CN205489506U - Thunder and lightning protection circuit for high voltage direct current power supply system - Google Patents
Thunder and lightning protection circuit for high voltage direct current power supply system Download PDFInfo
- Publication number
- CN205489506U CN205489506U CN201620228402.1U CN201620228402U CN205489506U CN 205489506 U CN205489506 U CN 205489506U CN 201620228402 U CN201620228402 U CN 201620228402U CN 205489506 U CN205489506 U CN 205489506U
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- lightning protection
- varistor
- thunder
- discharge tube
- lightning
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Abstract
The utility model provides a thunder and lightning protection circuit for high voltage direct current power supply system, thunder and lightning protection circuit and high voltage dc way parallel connection, it includes piezo -resistor, the thunder and lightning protection circuit still includes gas discharge tube and temperature fuse, and gas discharge tube opens a way when no thunder and lightning takes place completely, can block piezo -resistor's leakage current, and the afebril build -up effect of lightning protection device long -time uses the insulation against ground that also can not destroy high -voltage direct current system, and piezo -resistor has sealed the hot dropout separator of temperature fuse as the lightning protection device admittedly, the utility model discloses not having the problem of leakage current, not destroying the insulation against ground of system, can not increase the high voltage direct current power supply system personnel risk of electrocuteeing, avoided the hot build -up effect of lightning protection device, life is longer, has reduced the lightning protection device and has damaged the fire risk who brings.
Description
Technical field
The present invention relates to a kind of lightning protected circuit, especially a kind of lightning protected circuit of HVDC electric power system.
Background technology
HVDC electric power system is to be arranged through the conversion of the series of voltage such as over commutation or DC/DC conversion by communication power supply
Executing, provide the electric power system of working power with higher DC voltage for equipment, HVDC electric power system is generally of investment
The advantages such as little, efficiency is high, but owing to supply voltage is high, for the consideration of the angle that guarantees personal safety, the most all use suspension to supply
Electricity, system only has electromotive force over the ground, when personnel touch single supply line, Danger Electric shock risk will not occur.HVDC electric power system
Using communication lightning-protection device to do lightning protected, the heat accumulation produced on lightning protection device due to unidirectional current is more than alternating current on lightning protection device
Heat accumulation, be easily caused communication lightning-protection device and cross cause thermal damage, for Personal Safety consider, high-voltage direct current is substantially employing
High impedance mode works over the ground, also has communication lightning-protection device use MOV varistor as main protective device, but pressure-sensitive electricity
There is leakage current in resistance, if leakage current increases to certain degree, by the insulation against ground of the system of destruction, increases attendant or nothing
Meaning touches the personal safety risk of personnel.
Summary of the invention
For solving an above existing difficult problem, the invention discloses a kind of lightning protected circuit of HVDC electric power system.
A kind of lightning protected circuit of HVDC electric power system, described lightning protected circuit is in parallel with hvdc circuit
Connecting, it includes that varistor, described lightning protected circuit also include gas-discharge tube and Thermal Cutoffs.
Further, described lightning protected circuit is divided into Part I and Part II, and Part I includes varistor
And Thermal Cutoffs, described varistor and Thermal Cutoffs are connected in series, and Part I is in parallel with hvdc circuit；The
Two parts include gas-discharge tube, varistor and Thermal Cutoffs, described Thermal Cutoffs one end electrically connect with varistor,
One end electrically connects with hvdc circuit, and the other end of described varistor electrically connects with gas-discharge tube, described gas discharge
The other end ground connection of pipe.
Further, described varistor is the varistor of band Temperature protection.
Further, the quantity of described varistor and Thermal Cutoffs is 3, and the quantity of described gas-discharge tube is 2
Individual.
Beneficial effect: gas-discharge tube is opened a way completely when occurring without thunder and lightning, can block the leakage current of varistor, anti-
Thunder device is without heat accumulation effect, long-time use also will not destroy the insulation against ground of high-voltage direct current, varistor sealing temperature
Degree electric fuse is as the hot dropout segregation apparatus of lightning protection device, and the present invention does not exist the problem of leakage current, do not destroys system over the ground
Insulation, will not increase HVDC electric power system personnel and get an electric shock risk, it is to avoid the heat accumulation effect of lightning protection device, and service life is more
Long, reduce lightning protection device and damage the fire risk brought.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention.
Wherein, 1, HVDC Equipments, 2, power receiving equipment, 3, gas-discharge tube, 4, varistor, 5, Thermal Cutoffs.
Detailed description of the invention
In conjunction with accompanying drawing, the present invention is described in further details.
As it can be seen, a kind of lightning protected circuit of HVDC electric power system, described lightning protected circuit and high straightening
Current circuit is connected in parallel, and it includes that varistor 4, described lightning protected circuit also include gas-discharge tube 3 and Thermal Cutoffs
5, described lightning protected circuit is divided into Part I and Part II, and Part I includes varistor 4 and Thermal Cutoffs 5,
Described varistor 4 and Thermal Cutoffs 5 are connected in series, and Part I is in parallel with hvdc circuit；Part II includes
Gas-discharge tube 3, varistor 4 and Thermal Cutoffs 5, described Thermal Cutoffs 5 one end electrically connects with varistor 4, one end
Electrically connecting with hvdc circuit, the other end of described varistor 4 electrically connects with gas-discharge tube 3, described gas-discharge tube 3
Other end ground connection, described varistor 4 is the varistor of band Temperature protection, described varistor 4 and Thermal Cutoffs 5
Quantity is 3, and the quantity of described gas-discharge tube 3 is 2.
