CN201018279Y - Arc extinguishing and over-voltage protection device - Google Patents
Arc extinguishing and over-voltage protection device Download PDFInfo
- Publication number
- CN201018279Y CN201018279Y CNU2007200345958U CN200720034595U CN201018279Y CN 201018279 Y CN201018279 Y CN 201018279Y CN U2007200345958 U CNU2007200345958 U CN U2007200345958U CN 200720034595 U CN200720034595 U CN 200720034595U CN 201018279 Y CN201018279 Y CN 201018279Y
- Authority
- CN
- China
- Prior art keywords
- phase
- high voltage
- overvoltage
- voltage
- contactor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000006096 absorbing agent Substances 0.000 claims abstract description 15
- 238000010891 electric arc Methods 0.000 abstract description 2
- 239000003990 capacitor Substances 0.000 abstract 2
- 230000005611 electricity Effects 0.000 abstract 1
- 230000001012 protector Effects 0.000 abstract 1
- 230000007935 neutral effect Effects 0.000 description 6
- 230000001629 suppression Effects 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009422 external insulation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to an arc extinguishing and overvoltage protection device, which comprises a high voltage isolating switch, an overvoltage protector, a sub-phrase controlled high voltage vacuum contactor, a high voltage limiting fuse, a micro microcomputer controller and a voltage mutual inductor. The device is internally provided with a sub-phrase resistor-capacitor absorber; the sub-phrase controlled high voltage vacuum controller and sub-phrase resistor-capacitor absorber form the arc extinguishing contactor. The utility model enables the no-slip point of 3 to 305 kV disconnect the ground electricity grid and can effectively limit the overvoltage caused by the single phrase interval electric arc earthing under various operation modes as well as effectively limit the lighting and all operation of overvoltage.
Description
Technical field
The utility model relates to and is used for 3～35KV isolated neutral system, provides a kind of novel extinguishing arc of reliably protecting to add overvoltage protection to the various overvoltage of this class electrical network, particularly single-phase indirect arc grounding surge.
Background technology
In the electrical network of 3～35KV of isolated neutral, except that lightning overvoltage, the most frequent by the overvoltage that single-phase indirect arc ground connection causes, and higher amplitude and long duration are arranged, interior insulation to electric equipment causes the damage of accumulation property, cause clearance to ground to puncture or alternate flashover initiation short circuit accident in the external insulation weak spot, cause zinc oxide arrester blast etc.
At present, for solving the long-time superpotential problem of arc grounding, be still mostly and adopt neutral point of electric network through grounding through arc.But arc suppression coil can not be eliminated the intermittence arcing ground over-voltage fully, amplitude that can not over-voltage, even in some cases, because of the existence of arc suppression coil, arc reignition may just take place constantly at maximum this least favorable of recovery voltage, and the arc grounding overvoltage is raise.Practical operating experiences proves that also in 3～35KV of neutral by arc extinction coil grounding power distribution network, the accident that is caused by arcing ground happens occasionally.For the patent No. is the extinguishing arc measure of 99229228.x, disconnects earthed switch moment, and the transient overvoltage that fault phase bus produces may make the earth point arc reignition, does not only reach the purpose of extinguishing arc, changes permanent earth into by instantaneity ground connection on the contrary.
The utility model content
At the deficiencies in the prior art; the utility model provides a kind of 3～35KV isolated neutral electrical network that makes; under various operational modes; all can effectively limit the overvoltage that single-phase indirect arc ground connection causes, and the extinguishing arc and the overvoltage protection that all can effectively limit thunder and lightning and all kinds of switching overvoltage.
The utility model is achieved through the following technical solutions:
Extinguishing arc and overvoltage protection comprise high-pressure vacuum contactor, high-voltage and current-limitation fuse, microcomputerized controller and voltage transformer that high voltage isolator, overvoltage protection device, phase-splitting are controlled; Be provided with the phase-splitting rc absorber in the device; The high-pressure vacuum contactor and the phase-splitting rc absorber of phase-splitting control are formed the extinguishing arc contactor.
Extinguishing arc and overvoltage protection, the high-pressure vacuum contactor of described phase-splitting control is made up of three single-phase high voltage vacuum contactors; Described phase-splitting rc absorber is made up of the resistance capacitance of three groups of series connection.
Extinguishing arc and overvoltage protection, described three single-phase high voltage vacuum contactors are in parallel with three groups of rc absorbers respectively, and an end is connected to the high voltage isolator lower end by three high-voltage and current-limitation fuses, other end ground connection in parallel.
