JPS5838592Y2 - capacitor soch - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a capacitor device that can be used in a high voltage circuit in which a large number of case-type capacitors are assembled and housed in one tank.

In general, a capacitor device that combines a discharge coil and a series reactor is used to protect the capacitor.

An overview of this is shown in Figure 1.

1 is a capacitor, 2 is a series reactor, and 3 is a discharge coil.

These devices are installed separately as shown in FIG.

Note that 7 and 8 are respective connection lines. When this capacitor device is used in a 66KV circuit, for example, these devices are mounted on an insulating frame and used in a high voltage circuit.

For this reason, as the capacity of the capacitor device increases, the installation area of the equipment becomes vast, and the installation work is also complicated.

However, due to the shrinking of capacitor devices, a capacitor device for high voltage circuits in which case-type capacitors are assembled in one tank has recently been considered, and a large scale reduction has been achieved.

In order to further reduce this, methods of mounting a series reactor and discharge coil on the capacitor are being considered.

In addition, a put-front design that eliminates the exposure of live parts is also being considered in order to eliminate the effects of air pollution.

This proposal was made to solve these problems,
The present invention relates to a capacitor device in which the object can be achieved by improving the mounting structure of the discharge coil and the way the connecting wire of the capacitor is drawn out.

An embodiment of the present invention is shown in FIG. 1 is a case-shaped internal capacitor formed by sealing a capacitor element together with a dielectric liquid in a case. 2 is a reactor, and 3 is a discharge coil.

A large number of internal capacitors 1 are collected and attached to a collection frame 4.

An appropriate number of internal capacitors 1 are connected in series, parallel, or series-parallel depending on the rating of the capacitor device.

One of the terminals is connected to the through bushing 13 by the connecting conductor 7.
, are connected to the series reactor 2 via a connecting line 9.

The other terminal is connected to the connecting conductor 8 through the bushing 1.
It is guided by 4.

The collecting frame 4 is fixed within the capacitor device storage tank 16 by a plurality of insulating supports 5.

The connecting conductors 8 and 9 are fixed to the collecting frame 4 by an insulating support insulator 6.

The outlet bushing 14 is attached to a bushing pocket 17 provided on the side wall of the storage tank 16, and a hand hole 20 for connecting the bushing is provided in the pocket 17.

This outlet bushing 14 is connected to a cable 2 from the outside.
4 is inserted and connected, and the cable can be attached and detached from the outside.

On the other hand, the discharge coil 3 is housed above the bushing in the bushing pocket 17 and placed close to the bushing 14.

If necessary, a high voltage shield plate 22 is provided between the bushing 14 and the opposing surface of the discharge coil 30.

The discharge coil 3 has one lead wire 11 connected to a connecting conductor 7a which is an extension of the end of the connecting conductor 7, and the other lead wire 1
2 to the middle 8a of the connection conductor 8 of the bushing.
Complete the wiring shown in the diagram.

27 is a secondary terminal box for the discharge coil provided in the bushing pocket 17 portion.

Reference numeral 21 denotes a cover for the storage tank 16, which in this embodiment has a simple structure in which a part of the storage tank cover is extended in order to conveniently store the discharge coil 3.

19 is a storage tank for the series reactor 2, and 10 is the other lead wire of the series reactor 2, which is led out by an external cable 25 through a lead wire 15.

18 is a bushing pocket provided in the storage tank 19 of the series reactor 2.

An airtight container consisting of a capacitor device storage tank 16, a series reactor storage tank 19, respective bushing pockets 17, 18, and a cover 21 is filled with insulating oil to provide insulation between the internal capacitor and the storage tank.

The 28 beams are bases on which the accelerator storage tank 19 and the capacitor device storage tank 16 are placed, respectively.

FIG. 4 is an internal configuration diagram of an embodiment of the present invention relating to a three-phase capacitor device, viewed from above.

In this embodiment, reference numeral 23 is a partition wall provided within the storage tank 16 for insulating phase separation of the capacitor device.

In this embodiment, the same parts as in FIG. 3 are denoted by the same reference numerals, and their explanations will be omitted.

