CN105334406A - Fault detection method and device and fault indicator of lightning arrester - Google Patents
Fault detection method and device and fault indicator of lightning arrester Download PDFInfo
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- CN105334406A CN105334406A CN201410387097.6A CN201410387097A CN105334406A CN 105334406 A CN105334406 A CN 105334406A CN 201410387097 A CN201410387097 A CN 201410387097A CN 105334406 A CN105334406 A CN 105334406A
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Abstract
The invention discloses a fault detection method and device and a fault indicator of a lightning arrester. The fault detection method comprises that the grounding current of a grounding downlead of the lightning arrester is detected; delayed time of the grounding current is obtained; whether the grounding current is greater than a preset current value and the delayed time is greater than preset time are determined; and when the grounding current is greater than the preset current value and the delayed time is greater than the preset time, a fault of the lightning arrester is prompted. Through the method, device and indicator, the problem that detection for the fault lightning arrest is long in time in the prior art is solved, and the fault lightning arrester can be timely detected.
Description
Technical field
The present invention relates to field of power detection, in particular to a kind of fault detection method of lightning arrester, device and indicating fault instrument.
Background technology
In 10kv distribution line, run a large amount of lightning arrester, along with running the increase of the time limit and quality problems own, often there is breakdown accident and causing singlephase earth fault in this lightning arrester.Because lightning arrester crust wraps up one deck silicon rubber, after puncturing, track walker is difficult to when walkaround inspection find fault lightning arrester, cause the time of looking up the fault point longer, because breakdown fault can cause power distribution network to have a power failure, need to step on bar one by one and check fault lightning arrester, increase trouble shooting time, power supply reliability is had a greatly reduced quality, too increases the potential safety hazard of malfunction elimination personnel.
For checking the problem that the time of fault lightning arrester is longer in prior art, at present effective solution is not yet proposed.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of fault detection method of lightning arrester, device and indicating fault instrument, to solve in prior art the problem checking that the time of fault lightning arrester is longer.
To achieve these goals, according to an aspect of the present invention, a kind of fault detection method of lightning arrester is provided.Fault detection method according to lightning arrester of the present invention comprises: the ground current detecting the down conductor of lightning arrester; Obtain the delay time of described ground current; Judge whether described ground current is greater than pre-set current value, and described delay time is greater than Preset Time; And when described ground current is greater than described pre-set current value and described delay time is greater than described Preset Time, point out described surge arrester failure.
Further, before the delay time obtaining described ground current, described fault detection method also comprises: amplify described ground current.
Further, when described ground current is greater than described pre-set current value and described delay time is greater than described Preset Time, point out described surge arrester failure to comprise: flash warning and/or board turning instruction to point out described surge arrester failure.
Further, when described ground current is greater than described pre-set current value and described delay time is greater than described Preset Time, after pointing out described surge arrester failure, described fault detection method also comprises: record sends the time of the prompting of described surge arrester failure; Judge whether current time meets the mistiming pre-set with the mistiming of the time sending described surge arrester failure; And when described current time meets with the mistiming of the time sending described surge arrester failure the mistiming pre-set, again detect described ground current.
To achieve these goals, according to a further aspect in the invention, a kind of failure detector of lightning arrester is provided.Failure detector according to lightning arrester of the present invention comprises: detecting unit, for detecting the ground current of the down conductor of lightning arrester; Acquiring unit, for obtaining the delay time of described ground current; First judging unit, for judging whether described ground current is greater than pre-set current value, and described delay time is greater than Preset Time; And Tip element, for when described ground current is greater than described pre-set current value and described delay time is greater than described Preset Time, point out described surge arrester failure.
Further, described failure detector also comprises: amplifying unit, for before the delay time obtaining described ground current, amplifies described ground current.
Further, described Tip element comprises: alarm module, for flash warning and/or board turning instruction to point out described surge arrester failure.
Further, described failure detector also comprises: record cell, for when described ground current is greater than described pre-set current value and described delay time is greater than described Preset Time, after pointing out described surge arrester failure, record sends the time of the prompting of described surge arrester failure; Second judging unit, for judging whether current time meets the mistiming pre-set with the mistiming of the time sending described surge arrester failure; Reset unit, for when described current time meets with the mistiming of the time sending described surge arrester failure the mistiming pre-set, detects described ground current again.
To achieve these goals, according to another aspect of the invention, a kind of indicating fault instrument of lightning arrester is provided.Indicating fault instrument according to lightning arrester of the present invention comprises: straight-through current transformer, for detecting the ground current of the down conductor of lightning arrester; Delay circuit, is connected with described straight-through current transformer, for detecting the delay time of described ground current; Warning circuit, for when judging that described ground current is greater than pre-set current value and described delay time is greater than Preset Time, sends the alarm of described surge arrester failure.
