CN103050952A - Bus type large-capacity overvoltage protection device - Google Patents
Bus type large-capacity overvoltage protection device Download PDFInfo
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- CN103050952A CN103050952A CN2011103128573A CN201110312857A CN103050952A CN 103050952 A CN103050952 A CN 103050952A CN 2011103128573 A CN2011103128573 A CN 2011103128573A CN 201110312857 A CN201110312857 A CN 201110312857A CN 103050952 A CN103050952 A CN 103050952A
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- zno resistors
- overvoltage protection
- oxide
- resistors device
- electric field
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Abstract
The invention discloses a bus type large-capacity overvoltage protection device which comprises a zinc oxide overvoltage protector, especially the zinc oxide overvoltage protector comprises a first oxide zinc resistor (2) and a second oxide zinc resistor (3) which are connected in parallel, wherein an alpha angle of an intermediate electric field region of the second oxide zinc resistor (3) is 110-120 percent that of an intermediate electric field region of the first oxide zinc resistor (2), a direct current reference voltage value of the second oxide zinc resistor (3) is 90-95 percent that of the first oxide zinc resistor (2), an alpha angle of an intermediate electric field region of the second oxide zinc resistor (3) is 115 percent that of an intermediate electric field region of the first oxide zinc resistor (2), a direct current reference voltage value of the second oxide zinc resistor (3) is 93 percent that of the first oxide zinc resistor (2), and the second oxide zinc resistor (3) is formed by connecting more than two zinc oxide resistors in parallel. The bus type large-capacity overvoltage protection device can be widely applied to overvoltage protection of a power system.
Description
Technical field
The present invention relates to a kind of large capacity overvoltage protection, the large capacity overvoltage protection of especially a kind of bus type.
Background technology
In electric power system; people are in order to prevent that atmospheric over-voltage and switching overvoltage are to system and the wherein infringement of equipment; the overvoltage protection that cross-over connection is comprised of the zinc oxide overvoltage protection device between bus and the ground of being everlasting is as just widely used in the present electric power system.Though these overvoltage protections can suppress various overvoltage effectively; exist also the shortcoming part: the situation that long-time sustained overvoltage occurs in the electric power system is many; such as system resonance overvoltage etc.; it is long, not obvious to the infringement of equipment that these overvoltage generally show as the duration; but the infringement to overvoltage protection is just more serious, has improved widely the rate of failure of overvoltage protection.If the capacity of all overvoltage protections is all improved, the construction cost of electric power system will be improved greatly; If only reduce the operating value of bus over voltage protection device, and improve its capacity, then can cause any overvoltage all can only be absorbed by the bus over voltage protection device, finally cause the damage of bus over voltage protection device.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of rational in infrastructure for overcoming shortcoming part of the prior art, the practical large capacity overvoltage protection of bus type.
For solving technical problem of the present invention, the technical scheme that adopts is: the large capacity overvoltage protection of bus type is comprised of the zinc oxide overvoltage protection device, particularly,
Described zinc oxide overvoltage protection device is connected in parallel by the first ZnO resistors device and the second ZnO resistors device and consists of; the α angle of the middle electric field region of described the second ZnO resistors device is that the DC reference voltage value of 110～120%, the second ZnO resistors device at electric field region α angle in the first ZnO resistors device is 90～95% of the first ZnO resistors device DC reference voltage value.
Further improvement as the large capacity overvoltage protection of bus type, the α angle of the middle electric field region of described the second ZnO resistors device is that the DC reference voltage value of 115%, the second ZnO resistors device at electric field region α angle in the first ZnO resistors device is 93% of the first ZnO resistors device DC reference voltage value; Described the second ZnO resistors device is connected in parallel by the ZnO resistors device more than two and consists of.
