TW201445583A - Lightning arrester attaching structure in tension insulator assembly - Google Patents

Abstract

The present invention relates to a lightning arrester attaching structure for a attaching a lightning arrester to multiple tension insulator strings, wherein the lightning arresters 6a and 6b are divided into the ground side and the charged side so as to have almost the same mass, and attached to different tension insulator strings 2 in a balanced manner. This arrangement can suppress torsion of the tension insulator device 1. Further, the lightning arresters 6a and 6b each having a mass nearly half the weight of a conventional lightning arrester are installed at both ends of the tension insulator strings 2, so that the load stress onto the attachment metal fittings 5a and 5b is reduced. This allows for reduced risk of damages to the attachment metal fittings 5a and 5b.

Description

Mounting structure of lightning protection device on tension resistant insulator device

The present invention relates to a mounting structure of a lightning protection device on a plurality of string tension resistant insulator devices.

Since the past, in order to protect the tension-resistant insulator string when the transmission line is struck by lightning, the angular arrester is placed at both ends of the tension-resistant insulator string. Further, in recent years, a technique has been known in which a lightning protection device having a built-in zinc oxide element is attached to a tension-resistant insulator string to cause a lightning surge current to flow to the iron tower, thereby suppressing damage of the tension-resistant insulator string.

Since the zinc oxide element has nonlinear current-voltage characteristics, it has the following characteristics, and functions as an insulator for the operating voltage of the power system, but acts as a conductor when a high voltage caused by a lightning surge occurs in the system. The high voltage escapes to the ground side and interrupts the continuous current.

Patent Document 1 describes an example in which such a lightning protection device is attached to a two-string tension insulator device. As shown in Patent Document 1, a series of tension-resistant insulator devices having yokes are provided on the ground side and the power-receiving side, and a lightning protection device or an electrode can be provided in the center of the yoke. However, in the case of worrying about avoiding the load being concentrated at one point or preventing the remaining insulator string from being damaged when the insulator string is broken, In some cases, a two-string tension insulator device that does not have a yoke is formed. In this case, if the lightning protection device or the electrode is placed on one side of the insulator string, the weight is out of balance, and the two-string tension insulator device may be distorted. Further, a special load due to the twist acts on the mount, which is not preferable because of the strength or durability.

Further, Patent Document 2 describes that the lightning protection device is mounted on three strings. An example of a tension insulator device. In this case, the lightning protection device is also disposed on the center line of the three-string tension-resistant insulator device to achieve weight balance. However, since the three-string tension insulator device uses a special three-string yoke that is overlapped by two strings of yokes, a special mounting member or counterweight is required in order to arrange the lightning protection device on the center line of the three-string tension insulator device. However, the cost becomes higher, or the weight of the insulator device increases the weight of the weight.

Further, in Patent Documents 1 and 2, the lightning protection device is disposed in the tensile sheet. The ground side of the force insulator string is disposed on the power-receiving side, but depending on the quality of the lightning protection device itself, the reduction in strength and durability of the ground-side mounting member caused by the load may become a problem.

[Prior patent documents]

[Patent Literature]

[Patent Document 1] JP-A-2003-217790

[Patent Document 2] JP-A-2011-065928

SUMMARY OF THE INVENTION An object of the present invention is to provide a mounting structure of a lightning protection device on a tension-resistant insulator device, which solves the above-mentioned conventional problems and can suppress the increase in weight of the insulator device or the reduction in strength and durability of the mounting member. The lightning protection device is mounted to the plurality of string tension insulator devices in a manner that does not cause distortion.

In order to solve the problem, the mounting structure of the lightning protection device on the tension-resistant insulator device of the present invention is a mounting structure of a lightning protection device for a plurality of strings of tension-resistant insulator strings, characterized in that the lightning protection device is divided into a grounding side and a power-receiving side. And balanced installation on a different tension-resistant insulator string.

Further, as shown in the second item of the patent application, the lightning protection device is preferably divided into a ground portion having substantially the same quality as the power receiving side.

