SU949724A1 - Induction apparatus - Google Patents

Description

one

The invention relates to electrical engineering, in particular to high-voltage reactors for operation as storage, impact and other reactors with a short-term mode of operation.

A feature of reactors of this designation is that in a small volume it is necessary to concentrate a lot of energy and the time-varying magnetic field strength reaches on the surface of the tank or electromagnetic screens such that the temperature of these structural elements may exceed the allowable values, which leads to decomposition of an insulating medium, such as transformer oil, SF6 gas, etc.

A device comprising a tank, an active part immersed in oil, is known, the walls of the tank being insulated with sound-absorbing pads made in the form of an accordion. An air space 13 remains between the wall of the tank and the sound-absorbing pad.

However, such a device does not solve the problem of reducing heat transfer from the tank wall to the insulating medium.

A device is known in which the tank is made of non-metallic f2J,

The disadvantage of such devices is that the tank wall is not used as an element in which the losses must be allocated; the more losses are allocated, the greater the equivalent resistance will be, and it is necessary to reduce the time

10 transitional reactor operation.

Known induction apparatus containing a tank, a winding immersed in an insulating medium, electromagnetic screens, forming the inner surface of the tank C.

The disadvantage of the solid solution is that at large values of the field strength the temperature of the screens themselves may exceed the allowable

20 values The temperature can be reduced by removing the screens from the winding, but does not lead to an increase in the dimensions, mass and, correspondingly, mg of the thermal capacity of the reactor.

25

In addition, in a number of cases, in order to limit oscillations under transient conditions, it is required to increase the active component of the input resistance of the reactor. The required value of the active resistance due to the increase in losses in the shields can be achieved by connecting the built-in resistor in series with the reactor winding, which complicates the design. The purpose of the invention is to reduce i abarits and the mass of the apparatus, improve its performance and simplify the design. This goal is achieved by the fact that the induction apparatus containing a tank, a winding immersed in an insulating medium, electromagnetic screens located on the inner surface of the tank is equipped with a dielectric partition and a heat insulating layer, and the insulating medium is separated from the tank by a dielectric partition mounted on the tank above the screen and the heat insulating layer is located between the dielectric partition and the screen. The drawing shows the proposed my device, a general view. The induction anniapaT contains a tank 1, a winding 2 immersed in an insulating medium 3, electromagnetic screens 4 forming the inner surface of the tank, cooler 5, a thermal insulating layer b and a dielectric partition .7. A dielectric barrier 7 mounted on the tank 1 separates the insulating medium (for example, transformer oil) from the inner surface of the tank. The heat insulating layer 6 fills the space between the partition 7 and the screen 4. When the induction apparatus is working in the tank wall, 1 there is a loss and the greater the loss, the greater the equivalent resistance. Increasing the equivalent resistance is necessary to reduce the transition time of the reactor. In this case, the wall of the tank 1, as well as the electromagnetic screens 4, in which loss is also released, heats up. Dielectric partition. cable 7 (for example, from bakelite, fiberglass, porcelain) and 1 straying b prevents excessive heat transfer from the walls of the tank 1 and electromagnetic screens 4 to the insulating medium 3. The thickness of the layer b is chosen so as to provide the necessary temperature difference between the screen 4 and the internal the surface of the non-conductive partition 7, taking into account the properties of the insulating medium 3. Screens 4 may not be installed if the desired temperature and loss is achieved without them. The losses released in the shields 4 are transmitted through the wall of the tank 1 directly to the surrounding air, and the losses released in the winding 2 through the cooler 5. The proposed device allows you to increase the maximum allowable temperature of the shields (or tank if there are no shields), while maintaining the temperature of the surface in contact with the refrigerant 3 is at an acceptable level and, consequently, reduce the consumption of high-alloyed expensive steel going to the screens and improve the operating characteristics of the reactors (or simplify the design of actors by eliminating from the circuit embedded resistor winding). Formulation of the invention An induction apparatus comprising a tank, a winding immersed in an insulating medium, electromagnetic screens located on the inner surface of the tank, characterized in that, in order to reduce the volume of the RITOV. and the mass of the apparatus, improving its performance and simplifying the design, the apparatus is provided with a dielectric partition and a heat insulating layer, the insulating medium being separated from the tank by a dielectric partition mounted on the tank over the electromagnetic shield, the heat insulating layer is located between the dielectric partition and the screen. Sources of information taken into account in the examination 1.Patent of Germany 1111726, cl. 21 d, 50, 1962. 2. US patent 3644856, cl. 366-92, 1972. 3. Mastryukov LA Electromagnetic shielding of powerless steelless reactors, Journal of Electricity, No. 1, 1968, p. 39-46.

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Claims (1)

Claim An induction apparatus comprising a tank, a winding immersed in an insulating medium, electromagnetic screens located on the inner surface of the tank, characterized in that, in order to reduce the size. and the mass of the apparatus, improving its operational characteristics and simplifying the design, the apparatus is equipped with a dielectric partition and a heat insulating layer, the insulating medium being separated from the tank by a dielectric partition mounted on the tank on top of the electromagnetic screen, the heat insulating layer is located between the dialectrical partition and the screen.