JPH0443617A - Composite insulation reactor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a composite insulation reactor.

[Conventional technology]

Conventional composite insulating reactors are cooled and cooled using diffusers and spargeers, as described in Japanese Patent Application Laid-Open No. 61-27888.
Refrigerant liquid, which is an insulating medium, is uniformly spread over the core and windings to prevent local temperature rises in the core and windings. However, since the iron core is not only a concentric cylinder but also has a biaxial structure, it is difficult to uniformly distribute the refrigerant liquid to the iron core legs and yoke parts using a diffuser or a sprayer.

In addition, in JP-A-63-182807, in order to improve the drawback that the refrigerant liquid, which is a cooling and insulating medium, cannot be uniformly distributed over the iron core and windings, the inside of the tank is filled with a refrigerant liquid, which is a cooling and insulating medium. The structure is divided into a gas section, an SF section, and a gas section. In other words, the windings and core can be stored in the refrigerant liquid and immersed in the cooling/insulating medium, so the cooling/insulating medium mainly acts as an insulating medium within one winding to cool the windings and core, and SF, gas acts as an insulating medium with the main purpose of maintaining insulation in high voltage parts.

[Problem to be solved by the invention]

The conventional technology described in JP-A No. 61-27888 that sprays refrigerant liquid with a diffuser or spreader is that the diffuser or spreader sprays refrigerant liquid evenly onto the core legs and yoke parts. Since it is difficult to spread the iron, it has the disadvantage of causing a local temperature rise in the iron core. Further, the winding also leaks in the outer circumferential direction, and there is a drawback that the temperature imbalance in the entire vertical direction cannot be eliminated. Due to the local temperature rise caused by these defects, a chemical reaction occurs between SF, gas, and silicon (Sj) contained in the iron core due to a trace amount of moisture, and harmful gas is generated.

This harmful gas begins to corrode the iron core (the detailed mechanism is described in JP-A-63-182807). The structure that separates the refrigerant liquid part of the cooling/insulating medium, SF, and gas part can handle a large amount of refrigerant liquid compared to the structure of dispersing the refrigerant liquid of the cooling/insulating medium as in JP-A No. 61-27888. I need. Further, the insulating partition plate (insulating container) used for partitioning from the SFG gas also becomes large. That is, in order to immerse the iron core and the entire winding, which are contained in a tank, in a cooling/insulating medium, a large amount of refrigerant liquid and a large insulating partition plate are required.

The present invention was made in view of the above points, and it prevents the generation of harmful gases caused by the chemical reaction between silicon of the iron core, SF, and gas, and reduces the amount of refrigerant liquid used as a cooling/insulating medium and the amount of insulating partition plates used. The object of the present invention is to provide a composite insulating reactor that makes it possible to significantly reduce the amount of energy used.

[Means to solve the problem]

The above purpose is to store and immerse the windings and the main landing gear core in the refrigerant liquid part of the cooling/insulating medium inside the insulating partition plate, and to make the yoke have a cross-sectional area larger than that of the main landing gear core. This is achieved by placing it in SFG gas outside the plate.

[Effect]

Even if the windings and the main landing gear core are placed in the refrigerant liquid as a cooling/insulating medium, and the yoke is placed in SF or gas, local temperature rises can now be prevented, and the windings and the entire core can be Cooling and insulation performance can be maintained even without immersing in refrigerant liquid.

〔Example〕

The present invention will be explained below based on the illustrated embodiments. FIG. 1 shows an embodiment of the invention. As shown in the figure, the composite insulating reactor consists of a tank 1, a core housed in the tank 1, a yoke 2 made of laminated silicon steel plates, a main landing gear core 3, and a main landing gear core 3. A winding 4 wound around an iron core 3 is provided. The inside of the tank 1 is divided into 6 portions of refrigerant liquid as a cooling/insulating medium and 7 portions of SF and gas as cooling/insulating media, and the refrigerant liquid 6, SFt, and gas 7 as cooling/insulating media are used. . In this embodiment of the composite insulating reactor configured as described above, the winding 4 and the main landing gear core 3 are housed and immersed in the refrigerant liquid 6 portion of the cooling/insulating medium in the insulating partition plate 5, and the yoke 2 is Its cross-sectional area was larger than that of the main landing gear core 3, and it was placed in the SFG gas 7 outside the insulating partition plate 5. By doing this, even if the winding 4 and the main landing gear core 3 are placed in the refrigerant liquid 6 as a cooling/insulating medium, and the yoke 2 is placed in the SF & gas 7, local temperature increases can be prevented. Winding 4 as before
, cooling and insulation performance can now be maintained even without immersing the entire core in the refrigerant liquid 6.

Composite insulation prevents the generation of harmful gases caused by chemical reactions between the silicon core, SF, and gas 7, and significantly reduces the amount of refrigerant liquid 6 used as a cooling/insulating medium and the insulating partition plate 5. You can get a reactor.

That is, although FIG. 1 shows a single-phase unit, the same applies to a three-phase unit housed in a tank. Cooling inside tank 1
It is divided into 6 parts of refrigerant liquid as an insulating medium and 7 parts of SFG gas, and the winding 4 and the main landing gear core 3 surrounded by the winding 4 are immersed in the refrigerant liquid 6. SF metal fittings part,
By using gas 7, it is possible to obtain a composite insulating reactor that can improve cooling and insulation effects.

