CN107749613A - A kind of protection device for arrester - Google Patents
A kind of protection device for arrester Download PDFInfo
- Publication number
- CN107749613A CN107749613A CN201711357654.XA CN201711357654A CN107749613A CN 107749613 A CN107749613 A CN 107749613A CN 201711357654 A CN201711357654 A CN 201711357654A CN 107749613 A CN107749613 A CN 107749613A
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- CN
- China
- Prior art keywords
- arrester
- power system
- controller
- protection device
- thermal runaway
- 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.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/008—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for protective arrangements according to this subclass
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- Protection Of Static Devices (AREA)
Abstract
The present invention provides a kind of protection device for arrester, and its chief component includes：Controller, current sensing means and switching device.When performance degradation trend occurs in the process of running in arrester, the protection device can spin off the arrester of performance degradation from power system in time.When arc overvoltage occurs for power system or overvoltage occurs for continuous several times in a short time, the protection device can spin off arrester from power system before thermal runaway occurs for arrester, prevent arrester thermal runaway and trigger more serious electric power accident.
Description
Technical field
The present invention provides a kind of protection device for arrester of field of power, when arc light mistake occurs for power system
When overvoltage occurs for voltage or in a short time continuous several times, the protection device can be before thermal runaway occurs for arrester lightning-arrest
Device spins off from power system；When performance degradation trend occurs in the process of running in arrester, the protection device also can
It is enough that the arrester of performance degradation is spun off from power system in time.
Background technology
In power system, for limit power system overvoltage and zinc oxide surge arresters, conventional arrester have metal oxygen
The forms such as compound arrester, TBP overvoltage protection devices.
When the overvoltage of power system exceedes arrester rated voltage, lightning arrestor movement, there is dash current to flow through lightning-arrest
Device, the energy of system overvoltage is caused to be discharged into by arrester in the earth, then, the voltage of power system recovers normal.But
It is that, when arc overvoltage occurs for power system or switching overvoltage occurs for continuous several times in the short time, arrester can be caused to connect
Continuous action or arrester turn on for a long time, flow through that the duration of the fault current of arrester is longer, when what arrester was born holds
Continuous power attenuation exceedes the heat-sinking capability of overcoat and connector and causes the accumulation of resistor disc temperature in arrester to raise, and finally leads
Cause arrester thermal runaway.
The basic reason of arrester thermal runaway is the overvoltage that recurs of power system, and each dash current, which results in, to be kept away
The temperature rise of thunder device.If before the internal temperature of arrester is not reduced to below safe temperature value, power system is again
Generation overvoltage, arrester internal temperature will be made to continue to raise, after repeated multiple times overvoltage, ultimately result in arrester heat and collapse
Burst.
In the running of arrester, it is possible that arrester performance degradation trend, if can not be by performance degradation
Arrester depart from power system in time, the electric power accidents such as Explosion of on Arrester, power breakdown may be triggered.
The content of the invention
A kind of protection device for arrester provided by the invention, can be to the ginseng such as the electric current of arrester, internal temperature
Number is detected, if the electric current of arrester exceedes its power frequency reference current, judges the set surge arrester failure, and the set is kept away
Thunder device departs from power system.If arrester internal temperature exceedes the normal working temperature upper limit, the set arrester is departed from into electricity
Force system.If arc overvoltage or in a short time continuous several times generation overvoltage occur for power system, protection device
Arrester can be departed from from power system before arrester thermal runaway.
A kind of protection device for arrester provided by the invention, there is communication interface, can by arrester working condition,
The information transfers such as current value, internal temperature values are to the information system on upper strata or the user terminal of other forms.
A kind of protection device for arrester provided by the invention, chief component include：Controller, current detecting
Device and switching device.
The effect of current sensing means is the phase current that detection flows through each phase of arrester.
The effect of switching device is the wire between connection or disconnection arrester and power system, arrester is accessed electric power
System makes arrester depart from power system.Hair switching device of the present invention, which refers to all, can make arrester access power train
The device united or make arrester depart from power system, including breaker, solid switch, solid-state relay, thyristor
Etc. a variety of switch forms.
