JPH0113286B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a double bus type gas insulated switchgear in which the main bus bar is also gas insulated, and particularly relates to an improvement in the arrangement thereof.

When the voltage reaches extremely high voltages such as 500KV and UHV, even gas-insulated switchgear that uses SF ₆ gas as an insulator, which has a high insulation capacity, requires considerable insulation distance and is large in size. However, gas insulated switchgear for ultra-super high voltages is generally constructed using single-phase equipment.

FIG. 1 shows the arrangement of a conventional double-bus type gas-insulated switchgear, in which FIG. 1A shows a plan view and FIG. 1B shows a side view. In the figure, the power transmission/reception lines are No. 1 to No. 4 lines, each phase is represented by U, V, and W, and the first bus of the double bus is represented by A, and the second bus is represented by B, respectively. In the figure, the main bus that forms A and B buses is placed in the center of the equipment, and the power transmission and reception circuits are installed perpendicular to the main bus. A bus line 1UA, 1VA, 1WA and a bus line 1UB parallel to the ground,
1VB and 1WB are U _A −V _A −W _A −U _B −V _B −W _B
The upper bus line side disconnectors 2UA, 2VA, 2WA and the second bus line side disconnectors 2UB, 2VB, 2WB are arranged in the phase order and are connected vertically to the top of each phase bus line. Connected by 3W, and installed in the direction perpendicular to the main bus bar, 5U, 5
Connection part 4 including V, 5W and current transformer/grounding device
It is connected via U, 4V, and 4W. On the other hand, current transformers 6U, 6V, 6W and disconnectors with grounding devices 7U, 7V, 7W on the track side are connected in the axis extension direction of the disconnector, and disconnectors with earthing devices 7U, 7V, 7
Cable connection parts 8U, 8V, 8 perpendicular to the ends of W
W is connected, and power cables 9U, 9V, 9
Connected to W. The above configuration is substantially the same as that of the power transmission and reception lines No. 1 to No. 4.

Naturally, in such a configuration, Fig. 1a
As can be seen from the plan view, the main bus is monopolized to connect one power transmission or reception line to the main bus, and there is no room for connecting other lines to that part of the main bus.

The present invention was made in order to solve the above-mentioned problems, and its purpose is to configure the main bus bar part to be shared by two power transmission/reception lines (for example, No. 1 to 2 lines). To provide a compact and economically advantageous gas insulated switchgear.

In order to achieve the above object, the present invention provides a double bus type gas insulated switchgear with a single-phase configuration including the main bus bar, in which the double bus bars are arranged substantially horizontally adjacent to each other in the same phase as U-V-W or The first, which is a power transmission/receiving line, is arranged in the phase order of W-V-U, and is placed on both sides of the double bus bar, with these lines sandwiched therebetween, and perpendicular to the double bus bar.
When a second line is installed and the phase order is U-V-W, the U phase of the first line and the V phase of the second line, and the V phase of the first line and the second line If the phase order is W-V-U, the V phase of the first line and the U phase of the second line, and the W phase of the first line and the second line.
The V-phases of the lines are arranged approximately on a straight line.

An embodiment of the present invention will be described below with reference to FIGS. 2a and 2b. FIGS. 2a and 2b are a plan view and a side view showing an example of the configuration of a double-bus type gas-insulated switchgear according to the present invention, and FIGS.
The same parts as b are given the same reference numerals. In the figure, the upper bus lines 1UA, 1VA, and 1WA are placed in the center of the device.
and bus lines 1UB, 1VB, and 1WB are arranged in the phase order of U _A - U _B - V _A - V _B - W _A - W _B , adjacent to each other and substantially horizontally. On each bus bar, there are bus-side disconnect switches 2UA, 2VA, 2WA, 2UB, 2 corresponding to that busbar.
VB and 2WB are connected vertically, and as shown in the plan view of Figure a, the V phase of the No. 1 power transmission line and the W phase of the No. 2 power transmission line are connected, and the U phase of the No. 1 power transmission line and the No. .2 The V phase of the power transmission line and the V phase of the power transmission line are arranged approximately in a straight line, and in the space for 4 phases, from the front, first the No. 1 W phase, then the V phase of the No. 1 power transmission line and the No. 2 power transmission line. Line W phase, 3
Phase U of No. 1 power transmission line and V of No. 2 power transmission line
phase, and finally the U phase of the No. 2 power transmission line.

