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Integrated filter inductance transformer

A technology for filtering inductors and transformers, applied in the field of transformers, can solve problems such as harmonic pollution, and achieve the effects of good filtering, cost reduction, and good harmonic magnetic flux suppression effect.

Active Publication Date: 2009-12-09
HUNAN UNIV +2
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  • Abstract
  • Description
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Problems solved by technology

[0003] In order to solve the technical problem of serious harmonic pollution in the existing power system, the invention provides an integrated filter inductance transformer

Method used

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Embodiment Construction

[0013] see figure 1 and figure 2 , figure 1 The schematic diagram of the structure of the winding of the LC resonant circuit integrating the 5th and 7th characteristic harmonics. figure 1 Among them, 6 and 8 are primary windings, 5 and 7 are secondary windings; 1 and 3 are 5 times integrated filter windings; 2 and 4 are 7 times integrated windings. figure 2 Among them, 8, 10, and 12 are primary windings, 7, 9, and 11 are secondary windings; 1, 3, and 5 are 5th integrated filter windings; 2, 4, and 6 are 7th integrated windings. The low-voltage winding of the transformer is placed close to the inner side of the iron core, the high-voltage winding is placed outside the low-voltage winding, and the 5th and 7th filter inductor windings are arranged on the same iron core as the high-voltage winding and the low-voltage winding. Each filter winding is two anti-parallel symmetrical interleaved windings. This kind of coil can be divided into some identical units in terms of leakag...

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Abstract

The invention disclosed an integrated filter inductance transformer, comprising a primary winding, a secondary winding, and LC resonant circuits of each winding characteristic harmonics, wherein the reactance L of the resonant circuits is a two-segment adverse-parallel symmetric interleaving winding which is wound with the primary winding and the secondary winding on the same iron core in a up-down symmetry manner. In the invention, the LC resonant circuits of each winding characteristic harmonics can eliminate the harmonic flux of the iron core, and prevent the harmonics from passing back, thereby realizing the function of filtering the primary winding harmonics; meanwhile, the transformer also has the function of reactive power compensation.

Description

technical field [0001] The invention relates to a transformer, in particular to an integrated filter inductance transformer. Background technique [0002] With the rapid development of my country's industry, the demand for electricity is increasing, and the load on the power grid is also becoming heavier; at the same time, high-voltage direct current transmission, electrified railway, urban light rail, electrolytic chemical industry, electrolytic metallurgy, steel, papermaking and other industrial fields A large number of power harmonics are generated; the majority of residents' life electricity also generates a large number of power harmonics. This deteriorates the power supply quality of the grid to a certain extent, and also affects other users under the same grid. In the power system, harmonic pollution has become a major public hazard. In order to solve this problem, passive filtering and active filtering are generally used, that is, corresponding harmonic suppression ...

Claims

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Application Information

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IPC IPC(8): H01F27/34H01F30/06
Inventor 罗隆福张志文许加柱董书大熊芝耀邵鹏飞
Owner HUNAN UNIV
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