CN201008096Y - Arc extinguishing compensation mechanism for neutral point non-effective earthing power network - Google Patents
Arc extinguishing compensation mechanism for neutral point non-effective earthing power network Download PDFInfo
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- CN201008096Y CN201008096Y CNU2006200493565U CN200620049356U CN201008096Y CN 201008096 Y CN201008096 Y CN 201008096Y CN U2006200493565 U CNU2006200493565 U CN U2006200493565U CN 200620049356 U CN200620049356 U CN 200620049356U CN 201008096 Y CN201008096 Y CN 201008096Y
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- 230000007935 neutral effect Effects 0.000 title claims abstract description 18
- 230000001629 suppression Effects 0.000 claims description 35
- 230000008033 biological extinction Effects 0.000 claims description 25
- 239000002184 metal Substances 0.000 claims description 10
- 238000011084 recovery Methods 0.000 claims description 6
- 230000001012 protector Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 4
- 238000010891 electric arc Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 235000019800 disodium phosphate Nutrition 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000011982 device technology Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
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Abstract
The utility model relates to an arc extinguishing compensating device of neutral point unproductive earthling electric network, which comprises a normal open contact which is bridged at the high voltage switch between every buss of the electric network three phase and three wire system and ground, a ground fault neutralizer component of normal open switch and ground fault neutralizer and an intelligent controller, wherein the normal open switch and ground fault neutralizer are connected in series between the middle point of the three phase and three wire system and ground, the input end of the intelligent controller is electrically connected with a mutual sensor of the three phase and three wire system, the output end of the intelligent controller is connected with the normal open switch of the high voltage switch ad ground fault neutralizer component. When buss of a certain phase is arc light earthling, the intelligent controller controls the normal switch of the high voltage switch and the ground fault neutralizer component and closes normal open contact of the high voltage switch corresponding to the bush and closes the normal open switch after setting time to connect middle point of the three phase and three wire system and ground fault neutralizer.
Description
Technical field
The utility model relates to a kind of arc extinction compensation device, relates in particular to the arc extinction compensation device of the electric power network that is used for neutral non-effective grounding.
Background technology
When in the neutral point indirect earthing electric power network, single-phase arcing ground being taken place, can produce the arc grounding overvoltage, cause destruction, might cause major accidents such as short circuit equipment and line insulation.In order to solve the problems of the technologies described above, following solution is arranged at present.
(1) scheme of employing arc suppression coil compensation
1. this scheme has following advantage
Because the inductive current of arc suppression coil has compensated capacitance current, earth current diminishes, and makes that the electric arc of fault point may be from horizontal blanking.
2. this scheme has following shortcoming:
(1) arc suppression coil has obvious effects for the supply network based on overhead transmission line, but can not bring into play obvious effect for the supply network based on cable line.
(2) arc suppression coil can't alleviate the destruction of hf electric arc electric current to the fault point.
(3) be provided with route selection sensitivity is reduced, even can't route selection.
(4) because the operation principle of arc suppression coil (automatic tracking compensating device) no matter be to mend or owe to mend, is easy to produce system resonance when system's normal running.
(2) arcing ground is converted into apace the scheme of metal ground connection
1. this scheme has following advantage:
When in the neutral point indirect earthing electric power network, single-phase arcing ground being taken place,, then can obtain following effect if fault phase arcing ground can be converted into metal ground connection apace:
(1) because fault directly is connected with ground mutually, and voltage to earth equals zero, power frequency arc and hf electric arc all will extinguish immediately;
(2) after the metal ground connection, the overvoltage that non-fault goes up mutually is stabilized in 1.73 times of normal operation phase voltage immediately, and the equipment in the electric power network can safe operation under this voltage;
(3) because electric arc is extinguished, and overvoltage is limited in lsafety level, fault can not continue development again, for user's grid switching operation has won the time, avoids causing and is forced to have a power failure.
2. this scheme has following shortcoming:
(1) this scheme can not be used for the electric power network that generator is arranged, when generator generation stator grounding, very big short circuit current will be produced after certain is become metal ground connection mutually.
(2) be not suitable for using this scheme for the electric power network that capacitance current is had strict demand, because this scheme is to reach by the capacitance current that shifts earth point to extinguish arc light, suppress superpotential effect, but do not have the building-out capacitor electric current, whole capacitance currents of electric power network still exist, and flow through artificial metal earth point.
