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Modular Multilevel Inverter with New Modulation Method and Its Application to Photovoltaic Grid-Connected Generator

This paper proposed an improved phase disposition pulse width modulation (PDPWM) for a modular multilevel inverter which is used for Photovoltaic grid connection. This new modulation method is based on selective virtual loop mapping, to achieve dynamic capacitor voltage balance without the help of a... Full description

Journal Title: IEEE Transactions on Power Electronics November 2013, Vol.28(11), pp.5063-5073
Main Author: Jun Mei
Other Authors: Bailu Xiao , Ke Shen , Tolbert, L. M , Jian Yong Zheng
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0885-8993 ; E-ISSN: 1941-0107 ; DOI: 10.1109/TPEL.2013.2243758
Link: https://ieeexplore.ieee.org/document/6428710
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recordid: ieee_s6428710
title: Modular Multilevel Inverter with New Modulation Method and Its Application to Photovoltaic Grid-Connected Generator
format: Article
creator:
  • Jun Mei
  • Bailu Xiao
  • Ke Shen
  • Tolbert, L. M
  • Jian Yong Zheng
subjects:
  • Capacitors
  • Pulse Width Modulation
  • Voltage Control
  • Inverters
  • Indexes
  • Sorting
  • Dynamic Voltage Balance
  • Modular Multilevel Converter (Mmc)
  • Phase Disposition Pulse Width Modulation (Pdpwm)
  • Photovoltaic (Pv) Grid-Connected
  • Selective Virtual Loop Mapping (Svlm)
  • Engineering
ispartof: IEEE Transactions on Power Electronics, November 2013, Vol.28(11), pp.5063-5073
description: This paper proposed an improved phase disposition pulse width modulation (PDPWM) for a modular multilevel inverter which is used for Photovoltaic grid connection. This new modulation method is based on selective virtual loop mapping, to achieve dynamic capacitor voltage balance without the help of an extra compensation signal. The concept of virtual submodule (VSM) is first established, and by changing the loop mapping relationships between the VSMs and the real submodules, the voltages of the upper/lower arm's capacitors can be well balanced. This method does not requiring sorting voltages from highest to lowest, and just identifies the MIN and MAX capacitor voltage's index which makes it suitable for a modular multilevel converter with a large number of submodules in one arm. Compared to carrier phase-shifted PWM (CPSPWM), this method is more easily to be realized in field-programmable gate array and has much stronger dynamic regulation ability, and is conducive to the control of circulating current. Its feasibility and validity have been verified by simulations and experiments.
language: eng
source:
identifier: ISSN: 0885-8993 ; E-ISSN: 1941-0107 ; DOI: 10.1109/TPEL.2013.2243758
fulltext: fulltext
issn:
  • 0885-8993
  • 08858993
  • 1941-0107
  • 19410107
url: Link


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titleModular Multilevel Inverter with New Modulation Method and Its Application to Photovoltaic Grid-Connected Generator
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subjectCapacitors ; Pulse Width Modulation ; Voltage Control ; Inverters ; Indexes ; Sorting ; Dynamic Voltage Balance ; Modular Multilevel Converter (Mmc) ; Phase Disposition Pulse Width Modulation (Pdpwm) ; Photovoltaic (Pv) Grid-Connected ; Selective Virtual Loop Mapping (Svlm) ; Engineering
descriptionThis paper proposed an improved phase disposition pulse width modulation (PDPWM) for a modular multilevel inverter which is used for Photovoltaic grid connection. This new modulation method is based on selective virtual loop mapping, to achieve dynamic capacitor voltage balance without the help of an extra compensation signal. The concept of virtual submodule (VSM) is first established, and by changing the loop mapping relationships between the VSMs and the real submodules, the voltages of the upper/lower arm's capacitors can be well balanced. This method does not requiring sorting voltages from highest to lowest, and just identifies the MIN and MAX capacitor voltage's index which makes it suitable for a modular multilevel converter with a large number of submodules in one arm. Compared to carrier phase-shifted PWM (CPSPWM), this method is more easily to be realized in field-programmable gate array and has much stronger dynamic regulation ability, and is conducive to the control of circulating current. Its feasibility and validity have been verified by simulations and experiments.
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This paper proposed an improved phase disposition pulse width modulation (PDPWM) for a modular multilevel inverter which is used for Photovoltaic grid connection. This new modulation method is based on selective virtual loop mapping, to achieve dynamic capacitor voltage balance without the help of an extra compensation signal. The concept of virtual submodule (VSM) is first established, and by changing the loop mapping relationships between the VSMs and the real submodules, the voltages of the upper/lower arm's capacitors can be well balanced. This method does not requiring sorting voltages from highest to lowest, and just identifies the MIN and MAX capacitor voltage's index which makes it suitable for a modular multilevel converter with a large number of submodules in one arm. Compared to carrier phase-shifted PWM (CPSPWM), this method is more easily to be realized in field-programmable gate array and has much stronger dynamic regulation ability, and is conducive to the control of circulating current. Its feasibility and validity have been verified by simulations and experiments.

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abstract

This paper proposed an improved phase disposition pulse width modulation (PDPWM) for a modular multilevel inverter which is used for Photovoltaic grid connection. This new modulation method is based on selective virtual loop mapping, to achieve dynamic capacitor voltage balance without the help of an extra compensation signal. The concept of virtual submodule (VSM) is first established, and by changing the loop mapping relationships between the VSMs and the real submodules, the voltages of the upper/lower arm's capacitors can be well balanced. This method does not requiring sorting voltages from highest to lowest, and just identifies the MIN and MAX capacitor voltage's index which makes it suitable for a modular multilevel converter with a large number of submodules in one arm. Compared to carrier phase-shifted PWM (CPSPWM), this method is more easily to be realized in field-programmable gate array and has much stronger dynamic regulation ability, and is conducive to the control of circulating current. Its feasibility and validity have been verified by simulations and experiments.

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doi10.1109/TPEL.2013.2243758
date2013-11