JPS5996805A - Gas insulated electric device - 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 The present invention relates to gas-insulated electrical equipment, and particularly to improving the current carrying capacity of gas-insulated busbars.

In recent years, reduced-sized SF and gas-insulated switchgear have become widely used as a countermeasure against land issues and environmental harmony, and there is also a growing trend to promote the use of gas-insulated power transmission lines that connect to switchgear.
A gas-insulated busbar, which is a gas-insulated electrical device, has a conductor supported by a solid insulator inside a metal jacket. This is a gas-insulated power transmission line filled with pressure. Cables are used for the same purpose, but gas-insulated busbars have the characteristic of being able to carry a large current such as KIKk-/2KA through one conductor, compared to a single conductor. If you want to run the bus, you would have to line up several busbars in parallel, which is a hassle, but gas-insulated busbars have the advantage of only needing one busbar.

Therefore, this gas-insulated busbar may need to be installed not only inside a substation but also over a considerable distance, and may need to be installed at a location with a difference in height. In such cases, where there is a difference in height, the gas inside the higher part becomes considerably hotter than the gas at the lower part, and when passing a large current, the upper conductor, its contact parts, or solid insulators, etc. The temperature rise value will exceed the rated value, and the current carrying capacity may decrease. For example, if the altitude difference is 1
If it is longer than 0m, there will be a temperature difference of several degrees between the top and bottom.

This invention has been made in view of the above points, and provides a gas insulated bus bar that can suppress temperature rise at high places even when installed in a place with a difference in height, and therefore has a large current capacity. The purpose is to

In order to achieve the above object, the gas insulated electrical equipment of the present invention has a structure in which a conductor connected through an electrical connection part is supported by a solid insulator in an envelope filled with an insulating gas. , at least a part of the outer cover is arranged vertically or inclined, a heat radiation part is provided at or near the vertical or inclined part, and the electrical connection part is provided at a position not higher than the heat radiation part, Moreover, it is characterized in that a communication path is provided that communicates the chambers on both sides of the solid insulator immediately below the heat dissipation section at least in the vertical or inclined section.

The present invention will be specifically described below with reference to the illustrated embodiments.

In the embodiment shown in FIG. 1, the outer cover l is filled with an insulating gas such as SF & gas pressurized to q atmospheric pressure '8 degrees,
This part of the jacket 1 is a vertical part with a difference in height and is connected to a substantially horizontal jacket 2.3 which is also filled with SFA gas.

Inside the jacket l there is also a vertically extending conductor,
Conductors placed horizontally! , 6 and sliding contacts 7, g. conductor! , 6 are supported within the outer sheath 3 by insulating pacers 9 and 10 made of solid insulators, respectively.

The insulating spacers 9, 10 are conical and also serve as partitions between adjacent gas spaces. There is a cylindrical insulating spacer that supports the thin conductor S inside the jacket, and a similar insulating spacer/2. /3 supports the conductor DA in the jacket l. Insulating spacer 1/, /2. /3 has a structure in which the chambers on both sides of the spacer are not isolated, but have a communication path that circulates between the two chambers. The vertical part of the jacket 1 is located at a higher position than the electrical connection part. 7
It is better to provide a heat dissipation fin/IIa as shown in the figure, but it is also possible to simply extend the outer cover.

In a gas-insulated electric device having the structure shown in FIG. 1, when electricity is started, the conductors f, t, and A, the contact 7, which is an electrical connection part. The,
The temperature of the outer sheaths 1, 2, 3, etc. increases, and the temperature of the internal gases also begins to rise. In this case, in the horizontally arranged part, the temperature rise value is equal for each corresponding part, but in the vertically arranged part, the conductor l, which has a particularly large temperature rise, and the gas near the 7° contact point are warmed and become lighter. , to the top,
As shown by the arrow a in the figure, it rises to 5 and reaches the heat radiation part /4'. The gas that has reached the heat dissipation section tllJ7 is effectively radiated into the atmosphere from the surface of the heat dissipation section and is cooled.
It flows downwards like an arrow. Since this cooled gas rises again from the bottom along the conductor, the temperature of the conductor and therefore the part of the vertically arranged gas-insulated electrical equipment no longer rises more than the other horizontally arranged parts, and the rated current can flow sufficiently. Become.

FIG. 2 shows another embodiment, in which the conductor da.

S, 6 is made hollow, and the conductor 1 and the contacts 7, 3 are connected to the gas passage 1, /&, /7. /g, /9. The only difference from FIG. 1 is that -0 is provided to allow gas to flow inside the conductor, so equivalent partial pressures are given the same symbols.

When energized, the gas inside the conductor, which has the largest temperature rise, rises to the top and is cooled by the heat dissipation section /4', creating a gas circulation path as shown by the arrow, and the conductor and its contacts 7. f, etc. are effectively cooled, and the temperature does not rise in the horizontal gas-insulated power transmission section 1.

