JPH0576109A - Transforming facility - Google Patents

Abstract

PURPOSE:To facilitate installation of optical CT in vertical bus type transforming facility without requiring troublesome work. CONSTITUTION:A vertically arranged third bus 18 is anchored, at the lover end thereof, to the base 15a of a supporting steel tower through an anchor insulator 20a containing an optical fiber and optical connectors 20a1, 20a2 are disposed, respectively, at the upper and lover ends of the anchor insulator 20a. An optical CT 25a is connected through an optical fiber cable to the optical connector 20a1 at the upper end thereof wherein the optical CT 25a is disposed closely to the fixed side terminal 17a3 of a horizontal double-break disconnector and produces an optical signal having intensity modulated according to the current value of the third bus 18. On the other hand, the lower end optical connector 20a2 is connected with an optical fiber, contained in a flexible conduit 27a, having the other end connected with a central abnormality monitor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a substation facility and, more particularly, to a substation facility (vertical array bus type substation facility) having a busbar which is vertically connected with one end thereof connected to a ground disconnector.

[0002]

2. Description of the Related Art In order to monitor a power transmission state, an optical CT (hereinafter referred to as one for applying a magnetic field generated by a bus current to a Faraday element to modulate and output an optical signal) is to be arranged on a bus. In this case, an insulator incorporating an optical fiber is required to guide the optical signal output from the optical CT to an optical transmission line connected to an external centralized monitoring device. In this case, the optical CT is arranged in the vicinity of the supporting insulator and the supporting insulator is replaced with an insulator having a built-in optical fiber, or an insulator having a new optical fiber is arranged in the vicinity of the optical CT.

In a conventional vertical bus type substation facility, when an optical CT is arranged in the busbar near a connection portion with a disconnector,
The supporting insulator of the disconnector is replaced with a supporting insulator with a built-in optical fiber, or a dedicated insulator with a built-in optical fiber is arranged near the disconnector.

[0004]

The above-mentioned conventional substation facilities have the following problems. Since the disconnector supports the movable side contact and the fixed side contact individually with the support insulator, when replacing the support insulator of the disconnector, the height of the insulator with the built-in optical fiber and other insulators They must be matched, and delicate contact adjustments must be made by targeting the disconnector.

On the other hand, when arranging a new insulator with a built-in optical fiber, it is necessary to start the work of arranging a new support frame for supporting the insulator, which prolongs the construction period and causes extra cost. It could end up happening.
In addition, the vertical bus system is a method to reduce the installation space, and in the substation facility that adopts the vertical bus system,
In many cases, there is not enough room to newly install an insulator with a built-in optical fiber.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a substation facility in which an optical CT can be easily arranged without requiring troublesome construction.

[0007]

In order to achieve the above object, the invention according to claim 1 is such that both ends of a bus bar arranged in a substantially vertical direction are supported on a supporting tower through a retaining insulator and at the same time the bus bar is supported. In a substation in which the lower end side of is connected to one terminal in the disconnector, the retaining insulator on the lower end side is an insulator with an optical fiber built-in, and in the distribution path from the bus bar to the disconnector, A monitoring means for monitoring the power transmission state and outputting an optical signal indicating the power transmission state is provided, and the monitoring means is connected to the optical fiber in the retaining insulator.

[0008]

In the invention according to claim 1 configured as described above, among the existing retaining insulators supporting the bus bar, the retaining insulator on the lower end side close to the disconnector is an insulator incorporating an optical fiber. Therefore, the optical signal output from the monitoring means is output to the outside via the retaining insulator.

That is, instead of a supporting insulator for a disconnecting switch or a dedicated insulator, an existing retaining insulator is used as an insulator with a built-in optical fiber, and an optical signal is output to the outside through the retaining insulator.

