Multilevel converters for high power AC drives: a review

“…In this scenario, the diodecapacitor, and cascaded H-bridge were proposed to replace the level inverters in medium and highvoltage level applications such as motor drives and Akagi, [11], shows erters, similar to ]. Three different basic multilevel inverter topologies are the neutral point clamped (NPC) or diode clamped [1], the flying capacitor (FC) or capacitor clamped [3] bridge (CHB) [5]. The main drawbacks of NPC inverter topology, with a level number higher than 3, is the necessity of a capacitor voltage balancing control circuit and the high voltage across the clamped diodes.…”

Section: Thismentioning

confidence: 99%

Hybrid Modulation Scheme for Cascaded H-Bridge Inverter Cells

Odeh¹

2014

Nig. J. Tech.

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ABSTRACT ABSTRACT ThisThis This This work work work work proposes a switching technique for cascaded proposes a switching technique for cascaded proposes a switching technique for cascaded proposes a switching technique for cascaded (SCSPWM) scheme is employed in the generation of the gating signals. A sequential switching and base PWM (SCSPWM) scheme is employed in the generation of the gating signals. A sequential switching and base PWM (SCSPWM) scheme is employed in the generation of the gating signals. A sequential switching and base PWM (SCSPWM) scheme is employed in the generation of the gating signals. A sequential switching and base PWM circulation schemes are presented for this circulation schemes are presented for this circulation schemes are presented for this circulation schemes are presented for this conce conce conce concepts, it is now possible to generate equal average switching signal patterns in all the constituting power pts, it is now possible to generate equal average switching signal patterns in all the constituting power pts, it is now possible to generate equal average switching signal patterns in all the constituting power pts, it is now possible to generate equal average switching signal patterns in all the constituting power semiconductor switches. This results in equal switching loss dissipation and equal power sharing in semiconductor switches. This results in equal switching loss dissipation and equal power sharing in semiconductor switches. This results in equal switching loss dissipation and equal power sharing in semiconductor switches. This results in equal switching loss dissipation and equal power sharing in inverter modules; and therefore tec inverter modules; and therefore tec inverter modules; and therefore tec inverter modules; and therefore technically modularizes the cascaded system. A 4 hnically modularizes the cascaded system. A 4 hnically modularizes the cascaded system. A 4 hnically modularizes the cascaded system. A 4 used to exemplify the proposed switching technique. Outlines with switching functions are given for the used to exemplify the proposed switching technique. Outlines with switching functions are given for the used to exemplify the proposed switching technique. Outlines with switching functions are given for the used to exemplify the proposed switching technique. Outlines with switching functions are given for the modulation strategy. For a modulation index of 0.9, a THD value modulation strategy. For a modulation index of 0.9, a THD value modulation strategy. For a modulation index of 0.9, a THD value modulation strategy. For a modulation index of 0.9, a THD value waveform of the exemplanary 4 waveform of the exemplanary 4 waveform of the exemplanary 4 waveform of the exemplanary 4----cell cascaded configuration. With these pts, it is now possible to generate equal average switching signal patterns in all the constituting power pts, it is now possible to generate equal average switching signal patterns in all the constituting power pts...

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“…In addition, ML converter offers higher voltage and power capability, which advocates the trend of 'Multi-MW' wind turbine [1,33]. Another advantage is that switching losses are smaller in ML converter than two-level PWM converter by 25% [34].…”

Section: Multilevel Convertersmentioning

confidence: 99%

Wind Energy Conversion System from Electrical Perspective—A Survey

Kim¹,

Lu²

2010

SGRE

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This paper focuses on the wind energy conversion system (WECS) with the three main electrical aspects: 1) wind turbine generators (WTGs), 2) power electronics converters (PECs) and 3) grid-connection issues. The current state of wind turbine generators are discussed and compared in some criteria along with the trends in the current WECS market, which are 'Variable Speed', 'Multi-MW' and 'Offshore'. In addition, the other crucial component in the WECS, PECs will be discussed with its topologies available in the current WECS market along with their modulation strategies. Moreover, three main issues of the WECS associating with the grid-connection, fault-ride through (FRT) capability, harmonics/interharmonics emission and flicker, which are the power quality issues, will be discussed due to the increasing responsibility of WECS as utility power station. Some key findings from the review such as the attractiveness of BDFRG are presented in the conclusion of this paper.

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Multilevel converters for high power AC drives: a review

Cited by 94 publications

References 13 publications

A comparison of high-power converter topologies for the implementation of FACTS controllers

A comparison of high-power converter topologies for the implementation of FACTS controllers

Hybrid Modulation Scheme for Cascaded H-Bridge Inverter Cells

Wind Energy Conversion System from Electrical Perspective—A Survey

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