Controller is handled the signal from current sensing means, if arrester has the temperature of measurement internal temperature
Measuring cell is spent, the internal temperature of arrester can also be measured.Controller is believed according to the arrester phase current collected
Number and arrester interior temperature signal, carry out being opened or closed for manipulation of switches device.
The primary control logic of controller is：According to arrester current signal, the arrester interior temperature signal gathered
（If arrester does not include inside temperature measurement element, arrester interior temperature signal is not gathered）With other coherent signals,
Judge whether arrester performance degradation trend or arrester occurs close to thermal runaway, if arrester occur performance degradation trend or
Arrester then turns off the switching device between arrester lead and power system, in time takes off arrester close to thermal runaway
From power system.
The present invention provides a kind of protection device for arrester, and single set arrester can be controlled, can also be same
When control and have more set arresters on same section of bus.
If there was only a set of arrester on circuit, the protection device is only monitored to this set of arrester, works as generation
During continuous several times overvoltage, the protection device can depart from arrester before arrester thermal runaway from power system.
If there is more set arresters on same section of bus of power system, the protection device can be carried out to more set arresters
Monitor simultaneously, and the access power system of control section arrester（I.e. arrester is in running status）, part arrester depart from electricity
Force system（I.e. arrester is in stand-by state）, when continuous several times overvoltage occurs, control in running order arrester
Depart from power system before thermal runaway occurs, meanwhile, the arrester in stand-by state is accessed into power system, so, both
It can avoid arrester that thermal runaway occurs, ensure that power system has the protection of arrester all the time again.
The present invention provides a kind of protection device for arrester, while has temperature measurement function, if in arrester
There is temperature measurement probe, it is possible to which arrester internal temperature is measured.And can according to the numerical value of arrester internal temperature,
To judge whether to need that arrester spins off from power system.
, can be by institute if the actual act voltage difference of more set arresters on same section of bus of power system is larger
Some arresters all put into operation, and when continuous several times overvoltage occurs, some arresters act, and some arresters are not
The arrester acted can be departed from power system by action, controller before thermal runaway.
Brief description of the drawings
Schematic diagram when Fig. 1 is controller control more set arrester, in figure, 1 is current sensing means, and 2 be switching device.
Schematic diagram when Fig. 2 is controller control single set arrester, in figure, 1 is current sensing means, and 2 be switching device.
Embodiment
Case study on implementation 1：Only control the situation of a set of arrester
As shown in Fig. 2 controller memory storage the associated technical parameters of arrester, including：The power frequency reference current of arrester, keep away
Maximum allowable temperature rise, dash current maximum duration, maximum allowable bump number etc. inside thunder device.Current sensing means
The three-phase phase current of 1 measurement arrester, the switching device 2 in three phase lines of arrester all sentence closure state.
Controller is detected in real time to the phase current signal and arrester interior temperature signal of arrester, if detected
The leakage current of arrester is continued above the power frequency reference current of arrester, then judges the arrester performance degradation, and control disconnection is kept away
Switching device 2 in three phase lines of thunder device, arrester is set to depart from power system.Then, controller transmits to upper strata information system
Relevant information, report arrester have been detached from power system and other relevant informations.
If controller detects that the temperature value inside arrester has exceeded corresponding safe permissible value, controller breaks at once
The switching device 2 in three phase lines of arrester is driven, arrester is departed from power system.Then, controller is to upper strata information system
Related transmitting information, report arrester have been detached from power system and other relevant informations.
When overvoltage occurs for power system, if the voltage peak of overvoltage exceedes the load voltage value of arrester,
Electric current flows through the phase line of arrester, and the phase current of arrester three-phase is conveyed to controller, controller record by current sensing means 1
Preserve the initial time of corresponding dash current, end time, current peak, the electric current number such as current amplitude of different sampling instants
It is believed that breath.If dash current duration of arrester or bump number close to the maximum permissible value of the arrester,
Controller judges that the arrester has thermal runaway danger, turns off the switching device 2 in three phase lines of arrester, makes arrester
Depart from power system.
