Auto-transformer with variable specific voltage regulation and current compensation and method thereof

An autotransformer and current compensation technology, applied in the field of transformers, can solve problems such as difficulty in meeting smart grids, high damage rate of switching devices, uncontrollable grid current and custom voltage, etc., to solve power quality problems and facilitate replacement , Engineering design is easy to achieve the effect

Active Publication Date: 2020-12-11
XI AN JIAOTONG UNIV +1
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and provide an autotransformer and method for variable ratio voltage regulation and current compensation, which are used to solve the problem of grid current and self-defined voltage of traditional distribution transformers in the prior art. There is no controllability, it is difficult to meet the needs of smart grids, and the technical problems of high damage rate of switching devices

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  • Auto-transformer with variable specific voltage regulation and current compensation and method thereof
  • Auto-transformer with variable specific voltage regulation and current compensation and method thereof
  • Auto-transformer with variable specific voltage regulation and current compensation and method thereof

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[0033] The present invention is described in further detail below in conjunction with accompanying drawing:

[0034] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, and therefore cannot be construed as limiting the present invention; the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be construed as indicating or implying relative importance; in addition, unless otherwise Clearly stipulated and limited, the terms "installation"...

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Abstract

The invention relates to an auto-transformer with variable specific voltage regulation and current compensation and a method thereof, a bidirectional soft switch (formed by inversely connecting an IGBT and a diode in parallel) is adopted to replace a mechanical switch, and the variable-ratio control on the voltage of a power grid is realized by changing the duty ratio D set by a PWM controller andthe transformation ratio N1 / N2 of the transformer. Furthermore, under the condition that power grid voltage fluctuation is caused by various reasons on the power grid side, the voltage is maintainednot to be distorted. The variable specific voltage regulation current compensation hybrid autotransformer based on the active power filter is a novel transformer, combines a traditional transformer with a power electronic technology, has good controllability, and can be used for solving the ubiquitous problem of electric energy quality at present. According to the transformer, stepless voltage regulation voltage compensation and current compensation functions of a voltage side can be realized at the same time.

Description

【Technical field】 [0001] The invention belongs to the technical field of transformers, and in particular relates to an autotransformer and a method for variable-ratio voltage regulation and current compensation. 【Background technique】 [0002] With the development of smart grid and the development of power electronics technology, on the one hand, more and more smart devices are introduced into the network, but with it, it will also cause many problems, such as voltage sag or swell and The power factor is reduced. In the distribution network, the distribution transformer plays a vital role. The traditional distribution transformer has no controllability in terms of grid current and custom voltage, and cannot meet the needs of the smart grid. [0003] In addition, the existing distribution transformers often directly adopt PWM inverter on the primary side to modulate the voltage amplitude to realize the control of the grid voltage. However, the existing distribution transfor...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/12H02J3/01H02P13/06
CPCH02J3/12H02J3/01H02P13/06Y02E40/20
Inventor 李大伟吴子豪王辰曦唐露甜梁得亮柳轶彬张立石蔡生亮高亚晨周堃
Owner XI AN JIAOTONG UNIV
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