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Method of controlling a multilevel converter

A converter, multi-level technology, applied in the direction of adjusting electrical variables, control/regulating systems, converting DC power input to DC power output, etc., can solve problems such as multi-time, and achieve the effect of reducing arrangement time

Active Publication Date: 2017-03-01
LSIS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Here, the first and second sub-operations, in other words, converting the voltage values ​​into digital values ​​and arranging the converted digital values, require a very large amount of time

Method used

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  • Method of controlling a multilevel converter
  • Method of controlling a multilevel converter
  • Method of controlling a multilevel converter

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Embodiment Construction

[0022] Reference will now be made in detail to embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings.

[0023] A method of controlling a multilevel converter according to an embodiment will be described in detail with reference to the accompanying drawings. However, the invention may be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein; rather, the invention included in other degenerates can be readily obtained by addition, modification and variation There may be alternative embodiments within or within the spirit and scope of this disclosure, and such alternative embodiments will fully convey the concept of the present invention to those skilled in the art.

[0024] In the following description, detailed descriptions of well-known functions or constructions will be omitted since they would obscure the invention in unnecessary detail.

[0025] figure 2 is a diagra...

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Abstract

The present invention provides a method of controlling a multilevel converter. In the method of controlling a multi-level converter according to one embodiment, a sub-module with a maximum voltage and a sub-module with a minimum voltage are respectively extracted from a plurality of sub-modules. A state change amount for each of the plurality of submodules is determined. When the state change amount is not determined to be 0, the direction of the current flowing through the plurality of sub-modules is detected. A subsequent state of at least one sub-module is determined according to at least one of the state change amount and the direction of the current. Next, in voltage balancing, it is possible to effectively reduce the alignment time for sub-block values ​​when the number of sub-blocks increases.

Description

technical field [0001] The present disclosure relates to a method of controlling a multilevel converter, and, more particularly, to a method of controlling a multilevel converter that improves processing time by employing a switching scheme for voltage balancing. Background technique [0002] In the prior art, a gate switching scheme considering voltage balance is used in multilevel converter systems. In voltage balancing in the prior art, information input during modulation and capacitor voltage information output from each sub-module within an arm are arranged in the order of voltage levels. Use the information processed in this way to select submodules. Specifically, a mechanism is employed in which a sub-module with the highest voltage or the lowest voltage is selected according to the current information of the corresponding arm. [0003] According to the voltage balance in the prior art, it is first determined how many sub-modules output the ON signal, and then it is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/483
CPCH02M7/483H02M7/4835H02M7/155H02M3/158H02M1/42G05F3/02
Inventor 白承泽孙金太许坚朴正旭李熙镇郑容昊李旭和
Owner LSIS CO LTD