JPH02262809A - Collective substation - Google Patents

Abstract

PURPOSE:To reduce installation area and to shorten installation schedule by making the faces, requiring no maintenance, of an extra-high-tension power receiving switchgear abut on an extra-high-tension, high voltage or low voltage distribution switchgear, and then jointing and securing then physically. CONSTITUTION:A cable head 35 is fixed to a 66kV DS board 15 constituting a 66kV C-GIS 10, then the 66kV DS board 15 is connected through a 66kV cable 36 with the primary bushing of transformer. A 6.6kV cable 37 connected with the secondary bushing of transformer (not shown in the figure) is connected with the cable joint 38 of a 6.6kV power receiving board 25 constituting a 6.6kV distribution switchgear 11. The transformer is arranged at a random position around collected 66kV C-GIS 1 and 6.6kV distribution switchgear 11. By such arrangement, maintenance/inspection space of substation can be reduced and cable laying pit can be used commonly.

Description

Detailed Description of the Invention [Object of the Invention] (Industrial Application Field) The present invention relates to an extra high voltage switchgear, a transformer that steps down from extra high voltage to extra high voltage, high voltage or low voltage, and extra high voltage, high voltage or low voltage switch. This relates to collective substation equipment consisting of gears.

(Prior Art) Hereinafter, the conventional technology will be explained by taking 66KV/6.6KV substation equipment as an example.

66KV class power receiving equipment includes: ■Open type power receiving equipment, ■Housing type power receiving equipment, and ■Gas Insulated power receiving equipment (GIS; Gas In5uQation Sw).
itchgear), 0) Cubicle type gas insulated power receiving equipment (C-GIS; CubicQe type GI
S).

By the way, the above-mentioned open power receiving equipment is a circuit breaker.

It was an outdoor power receiving facility that used air insulation to connect electrical equipment such as disconnectors, grounding disconnectors, instrument transformers, and lightning arresters using stranded copper wire and aluminum pipes. For this reason, each electrical device is arranged and connected in a straight line, which requires a large installation space.Also, because the outdoor air insulation method is used, live parts are exposed, and it is necessary to shut off power to nearby circuits during maintenance and inspection. , there were problems with quality electricity supply. In heavily polluted areas near large cities and coastal areas, the above-mentioned housing-type power receiving equipment was used and indoor air insulation was used to reduce flying objects and pollution.

However, as construction costs and land prices soared, live parts became contaminated.

Safety, J! Due to problems such as noise and high-quality power supply, there was a demand for smaller and more sealed power receiving equipment, and the above-mentioned gas-insulated power receiving equipment was developed. In this system, each of the above-mentioned electrical devices is covered with a pipe-shaped metal container, and high-pressure sulfur hexafluoride gas (hereinafter referred to as "SF" gas) is sealed as an insulating medium to make it compact and airtight. The above-mentioned cubicle-type gas-insulated power receiving equipment is superior to the above-mentioned GIS in that it has higher reliability, safety, and simplifies maintenance and inspection, can be constructed in a short period of time on a narrow site, and meets the requirements for environmental harmony with the surrounding area. It was developed to meet this need. This uses a low-pressure insulating gas near atmospheric pressure as an insulating medium, and all electrical equipment is housed in a rectangular container.It has an appearance similar to that of an air-insulated switchgear of 33 V or less.

66KV/6.6KV transformer is ■oil insulated transformer,■
It has been transitioning to gas insulated transformers. Also, 6.6KV
The power distribution equipment has changed in line with the introduction of 66KV power receiving equipment, and although it is an open type and the housing is the same, from then on, electrical equipment such as main circuit live parts, circuit breakers, disconnectors, etc. were combined into a rectangular type. The switchgear has been moved to air-insulated switchgear, which is housed in a contact metal container and uses air as the insulating medium. For this reason,
To configure a substation facility, it was not possible to simply electrically connect the three devices. As an example, FIG. 5 shows a perspective view of conventional substation equipment. 66KV C-GIS 1
, a transformer 2, and a 6.6KV switch gear 3, and because they are only electrically connected, they are distributed in a distributed manner.

(Problems to be Solved by the Invention) FIG. 6 shows the plan view of FIG. 5, a 66KV C-GI
S1 and 6.6KV switch gear 3 were front and rear maintenance type switch gears with doors at the front and rear. Therefore, a maintenance and inspection space 4 is required for maintenance and inspection of each device. One of the reasons for the distributed arrangement is that
This maintenance and inspection space 4 can be mentioned. Since this maintenance and inspection space 4 is required, the installation area of the substation equipment becomes large, and there is a limit to the reduction of this area.

