JPS58119722A - Enclosed bus unit - 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 technical field of the invention is a sealed busbar device in which a branch connection between a gas-insulated three-phase busbar and a single-phase f# line is improved.

TECHNICAL BACKGROUND OF THE INVENTION In recent years, a large number of gas-insulated switchgears have been manufactured in response to the increasing volume of high voltage customers in power grids and the miniaturization of power transmission equipment. Gas insulated opening/closing pocket lit is the 4th unit of substation equipment! I
Since the equipment is housed in a gas insulated container and the equipment is assembled by combining them, MM performance is improved and space is reduced. A branch connection between the three-phase sealed busbar and the single-phase busbar is also opened in these locations. It is efficient to configure the company's bus as a gas-insulated three-phase sealed bus, while other equipment is adopted as a single-phase system because it is advantageous to combine single-phase equipment. Therefore, the single-phase f& line from the three-phase hermetic bus to the single-phase converter system must be branched off.

Figure 1titDouble-bus type single-phase converter Iw, which is currently often used in power stations that use extremely high voltage or higher.
□ Shows the connection side, with 2 phases each for ■ phase, ■ phase, and W phase.
Point IIAII! i! The device configuration of the V phase is illustrated as a representative example of the equipment configuration of the V phase.The 9th A three-phase bus ill and the Otsu three-phase bus 2, which are the 02 double bus system, are installed, and the thickness of the 111. 2, each bus disconnect switch la, l
b, 2a and 2b are connected, and the other end of each disconnector Clj
The circuit breaker 4a is passed through the meter current transformer 3as3b.

4° C., instrument current transformers 5a, 5b, and disconnectors 6a, 6b are connected. These systems enter from the line aerial bushing 7a and connect to the transformer connecting cable terminal section 7b.
This will lead to. Live mother @ 1 in a single wire connection system of more than °
1.2 are three-phase systems, and the others are single-phase systems.

FIGS. 2 and 3 show a conventional gas-stop switchgear corresponding to the single-wire connection shown in FIG. 1, and FIG. 3 shows the V-phase arrangement of FIG. 8g2. In both figures, both main buses A and O are 1.2ti 3-phase integrated equipment, and the rest are single-phase equipment. Center 1 between the track breaker 4a and the transformer breaker 4b: The first bus line 1 and the second bus line 2 are arranged in a two-story structure 6; #1 path unit 1a for busbars, respectively
, lb and 21.2b are provided, and the other ends of the disconnection lines for each of the busbars are connected by a flexible busbar, and the current transformer 3a13
It is connected to each breaker via b.

In the configuration 12 of these devices, the object of the present invention C2 is to improve the branch connection between the three-phase generator @1.2 and the single-phase generator [14]. That is, these branch connection configurations are shown in Fig. 4 and Fig. 5, and the inner layer of the main bus container 11: conductors 11us llv and l1w for each of the three phases are arranged, and part 8, 7 lunges ll
At a, the flange 14a of the outlet 9 of the upper T-shaped single-phase busbar container 14 is fixed to the gas-tight wire.

A conductor 13 is arranged vertically rising from the main phase conductor in the main bus container ll, and is connected to the center conductor 12 of the single-phase bus container 14v. Similarly (2 U phase, W phase each phase conductor 1
1u and llv, respectively, with single-phase conductors in the shape shown by the two-dot chain lines, and the upper T-type single-phase bus container 1.
Center conductors 12u and 12 arranged at 4u and 14v
It is connected to v. And T type single phase bus bar container 14u F
i It is connected to other equipment via the 7 langes 14'bs and 14c at both ends.

Problems with the Background Art As described above, in the conventional branch connection structure between the three-phase bus and the single-phase bus shown in FIGS. are connected through the sunrise portions 8.9, so the height hl becomes high.

This is the layout of the equipment in Figure 3 = three-phase biological mother @1
．． Branch connection part C between 2 and single-phase bus 14v: pipe size E
For example, in the 500KV class, the height 1
1 reaches approximately 5.5 to 6 m. Therefore, as a gas insulated switchgear, a strong frame is required to maintain seismic performance, resulting in high manufacturing costs. In addition, since the pull-out bushing 7a of the track wire is also determined with the position of the upper bus bar 1 as the lowest position, and other equipment is stacked and connected thereto, the position of the insulator tube becomes high, which is not favorable from an earthquake resistance standpoint. Furthermore, the operating devices of the bus line disconnection lanes 2a and 2b are mounted at a high position, making inspection work undesirable. In this way, in gas-insulated switchgear 62, even a slight increase in the height of a unit device causes cumulative wear and tear on the entire device, which reduces the durability and increases cost. Koto62.

Object of the Invention The object of the present invention is to connect the branch connections between the three-phase main bus and the single-phase bus through a rational combination.
1. To provide a sealed busbar device with improved durability, reduced space, and reduced manufacturing cost.

Summary of the Invention The present invention comprises a three-phase bus conductor arranged in a cylindrical three-phase bus container with the lower three intersections of four intersections of an O square as central axes, and the remaining Inside the single-phase bus conductor C of each phase, which passes through one intersection of the three-phase bus conductors and is arranged at intervals directly to the three-phase bus conductor; Verify. Embodiments of the Invention The embodiments of the present invention shown in FIGS. 6 and 7 will be described below. At C, draw a circle with a diameter φ in the main generatrix container 15, and determine the intersection points of the circle with the horizontal and perpendicular axes passing through the center of the circle +9.20.21 m 22. The lower three intersections 19, 20, 21
Conductors 15u and 15v for each of the three phases are located at the center.

