JP2016189237A - Insulator set with lightning arrester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique capable of stably maintaining lightning characteristics by always retaining a discharge gap constant even when deflection or twist is generated in an insulator set formed by connecting a plurality of long rod insulators in series, due to external factors such as wire vibrations caused by wind pressure and galloping.SOLUTION: The insulator set with a lightning arrester is configured by connecting a plurality of long rod insulators 1 in series and includes a lightning arrester 2. An arrester element part 3 constituting the lightning arrester is divided into two, which are a ground side and a charged side, and mounted to caps of different long rod insulators. The long rod insulators to which the lightning arrester elements are mounted each includes the lightning arrester element part 3 at one end of the cap and an arc horn 4 at the other end of the cap in a manner of facing each other. Further, a serial gap is divided.SELECTED DRAWING: Figure 1

Description

  The present invention is provided with a lightning arrester that, when a high voltage due to a lightning surge is applied to a transmission line, discharges it to the ground promptly, interrupts the subsequent current flow, and prevents the occurrence of a ground fault or short circuit accident. The present invention also relates to a single-type insulator device.

  The existing lightning arrester is based on a system in which a lightning protection element part (zinc oxide element) is attached to a steel tower arm via a mounting bracket, and a series gap is formed with a discharge electrode provided on the insulator device charging side. (Patent Document 1).

  On the other hand, in recent years, there is an increasing demand for a compact lightning arrester that is lighter and more compact by reducing the diameter of the lightning protection element portion and reducing the overall length. The compact lightning arrester presupposes a structure that is installed in place of the arc horn of the existing insulator device.

  The lightning protection element portion becomes longer as the rated voltage increases. For this reason, when the system voltage to apply becomes high, sufficient mechanical strength cannot be expected in a lightning protection element portion that has been reduced in diameter by being made lighter and more compact. Since the gap type lightning arrester is separated from the line by a series gap, it does not receive a load from the conductor, but it is necessary to secure a bending strength of about 500 N in consideration of construction. Therefore, when a compact lightning arrester is applied to a system voltage higher than 77 kV, a system in which the lightning protection element is divided into a grounding side and a charging side and a series gap is formed between the two lightning protection elements is adopted. (Non-Patent Document 1).

  However, when the above-described method of forming a series gap between the two lightning protection element portions is employed in a insulator device in which a plurality of long insulators are connected in series, as shown in FIG. In the low tension area, the insulator device is bent or twisted due to external factors such as wire vibration due to wind pressure or galloping during snowfall, and the distance between the two lightning protection element parts, that is, the discharge gap (G) is There is a problem that it may fluctuate, and it may be difficult to stably maintain lightning protection characteristics.

JP 2003-217790 A

NGK Review No.59 “Development of Compact Lightning Arrester”

  The object of the present invention is to solve the above-mentioned problem, and even when a plurality of long insulators are connected in series due to external factors such as vibration of the electric wire due to wind pressure and galloping, bending or twisting occurs in the insulator device. It is an object of the present invention to provide a technique capable of stably maintaining lightning protection characteristics by constantly maintaining a discharge gap.

  The present invention made in order to solve the above-mentioned problem is a lightning protection device comprising a lightning arrester comprising a lightning arrester comprising a plurality of long insulators connected in series and comprising a lightning arrester. The element part is divided into two parts, the ground side and the charging side, and attached to different long insulator caps. The long insulator attached with the lightning protection element part has the above-mentioned lightning protection element part on one end of the cap. The end cap is provided with an arc horn facing each other, and the series gap is divided.

  The invention according to claim 2 is characterized in that in the insulator device with a lightning arrester according to claim 1, a plurality of long insulators are connected between caps at end portions by conductive links, According to a third aspect of the present invention, in the insulator device with a lightning arrester according to the first aspect, the lightning protection element parts divided into two parts are both mounted in the same plane including the axes of the plurality of long insulators. It is what.

