New method for estimating flying capacitor voltages in stacked multicell and flying capacitor multicell converters

Arash KHOSHKBAR SADIGH; Gevorg B. GHAREHPETIAN; Seyed Hossein HOSSEINI

doi:10.1631/jzus.C0910559

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New method for estimating flying capacitor voltages in stacked multicell and flying capacitor multicell converters

电子技术 | Updated：2022-08-31

- New method for estimating flying capacitor voltages in stacked multicell and flying capacitor multicell converters
- New method for estimating flying capacitor voltages in stacked multicell and flying capacitor multicell converters
- 信息与电子工程前沿（英文） 2010年11卷第8期页码：654-662
- Affiliations：
  
  1.Faculty of Electrical & Computer Engineering, University of Tabriz, Tabriz 51666, Iran
  2.Department of Electrical Engineering, Amirkabir University of Technology, Tehran 15914, Iran
- Author bio：
  
  E-mail:a.khoshkbar.sadigh@ieee.org
- Funds：
- DOI：10.1631/jzus.C0910559
  中图分类号：
- 收稿：2009-09-10，
  
  修回：2010-07-01，
  
  录用：2010-01-05，
  
  纸质出版：2010-08
- Accepted：
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New method for estimating flying capacitor voltages in stacked multicell and flying capacitor multicell converters[J]. 信息与电子工程前沿（英文）, 2010,11(8):654-662.

Arash KHOSHKBAR SADIGH, Gevorg B. GHAREHPETIAN, Seyed Hossein HOSSEINI. New method for estimating flying capacitor voltages in stacked multicell and flying capacitor multicell converters[J]. Frontiers of Information Technology & Electronic Engineering, 2010, 11(8): 654-662.
New method for estimating flying capacitor voltages in stacked multicell and flying capacitor multicell converters[J]. 信息与电子工程前沿（英文）, 2010,11(8):654-662. DOI： 10.1631/jzus.C0910559.

Arash KHOSHKBAR SADIGH, Gevorg B. GHAREHPETIAN, Seyed Hossein HOSSEINI. New method for estimating flying capacitor voltages in stacked multicell and flying capacitor multicell converters[J]. Frontiers of Information Technology & Electronic Engineering, 2010, 11(8): 654-662. DOI： 10.1631/jzus.C0910559.

摘要

Abstract

Multicell converters are an interesting alternative for medium voltage and high power applications

because of the increased number of output voltage levels and apparent frequency. The two most significant types of multicell converter are the flying capacitor multicell (FCM) converter and its derivative

stacked multicell (SM) converter. Balancing flying capacitor voltages is an important constraint to the proper performance of FCM and SM converters. Thus

observation of the flying capacitor voltages used in active control is valuable

but using voltage sensors for observation increases cost and size of the converter. This paper deals with a new strategy to estimate the flying capacitor voltages of both FCM and SM converters. The proposed strategy is based on a discrete time model of the converter and uses only a load current sensor. The circuit was simulated using PSCAD/EMTDC software and simulation results were presented to validate the effectiveness of the proposed estimation strategy in observing the flying capacitor voltages. Simplicity is the most significant advantage of the proposed strategy

its performance being based on simple equations.

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