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Harmonic suppressing energy-saving transformer

A technology of energy-saving transformers and transformers, applied in harmonic reduction devices, transformer/inductor coils/windings/connections, AC networks to reduce harmonics/ripples, etc., can solve problems such as high cost, improve impact, weaken harmonics wave current, reducing the effect of stray loss

Inactive Publication Date: 2009-09-30
SOUTHEAST UNIV
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AI Technical Summary

Problems solved by technology

However, since two transformers with the same capacity must be used and a harmonic inverter circuit is added, the cost is relatively high

Method used

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Experimental program
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Effect test

Embodiment Construction

[0023] Figure 1 is a schematic diagram of the secondary side winding connection of a slow harmonic energy-saving transformer. The primary side winding of the transformer adopts a delta connection, and the secondary side winding of the transformer adopts a double-output meander connection, that is, the secondary side winding is divided into a first group of windings A1 and a second group of windings A2, and the first group of The winding A1 includes the first phase winding a1, the second phase winding b1 and the third phase winding c1; the second group winding A2 includes the fourth phase winding a2, the fifth phase winding b2 and the sixth phase winding c2; wherein the first group winding The tail end a1a of the upper part of the first phase winding a1 in A1 is reversely connected in series with the head end b1b of the lower part of the second phase winding b1 to form the first output phase a11, and so on to obtain the second output phase b11 and the third Output phase c11, co...

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Abstract

A mild harmonic energy-saving transformer is provided, which relates to a power transformer based on the phase shift principle and adapted to inhibit harmonic waves and reduce energy consumption. The primary winding of the transformer is adapted to the D connection and the secondary winding is adapted to the Z connection with double outputs, that is, the secondary winding is divided into a first group of winding (A1) and a second group of winding (A2). The first group of winding (A1) comprises a first phase winding (a1), a second phase winding (b1) and a third phase winding (c1). The second group of winding (A2) comprises a fourth phase winding (a2), a fifth phase winding (b2) and a sixth phase winding (c2). The mild harmonic energy-saving transformer can inhibit the third harmonic and eliminate the fifth, seventh, seventeenth and nineteenth times harmonics; weaken the harmonic current and the harmonic current-induced coupled magnetic flux of the first and the secondary windings and the current circulation of the first side winding; reduce the stray loss of the transformer; and significantly improve the influence of the secondary harmonic on the primary power network.

Description

technical field [0001] The invention relates to a slow harmonic energy-saving transformer, in particular to a power transformer with harmonic suppression and energy saving based on the principle of phase shift. Background technique [0002] In the production, transmission, conversion and use of electric power, there will be some sine wave components whose frequency is an integer multiple of the fundamental frequency (in my country, the industrial power frequency 50Hz is taken as the fundamental frequency), also known as high-order harmonics. The generation of harmonics is mainly caused by the following reasons: (1) Harmonics are generated in the power transmission and distribution system: in the power transmission and distribution system, the harmonics are mainly generated by the power transformer, due to the saturation of the transformer core, the nonlinearity of the magnetization curve, and the Economical considerations are taken into account when designing transformers, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F27/28H02J3/01
CPCY02E40/40
Inventor 林鹤云郭健杨成峰
Owner SOUTHEAST UNIV
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