CN104360238A - Lightning stroke detection method of electric transmission line - Google Patents
Lightning stroke detection method of electric transmission line Download PDFInfo
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- CN104360238A CN104360238A CN201410670572.0A CN201410670572A CN104360238A CN 104360238 A CN104360238 A CN 104360238A CN 201410670572 A CN201410670572 A CN 201410670572A CN 104360238 A CN104360238 A CN 104360238A
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- lightning
- lightning stroke
- detection method
- current
- stroke detection
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Abstract
The invention discloses a lightning stroke detection method of an electric transmission line. The lightning stroke detection method of the electric transmission line comprises the steps that differential current of the electric transmission line at the two ends of a detection point is collected, the differential current is monitored, when the differential current exceeds a preset threshold value, it is judged that a lightning stroke event happens, and when it is judged that the lightning stroke event happens, the detection point where the lightning stroke event happens sends out an indication signal. According to the lightning stroke detection method of the electric transmission line, the differential current of the electric transmission line at the two ends of the detection point is collected, and under normal circumstances, the differential current is quite small and can be basically neglected. When the lightning stroke event happens, lightning current is quite heavy, and the differential current at the moment is quite heavy. Through the lightning stroke indication method, the difference between fault current when the lightning stroke event happens and the normal current is obvious, and therefore a lightning stroke fault can be indicated more accurately and the sensitivity is higher.
Description
Technical field
The present invention relates to field of power, particularly relate to a kind of lightning stroke detection method of transmission line of electricity.
Background technology
According to national grid generating run situation analysis in recent years, in 110-500kV equipment breakdown, lightning stroke trip number of times accounts for transmission facility and always to trip first of number of times, causes transmission facility unplanned outage number of times ratio to account for second, has had a strong impact on safety and the reliability service of electrical network.
How operation power administrative authority, when running into transmission line lightning stroke fault, fast monitors position of failure point, is the key organized rapid rush-repair, repair normal operation, therefore provides a kind of thunderbolt indicating means on electric power line pole tower to be necessary.
The lightning stroke detection method of current power transmission line applications mostly is the magnetic field utilizing lightning impulse current, lightning current to produce, and excites inner rotation, launches or explosion mechanism, demonstrate obvious mark, the position of display thunderbolt.But these lightning stroke detection methods generally have fixing action current value, the instruction to thunderbolt event could be started when being struck by lightning and arriving working value to the electric current of shaft tower.If shaft tower is struck by lightning but thunder-strike current does not arrive working value, then can not play the effect of instruction thunderbolt position.Therefore, the sensitivity of thunderbolt event detection is had much room for improvement.
Summary of the invention
The object of this invention is to provide a kind of lightning stroke detection method of transmission line of electricity, object is to solve the not high problem of the existing method sensitivity detecting thunderbolt.
For solving the problems of the technologies described above, the invention provides a kind of lightning stroke detection method of transmission line of electricity, comprising:
The difference stream electric current of the transmission pressure at acquisition testing point two ends;
Monitor described difference stream electric current, when described difference stream current value exceedes default threshold value, judge that thunderbolt event occurs;
When judging that described thunderbolt event occurs, the check point that described thunderbolt event occurs sends indicator signal.
Alternatively, the difference stream electric current of the transmission pressure at described acquisition testing point two ends comprises:
By being arranged on the current transformer of the transmission pressure of insulator chain both sides, gather the current differential of the transmission pressure of described both sides, as described difference stream electric current.
Alternatively, described monitoring described difference stream electric current, when described difference stream current value exceedes default threshold value, judges that thunderbolt event comprises:
Monitor described difference stream electric current by processor, when described difference stream current value exceedes default threshold value, judge that thunderbolt event occurs, described processor has the device coding corresponding with the check point of described processor installation site.
Alternatively, also comprise:
When judging that described thunderbolt event occurs, record lightning current information, described lightning current information comprises the waveform of electric current when described thunderbolt event occurs, maximum amplitude and time of origin.
