JP2000134800A - Power supply equipment litilizing overhead ground wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the size of a power supply equipment by making possible the connection of a primary winding type CT, even to an optical fiber overhead ground wire(OPGW). SOLUTION: Armoring conductive sections of OPGWs 1L, 2L laid on both sides of an iron tower 1 are insulated and supported and are cut. The ends of the conductive sections are connected to one ends of the primary windings of winding type CTs 4-7. The outer ends of the primary windings are ground and connected to the main body side of the iron tower 1, to take out current induced in the armoring conductive sections as power from the secondary windings. For the winding type CT, one having a tap in the middle of the primary winding is used. The tap is grounded, and both ends of the winding are connected to the armoring conductive section of OPGWs 1L, 2L.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device installed on an overhead ground wire for the purpose of securing power supply for an aviation obstruction light or the like disposed on a power transmission tower.

[0002]

As already proposed by the present applicant as Japanese Patent Application No. 9-55897 "A power supply device utilizing an overhead ground wire", such as an aviation obstruction light or the like arranged on a power transmission tower. For the purpose of securing a power supply, an attempt has been made to connect a primary winding type CT to an overhead ground wire installed in parallel with a transmission line and to extract and use an induced current generated by a current of a power transmission main line. However, this power supply
This is intended for a conventional overhead ground wire consisting of only a conductive wire, and is installed as it is on an optical fiber composite overhead ground wire (hereinafter referred to as OPGW) which also serves as an information communication transmission line, which is increasing in recent years. I couldn't do that.

In other words, in the case of OPGW,
Only through-type current transformers that can be electromagnetically coupled with the OPGW without contact can be used. Since this feedthrough current transformer has a primary winding that passes through an overhead ground wire for one turn, in order to obtain sufficient power, a large number of large feedthrough current transformers are connected in series and parallel. The size of the device and the cost. Therefore, an object of the present invention is to make it possible to connect the primary winding type CT to the OPGW and to reduce the size of the power supply device.

[0004]

According to the first aspect of the present invention, there is provided an OPGW installed between two towers located in front and behind.
Is insulated and supported at an overhead ground wire support position on a steel tower, and only the exterior conductive portions of the OPGW supported in both directions are separated from each other, and their ends are respectively connected to one end of a primary winding of a wound type CT. By connecting the other end of the primary winding to the tower main body side with ground, electric power is taken out from the secondary winding of the winding type CT.

According to a second aspect of the present invention, in the first aspect, a winding type CT having an extraction tap in the middle of the primary winding is used, and both ends of the primary winding are connected to ends of an exterior conductive portion of the OPGW. At the same time, the drawer tap is grounded to the tower body side.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the OPGW is insulated and supported by one or more continuous steel towers located at both or one of the front and rear sides.

According to a fourth aspect of the present invention, in the overhead ground wire utilizing power supply device according to the first or second or third aspect, only the exterior conductive portions of the OPGW supported in both directions are cut off from each other, and the ends thereof are cut off. Each is connected to the primary terminal of the winding type CT to insulate and support the OPGW.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a configuration and a usage example of a first embodiment according to the present invention, and FIG. 2 is a diagram showing a steel tower on which the power supply device of FIG. 1 is installed. In this embodiment, as shown in FIG.
L, which are insulated and supported by the uppermost left and right ends A and B of the tower 1, and whose ends are installed at the same position or near the center of the tower 1. It is drawn to a few. Note that OPGW1L,
The 2L tower fixing portion performs insulation processing until the OPGWs 1L and 2L are drawn into the OPGW insulating boxes 2 and 3.

In the insulating boxes 2 and 3, optical fibers are separated from the outer conductive portions at the two ends of the OPGWs 1L and 2L, respectively, and are fusion-spliced inside not shown. Further, as shown in FIG. 1, the outer conductive portions of the OPGWs 1L and 2L are connected to the primary windings of the winding types CT4 to CT7.
It is grounded on the tower. The secondary windings of the windings CT4 to CT7 are connected to the relay unit 8, and their outputs are rectified and combined, and then subjected to voltage control so that the output voltage is constant even with a change in the main flow. It is sent to the control unit 9. Here, in the basic system of the present power supply device, it is standard that the backup device unit 11 using a battery is not used. However, when the power required for the load cannot be supplied due to the shortage of the power flow on the main line, the control device unit 9 is provided. Backup device section 11
Can be added to compensate for the power shortage.

In the control unit 9, the DC power from the relay unit 8 is converted into AC power by an inverter and supplied to the medium-luminance aviation obstacle light 12, and the low luminous intensity is transmitted through the joint boxes 13 and 14. It is supplied to aviation obstacle lights 15-20. In addition, the control unit 9 performs flickering control of the aviation obstacle lights during the day and night and blinking control of the medium-luminance aviation obstacle lights. Furthermore, when the backup device unit 11 composed of a battery is used with a small main flow, the charging control (executed when the fault light is turned off during the day) and the discharge control (executed when the fault light is turned on at night) are performed, and the aviation obstacle light is performed. Supply stable power to

FIG. 3 is a diagram showing in detail a portion where the OPGW 1L of FIG. 1 is supported by the steel tower 1, in which the OPGW insulating box 2 is installed at the same position. As shown,
OPGW1L stretched in both directions of the steel tower 1 is supported by a tension device 23, respectively.
It is supported on a central tension plate 26 via a tension insulator 24 and a right angle clevis 25. The tension plate 26 is supported and fixed to the tower main body by a ground arm (not shown).