Embodiment: the lightning-protected product that original HVDC lightning-protection system is used is usually and is connected with varistor by fuse
After be directly incorporated into system, owing to varistor energy accumulation under DC operation state is higher than under AC conditions, therefore, directly
Under the conditions of stream, varistor is easier to leakage current, and then is damaged.The present invention is by TOC Thermal Cutoffs 5, varistor
4 and gas-discharge tube 3 carry out series design, Thermal Cutoffs 5 has self-reparability, when the operating temperature of varistor 4 exceedes
During preset value, Thermal Cutoffs 5 disconnects, and when temperature returns to room temperature, Thermal Cutoffs 5 resets, and at this moment spark gap is incorporated to again
System, self there is the problem of leakage current in varistor 4, gas-discharge tube 3 self exists the problem that cannot interdict subsequent current,
By incorporating its respective advantage after both devices in series, turn avoid respective inferior position, combinational circuit is reaching system point
Start during thermoelectricity pressure, reach system stalls during pressure limiting level, and owing to varistor 4 becomes in resistance under normal voltage
State, what its leakage current cannot meet gas-discharge tube 3 maintains electric current, therefore gas-discharge tube 3 automatic distinguishing electric arc.
The ultimate principle of the present invention and principal character and advantages of the present invention, the technology of the industry have more than been shown and described
Personnel, it should be appreciated that the present invention is not restricted to the described embodiments, simply illustrating this described in above-described embodiment and description
The principle of invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, and these become
Change and improvement both fall within scope of the claimed invention, the claimed scope of invention by appending claims and etc.
Effect thing defines.
Claims (4)
1. the lightning protected circuit of HVDC electric power system, described lightning protected circuit is in parallel with hvdc circuit even
Connecing, it includes varistor (4), it is characterised in that: described lightning protected circuit also includes gas-discharge tube (3) and Temperature protection
Silk (5).
A kind of lightning protected circuit of HVDC electric power system the most according to claim 1, it is characterised in that: described thunder
Electric protection circuit is divided into Part I and Part II, and Part I includes varistor (4) and Thermal Cutoffs (5), described
Varistor (4) and Thermal Cutoffs (5) are connected in series, and Part I is in parallel with hvdc circuit；Part II includes
Gas-discharge tube (3), varistor (4) and Thermal Cutoffs (5), described Thermal Cutoffs (5) one end and varistor (4) electricity
Connect, one end electrically connects with hvdc circuit, and the other end of described varistor (4) electrically connects with gas-discharge tube (3), institute
State the other end ground connection of gas-discharge tube (3).
A kind of lightning protected circuit of HVDC electric power system the most according to claim 1, it is characterised in that: described pressure
Quick resistance (4) is the varistor of band Temperature protection.
A kind of lightning protected circuit of HVDC electric power system the most according to claim 1, it is characterised in that: described pressure
The quantity of quick resistance (4) and Thermal Cutoffs (5) is 3, and the quantity of described gas-discharge tube (3) is 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620228402.1U CN205489506U (en) | 2016-03-22 | 2016-03-22 | Thunder and lightning protection circuit for high voltage direct current power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620228402.1U CN205489506U (en) | 2016-03-22 | 2016-03-22 | Thunder and lightning protection circuit for high voltage direct current power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205489506U true CN205489506U (en) | 2016-08-17 |
Family
ID=56652653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620228402.1U Expired - Fee Related CN205489506U (en) | 2016-03-22 | 2016-03-22 | Thunder and lightning protection circuit for high voltage direct current power supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205489506U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105610143A (en) * | 2016-03-22 | 2016-05-25 | 广州市金宏骏科技工程有限公司 | Lightning protection circuit for high-voltage direct current power supply system |
| CN106208786A (en) * | 2016-08-25 | 2016-12-07 | 苏州苏宝新能源科技有限公司 | There is self discharge, H bridge inversion and the solar air-conditioner system of power lightning protection function |
| CN106786460A (en) * | 2016-12-29 | 2017-05-31 | 康迎利 | Lightning-protection module |
-
2016
- 2016-03-22 CN CN201620228402.1U patent/CN205489506U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105610143A (en) * | 2016-03-22 | 2016-05-25 | 广州市金宏骏科技工程有限公司 | Lightning protection circuit for high-voltage direct current power supply system |
| CN106208786A (en) * | 2016-08-25 | 2016-12-07 | 苏州苏宝新能源科技有限公司 | There is self discharge, H bridge inversion and the solar air-conditioner system of power lightning protection function |
| CN106786460A (en) * | 2016-12-29 | 2017-05-31 | 康迎利 | Lightning-protection module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210114 Address after: Room a-1321, building 3, 20 Yong'an Road, Shilong Economic Development Zone, Mentougou District, Beijing Patentee after: Beijing Qianyuan Wind power technology Co.,Ltd. Address before: 510507 room 1606, Xinyan building, 93 Yanling Road, Tianhe District, Guangzhou City, Guangdong Province Patentee before: GUANGZHOU KINGHOME TECHNOLOGY ENGINEERING Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160817 |