Further, described indicating fault instrument also comprises: current amplifier, is arranged between described straight-through current transformer and described delay circuit, for amplifying described ground current.
Further, described warning circuit comprises: flash alarm circuit, reports to the police for flashing to point out described surge arrester failure; And/or board turning indicating circuit, for sending board turning instruction to point out described surge arrester failure.
Further, described indicating fault instrument also comprises: functional reduction circuit, for resetting to described indicating fault instrument.
By the present invention, adopt the ground current of the down conductor detecting lightning arrester; Obtain the delay time of ground current; Judge whether ground current is greater than pre-set current value, and delay time is greater than Preset Time; And when ground current is greater than pre-set current value and delay time is greater than Preset Time, the method for prompting surge arrester failure, solves in prior art the problem checking that the time of fault lightning arrester is longer, and then reaches the effect being checked through fault lightning arrester in time.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the process flow diagram of the fault detection method of lightning arrester according to the embodiment of the present invention;
Fig. 2 is the schematic diagram of the failure detector of lightning arrester according to the embodiment of the present invention; And
Fig. 3 is the schematic diagram of the fault locator of lightning arrester according to the embodiment of the present invention.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
The present invention program is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
It should be noted that, term " first ", " second " etc. in instructions of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged in the appropriate case, so as embodiments of the invention described herein can with except here diagram or describe those except order implement.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
Embodiments provide a kind of fault detection method of lightning arrester.
Fig. 1 is the process flow diagram of the fault detection method of lightning arrester according to the embodiment of the present invention.As shown in the figure, the fault detection method of this lightning arrester comprises the steps:
Step S102, detects the ground current of the down conductor of lightning arrester.
Step S104, obtains the delay time of ground current.
Step S106, judge whether ground current is greater than pre-set current value, and delay time is greater than Preset Time.And
Step S108, when ground current is greater than pre-set current value and delay time is greater than Preset Time, prompting surge arrester failure.
Being struck by lightning and after puncturing, having electric current by the down conductor of lightning arrester and pass through, now can judged that whether lightning arrester is breakdown by detecting ground current.In order to improve the accuracy of judgement, after ground current being detected, judge the delay time of ground current, delay time has ground current to flow through to start the time not having electric current to flow through in down conductor in down conductor.Determine that this electric current is by the electric current of generation after puncturing when ground current is greater than pre-set current value, if can judge that delay time is greater than Preset Time further, then determine that the ground current of the down conductor of lightning arrester really punctures lightning arrester by thunder and lightning and causes, improve the accuracy of judgement.
If ground current is greater than pre-set current value and delay time is greater than Preset Time, then send the prompting of surge arrester failure, send out into fault with this lightning arrester of cue circuit testing staff.Such as, when detecting that hungry electric current is greater than 1A, delay time sent alarm after 2 seconds.
Pass through above-described embodiment, the time detecting the ground current and ground current flowing through the down conductor of lightning arrester judges that whether lightning arrester is breakdown, when determining that lightning arrester sends information to point out this lightning arrester breakdown after breakdown, being convenient to line attendant and finding trouble spot.Ground current can be detected at the down conductor of lightning arrester after lightning arrester is breakdown, in order to improve the accuracy of detection, avoid wrong report, delay time is detected again after ground connection electric power being detected, integrated ground electric current and delay time determination lightning arrester breakdown, and after detecting and checking the time of fault lightning arrester longer breakdown, send information in time, thus solve in prior art the problem checking that the time of fault lightning arrester is longer, and then reach the effect finding fault lightning arrester fast.
Preferably, before the delay time obtaining ground current, fault detection method also comprises: amplify ground current.
The inaccurate problem of the judgement caused in order to avoid electric current is too small, after ground current being detected, can amplify ground current, utilizes the electric current amplified to drive suggestion device to send information.
Alternatively, when ground current is greater than pre-set current value and delay time is greater than Preset Time, prompting surge arrester failure comprise: flash warning and/or board turning instruction to point out surge arrester failure.
Prompting surge arrester failure can by warning and/or the board turning instruction of flashing, flashing light alarm is convenient to circuit patrolman and is observed fault lightning arrester, board turning instruction can send radiofrequency signal, cue receiving end lightning arrester breaks down, can the information such as position of remote reporting fault lightning arrester, facilitate malfunction elimination personnel to lock rapidly fault lightning arrester, in time the normal operation recovering power distribution network is processed to fault lightning arrester, ensure that the stability that power distribution network runs and security.
