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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 life, high working temperature High, storage device loss and other issues, to achieve the effect of increasing service life and performance

Inactive Publication Date: 2019-12-17
ABB POWER GRIDS SWITZERLAND AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Examples

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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 the meaning of a mirror cell pair.

[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 pair...

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Abstract

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 connected in series, each semiconductor switch 5 having a diode 6 connected in anti-parallel. The plurality of cascaded chain-link connected cells comprises a first cell 2a and a second cell 2b forming a mirrored cell pair such that both semiconductor switches of each of the first cell and the second cell are connected in series with each other. The converter also comprises an energy store 4 connected between the first unit and the second unit.

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 Patents(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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