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

Natural coordinate orientation based active power filter control method

A technology of power filter and control method, applied in active power filter, electrical components, circuit devices, etc., can solve problems such as multiple hardware resources and complex control algorithms, so as to improve system efficiency, reduce calculation amount, and reduce occupancy rate Effect

Inactive Publication Date: 2017-01-04
GUANGXI UNIV
View PDF1 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This application provides an active power filter control method based on natural coordinate orientation, which solves the phase delay introduced by using a low-pass filter to detect harmonic current in the traditional active power filter control method, as well as the complex control algorithm and comparison The problem of multiple hardware resources ensures that the active power filter can effectively compensate the harmonic current, simplify the control algorithm, improve the reliability of the system operation, and provide technical support for its large-scale promotion

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
  • Natural coordinate orientation based active power filter control method
  • Natural coordinate orientation based active power filter control method
  • Natural coordinate orientation based active power filter control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0032] An active power filter control method based on natural coordinate orientation, comprising the following steps:

[0033] 1), the system main circuit structure that the present invention adopts is as figure 1 As shown, the grid-side three-phase voltage u of the distribution network is collected in real time respectively sa , u sb , u sc , DC bus voltage u dc , three-phase grid-connected current i a i b i c , Active power filter side three-phase current i ca i cb i cc and three-phase nonlinear load current i La i Lb i Lc ;

[0034] 2), by setting the given command voltage and the DC bus voltage u on the active power filter side obtained in step 1) dc After the difference is made, the PI control is performed through the PI controller to obtain the active current command At the same time, the reactive current command

[0035...

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 natural coordinate orientation based active power filter control method, which comprises the following steps: collecting in the real time the power grid side three-phase voltage, the DC bus voltage, the three-phase grid-connected current, the active power filter side three-phase current and the three-phase non-linear load current; calculating respectively the three-phase voltage peak, the active unit components, the power grid side commanded current, and the harmonic compensation commanded current; and accessing the three-phase SPWM modulation signal to drive the active power filter to work and therefore, to achieve the goal of treating harmonic pollution in the power grid. The method of the invention uses the power grid side voltage signal for natural coordinate orientation without the need of coordinate transformation and the traditional phase-lock loop. In addition, in contrast to a traditional harmonic detection method, the method of the invention does not need a low-pass filter, avoiding the influence of system delay. With reduced algorithm complexity, the harmonic compensation of the active power filter to the non-linear load grid-connected current can be achieved, which effectively solves the harmonic pollution problem of the non-linear load to the power grid and provides technical support for its large-scale application.

Description

technical field [0001] The invention belongs to the field of power quality regulation, and in particular relates to an active power filter control method based on natural coordinate orientation. Background technique [0002] In order to alleviate the pressure of energy demand and environmental protection, new energy distributed power generation technology has attracted the attention of people from all walks of life. With the continuous development and application of power electronic devices, the pollution of power grids is becoming more and more serious due to the harmonics generated by them. With its flexible controllability, Active Power Filter (APF) has gradually become one of the most effective ways to solve the problem of harmonic pollution by injecting current into the grid and compensating the harmonic current and reactive power generated by the load. one. [0003] Traditional control methods for active power filters are mostly based on harmonic current detection, a...

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): H02J3/01H02J3/38
CPCH02J3/01H02J3/381Y02E40/20
Inventor 胡立坤黄太昱卢泉林远刘博文张力朱子阳
Owner GUANGXI 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