According to the present invention, in a tension-resistant insulator device having a plurality of strings of tension-resistant insulator strings, since the lightning protection device is divided into a ground side and a power-receiving side, and balancedly mounted on the different tension-resistant insulator strings, the tension resistance can be suppressed. Distortion of the insulator device. Therefore, it can also be mounted on a two-string tension insulator device that does not exist in the yoke. Moreover, in the three-string tension insulator device, it is not necessary to provide the lightning protection device on the central axis of the tension-resistant insulator device, and it is not necessary to install a special lightning protection device mounting member and a weight.

Further, by dividing the lightning protection device into the ground side and the power receiving side, the quality of each lightning protection device can be made about half of the conventional one without impairing the protection function of the conventional tension resistant insulator string. Thereby, the load stress on the mounting member is alleviated, and the risk of damage to the mounting member can be reduced. Moreover, since the surface area of the lightning protection device is also about half, the influence of snow, gusts, and the like can be reduced, and the risk of damage to the mounting member can be reduced in the same manner. Furthermore, since the mass of each lightning protection device is about half, the load is reduced, and the conventional transmission system is difficult. It is feasible to transport lightning protection devices such as mountains.

1‧‧‧Tension-resistant insulator device

2‧‧‧Tensile insulator string

3 (3a, 3b) ‧ ‧ fixed parts

4 (4a, 4b) ‧‧‧ angular arrester

5(5a, 5b)‧‧‧Installation

6 (6a, 6b) ‧‧‧ lightning protection device

7 (7a, 7b) ‧ ‧ ‧ lightning protection device body

8‧‧‧ Adapter

9 (9a, 9b) ‧ ‧ discharge electrode

10‧‧‧ air gap

Fig. 1 is a plan view showing an embodiment of the present invention.

Fig. 2 is a front elevational view showing an embodiment of the present invention.

Fig. 3 is a plan view showing the case where the lightning protection device is attached to the same tension-resistant insulator string.

Fig. 4 is a front elevational view showing the lightning protection device mounted on the same tension-resistant insulator string.

Hereinafter, preferred embodiments of the present invention are shown. This embodiment shows a mounting structure of a lightning protection device for a two-string tension insulator device that does not have a yoke on the ground side. As shown in Fig. 1 and Fig. 2, the end portions of the respective tension-resistant insulator strings 2 on the ground side are connected to the arms of the tower (not shown) by the fixing members 3a, and the ends of the power receiving sides are respectively associated with the yokes 3b. Connected at both ends. The front ends of the both end portions of the yoke 3b are attached to the power transmission line via a fixing member (not shown).

Angle arresters 4a and 4b are provided on the ground side of each tension-resistant insulator string 2 and the end on the power-receiving side as in the prior art. As shown in the figure, the lightning protection device 6 is divided into a ground side and a power receiving side, and is attached to the different tension resistant insulator string 2. The lightning protection device 6a on the ground side is attached to the tension resistant insulator string 2 on the lower side in Fig. 1, and the lightning protection device 6b on the power receiving side is attached to the tension resistant insulator string 2 on the upper side in Fig. 1 .

The lightning protection device 6a on the ground side is constructed by the lightning protection device body 7a, the adapter 8, and the discharge electrode 9a that is detachably attached to the front end of the adapter 8. And installed at the front end of the mounting member 5a connected to the fixing member 3a. Moreover, the lightning protection device 6b on the power-receiving side is attached to the front end of the mounting member 5b by the lightning protection device main body 7b and the discharge electrode 9b.

Each of the lightning protection device bodies 7a and 7b has a plurality of zinc oxide elements arranged in series in the outer layer. As described above, since the zinc oxide element has a nonlinear current-voltage characteristic, it functions as an insulator at the operating voltage of the power system, but acts as a conductor when a high voltage such as a lightning surge occurs in the system.

The air gap 10 is formed on the discharge electrodes 9a, 9b. In the case of lightning strike to the power line, the lightning surge current flows in the order of the lightning protection device 6b on the power-on side, the air gap 10, and the lightning protection device 6a on the ground side, and the tension-resistant insulator string 2 can be protected.

In the present embodiment, as shown in Fig. 1, the lightning protection devices 6a and 6b are divided into a ground side and a power receiving side, and are disposed in a balanced manner in the different tension-resistant insulator strings 2 to reduce the influence of distortion. In the present embodiment, the lightning protection devices 6a and 6b are equally divided into equal masses, but they are not necessarily strictly halved, and may be distributed in consideration of the quality of the mount or the discharge electrodes 9a and 9b.

