JP3197941B2 - Transmission line tower radio equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio apparatus installed on an overhead power transmission tower.

[0002]

2. Description of the Related Art In order to prevent accidents of overhead power transmission lines from social demands such as modernization of maintenance work of overhead power transmission lines and securing reliability, current sensors are installed on the main line of high-voltage overhead power transmission lines during operation. Installed, the data is transmitted by a wireless transmitter attached to the main line of the transmission line, this radio wave is received by the wireless antenna installed on the ground potential side, and the device that obtains the high-voltage part current data by the wireless receiver is applied Have been.

[0003] This radio device usually uses a weak radio wave having a very small radio wave output, so that the radio wave can reach only a short distance. It is necessary to attach it to a nearby ground potential side. Therefore, the installation location of the wireless antenna is optimal at the tip of the tower arm, which is the location closest to the main line of the transmission line.

On the other hand, a conventional radio antenna uses a metallic rod having a length dimension corresponding to the radio frequency of a transmission source. This rod-type radio antenna is connected to a tower closest to a high-voltage transmission line. The installation on the arm causes a problem in the electric withstand voltage between the high-voltage transmission line and the rod. Therefore, the conventional rod-type radio antenna has been installed in a tower far from the tower arm, which is a place where there is no problem in terms of electrical insulation.

[0005]

However, when a rod-type radio antenna is installed in a steel tower for the purpose of electrical insulation, the distance between the radio antenna and the radio wave source is large, and radio waves reaching the radio antenna are extremely weak. Radio waves. For this reason,
Instability, such as interruption of radio waves, makes it difficult to receive accurate radio waves. As a result, there has been a problem in that wireless data from the main line of the transmission line cannot be obtained.

As a solution to this problem, a method of increasing the number of receiving elements of the radio antenna to improve the radio wave reception sensitivity of the radio antenna can be considered. Increase
There are inconveniences such as hindering normal work on the tower,
There is a problem that the radio antenna becomes expensive in terms of cost.

An object of the present invention is to solve the above-mentioned disadvantages of the prior art, to be economically excellent, and to have no problem in electrical insulation.
An object of the present invention is to provide a wireless device that does not require any occupied space for installing a tower and that can stably receive a radio wave transmitted from a high-voltage transmission line.

[0008]

SUMMARY OF THE INVENTION Transmission line tower radio of the present invention
The equipment is equipped with a radio transmitter on the overhead transmission line, receives the radio wave with a radio antenna installed on the transmission line tower, and obtains the data of the transmission line using a radio receiver.
In a wire device, a part of a transmission line tower is insulated from other parts, and the member itself is used as a wireless antenna.

[0009]

[Function] Since a part of the transmission tower is used as a wireless antenna without adding a new metal body to the tower arm member structure, it is extremely economical, and a wireless antenna is provided at a position close to the high voltage part. Even if an antenna is constructed, there is no problem in terms of electrical insulation. Further, compared to a case where a wireless antenna is arranged in a steel tower, the distance from a radio wave transmission source is shorter, and stable radio waves can always be received. Furthermore, since it does not occupy a special antenna installation space at all, there is no hindrance to normal work of the tower.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments.

FIG. 1 shows power transmission using the wireless antenna of the present invention.
1 shows an embodiment of a wire tower radio apparatus. In FIG. 1, a radio transmitter 1 and a sensor 1 a are installed on a high-voltage transmission line 5 near a tower 6. The wireless transmitter 1 converts current phase data of the high-voltage transmission line 5 measured by the current transformer sensor 1a into radio waves and transmits the radio waves. The data transmitted from the sensor 1a is an absolute current phase difference calculated from the magnitude of the charging current to the ground based on the voltage to the ground.

Of the tower arms 7 provided above and below the tower 6, the tower arm 7 closest to the radio transmitter 1 is provided with the radio antenna 2 and the radio receiver 4 for obtaining data from received radio waves. Both are coaxial cables 3 for radio signal transmission
Connected by However, the wireless antenna 2 is the arm member itself of the tower arm 7 near the wireless transmitter 1.

FIG. 2 shows a tower arm 7 close to the radio transmitter 1, which shows upper and lower horizontal frames 8, 9 projecting in a wedge shape from each other, and a plurality of diagonal members 10 bridging therebetween.
They have a configuration in which angle iron (L steel) is connected by bolts 11. The radio antenna 2 insulates one of the diagonal members 10 of the tower arm 7, in this case, the diagonal member 10 near the distal end, which is close to the radio wave transmitter 1 and substantially vertical, with an insulating member. Is a wireless antenna.

That is, as shown in FIG. 3 and FIG.
In addition, the insulating member 12 is fitted to the bolts 11 connecting the upper and lower horizontal frames 8, 2 at both ends of the diagonal member 10.
An insulation member 13 is inserted between the steel tower 9 and bolts to insulate it from the other tower diagonal members 10. Insulating members 12, 13
Is an insulating collar made of a material such as fluororesin which is thermally strong and has excellent weather resistance.

The radio antenna 2 can be obtained by connecting the coaxial cable 3 for signal transmission to the insulated diagonal member 10 in this manner.

According to the above configuration, the radio antenna 2 can be constructed without adding a new metal body to the tower arm member structure originally designed to be electrically insulated. Even if a wireless antenna is arranged, there is no problem in terms of electrical insulation. Therefore, the distance from the radio wave transmission source is short, and stable radio waves can be always received.

With such a radio antenna, no space for installing a radio antenna is required. In addition, the mechanical strength of the steel tower does not impair its original strength because there is no change in the material or the structure of the member.

In addition, since a radio antenna can be constructed only by inserting an insulating collar into a steel tower member, the radio antenna is extremely economical, has a very simple mounting operation, and is reliable.

In the above embodiment, a part of the arm member of the tower arm closest to the radio transmitter attached to the high-voltage transmission line is insulated by an insulating collar or the like, and the insulated member itself is used as a radio antenna. However, the tower member used as the wireless antenna is not limited to the tower arm, and any member constituting the tower can be used as the wireless antenna by the same method.

[0020]

As described above, according to the present invention, the transmission
A radio antenna required for the electric wire tower radio apparatus can be obtained very simply and economically, and excellent effects such as stable reception of radio waves can be obtained.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a transmission line tower radio apparatus according to an embodiment of the present invention.

FIG. 2 is a side view of a tower arm partially having a wireless antenna.

FIG. 3 is an enlarged view of a portion A in FIG. 2;

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 wireless transmitter 2 wireless antenna 3 coaxial cable 4 wireless receiver 5 high-voltage transmission line 7 steel tower arm 8, 9 horizontal frame 10 diagonal material 11 bolt 12, 13 insulating member

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Koji Tamura 5-1-1 Hidaka-cho, Hitachi City, Ibaraki Prefecture Hidaka Works, Hitachi, Ltd. (58) Field surveyed (Int. Cl. ⁷ , DB (Name) G01R 31/08 H02H 7/26

Claims (1)

(57) [Claims] 1. A mounting a radio transmitter in the overhead transmission line wire, received by the wireless antenna installed the radio wave in the transmission line tower, transmission lines to obtain data of the electric wire by the wireless receiver
In tower wireless device, some of the members constituting the transmission lines tower insulated from other parts, power line towers radio apparatus characterized by that the member itself and a radio antenna.