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Twelve-pulse wave induction filter transformer structure

A twelve-pulse, transformer technology, applied in the field of transformers, can solve the problems of transformer body loss and other problems, achieve the effect of reducing loss, improving power factor of grid side, and improving service life

Pending Publication Date: 2022-07-12
CHINA UNIV OF MINING & TECH
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  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to provide a twelve-pulse wave induction filter transformer structure, which is used to solve the problem of loss of the transformer body caused by harmonics flowing through the transformer in the existing traditional DY-DD twelve-pulse wave filter scheme

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  • Twelve-pulse wave induction filter transformer structure
  • Twelve-pulse wave induction filter transformer structure
  • Twelve-pulse wave induction filter transformer structure

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Embodiment Construction

[0027] In order to facilitate those skilled in the art to understand the technical solutions of the present invention more clearly, the structure of a novel 12-pulse wave induction filter transformer proposed by the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the accompanying drawings are all in simplified form and in inaccurate scales, and are only used to facilitate and clearly assist in explaining the technical solutions of the present invention.

[0028] like figure 2 As shown in the arrangement diagram of each winding of the transformer main body, each winding of the structure main body of the twelve-pulse induction filter transformer is arranged from the inside to the outside as the valve side winding 13 , the filter winding 14 and the grid side winding 12 respectively.

[0029] like figure 1 As shown in the topological structure diagram of the twelve-pulse ind...

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Abstract

The invention relates to a twelve-pulse-wave induction filtering transformer structure, and belongs to the technical field of transformers. The transformer comprises two transformer main bodies and two identical six-pulse rectifiers, wherein a circuit of each transformer main body comprises a valve side winding, a filter winding and a network side winding which are arranged from inside to outside; the network side windings of the two transformer main bodies are connected in parallel with a power grid power supply, the valve side windings of the two transformer main bodies are respectively connected with a six-pulse rectifier, and the two filter windings are connected in parallel and then connected with a tuned filter; and the winding connection modes of the two transformer units are respectively D, yn11 and d0 structures and D, yn11 and yn11 structures. When the rectification system generates harmonic current, main fifth and seventh harmonics are counteracted in the parallel filter winding, and eleventh and thirteenth harmonics are counteracted by opposite current generated by the tuned filter. Compared with a traditional double-unit transformer, damage to a transformer body caused by circulation of harmonic waves in the transformer is reduced.

Description

technical field [0001] The invention relates to a structure of a twelve-pulse induction filter transformer, belonging to the technical field of transformers, in particular to an induction filter transformer formed by connecting two transformers in parallel, which is suitable for an AC-DC rectifier system. Background technique [0002] The wide application of power electronic devices in the power grid inevitably brings problems such as harmonic pollution to the power grid system. The use of high-power converter equipment will bring a large number of harmonics. If no effective measures are taken, it will cause serious distortion of the voltage and current of the grid, reduce power quality, damage power distribution and electrical equipment, and cause safety accidents. [0003] Traditional power filtering can effectively filter harmonics and solve the problem of power quality. Usually, passive filters, active filters or hybrid filters are used on the grid side. However, tradit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/04H02M1/12H02J3/00H02J3/01H02J3/18H01F30/12H01F27/28H01F27/30
CPCH02M7/04H02M1/126H02J3/00H02J3/01H02J3/1821H01F30/12H01F27/28H01F27/306Y02E40/40
Inventor 张晓窦照宇常灿琦李德路李昌易
Owner CHINA UNIV OF MINING & TECH
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