In order to verify the effect of the present invention, 250U-shaped hook × 20 × 2 string tension-resistant insulator devices (insulator devices arranged in parallel with 20 strings of insulator strings of 20 U-shaped hook-type suspension insulators with a diameter of 250 mm), as shown in Figure 1, As shown in Fig. 2, the lightning protection devices 6a and 6b are divided into a grounding side and a power receiving side, and are arranged in a balanced manner in the different tension-resistant insulator strings 2 (different tension-resistant insulator strings), and as in the third As shown in Fig. 4, the lightning protection devices 6a and 6b are divided into a grounding side and a power receiving side, and are disposed in one tension-resistant insulator string 2 (the same tension-resistant insulator string), and the grounding is measured by a tilt angle meter. The tilt angle of the device on the side and the power-on side. 3 and 4 are the same as the tension-resistant insulator device 1 of Figs. 1 and 2, except that the arrangement of the lightning protection devices 6a and 6b is different, and the specifications, shapes, and functions of the other devices are the same. The wire tension system simulates the actual installation conditions, and adopts two modes of 700 kg (6860 N) and 1500 kg (14700 N) respectively. Moreover, the vibration condition of the wire is two modes of vibration in the longitudinal direction 100 times and lateral vibration 100 times. Conduct a comparative review. Measured immediately after the end of the vibration. In addition, the vibrations in the longitudinal and lateral directions are by manpower. The first table shows the inclination angles of the respective lightning protection devices 6a and 6b in this mode.

As shown in the first table, the numerical values when the vibration is applied 100 times in the longitudinal direction and the lateral direction are compared, and the lightning protection devices 6a and 6b are divided into a ground side and a power receiving side, and are arranged in a balanced manner in the different tension resistant insulator strings 2 As compared with the case where the lightning protection devices 6a and 6b are disposed in the same tension-resistant insulator string 2, it is confirmed that the inclination angle of the power-receiving side is small, and as a result, the influence of the distortion can be reduced.

In this manner, according to the present invention, the lightning protection device is divided into a grounding side and a power receiving side, and is balancedly mounted on the different tension-resistant insulator strings. As shown in the present embodiment, the lightning protection devices 6a and 6b may be attached to the tension-resistant insulator string 2 when the yoke of the two-string tension insulator device 1 is not present. Further, in the three-string tension insulator device, it is not necessary to provide the lightning protection devices 6a and 6b on the central axis of the tension-resistant insulator device, and the mounting member and the weight of the special lightning protection device are not required.

Further, according to the present invention, the masses of the lightning protection devices 6a and 6b provided on the ground side and the power receiving side are substantially the same, and each mass can be made approximately half of the conventional lightning protection device. In this manner, by setting the mass of each of the lightning protection devices to about half and providing them at both ends of the tension resistant insulator device 1, the load stress on the mounts 5a and 5b is reduced. Thereby, the risk of damage to the mounting members 5a, 5b can be reduced. Further, since the surface area of the lightning protection devices 6a and 6b is also about half, the influence of snow, gusts, and the like can be reduced, and the risk of damage to the mounts 5a and 5b can be reduced in the same manner. Further, since the mass of each of the lightning protection devices 6a and 6b is about half, the transportation load is reduced, and the conventional transmission system is difficult to transport the lightning protection device such as a mountain.

1‧‧‧Tension-resistant insulator device

2‧‧‧Tensile insulator string

3a, 3b‧‧‧Fixed parts

4a, 4b‧‧‧ angular arrester

7a, 7b‧‧‧ lightning protection device body

9a, 9b‧‧‧discharge electrode

Claims (2)

A mounting structure of a lightning protection device on a tension-resistant insulator device, which is a mounting structure of a lightning protection device for a plurality of strings of tension-resistant insulator strings, characterized in that: the lightning protection device is divided into a grounding side and a power-receiving side, and is installed in a balanced manner Different tensile strength insulator strings. A mounting structure of a lightning protection device on a tension-resistant insulator device according to claim 1, wherein the lightning protection device is divided into a grounded side and a power receiving side having substantially the same mass.