  In an insulator with a lightning protection device, which is constructed by connecting a plurality of long insulators in series, and the lightning protection device is equipped with a lightning protection device, the lightning protection element part constituting the lightning protection device is divided into a ground side and a power application side. A long insulator attached to a cap of a different long insulator and having a lightning protection element attached thereto is provided with the lightning protection element part on one end of the cap and an arc horn on the other end of the cap. According to the present invention that employs a configuration in which a plurality of long insulators are connected in series due to external factors such as wire vibration due to wind pressure or galloping, the insulator device is bent or twisted. However, since the lightning protection element portion and the arc horn follow the behavior of the fixed long insulator, the discharge gap formed between the lightning protection element portion and the arc horn does not change. For this reason, according to the present invention, the discharge gap can be kept constant and the lightning protection characteristics can be stably maintained.

It is a front view of the insulator apparatus with a lightning arrester which shows one Embodiment of this invention. It is a front view of the insulator apparatus with a lightning arrester in other embodiment. It is a front view of the insulator apparatus with a lightning arrester in other embodiment. It is a front view of the state which the insulator apparatus with a lightning arrester of FIG. 1 bent. It is the front view and side view of a mounting bracket. It is explanatory drawing of a prior art.

  Preferred embodiments of the present invention are shown below.

  As shown in FIG. 1, the insulator device with a lightning arrester according to this embodiment is a power transmission insulator device configured by connecting a plurality of long insulators 1 in series, and includes a lightning arrester 2. The long insulator 1 has a structure in which a metal cap is fixed with cement to both ends of a porcelain insulator body having a large number of shades. The plurality of long insulators 1 are connected by caps 11 and conductive links 10 between end caps. Reference numeral 12 denotes a ground side link, and the tip thereof is fixed to a steel tower arm (not shown). Reference numeral 13 denotes an electric power transmission side link, and a power transmission line is supported by a clamp fitting (not shown) at the tip of the link. Depending on the state of the overhead wire, the link 13 may be reversed on the ground side, and the link 12 may be reversed on the power application side.

  The lightning protection element portion 3 is divided into two parts, that is, a ground side 3A and a power application side 3B. In this embodiment, the “grounding side lightning protection element portion 3A” is fixedly attached to the “grounding side cap 5A” of the “grounding side long insulator 1A”, and the “electricity charging side lightning protection element portion 3B” is attached to the “grounding side lightning protection element portion 3B”. It is fixedly attached to the “grounding-side cap 5B” of the charging-side long insulator 1B. The mounting is performed by a mounting bracket 15 shown in FIG. The mounting bracket 15 includes a base side metal fitting 16 and a tip side metal fitting 17, and has a structure in which the lower end of the base side metal fitting 16 is divided into a semicircular shape and is bolted to the cap 5 of the long insulator 1. Further, the base metal fitting 14 of the lightning protection element portion 3 is bolted to the distal end side metal fitting 17. An angle adjusting mechanism 18 is provided between the base side metal fitting 16 and the tip side metal fitting 17 so that the attachment angle of the lightning protection element portion 3 can be adjusted.

  Further, the “grounding side arc horn 4A” is fixedly attached to the “powering side cap 6A” of the “grounding side long insulator 1A”, and the “powering side arc horn 4B” is attached to the “powering side arc horn 4A”. Is fixedly attached to the “cap 6B on the charging side” of the long trunk insulator 1B ”.

  The arc horns 4A and 4B are arranged so that the gap electrodes 8A and 8B at the tips thereof face the gap electrodes 9A and 9B at the tips of the lightning protection element portions 3A and 3B, and the gap electrodes 8A and 8B and the gap electrodes 9A and 9B are arranged. The discharge gap (G) formed therebetween is divided. Therefore, the two divided gaps are electrically connected in series via the cap 5B, the conductive link 10, and the cap 6A in the middle of them, and form a discharge gap suitable for the voltage class as a whole. .

  In the present invention, the lightning protection element portions 3A, 3B and the arc horns 4A, 4B are directly attached to the caps 5A, 5B, 6A, 6B at both ends of the long insulator 1 as shown in FIG. In addition, even when a plurality of long insulators are connected in series and the device is bent or twisted, the lightning protection element 3 and the arc horn 7 each behave in the manner of the fixed long insulator 1. Therefore, the discharge gap (G) is always kept constant, and the lightning protection characteristics can be stably maintained.