Design feature of the present utility model is the extinguishing arc contactor that phase-splitting control is set, and this extinguishing arc contactor series connection high-voltage and current-limitation fuse is connected to respectively by high voltage isolator between the bus and ground of protected three-phase three wire system.Described overvoltage protection device is used to limit thunder and lightning and switching manipulation overvoltage.The extinguishing arc contactor of described phase-splitting control is used to eliminate the arc grounding overvoltage.For unsettled intermittence arcing ground over-voltage, device is by the fault phase contact of closed extinguishing arc contactor, making the fault phase voltage is zero, carry out extinguishing arc, the time-delay through setting, allow the dielectric strength of fault point be restored after, the extinguishing arc contactor of open failure phase again, at this moment R-C absorber work, the resume speed and the amplitude of restriction ground connection phase voltage are avoided making the fault resume combustion because of overvoltage.
The utility model can effectively suppress the overvoltage that the single-phase indirect arc ground connection of 3～35KV isolated neutral electrical network causes; the mechanism of its extinguishing arc and overvoltage protection and the size of electric network capacitance and current are irrelevant; thereby the influence that not enlarged by the change of power system operating mode and electrical network; big and small networks all can use; whole device is formed a high-voltage board; simple in structure; volume is little; it is convenient to install, debug; cheap; safe in utilization, can be widely used in the high pressure station-service system in 3～35KV transformer station and power plant, the former system that arc suppression coil is housed is available equally.
Description of drawings
Accompanying drawing is the utility model structural representation.
Embodiment
Shown in accompanying drawing.
Extinguishing arc and overvoltage protection comprise overvoltage protection device 1, extinguishing arc contactor 2, microcomputerized controller 3, voltage transformer 4, phase-splitting rc absorber 5, high-voltage and current-limitation fuse 6, high voltage isolator 7.Overvoltage protection device 1 can hold cell protection device FR1～FR4 and the combinational gap DC that znr constitutes greatly by four and form, four cell protection devices are that star point is formed four stars type structure with combinational gap DC, wherein Samsung is connected to the lower end of high voltage isolator 7 respectively, an other star ground connection; Extinguishing arc contactor 2 is made up of three single-phase high voltage vacuum contactor K and rc absorber 5, and wherein three single-phase high voltage vacuum contactor K rc absorber in parallel 5 backs connect other end ground connection in parallel with three-phase line by high voltage isolator 7; Three single-phase high voltage vacuum contactor K connect with the output control terminal of microcomputerized controller by deciliter coil; Described microcomputerized controller is made of PIC single-chip microcomputer, input and output and display circuit, and its input connects with the secondary output of voltage transformer, and output connects with deciliter coil of three single-phase high voltage vacuum contactors; Primary side one end of voltage transformer is connected to the high-voltage switch gear lower end by three high-tension fuses, the primary side other end of the voltage transformer ground connection that links together; When unstable single-phase arcing ground takes place in system, closed immediately fault phase extinguishing arc contactor, making the fault phase voltage is zero, extinguish arcs.The variation of the three-phase voltage U a that microcomputerized controller 3 provides according to voltage transformer 4, Ub, Uc and residual voltage U0 instantaneous value is judged, and according to the result who judges, send corresponding instruction: if the fault that takes place is a unstable arc ground connection, microcomputerized controller is after judging ground connection separate, send instruction, make the contactor closure of the fault phase of extinguishing arc contactor; Make system be quickly converted to the direct ground connection of stable metallicity by instable arc grounding, the fault phase voltage reduces to zero, electric arc disappears, delay time after the predefined time, the high voltage connector of open failure phase again, the instantaneous overvoltage that disconnects contactor moment generation absorbs restriction by phase-splitting rc absorber 5, and fault can resume combustion.
Claims (3)
1. extinguishing arc and overvoltage protection comprise high-pressure vacuum contactor, high-voltage and current-limitation fuse, microcomputerized controller and voltage transformer that high voltage isolator, overvoltage protection device, phase-splitting are controlled; It is characterized in that: be provided with the phase-splitting rc absorber in the device; The high-pressure vacuum contactor and the phase-splitting rc absorber of described phase-splitting control are formed the extinguishing arc contactor.
2. extinguishing arc according to claim 1 and overvoltage protection is characterized in that the high-pressure vacuum contactor of described phase-splitting control is made up of three single-phase high voltage vacuum contactors; Described phase-splitting rc absorber is made up of the resistance capacitance of three groups of series connection.