The utility model content
The utility model proposes in order to solve the problems of the technologies described above, and this utility model has been abandoned the viewpoint that traditional arc suppression coil and present metal ground connection arc-extinction device technology are refuted mutually.
The arc extinction compensation device that is used for the electric power network of neutral non-effective grounding of the present utility model comprises:
The normally open contact cross-over connection is in each phase bus of the three-phase three wire system of described electric power network and the high-voltage switch gear between the ground;
The arc suppression coil assembly that comprises normal open switch and arc suppression coil, wherein, described normal open switch and arc suppression coil are connected in series between the neutral point and ground of described three-phase three wire system; And
Intelligent controller, its input is electrically connected with the output of the voltage transformer of three-phase three wire system, and its output is electrically connected with normal open switch in described high-voltage switch gear and the arc suppression coil assembly,
When certain phase bus generation arc grounding, the normal open switch of intelligent controller control high-voltage switch gear and arc suppression coil assembly, the normally open contact of closed and this high-voltage switch gear that bus is corresponding mutually, and behind setting-up time closed normal open switch, the neutral point of three-phase three wire system is electrically connected with arc suppression coil.
The arc extinction compensation device that is used for the electric power network of neutral non-effective grounding of the present utility model has been integrated the advantage of prior art scheme, and has remedied both shortcomings.Adopt the technical solution of the utility model, can provide a kind of both quick, reliable, effective, thorough, again Jing Ji arc extinction compensation device.
Description of drawings
Fig. 1 is the theory diagram of the arc extinction compensation device of the electric power network that is used for neutral non-effective grounding of the present utility model.
Embodiment
Below, 1 specify enforcement of the present utility model with reference to the accompanying drawings.
Arc extinction compensation device 1 shown in Figure 1 comprises: voltage transformer 6, high-voltage switch gear 2, intelligent controller 5, and arc suppression coil assembly 3.Described high-voltage switch gear 2 comprises three single-phase high voltage K switch 1, K2, K3, and respectively cross-over connection is between the three-phase bus and ground of the electric power network of neutral non-effective grounding, and closure when this arc grounding takes place mutually overvoltage is arranged is used for eliminating overvoltage.Described arc suppression coil assembly 3 comprises arc suppression coil 4 and is serially connected in the neutral point of electric power network of three-phase three wire system and the normal open switch K4 between the arc suppression coil 4, arc suppression coil 4 can be fixed inductance value or adjust the device of inductance value automatically by microcomputer, arc suppression coil 4 is used for the capacitance current behind the compensation of ground.The signal of described intelligent controller 5 is taken from voltage transformer 6, also can get the signal of the zero sequence current mutual inductor of generator 11 outlets in the electrical network that straight allocation motor 11 is arranged.Be connected between the arc extinction compensation device 1 of the present utility model, each phase bus that can also be included in described three-phase three wire system and ground, cross-over connection has the combination overvoltage protector 9 that is connected in series and is constituted by discharging gap 7 and high energy voltage limiter 8 respectively.Described combination overvoltage protector 9 is used for limiting switching overvoltage and arc overvoltage in short-term, less energy.
Arc extinction compensation device 1 of the present utility model can also possess Alarm Unit (not shown), and when certain phase bus generation arc grounding, described intelligent controller sends control signal to Alarm Unit, makes described Alarm Unit send alarm signal.
The described high-voltage switch gear of arc extinction compensation device 1 of the present utility model can be the high-voltage alternating contactor.
The intelligent controller 5 of arc extinction compensation device 1 of the present utility model also can received current instrument transformer 10 signal.
Intelligent controller 5 when ground connection of different nature takes place in electrical network, realize in the following manner high-voltage switch gear 2 and with the cooperating of the action of arc suppression coil assembly 3.
1, arc grounding
(1) when electric power network generation arc grounding, intelligent controller 5 is given an order rapidly high-voltage switch gear 2 closures of corresponding phase, and making the arc light phase voltage is zero, the fault point arc light is extinguished over-voltage;
(2) intelligent controller 5 makes the normal open switch K4 closure in the arc suppression coil assembly 3 after the time through setting, and drops into arc suppression coil 4, and capacitance current is compensated, and the earth point electric current is diminished, and makes electric power network safer;
(3) intelligent controller 5 is set with automatic recovery time, and arc extinction compensation device 1 recovers automatically after automatic recovery time, disconnects the normal open switch K4 of corresponding high-voltage switch gear 2 and arc suppression coil assembly 3;
(4) in these cases, also can make the Alarm Unit in the arc extinction compensation device 1 send alarm signal.