After arrester flows through dash current, although the dash current duration of arrester and bump number are all remote
Far below the maximum permissible value of the arrester, still, arrester internal temperature values have exceeded corresponding safe permissible value, controller
The switching device 2 in three phase lines of arrester is turned off, arrester is departed from power system.Then, controller is believed to upper strata
Breath system related transmitting information, report arrester have been detached from power system and other relevant informations.
Case study on implementation 2：There is the situation of more set arresters on same section of bus
When there is more set arresters on same section of bus of power system, the protection device can be carried out simultaneously to more set arresters
Monitoring.
In order to more concisely describe the problem, to there is the situation of two sets of arresters on same section of bus of power system
Illustrate.The arrester more than more than 2 sets can be controlled in practice simultaneously.When simultaneously control keeping away more than more than 2 sets
Thunder device, it controls thinking with controlling thinking during 2 sets of arresters identical simultaneously.
As shown in Figure 2：
Controller memory storage the associated technical parameters of each set arrester, including：The power frequency reference current of all arresters, keep away
Maximum allowable temperature rise, dash current maximum duration, maximum allowable bump number etc. inside thunder device.
For the ease of description, for spy it is assumed that at first, the switching device 2 of first set arrester is in closure state,
The switching device 2 of second set of arrester is off.
Controller is detected in real time to the phase current signal and arrester interior temperature signal of all arresters, controller
If detecting that the leakage current of first set arrester is continued above the power frequency reference current of first set arrester, judge that this is lightning-arrest
Device performance degradation, then controller the switching device 2 in second set of arrester, three phase lines is closed at once, make second set of arrester
Access power system.Then, the switching device 2 in three phase lines of first set arrester is turned off, takes off first set arrester
From power system.Then, controller is to upper strata information system related transmitting information.
If controller detects that the temperature value inside first set arrester has exceeded corresponding safe permissible value, control
Device at once closes the switching device 2 in second set of arrester, three phase lines, makes second set of arrester access power system.So
Afterwards, the switching device 2 in three phase lines of first set arrester is turned off, first set arrester is departed from power system.Then,
Controller is to upper strata information system related transmitting information.
When overvoltage occurs for power system, if the voltage peak of overvoltage exceedes the load voltage value of arrester,
Electric current flows through the phase line of first set arrester, and current sensing means 1 corresponding to first set arrester is by first set arrester three-phase
Phase current be conveyed to controller, controller record preserves initial time, end time, the current peak of corresponding dash current
Value, the current data information such as current amplitude of different sampling instants.If the dash current duration of first set arrester or
Bump number close to the arrester maximum permissible value, then controller judge first set arrester exist thermal runaway danger,
Then controller at once closes the device of switch 2 in second set of arrester, three phase lines, makes second set of arrester access power train
System.Then, the switching device 2 in three phase lines of first set arrester is turned off, first set arrester is departed from power system.
Then, controller is to upper strata information system related transmitting information.
Claims (4)
1. the present invention provides a kind of protection device for arrester, it is characterised in that：When arc overvoltage occurs for power system
Or in a short time continuous several times occur overvoltage when, the protection device can arrester occur thermal runaway before arrester from
Spun off in power system, prevent arrester thermal runaway and trigger more serious electric power accident；When arrester is in running
In when there is performance degradation trend, the protection device can detach the arrester of performance degradation from power system in time
Come.
A kind of 2. protection device for arrester according to claim 1, it is characterised in that：It is a kind of for arrester
Protection device, its chief component include：Controller, current sensing means and switching device；The main function of controller is
According to arrester phase current signal, the arrester interior temperature signal gathered（If arrester does not include inside temperature measurement
Element, then arrester interior temperature signal is not gathered）With other coherent signals, judge whether arrester performance degradation trend occurs
Or arrester, if arrester performance degradation trend or arrester occurs close to thermal runaway, is turned off and kept away close to thermal runaway
Switching device between thunder device lead and power system, departs from power system by arrester in time；The effect of current sensing means
It is that the phase current for flowing through arrester is detected, and coherent signal is conveyed to controller；Switching device, which refers to be arranged on, to be kept away
Switch between thunder device lead and power system, it is that closure by changing switching device or off-state are kept away to control that it, which is acted on,
Thunder device accesses power system or departs from power system.
