CN112186724A - Protective device based on overvoltage absorption energy storage - Google Patents
Protective device based on overvoltage absorption energy storage Download PDFInfo
- Publication number
- CN112186724A CN112186724A CN201911014473.6A CN201911014473A CN112186724A CN 112186724 A CN112186724 A CN 112186724A CN 201911014473 A CN201911014473 A CN 201911014473A CN 112186724 A CN112186724 A CN 112186724A
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- CN
- China
- Prior art keywords
- voltage
- energy storage
- piezoresistor
- overvoltage
- storage battery
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/042—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage comprising means to limit the absorbed power or indicate damaged over-voltage protection device
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
Abstract
The invention discloses a protective device based on overvoltage absorption energy storage, which can improve the overvoltage protection effect and fully utilize the energy characteristic of overvoltage to convert the overvoltage into usable electric energy for storage. The device comprises a gas discharge tube, a piezoresistor and an N-level step-down isolation energy storage circuit; the N-level voltage reduction isolation energy storage circuits are sequentially connected in series and then connected in parallel at two ends of the piezoresistor, each level of voltage reduction isolation energy storage circuit comprises a high-voltage resistor, a high-voltage capacitor, a diode and a storage battery, the protective device combines a nonlinear gas discharge tube, the piezoresistor, a linear element high-voltage resistor, the high-voltage capacitor, the energy storage battery and the like, the lightning overvoltage or the internal overvoltage of the power grid is converted into the low voltage which can be absorbed by the storage battery to be charged, and the storage battery stores the absorbed electric energy and improves the overvoltage protection effect. Is suitable for popularization and application in various application fields of electric power.
Description
Technical Field
The invention relates to the field of lightning and overvoltage protection, in particular to a protection device based on overvoltage absorption and energy storage.
Background
The existing lightning protection idea is to take lightning as a disaster, and comprehensive lightning protection measures such as lightning rod, shielding, grounding, reasonable wiring, SPD (lightning protection device composed of nonlinear elements, such as piezoresistor, discharge tube, TVS tube and the like) and the like are adopted to carry out lightning protection, so that the safety of equipment and personnel is protected. For the protection of induction mines, the measures of installing SPD are mostly adopted. Because the overvoltage that the thunder and lightning produced and the inside overvoltage that produces of electric wire netting are an electric energy itself, have certain value of utilizing, current lightning protection mode is all direct to introduce the earth with the overvoltage directly and directly discharge, and this kind of mode can cause the waste of electric energy, and overvoltage protection effect is also not good moreover. In order to improve the overvoltage protection effect and fully utilize the energy characteristic of overvoltage, the invention provides a protection device based on overvoltage absorption energy storage, which converts overvoltage into available electric energy for storage, reduces the limiting voltage of the protection device and improves the protection effect.
Disclosure of Invention
The invention aims to provide a protective device based on overvoltage absorption energy storage, which can improve the overvoltage protection effect and fully utilize the energy characteristic of overvoltage to convert the overvoltage into usable electric energy for storage.
The technical scheme adopted by the invention for solving the technical problems is as follows: the protective device based on overvoltage absorption energy storage comprises a gas discharge tube, a piezoresistor and an N-level step-down isolation energy storage circuit; one end of the gas discharge tube is connected with an L line of a power circuit, the other end of the gas discharge tube is connected with one end of the piezoresistor, the other end of the piezoresistor is connected with the ground wire, the N-level step-down isolation energy storage circuits are sequentially connected in series and then connected in parallel at the two ends of the piezoresistor, each level of step-down isolation energy storage circuit comprises a high-voltage resistor, a high-voltage capacitor, a diode and a storage battery, the anode and the cathode of the high-voltage capacitor are respectively connected with two ends of the high-voltage resistor, the anode of the diode is connected with the anode of the high-voltage capacitor, the cathode of the diode is connected with the anode of the storage battery, the cathode of the storage battery is connected with the cathode of the high-voltage capacitor, the high-voltage resistors of the N-level step-down isolation energy storage circuit are connected in series, and the value N is integer +1, the value N is Up/Um, Up refers to the maximum residual voltage of the piezoresistor, and Um refers to the maximum allowable charging voltage of the storage battery.
