CN205810490U - The voltage-sharing protective device of a kind of extra-high voltage combined insulator and insulator chain - Google Patents

Abstract

A voltage equalizing protection device for UHV composite insulators and an insulator string, including more than one insulator, a first arc angle and a second arc angle are placed between the insulators, the first arc angle is placed on the upper horizontal plate, and the second arc angle is placed between the insulators. The two arc angles are placed on the lower horizontal plate, and the upper horizontal plate and the lower horizontal plate are parallel to each other. The total length of the first arcing angle and the second arcing angle is less than the length of the insulator used for assembly. The utility model can protect the insulators from being damaged when a lightning strike occurs, improves the service life of the insulator strings, facilitates the normal operation of the insulator strings, and effectively reduces the maintenance work for protecting the insulator strings. The trial of the utility model in the power line shows that it can make the power line more stable without causing long-term disconnection and is easy to maintain; it can reduce the lightning strike accident rate of the line, can not patrol the line, greatly reduces labor intensity, and improves the economy of the power system benefit.

Description

A voltage equalizing protection device for UHV composite insulators and insulator strings

technical field

The utility model relates to a voltage equalizing protection device for an ultra-high voltage composite insulator used in a power system and an insulator string made by using the voltage equalizing protection device for an ultra-high voltage composite insulator.

Background technique

Faults in power systems caused by lightning strikes on transmission lines have become a common problem that plagues safe power supply. At present, the lightning protection measures for overhead lines adopted in my country mainly include erecting lightning conductors, reducing the grounding resistance of towers, strengthening insulation, adding coupling ground wires, and installing line arresters, etc. These traditional "blocking" lightning protection measures have become more and more important to the rapid development of my country's power grid in recent years, the stronger and stronger grid structure, and the widespread use of a large number of SF6 switches, computerized relay protection and reclosing devices. Conservative and one-sided. Under the premise of vigorously developing electric power now, UHV power transmission has become an inevitable trend, so the status of insulators becomes more and more important. Since there are usually thunder and lightning weather under natural conditions in the area where insulators are installed, it should be used during thunder and lightning. In weather, lightning will inevitably hit the UHV composite insulator, and the lightning strike will reduce the service life of the composite insulator string.

Contents of the invention

The purpose of this utility model is to overcome the above-mentioned deficiencies in the prior art and provide a voltage equalization protection device for UHV composite insulators, which can protect the insulators from damage when lightning strikes occur, improve the service life of the insulator strings, and facilitate the insulators The string operates normally, and at the same time, it can effectively reduce the maintenance work of the protective insulator string.

Another object of the present utility model is to provide an insulator string using the above-mentioned UHV composite insulator voltage equalization protection device.

The technical scheme of the utility model is: comprising the first arc angle and the second arc angle, the first arc angle is placed on the upper horizontal plate, and the second arc angle is placed on the lower transverse plate.

The first arc angle of the utility model is S-shaped, and the curved angle is upward, and the second arc angle is L-shaped.

The upper horizontal plate and the lower horizontal plate of the utility model are parallel to each other.

The total length of the first arcing angle and the second arcing angle of the utility model is smaller than the length of the insulator used for assembly.

The first arc angle and the second arc angle of the utility model are respectively placed between the insulators used for assembly.

The upper horizontal plate of the utility model is a rectangle, and the lower horizontal plate is a triangle.

An insulator string includes more than one insulator, and the above-mentioned voltage equalization protection device for UHV composite insulators is arranged between the insulators.

There are two insulators, and the positions are parallel to each other.

The utility model can protect the insulators from being damaged when a lightning strike occurs, improves the service life of the insulator strings, facilitates the normal operation of the insulator strings, and effectively reduces the maintenance work for protecting the insulator strings. The trial of the utility model in the power line shows that it can make the power line more stable without causing long-term disconnection and is easy to maintain; it can reduce the lightning strike accident rate of the line, can not patrol the line, greatly reduces labor intensity, and improves the economy of the power system benefit.

Description of drawings

Fig. 1 is a structural representation of the utility model.

Fig. 2 is a structural schematic diagram of the first arcing angle.

Fig. 3 is a schematic diagram of the structure of the second arc angle.

detailed description

As shown in Figure 1, it includes two insulators 2 parallel to each other. The two insulators 2 are mounted on a rectangular upper horizontal plate 1 and a triangular lower horizontal plate 4. The upper horizontal plate 1 and the lower horizontal plate 4 are parallel to each other. The upper horizontal plate 1 and the lower horizontal plate The lower transverse plate 4 forms an insulator string with the two insulators 2 to improve the insulation and mechanical properties of the insulators 2 . The first arcing angle 3 is placed on the rectangular upper horizontal plate 1, the second arcing angle 5 is placed on the triangular lower horizontal plate 4, the first arcing angle 3 and the second arcing angle 5 are placed between the two insulators 2 Between, the total length of the first arcing angle 3 and the second arcing angle 5 is less than the length of the insulator 2 . A certain discharge distance is reserved between the first arcing angle 3 and the second arcing angle 5, and on this basis, it also has the function of extinguishing the arc. When a lightning strike occurs, the first arcing angle 3 and the second arcing angle 5 discharge between the insulator strings to protect the insulators from damage, improve the service life of the insulator strings, and make the line more stable without causing long-term disconnection , good maintenance.

As shown in Fig. 2, the first arcing angle 3 is S-shaped, and the bending angle is upward.

As shown in Figure 3, the second arcing angle 5 is L-shaped.

Claims (8)

1. the voltage-sharing protective device of an extra-high voltage combined insulator, it is characterised in that: include the first arcing horn (3), the second trick Arc angle (5)；First arcing horn (3) is placed on upper cross plate (1), and the second arcing horn (5) is placed on lower cross plate (4).

The voltage-sharing protective device of a kind of extra-high voltage combined insulator the most according to claim 1, it is characterised in that: described One arcing horn (3) is S type, and upward, the second arcing horn (5) is L-type to bent angle.

The voltage-sharing protective device of a kind of extra-high voltage combined insulator the most according to claim 1, it is characterised in that: on described Transverse slat (1) is parallel to each other with lower cross plate (4).

The voltage-sharing protective device of a kind of extra-high voltage combined insulator the most according to claim 1, it is characterised in that: described The total length of one arcing horn (3) and the second arcing horn (5) is less than the length of the insulator assembling use with it.

The voltage-sharing protective device of a kind of extra-high voltage combined insulator the most according to claim 1, it is characterised in that: described One arcing horn (3), the second arcing horn (5) are respectively placed in and it assembles between the insulator of use.

The voltage-sharing protective device of a kind of extra-high voltage combined insulator the most according to claim 1, it is characterised in that: on described Transverse slat (1) is rectangle, and lower cross plate (4) is triangle.

7. an insulator chain, it is characterised in that: include more than one insulator (2), be equipped with right such as between insulator (2) and want Seek the voltage-sharing protective device of extra-high voltage combined insulator described in 1 to 6 any one.

A kind of insulator chain the most according to claim 7, it is characterised in that: described insulator (2) is 2, and position is mutual Parallel.