Alternatively, when ground current is greater than pre-set current value and delay time is greater than Preset Time, after prompting surge arrester failure, fault detection method also comprises: record sends the time of the prompting of surge arrester failure.Judge whether current time meets the mistiming pre-set with the mistiming of the time sending surge arrester failure.When current time meets with the mistiming of the time sending surge arrester failure the mistiming pre-set, again detect ground current.
After the prompting sending surge arrester failure, the time that record lightning arrester breaks down, the time and current time whether satisfied mistiming of presetting of breaking down can be detected at interval of certain hour, whether the time also can detecting current time and record in real time meets the mistiming of presetting with the time of breaking down, if meet the mistiming of presetting, then again detect lightning arrester whether fault.
Such as, be 24 constantly little when the mistiming of the time that lightning arrester breaks down and current time, again detect ground current and whether be greater than pre-set current value.
By above-described embodiment, setting detects the time of ground current again, can give line attendant time enough and process fault lightning arrester, again detects ground current and whether breakdown fault occurs again to detect lightning arrester after fault is processed.Thus at quick position to fault lightning arrester, the safety and stability of whole power distribution network can also be ensured.
Present invention also offers a kind of failure detector of lightning arrester.
The failure detector of the lightning arrester that the fault detection method of the lightning arrester of the embodiment of the present invention can be provided by the embodiment of the present invention performs, and the failure detector of the lightning arrester of the embodiment of the present invention also may be used for the fault detection method performing the lightning arrester that the embodiment of the present invention provides.
Fig. 2 is the schematic diagram of the failure detector according to the embodiment of the present invention.As shown in the figure, the failure detector of this lightning arrester comprises: detecting unit 10, acquiring unit 20, first judging unit 30 and Tip element 40.
Detecting unit 10 is for detecting the ground current of the down conductor of lightning arrester.
Acquiring unit 20 is for obtaining the delay time of ground current.
First judging unit 30 is for judging whether ground current is greater than pre-set current value, and delay time is greater than Preset Time.
Tip element 40, for when ground current is greater than pre-set current value and delay time is greater than Preset Time, points out surge arrester failure.
Being struck by lightning and after puncturing, having electric current by the down conductor of lightning arrester and pass through, now can judged that whether lightning arrester is breakdown by detecting ground current.In order to improve the accuracy of judgement, after ground current being detected, judge the delay time of ground current, delay time has ground current to flow through to start the time not having electric current to flow through in down conductor in down conductor.Determine that this electric current is by the electric current of generation after puncturing when ground current is greater than pre-set current value, if can judge that delay time is greater than Preset Time further, then determine that the ground current of the down conductor of lightning arrester really punctures lightning arrester by thunder and lightning and causes, improve the accuracy of judgement.
If ground current is greater than pre-set current value and delay time is greater than Preset Time, then send the prompting of surge arrester failure, send out into fault with this lightning arrester of cue circuit testing staff.Such as, when detecting that hungry electric current is greater than 1A, delay time sent alarm after 2 seconds.
Pass through above-described embodiment, the time detecting the ground current and ground current flowing through the down conductor of lightning arrester judges that whether lightning arrester is breakdown, when determining that lightning arrester sends information to point out this lightning arrester breakdown after breakdown, being convenient to line attendant and finding trouble spot.Ground current can be detected at the down conductor of lightning arrester after lightning arrester is breakdown, in order to improve the accuracy of detection, avoid wrong report, delay time is detected again after ground connection electric power being detected, integrated ground electric current and delay time determination lightning arrester breakdown, and after detecting and checking the time of fault lightning arrester longer breakdown, send information in time, thus solve in prior art the problem checking that the time of fault lightning arrester is longer, and then reach the effect finding fault lightning arrester fast.
Preferably, failure detector also comprises: amplifying unit, for before the delay time obtaining ground current, amplifies ground current.
The inaccurate problem of the judgement caused in order to avoid electric current is too small, after ground current being detected, can amplify ground current, utilizes the electric current amplified to drive suggestion device to send information.
Alternatively, Tip element comprises: alarm module, for flash warning and/or board turning instruction to point out surge arrester failure.
Prompting surge arrester failure can by warning and/or the board turning instruction of flashing, flashing light alarm is convenient to circuit patrolman and is observed fault lightning arrester, board turning instruction can send radiofrequency signal, cue receiving end lightning arrester breaks down, can the information such as position of remote reporting fault lightning arrester, facilitate malfunction elimination personnel to lock rapidly fault lightning arrester, in time the normal operation recovering power distribution network is processed to fault lightning arrester, ensure that the stability that power distribution network runs and security.