Further, the gas discharge tube is a 2R-600D-40 type gas discharge tube.
Further, the piezoresistor is a 34S431K type piezoresistor.
Further, the high-voltage resistor is a 5W10 type high-voltage resistor.
Further, the high-voltage capacitor is a 10UF2KV type high-voltage capacitor.
Further, the diode is a 1N4007 type diode.
Further, the storage battery is a 12V8AH type storage battery.
The invention has the beneficial effects that: the protective device based on the overvoltage absorption energy storage is characterized in that a series circuit composed of a gas discharge tube and a piezoresistor is connected in parallel between a power supply line L and a ground wire, when the voltage of the power supply line L is a normal value, a nonlinear protective circuit composed of the gas discharge tube and the piezoresistor is in a non-conducting state, no current flows through the gas discharge tube and the piezoresistor, and the protective circuit is in a non-starting state; when external lightning strike or internal overvoltage occurs in a power supply circuit and exceeds the starting voltage of a protection circuit consisting of a gas discharge tube and a piezoresistor, the gas discharge tube and the piezoresistor are in a conducting state, when the gas discharge tube and the piezoresistor are broken down due to the overvoltage, the voltage is limited within a certain range due to the voltage limiting effect of the piezoresistor, then the voltage at the two ends of the piezoresistor is subjected to N-level voltage division by using a high-voltage resistor and a high-voltage capacitor, and the internal resistance is extremely small after the gas discharge tube is conducted; the internal resistance of the piezoresistor is larger after the piezoresistor is conducted, so the residual voltage of the protection circuit is mainly determined by the piezoresistor; according to the maximum value Up of residual voltage of the piezoresistor and the maximum value Um allowed by the charging voltage of the storage battery, the required voltage division stage number N can be calculated, wherein N is N and the value of N is rounded to +1, and N is Up/Um; the isolation circuit composed of diodes isolates and protects the storage battery, the charging electrode is led out from the rear end of each level of isolation circuit and is supplied to the storage battery for charging, when the storage battery absorbs overvoltage energy, the current flowing through the piezoresistor can be reduced, thereby reducing the limiting voltage at the two ends of the piezoresistor, improving the protection effect of equipment, improving the overvoltage protection effect, and the storage battery can be replaced and taken down for cyclic utilization after being fully charged. The protective device based on the overvoltage absorption energy storage converts overvoltage energy into energy which can be utilized, and plays a role in changing harm into treasure; meanwhile, the limiting voltage of the overvoltage protection device is reduced, and the protection effect on the electronic equipment is improved.
Drawings
Fig. 1 is a schematic diagram of a frame structure of an overvoltage absorption energy storage based protection device according to the invention;
description of reference numerals: the gas discharge tube 1, the piezoresistor 2, the step-down isolation energy storage circuit 3, the high-voltage resistor 301, the high-voltage capacitor 302, the diode 303 and the storage battery 304.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1, the overvoltage absorption energy storage based protection device is applied to a 220V ac single-phase power supply, and includes a gas discharge tube 1, a voltage dependent resistor 2, and an N-stage step-down isolation energy storage circuit 3; one end of the gas discharge tube 1 is connected with an L line of a power supply circuit, the other end of the gas discharge tube 1 is connected with one end of a piezoresistor 2, the other end of the piezoresistor 2 is connected with a ground wire, the N-level step-down isolation energy storage circuits 3 are sequentially connected in series and then connected in parallel with two ends of the piezoresistor 2, each level of step-down isolation energy storage circuit 3 comprises a high-voltage resistor 301, a high-voltage capacitor 302, a diode 303 and a storage battery 304, the positive pole and the negative pole of the high-voltage capacitor 302 are respectively connected with two ends of the high-voltage resistor 301, the positive pole of the diode 303 is connected with the positive pole of the high-voltage capacitor 302, the negative pole of the diode 303 is connected with the positive pole of the storage battery 304, the negative pole of the storage battery 304 is connected with the negative pole of the high-voltage capacitor 302, the high-voltage resistors 301 of the N-level step-down isolation energy storage, um refers to the maximum allowable charging voltage of the battery 304. The protective device based on the overvoltage absorption energy storage is characterized in that a series circuit composed of a gas discharge tube 1 and a piezoresistor 2 is connected in parallel between a