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Multilevel power converter or inverter arrangement using h bridges

A power converter, multi-level technology, applied in the direction of output power conversion device, irreversible AC power input conversion to DC power output, irreversible DC power input conversion to AC power output, etc., can solve the total harmonic Distortion can not meet the optimal requirements and other issues

Inactive Publication Date: 2012-07-11
GAMESA INNOVATION & TECH SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

where the Total Harmonic Distortion (THD) is not optimal for such a system

Method used

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  • Multilevel power converter or inverter arrangement using h bridges
  • Multilevel power converter or inverter arrangement using h bridges
  • Multilevel power converter or inverter arrangement using h bridges

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Embodiment Construction

[0023] figure 1 A device with m stages connected in parallel for power generation and power conversion is shown, where m is a natural number. In many applications, large amounts of generated power need to be handled. Non-limiting examples include direct drive applications, where the wind turbine shaft transmits power directly from the rotor to the electrical power converter. To handle large-scale power, multiple electrical converters are arranged in parallel. Each of the m stages is responsible for handling a portion of the total power so as not to exceed their normal ratings, especially those associated with semiconductor switches, to avoid component damage.

[0024] The generator (gen) is preferably a wind turbine. The stator windings from the converter are connected to a second voltage source converter (VSC2), which is constructed as a multilevel H-bridge. A grid filter can be placed at the output of the stator windings to limit dv / dt, which is known as the larger value...

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Abstract

Multilevel voltage arrangement having a transformer and a power converter or inverter comprises one or more common DC links connectable to a power source, and said arrangement comprises one first set of H bridges connected to said common DC link, wherein each of said H bridges comprises at least two nodes connected to the ends of wirings at the primary side of a transfer, wherein control means are configured for controlling H bridges so as to achieve a multilevel voltage signal between the first node and the second node of said H bridges.

Description

technical field [0001] The present invention relates to a multilevel power converter topology and arrangement for a generator, preferably in wind turbine applications. Background technique [0002] Various voltage source converters are known that employ an H-bridge topology. H-bridges are used to obtain multilevel waveforms. The H-bridge is driven by a number of different switching elements. The open and closed state of the switch determines the output voltage of the load winding connected to it. However, their use is limited to DC / DC converter system applications or single-phase AC applications. [0003] For applications related to series active filters, dynamic voltage restorers and static synchronous compensators (statcoms), known three-phase applications with H-bridge topologies and architectures employ AC side isolation transformer application structures. [0004] These applications have been described in various publications. Series active filters can be found in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/36H02J3/28H02M5/458
CPCH02M7/49H02M7/483H02M7/5387H02P27/14H02M1/12H02M1/32H02M5/4585H02M7/219H02M7/23H02M7/493H02P2201/03H02P2101/15H02M5/458
Inventor 米格尔·阿尔瓦尔·马约尔安德烈斯·阿古多·阿拉克
Owner GAMESA INNOVATION & TECH SA