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

Grid-connected converter resonance suppression method considering distributed capacitance of power transmission line

A technology of distributed capacitance and transmission lines, which is applied in the direction of circuit devices, AC network circuits, electrical components, etc., can solve problems such as deterioration of system resonance characteristics, achieve simple discretization, suppress the deterioration of system resonance characteristics, and reduce the amount of calculation in the system Effect

Active Publication Date: 2018-07-06
TAIYUAN UNIV OF TECH
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of deterioration of system resonance characteristics caused by line distribution parameters, the present invention provides a method for suppressing resonance of grid-connected converters that takes into account the distributed capacitance of transmission lines

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-connected converter resonance suppression method considering distributed capacitance of power transmission line
  • Grid-connected converter resonance suppression method considering distributed capacitance of power transmission line
  • Grid-connected converter resonance suppression method considering distributed capacitance of power transmission line

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0051] The present invention will be further described below in conjunction with specific examples.

[0052] A method for suppressing resonance of a grid-connected converter considering the distributed capacitance of a transmission line, comprising the following steps:

[0053] ① Detect and collect the three-phase voltage U of the grid-connected point a , U b , U c and the three-phase current I injected into the grid a , I b , I c ;Detect the three-phase voltage U on the grid side sa , U sb , U sc and grid-side three-phase current I sa , I sb , I sc ;

[0054] ②The three-phase voltage U of the grid-connected point a , U b , U c Input the abc / dq0 module to get the grid-connected point voltage d and q-axis components U d and U q ;

[0055] ③The three-phase current I will be injected into the power grid a , I b , I c Input the abc / dq0 module to get the grid-connected point current d, q-axis component i d and i q ;

[0056] ④ Given grid-connected active powe...

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-connected converter resonance suppression method considering distributed capacitance of a power transmission line, relates to the field of grid-connected converter operation and control in large-scale new energy power generation, and is a grid-connected converter resonance damping technique for suppressing system resonance characteristic deterioration caused by the ground distributed capacitance of the line. The grid-connected converter resonance suppression method is a control method for a grid-connected converter based on forward path additional digital filterdamping, namely a digital filter is added in a conventional control circuit. The digital filter damping link involves a low-pass filter, preferably a third-order low-pass filter; when the cutoff frequency is set low, a high-frequency signal can be attenuated to a large extent, so that the cutoff frequency is 400 Hz to 610 Hz; when the system resonant peak amplitude is offset, the system resonanceis suppressed. The grid-connected converter resonance suppression method is simple in discretization in actual digital control, and greatly reduces the amount of system calculation, additional sensorsare not needed, and additional power loss is not generated; the robustness is strong, and the dynamic response is good.

Description

technical field [0001] The invention relates to the field of operation and control of grid-connected converters in large-scale new energy power generation, specifically a method for suppressing resonance of grid-connected converters that takes into account the distributed capacitance of transmission lines, and is a method for suppressing the resonance caused by distributed capacitance of lines to ground Resonance damping technology for grid-connected converters with deteriorating system resonance characteristics. Background technique [0002] At present, due to the increasingly severe situation of energy shortage, new energy technologies such as photovoltaics and wind power have been developed rapidly. Large-scale renewable energy grid-connected power generation can effectively reduce resource investment and environmental pollution to a certain extent. However, when the outgoing line of the transmission line is long, the interaction between the large ground capacitance and ...

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): H02J3/24H02J3/38
CPCH02J3/24H02J3/382H02J2203/20
Inventor 韩肖清相莹萍王磊任春光梁琛
Owner TAIYUAN UNIV OF TECH
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