JP4034400B2 - Stationary induction equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a static induction device such as a power transformer or a reactor, and more particularly to a static induction device in which the balance between insulation performance and price is optimized.
[0002]
[Prior art]
Conventionally, static induction devices such as power transformers and reactors have a major problem that it is difficult to satisfy the three aspects of improvement in insulation performance, size reduction, and price reduction. In general, in order to improve the insulation performance, means for expanding the insulation dimension to the ground electrode surface such as a low voltage winding or an iron core opposite to the high voltage winding, or inserting a U-shaped spacer in a part of the high voltage winding or insulating There are ways to add paper.
[0003]
[Problems to be solved by the invention]
However, the means for enlarging the insulation dimension as described above improves the insulation performance, but has the problem of increasing the size of the static induction device and increasing the material used, leading to an increase in price. In addition, the means of adding a U-shaped spacer or insulating paper to a part of the winding improves the insulation performance, but it takes a lot of time to attach the U-shaped spacer or insulating paper to the winding. There is a problem that leads to an increase.
[0004]
For this reason, conventionally, a means for adding a U-shaped spacer or insulating paper to a part of the winding is usually attached to several sections from the line end of the high-voltage winding in order to suppress an increase in price.
[0005]
As described above, conventional induction devices such as power transformers and reactors have a problem that it is extremely difficult to satisfy both the improvement of insulation performance and the reduction in price.
[0006]
The present invention has been made in consideration of the above-described circumstances, and an object thereof is to provide a stationary induction device having a configuration in which both improvement in insulation performance and price reduction are most balanced.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present inventor attaches a spacer or insulating paper to a section of various ranges from the line end of the high-voltage winding or around the line end, and the range in which the balance between the insulation performance and the price is optimal. As a result of comparing and examining the above, it was found that the balance between the insulation performance and the price becomes optimum when the range is set to 10 to 30% of the total stack length.
[0008]
That is, in the static induction device in which the line end of the high-voltage winding is disposed in the center with respect to the stacking direction and the ground electrode is disposed on the inner diameter side of the high-voltage winding, the line end of the high-voltage winding is centered. A section in the range of 10 to 30% of the total stack length is configured by attaching a spacer for insulation reinforcement on the inner diameter side, and the spacer is attached to the key spacer disposed between the sections. A U-shaped spacer having a width wider than the width in the circumferential direction is attached .
[0009]
According to a second aspect of the present invention, in the static induction device in which the line end of the high-voltage winding is disposed at an end in the stacking direction and a ground electrode is disposed on the inner diameter side of the high-voltage winding, A section in the range of 10 to 30% of the total stack length from the end of the track is configured by attaching a spacer for insulation reinforcement on the inner diameter side, and the spacer is attached to the key spacer disposed between the sections. It is characterized in that a U-shaped spacer having a width wider than the circumferential width of the key spacer is attached .
[0010]
As a modification of the present invention, in the static induction device in which the line end of the high voltage winding is arranged in the center with respect to the stacking direction and a ground electrode is arranged on the outer diameter side of the high voltage winding, the high voltage winding Insulation paper for outer-diameter-side insulation reinforcement can be attached to a section in the range of 10 to 30% of the total stack length with the line end as the center .
[0011]
As another modification of the present invention, in the static induction device in which the line end of the high-voltage winding is disposed at the end in the stacking direction and a ground electrode is disposed on the outer diameter side of the high-voltage winding, An insulation paper for insulation reinforcement on the outer diameter side may be attached to a section in the range of 10 to 30% of the total stack length from the line end of the high voltage winding .
[0012]
As described above, in the static induction device according to the present invention, a spacer for inner-diameter side insulation reinforcement or a section in a range of 10 to 30% of the total stack length from the line end of the high-voltage winding or the line end as a center. Reduced material usage by reducing insulation dimensions between high-voltage windings and low-voltage windings, and grounding electrodes such as iron cores and tanks by improving insulation performance by installing insulation paper for insulation reinforcement on the outer diameter side The price drop due to the increase in the work time due to the insulation reinforcement attached to the section is equal.
[0013]
This is generally the case for windings for ultra-high voltage of static induction devices such as power transformers and reactors. Improvement of the insulating performance due to adding the spacer and the insulating paper winding is 30% from 10, also 10 to 30% away the entire stack length from the line end, the generation voltage is decreased from approximately 70 to 90% It becomes equal to the improvement rate of insulation performance.