A kind of 3. protection device for arrester according to claim 1, it is characterised in that：Its controller can be independent
A set of arrester is controlled, more set arresters on same section of bus can also be controlled simultaneously；When controller individually controls a set of keep away
During thunder device, controller according to the signal collected, judge arrester whether performance degradation or close to thermal runaway state, so as to
Arrester is departed from into power system in time；When controller controls more set arresters on same section of bus simultaneously, first, control
Device allows a part of arrester to access power system, allow another part arrester to depart from power system, when keeping away for access power system
Thunder device there is performance degradation or in the short time continuous several times overvoltage and close to during thermal runaway, controller allows at once original departs from electricity
The arrester access power system of Force system, and performance degradation or the arrester disengaging power train close to thermal runaway are will appear from simultaneously
System.
A kind of 4. protection device for arrester according to claim 1, it is characterised in that：Its controller has communication
Interface, the information such as the parameters such as the electric current detected, temperature and arrester running status can be sent to upper layer information management system
The user terminal of system or other forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711357654.XA CN107749613A (en) | 2017-12-17 | 2017-12-17 | A kind of protection device for arrester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711357654.XA CN107749613A (en) | 2017-12-17 | 2017-12-17 | A kind of protection device for arrester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107749613A true CN107749613A (en) | 2018-03-02 |
Family
ID=61250157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711357654.XA Pending CN107749613A (en) | 2017-12-17 | 2017-12-17 | A kind of protection device for arrester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107749613A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06283315A (en) * | 1993-03-26 | 1994-10-07 | Ngk Insulators Ltd | Lightning arrestor device |
| CN101064430A (en) * | 2007-05-08 | 2007-10-31 | 桂林工学院 | Intelligent power arrester |
| CN103155311A (en) * | 2010-10-04 | 2013-06-12 | 凤凰通讯两合有限公司 | Surge protection device |
| CN203337759U (en) * | 2013-07-12 | 2013-12-11 | 常州顺创电气科技有限公司 | Online state monitoring system for MOAs (metal oxide arresters) for power transmission line |
| CN103633636A (en) * | 2013-11-08 | 2014-03-12 | 国家电网公司 | Lightning arrester degradation protection device |
| CN204613333U (en) * | 2015-05-25 | 2015-09-02 | 国家电网公司 | A kind of arrester detecting device for electric system |
| CN105372540A (en) * | 2015-12-21 | 2016-03-02 | 河海大学常州校区 | Performance on-line monitoring device for power distribution switch cabinet lightning arrester and monitoring method thereof |
-
2017
- 2017-12-17 CN CN201711357654.XA patent/CN107749613A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06283315A (en) * | 1993-03-26 | 1994-10-07 | Ngk Insulators Ltd | Lightning arrestor device |
| CN101064430A (en) * | 2007-05-08 | 2007-10-31 | 桂林工学院 | Intelligent power arrester |
| CN103155311A (en) * | 2010-10-04 | 2013-06-12 | 凤凰通讯两合有限公司 | Surge protection device |
| CN203337759U (en) * | 2013-07-12 | 2013-12-11 | 常州顺创电气科技有限公司 | Online state monitoring system for MOAs (metal oxide arresters) for power transmission line |
| CN103633636A (en) * | 2013-11-08 | 2014-03-12 | 国家电网公司 | Lightning arrester degradation protection device |
| CN204613333U (en) * | 2015-05-25 | 2015-09-02 | 国家电网公司 | A kind of arrester detecting device for electric system |
| CN105372540A (en) * | 2015-12-21 | 2016-03-02 | 河海大学常州校区 | Performance on-line monitoring device for power distribution switch cabinet lightning arrester and monitoring method thereof |
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Application publication date: 20180302 |