The main leg iron core 3 and the winding 4, which are heating elements, are housed together in an insulating partition plate 5 that separates them from the SF and gas 7. A liquid sending pump 8 and a cooler 9 are connected to the tank 1, which fills the tank with a refrigerant liquid 6 as a cooling/insulating medium, and which cools and circulates the refrigerant liquid 6. This refrigerant liquid 6 fills the inside of the insulating partition plate 5 to at least the bottom surface of the yoke 2. The ring direction may be from the lower side to the upper side like the flow 6a of the refrigerant liquid 6, or it may be in the opposite direction. By doing so, the main landing gear core 3 is sufficiently immersed in the refrigerant liquid 6 by the insulating partition plate 5, thereby preventing local overheating. Yoke 7 has a larger cross section to lower the magnetic flux velocity density and lower the generated loss, which prevents local overheating and therefore reduces the increase in loss over a long period of time in the silicon steel plate parts (main landing gear core 3, yoke 2). can be prevented, and a significant improvement in long-term reliability can be expected.

In this way, according to this embodiment, the cooling effect of the iron core using silicon steel plates is equal to or better than that of the conventional method, while the amount of expensive cooling and insulating media such as refrigerant liquid and insulating partition plates is significantly reduced. A composite insulating reactor can be obtained.

Another embodiment of the invention is shown in FIG.

In this embodiment, the insulating partition plate 5 is interposed between the core block 3a with a gap and the upper and lower yokes 2 constituting the main landing gear core. By doing so, the insulating partition plate 5 is sandwiched between the upper and lower yoke 2 and the core block with a gap 3a, making the installation of the insulating partition plate 5 easier than in the case described above. be able to.

That is, the insulating partition plate 5 fills the refrigerant liquid 6.

Taking advantage of the structure of the geared core reactor, it is inserted between the yoke 2 and the block-shaped gapped core block 3a that constitutes the main leg core 3.

FIG. 3 shows yet another embodiment of the invention. In this embodiment, a refrigerant liquid 6 as a cooling/insulating medium is applied to a center hole 10 of a radial core constructed by radially arranging silicon steel plates and an iron core block 3a with a gap, and an upper yoke (lower yoke) facing the center hole 10. It was made to flow in and out through the hole 1]- provided in the iron) 2. By doing this, the refrigerant liquid 6
The refrigerant liquid 6 flows through the gapped iron core block 3a and the winding 4, making the flow of the refrigerant liquid 6 easier than in the case described above.

In other words, if a radial core (a core in which silicon steel plates are arranged radially) is used in the core block 3a with a gap, use the center hole], 0 in the center of the core block 3a as shown in the figure. A hole 1 is also provided in the yoke 2 to serve as an inlet and an outlet through which the refrigerant liquid 6 is circulated.

FIG. 4 shows still another embodiment of the present invention. In this embodiment, a core block 3a with a gap and an insulating partition plate 5 are connected via an adhesive resin 12 to which the core block 3a is attached. It is integrated.

By doing so, the insulating partition plate 5 can be installed easily.

In other words, when the iron core block 3a is bonded with adhesive resin 12, as shown in the same figure, the adhesive resin 12 is used, and the material of the adhesive resin 】-2 is made of the same material as the material of the insulating partition plate 5. Together, they become one. Even when the iron core block 3a is molded with mold resin,
It can be implemented similarly.

It goes without saying that if the materials of the insulating partition plate 5, adhesive resin 12, and mold resin cannot be matched, the same effect can be obtained by fixing them together with tightening bolts through a sealing material. Mona L's [Effects of the Invention] As mentioned above, the present invention prevents the generation of harmful gases caused by the chemical reaction between silicon of the iron core, SF, and gas, and improves cooling and
The amount of refrigerant liquid used as an insulating medium and the amount of insulating partition plates used has been significantly reduced, preventing the generation of harmful gases caused by chemical reactions between silicon in the iron core, SF, and gas, and reducing the amount of refrigerant used as a cooling and insulating medium. It is possible to obtain a composite insulating reactor that makes it possible to significantly reduce the amount of liquid and insulating partition plates used.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional side view of one embodiment of the composite insulating reactor of the present invention, and FIGS. 2 to 4 are longitudinal sectional side views of main parts of the reactor showing different embodiments of the composite insulating reactor of the present invention. Plate, 6... Refrigerant liquid, 7... SF, gas, 10...
Center hole, 11...hole, 12...adhesive resin

Claims (4)

[Claims] 1. It includes a tank, an iron core housed in the tank, a yoke and a main landing gear core made of laminated silicon steel plates, and a winding wound around the main landing gear core, and an insulating partition plate inside the tank. SF_6 with the refrigerant liquid part of the cooling/insulating medium through
In a composite insulating reactor that is separated into a gas part and uses a refrigerant liquid as a cooling/insulating medium and SF_6 gas, the windings and main landing gear cores are housed and immersed in the refrigerant liquid part within the insulating partition plate. , wherein the yoke has a cross-sectional area larger than the cross-sectional area of the main landing gear core and is disposed in the SF_6 gas outside the insulating partition plate. 2. The composite insulating reactor according to claim 1, wherein the insulating partition plate is interposed between a core block with a gap constituting the main landing gear core and the upper and lower yokes. 3. The refrigerant liquid as the cooling and insulating medium flows in and out through the center hole of the radial core formed by radially arranging silicon steel plates in the voided iron core block, and the hole provided in the upper and lower yoke opposite to this center hole. The composite insulating reactor according to claim 1 or 2, wherein the reactor is 4. The composite insulating reactor according to claim 3, wherein the core block with a gap and the insulating partition plate are integrated or combined via an adhesive resin to which the core block is attached.