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An Equivalent Air Gap Adjustable Reactor

A technology for adjusting reactance and air gap, which is applied in the direction of variable inductors, inductors, variable transformers, etc., can solve the problems of insufficient attention, large reactance adjustment range, slow response speed, etc., and achieve simplified structure, Simple wiring and improved reliability

Active Publication Date: 2017-06-23
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it has a transformer-like iron core like MCR, it has high stability and reliability, and the reactance adjustment range is large and the harmonics are small, but the response speed of the mechanical device to control the size of the air gap is slower than that of MCR and TCR, so Has not received enough attention and promotion application

Method used

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  • An Equivalent Air Gap Adjustable Reactor
  • An Equivalent Air Gap Adjustable Reactor
  • An Equivalent Air Gap Adjustable Reactor

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A schematic diagram of the structure of the equivalent air gap adjustable reactor described in the present invention is as follows: figure 1 As shown, it includes iron core 1, AC working winding 2 and several groups of DC equivalent air gap windings; the iron core 1 is a closed ring structure, and a rectangular coordinate system is established with the center point of the iron core 1 as the origin, and the two sides of the iron core 1 are The Y axis is symmetrical; the middle part of the iron core 1 on the left side of the Y axis is wound with an AC working winding 2, and the middle part of the iron core 1 on the right side of the Y axis is provided with several pairs of iron core holes 4, and the paired iron core holes are arranged symmetrically on both sides of the X axis. A set of DC equivalent air-gap windings are wound in two adjacent core holes, and each set of DC equivalent air-gap windings are reversely connected in series; in the X-axis direction and Y-axis dire...

Embodiment 2

[0029] The structure diagram of an equivalent air gap adjustable reactor described in the present invention is as follows: figure 2 As shown, compared with the first embodiment, the structure has eight circular iron core holes 4 for winding four sets of DC equivalent air gap windings, so as to generate a more uniform equivalent air gap. Figure 5 For the second embodiment, four sets of DC equivalent air gap windings: 5A, 5B, 5C and 5D. Four DC equivalent air gap windings such as Figure 5 The method shown is connected in reverse series, and there are many combinations of winding methods. Figure 5 Two winding methods are given. The principle of winding is that the AC magnetic potentials induced in the four sets of DC equivalent air gap windings cancel each other out. figure 2 The middle shaded part is the flow range of the local magnetic flux 5, and the resulting local saturation can be regarded as an equivalent air gap.

Embodiment 3

[0031] A schematic diagram of the structure of the equivalent air gap adjustable reactor described in the present invention is as follows: image 3 As shown, compared with the structure of the first embodiment, two groups of square core holes 4 of the same size are arranged longitudinally on one side of the core 1, and the vertical distance between the group of square core holes 4 in the middle and the X axis is zero; that is The cross-sectional area of ​​the middle iron core hole 4 after merging is twice that of the upper iron core hole 4 or the lower iron core hole 4 . A set of DC equivalent air gap windings is wound on adjacent square core holes 4, that is, two sets of DC equivalent air gap windings are required. If the two square iron core holes 4 in the middle are separated, the magnetic flux generated between the two square iron core holes 4 due to the winding mode of the DC equivalent air gap winding cancels each other, and the magnetic flux is zero, which is equivalent...

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Abstract

The invention discloses an equivalent air gap adjustable reactor. The equivalent air gap adjustable reactor comprises an iron core, an alternating current working winding and a plurality of groups of direct current equivalent air gap windings. The iron core is of a closed ring structure, a rectangular coordinate system is established with the central point of the iron core serving as an origin, both sides of the iron core is symmetrical along the Y-axis, the alternating current working winding is wound on the middle portion of the left side of the iron core, the middle portion of the right side of the iron core is provided with a plurality of pairs of holes symmetrically arranged on both sides of the X axis, a group of direct current equivalent air gap windings is wound on the adjacent two holes, and all the groups of direct current equivalent air gap windings are oppositely connected to one another in series and wound in the X-axis direction or the Y-axis direction. The equivalent air gap adjustable reactor uses the local saturation phenomenon produced by controlling the intensity of the direct current as equivalent air gap to replace a mechanical unit for controlling the air gap, thereby simplifying the structure of the iron core, reducing the response time of the reactor, ensuring the reactance linearity of the reactor and obtaining a large adjustment range.

Description

technical field [0001] The invention relates to a reactor, in particular to an equivalent air gap adjustable reactor. Background technique [0002] In high-voltage and ultra-high-voltage power grids, the purpose of reactive power compensation is to support the voltage of the grid pivot point, improve the stability of the grid, increase the transmission capacity of the line and reduce the line loss, suppress the power oscillation of the grid and the power frequency overvoltage, and adjust the voltage. And optimize reactive power flow, etc. Reactive power balance is an important guarantee for the safe, stable and economical operation of the power grid, especially for the ultra-high voltage long-distance transmission network. Studies have proved that the capacity of the adjustable reactor can not only change with the size of the transmission power, smoothly adjust the reactive power of the system, realize flexible power transmission, but also suppress power frequency and opera...

Claims

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Application Information

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IPC IPC(8): H01F29/00H01F29/14H01F27/24H01F27/30H02P13/12
Inventor 林克曼李念林明耀
Owner SOUTHEAST UNIV
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