[0014]
In this case, if the range of 10 to 30% of the total stack length is deviated, the balance between the insulation performance and the price is lost, and the insulation performance is lowered or the price is increased.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0016]
[First Embodiment]
FIG. 1 is a cross-sectional configuration diagram showing a first embodiment of a static induction device according to the present invention, and FIGS. 2A and 2B are an enlarged configuration diagram and an enlarged side view showing a U-shaped spacer of FIG.
[0017]
As shown in FIG. 1, the static induction device has a high voltage winding 1, and this high voltage winding 1 has a U-shaped spacer for inner-side insulation reinforcement in a section 2 ranging from 10 to 30% of the entire stack. A plurality of 3 are attached. The line end 4 of the high voltage winding 1 is disposed at the center of the stack, and the low voltage winding 5 as a ground electrode is disposed on the inner diameter side of the high voltage winding 1.
[0018]
Further, the U-shaped spacer 3 is attached to the key spacer 6 disposed between the plurality of sections 2 in a wide manner as shown in FIGS. 2 (A) and 2 (B). This is because the U-shaped spacer 3 further improves the insulation performance. The U-shaped spacer 3 is attached to a key spacer 6, the key spacer 6 is fixed to a rail 7, and an insulating cylinder 8 is disposed inside the rail 7.
[0019]
Next, the operation of this embodiment will be described.
[0020]
In this embodiment, the U-shaped spacer 3 for reinforcing the inner diameter side insulation is attached to the section 2 in the range of 10 to 30% of the total stack length with the line end 4 of the high-voltage winding 1 as the center, so that the insulation performance is improved. Insulation reinforcement by attaching a U-shaped spacer 3 to the section 2 due to a reduction in the material used by reducing the insulation size between the high-voltage winding 1 and the low-voltage winding 5 and the ground electrode such as the iron core or tank. The increase in price due to the increase in work hours due to is equal.
[0021]
This is generally applicable to windings for ultra-high voltage of static induction devices such as power transformers and reactors. Range of improvement of the insulation performance due to the U-shaped spacer 3 in 30% 10 and from 10 of the total stack length about the line end 4 up to 30%, the generated voltage is lowered from approximately 70 to 90% Therefore, it becomes equal to the improvement rate of insulation performance.
[0022]
As described above, according to this embodiment, the U-shaped spacer 3 for reinforcing the inner diameter side insulation is attached to the section 2 in the range of 10 to 30% of the total stack length with the line end 4 of the high-voltage winding 1 as the center. Thus, the insulation performance and the price are most balanced, and both the improvement of the insulation performance and the achievement of the price reduction can be satisfied.
[0023]
[Second Embodiment]
FIG. 3 is a cross-sectional configuration diagram showing a second embodiment of the static induction device according to the present invention. The same parts as those in the first embodiment will be described with the same reference numerals. The same applies to the following embodiments.
[0024]
As shown in FIG. 3, the high-voltage winding 1 has a plurality of U-shaped spacers 3 for inner-diameter side insulation reinforcement attached to a section 2 ranging from the line end 4 to 10 to 30% of the entire stack. The line end 4 of the high voltage winding 1 is disposed at the stack end, and the low voltage winding 5 as a ground electrode is disposed on the inner diameter side of the high voltage winding 1. The U-shaped spacer 3 is configured in the same manner as in the first embodiment.
[0025]
As described above, in the present embodiment, by attaching the U-shaped spacer 3 for insulation reinforcement on the inner diameter side to the section 2 in the range from 10 to 30% of the total stack length from the line end 4 of the high-voltage winding 1, in improvement of the insulating performance due to the U-shaped spacer 3 from 10 to 30%, also a position away 30% 10 of the total stack length from line end 4, the generation voltage is decreased from approximately 70 to 90% It becomes equal to the improvement rate of the insulation performance by the U-shaped spacer 3. Other operations are the same as those in the first embodiment, and the same effects as those in the first embodiment can be obtained.
[0026]
[Third implementation type bear]
FIG. 4 is a cross-sectional configuration diagram showing a third embodiment of the static induction device according to the present invention, and FIGS. 5A and 5B are an enlarged configuration diagram and an enlarged side view showing an insulating paper winding portion of FIG.
[0027]
As shown in FIG. 4, the high-voltage winding 1 has a plurality of insulating paper winding portions 9 for insulation reinforcement on the outer diameter side attached to a section 2 in the range of 10 to 30% of the entire stack with the line end 4 as the center. It has been. The line end 4 of the high voltage winding 1 is disposed at the center of the stack, and the low voltage winding 5 as a ground electrode is disposed on the outer diameter side of the high voltage winding 1.