Beneficial effect with respect to prior art is, the applicant goes through various superpotential long-term a large amount of tests, the overcurrent that produces based on long-term overvoltage is smaller objective facts all basically, adopting the zinc oxide overvoltage protection device to be connected in parallel by the first ZnO resistors device and the second ZnO resistors device consists of, and the α angle of the middle electric field region of the second ZnO resistors device be in the first ZnO resistors device electric field region α angle 110～120%, the DC reference voltage value of the second ZnO resistors device is 90～95% technical scheme of the first ZnO resistors device DC reference voltage value, so that the voltage-current characteristic of the first and second ZnO resistors devices has produced intersection point, and the first and second ZnO resistors utensils have had different residual voltage values; Thereby make it in the face of various overvoltage the time, can press the size of the overcurrent of overvoltage generation, automatically classification action when namely overcurrent is less than 90～110A, is absorbed by the second ZnO resistors device, otherwise, absorbed by the first ZnO resistors device.The overvoltage protection of this structure; can fully effectively suppress various overvoltage; reduced widely again the rate of failure of overvoltage protection; also do not need the capacity of all overvoltage protections is all improved; or reducing its capacity of basis raising of bus over voltage protection device action value, rational in infrastructure, practical characteristics are arranged more.
Further embodiment as beneficial effect, one be the α angle of the middle electric field region of the second ZnO resistors device be preferably electric field region α angle in the first ZnO resistors device 115%, the DC reference voltage value of the second ZnO resistors device is preferably 93% of the first ZnO resistors device DC reference voltage value, is beneficial to more accurately automatic classification action; Two is that the second ZnO resistors device preferably is connected in parallel by the ZnO resistors device more than two and consists of, and not only is beneficial to its heat radiation, also is easy to reduce the cost of single ZnO resistors device.
Description of drawings
Below in conjunction with accompanying drawing optimal way of the present invention is described in further detail.
Fig. 1 is a kind of basic structure schematic diagram of the present invention.
Embodiment
Referring to Fig. 1; being constructed as follows of the large capacity overvoltage protection of bus type: being connected in parallel by the first ZnO resistors device 2 and the second ZnO resistors device 3 consists of this device; the α angle of the middle electric field region of the second ZnO resistors device 3 wherein is 115 (can be 110～120) % at electric field region α angle in the first ZnO resistors device 2, and the DC reference voltage value of the second ZnO resistors device 3 is 93 (can be 90～95) % of the first ZnO resistors device 2 DC reference voltage values.The second ZnO resistors device 3 is connected in parallel by two ZnO resistors devices and consists of.
During use, only need two ends with this device be connected across between the bus 1 of electric power system and the ground and get final product.When atmosphere or switching overvoltage in system, occurring, at first by lower the second ZnO resistors device 3 absorbed energies of DC reference voltage value, when the superpotential electric current that occurs during greater than 100A, because the residual voltage value after 3 actions of the second ZnO resistors device is higher, can't absorb in time overcurrent that overvoltage produces scabbles or reduces superpotential peak value, residual superpotential peak value will force 2 conductings of the first ZnO resistors device, add that the residual voltage value after 2 actions of the first ZnO resistors device is lower, thereby make most current directions the first ZnO resistors device 2 in the overcurrent, and by its absorption, guaranteed that the second ZnO resistors device 3 can not suffer damage because of the superpotential energy of long-term absorption.
Obviously, those skilled in the art can carry out various changes and modification to the large capacity overvoltage protection of bus type of the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (3)
1. the large capacity overvoltage protection of bus type is comprised of the zinc oxide overvoltage protection device, it is characterized in that:
Described zinc oxide overvoltage protection device is by the first ZnO resistors device (2) and the second ZnO resistors device (3) formation that is connected in parallel; the α angle of the middle electric field region of described the second ZnO resistors device (3) is that the DC reference voltage value of 110～120%, the second ZnO resistors device (3) at electric field region α angle in the first ZnO resistors device (2) is 90～95% of the first ZnO resistors device (2) DC reference voltage value.
2. the large capacity overvoltage protection of bus type according to claim 1; the α angle that it is characterized in that the middle electric field region of the second ZnO resistors device (3) is that the DC reference voltage value of 115%, the second ZnO resistors device (3) at electric field region α angle in the first ZnO resistors device (2) is 93% of the first ZnO resistors device (2) DC reference voltage value.