power supply line L and a ground wire, when the voltage of the power supply line L is a normal value, a nonlinear protective circuit composed of the gas discharge tube 1 and the piezoresistor 2 is in a non-conducting state, no current flows through the gas discharge tube 1 and the piezoresistor 2, and the protective circuit is in a non-starting state; when external lightning strike or internal overvoltage occurs in a power supply circuit and exceeds the starting voltage of a protection circuit consisting of the gas discharge tube 1 and the piezoresistor 2, the gas discharge tube 1 and the piezoresistor 2 are in a conducting state, when the overvoltage enables the gas discharge tube 1 and the piezoresistor 2 to be broken down, the voltage is limited within a certain range due to the voltage limiting effect of the piezoresistor 2, then the voltage at the two ends of the piezoresistor 2 is subjected to N-level voltage division by the high-voltage resistor 301 and the high-voltage capacitor 302, and the internal resistance is extremely small after the gas discharge tube 1 is conducted; the internal resistance of the piezoresistor 2 is larger after the piezoresistor is switched on, so the residual voltage of the protection circuit is mainly determined by the piezoresistor 2; according to the maximum value Up of the residual voltage of the piezoresistor 2 being 1500V and the maximum value Um allowed by the charging voltage of the storage battery 304 being 20V, the required voltage division stage number N can be calculated, wherein the value N is integer +1 being 76(N is Up/Um being 75), in order to ensure the safety of the charging circuit, the maximum voltage division value of each stage can be calculated according to the voltage division stage number N, and the appropriate values of the high-voltage resistor 301 and the high-voltage capacitor 302 are selected; the isolation circuit composed of the diode 303 isolates and protects the storage battery 304, the charging electrode is led out from the rear end of each stage of isolation circuit and is supplied to the storage battery 304 for charging, when the storage battery 304 absorbs overvoltage energy, the current flowing through the piezoresistor 2 can be reduced, thereby reducing the limiting voltage at the two ends of the piezoresistor 2, improving the protection effect on equipment, improving the overvoltage protection effect, and replacing the storage battery 304 after being fully charged for cyclic utilization. The protective device based on the overvoltage absorption energy storage converts overvoltage energy into energy which can be utilized, and plays a role in changing harm into treasure; meanwhile, the limiting voltage of the overvoltage protection device is reduced, and the protection effect on the electronic equipment is improved.
In the above embodiment, the gas discharge tube 1, the varistor 2, and the high-voltage resistor 301 are selected according to the voltage class of the line. Specifically, the gas discharge tube 1 is preferably a 2R-600D-40 type gas discharge tube, the varistor 2 is preferably a 34S431K type varistor, and the high-voltage resistor 301 is preferably a 5W10 type high-voltage resistor. The high-voltage capacitor 302 is selected according to the voltage limit levels of the gas discharge tube 1 and the voltage dependent resistor 2, specifically, the high-voltage capacitor 302 is preferably a 10UF2KV type high-voltage capacitor, and further, the diode 303 is preferably 1N 4007. The battery 304 is selected according to the use requirements of the user. In general, the battery 304 is preferably a 12V8AH type battery.
Claims (7)
1. Protector based on overvoltage absorbs energy storage, its characterized in that: the device comprises a gas discharge tube (1), a piezoresistor (2) and an N-level step-down isolation energy storage circuit (3); one end of the gas discharge tube (1) is connected with an L line of a power supply circuit, the other end of the gas discharge tube (1) is connected with one end of a piezoresistor (2), the other end of the piezoresistor (2) is connected with a ground wire, the N-level step-down isolation energy storage circuits (3) are sequentially connected in series and then connected in parallel with two ends of the piezoresistor (2), each level of step-down isolation energy storage circuit (3) comprises a high-voltage resistor (301), a high-voltage capacitor (302), a diode (303) and a storage battery (304), the positive pole and the negative pole of the high-voltage capacitor (302) are respectively connected with two ends of the high-voltage resistor (301), the positive pole of the diode (303) is connected with the positive pole of the high-voltage capacitor (302), the negative pole of the diode (303) is connected with the positive pole of the storage battery (304), the negative pole of the storage battery (304) is connected with the negative pole of the high-voltage capacitor (302), and the, the value of N equals to N equals to integer +1, the value of N equals to Up/Um, wherein Up refers to the maximum residual voltage of the piezoresistor (2), and Um refers to the maximum allowable charging voltage of the storage battery (304).