Alternatively, also comprise:
Described lightning current information is stored.
Alternatively, also comprise:
The instruction of the lightning current information of inquiry first monitoring point of described processor receiving terminal input, sends to described terminal by described lightning current information.
Alternatively, the instruction of the lightning current information of inquiry first monitoring point of described processor receiving terminal input, sends to described terminal to comprise described lightning current information:
Described terminal, by described device coding, identifies the first processor corresponding with described first monitoring point, wirelessly described lightning current information is sent to described terminal.
Alternatively, also comprise:
Described lightning current information is shown.
Alternatively, the check point of the described thunderbolt event of described generation sends indicator signal and comprises:
The check point that described thunderbolt event occurs is glimmered within default instruction time by pilot lamp.
Alternatively, also comprise:
The instruction of the stopping instruction that described pilot lamp receiving terminal sends, when not reaching described default instruction time, stops sending indicator signal.
Lightning stroke detection method provided by the present invention, by the difference stream electric current of the transmission pressure at acquisition testing point two ends, under normal circumstances, this difference stream electric current is very little, substantially can ignore.When there being thunderbolt event to occur, lightning current is very large, and difference stream electric current is now very large.Therefore real-time monitoring is carried out to the difference stream electric current collected, when described difference stream current value exceedes default threshold value, then judge that thunderbolt event occurs.Meanwhile, the position that thunderbolt event occurs is indicated.Due to thunderbolt indicating means provided by the present invention, the fault current when the event of thunderbolt occurs and between normal current difference obvious, therefore, it is possible to indicate lightning fault more accurately, sensitivity is higher.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of a kind of embodiment of the lightning stroke detection method of transmission line of electricity provided by the present invention;
Fig. 2 is the process flow diagram of the another kind of embodiment of the lightning stroke detection method of transmission line of electricity provided by the present invention.
Embodiment
In order to make those skilled in the art person understand the present invention program better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.Obviously, described embodiment is only the present invention's part embodiment, 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, belong to the scope of protection of the invention.
As shown in Figure 1, the method comprises the process flow diagram of a kind of embodiment of the lightning stroke detection method of transmission line of electricity provided by the present invention:
Step S101: the difference stream electric current of the transmission pressure at acquisition testing point two ends;
Step S102: monitor described difference stream electric current, when described difference stream current value exceedes default threshold value, judges that thunderbolt event occurs;
Step S103: when judging that described thunderbolt event occurs, the check point that described thunderbolt event occurs sends indicator signal.
Lightning stroke detection method provided by the present invention, by the difference stream electric current of the transmission pressure at acquisition testing point two ends, under normal circumstances, this difference stream electric current is very little, substantially can ignore.When there being thunderbolt event to occur, lightning current is very large, and difference stream electric current is now very large.Therefore real-time monitoring is carried out to the difference stream electric current collected, when described difference stream current value exceedes default threshold value, then judge that thunderbolt event occurs.Meanwhile, the position that thunderbolt event occurs is indicated.Due to thunderbolt indicating means provided by the present invention, the fault current when the event of thunderbolt occurs and between normal current difference obvious, therefore, it is possible to indicate lightning fault more accurately, sensitivity is higher.
As shown in Figure 2, the method comprises the another kind of embodiment of the lightning stroke detection method of transmission line of electricity provided by the present invention:
Step S201: by being arranged on the current transformer of the transmission pressure of insulator chain both sides, gather the current differential of the transmission pressure of described both sides, as described difference stream electric current;
Particularly, can arrange a current transformer respectively on the wire of tower insulation substring both sides, its secondary terminals is connected into poor stream mode, monitors the current differential be positioned on the transmission pressure of insulator chain both sides, i.e. difference current.Under normal circumstances, this difference stream electric current is very little, substantially can ignore.If but when having lightning discharge to occur herein, then lightning current will be very large.