The OPGW 1L, which is free inside the tension device 23, is fixed to a supporting insulator 27 which is vertically provided on the lower surface of the tension plate 26. An OPGW is mounted on the upper surface of the tension plate 26 via a mounting bracket 28.
The insulation box 2 is fixed, and the OPGW insulation box 2
The end of OPGW1L is connected. Also, OPGW
The 1 L exterior conductive portion is branched by a clamp at the tip of the support insulator 27, and is connected to the winding type CT 4 or the like via an insulated wire 29.

FIG. 4 is a view showing a supporting portion of the OPGW 1L in the towers located before and after the tower 1. In this embodiment, in order to increase the effective span length and increase the electromotive force of the wire-wound CTs 4 to 7 installed in the tower 1, the tower 1
The OPGWs 1L and 2L are supported without being grounded by one or more continuous steel towers located at both or one of the front and rear sides. That is, as shown in FIG. 4, the OPGW 1L stretched in both directions of the steel tower 1 is supported by a tension device 23, and the tension device 23 further includes a tension insulator 24,
It is supported by a central tension plate 26 via a right angle clevis 25.

The tension plate 26 is supported and fixed to the tower main body by a ground arm (not shown). OPGW1 which became free inside of the clamp 23
L is fixed to support insulators 31 erected on the upper surface of the tension plate 26, respectively. Thereby, OPGW1L
Is a so-called plain support for the steel tower. Further, in order to prevent flashover at the edge surface of the support insulator 31 when a lightning strike current flows through the tower or OPGW1L and the potential rises, the support insulator 31 is provided with a protective ball gap 32.

When the optical fiber cable is to be branched even when the OPGW is supported on a steel tower without being grounded without grounding, the OPGW 1L is divided and the OPGW insulating box 2 is installed as shown in FIG. And O
The PGW 1L is connected, and the branching of the optical fiber is terminated therein. At this time, the outer conductive portion of the OPGW 1L is branched by a clamp at the tip of the support insulator 27 on the tightening plate 26 and connected to each other.

FIG. 5 is a sectional view of the OPGW insulating box 2 shown in FIG.
FIG. 3 is a diagram in which a steel tower 3 is installed near the center at the top of the tower 1. O
PGW1L, 2L tower fixing part is OPGW1L, 2L
Insulator 2 until it is pulled into OPGW insulation boxes 2 and 3
At 2 and 27, insulation and fixing are performed. OPGW1L, 2
L is an extra turn 30 near the center of the tower as shown in the figure.
To form The OPGW insulating boxes 2 and 3 are fixed to a steel tower via a mounting bracket 28.
3 are connected to ends of OPGWs 1L and 2L, respectively. Further, the outer conductive parts of the OPGWs 1L and 2L are branched by a clamp at the tip of the support insulator 27, and the insulated electric wires 29 are formed.
Are connected to the windings CT4 to CT7.

FIG. 6 is a diagram showing a connection state inside the OPGW insulating box 2 of FIG. A pair of insulating insulators 36 is attached through the lower surface of the metal case 35 outside the insulating box 2, and two OPGWs are attached to the insulator 36 from below.
1L are respectively inserted, and the outer conductive portion of the
By 7, it is fixed to the metal case 35. The clamp 37 and the metal case 35 are insulated by an insulator 38. Also, an OPGW is provided above the clamp 37.
The 1 L outer conductive portion is removed and the optical fiber cable 39 is removed.
Is exposed and further fixed to the cable fastening portion 40 before being introduced into the metal case 41.

In the metal case 41, the core wire 42 of the optical fiber cable 39 is further exposed, and is fused and connected to each other at a connecting portion 43. A ball gap 4 is provided between the OPGW clamp 44 and the metal case 41 between the OPGW clamp 44 and the metal case 41 in order to prevent flashover when the potential rises during a lightning strike.
5 are provided.

In FIG. 6, only the exterior conductive portion of the OPGW 1L is connected inside the OPGW insulating box 2 and the core wire 42 of the optical fiber cable 39 is fused and connected to each other at the connection portion 43 in the metal case 41. By replacing the OPGW junction box with the OPGW, one or more continuous towers located in front of and / or behind the tower 1 can be used.
1 can be supported without being grounded, and the apparent span can be increased to increase the electromotive force of the wire-wound CTs 4 to 7 installed in the steel tower 1.

FIG. 7 is a circuit diagram showing a second embodiment. In the first embodiment described above, as shown in FIG.
The wire-wound CTs 4 and 5 and the wire-wound CTs 6 and 7 are connected to both sides of the GWs 1L and 2L, respectively.
Can be halved. That is, as shown in FIG.
Is connected to OPGW1L.

