A lightning protection structure for AC power supply line

Abstract

The utility model provides an AC power supply line lightning protection structure, comprising a protective shell and an external lightning protection mechanism, wherein the outer surface of the protective shell is provided with the external lightning protection mechanism, and the inner surface of the protective shell is provided with the internal lightning protection mechanism. Through the arrangement of the external lightning protection mechanism and the internal lightning protection mechanism, the external lightning protection mechanism effectively guides lightning to ground through components such as lightning rods and grounding down conductors, thereby preventing lightning from directly hitting the power line; while the internal lightning protection mechanism monitors and processes overvoltage inside the power line through components such as overvoltage protectors and surge protectors, thereby protecting equipment from overvoltage damage. Various protection devices can quickly respond to the arrival of lightning or overvoltage, and quickly process them through methods such as fusing and conducting, thereby improving the response speed of the system to lightning. Through the arrangement of multiple internal and external protection measures, the safety and reliability of the power line are improved, and the risk of equipment damage or accidents caused by lightning is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field related to AC power supply lines, and in particular to a lightning protection structure for AC power supply lines. Background Art

[0002] The AC power supply line is a power transmission and distribution system that transmits AC power from the power station to the user terminal. Its basic components include power plants, substations, transmission lines and distribution lines. The operation process of the AC power supply line is: the power plant converts mechanical energy into AC power through power generation equipment, and then transmits the power to the substation. The substation regulates, boosts, and reduces the voltage of the power, and transmits it to each user terminal through the transmission line. At the user terminal, the AC power is distributed to each electrical equipment through the distribution line to meet the power needs of different electrical equipment. During the use process, lightning may directly hit the power equipment or line, causing equipment damage, failure or even complete burning. This will not only increase the cost of equipment maintenance and replacement, but may also affect the normal operation of the power supply system and cause power outages. Therefore, there is a special need for an AC power supply line lightning protection structure.

[0003] However, most of the existing AC power supply lines have poor lightning protection during use. The lack of effective lightning protection will increase the risk of power equipment being damaged or malfunctioning by lightning. Lightning may directly hit the equipment, causing it to burn or be damaged, increasing the cost of repair and replacement. If the power equipment is struck by lightning and cannot work properly, it may cause safety accidents such as fire and explosion inside the building, endangering the lives of people. Utility Model Content

[0004] The purpose of the utility model is to provide an AC power supply line lightning protection structure to solve the problem that the existing AC power supply line proposed in the above background technology has poor lightning protection effect during use, and the lack of effective lightning protection will increase the risk of power equipment being damaged or malfunctioning by lightning. Lightning may directly hit the equipment, causing the equipment to burn or be damaged, increasing the cost of repair and replacement. If the power equipment is struck by lightning and cannot work normally, it may cause safety accidents such as fire and explosion inside the building, endangering the life safety of personnel.

[0005] To achieve the above-mentioned purpose, the utility model provides an AC power supply line lightning protection structure, including a protective shell and an external lightning protection mechanism, the outer surface of the protective shell is provided with the external lightning protection mechanism, and the inner surface of the protective shell is provided with the internal lightning protection mechanism.

[0006] Preferably, the external lightning protection mechanism includes a lightning rod, a grounding down conductor, a grounding body, a power supply lightning arrester and an isolating switch. The outer surface of the protective shell is fixedly connected to the lightning rod, the bottom surface of the lightning rod is fixedly connected to the grounding down conductor, the bottom surface of the grounding down conductor is fixedly connected to the grounding body, the input end of the protective shell is fixedly connected to the power supply lightning arrester, and the top surface of the power supply lightning arrester is installed with an isolating switch.

[0007] Preferably, the lightning rod is made of copper, and the grounding down conductor is made of galvanized steel wire.

[0008] Preferably, the grounding body is composed of a metal rod and buried deep underground, and the isolating switch is fixedly connected to the terminal of the power supply lightning arrester.

[0009] Preferably, the internal lightning protection mechanism includes an overvoltage protector, an isolation transformer, a filter, a power supply monitor and a surge protector. The input end of the protective shell is fixedly connected to the overvoltage protector, the inner surface of the protective shell is fixedly connected to the isolation transformer, the inner surface of the protective shell is fixedly connected to the filter, the inner surface of the protective shell is fixedly connected to the power supply monitor, and the inner surface of the protective shell is fixedly connected to the surge protector.

[0010] Preferably, the overvoltage protector is electrically connected to the input end of the protective housing, and the isolation transformer, filter, and power supply monitor are installed in the power supply line.

