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

A kind of flexible direct current transmission converter impedance analysis method, device and storage medium

A flexible DC transmission and impedance analysis technology, applied in power transmission AC network, reducing/preventing power oscillation, single-network parallel feeding arrangement, etc., can solve the problem of ignoring the delay effect of signal processing, reduce errors and improve impedance Characteristic accuracy, the effect of improving accuracy

Active Publication Date: 2021-07-20
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Embodiments of the present invention provide a flexible direct current transmission converter impedance analysis method, device, and storage medium, which can effectively solve the problem that the existing technology ignores the delay effect of power electronic controllers in signal processing in actual engineering, and can effectively improve the system The accuracy of stability analysis, and can effectively reduce the error

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
  • A kind of flexible direct current transmission converter impedance analysis method, device and storage medium
  • A kind of flexible direct current transmission converter impedance analysis method, device and storage medium
  • A kind of flexible direct current transmission converter impedance analysis method, device and storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] see figure 1 , is a schematic flowchart of an impedance analysis method for a flexible direct current transmission converter provided in Embodiment 1 of the present invention, including steps S101 to S104.

[0064] S101. Obtain grid voltage signals and three-phase voltage and current signals in the grid.

[0065] S102. Input the grid voltage signal and the three-phase voltage and current signals into a preset flexible DC converter control loop model to obtain a three-phase voltage target signal; wherein, the flexible DC converter control loop model includes Phase-locked loop control model, rotating coordinate system model, active power control model, reactive power control model and current inner loop control model.

[0066] In an alternative embodiment, see figure 2 , is a schematic flow chart of data processing of the control loop model of the flexible DC converter provided in Embodiment 1 of the present invention, including steps S201 to S205.

[0067] S201. Inpu...

Embodiment 2

[0111] see image 3 It is a schematic structural diagram of a flexible direct current transmission converter impedance analysis device provided in Embodiment 2 of the present invention, including:

[0112] A signal acquisition module 301, configured to acquire grid voltage signals and three-phase voltage and current signals in the grid;

[0113] The control processing module 302 is configured to input the grid voltage signal and the three-phase voltage and current signal into a preset control loop model of the flexible DC converter to obtain a three-phase voltage target signal; wherein, the flexible DC The controller control loop model includes phase-locked loop control model, rotating coordinate system model, active power control model, reactive power control model and current inner loop control model;

[0114] An equivalent delay control module 303, configured to input the three-phase voltage target signal into a preset equivalent delay control model to obtain an equivalent...

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 an impedance analysis method, device and storage medium of a flexible direct current transmission converter, including acquiring grid voltage signals and three-phase voltage and current signals in a grid; inputting the grid voltage signals and three-phase voltage and current signals into a preset The control loop model of the flexible DC converter is obtained, and the three-phase voltage target signal is obtained; wherein, the control loop model of the flexible DC converter includes a phase-locked loop control model, a rotating coordinate system model, an active power control model, a reactive power control model and a Current inner loop control model; input the three-phase voltage target signal into the preset equivalent delay control model to obtain the equivalent delay three-phase voltage target signal; according to the equivalent delay three-phase voltage target signal, obtain the flexible DC transmission The impedance model of the converter can effectively solve the problem that the prior art ignores the delay effect of the power electronic controller in signal processing in actual engineering, can effectively improve the accuracy of system stability analysis, and can effectively reduce errors.

Description

technical field [0001] The invention relates to the technical field of power system stability analysis, in particular to an impedance analysis method, device and storage medium of a flexible direct current transmission converter. Background technique [0002] Compared with the traditional DC transmission system, the flexible DC transmission system based on the flexible DC converter has the advantages of small harmonic content, small footprint, and low maintenance cost. Therefore, the flexible DC transmission system is widely used in the process of large-scale new energy grid integration. However, a large number of reports have pointed out that there is a risk of oscillation in the process of connecting new energy to the grid through the flexible DC transmission system. Oscillations have been found many times in flexible DC transmission projects at home and abroad, directly affecting the normal operation of the grid, and even causing large wind farms to go off the grid. , eq...

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 Patents(China)
IPC IPC(8): H02J3/24H02J3/36H02J3/48H02J3/50
CPCH02J3/24H02J3/36H02J3/48H02J3/50Y02E60/60
Inventor 张帆洪潮袁豪张野杨健李俊杰孙鹏伟
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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