15w, which passes through another intersection 22 and is perpendicular to the longitudinal direction of the birth control device 15, and which intersects with the intersection 19.21.
a single-phase bus bar vessel 18 with a central axis parallel to a horizontal axis passing through
v is derived from the three-phase bus container 15, and a single-phase conductor 17v is arranged around the central axis of the three-phase bus container 15. The V-phase conductor 15v to be compared in 8a Ib and the conductor 17v are connected by a vertical conductor 16v. In addition, for the U phase and W phase, vertical single phase conductors in the shape shown by the two-dot chain lines are launched from the phase conductors 15u and 15w, respectively, and the single phase bus container 1
8u, 18w inside: Horizontal single phase conductor 17u
, connected to 17W. In addition, single phase bus bar container 18v
has two connecting flanges 15a and 15b at both ends thereof, and is configured to be firmly and gas-tightly connected to other equipment.

The structure of the branch part shown in Fig. 6 and Fig. 7 (in 2), the insulation distance L1%b = and the diameter of the conductor in the branch connection part is I = J-. It is possible to achieve a structure that is well-coordinated in terms of dielectric strength.In general, the container diameter ratio of the three-phase bus container 15 and the single-phase bus container 18v is approximately 2=1. There is no need to adopt a special diameter for the diameter of the single-phase branching part, and not only can the other phase bus #5i part and 4-C2 be used, but also the single-phase bus vessel 18v and the three-phase bus vessel 15 The connection between the jacket and the outer cover can be easily made by welding the connecting line n shown in FIG.

In addition, if the unexploded busbar device is gas-insulated switchgear f
(Double use is shown in Figure N7 and Figure 8. The height Hl has been reduced to approximately 3.7-4 m compared to the conventional 5.5-6 m for 500ff class equipment.This is shown in Figure 7. As shown, each phase conductor 15u in 623-phase busbar capacity 15C.

15v, 15v, and a rational arrangement relationship between the horizontal conductor 17v of the single-phase bus 1 and its single-phase bus container 18v to the three-phase bus container 15. That is, in the conventional branch connection section C2, the three-phase bus container 11 and the single-phase bus container 14v are connected to the sunrise section 8.
However, in the present invention, it is preferable to arrange the single-phase bus container 18v in an integral structure on the same surface as the top surface of the three-phase bus container 15. .

Effects of the Invention As described above, according to the present invention C2, the branch connection part between the three-phase main bus and the single-phase bus can be made smaller and more compact.
The core strength is also lower, and gas insulated switchgear to which this is applied requires a strong frame to ensure earthquake resistance, resulting in lower manufacturing costs. In addition, since the main bus bar container and the branch sunrise part can be constructed as an integral part, it can be manufactured more easily and the manufacturing cost can be significantly reduced compared to the conventional sunrise part flange combination.

[Brief explanation of the drawing]

Figure 1 is a single-line system diagram of a gas-insulated switchgear, Figures 2 and 3 are plan and side views showing the arrangement of a conventional gas-insulated switchgear, and Figures 4 and 5 are a conventional sealed busbar system. 1 A front view and a side view showing an embodiment of the sealed busbar device of the present invention, FIGS. A plan view showing the arrangement of gas insulated opening/closing t, t to which the device is applied and i! It is an 11th view. 1.2...Three-phase birth mother IN 1a11b% 2as 2
b ”・Disconnector 3a, 3b・=Current transformer 4a
, 4b-breaker 5a, 5b... current transformer
6a, 6b...Disconnector 7a...Line aerial bushing 7b...Cable termination part 15...Three-phase main bus bar container 15u%15v%15w...Three-phase conductor 16v...
・Vertical conductor 17v...Horizontal single phase conductor 18v...
・Single-phase busbar vessel 19, addition, 21.22...intersection 23
...Welded part of single-phase busbar vessel (8733) Yoshiaki Inomata (patent attorney) (and 1 other person) Fig. 1 Fig. 4 Fig. 5 Fig. 6 Fig. 7 5v to) Fig. 8 Fig. 9

Claims (2)

[Claims] (1) At a branch connection where a single-phase hermetic bus of each phase is branched from a three-phase hermetic bus, the three-phase hermetic bus has a circle centered on its longitudinal central axis within a cylindrical three-phase bus container. Three single-phase bus conductors are arranged and formed with the lower three points of the four intersections with the horizontal axis and the vertical axis passing through the center as the central axis, and the single-phase sealed bus l1IFi and the three-phase bus conductor are Each of the three single-phase bus conductors of each phase is arranged parallel to the horizontal axis and orthogonally in the longitudinal direction of the three-phase bus container at intervals, passing through one intersection point on the upper side of the container. A sealed busbar device characterized in that a single-phase busbar conductor is arranged and connected to each matching phase conductor of the three-phase busbar. (2) The closed busbar device according to claim 1, characterized in that the ratio of the diameter of the three-phase busbar container to the diameter of the single-phase busbar container of each phase is about 2:1.