[0011] Preferably, the surge protector is installed at a branch end of the power line.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: the AC power supply line lightning protection structure, through the setting of external lightning protection mechanism and internal lightning protection mechanism, the external lightning protection mechanism effectively guides lightning to the ground through components such as lightning rods and grounding down conductors, thereby preventing lightning from directly hitting the power line; while the internal lightning protection mechanism monitors and processes overvoltage inside the power line through components such as overvoltage protectors and surge protectors, thereby protecting equipment from overvoltage damage; various protection devices can quickly respond to the arrival of lightning or overvoltage, and quickly process them by means of fusing, conducting, etc., thereby improving the system's response speed to lightning and effectively protecting the equipment; and through the setting of multiple internal and external protection measures, the safety and reliability of the power line are improved, and the risk of equipment damage or accidents caused by lightning is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a side view schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the lightning rod and the grounding down conductor cooperating with each other in the utility model;

[0015] Figure 3 It is a side view schematic diagram of the internal structure of the protective shell of the utility model;

[0016] Figure 4 This is a circuit diagram of the utility model.

[0017] In the figure: 1. Protective shell; 2. External lightning protection mechanism; 201. Lightning rod; 202. Grounding down conductor; 203. Grounding body; 204. Power supply lightning arrester; 205. Isolating switch; 3. Internal lightning protection mechanism; 301. Overvoltage protector; 302. Isolation transformer; 303. Filter; 304. Power supply monitor; 305. Surge protector. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the implementation regulations described are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-4 The utility model provides an AC power supply line lightning protection structure: comprising a protective shell 1 and an external lightning protection mechanism 2, the outer surface of the protective shell 1 is provided with the external lightning protection mechanism 2, and the inner surface of the protective shell 1 is provided with an internal lightning protection mechanism 3.

[0020] Furthermore, the external lightning protection mechanism 2 includes a lightning rod 201, a grounding down conductor 202, a grounding body 203, a power supply lightning arrester 204 and an isolating switch 205. The outer surface of the protective housing 1 is fixedly connected with the lightning rod 201, the bottom surface of the lightning rod 201 is fixedly connected with the grounding down conductor 202, the bottom surface of the grounding down conductor 202 is fixedly connected with the grounding body 203, the input end of the protective housing 1 is fixedly connected with the power supply lightning arrester 204, and the top surface of the power supply lightning arrester 204 is fixedly connected with the grounding body 203. The isolating switch 205 is equipped. Through the arrangement of the lightning rod 201, the grounding down conductor 202, the grounding body 203, the power lightning arrester 204 and the isolating switch 205, during use, the lightning rod 201 concentrates the electric field through its tip and guides the lightning to the grounding down conductor 202, thereby preventing the lightning from directly hitting the power line. The grounding down conductor 202 conducts the lightning current from the lightning rod 201 to the grounding body 203, and quickly discharges it to the ground, preventing the lightning current from generating voltage in the building or equipment. The grounding body 203 conducts the lightning current to the ground through the grounding down conductor 202, dispersing and consuming the lightning energy. The power lightning arrester 204 is installed at the incoming end of the power line, and includes components such as a discharge tube and a varistor. When the lightning overvoltage arrives, the lightning arrester quickly conducts and guides the overvoltage energy to the grounding system to protect the subsequent equipment. The isolating switch 205 is used to control the on and off of the power line. In thunder and lightning weather, the isolating switch 205 can disconnect the power line to reduce the possibility of lightning intrusion.

[0021] Furthermore, the lightning rod 201 is made of copper, and the grounding down conductor 202 is made of galvanized steel wire. Copper has good electrical conductivity, and the galvanized steel wire has good mechanical strength and corrosion resistance while having good electrical conductivity, and is easy to be inserted into the ground.

[0022] Furthermore, the grounding body 203 is composed of a metal rod and buried deep underground, and the isolating switch 205 is fixedly connected to the terminal of the power supply lightning arrester 204, so that the grounding body 203 can safely disperse the lightning current underground.