In the above embodiment, the difference in height is connected by a vertical part, but it does not necessarily have to be vertical, and even if it is arranged at an angle, it is the same as in Fig. 1, and by providing a heat dissipating part / l at a high place, A similar effect can be obtained by cooling the

FIG. 3 shows an example in which the slope part is very long.
The same parts as in Figures 2 and 2 are given the same symbols, so
Explanation will be omitted. Since the sloped part is long, an insulating spacer is installed in the middle to divide the gas section, and each section has a heat dissipation section.
1.22 is established.

A contact 7, which is an electrical connection part, is placed at a position not higher than the heat dissipation part.
．． The same goes for establishing a time zone. Heat dissipation part l hiro.

22 is preferably provided with two heat dissipating fins/lIa and two a, as shown in FIGS.

By setting K in this way, even if the slope is very long, there will be no part where the temperature rises more than the horizontal part, so the rated current can flow sufficiently, and there is an effect that the current capacity will not decrease. .

In the above example, a so-called single-phase type with only one conductor in one jacket was shown, but a three-phase type gas insulated type with conductors for three phases housed in one jacket was shown. Electrical equipment (busbar)
The present invention can be similarly applied to.

Further, although the above example shows a simple gas-insulated busbar, the present invention can also be applied to a main busbar used for internal pressure of a gas-insulated switchgear or a busbar for connection of various devices.

According to this invention, as described above, since a heat dissipation part is provided in the vicinity of the vertical or inclined part, it is possible to suppress the temperature rise at high places even in places with height differences, and therefore the current capacity This has the effect of providing a gas-insulated bus bar with a large value.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view schematically showing one embodiment of the gas-insulated electric device of the present invention, FIG. 2 is a cross-sectional view showing another embodiment, and FIG. 3 is a schematic cross-sectional view showing another embodiment of the gas-insulated electrical equipment of the present invention. Cross-sectional view, Figure 1,
FIG. S is a partial perspective view showing an embodiment of the heat dissipation section. l:! ,,3... Outer covering, da...! , 6... Conductor, ? ,l
f...Sliding contact, /θ...Insulating spacer, //
, /2. /, 3...Cylindrical insulating spacer, /g, here...
・Heat dissipation part, tea, 2 cores a... fin, /j? , /4.
/ri, /I, /'? @2゜Conflict/passage, 2/...Insulating spacer. In each figure, the same reference numerals indicate the same or corresponding parts. Agent Makoto Kuzuno - Figure 1 Procedural Amendment (Spontaneous) November 1, 1980 Commissioner of the Japan Patent Office 1, Case. Display Patent application Showa 5t-toe roller No. 1 2,
Name of the invention Gas Zekkan Electrical Equipment 3, Person making the amendment k Details of the amendment 1) The scope of claims of this application is amended as shown in the attached sheet. Page 3 of the specification / 0. The line "Characteristics of gas-insulated electrical equipment..." should be corrected as follows. [In a gas-insulated electric device, which has a vertical or inclined part in which at least a part of the outer jacket is arranged vertically or inclined, the vertical or inclined part has a structure on the upper part for cooling the internal gas. It is characterized by being equipped with a heat dissipation part, and can prevent a temperature difference between the upper and lower parts in a vertical or inclined part. ” Force Correct “cylindrical” in line S of page 3 of the same to “cylindrical”. Claims (1) A gas-insulated electric device having a structure in which a conductor connected through an electrical connection part is supported by a solid insulator in an outer sheath filled with an insulating gas, wherein a small amount of the outer sheath is Qi equipment. (2) A patent claim characterized in that the vertical or inclined part of the envelope is very long and is divided into a plurality of gas sections by a solid insulator, and each gas section is provided with a heat dissipation part in its upper part. Gas-insulated electrical equipment as specified in Scope No. (3) A gas-insulated electric device according to claim 1 or 1, characterized in that a gas passage is provided inside the conductor.

Claims (3)

[Claims] (1) In gas-insulated electrical equipment that has a structure in which a conductor connected via an electrical connection part is supported by a solid insulator in an outer sheath filled with an insulating gas, at least a portion of the outer sheath is vertical or inclined. A heat dissipation part is provided at or near the vertical or inclined part, and the electrical connection part is provided at a position not higher than the heat dissipation part, and at least immediately below the vertical or inclined part. A gas-insulated electrical device characterized by having a communication passage connecting chambers on both sides of a solid insulator. (2) The part of gas-insulated electrical equipment filled with SFaF2 gas, which has excellent insulation performance, is arranged vertically or inclinedly, and is very long and divided into several gas sections with solid insulators, each of which 2. The gas insulated electrical equipment according to claim 1, further comprising a heat radiation section provided at the highest part of the gas section for cooling the internal gas. (3) A gas-insulated electric device according to claim 1 or 2, characterized in that a gas passage is provided inside the conductor.