3. extinguishing arc according to claim 2 and overvoltage protection; it is characterized in that three single-phase high voltage vacuum contactors are in parallel with three groups of rc absorbers respectively; one end is connected to the high voltage isolator lower end by three high-voltage and current-limitation fuses, other end ground connection in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200345958U CN201018279Y (en) | 2007-02-14 | 2007-02-14 | Arc extinguishing and over-voltage protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200345958U CN201018279Y (en) | 2007-02-14 | 2007-02-14 | Arc extinguishing and over-voltage protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201018279Y true CN201018279Y (en) | 2008-02-06 |
Family
ID=39058779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200345958U Expired - Fee Related CN201018279Y (en) | 2007-02-14 | 2007-02-14 | Arc extinguishing and over-voltage protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201018279Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102457058A (en) * | 2010-10-29 | 2012-05-16 | 徐成飞 | Arc-extinguishing voltage limiting device based on electronic switch |
| CN103715682A (en) * | 2013-10-18 | 2014-04-09 | 合肥南南电力保护设备有限公司 | Capacitive charge release system of buffer arc extinction cabinet |
| CN105140904A (en) * | 2014-06-05 | 2015-12-09 | 国网山西省电力公司电力科学研究院 | Power arc extinguishing system |
| CN106451394A (en) * | 2016-08-28 | 2017-02-22 | 安徽普天电力科技有限公司 | Fixed type overvoltage suppression cabinet |
-
2007
- 2007-02-14 CN CNU2007200345958U patent/CN201018279Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102457058A (en) * | 2010-10-29 | 2012-05-16 | 徐成飞 | Arc-extinguishing voltage limiting device based on electronic switch |
| CN103715682A (en) * | 2013-10-18 | 2014-04-09 | 合肥南南电力保护设备有限公司 | Capacitive charge release system of buffer arc extinction cabinet |
| CN105140904A (en) * | 2014-06-05 | 2015-12-09 | 国网山西省电力公司电力科学研究院 | Power arc extinguishing system |
| CN106451394A (en) * | 2016-08-28 | 2017-02-22 | 安徽普天电力科技有限公司 | Fixed type overvoltage suppression cabinet |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201122840Y (en) | Intelligent neutral point resistance grounding device | |
| CN2817170Y (en) | Arc-resonance extinction route-selecting over voltage protection device | |
| CN201478821U (en) | Three-phase power grid neutral point indirect grounding system overvoltage protection device | |
| CN201018279Y (en) | Arc extinguishing and over-voltage protection device | |
| CN203180517U (en) | Microcomputer arc-extinguishing, harmonic-eliminating and overvoltage-protecting device | |
| CN203180518U (en) | Intelligent switch arc-extinguishing and overvoltage-protecting device | |
| CN201004553Y (en) | Arc over voltage limit for power transmission and distribution system and integrated device for small current grounding and line selection | |
| CN2722487Y (en) | Arc and resonance extinction and overvoltage protector | |
| CN102290805A (en) | Electric arc grounding overvoltage limiting device applied to medium-voltage distribution system | |
| CN104868461A (en) | Intelligent switch arc-extinguishing and overvoltage-protecting device | |
| CN2884641Y (en) | Overvoltage limit and small current earthing selective integrator of power transfer and distribution system | |
| CN206697931U (en) | A kind of arc-extinguishing harmonic-eliminating and overvoltage protection | |
| CN102457058A (en) | Arc-extinguishing voltage limiting device based on electronic switch | |
| CN201887444U (en) | Electric grounding comprehensive protector for TXHPT | |
| CN200953472Y (en) | Electric power transmitting and distributing system arc light over-voltage comprehensive limiting device | |
| CN201388042Y (en) | Central high-voltage switch equal-height cabinet | |
| CN201294378Y (en) | Switch arc-extinguishing and over-voltage protection | |
| CN201191545Y (en) | Switching overvoltage absorption apparatus | |
| CN207282396U (en) | A kind of breaker of high-tension switch gear | |
| CN219477255U (en) | Connection mode of grounding transformer and neutral point resistor cabinet | |
| CN103368165A (en) | Arc elimination and harmonic elimination and overvoltage protector | |
| CN201556938U (en) | Grounding protection device of neutral point of AC generator | |
| CN211790731U (en) | 35KV bus zero-sequence overvoltage protection device of 110KV transformer substation | |
| CN2471004Y (en) | Crowbar device of neutral point directly grounding system | |
| CN204967248U (en) | Prevent protection device of high -pressure generating line short circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: CO-PATENTEE TO: YE MENG ^ |
|
| CU01 | Correction of utility model patent |
Correction item: Co-patentee Correct: Ye Meng Number: 06 Page: The title page Volume: 24 |
|
| CU03 | Correction of utility model patent gazette |
Correction item: Co-patentee Correct: Ye Meng Number: 06 Volume: 24 |
|
| ERR | Gazette correction |
Free format text: CORRECT: CO-PATENTEE; FROM: NONE ^ TO: YE MENG ^ |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080206 |