[0010]

As described above, according to the present invention, since it is not necessary to replace the supporting insulator of the disconnector, it is not necessary to perform a complicated height adjustment, and a new dedicated insulator is not used. Therefore, it is not necessary to newly install a support frame or the like, and it is possible to provide a substation facility in which the optical CT can be easily arranged.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a substation to which a substation facility according to an embodiment of the present invention is applied. A substation facility (not shown) is provided on the right side, and a busbar 11 is provided on the supporting steel tower 10 on the left side in the figure from the substation facility.

In the figure, from the substation equipment to the support tower 10
The first busbars 11 arranged in the direction of the depth of the paper are three-phase components (respectively referred to as busbars 11B, 11R, and 11W, and unless otherwise specified below, they are referred to as busbars 11 on behalf of the three-phase components. .) Are installed side by side and support tower 1
The second busbar 14 (14) whose both ends are supported by the insulators 13a and 13b for retaining the first tower 12 in the middle of 0
B, 14R, 14W).

The lower end of the second busbar 14 is a horizontal two-point disconnecting switch (disconnector) 17a disposed between the first tower 12 and the second and third towers 15 and 16 arranged on the left and right sides of the first tower 12. , 17
It is connected to one of the fixed-side terminals 17a1 and 17b1 in b. The fixed side terminals 17a1 and 17b1 are drive segments 17a in the horizontal two-point disconnecting path devices 17a and 17b.
2, 17b2 are connected to the other fixed side terminals 17a3, 17b3 by driving them to predetermined positions, and are connected to the lower ends of the third busbar 18 and the fourth busbar 19 connected to the fixed side terminals 17a3, 17b3. ..

Both ends of the third busbar 18 and the fourth busbar 19 are retained with respect to the second tower 15 and the third tower 16, respectively, and insulators 20a and 20b for retaining and insulator 21 for retaining.
The fifth busbars 22B, 22R, 22W and the sixth busbars 23B, 23R, which are supported by a and 21b and are arranged in the front-back direction with respect to the paper surface with different heights for each of the three phases, Two
It is connected to 3W.

As shown in FIG. 2, the lower end of the third bus bar 18 (the fourth bus bar 19 (hereinafter, the fourth bus bar side is described in parentheses)) is connected to the second tower through the retaining insulator 20a (21a). 1
5 (third tower 16) is moored to the base 15a (16a). This retaining insulator 20a (21a) is an insulator 24 with a built-in optical fiber used as a supporting insulator for a disconnector.
Are connected in two stages. Inside each optical fiber built-in insulator 24, an optical fiber forming an optical transmission path from the upper end to the lower end is arranged, and a connecting portion of both optical fiber built-in insulators 24. In, the optical transmission lines formed by the respective optical fibers are connected.

An optical connector 20a1, which connects an optical transmission line formed by an external optical fiber cable and an optical transmission line formed by an internal optical fiber to the upper and lower ends of the retaining insulator 20a (21a). 20a2 (21a1, 21
a2) is provided, and the optical connector 20a1 at the upper end is provided.
An optical fiber cable 26a (26b) having the other end connected to the optical CT 25a (25b) is connected to (21a1).

The optical CT 25a (25b) is connected to the fixed-side terminal 17a3 of the horizontal two-point cutting circuit 17a (17b).
It is arranged near (17b3) and the third bus bar 18
The retaining insulator 20a on the (fourth bus bar 19)
From the connection point with (21a), the fixed side terminal 17a3 (1
7b3) and outputs an optical signal whose intensity is modulated according to the current value and the voltage value of the power distribution line.

An optical fiber cable housed in a flexible conduit 27a (27b) is connected to the optical connector 20a2 (21a2) at the lower end of the retaining insulator 20a (21a), and the other end is connected to a monitoring device (not shown). The connected monitoring device restores the current value and the voltage value of the third bus line 18 (fourth bus line 19) based on the modulated optical signal and monitors the occurrence of abnormality.

In each of the above-mentioned optical fibers and optical fiber cables, an optical signal before modulation is input to the optical CT2.
5a, 25b cable and optical fiber CT25
It has a two-core structure with a cable for transmitting an optical signal after being modulated by a and 25b.

