Virtual impedance comprehensive control method for power inductive filtering system

A virtual impedance and comprehensive control technology, applied in flexible AC transmission systems, inductors, active power filtering, etc., can solve problems such as noise and harmonic current loss, achieve low capacity requirements, reduce structural volume, and reduce manufacturing. The effect of process requirement dependence

Active Publication Date: 2016-09-07
HUNAN UNIV
View PDF3 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the new induction filter transformer can also solve the problems of loss and noise caused by the harmonic current generated by the industrial rectifier load itself.

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
  • Virtual impedance comprehensive control method for power inductive filtering system
  • Virtual impedance comprehensive control method for power inductive filtering system
  • Virtual impedance comprehensive control method for power inductive filtering system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0045] In order to make the above objects, features and advantages of the present invention more comprehensible, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be pointed out that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all those skilled in the art can obtain without creative work. Other embodiments all belong to the protection scope of the present invention.

[0046] Please refer to figure 1 , the figure shows a power induction filter system, taking the low-voltage side induction connection as an example, including a specially designed new induction filter transformer 2 and filter branch. The filtering branch includes a passive filtering device 4 and a voltage source inverter 7, the passive filtering device 4 is composed of a single t...

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 power inductive filtering system and a virtual impedance comprehensive control method therefor. The power inductive filtering system mainly comprises a novel inductive filtering transformer subjected to special design and a filtering branch connected with the novel inductive filtering transformer, wherein the filtering branch comprises a single tuned filter set and harmonic current controlled voltage source inverters connected in series. According to the power inductive filtering system and the virtual impedance comprehensive control method, power grid resonance damping control of the voltage source inverters is organically combined with zero impedance control of filters according to unsolved technical problems in an existing filtering method and existing device manufacturing process difficulties, so that the problem of performance reduction of a passive filtering device caused by impedance parameter change of a power grid system is solved on one hand and the optimization control of a quality factor of the passive filtering device can be realized for reducing the dependence on the level of a device production process on the other hand; and quality factors of the single tuned filters are enabled to meet design requirements, so that the overall filtering characteristics are further improved.

Description

technical field [0001] The invention relates to the field of harmonic control of industrial rectification systems, in particular to a method for comprehensive control of virtual impedance of a power induction filter system that combines grid-side resonance damping control with quality factor control of a passive filter device. Background technique [0002] For power supply systems of high energy-consuming enterprises such as chemical industry and metallurgy, in order to improve operating efficiency and save investment costs, thyristor phase-controlled rectification systems are generally used. Due to the inherent nonlinear characteristics of such power electronic devices, it will inevitably lead to power quality problems such as large primary-side current distortion rate, excessive harmonic current injected into the grid side, and low power factor. [0003] At present, in solving the power quality problems of industrial rectification systems, the main measures taken are passi...

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): H02J3/01H01F27/28
CPCH01F27/28H02J3/01H02J3/1842H02J3/1864H02J3/1878H02M1/12H02M1/126Y02E40/10Y02E40/20Y02E40/30H01F38/14H02M7/46H02M7/537
Inventor 李勇刘乾易胡斯佳罗隆福曹一家
Owner HUNAN 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