JPS6213377Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the configuration and arrangement of bus bar sections in gas insulated switchgear.

2. Description of the Related Art In recent years, with the increase in demand for electric power within large cities or in nearby areas, gas-insulated switchgears have been widely adopted as switchgears installed in substations. This gas-insulated switchgear contains a high-voltage current-carrying conductor and a switching contact inside a grounded container, along with an insulating gas with excellent insulation and arc-extinguishing properties, such as sulfur hexafluoride (SF ₆ ) gas. . Since there is no need to take an insulating distance outside the grounded container, there is an advantage that the installation space can be reduced compared to conventional switchgear. Such gas insulated switchgears are often used in substations that employ a double bus 4 bus tie system.

The equipment configuration of the bus bar division section of such a gas-insulated switchgear using the 4 bus tie system is shown in Figure 1, which is an example of a single line diagram of a substation that uses the double bus 4 bus tie system.
As shown in the figure. In FIG. 1, the busbar section 10 surrounded by the two-dot chain line includes the bow disconnector 4 on the a busbar side, the disconnectors 5 and 6, the subbus 3, and the bow disconnector 1 on the b busbar side.
4, disconnectors 15 and 16, and a sub-bus 13. When viewing the diagram of the busbar section 10, the right side shows the first unit side, and the left side shows the second unit side.

As shown in FIG.
a, 2a, 11b, 12b and sub-buses 3, 13 are all formed by three-phase busbars. and,
On the main bus side a, the main bus line 1a on the first unit side and the main bus line 2a on the second unit side are connected by a shear disconnect 4 via a sub bus 3, disconnectors 5, 6, and a single-phase bus 7. ing. Moreover, on the other hand, on the b bus line side,
The first unit-side main bus 11b and the second unit-side main bus 1b are connected by a shingle breaker 14 via a sub-bus 13, disconnectors 15, 16, and a single-phase bus 7.

In FIG. 3, on the a-bus side, the a-main bus 2a is connected to the sub-bus 3 via a disconnector 6. On the b-bus side, the b-main bus 12b is connected to the sub-bus 13 by a single-phase bus 7 via a disconnector 14 and a disconnector 16. Further, in FIG. 4, on the a-bus side, the sub-bus 3 is connected by a single-phase bus 7 via a disconnector 4 and a disconnector 5. On the other hand, on the b-bus side, the b-main bus 11b and the sub-bus 13 are connected to each other by a single-phase bus 7 via a disconnector 15.

In this way, in the conventional configuration, the sheath disconnector 4 on the a bus side and the sheath disconnector 14 on the b bus side are arranged side by side, so that the single-phase bus 7 connected to the sheath disconnector 4 is connected to the b The shape straddles the main bus bar 11b, which complicates the installation work for this part.
Main bus bar 11b, sub bus bar 13, disconnector 15 on the bus bar side
Inspection, maintenance, and repair work has become complicated and difficult. Also, the installation position of disconnector 4 is 4th.
As shown in the figure, there were some points that needed to be improved, such as the location being higher than the shiya disconnector 14 and requiring special earthquake resistance measures.

The present invention was devised in consideration of the above points, and its purpose is to provide a gas-insulated switchgear with a simple busbar section that is easy to install, inspect, maintain, or repair. The goal is to provide equipment.

Hereinafter, the present invention will be described with reference to embodiments shown in the drawings. The same parts as in FIGS. 1 to 4 are given the same reference numerals. In FIG. 5, the busbar section 10 of the gas insulated switchgear is arranged so that the main busbars 1a, 2a and 1
On the opposite side of 1b and 12b, a vertically arranged shunt switch 4 on the a busbar side is installed, and is also placed on the outside of each of the subbusbars 3 and 13, that is, on the opposite side from the a and b side busbars. There is.

Therefore, as shown in FIG.
is connected to the sub-bus 3 by a disconnector 15, a breaker 4 and a single-phase bus 7. This connection is the same as the conventional one, but since the position of the vertically arranged bow disconnector 4 is on the opposite side to the vertically arranged bow disconnector 14 as described above, it is different from the main bus line as in the conventional one. 11b
And there is no need to straddle the sub-bus 13. That is,
The breaker 4 may be installed at the same height as the breaker 14, and the single-phase bus 7 can be installed at a shorter length and lower height than in the past.

In this way, both double busbars 1a, 2a) and 11
Since the single-phase busbars 7 connected to the breakers 4 and 14 on both sides of b and 12b do not cross over other main busbars, the installation work of this part is easy, and inspection of each part of the busbar section is easy. , maintenance or repair work becomes easier, and since the equipment configurations on the A bus side and B bus side are the same, common parts can be used, and the single-phase bus used for connection has the same dimensions, making it easier to manufacture the equipment. Costs can be reduced, and there is no need to install the straightener or disconnector in a particularly high position, so there is no need for special earthquake-proofing measures.

As described above, according to the present invention, it is possible to improve workability in installation, inspection, maintenance, repair, etc., and also to reduce manufacturing costs by standardizing equipment parts.

[Brief explanation of the drawing]

Figure 1 is a single-line diagram centered on the busbar section of a gas insulated switchgear that uses a double busbar 4 bus tie system, Figure 2 is a plan view showing the busbar section of a conventional gas insulated switchgear, and Figure 3 is a sectional view taken along the line shown in FIG. 2, FIG. 4 is a sectional view taken along the line shown in FIG. 2, and FIG. FIG. 6 is a sectional view taken along the - line arrow shown in FIG. 1a...1st unit side a main bus line, 2a...2nd unit side a main bus line, 11b...1st unit side b main bus line, 12b...2nd unit side b main bus line, 4...A bus side Noshiya disconnector, 3... Sub-bus on the a bus side, 5, 6... Disconnector on the a bus side, 13...
...sub bus bar on the bus side b, 14... breaker on the bus side b, 15, 16... disconnector on the bus side b, 10...
Bus bar segment.

Claims (1)

[Scope of utility model registration request] In a gas-insulated switchgear configured in a double bus system and equipped with a busbar section in the middle of the busbar, two
For the a main bus line and the b main bus line that form the heavy bus line,
A sub-bus bar connecting the main bus bar on the first unit side and the main bus bar on the second unit side is arranged on the a main bus bar side and the b main bus bar side, respectively, and the a main bus bar and the b main bus bar In contrast, the vertically arranged bow breakers on the a main bus line side and the vertically arranged bow breakers on the b main bus side, which connect the respective sub bus bars, are connected to the a main bus bar and the b main bus bar. A gas insulated switchgear characterized in that the gas insulated switchgear is sandwiched and disposed on both sides thereof, and is disposed on the outside of the sub bus bar, that is, on the opposite side of the main bus bar.