A Modular Multilevel Hybrid Distribution Transformer

A modular multi-level distribution transformer technology, applied in the field of transformers, can solve problems such as circulating currents, reduce high-frequency harmonics, and increase compensation capacity

Active Publication Date: 2021-05-28
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The converter essentially adopts a parallel scheme, and there is a circulating current

Method used

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  • A Modular Multilevel Hybrid Distribution Transformer
  • A Modular Multilevel Hybrid Distribution Transformer

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Embodiment Construction

[0017]The objects, technical solutions, and advantages of the present invention will be described in more detail, and the invention will be further described in detail below with reference to the accompanying drawings and examples. The embodiments described herein are merely used to explain the invention and are not intended to limit the invention.

[0018]The modular multi-level mixed distribution transformer according to the present invention employs modular multi-level techniques, which will integrate a modular multi-level converter that integrates a plurality of power unit sub-modules on a multi-winding transformer. Modular multi-level converters include modular multi-level parallel transformers and modular multi-level tandem variables, two shared a DC capacitor, converter uses modular multi-level technology, level A plurality of power unit submodules are connected. The transformer body includes a primary transformer that is wrapped on three upper core columns, which is concentrica...

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Abstract

The invention discloses a modularized multilevel hybrid distribution transformer, which comprises a modularized multilevel converter and a transformer body composed of a plurality of power unit submodules. The converter includes a modular multi-level parallel converter and a modular multi-level series converter, both of which are composed of multiple power unit sub-modules, and the modular multi-level parallel converter is connected to the current compensation winding The current of the power grid is regulated through the principle of magnetic potential balance; the modular multilevel series converter is connected to a voltage compensation winding to adjust the load voltage; the transformer body includes a main transformer, an auxiliary transformer and a filter inductor. Wherein, each phase of the main transformer includes a primary winding, a secondary winding and a current compensation winding, and each phase of the auxiliary transformer includes a series winding and a voltage compensation winding. The use of modular multi-level hybrid distribution transformers can reduce the switching frequency of devices, reduce high-order harmonics, and can be used in higher power applications.

Description

Technical field[0001]The present invention relates to a modular multi-level hybrid distribution transformer, which belongs to the technical field of transformers.Background technique[0002]Conventional distribution transformers are reliable, with basic functions such as voltage level transformation, electrical energy transmission. The development of smart grids has put forward high requirements on the controllability of the distribution transformer. Sands such as Sandeep Bala, Jyoti Sastry, of the ABB research institutions proposed the design idea of ​​mixed distribution transformers. The saliency feature is that the modular multi-level converter is connected to the power distribution transformer, and the high controllability of the power distribution transformer is achieved by the converter transform partial power. Therefore, it is very suitable as the next generation of distribution network intelligent transformer. .[0003]In most of the current distribution scenarios, the load capa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/01H02J3/18
CPCH02J3/01H02J3/1878Y02E40/20Y02E40/30Y02E40/40
Inventor 周堃梁得亮柳轶彬蔡生亮罗雅婷张立石
Owner XI AN JIAOTONG UNIV
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