SU1381612A2 - Winding of induction device - Google Patents

Abstract

The invention relates to induction devices of high power and high voltage. The aim of the invention is to reduce the height of the winding by reducing lightning overvoltages on the channels between the coils that are open from the outer and inner surfaces. The coil is formed by coils 1-15 wound with wire parallels 16 and 17. A pair of coils form channels 18, open from the outer surface, the other pair of coils form a channel 19, open from the inner surface. Here, on the outermost turns, electrodes 20 are mounted, connected in pairs by connections 21. 2 sludge. S (l

Description

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The invention relates to high-power and high-voltage (HV) induction devices (transformers, reactors) included in HV transmissions and relates to HV windings.

The purpose of the invention is to reduce the winding height by reducing thunderstorm overvoltages on the open and external surfaces of the channels between the coils.

Figure 1 shows the structure of the proposed winding; Fig. 2 is a diagram explaining the new physical effect achieved.

The winding (Fig. 1) is formed by coils 1-15 (the numbers of the coils indicate the sequence of the connection of the coils and the value of the voltage on them relative to the neutral terminal X of the winding), wound by two wires 16 and 17.

A pair of coils of the first - second, fifth and sixth pole form channels 18, open from the outer surface, a pair of third - fourth coils form a channel 19 open from the inner surface.

In the winding (Fig. 1), electrodes 20 are installed in extreme coils forming the open channels of the coil pairs, and are connected in pairs by connections 21: electrodes are wound on coils 1 and 5, 11 and 15 of the coils forming open channels 18 20 of insulated copper tape, the electrodes are connected in pairs by joints 21 of insulated copper tape; On turns 6 and 10 of a pair of coils forming an open channel 19, electrodes 20 are wound from an insulated copper tape (22 is a neutral terminal).

The physical effect due to the new set of features is explained in Fig. 2, where the arrows have pulsed currents 23, which occur in the process of thunderstorm overvoltages between opposite turns 1-15 through closed channels between the coils (closed spacing channels with internal and external side surfaces closed by inter-cage transitions).

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From the picture of currents 23 it can be seen that they flow only from the turns of parallel 16 to the turns of parallel 17, which puts the parallel in unequal conditions and creates thunderstorm overvoltages on the open inter-ball channels.

The first part of the drawing shows a similar pattern of impulse currents in open mezzanine channels. Geometrically, this pattern of currents is symmetrical, since currents 24 flow from parallel 16 to parallel 17, and currents 25 from parallel 17 to parallel 16. To correct the asymmetry of currents 23 in the winding of this additional invention, currents 25 are increased so as to compensate for currents 25 the sum of currents 23 and 24 and created for parallel 17 the same conditions as for parallel 16.

Structurally, this is achieved by increasing the electrical capacitance between the turns creating currents 25.

The technical and economic effect is that the winding according to the supplementary invention has small coil channels (4-5 mm) and can be used in induction devices with a voltage of 110-330 kV of greater power.

In the winding, the interlocking of the turns and the inter-coil capacitive rings are excluded, which, by 1.5-2% in addition to the basic invention, reduces the consumption of materials of the electrical induction device.

Claims (1)

Invention Formula Induction device winding autom. St. No. 1026176, characterized in that, in order to reduce the winding height by reducing thunderstorm overvoltages on the open from the outer and inner surfaces of the channels between the coils or layers in the input winding zone, on the outer turns, forming open channels of pairs of coils or layers with sides of the outer and inner surfaces, electrodes are installed, pairwise interconnected. sixteen G7 | 23 J5 L 73 / 2 / 2 / 7 7 / YU 7J eight sixteen 17 five JL 13 - - 13 12 12 71 77 /but 7a 2