JPH11233352A - Stationary guidance equipment - Google Patents

Abstract

(57) [Problem] To provide a static induction device having a configuration in which both improvement in insulation performance and reduction in cost are most balanced. A static induction device in which a line end (4) of a high-voltage winding (1) is arranged at the center with respect to the stacking direction and a low-voltage winding (5) as a ground electrode is arranged on the inner diameter side of the high-voltage winding (1). A spacer 3 for insulation reinforcement on the inner diameter side was attached to the section 2 ranging from 10 to 30% of the total stack length around the line end 4 of the high-voltage winding 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a static induction device such as a power transformer and a reactor, and more particularly to a static induction device having an optimum balance between insulation performance and cost.

[0002]

2. Description of the Related Art Conventionally, static induction devices such as power transformers and reactors have a major problem in that it is difficult to satisfy the three requirements of improved insulation performance, miniaturization, and cost reduction. . Generally, in order to improve the insulation performance, it is necessary to increase the insulation dimension up to the ground electrode surface such as the low voltage winding or the iron core facing the high voltage winding, or to insert a U-shaped spacer in a part of the high voltage winding or to insulate the insulation. There is a means for adding paper.

[0003]

However, the means for enlarging the insulation dimensions as described above improves the insulation performance, but on the other hand, increases the size of stationary induction equipment and increases the materials used, leading to an increase in price. There's a problem. In addition, even if a U-shaped spacer or insulating paper is wound around a part of the winding, the insulation performance is improved, but the work of attaching the U-shaped spacer or insulating paper to the winding requires much time. There is a problem that leads to a rise.

[0004] Therefore, conventionally, in a method of adding a U-shaped spacer or insulating paper to a part of the winding, it is usual to attach the high-voltage winding to several sections from the line end of the high-voltage winding in order to suppress a rise in cost. .

As described above, conventional static induction devices such as power transformers and reactors have a problem that it is extremely difficult to satisfy both improvement of insulation performance and reduction of cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a stationary induction device having a configuration in which both improvement in insulation performance and cost reduction are most balanced.

[0007]

In order to achieve the above object, the present inventor attaches spacers or insulating paper to sections of various ranges from or around the line end of the high-voltage winding to improve insulation performance. As a result of comparing and examining the range where the balance with price is optimal, 10 to 30% of the total stack length
It was found that the balance between the insulation performance and the price was optimized when it was set in the range up to.

That is, the invention according to claim 1 is a static induction device in which the line end of the high-voltage winding is disposed at the center with respect to the stacking direction, and the ground electrode is disposed on the inner diameter side of the high-voltage winding. A spacer for inner diameter side insulation reinforcement is attached to a section ranging from 10 to 30% of the entire stack length around the line end of the high-voltage winding.

According to a second aspect of the present invention, there is provided a stationary induction device in which a line end of a high-voltage winding is disposed at an end in a stacking direction and a ground electrode is disposed on an inner diameter side of the high-voltage winding.
10 to 30 of the total stack length from the line end of the high voltage winding
%, A spacer for insulating reinforcement on the inner diameter side is attached to the section up to%.

According to a third aspect of the present invention, there is provided a stationary induction device in which a line end of a high-voltage winding is disposed at a center with respect to a stacking direction and a ground electrode is disposed on an outer diameter side of the high-voltage winding. An insulating paper for insulating reinforcement on the outer diameter side is attached to a section ranging from 10 to 30% of the entire stack length around the line end of the high-voltage winding.

According to a fourth aspect of the present invention, there is provided a stationary induction machine in which a line end of a high-voltage winding is disposed at an end in a stacking direction and a ground electrode is disposed on an outer diameter side of the high-voltage winding.
10 to 30 of the total stack length from the line end of the high voltage winding
%, The insulation paper for the outer diameter side insulation reinforcement is attached to the section of the range up to%.

As described above, in the stationary induction apparatus according to the present invention, the insulation reinforcement for the inner diameter side is provided from the line end of the high voltage winding or to the section ranging from 10 to 30% of the total stack length around the line end. The use of high-voltage windings and low-voltage windings, as well as the reduction of insulation dimensions between ground electrodes such as iron cores or tanks, by improving insulation performance by attaching spacers and insulating paper for insulation reinforcement on the outer diameter side The price decrease due to the reduction in the material is equal to the price increase due to the increase in working time due to the insulation reinforcement attached to the section.