  As shown in FIG. 1, in this embodiment, a plurality of long insulators 1, 1 and lightning protection element portions 3A, 3B are mounted in the same plane including the plurality of long insulators 1, 1 axis. . In particular, it is preferable to install the lightning protection element portions 3A and 3B so that the lightning protection element portions 3A and 3B are positioned so as to be positioned directly above or below the long axis 1 and 1 axis. In addition, when the plurality of long insulators 1, 1 and the lightning protection element portions 3A, 3B are not arranged in the same plane including the axis, the long stems differ from each other by the weight of the lightning protection element portions 3A, 3B. A rotational moment in the direction may act, causing twisting, which is not preferable.

  As another embodiment, as shown in FIG. 2, the “grounding side lightning protection element 3A” is fixedly attached to the “cap 6A”, and the “grounding side arc horn 4A” is fixed to the “cap 5A”. At the same time, the “lightning protection lightning element 3B” is fixedly attached to the “cap 6B”, and the “electricity-side arc horn 4B” is fixedly attached to the “cap 5B”, as shown in FIG. The “grounding side lightning protection element portion 3A” is fixedly attached to the “cap 6A”, the “grounding side arc horn 4A” is fixedly attached to the “cap 5A”, It is also possible to fix and attach “3B” to “cap 5B” and to fix “arc horn 4B on the charging side” to “cap 6B”.

  When a lightning surge is applied to the transmission line supported by the insulator device with a lightning arrester having the above-described configuration, the surge current is a gap that is connected to the “electricity-side cap 6B” of the “electricity-side long insulator 1B”. From the electrode to the gap electrode connected to the “grounding side cap 5B” by the flashover, and subsequently, from the gap electrode connected to the “electricity-side cap 6A” of the “grounding side long insulator 1A”, the flashover Thus, the current flows through the gap electrode connected to the “grounding-side cap 5A”, reaches the tower main body through the mounting adapter and the supporting arm from the “grounding-side cap 5A”, and is grounded. For this reason, the insulator series can be protected from lightning surge. Moreover, since the wake after grounding the lightning surge is a commercial frequency, it is interrupted within half a cycle, and it is possible to prevent a power failure and damage to the transmission line due to the wake.

  As described above, according to the present invention, the discharge gap is always kept constant even when a lightning device with a lightning arrester in which a plurality of long insulators are connected in series is bent or twisted. The lightning protection characteristics can be stably maintained, and it is particularly suitable for a low tension part such as a substation lead-in part.

1 Long insulator (grounding side 1A, charging side 1B)
2 Lightning arrester 3 Lightning arrester element (grounding side 3A, charging side 3B)
4 Arc horn (grounding side 4A, charging side 4B)
5 Grounding cap (1A cap 5A, 1B cap 5B)
6 Power-cap (1A cap 6A, 1B cap 6B)
8 Gap electrode (4A gap electrode 8A, 4B gap electrode 8B)
9 Gap electrode (gap electrode 9A of 3A, gap electrode 9B of 3B)
DESCRIPTION OF SYMBOLS 10 Link 11 Bolt 12 Grounding side link 13 Power supply side link 14 Base metal fitting 15 Mounting metal fitting 16 Base side metal fitting 17 Tip side metal fitting 18 Angle adjustment mechanism

Claims (3)

It is a insulator device with a lightning arrester comprising a plurality of long insulators connected in series, and equipped with a lightning arrester,
The lightning protection element part constituting the lightning protection device is divided into two parts, the ground side and the power application side, and attached to different long insulator caps,
The long insulator attached with the lightning protection element is equipped with the above lightning protection element on the cap on one end, and the arc horn on the cap on the other end,
An insulator with a lightning arrester, characterized by dividing the series gap.   The insulator device with a lightning arrester according to claim 1, wherein a plurality of long insulators are connected between caps at their ends by conductive links.   The insulator device with a lightning arrester according to claim 1, wherein the lightning protection element parts divided into two are both mounted in the same plane including the axes of the plurality of long insulators.