A kind of control method of multilevel converter
A control method and converter technology, applied in the field of electric power, can solve problems such as difficult to control the voltage balance of flying capacitors of multi-level converters, and achieve the effect of simple implementation method
Active Publication Date: 2022-01-18
THE 13TH RES INST OF CHINA ELECTRONICS TECH GRP CORP
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] In view of this, an embodiment of the present invention provides a control method for a multilevel converter to solve the problem in the prior art that it is difficult to control the voltage balance of the flying capacitor of the multilevel converter
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0042] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
[0043] In order to illustrate the technical solutions of the present invention, specific examples are used below to illustrate.
[0044] An embodiment of the present invention provides a control method for a multilevel converter, which is applied to a multilevel converter, such as figure 1 As shown, the multilevel converter includes at least two switch tube groups S connected in series 1 -S N (...
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
Login to View More Abstract
The present invention is applicable to the field of electric power technology, and provides a control method of a multilevel converter. The method includes: collecting the inductor current of an LC filter in one driving pulse cycle; The adjusted first switch tube and the duty cycle adjustment amount of the first switch tube to be adjusted are adjusted based on the duty cycle adjustment amount of the first switch tube to be adjusted; the duty cycle of the first switch tube to be adjusted is adjusted; The slope of the falling period of the inductor current determines the second switch tube to be adjusted and the duty cycle adjustment amount of the second switch tube to be adjusted, and the second switch tube to be adjusted is based on the duty cycle adjustment amount of the second switch tube to be adjusted The duty cycle of the tube is adjusted. The invention only needs to collect the inductance current of the LC filter to control the voltages of the flying capacitors of the multilevel converter to achieve balance, and the realization method is simple and is not affected by the level quantity of the multilevel converter.
Description
technical field [0001] The invention belongs to the field of electric power technology, and in particular relates to a control method of a multilevel converter. Background technique [0002] The multilevel converter utilizes the flying capacitor to share the input voltage equally among the switching tubes connected in series, and to reduce the pressure of each switching tube. [0003] However, due to the fact that the input power supply is not an ideal voltage source and the delay of the gate drive signal is inconsistent, the flying capacitor voltage of the multilevel converter cannot be completely balanced in actual operation. When the flying capacitor voltage deviates from its theoretical value, it will As a result, the stress of the switch tube connected to it increases, which is easy to cause damage to the switch tube. At the same time, the bias voltage will also increase the ripple of the inductor current and reduce the quality of the output voltage. At present, the ex...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/07H02M1/14
CPCH02M3/073H02M1/14
Inventor 顾占彪张之梁成诗鹏任小永徐森锋谭超
Owner THE 13TH RES INST OF CHINA ELECTRONICS TECH GRP CORP