Furthermore, due to the distributed arrangement, cable connection work and cable laying pit work were required to electrically connect each device on-site, which increased construction time and construction costs.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide collective substation equipment that can reduce the installation area and shorten the on-site construction period.

[Structure of the invention]

(Means for Solving the Problems) The present invention provides front and side maintenance type special high voltage switches for power reception in substation equipment comprising special high voltage switch gears for power reception, transformers, and special high voltage, high voltage or low voltage switch gears for power distribution. It is assembled by physically connecting and fixing the gear and the non-maintenance side of the front maintenance type power distribution special high voltage, high voltage or low voltage switchgear in contact with each other.

(Function) As a result, the space for maintenance and inspection of substation equipment can be reduced, and the cable laying pit can be shared.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings, taking 66KV/6.6KV substation equipment as an example. FIG. 1 is a single line connection diagram of an embodiment of the present invention.
Regular spare 2CB power reception - Secondary bank - Next D described in Volume No. 4
Figure 2 shows an example of standard connection of special high voltage power receiving equipment of S.
1 shows a partially cutaway plan view of an embodiment of the present invention. FIG.

In Figures 1 and 2, the collective substation equipment is 6
It is composed of a 6KV switch gear 10, a transformer (not shown), and a 6.6KV switch gear 11 for power distribution. Here, the 66KV switch gear 10 for power reception is 66KV
Since it is a C-GIS, in the following explanation, the power receiving 6
6KV switch gear 10 is called 66KV C-GISIO.

66KV C-GISIO is located remotely
It is placed between the two sides of the V power receiving board 13 and this 66KV power receiving board 13, and is connected to a power company-supplied transaction meter current transformer (
The 66KV PCT board 14 connecting the 66KV PCT) 12 is placed on one side, and the 66KV DS g is arranged so as to protrude from one side (the upper side in Fig. 2) of each 66KV power receiving board 13.
115 on two sides. In addition, each board is filled with SF and gas, making it a transportation unit. At the installation site, bolts are tightened at the aerial part of each panel and the panels are fixed side by side. Each panel accommodates electrical equipment shown in the single-line connection diagram of FIG. 1, respectively.

The 66KV power receiving board 13 is provided with a 7ti13a and a circuit breaker 16. Disconnector 17. It is now possible to perform maintenance inspection and operation of the earthing/disconnecting switch 18 (
A similar example is shown in FIG. 6 of Japanese Unexamined Patent Publication No. 60-160309). Also, on one side of the 66KV power receiving board 13.

A side plate 13b is provided on the portion of the 66KV DSSi 20 excluding the contact surface, and a work for connecting the 66KV cable 19 drawn from the power company to the side plate 13b to the cable head 20. A door 13c is provided.

The 66KV PCT board 14 has a part that protrudes from the no side surface of the 66KV power receiving board 13, and the flange 14 is attached to this part.
A is provided and is connected to the PCT 12.

66 is equipped with V DSSi20 and door 15a,
Disconnector 21 housed inside. The earthing/disconnecting switch 22 can be maintained, inspected, and operated. Also, door 15a
A side plate 15b is provided on the side surface excluding the surface in contact with the 66KV power receiving board 13.

The method of arranging these panels is to bring the non-maintenance surface 13d of the 66KV power receiving board 13 and the non-maintenance surface 14b of the PCT panel 14 into close contact with each other back to back and connect them with bolts (not shown).

66, non-maintenance side 13e of V power receiving board 13 and 66KV DS
The non-maintenance surfaces 15c of the panel 15 are placed back to back and connected with bolts (not shown). In this case, doors 13a and 51
Make sure that the sides of 5a are the same. As a result, 66KV
The mechanical connection of C-GISlo has been completed, but in this state, when viewed from above, it has a shape similar to that of 11 E It laid down on its side, and serves as a switchgear for front and side maintenance.

Next, a method for electrically connecting the main circuit will be explained. A busbar connection device known from Japanese Patent Application Laid-Open No. 60-160309 is attached to the ceiling of each panel, and electrically connected by a cable. That is, the bus bar connection bag @ 23a for 3 phases is attached to the V power receiving board 13 at 66, and the 66KV PC
A busbar connecting device 23b for three phases is attached to the cutting board 14, and both busbar connecting devices 23a, 23b are connected by a cable 24a. This completes the connection on the primary side of the PCT 12. In addition, a two-phase busbar connection device 23c is attached to the 66KV PCT panel 14, and the 66KV
A three-phase busbar connection device 23d is attached to the O5 panel 15, and one and both busbar connection devices 23c and 23d are connected by a cable 24b. As a result, two phases of current elements of the PCT 12 are connected. Here, the voltage component of PCT 12 is:

As long as it is electrically connected, 66KV power receiving board 1
The 66KV DSSi 20 is connected via a cable 24c from the opposite side of the busbar connection device 23a, which is placed in the middle phase of the busbar connection device 23a.