Similarly, a winding type CT 52 having an extraction tap 58 in the middle of the primary winding 54 is connected to the OPGW 2 L, both extraction taps 57 and 58 are connected to a ground wire 59, and furthermore, both of the CT 51 and 52 are connected. Secondary windings 55, 56
Are connected to the relay control device 8. In this embodiment, since the number of installations of the winding type CT is halved,
Less work on the tower.

FIG. 8 is a sectional view showing the OPGW insulating box 2 shown in FIG.
3 without using the wire type CT4-7 installed on the tower 1
It is a figure showing a support portion of OPGW1L in a steel tower that connects. OPGW1L installed in both directions of the tower 1
Are supported by a tension device 23, and the tension device 23 is supported by a central tension plate 26 via a tension insulator 24 and a right-angle clevis 25. The tension plate 26 is supported and fixed to the tower main body by a ground arm (not shown).

The OPGW 1L, which is free inside the retaining crumb 23, is fixed to a supporting insulator 31 erected on the upper surface of the tension plate 26, respectively. And
The exterior conductive portion of the OPGW 1L is removed between the support insulators 31, is branched by a clamp at the tip of the support insulator 31, and is connected to the winding type CT4 or the like via the insulated wire 29. In this way, the OPGW having a small extra length by this method
Can be easily connected to any steel tower without cutting and connecting the optical fiber cable.
Can be installed.

[0024]

As described above, according to the present invention, the outer conductive portion of the OPGW erected in both directions of the tower is insulated and supported, separated, and its end is connected to one end of the primary winding of the wound CT. Since the other end of the primary winding is grounded to the tower body side, the induced current generated in the exterior conductive portion of the OPGW can be efficiently extracted as electric power. Further, if the winding type CT is of a type having an extraction tap in the primary winding, the number of CTs to be installed can be halved by grounding the extraction tap and connecting both ends to the exterior conductive portion. . Further, one or more continuous towers located before and / or after the tower, OPGW
, The effective span length can be increased and the power obtained from the overhead ground wire can be increased.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a first embodiment according to the present invention and an example of a power supply destination;

FIG. 2 is a diagram illustrating an installation position of the power supply device of FIG. 1;

FIG. 3 is a diagram showing in detail a portion where the OPGW insulating box of FIG. 1 is supported at the upper left and right ends of a steel tower.

FIG. 4 is a diagram showing supporting portions of the tower before and after the tower on which the power supply device of FIG. 1 is installed.

FIG. 5 is a diagram showing a portion where the OPGW insulating box of FIG. 1 is supported at a position near the center of the top of the tower.

FIG. 6 is a diagram showing a connection state inside the OPGW insulating box of FIG. 3;

FIG. 7 is a circuit diagram showing a second embodiment according to the present invention.

FIG. 8 is a diagram showing a portion where an OPGW is supported by a steel tower on which a power supply device is installed.

[Explanation of symbols]

 1L, 2L OPGW 1 Steel tower 2, 3 OPGW insulating box 4-7 Winding CT 8 Relay device section 22 Support insulator 23 Tension device 24 Tension insulator 25 Right angle clevis 26 Tightening plate 27 Support insulator 28 Mounting bracket 29 Insulated wire 30 OPGW extra length 31 support insulator 32 ball gap 35 metal case 36 insulator insulator 37 clamp 38 insulator 39 optical fiber cable 44 OPGW clamp 45 ball gap 51,52 wound CT 53,54 primary winding 55,56 two Secondary winding 57,58 Extraction tap 59 Ground wire

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Seiji Takano 1-7-1, Yurakucho, Chiyoda-ku, Tokyo Toko Electric Co., Ltd. (72) Inventor Osamu Naganuma 1-7-1, Yurakucho, Chiyoda-ku, Tokyo East F-term (reference) 5G066 AA20

Claims (4)

[Claims] 1. An insulated OPGW installed between two towers located in front and rear thereof at an overhead ground wire support position on the tower, and only the exterior conductive portions of the OPGW supported in both directions are separated from each other. By connecting the ends to one end of the primary winding of the wound CT and connecting the other end of the primary winding to the tower body side, power can be extracted from the secondary winding of the wound CT. Power supply device using overhead ground wire. 2. An overhead ground wire utilizing power supply device according to claim 1, wherein the winding type C has an extraction tap in the middle of the primary winding.
An overhead ground wire power supply device, wherein T is used to connect both ends of a primary winding to ends of an exterior conductive portion of an OPGW, and a tap is connected to the steel tower body side with a ground. 3. The overhead ground wire power supply device according to claim 1, wherein the OPGW is insulated and supported by one or more continuous steel towers located at both front and rear sides or at one side. Line power supply. 4. The method according to claim 1, 2 or 3.
In the above-mentioned power supply device utilizing an overhead ground wire, only the exterior conductive portions of the OPGW supported in both directions are separated from each other, and their ends are respectively connected to the primary terminals of the coiled CT.
A power supply device utilizing an overhead ground wire, wherein the power supply device is insulated.