2, metal ground connection
(1) when electric power network generation metal ground connection, the normal open switch K4 closure in the time command arc suppression coil assembly 3 of intelligent controller 5 through setting drops into arc suppression coil 4, and capacitance current is compensated.At this moment, high-voltage switch gear 2 is failure to actuate.
(2) intelligent controller 5 is set with automatic recovery time, and arc extinction compensation device 1 recovers automatically after automatic recovery time, cut-off breaker K4;
(3) in these cases, also can make arc extinction compensation device 1 send alarm signal simultaneously.
3, generator unit stator single-phase earthing
(1) signal that can obtain according to the zero sequence current mutual inductor of generator 11 outlet of intelligent controller 5, judge whether generator generation stator grounding, if stator grounding has taken place in generator, intelligent controller 5 is the normal open switch K4 closure in the instruction arc suppression coil assembly 3 after the time through setting, and drops into arc suppression coil 4.At this moment, high-voltage switch gear 2 is failure to actuate.
(2) in these cases, also can make arc extinction compensation device 1 send alarm signal simultaneously.
4, voltage transformer 6 broken strings
When electric power network generation voltage transformer 6 broken strings, intelligent controller 5 only sends alarm signal.
Intelligent controller 5 can adopt two CPU work, and host CPU adopts 32 bit DSPs, utilizes the data-handling capacity fast and accurately of DSP to realize Fourier analysis, and its choosing is mutually accurate.By voltage transformer three-phase voltage and frequency, and,, discern exactly: arc grounding, metal ground connection, generator unit stator single-phase earthing, voltage transformer 6 broken strings the rapid analysis of the various ground states energy of electrical network in conjunction with electric power network bus three-phase voltage.Make the relevant device action according to customer requirements, guarantee that the electric power network power supply is reliable.This device has compatible high, can be used for the power supply of various complexity.
All the elements of above-mentioned explanation are only of the present utility model for example, and those of ordinary skill in the art can carry out various modifications under the situation that does not break away from scope disclosed in the utility model.
Claims (8)
1. an arc extinction compensation device that is used for the electric power network of neutral non-effective grounding is characterized in that, comprising:
The normally open contact cross-over connection is in each phase bus of the three-phase three wire system of described electric power network and the high-voltage switch gear between the ground;
The arc suppression coil assembly that comprises normal open switch and arc suppression coil, wherein, described normal open switch and arc suppression coil are connected in series between the neutral point and ground of described three-phase three wire system; And
Intelligent controller, its input is electrically connected with the output of the voltage transformer of three-phase three wire system, and its output is electrically connected with normal open switch in described high-voltage switch gear and the arc suppression coil assembly,
When certain phase bus generation arc grounding, the normal open switch of intelligent controller control high-voltage switch gear and arc suppression coil assembly, the normally open contact of closed and this high-voltage switch gear that bus is corresponding mutually, and behind setting-up time closed normal open switch, the neutral point of three-phase three wire system is electrically connected with arc suppression coil.
2. arc extinction compensation device according to claim 1 is characterized in that,
When certain phase bus generation metal ground connection, intelligent controller control normal open switch, closed normal open switch behind setting-up time is electrically connected the neutral point of three-phase three wire system with arc suppression coil.
3. arc extinction compensation device according to claim 1 is characterized in that,
The input of intelligent controller also is electrically connected with the output of the zero sequence current mutual inductor of generator outlet.
4. arc extinction compensation device according to claim 3 is characterized in that,
When certain phase bus generation generator stator ground, intelligent controller control normal open switch, closed normal open switch behind setting-up time is electrically connected the neutral point of three-phase three wire system with arc suppression coil.
5. arc extinction compensation device according to claim 1 is characterized in that,
Described intelligent controller is set with automatic recovery time, disconnects the normally open contact of corresponding high-voltage switch gear and the normal open switch of arc suppression coil assembly after automatic recovery time.
6. arc extinction compensation device according to claim 1; it is characterized in that, be connected between each the phase bus that also is included in described three-phase three wire system and the ground, cross-over connection has the combination overvoltage protector that is connected in series and is constituted by discharging gap and high energy voltage limiter respectively.