When constructing the substation facility of the present embodiment having the above-mentioned structure, the power supply path is cut off, and the existing retaining insulator (not shown) at the lower end side is replaced with the retaining insulator 20a (21a) having an optical fiber.

Further, the horizontal two-point cutting path device 17a (1
7b) in the vicinity of the fixed side terminal 17a3 (17b3) and from the retaining insulator 20a (21a) on the third busbar 18 (fourth busbar 19) to the fixed side terminal 17
a light CT25a (25
b) is provided and this optical CT 25a (25b)
And the optical connector 20a1 (21a1) at the upper end of the retaining insulator 20a (21a) to the optical fiber cable 2
Connect with 6a (26b).

Further, the flexible wire tube 27a (27b) is connected to the optical connector 20a2 (21a2) at the lower end of the retaining insulator 20a (21a), and the flexible wire tube 27a is connected.
The other end of the optical fiber cable installed in (27b) is connected to a centralized monitoring device (not shown).

After that, when power is supplied to the third bus bar 18 (fourth bus bar 19), the optical CT 25a (25b) is based on the current value and the voltage value flowing through the third bus bar 18 (fourth bus bar 19). Modulates an optical signal. That is, the optical signal for modulation is input into the optical CT 25a (25b) by one of the cables of the optical fiber cable having the two-core structure, and the optical CT 25a (25b) is based on the current value of the other cable for each set. And output the modulated optical signal.

The modulated optical signal is retained by the optical fiber cable 26a (26b) in the insulator 20a (21).
a) and the insulator 20a (21)
Flexible conduit 27a via the optical fiber built in a)
It is transmitted from (27b) to an external centralized monitoring device.

As described above, in the substation facility of this embodiment, the optical CT arranged in the power distribution path can be converted to an external centralized monitoring device by simply replacing the existing retaining insulator with the retaining insulator having a built-in optical fiber. An optical transmission line that can be connected can be formed, and the construction can be completed extremely easily. Also, at this time, each terminal 1 in the horizontal two-point disconnecting circuit 17a, 17b
No height adjustment of 7a1 to 17a3 and 17b1 to 17b3 is required.

In the embodiment described above, the two insulators 24 with a built-in optical fiber are fixedly connected to each other to form the retaining insulator at the lower end.
When 4 are connected, a vibration absorbing mechanism may be interposed between them to absorb a slight vibration.

Further, the optical CT 25a (25b) outputs an optical signal modulated by a current value, but the detection target does not necessarily have to be a current value, and necessary information such as voltage and temperature is output. Anything that outputs an optical signal may be used.

[Brief description of drawings]

FIG. 1 is a front view of a substation to which a substation facility according to an embodiment of the present invention is applied.

FIG. 2 is a front view showing an arrangement portion of a retaining insulator.

[Explanation of symbols]

 10 ... Support tower 15 ... Second tower 16 ... Third tower 17a, 17b ... Horizontal two-point cutting path device 17a3, 17b3 ... Fixed side terminal 18 ... Third busbar 19 ... Fourth busbar 20a, 20b, 21a, 21b ... Retaining Insulators 20a1, 20a2, 21a1, 21a2 ... Optical connector 24 ... Insulator with built-in optical fiber 26a, 26b ... Optical fiber cable 27a, 27b ... Eflex tube 25a, 25b ... Optical CT

Claims (1)

[Claims] 1. A substation facility in which both ends of a bus bar arranged in a substantially vertical direction are supported by supporting steel towers via retaining insulators and the lower end side of the bus bar is connected to one terminal of a disconnector. The retaining insulator on the lower end side is an insulator having an optical fiber built-in, and a monitoring means for monitoring the power transmission state and outputting an optical signal indicating the power transmission state is arranged in the electric path from the bus bar to the disconnector. A substation facility characterized in that the monitoring means is installed and is connected to the optical fiber in the retaining insulator.