[0013] This is generally the case for windings of very high voltage or higher for stationary induction equipment such as power transformers and reactors. The improvement rate of the insulation performance by adding the spacer and the insulating paper is 10 to 30%, and the generated voltage is reduced by about 70 to 90% at the position 10 to 30% of the total stack length from the line end. It becomes equal to the improvement rate of the insulation performance.

In this case, 10 to 30% of the total stack length
If the range is deviated, the balance between the insulation performance and the price will be lost, and the insulation performance will be reduced or the price will be increased.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

[First Embodiment] FIG. 1 is a sectional view showing a first embodiment of a stationary guidance apparatus according to the present invention, and FIG.
(A), (B) is an enlarged block diagram and an enlarged side view showing the U-shaped spacer of FIG.

As shown in FIG. 1, the stationary induction machine has a high-voltage winding 1 which is provided in sections 2 ranging from 10 to 30% of the total stack for radial insulation reinforcement. A plurality of U-shaped spacers 3 are attached. Also,
The line end 4 of the high-voltage winding 1 is arranged in the center of the stack, and the low-voltage winding 5 as a ground electrode is arranged on the inner diameter side of the high-voltage winding 1.

Further, the U-shaped spacer 3 is formed as shown in FIG.
As shown in (A) and (B), it is widely attached to a key spacer 6 arranged between a plurality of sections 2. This is because the insulation performance is further improved by the U-shaped spacer 3. The U-shaped spacer 3 is adhered to a key spacer 6, the key spacer 6 is fixed to a rail 7, and an insulating cylinder 8 is provided inside the rail 7.

Next, the operation of the present embodiment will be described.

In the present embodiment, the U-shaped spacer 3 for reinforcing the inner side insulation is provided on the section 2 ranging from 10 to 30% of the total stack length around the line end 4 of the high-voltage winding 1.
Attaching the low-voltage winding 1 and low-voltage winding 5 by improving the insulation performance and reducing the insulation dimensions between the ground electrode such as an iron core or a tank. The price increase due to the increase in working time due to the insulation reinforcement for mounting the U-shaped spacer 3 is equalized.

[0021] This is generally the case for windings of ultra-high voltage or higher for stationary induction equipment such as power transformers and reactors. The improvement rate of insulation performance by the U-shaped spacer 3 is 10 to 30%, and in the range of 10 to 30% of the total stack length around the line end 4, the generated voltage is reduced by about 70 to 90%. Therefore, it becomes equal to the improvement rate of the insulation performance.

As described above, according to this embodiment, the total stack length of 10 to 30 around the line end 4 of the high voltage winding 1
%, The insulation performance and the price are most balanced by mounting the U-shaped spacer 3 for the insulation on the inner diameter side in the section 2 in the range of up to%, thereby satisfying both the improvement of the insulation performance and the achievement of the price reduction. be able to.

[Second Embodiment] FIG. 3 is a cross-sectional view showing a stationary guidance device according to a second embodiment of 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.

As shown in FIG. 3, the high-voltage winding 1 is provided with a plurality of U-shaped spacers 3 for reinforcing the insulation on the inner diameter side in the section 2 ranging from the line end 4 to 10 to 30% of the entire stack. I have. The line end 4 of the high-voltage winding 1 is
Low-voltage winding 5 arranged at the end of the stack and serving as a ground electrode
Are 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.

As described above, in the present embodiment, the high-voltage winding 1
The U-shaped spacer 3 for reinforcing the insulation on the inner diameter side is attached to the section 2 in the range from 10 to 30% of the total stack length from the line end 4 to the insulation performance by the U-shaped spacer 3. At a position 30% away from the line end 4 and 10 to 30% of the total stack length from the line end 4, since the generated voltage is reduced by about 70 to 90%, the improvement rate of the insulation performance by the U-shaped spacer 3 becomes equal. . Other operations are the same as those of the first embodiment, and the same effects as those of the first embodiment can be obtained.

[Third Embodiment Bear] FIG. 4 is a sectional configuration view showing a third embodiment of a stationary guidance apparatus according to the present invention, and FIG.
4A and 4B are an enlarged configuration diagram and an enlarged side view showing an insulating paper roll-up portion of FIG.

As shown in FIG. 4, the high-voltage winding 1 is provided on the section 2 ranging from 10 to 30% of the entire stack with the line end 4 as a center. Are installed. The line end 4 of the high-voltage winding 1 is arranged at the center of the stack, and the low-voltage winding 5 as a ground electrode is arranged on the outer diameter side of the high-voltage winding 1.