7. arc extinction compensation device according to claim 1 is characterized in that, also possesses Alarm Unit, and when certain phase bus generation arc grounding, described intelligent controller sends control signal to Alarm Unit, makes described Alarm Unit send alarm signal.
8. arc extinction compensation device according to claim 1 is characterized in that, described high-voltage switch gear three alternate lockings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200493565U CN201008096Y (en) | 2006-12-22 | 2006-12-22 | Arc extinguishing compensation mechanism for neutral point non-effective earthing power network |
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| CNU2006200493565U CN201008096Y (en) | 2006-12-22 | 2006-12-22 | Arc extinguishing compensation mechanism for neutral point non-effective earthing power network |
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| CN201008096Y true CN201008096Y (en) | 2008-01-16 |
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| CNU2006200493565U Expired - Fee Related CN201008096Y (en) | 2006-12-22 | 2006-12-22 | Arc extinguishing compensation mechanism for neutral point non-effective earthing power network |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684182A (en) * | 2012-05-29 | 2012-09-19 | 广州智光电气股份有限公司 | Arc extinction grounding device |
| CN103050962A (en) * | 2011-10-14 | 2013-04-17 | 安徽一天电气技术有限公司 | Grounding transfer current detection compensation device and working method thereof |
| CN103050963A (en) * | 2011-10-14 | 2013-04-17 | 安徽一天电气技术有限公司 | Arc extinguish device capable of avoiding direct grounding arc extinguish and overvoltage resetting, and working method thereof |
| CN103346717A (en) * | 2013-07-19 | 2013-10-09 | 国家电网公司 | Method for preventing generator stator ground protection malfunction at grid side failure time |
| CN103364665A (en) * | 2013-07-19 | 2013-10-23 | 国家电网公司 | A detection method for finding the cause of faulty generator stator grounding protection malfunction on the grid side |
| CN116154716A (en) * | 2022-12-30 | 2023-05-23 | 安徽正广电电力技术有限公司 | Active intervention method and device for quickly converting arc grounding into metal grounding |
-
2006
- 2006-12-22 CN CNU2006200493565U patent/CN201008096Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103050962A (en) * | 2011-10-14 | 2013-04-17 | 安徽一天电气技术有限公司 | Grounding transfer current detection compensation device and working method thereof |
| CN103050963A (en) * | 2011-10-14 | 2013-04-17 | 安徽一天电气技术有限公司 | Arc extinguish device capable of avoiding direct grounding arc extinguish and overvoltage resetting, and working method thereof |
| CN102684182A (en) * | 2012-05-29 | 2012-09-19 | 广州智光电气股份有限公司 | Arc extinction grounding device |
| CN102684182B (en) * | 2012-05-29 | 2014-10-08 | 广州智光电气股份有限公司 | Arc extinction grounding device |
| CN103346717A (en) * | 2013-07-19 | 2013-10-09 | 国家电网公司 | Method for preventing generator stator ground protection malfunction at grid side failure time |
| CN103364665A (en) * | 2013-07-19 | 2013-10-23 | 国家电网公司 | A detection method for finding the cause of faulty generator stator grounding protection malfunction on the grid side |
| CN103346717B (en) * | 2013-07-19 | 2015-08-12 | 国家电网公司 | The method of generator stator ground protection misoperation during prevention grid side fault |
| CN103364665B (en) * | 2013-07-19 | 2015-11-18 | 国家电网公司 | Detection method for searching power grid side fault generator stator grounding protection maloperation reason |
| CN116154716A (en) * | 2022-12-30 | 2023-05-23 | 安徽正广电电力技术有限公司 | Active intervention method and device for quickly converting arc grounding into metal grounding |
| CN116154716B (en) * | 2022-12-30 | 2023-09-05 | 安徽正广电电力技术有限公司 | Active intervention method and device for quickly converting arc grounding into metal grounding |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ANHUI YITIAN ELECTRICAL APPLIANCE TECHNOLOGY CO., Free format text: FORMER OWNER: DING ZHANGSHUAI Effective date: 20091106 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20091106 Address after: Daoxiang road Hefei city Shushan new industrial park in Anhui province No. 88, zip code: 230031 Patentee after: Anhui Yitian Electrical Technology Co., Ltd. Address before: No. 18, Shunyi Road, Shanghai, 5 floor, zip code: 200063 Patentee before: Ding Zhangshuai |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080116 Termination date: 20141222 |
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| EXPY | Termination of patent right or utility model |