Incidentally, FIG. 5 is a circuit connection diagram of FIG. 4.

In this invention, the series reactor 2 is provided on one side of the capacitor storage tank 16 via the through bushing 13, and the discharge coil 3 and the capacitor device are connected on the other side without providing any space between the discharge coil 3 and the internal capacitor. The outlet bushing 14 is housed in the same pocket 17, and the attachment position of the outlet bushing 14 is on one side of the pocket, and the space created thereby is used to house the discharge coil 3. It is.

Adopting this structure provides the following features.

That is, since the discharge coil 3 is completely filled with insulating oil and there is no partition wall between it and the capacitor 1, it is possible to arrange it close to the internal capacitor 1 or its assembly frame 4 and lead bushing 14, resulting in a compact capacitor device. can be provided.

The higher the circuit voltage used by the capacitor device, the greater the effect.

Furthermore, the connection between the discharge coil 3, the internal capacitor 1, and the lead bushing 14 is simple and does not require any complicated structure.

Furthermore, since the discharge coil 3 can be accommodated by simply extending a portion of the bushing pocket 17, the manufacturing of the storage tank for the capacitor device is not so complicated.

Compared to the case where the discharge coil 3 is placed separately as shown in FIG. 2 or mounted in the upper part of the capacitor storage tank 16, the economical effect of manufacturing the capacitor device is increased for the following reason.

That is, since the discharge coil 3 is not disposed above the case-shaped internal capacitor 1, the height of the entire capacitor device can be reduced.

Further, a series reactor 2 is connected to one side of the case-shaped internal capacitor 1, and a discharge coil 3 and a lead bushing 1 are connected to the other side.
4, the length direction of the entire device becomes longer (although the width direction of the capacitor device is not increased).

Therefore, the fact that the height is low and the width is not large is very effective for transporting capacitor devices. For example, 3-phase 77KWf =
This has the effect of making it possible to transport a fully equipped 120 MVA large capacity capacitor device on a trailer.

In addition, as shown in Fig. 3, when using the outlet bushing 14 that allows the cable 24 to be attached and detached from the outside, a get-front structure with no exposed live parts can be easily obtained, eliminating the need for complex structures such as ducts. do not.

Furthermore, with the configuration shown in Figure 4, it is easy to separate each phase of the case-shaped internal capacitor of a three-phase device, and it can be easily and completely separated from the lead bushing to the series reactor. There are secondary effects such as the ability to

It should be noted that the present invention is not limited to the above-mentioned embodiments, but can also implement the configurations shown in FIGS. 6 and 7.

In these embodiments, a general overhead wiring type bushing is used as the lead bushing 14.

26 is an external overhead wiring.

This embodiment also provides the same effects as described above.

However, in the configuration shown in Figure 7, during transportation, bushing 1
Only 4 needs to be removed.

[Brief explanation of the drawing]

Fig. 1 is a wiring diagram of a capacitor device, Fig. 2 is a schematic configuration diagram of a conventional device, Fig. 3 is a component country showing one embodiment of the proposed device, and Fig. 4 is a plan view showing another embodiment of the proposed device. , FIG. 5 is a circuit connection diagram of FIG. 4, and FIGS. 6 and 7 show the components of the main parts, respectively, showing still other embodiments of the present invention. 1... Case type internal capacitor, 2...
・Series reactor, 3...Discharge coil, 4...
...Collection frame, 7゜8...Connection conductor, 13.
... Oil penetrating bushing pocket, 19...
・Reactor storage tank.

Claims (1)

[Scope of utility model registration request] In cases where a large number of case-type internal capacitors are assembled and stored together with insulating oil in a capacitor storage case, a series capacitor stored in the reactor storage case is installed on one side of the capacitor storage case via an oil-penetrating bushing. A reactor is placed, and the - of the capacitor storage case is placed.
A bushing pocket is provided on the opposite side, and a discharge coil is disposed in this bushing pocket in close proximity to the Hiji bushing attached to the bushing pocket, and the inner capacitor in the capacitor storage case and the lead-out bushing are connected to each other. A capacitor device characterized by having no partition wall between them.