This completes the connection on the secondary side of the PCT 12.

With the above, the electrical and mechanical connection work of the 66KV C-GIS 10 has been completed.

In addition, the 66KV switch gear 11 for power distribution has two 66KV power receiving panels 25 and one surface has a 66KV busbar communication panel 26.
The 66KV in-house transformer panel 27 is composed of one side and the 66KV distribution lineboard 28 is composed of four sides. In addition, the distribution board 28
has a structure in which circuit breakers 29 can be stacked in three stages. In addition, each panel has a publicly known configuration, and has a front maintenance type structure with a front door 30 so that internal inspection and maintenance, circuit breaker operation, etc. can be performed, and the back side is a non-maintenance side. . In addition, these panels are arranged in rows and mechanically connected with bolts (not shown), and electrical connections between the panels are made via a motherboard IIX (not shown) provided on the ceiling inside the panel. It is being said.

As a result of the above, the electrical and
This means that the mechanical connection work has been completed.

Next 4. :, 66KV C-GIS 10 and power distribution 6.
Explaining the connection of the 6KV switch gear 11 The front surface (lower surface in Fig. 2) of the 66 KV C-GIS 10 configured as a side-by-side panel 31a and the back surface 31b of the 6.6 KV switch gear 11 for power distribution are non-maintenance surfaces. ing. The valve maintenance surfaces 31a and 31b are brought into close contact with each other back to back and connected with bolts (not shown).

As a result of the above, 66KV C-GIS 10 and power distribution 6,
The 6KV switchgear 11 is mechanically connected and aggregated.

Further, electrical connection is made by interposing a transformer 2 between the 66KV C-GIS 1 [: power distribution 6.6 and the V switch gear 11]. FIG. 3 shows a sectional view taken along the line A--A in FIG. 2.

As shown in the figure, the 66KV DS l115 composing the 66KV C-GIS 10 is connected to the cable head 3.
5 is attached, and is connected to the primary bushing of the transformer via a 66KV cable 36 connected to this cable pend 35. In addition, a 6.6KV cable 37 connected to the secondary bushing of the transformer (not shown) is
6,6K that constitutes the 6.6KV switch gear 11 for power distribution
Connect to the cable connection part 38 of the V power receiving board 25. In addition,
Transformer 2 is a grouped 66KV C-GIS 10
It is installed at any location around the 6.6KV switch gear 11 for power distribution.

66KV C-GIS to aggregated as above
A perspective view of the power distribution 6.6KV switch gear 11 is shown in the fourth figure.
As shown in the figure.

Although the above description has been made regarding the main circuit, the control circuit can be connected inside the switchgear.

By configuring as described above, the space for maintenance and inspection of the substation equipment can be reduced, and the cable installation pit can be shared.

Therefore, the installation area of the 66KV/6.6KV substation equipment can be significantly reduced, the pit construction can be reduced by sharing the cable pit, and the site purchase cost, construction cost, and construction period for the substation equipment can be significantly reduced.

In addition, in the above embodiment, the voltage on the secondary side of the transformer is set to 6.
Although 6KV is used, it goes without saying that it can be applied to any of 22KV, 440V, or 220V.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to reduce the installation area of substation equipment and shorten the on-site construction period, and it is possible to reduce overall costs. In particular, with regard to power substation equipment for buildings in modern large cities, the land is expensive, the building construction period is short, and many electronic devices such as computers are installed, so from the perspective of supplying high-quality electricity, However, reliability has improved. In addition, cubicle-type switchgears are excellent in terms of environmental friendliness when used as substation equipment in buildings.

[Brief explanation of drawings]

FIG. 1 is a single-line connection diagram of an embodiment of the present invention, FIG. 2 is a partially cutaway plan view of an embodiment of the present invention, and FIG.
4 is a perspective view of FIG. 2, FIG. 5 is a perspective view of the conventional substation equipment, and FIG. 6 is a plan view of FIG. 5. 2...Transformer 4...Maintenance and inspection space 10...66KV switch gear for power reception 11...6.6KV switch gear for power distribution (8733)
Agent Patent attorney Yoshiaki Inomata (and 1 other person) Figure 1 (J, Joen

Claims (1)

[Claims] In substation equipment consisting of special high voltage switchgear for power reception, transformers and special high voltage, high voltage or low voltage switchgear for power distribution, front and side maintenance type special high voltage switchgear for power reception and front maintenance type special high voltage, high voltage or Collective substation equipment characterized by the non-maintenance surfaces of low-voltage switchgear being brought into contact and physically connected and fixed.