[0028]
Further, the insulating paper add-on portion 9 is added to one outermost line in the section 2 as shown in FIGS. 5 (A) and 5 (B). The insulating paper winding portion 9 is disposed between the key spacers 6, the key spacers 6 are fixed to the rails 7, and an insulating cylinder 8 is disposed inside the rails 7.
[0029]
As described above, the insulation performance increase rate by the insulation paper addition portion 9 is obtained by attaching the insulation paper addition portion 9 for insulation reinforcement on the outer diameter side to the section 2 in the range of 10 to 30% of the entire stack. ranging from 10 of the total stack length up to 30% is equal to the rate of improvement in the insulation performance because the generated voltage is lowered from approximately 70 to 90% around a 10 to 30%, and the line end 4. Therefore, also in this embodiment, the same effect as the first embodiment can be obtained.
[0030]
[Fourth Embodiment]
FIG. 6 is a cross-sectional configuration diagram showing a fourth embodiment of the stationary induction device according to the present invention.
[0031]
As shown in FIG. 6, the high-voltage winding 1 has a plurality of insulating paper addition portions 9 for insulation reinforcement on the outer diameter side attached to the section 2 in the range from the line end 4 to 10 to 30% of the entire stack. . The line end 4 of the high voltage winding 1 is disposed at the stack end, and the low voltage winding 4 as a ground electrode is disposed on the outer diameter side of the high voltage winding 1. And the insulating paper addition part 9 is comprised similarly to the said 3rd Embodiment.
[0032]
Therefore, in the present embodiment, by attaching a plurality of insulating paper winding portions 9 for insulation reinforcement on the outer diameter side to the section 2 in the range from 10 to 30% of the total stack length from the line end 4 of the high-voltage winding 1. The same operations and effects as those of the third embodiment can be obtained.
[0033]
The present invention can be variously modified without being limited to the above embodiments. For example, in each of the embodiments described above, the low voltage winding 5 is used as the ground electrode. However, the present invention is not limited to this, and an iron core or a tank may be used. Moreover, in the said 1st, 2nd embodiment, although the spacer formed in the U shape was used, the thing of another shape may be sufficient.
[0034]
【The invention's effect】
As described above, according to the first to fourth aspects of the present invention, the inner diameter side insulation is provided from the line end of the high voltage winding or from 10 to 30% of the total stack length centering on the line end. By installing a spacer for reinforcement and insulation paper for insulation reinforcement on the outer diameter side, a static induction device that achieves both the improvement of insulation performance and the achievement of low price, with the best balance between insulation performance and price. Can be provided.
[Brief description of the drawings]
FIG. 1 is a cross-sectional configuration diagram showing a first embodiment of a static induction device according to the present invention.
2A and 2B are an enlarged configuration diagram and an enlarged side view showing a U-shaped spacer of FIG.
FIG. 3 is a cross-sectional configuration diagram showing a second embodiment of the static induction device according to the present invention.
FIG. 4 is a cross-sectional configuration diagram showing a third embodiment of the stationary induction device according to the present invention.
FIGS. 5A and 5B are an enlarged configuration diagram and an enlarged side view showing an insulating paper addition portion of FIG. 4;
FIG. 6 is a cross-sectional configuration diagram showing a fourth embodiment of a static induction device according to the present invention.
[Explanation of symbols]
1 High Voltage Winding 2 Section 3 U-shaped Spacer 4 Line End 5 Low Voltage Winding (Grounding Electrode)
6 Key spacer 7 Rail 8 Insulating tube 9 Insulated paper winding part

Claims (2)

In the static induction device in which the line end of the high-voltage winding is arranged in the center with respect to the stacking direction and the ground electrode is arranged on the inner diameter side of the high-voltage winding, the entire stack centering on the line end of the high-voltage winding A section in the range of 10 to 30% of the length is provided with a spacer for insulation reinforcement on the inner diameter side, and the spacer is attached to a key spacer disposed between the sections. A stationary induction device comprising a U-shaped spacer that is wider than a width in a direction . In the static induction device in which the line end of the high-voltage winding is disposed at the end in the stacking direction and the ground electrode is disposed on the inner diameter side of the high-voltage winding, the total stack length of 10 from the line end of the high-voltage winding. To 30% of the section, and a spacer for inner-diameter side insulation reinforcement is attached , and the spacer has a width in the circumferential direction of the key spacer disposed between the sections. A stationary induction device characterized in that a U-shaped spacer having a wider width is attached .

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