2. The overvoltage absorption energy storage based protection device of claim 1, wherein: the gas discharge tube (1) is a 2R-600D-40 type gas discharge tube.
3. The overvoltage absorption energy storage based protection device according to claim 2, wherein: the piezoresistor (2) is a 34S431K type piezoresistor.
4. The overvoltage absorption energy storage based protection device according to claim 3, wherein: the high-voltage resistor (301) is a 5W10 type high-voltage resistor.
5. The overvoltage absorption energy storage based protection device according to claim 4, wherein: the high-voltage capacitor (302) is a 10UF2KV type high-voltage capacitor.
6. The overvoltage absorption energy storage based protection device according to claim 5, wherein: the diode (303) is a 1N4007 type diode.
7. The overvoltage absorption energy storage based protection device according to claim 6, wherein: the storage battery (304) is a 12V8AH type storage battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911014473.6A CN112186724A (en) | 2019-10-23 | 2019-10-23 | Protective device based on overvoltage absorption energy storage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911014473.6A CN112186724A (en) | 2019-10-23 | 2019-10-23 | Protective device based on overvoltage absorption energy storage |
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| CN112186724A true CN112186724A (en) | 2021-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911014473.6A Pending CN112186724A (en) | 2019-10-23 | 2019-10-23 | Protective device based on overvoltage absorption energy storage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114325066A (en) * | 2021-11-25 | 2022-04-12 | 双登集团股份有限公司 | Overvoltage detection and energy absorption device |
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| CN103715679A (en) * | 2013-12-11 | 2014-04-09 | 四川中光防雷科技股份有限公司 | Thunder and lightning storage and protection method and device thereof based on energy storage by capacitor |
| CN104009460A (en) * | 2014-05-21 | 2014-08-27 | 国网四川省电力公司成都市新都供电分公司 | Lighting protection device for power transmission line monitoring system |
| CN205407247U (en) * | 2016-02-19 | 2016-07-27 | 英飞特电子（杭州）股份有限公司 | Lightning protection circuit and electrical power unit |
| US20170012425A1 (en) * | 2014-02-05 | 2017-01-12 | Cirprotec, S.L. | Combined device for electrical protection against transient overvoltages and monitoring of an electrical installation |
| WO2018000791A1 (en) * | 2016-06-29 | 2018-01-04 | 四川中光防雷科技股份有限公司 | Surge protection circuit and surge protective device |
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2019
- 2019-10-23 CN CN201911014473.6A patent/CN112186724A/en active Pending
Patent Citations (5)
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| CN103715679A (en) * | 2013-12-11 | 2014-04-09 | 四川中光防雷科技股份有限公司 | Thunder and lightning storage and protection method and device thereof based on energy storage by capacitor |
| US20170012425A1 (en) * | 2014-02-05 | 2017-01-12 | Cirprotec, S.L. | Combined device for electrical protection against transient overvoltages and monitoring of an electrical installation |
| CN104009460A (en) * | 2014-05-21 | 2014-08-27 | 国网四川省电力公司成都市新都供电分公司 | Lighting protection device for power transmission line monitoring system |
| CN205407247U (en) * | 2016-02-19 | 2016-07-27 | 英飞特电子（杭州）股份有限公司 | Lightning protection circuit and electrical power unit |
| WO2018000791A1 (en) * | 2016-06-29 | 2018-01-04 | 四川中光防雷科技股份有限公司 | Surge protection circuit and surge protective device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114325066A (en) * | 2021-11-25 | 2022-04-12 | 双登集团股份有限公司 | Overvoltage detection and energy absorption device |
| CN114325066B (en) * | 2021-11-25 | 2023-01-20 | 双登集团股份有限公司 | Overvoltage detection and energy absorption device |
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Application publication date: 20210105 |