Alternatively, failure detector also comprises: record cell, and for when ground current is greater than pre-set current value and delay time is greater than Preset Time, after prompting surge arrester failure, record sends the time of the prompting of surge arrester failure.Second judging unit, for judging whether current time meets the mistiming pre-set with the mistiming of the time sending surge arrester failure.Reset unit, for when current time meets with the mistiming of the time sending surge arrester failure the mistiming pre-set, detects ground current again.
After the prompting sending surge arrester failure, the time that record lightning arrester breaks down, the time and current time whether satisfied mistiming of presetting of breaking down can be detected at interval of certain hour, whether the time also can detecting current time and record in real time meets the mistiming of presetting with the time of breaking down, if meet the mistiming of presetting, then again detect lightning arrester whether fault.
Such as, be 24 constantly little when the mistiming of the time that lightning arrester breaks down and current time, again detect ground current and whether be greater than pre-set current value.
Pass through above-described embodiment, setting detects the time of ground current again, line attendant time enough can be given process fault lightning arrester, again detect ground current after fault is processed and whether breakdown fault occurs again to detect lightning arrester, thus at quick position to fault lightning arrester, the safety and stability of whole power distribution network can also be ensured.
The embodiment of the present invention additionally provides a kind of indicating fault instrument of lightning arrester.
Fig. 3 shows the schematic diagram of the indicating fault instrument of lightning arrester.As shown in Figure 3, the indicating fault instrument of this lightning arrester comprises: straight-through current transformer 11, delay circuit 22 and warning circuit 33.
Straight-through current transformer 11 is for detecting the ground current of the down conductor of lightning arrester.
Delay circuit 22 is connected with current transformer, for detecting the delay time of ground current.
Warning circuit 33, for when judging that ground current is greater than pre-set current value and delay time is greater than Preset Time, sends the alarm of surge arrester failure.
Straight-through current transformer 11 is connected with down conductor, the ground current flowing through down conductor can be detected, ground current flows through delay circuit 22 again, delay circuit 22 detects the delay time of ground current, after ground current flows through warning circuit 33, pre-set current value can be greater than judging ground current and delay time is greater than Preset Time time, send the alarm of surge arrester failure.
Preferably, indicating fault instrument also comprises: current amplifier 44 is arranged between straight-through current transformer and delay circuit, for amplifying ground current.
In order to detect ground current more accurately, current amplifier 44 is provided with between straight-through current transformer and delay circuit, this current amplifier can amplify ground current, and the electric current of amplification is input to delay circuit, delay circuit 22 detects the delay time of the electric current after amplifying.
Alternatively, warning circuit comprises: flash alarm circuit 331 is reported to the police for flashing to point out surge arrester failure; And/or board turning indicating circuit 332 is for sending board turning instruction to point out surge arrester failure.
Flash alarm circuit 331 and/or board turning indicating circuit 332 can be had in warning circuit.Prompting surge arrester failure can by warning and/or the board turning instruction of flashing, flashing light alarm is realized by flash alarm circuit 331, board turning instruction can be realized by board turning indicating circuit 332, flashing light alarm is convenient to circuit patrolman and is observed fault lightning arrester, board turning instruction can send radiofrequency signal, cue receiving end lightning arrester breaks down, can the information such as position of remote reporting fault lightning arrester, malfunction elimination personnel are facilitated to lock rapidly fault lightning arrester, in time the normal operation recovering power distribution network is processed to fault lightning arrester, ensure that the stability that power distribution network runs and security.
Alternatively, indicating fault instrument also comprises: functional reduction circuit 55 is for resetting to indicating fault instrument.
After the prompting sending surge arrester failure, the time that record lightning arrester breaks down, the time and current time whether satisfied mistiming of presetting of breaking down can be detected at interval of certain hour, whether the time also can detecting current time and record in real time meets the mistiming of presetting with the time of breaking down, if meet the mistiming of presetting, then indicating fault instrument is made to reset.
After indicating fault instrument resets, the task of performing detection failure lightning arrester can be continued, thunderbolt has just punctured lightning arrester, can not damage indicating fault instrument, after the fault of lightning arrester is excluded, indicating fault instrument can continue to use, certain indicating fault instrument can hand-reset, stop alarm, can also automatically reset under the condition meeting schedule time difference, thus at quick position to fault lightning arrester, the safety and stability of whole power distribution network can also be ensured.
