A three-phase anti-resonance voltage transformer

A resonant voltage, transformer technology, applied in the direction of inductors, transformers/inductor cores, transformers, etc., can solve the problems of inconsistent three-phase excitation characteristics, high cost, large size, etc.

Active Publication Date: 2021-09-10
GUIZHOU POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are disadvantages such as large volume, high c

Method used

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  • A three-phase anti-resonance voltage transformer
  • A three-phase anti-resonance voltage transformer
  • A three-phase anti-resonance voltage transformer

Examples

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Embodiment 1

[0036] refer to Figure 1~4 , which is the first embodiment of the present invention, which provides a three-phase anti-resonance voltage transformer, which includes a three-column core 100, and the three-column core 100 has a vertically arranged first column T and a second column K and the third column M, and the three-column core 100 has an equilateral triangular structure in an upper perspective.

[0037] It also includes a first coil 201 , a second coil 202 and a third coil 203 wound on the first column T, the second column K and the third column M respectively.

[0038] Further, the three-pillar core 100 includes a first core 101, a second core 102, and a third core 103. Specifically, the first core 101, the second core 102, and the third core 103 have the same structure and size, and the first core 101 1. The second iron core 102 and the third iron core 103 are all in a square ring structure, and the adjacent sides of the three overlap each other to enclose an equilater...

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PUM

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Abstract

The invention discloses a three-phase anti-resonance voltage transformer, which comprises a three-column iron core, which has a first column, a second column and a third column, and the three-column iron core is distributed in an equilateral triangle structure; and a first coil, a second coil The second coil and the third coil, the first coil, the second coil and the third coil are respectively wound on the first post, the second post and the third post; the present invention has compact structure, small volume, light weight and Save raw materials; the excitation current of the three-phase voltage transformer is small, and the no-load loss is low, which reduces the no-load error of the product and then reduces the overall error of the product, improves the accuracy, and avoids the problem of large three-phase error deviation; it can be passed Enlarging the cross-section of the iron core, increasing the number of turns of the winding, and other methods greatly increase the zero-sequence impedance and improve the performance of anti-ferromagnetic resonance; greatly improve the accuracy of the product, and meet the latest requirements of the power sector to improve the error margin; further reduce the occurrence of ferromagnetic The possibility of resonance has played a double anti-resonance effect.

Description

technical field [0001] The technical field of the invention relates to a voltage transformer structure, in particular to a three-phase anti-resonance voltage transformer. Background technique [0002] At present, the distribution network of 35kV and below in my country mostly adopts the neutral point non-effectively grounded system, and the phenomenon of overvoltage in the system is very common. If there are no preventive measures, it will cause damage to power equipment and cause large-scale power outages. According to the operation experience of the power grid, there are many cases of ferromagnetic resonance caused by the saturation of the iron core of the electromagnetic voltage transformer in the neutral point ungrounded system. [0003] Under certain excitation conditions, the saturation inductive reactance of the electromagnetic voltage transformer core becomes nonlinearly smaller, and ferromagnetic resonance occurs when the inductive reactance is equal to the capaciti...

Claims

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Application Information

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IPC IPC(8): H01F27/24H01F27/26H01F27/28H01F27/30H01F27/32H01F27/34H01F38/26
CPCH01F27/24H01F27/263H01F27/2823H01F27/306H01F27/324H01F27/34H01F27/341H01F38/26
Inventor 张广梅贺春安刘斌姜小剑朱皓王磊黄力赵武刚任杰李洪邓朴文忠进赵圆圆陈航张祥雄王翔刘志斌
Owner GUIZHOU POWER GRID CO LTD
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