Step S202: monitor described difference stream electric current by processor, when described difference stream current value exceedes default threshold value, judge that thunderbolt event occurs, described processor has the device coding corresponding with the check point of described processor installation site;
Described processor has the device coding corresponding with the check point of described processor installation site, may correspond to the pylon No. of write installation site.
Step S203: when judging that described thunderbolt event occurs, the check point that described thunderbolt event occurs is glimmered within default instruction time by pilot lamp;
Described indicator can be one or more LED light.When described thunderbolt event occurs, pilot lamp glimmers within default instruction time, its identification distance, and about 1000 meters of get final product identification.After exceeding described default instruction time, automatically reset.
Step S204: when judging that described thunderbolt event occurs, record lightning current information, described lightning current information comprises the waveform of electric current when described thunderbolt event occurs, maximum amplitude and time of origin;
Step S205: described lightning current information is stored;
Step S206: the instruction of the lightning current information of inquiry first monitoring point of described processor receiving terminal input, sends to described terminal by described lightning current information;
Described terminal can be carried out alternately with processor, and by described device coding, identify the first processor corresponding with described first monitoring point, described lightning current information is wirelessly sent to described terminal by this first processor.
This terminal can select hand-held receiving terminal, can send the lightning current information that instruction query stores, comprise the information such as amplitude of lightning current and time of origin, and this information be saved in terminal by terminal user.The instruction of the stopping instruction that described pilot lamp receiving terminal sends, when not reaching described default instruction time, stops sending indicator signal.Particularly, user makes the pilot lamp glimmered within default instruction time extinguish by terminal transmission instruction.
Step S207: the lightning current information that described terminal receives is shown.
Data can be reached on PC by interface and show by the lightning current information that terminal receives, and can carry out follow-up analysis and process further.
Lightning stroke detection method provided by the present invention, by the difference stream electric current of the transmission pressure at current transformer acquisition testing point two ends, under normal circumstances, this difference stream electric current is very little, substantially can ignore.When there being thunderbolt event to occur, lightning current is very large, and difference stream electric current is now very large.Therefore processor carries out real-time monitoring to the difference stream electric current that current transformer collects, and when described difference stream current value exceedes default threshold value, then judges that thunderbolt event occurs.Meanwhile, Control director indicates the position that thunderbolt event occurs.Due to lightning stroke detection method provided by the present invention, the fault current when the event of thunderbolt occurs and between normal current difference obvious, can accurately indicate lightning fault each time under monitoring variable selects rational situation, sensitivity is higher.
What lightning stroke detection method of the prior art had utilizes blasting arrangement to indicate, and there is certain potential safety hazard.Colour wafts after flag, colored ribbon etc. are blown out and may affect to the safe operation of circuit.And device corresponding to such detection method is generally single use device, after lightning impulse current makes device action, inner structure starts the flag colored ribbon that wafts etc. and obviously identifies, and these mark majorities can not restore or need to recover manually, therefore generally can not reuse or be not easy to reuse.
And the embodiment of the present invention have employed the mode that pilot lamp carries out flicker instruction, there is no explosion mechanism, there is not potential safety hazard.And pilot lamp can preset instruction time, can automatically reset after instruction time, there is the function repeating to indicate.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiment, between each embodiment same or similar part mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a lightning stroke detection method for transmission line of electricity, is characterized in that, comprising:
The difference stream electric current of the transmission pressure at acquisition testing point two ends;
Monitor described difference stream electric current, when described difference stream current value exceedes default threshold value, judge that thunderbolt event occurs;
When judging that described thunderbolt event occurs, the check point that described thunderbolt event occurs sends indicator signal.
2. lightning stroke detection method as claimed in claim 1, is characterized in that, the difference stream electric current of the transmission pressure at described acquisition testing point two ends comprises:
By being arranged on the current transformer of the transmission pressure of insulator chain both sides, gather the current differential of the transmission pressure of described both sides, as described difference stream electric current.