That is, by arranging two lines facing each other across the main bus bar by one phase and arranging them at an angle, it is possible to install two power transmission lines in a space for four phases. In the figure, the structure on the power transmitting and receiving side from the busbar side disconnector 2 is the same as that in FIGS. 1a and 1b, and therefore the explanation thereof will be omitted.

Note that the present invention is not limited to the above embodiments.

(1) By reversing the phase order of U-V-W to W-V-U, the V phase of the No. 1 line and the U phase of the No. 2 line, and the It is also possible to arrange it almost in a straight line with the W phase and the V phase of the No. 2 line.

(2) In the above, the shield breaker 5 is installed horizontally and has an outlet in the axial direction, but it is also possible to install the shield disconnector vertically or provide an outlet in the U-shaped direction or the Z direction. You can do it like this.

(3) The above describes the case of connecting to a power cable, but of course the same method can be applied to connecting to a gas-insulated conduit busbar and connecting to an overhead power line via an air bushing at an appropriate point. It is something that can be done.

As explained above, according to the present invention, the six phases constituting the double bus bar are arranged substantially horizontally in phase and adjacent to each other, and are arranged on both sides of the double bus bar so as to face each other perpendicularly to the double bus bar. Of each of the three phases of both lines,
Since the configuration is such that the two phases are arranged facing each other in a substantially straight line, six phases, or two circuits, can be installed in the space for four phases, reducing the installation space to two-thirds, making it economical. An advantageous gas insulated switchgear can be provided.

[Brief explanation of drawings]

Figures 1a and 1b are a plan view and a side view of a conventional double-bus type gas-insulated switchgear, respectively; Figures 2a and 2a,
b is a plan view and a side view respectively showing one embodiment of the present invention. 1...A/Otsu bus line (A: A, B: Otsu), 1UA
...U phase shell bus line, 1VA...V phase shell bus line, 1
WA...W-phase first bus line, 1UB...U-phase second bus line,
1VB...V-phase second bus line, 1WB...W-phase second bus line, 2...bus side disconnector, 2UA...U-phase first bus side disconnector, 2VA...V-phase first bus side disconnector,
2WA...W phase upper bus line side disconnector, 2UB...U
Phase 2 bus side disconnector, 2VB...V phase 2 bus side disconnector, 2WB...W phase 2 bus side disconnector, 3...
...Connection bus, 3U...U phase connection bus, 3V...
V-phase connection bus, 3W...W-phase connection bus, 4...
...Connection part, 4U...U phase connection part, 4V...V phase connection part, 4W...W phase connection part, 5...Shield breaker, 5U...U phase seam breaker, 5V...V phase breaker, 5W...W phase breaker, 6...Current transformer, 6U...U phase current transformer, 6V...V phase current transformer, 6W ...W phase current transformer, 7...Disconnector with grounding device, 7U...U phase disconnector with grounding device, 7V...
...V phase disconnector with grounding device, 7W...W phase disconnector with grounding device, 8...Cable connection part, 8U...
U phase cable connection part, 8V...V phase cable connection part, 8W...W phase cable connection part, 9...
Power cable, 9U...U phase power cable, 9
V...V-phase power cable, 9W...W-phase power cable, No. 1 to 4...Power transmission or power receiving line.

Claims (1)

[Scope of Claims] 1. In a double bus type gas insulated switchgear having a single phase configuration including the main bus bar, the double bus bar is arranged substantially horizontally adjacent to the U-V-
They are arranged in the phase order of W or W-V-U, and the first and second lines, which are power transmission/receiving lines, are installed on both sides of the double busbar, sandwiching them and perpendicular to the double busbar. However, if the phase order is U-V-W, the U phase of the first line, the V phase of the second line, and the V phase of the first line.
phase and the W phase of the second line, and the phase order is W-V-U.
In this case, the V phase of the first line and the U phase of the second line, and the W phase of the first line and the V phase of the second line.
A gas insulated switchgear characterized in that the phases are arranged substantially in a straight line.