3. the large capacity overvoltage protection of bus type according to claim 2 is characterized in that the second ZnO resistors device (3) is connected in parallel by the ZnO resistors device more than two to consist of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103128573A CN103050952A (en) | 2011-10-14 | 2011-10-14 | Bus type large-capacity overvoltage protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103128573A CN103050952A (en) | 2011-10-14 | 2011-10-14 | Bus type large-capacity overvoltage protection device |
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| Publication Number | Publication Date |
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| CN103050952A true CN103050952A (en) | 2013-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2011103128573A Pending CN103050952A (en) | 2011-10-14 | 2011-10-14 | Bus type large-capacity overvoltage protection device |
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| CN (1) | CN103050952A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110445111A (en) * | 2019-08-02 | 2019-11-12 | 南京南瑞继保电气有限公司 | A kind of magnetic control type paralleling reactor control winding DC bus overvoltage protection system |
| CN114914042A (en) * | 2022-05-07 | 2022-08-16 | 吉林昱丰电气科技有限公司 | High-energy high-residual-voltage-ratio nonlinear resistor disc and parallel circuit |
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| US5023746A (en) * | 1988-12-05 | 1991-06-11 | Epstein Barry M | Suppression of transients by current sharing |
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| CN2783496Y (en) * | 2005-02-28 | 2006-05-24 | 张云一 | Combined overvoltage protector with parallel connected gap |
| CN201430437Y (en) * | 2009-06-26 | 2010-03-24 | 成都兴业雷安电子有限公司 | High-capacity pressure-sensitive lightning protection module |
| CN201498988U (en) * | 2009-10-10 | 2010-06-02 | 朱仲彦 | ZnO and SiC compound circuit used for arc extinction, harmony extinction and overvoltage protection |
| CN201690231U (en) * | 2010-04-13 | 2010-12-29 | 郭道胜 | Nonlinear neutral point ground resistor |
| CN102104249A (en) * | 2009-12-17 | 2011-06-22 | 北京市电力公司 | Lighting-arresting equipment |
| CN202276143U (en) * | 2011-10-14 | 2012-06-13 | 安徽一天电气技术有限公司 | Bus type large-capacity overvoltage protection device |
| CN202586332U (en) * | 2011-09-19 | 2012-12-05 | 北京中科天力电子有限公司 | Strong type large through-flow capacity surge protector |
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2011
- 2011-10-14 CN CN2011103128573A patent/CN103050952A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5023746A (en) * | 1988-12-05 | 1991-06-11 | Epstein Barry M | Suppression of transients by current sharing |
| CN2641884Y (en) * | 2003-06-23 | 2004-09-15 | 上海精达电力稳压器制造有限公司 | Thunder surge protector |
| CN2783496Y (en) * | 2005-02-28 | 2006-05-24 | 张云一 | Combined overvoltage protector with parallel connected gap |
| CN201430437Y (en) * | 2009-06-26 | 2010-03-24 | 成都兴业雷安电子有限公司 | High-capacity pressure-sensitive lightning protection module |
| CN201498988U (en) * | 2009-10-10 | 2010-06-02 | 朱仲彦 | ZnO and SiC compound circuit used for arc extinction, harmony extinction and overvoltage protection |
| CN102104249A (en) * | 2009-12-17 | 2011-06-22 | 北京市电力公司 | Lighting-arresting equipment |
| CN201690231U (en) * | 2010-04-13 | 2010-12-29 | 郭道胜 | Nonlinear neutral point ground resistor |
| CN202586332U (en) * | 2011-09-19 | 2012-12-05 | 北京中科天力电子有限公司 | Strong type large through-flow capacity surge protector |
| CN202276143U (en) * | 2011-10-14 | 2012-06-13 | 安徽一天电气技术有限公司 | Bus type large-capacity overvoltage protection device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110445111A (en) * | 2019-08-02 | 2019-11-12 | 南京南瑞继保电气有限公司 | A kind of magnetic control type paralleling reactor control winding DC bus overvoltage protection system |
| CN114914042A (en) * | 2022-05-07 | 2022-08-16 | 吉林昱丰电气科技有限公司 | High-energy high-residual-voltage-ratio nonlinear resistor disc and parallel circuit |
| CN114914042B (en) * | 2022-05-07 | 2024-02-02 | 吉林昱丰电气科技有限公司 | High-energy high-residual voltage ratio nonlinear resistor and parallel circuit |
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Application publication date: 20130417 |