3. lightning stroke detection method as claimed in claim 1, is characterized in that, described monitoring described difference stream electric current, when described difference stream current value exceedes default threshold value, judges that thunderbolt event comprises:
Monitor described difference stream electric current by processor, when described difference stream current value exceedes default threshold value, judge that thunderbolt event occurs, described processor has the device coding corresponding with the check point of described processor installation site.
4. lightning stroke detection method as claimed in claim 3, is characterized in that, also comprise:
When judging that described thunderbolt event occurs, record lightning current information, described lightning current information comprises the waveform of electric current when described thunderbolt event occurs, maximum amplitude and time of origin.
5. lightning stroke detection method as claimed in claim 4, is characterized in that, also comprise:
Described lightning current information is stored.
6. lightning stroke detection method as claimed in claim 4, is characterized in that, also comprise:
The instruction of the lightning current information of inquiry first monitoring point of described processor receiving terminal input, sends to described terminal by described lightning current information.
7. lightning stroke detection method as claimed in claim 6, is characterized in that, the instruction of the lightning current information of inquiry first monitoring point of described processor receiving terminal input, sends to described terminal to comprise described lightning current information:
Described terminal, by described device coding, identifies the first processor corresponding with described first monitoring point, wirelessly described lightning current information is sent to described terminal.
8. lightning stroke detection method as claimed in claim 7, is characterized in that, also comprise:
Described lightning current information is shown.
9. lightning stroke detection method as claimed in claim 1, it is characterized in that, the check point of the described thunderbolt event of described generation sends indicator signal and comprises:
The check point that described thunderbolt event occurs is glimmered within default instruction time by pilot lamp.
10. lightning stroke detection method as claimed in claim 9, is characterized in that, also comprise:
The instruction of the stopping instruction that described pilot lamp receiving terminal sends, when not reaching described default instruction time, stops sending indicator signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410670572.0A CN104360238A (en) | 2014-11-20 | 2014-11-20 | Lightning stroke detection method of electric transmission line |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410670572.0A CN104360238A (en) | 2014-11-20 | 2014-11-20 | Lightning stroke detection method of electric transmission line |
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| CN104360238A true CN104360238A (en) | 2015-02-18 |
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| CN201410670572.0A Pending CN104360238A (en) | 2014-11-20 | 2014-11-20 | Lightning stroke detection method of electric transmission line |
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Cited By (3)
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| CN105259478A (en) * | 2015-11-18 | 2016-01-20 | 国家电网公司 | Lightning flashover position identification device |
| CN105911433A (en) * | 2016-06-30 | 2016-08-31 | 上海交通大学 | Recognition method for lightning stroke category of electric transmission line |
| CN106597224A (en) * | 2016-12-20 | 2017-04-26 | 国家电网公司 | Extra-high-voltage overhead line lightning current leakage acquisition and positioning analysis system |
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| CN103592618A (en) * | 2012-08-14 | 2014-02-19 | 广州光点信息科技有限公司 | Ultrasonic positioning method and ultrasonic positioning system |
| CN104050244A (en) * | 2014-05-29 | 2014-09-17 | 国网电力科学研究院武汉南瑞有限责任公司 | Hand-held lightning query system applied in power grid |
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| JPH05264637A (en) * | 1992-03-17 | 1993-10-12 | Ngk Insulators Ltd | Device for detecting disconnection of strand of overhead earth-wire |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105259478A (en) * | 2015-11-18 | 2016-01-20 | 国家电网公司 | Lightning flashover position identification device |
| CN105911433A (en) * | 2016-06-30 | 2016-08-31 | 上海交通大学 | Recognition method for lightning stroke category of electric transmission line |
| CN105911433B (en) * | 2016-06-30 | 2018-12-18 | 上海交通大学 | The recognition methods of transmission line lightning stroke type |
| CN106597224A (en) * | 2016-12-20 | 2017-04-26 | 国家电网公司 | Extra-high-voltage overhead line lightning current leakage acquisition and positioning analysis system |
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Application publication date: 20150218 |