Unlock instant, AI-driven research and patent intelligence for your innovation.

Control method of single-phase quasi-single-stage ac-dc converter

A control method and converter technology, which are applied in the direction of converting AC power input to DC power output, high-efficiency power electronic conversion, and output power conversion devices, can solve the problems of large current harmonics on the AC side, and reduce harmonics, Eliminate the effects of decoupling and dead zone, the effect of fast dynamic response

Active Publication Date: 2020-12-15
哈工大(张家口)工业技术研究院 +1
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of large current harmonics on the AC side in the existing single-phase quasi-single-stage AC-DC converter control method, and to provide a single-phase quasi-single-stage AC-DC converter control method

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
  • Control method of single-phase quasi-single-stage ac-dc converter
  • Control method of single-phase quasi-single-stage ac-dc converter
  • Control method of single-phase quasi-single-stage ac-dc converter

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0042] Specific implementation mode one: the following combination figure 1 Describe this embodiment, the control method of the single-phase quasi-single-stage AC-DC converter described in this embodiment, the single-phase quasi-single-stage AC-DC converter includes a cascaded LC filter, a synchronous rectifier, a first bridge type converter, high frequency isolation transformer and second bridge type converter;

[0043] The specific process of the control method is:

[0044] S1. Collect the AC power supply voltage, obtain the phase angle of the AC power supply voltage through a phase-locked loop, and obtain the control signal of the synchronous rectifier;

[0045] S2. Obtain the reference value of the instantaneous value of the input current of the first bridge converter under unity power factor;

[0046] S3. Obtain the internal phase angle of the first bridge converter and the second bridge converter, and obtain the external phase angle between the first bridge converter a...

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 control method of a single-phase quasi-single-stage type AC-DC converter, belongs to the technical field of electric energy conversion, and aims to solve the problem that a conventional control method for the single-phase quasi-single-stage AC-DC converter is large in current harmonic waves of an AC side. The method specifically comprises the following steps: acquiring anAC power voltage, obtaining a phase angle of the AC power voltage through a phase-locked loop, and obtaining a control signal of a synchronous rectifier; obtaining a reference value of an input current instantaneous value of a first bridge type converter under a unit power factor; obtaining inner phase shift angles of the first bridge type converter and a second bridge type converter, and obtaining an outer phase shift angle between the first bridge type converter and the second bridge type converter; and performing the compensation for the time of a control signal dead zone. The method is used for electric energy conversion.

Description

technical field [0001] The invention relates to a control method of a single-phase quasi-single-stage AC-DC converter, belonging to the technical field of electric energy conversion. Background technique [0002] AC-DC power converters have been widely used in AC grid-connected batteries, supercapacitor energy storage systems, and photovoltaic power generation systems. The single-phase quasi-single-stage AC-DC converter adopts high-frequency isolation conversion technology, which can realize the electrical isolation between the DC source and the connected power grid without the need for large-scale power-frequency isolation transformers, effectively reducing the size of the system. In addition, due to The large-capacity electrolytic capacitor on the DC side is canceled, which further reduces the system volume, effectively improves the service life of the system, and indirectly improves the system performance. [0003] For the control of single-phase quasi-single-stage AC-DC...

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): H02M7/219
CPCY02B70/10
Inventor 吴凤江王贵忠李洪波侯英伟张国庆于文斌郭志忠
Owner 哈工大(张家口)工业技术研究院