Supercharge Your Innovation With Domain-Expert AI Agents!

Three-phase voltage phase tracking method and device

A three-phase voltage and phase tracking technology, which is applied in the field of signal processing, can solve cumbersome problems and achieve the effects of simple design structure, shortened phase-locked response time, and reduced delay

Active Publication Date: 2019-01-29
CREAT POREEN POWER ELECTRONICS
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Based on this, it is necessary to solve the problem that the traditional phase-locking method needs to design a cumbersome controller, and provide an open-loop control three-phase voltage phase tracking method and device, which does not require cumbersome controller design, and the phase-locked loop design structure is simple

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
  • Three-phase voltage phase tracking method and device
  • Three-phase voltage phase tracking method and device
  • Three-phase voltage phase tracking method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0055] In order to make the purpose, technical solution and advantages of the present invention clearer, the method and device for phase tracking of the three-phase voltage of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0056] In one embodiment, such as image 3 , Figure 4 , Figure 5 As shown, a phase tracking method of three-phase voltage is provided, the method includes the following steps:

[0057] S200. Construct a synchronous rotation signal of the three-phase voltage according to the angular frequency of the three-phase voltage, and obtain a synchronous phase θ from the synchronous rotation signal.

[0058] As a specific real-time method, the synchronous rotation signal θ(k) can be constructed in the following way, assuming the samp...

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 provides a phase tracking method and device for three-phase voltage. The method includes: constructing the synchronous rotation signal of the three-phase voltage according to the angular frequency of the three-phase voltage, and obtaining the synchronous phase from the synchronous rotation signal; collecting the three-phase instantaneous voltage value of the three-phase voltage, and performing dq on the three-phase instantaneous voltage value Transform to obtain the dq voltage components of the three-phase voltage; transform the dq voltage components from rectangular coordinates to polar coordinates to obtain the current phase angle of the three-phase voltage; obtain the tracking phase of the three-phase voltage according to the synchronous phase and the current phase angle, and output the tracking phase . It saves the negative feedback link of the closed-loop phase-locking by constructing the synchronous rotation signal, that is, the design link of the controller is omitted, which not only simplifies the design of the phase-locked loop, but also reduces the delay. At the same time, it can also track the voltage frequency of the input three-phase voltage.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a phase tracking method and device for three-phase voltages. Background technique [0002] As power electronic equipment is used more and more in the conversion and transmission of electric energy, the phase-locking technology used to obtain the grid voltage phase in the DC-AC conversion process of the power converter has also been more and more applied. The response speed and precision of the phase-locked control algorithm have an important impact on the performance characteristics of the power converter, and improper setting of the phase-locked algorithm will cause overcurrent or overvoltage of the converter. The early frequency phase-locking and zero-crossing phase-locking and phase-locking methods based on hardware circuits were abandoned due to their inherent shortcomings such as poor parameter adjustment flexibility, slow response speed, and poor control accuracy....

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): H02M7/00
CPCH02M7/00H02M1/0003
Inventor 张皎郭高朋齐泽锋郭瑞成宋涛
Owner CREAT POREEN POWER ELECTRONICS
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com