagram is intended to illustrate: the harmonic current is detected from the load current as the reference signal r, and the dynamic terminal is constructed based on the terminal function Sliding mode surface, and then design the switching control item to ensure the stability of the system, and use the double hidden layer recurrent neural network to approximate the equivalent control item. The designed control law outputs a harmonic compensation signal after passing through the active power filter. , Use negative feedback to make the system error tend to zero, and finally achieve the purpose of fast and no static error tracking of the reference harmonic current.

[0095] The adaptive dynamic terminal sliding mode control method of a source power filter of the present invention includes the following steps:

[0096]...

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 self-adaptive dynamic terminal sliding mode control method for an active power filter. The method comprises the following steps that: S1, a single-phase active power filter mathematical model is established, a state variable i is defined as x, and the expression of the second-order derivative of the x is obtained; S2, a tracking error and the first-order derivative thereof are defined, and a dynamic terminal sliding mode surface is defined, so that an equivalent control item is obtained, and then a switching control item is defined, and the equivalent control item and switching control item are added up, so that a dynamic terminal sliding mode controller is obtained; and S3, the approximation of the equivalent control item is realized through a double-hidden-layer recurrent neural network. With the self-adaptive dynamic terminal sliding mode control method for the active power filter of the invention adopted, zero-steady-state-error tracking can be quickly realized, and a low power grid current distortion rate can be achieved.

Description

Technical field [0001] The invention specifically relates to an active power filter adaptive dynamic terminal sliding mode control method, which belongs to the technical field of intelligent control. Background technique [0002] Harmonic current suppression technology has become a research hotspot in recent years. At present, the main harmonic suppression technologies include passive filters and active filters; passive filters are usually composed of inductors and capacitors and are suitable for filtering low-order harmonics. , And can only filter out specific harmonics, but because of its simple structure and low production cost, it is widely used in the industrial field, but the compensation accuracy of passive filters is not high, and will eventually be replaced by active power filters . Active power filter is a new type of harmonic compensation device. It is an active compensation device. In addition to compensating harmonics, it can also perform reactive power compensation...

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): G05B13/04H02J3/00
CPCG05B13/042H02J3/01
Inventor 陈云费峻涛陈放
Owner HOHAI UNIV CHANGZHOU
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