In the above embodiment of the present invention, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. a fault detection method for lightning arrester, is characterized in that, comprising:
Detect the ground current of the down conductor of lightning arrester;
Obtain the delay time of described ground current;
Judge whether described ground current is greater than pre-set current value, and described delay time is greater than Preset Time; And
When described ground current is greater than described pre-set current value and described delay time is greater than described Preset Time, point out described surge arrester failure.
2. fault detection method according to claim 1, is characterized in that, before the delay time obtaining described ground current, described fault detection method also comprises:
Described ground current is amplified.
3. fault detection method according to claim 1, is characterized in that, when described ground current is greater than described pre-set current value and described delay time is greater than described Preset Time, points out described surge arrester failure to comprise:
Flash warning and/or board turning instruction to point out described surge arrester failure.
4. fault detection method according to claim 1, is characterized in that, when described ground current is greater than described pre-set current value and described delay time is greater than described Preset Time, after pointing out described surge arrester failure, described fault detection method also comprises:
Record sends the time of the prompting of described surge arrester failure;
Judge whether current time meets the mistiming pre-set with the mistiming of the time sending described surge arrester failure; And
When described current time meets with the mistiming of the time sending described surge arrester failure the mistiming pre-set, again detect described ground current.
5. a failure detector for lightning arrester, is characterized in that, comprising:
Detecting unit, for detecting the ground current of the down conductor of lightning arrester;
Acquiring unit, for obtaining the delay time of described ground current;
First judging unit, for judging whether described ground current is greater than pre-set current value, and described delay time is greater than Preset Time; And
Tip element, for when described ground current is greater than described pre-set current value and described delay time is greater than described Preset Time, points out described surge arrester failure.
6. failure detector according to claim 5, is characterized in that, described failure detector also comprises:
Amplifying unit, for before the delay time obtaining described ground current, amplifies described ground current.
7. failure detector according to claim 5, is characterized in that, described Tip element comprises:
Alarm module, reports to the police for flashing and/or board turning indicates to point out described surge arrester failure.
8. failure detector according to claim 5, is characterized in that, described failure detector also comprises:
Record cell, for when described ground current is greater than described pre-set current value and described delay time is greater than described Preset Time, after pointing out described surge arrester failure, record sends the time of the prompting of described surge arrester failure;
Second judging unit, for judging whether current time meets the mistiming pre-set with the mistiming of the time sending described surge arrester failure;
Reset unit, for when described current time meets with the mistiming of the time sending described surge arrester failure the mistiming pre-set, detects described ground current again.
9. an indicating fault instrument for lightning arrester, is characterized in that, comprising:
Straight-through current transformer, for detecting the ground current of the down conductor of lightning arrester;
Delay circuit, is connected with described straight-through current transformer, for detecting the delay time of described ground current;
Warning circuit, for when judging that described ground current is greater than pre-set current value and described delay time is greater than Preset Time, sends the alarm of described surge arrester failure.
10. indicating fault instrument according to claim 9, is characterized in that, described indicating fault instrument also comprises:
Current amplifier, is arranged between described straight-through current transformer and described delay circuit, for amplifying described ground current.
11. indicating fault instrument according to claim 9, it is characterized in that, described warning circuit comprises:
Flash alarm circuit, reports to the police for flashing to point out described surge arrester failure; And/or
Board turning indicating circuit, for sending board turning instruction to point out described surge arrester failure.
12. indicating fault instrument according to claim 9, is characterized in that, described indicating fault instrument also comprises:
Functional reduction circuit, for resetting to described indicating fault instrument.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410387097.6A CN105334406A (en) | 2014-08-07 | 2014-08-07 | Fault detection method and device and fault indicator of lightning arrester |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410387097.6A CN105334406A (en) | 2014-08-07 | 2014-08-07 | Fault detection method and device and fault indicator of lightning arrester |
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| CN105334406A true CN105334406A (en) | 2016-02-17 |
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| CN201410387097.6A Pending CN105334406A (en) | 2014-08-07 | 2014-08-07 | Fault detection method and device and fault indicator of lightning arrester |
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| CN108879950A (en) * | 2018-06-26 | 2018-11-23 | 伏诺瓦(天津)科技有限公司 | Transmission line of electricity lightning protection device monitors system |
| CN109375036A (en) * | 2018-11-15 | 2019-02-22 | 贵州电网有限责任公司 | A kind of arrester ground fault monitoring device based on Internet of Things Network Communication |
| CN112269142A (en) * | 2020-08-31 | 2021-01-26 | 广东电网有限责任公司 | Lightning arrester detection device and detection method |
| CN113419127A (en) * | 2021-06-23 | 2021-09-21 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Lightning arrester state monitoring method, device, equipment and storage medium |
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Application publication date: 20160217 |
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