Multilevel converter with energy storage

An energy storage and multi-level technology, applied in the direction of converting irreversible DC power input to AC power output, output power conversion device, AC power input conversion to DC power output, etc., can solve the problem of shortened lifespan and loss of storage equipment increase, working temperature rise, etc., to increase the service life and performance

Inactive Publication Date: 2017-09-29
ABB POWER GRIDS SWITZERLAND AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This will lead to increased wear and tear, higher operating temperature and shorter lifetime of the storage device

Method used

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  • Multilevel converter with energy storage
  • Multilevel converter with energy storage
  • Multilevel converter with energy storage

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Embodiment Construction

[0025] Embodiments will now be described more fully hereinafter with reference to the accompanying drawings, in which some embodiments are shown. However, other embodiments in many different forms are possible within the scope of this disclosure. Rather, the following embodiments are provided by way of example so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Like numbers refer to like elements throughout the specification.

[0026] The present invention uses so-called mirrored cell pairs herein in a multilevel power converter with cascaded chain-link connected cells. will now refer to figure 1 and figure 2 Explain what mirror cell pairs mean.

[0027] figure 1 Two half-bridge cells are shown connected in a standard manner for cascaded chain-link connected cells in a multilevel power converter. figure 1 used as figure 2 Comparison of the circuit diagrams of the mirrored cell pairs show...

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Abstract

The invention discloses a multilevel converter with energy storage. The present disclosure relates to a multilevel power converter 1 comprising at least one phase leg. The phase leg comprises a plurality of cascaded chain link connected cells 2, each cell comprising a capacitor 3 and two semiconductor switches 5 in series, each with an anti-parallel connected diode 6. The plurality of cascaded chain link connected cells comprises first and second cells 2a and 2b which form a mirrored cell-pair such that the two semiconductor switches of each of the first and second cells are all connected in series with each other. The converter further comprises an energy storage 4 connected between the first and second cells.

Description

technical field [0001] The present disclosure relates to a multilevel power converter including at least one phase leg. A phase leg comprises a plurality of cascaded chain-link connected cells, each cell comprising a capacitor and two semiconductor switches in series, each semiconductor switch having a diode connected in anti-parallel. Background technique [0002] Modular multilevel converters have become popular due to their high efficiency, modularity and scalability, and ability to generate voltage waveforms with low harmonic content, which effectively reduces the need for large AC filters. [0003] Several modular multilevel converter topologies exist, of which M2LC (also known as MMLC and MMC) is one of the most popular topologies, especially in high voltage direct current (HVDC) applications and motor drives etc. [0004] WO2010 / 124706 and WO2011 / 060823 disclose conventional half-bridge converter units and H-bridge converter units for M2LC, with a battery connected t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/49H02M7/797
CPCH02M7/49H02M7/797H02M7/4835H02J3/32H02J7/345H02J7/00H02M1/12H02M7/219
Inventor T·滕纳A·拉奇奇L·哈内弗斯G·卡米里斯
Owner ABB POWER GRIDS SWITZERLAND AG
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