Further, the insulating paper winding portion 9 is provided as shown in FIG.
As shown in (A) and (B), it is wound around one outermost line in section 2. The insulating paper winding portion 9 is disposed between the key spacers 6, and the key spacer 6 is fixed to the rail 7, and further, an insulating cylinder 8 is disposed inside the rail 7.

As described above, 10 to 30 of the entire stack
%, The insulating paper wrapping part 9 for insulation reinforcement on the outer diameter side is attached to the section 2 in the range up to 10%, so that the insulating paper wrapping part 9 improves the insulation performance by 10 to 30%.
In the range from 10 to 30% of the total stack length with the line end 4 as the center, the generated voltage is reduced by approximately 70 to 90%, so that the improvement rate of the insulation performance is equal. Therefore, also in the present embodiment, the same effects as in the first embodiment can be obtained.

[Fourth Embodiment] FIG. 6 is a sectional view showing a stationary guidance apparatus according to a fourth embodiment of the present invention.

As shown in FIG. 6, the high-voltage winding 1 is provided with a plurality of insulating paper winding portions 9 for insulating reinforcement on the outer diameter side, in sections 2 ranging from 10% to 30% of the entire stack from the line end 4. Have been. Also, the line end 4 of the high-voltage winding 1
Are disposed at the end of the stack, and the low-voltage winding 4 as a ground electrode is disposed on the outer diameter side of the high-voltage winding 1. The insulating paper roll-up unit 9 is configured in the same manner as in the third embodiment.

Therefore, in this embodiment, the high voltage winding 1
A plurality of insulating paper winding portions 9 for outer-diameter-side insulation reinforcement are attached to the section 2 ranging from 10 to 30% of the total stack length from the line end 4 to the same operation and effect as in the third embodiment. The effect is obtained.

The present invention is not limited to the above embodiments, and various changes can be made. 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. Further, in the first and second embodiments, the U-shaped spacer is used, but other shapes may be used.

[0034]

As described above, according to the first to fourth aspects of the present invention, the section ranging from 10 to 30% of the entire stack length from the line end of the high voltage winding or from the line end as a center. In addition, by attaching spacers for insulation reinforcement on the inner diameter side and insulation paper for insulation reinforcement on the outer diameter side, insulation performance and price are most balanced, satisfying both improvement of insulation performance and achievement of low price. The static induction device can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional configuration diagram showing a first embodiment of a stationary guidance device according to the present invention.

2A and 2B are an enlarged configuration diagram and an enlarged side view showing the U-shaped spacer of FIG. 1;

FIG. 3 is a sectional configuration diagram showing a second embodiment of the stationary guidance device according to the present invention.

FIG. 4 is a sectional configuration diagram showing a third embodiment of the stationary guidance device according to the present invention.

FIGS. 5A and 5B are an enlarged configuration diagram and an enlarged side view showing an insulating paper roll-up portion of FIG. 4;

FIG. 6 is a sectional configuration diagram showing a fourth embodiment of the stationary guidance device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 High-voltage winding 2 Section 3 U-shaped spacer 4 Line end 5 Low-voltage winding (ground electrode) 6 Key spacer 7 Rail 8 Insulation cylinder 9 Insulation paper winding part

Claims (4)

[Claims] 1. A static induction machine in which a line end of a high-voltage winding is disposed at a center with respect to a stacking direction and a ground electrode is disposed on an inner diameter side of the high-voltage winding. A stationary induction device characterized in that a spacer for inner diameter side insulation reinforcement is attached to a section ranging from 10 to 30% of the total stack length around the center. 2. A static induction machine in which a line end of a high-voltage winding is disposed at an end in a stacking direction and a ground electrode is disposed on an inner diameter side of the high-voltage winding. A stationary induction machine characterized in that spacers for inner diameter side insulation reinforcement are attached to sections ranging from 10 to 30% of the total stack length. 3. A static induction device in which a line end of a high-voltage winding is disposed at a center with respect to a stacking direction and a ground electrode is disposed on an outer diameter side of the high-voltage winding. A stationary induction machine characterized in that an insulating paper for insulating reinforcement on the outer diameter side is attached to a section ranging from 10 to 30% of a total stack length around an end. 4. A static induction machine in which a line end of a high-voltage winding is disposed at an end in a stacking direction and a ground electrode is disposed on an outer diameter side of the high-voltage winding. A stationary induction machine characterized in that insulating paper for outer-diameter-side insulation reinforcement is attached to sections ranging from 10 to 30% of the total stack length.