[0023] Furthermore, the internal lightning protection mechanism 3 includes an overvoltage protector 301, an isolation transformer 302, a filter 303, a power supply monitor 304 and a surge protector 305. The input end of the protective housing 1 is fixedly connected to the overvoltage protector 301, the inner surface of the protective housing 1 is fixedly connected to the isolation transformer 302, the inner surface of the protective housing 1 is fixedly connected to the filter 303, the inner surface of the protective housing 1 is fixedly connected to the power supply monitor 304, and the inner surface of the protective housing 1 is fixedly connected to the surge protector 305. Through the arrangement of the overvoltage protector 301, the isolation transformer 302, the filter 303, the power supply monitor 304 and the surge protector 305, during use, the overvoltage protector 301 includes a fast fuse and a varistor, which is installed at the power input end of the device. In the event of an overvoltage When it arrives, the fast fuse blows, cutting off the power supply and protecting the equipment from overvoltage damage. The isolation transformer 302 is installed in the power line and consists of primary and secondary windings. It isolates and converts the power supply voltage through electromagnetic induction, blocks the direct conduction of lightning surges, and improves the safety of the power supply. The filter 303 can filter out high-frequency interference signals, smooth the power supply voltage, and ensure stable operation of the equipment. The power monitor 304 includes voltage and current sensors and control circuits, which are installed in the power line to monitor the power supply voltage and current in real time. When an abnormal situation is detected, the protection mechanism is triggered to further ensure the safety of the equipment. The surge protector 305 is installed at the branch end of the power line and includes a multi-stage discharge tube and a varistor. When an overvoltage is detected, the surge protector is quickly turned on to guide the overvoltage energy to the ground to protect the electrical equipment.

[0024] Furthermore, the overvoltage protector 301 is electrically connected to the input end of the protective housing 1 , and the isolation transformer 302 , the filter 303 , and the power monitor 304 are installed in the power supply line.

[0025] Furthermore, the surge protector 305 is installed at the branch end of the power line.

[0026] Working principle: A lightning protection structure for AC power supply lines. During use, the AC power supply line lightning protection structure concentrates the electric field through the lightning rod 201, guides the lightning to the grounding down conductor 202, and quickly discharges the lightning current to the ground through the grounding body 203 to prevent lightning from directly hitting the power line. The power supply lightning arrester 204 is installed at the incoming line end, including a discharge tube and a varistor. When the lightning overvoltage arrives, it quickly conducts and guides the overvoltage energy to the grounding system to protect the equipment. The isolation switch 205 can disconnect the power line during thunderstorms to reduce lightning intrusion. The overvoltage protector 301 cuts off the power supply through fast fuses and varistors when the overvoltage arrives to protect the equipment. The isolation transformer 302 isolates and converts the power supply voltage through electromagnetic induction to block the conduction of lightning surges. The filter 303 filters out high-frequency interference signals and smoothes the power supply voltage. The power monitor 304 monitors the power supply voltage and current in real time, detects abnormal conditions and triggers the protection mechanism. The surge protector 305 quickly turns on when overvoltage is detected, directing the overvoltage energy to the ground to protect the electrical equipment, thus completing a lightning protection structure for the AC power supply line.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the implementation rules without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lightning protection structure for an AC power supply line, comprising a protective housing (1) and an external lightning protection mechanism (2), characterized in that: An external lightning protection mechanism (2) is provided on the outer surface of the protective shell (1), and an internal lightning protection mechanism (3) is provided on the inner surface of the protective shell (1); The external lightning protection mechanism (2) comprises a lightning rod (201), a grounding down conductor (202), a grounding body (203), a power supply lightning arrester (204) and an isolating switch (205); the outer surface of the protective housing (1) is fixedly connected to the lightning rod (201); the bottom surface of the lightning rod (201) is fixedly connected to the grounding down conductor (202); the bottom surface of the grounding down conductor (202) is fixedly connected to the grounding body (203); the input end of the protective housing (1) is fixedly connected to the power supply lightning arrester (204); and the top surface of the power supply lightning arrester (204) is installed with an isolating switch (205); The internal lightning protection mechanism (3) comprises an overvoltage protector (301), an isolation transformer (302), a filter (303), a power supply monitor (304) and a surge protector (305); the input end of the protective housing (1) is fixedly connected to the overvoltage protector (301); the inner surface of the protective housing (1) is fixedly connected to the isolation transformer (302); the inner surface of the protective housing (1) is fixedly connected to the filter (303); the inner surface of the protective housing (1) is fixedly connected to the power supply monitor (304); and the inner surface of the protective housing (1) is fixedly connected to the surge protector (305).

2. The AC power supply line lightning protection structure according to claim 1, characterized in that: The lightning rod (201) is made of copper, and the grounding down conductor (202) is made of galvanized steel wire.

3. The AC power supply line lightning protection structure according to claim 1, characterized in that: The grounding body (203) is composed of a metal rod and buried deep underground, and the isolating switch (205) is fixedly connected to the connection terminal of the power supply lightning arrester (204).

4. The AC power supply line lightning protection structure according to claim 1, characterized in that: The overvoltage protector (301) is electrically connected to the input end of the protective housing (1), and the isolation transformer (302), the filter (303), and the power supply monitor (304) are installed in the power supply line.

5. The AC power supply line lightning protection structure according to claim 1, characterized in that: The surge protector (305) is installed at the branch end of the power line.

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