CN113945807A - Lightning stroke detection and positioning method for power transmission line - Google Patents
Lightning stroke detection and positioning method for power transmission line Download PDFInfo
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- CN113945807A CN113945807A CN202111358790.7A CN202111358790A CN113945807A CN 113945807 A CN113945807 A CN 113945807A CN 202111358790 A CN202111358790 A CN 202111358790A CN 113945807 A CN113945807 A CN 113945807A
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- 208000025274 Lightning injury Diseases 0.000 title claims abstract description 49
- 230000005540 biological transmission Effects 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000001514 detection method Methods 0.000 title claims abstract description 13
- 230000005684 electric field Effects 0.000 claims abstract description 96
- 230000001902 propagating effect Effects 0.000 claims description 6
- 239000013307 optical fiber Substances 0.000 claims description 3
- 238000012163 sequencing technique Methods 0.000 abstract 1
- 230000008054 signal transmission Effects 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
Abstract
The invention provides a lightning stroke detection and positioning method for a power transmission line, which comprises the following steps: (1): collecting the electric field intensity of a tower pole of the power transmission line and a polarized light signal of the tower pole; (2): sequencing the strength of the electric field from high to low, and finding the tower pole with the highest electric field strength and the next highest electric field strength; (3): acquiring the geographical positions of the tower poles with the highest electric field intensity and the next highest adjacent electric field intensity; (4): calculating the distance between the two tower poles; (5): judging whether lightning stroke occurs according to the highest electric field intensity, and if so, entering (6); if not, returning to the step (1); (6): the polarized light signals of the tower pole with the highest electric field intensity and the next highest adjacent electric field intensity are obtained; (7): calculating the time of the polarized light signal reaching the tower pole with the highest electric field intensity and the next highest adjacent pole; (8): and determining the lightning stroke occurrence position. The invention provides a lightning stroke detection and positioning method for a power transmission line, which can accurately detect lightning stroke faults and specific lightning stroke positions.
Description
Technical Field
The invention belongs to the technical field of electric power detection, and particularly relates to a lightning stroke detection and positioning method for a power transmission line.
Background
The transmission line is an important carrier for power transmission of a power grid, the working environment of the transmission line is various, the transmission line is easily influenced by the outside, and then the safe and reliable work of the transmission line is influenced.
Lightning stroke faults are one of the common conditions of power transmission lines, especially in summer thunderstorm, due to the complexity of the environment, certain errors generally exist in the position determination of lightning strokes, and when the faults are not eliminated in time, the faults can affect the power transmission and distribution network.
The invention provides a lightning strike detection and positioning method for a power transmission line, which is used for judging whether a lightning strike occurs according to the acquired electric field intensity, determining the lightning strike position according to a polarized light signal acquired by a tower pole and the signal transmission speed, and effectively improving the accuracy of a detection result.
Disclosure of Invention
The invention provides a lightning stroke detection and positioning method for a power transmission line, which can accurately detect lightning stroke faults and specific lightning stroke positions.
The invention specifically relates to a lightning strike detection and positioning method for a power transmission line, which comprises the following steps:
step (1): collecting the electric field intensity of the tower pole of the power transmission line and a tower pole polarized light signal;
step (2): sorting the electric field intensity from high to low to find the tower pole with the highest electric field intensity and the next highest electric field intensity;
and (3): acquiring the geographical positions of the tower pole with the highest electric field intensity and the next highest adjacent electric field intensity;
and (4): calculating the distance between the two towers;
and (5): judging whether lightning stroke occurs according to the highest electric field intensity, and if so, entering the step (6); if not, returning to the step (1);
and (6): calling the polarized light signals of the tower pole with the highest electric field intensity and the next highest adjacent electric field intensity;
and (7): calculating the time of the polarized light signal reaching the tower pole with the highest electric field intensity and the next highest adjacent electric field intensity;
and (8): and determining the lightning stroke occurrence position.
The method for judging whether the lightning stroke occurs according to the highest electric field intensity comprises the following steps: and judging whether the highest electric field intensity is greater than an electric field intensity reference value, if so, lightning stroke occurs on the power transmission line.
The specific method for determining the lightning stroke occurrence position comprises the following steps:
firstly, calculating the time difference of the real polarized light signal and the pseudo wave head signal reaching the power transmission line;
secondly, calculating the distance L between the lightning stroke point and the tower pole with the highest electric field intensity1The distance L between the lightning stroke point and the next highest adjacent tower pole of the electric field intensity2；
Thirdly, judging whether the distance between the tower pole with the highest electric field intensity is larger than the distance between the tower pole with the next highest electric field intensity or not, if not, judging that the lightning stroke position is the distance between the tower pole with the highest electric field intensity and the tower pole L1The position of (a);
if yes, recalculating the time of the polarized light signal reaching the next highest tower pole, and calculating the distance L between the lightning stroke point and the next highest tower pole adjacent to the electric field intensity2。
The algorithm for calculating the time difference of the real polarized light signal and the pseudo wave head signal reaching the power transmission line is
Wherein L is the distance between the tower pole with the highest electric field intensity and the next highest electric field intensity, C is the speed of light propagating in vacuum, n is the refractive index of the optical fiber, and V is the speed of the polarized light signal propagating on the stranded wire。
The algorithm for calculating the distance between the lightning stroke point and the tower pole with the highest electric field intensity comprises the following steps:
t1the time t of the polarized light signal reaching the tower pole with the highest electric field intensity2The time when the polarized light signal reaches the next highest tower pole adjacent to the electric field intensity is obtained.
The algorithm for calculating the distance between the lightning stroke point and the tower pole with the highest electric field intensity next time is as follows:
the method for recalculating the time for the polarized light signal to reach the next highest tower pole comprises the following steps: within the time of 0-delta T, the polarized light signals collected by the tower poles of adjacent times of the electric field intensity are derived, and the time corresponding to the maximum value of the absolute value is taken as the time for the polarized light signals to reach the tower pole of the adjacent highest time; calculating the distance between the lightning stroke point and the tower pole with the highest electric field intensity
Compared with the prior art, the beneficial effects are: the power transmission line lightning stroke detection and positioning method judges whether lightning stroke occurs according to the collected electric field intensity, and determines the lightning stroke position according to the polarized light signal collected by the tower pole and the signal transmission speed, so that the accuracy of the detection result is effectively improved.
Drawings
FIG. 1 is a flow chart of the operation of the method for detecting and positioning lightning strike on a power transmission line.
Detailed Description
The following describes in detail a specific embodiment of the method for detecting and positioning lightning strike of a power transmission line according to the present invention with reference to the accompanying drawings.
As shown in FIG. 1, the method for detecting and positioning lightning strike of power transmission line of the invention comprises the following steps:
step (1): collecting the electric field intensity of the tower pole of the power transmission line and a tower pole polarized light signal;
step (2): sorting the electric field intensity from high to low to find the tower pole with the highest electric field intensity and the next highest electric field intensity;
and (3): acquiring the geographical positions of the tower pole with the highest electric field intensity and the next highest adjacent electric field intensity;
and (4): calculating the distance between the two towers;
and (5): judging whether lightning stroke occurs according to the highest electric field intensity, and if so, entering the step (6); if not, returning to the step (1);
and (6): calling the polarized light signals of the tower pole with the highest electric field intensity and the next highest adjacent electric field intensity;
and (7): calculating the time of the polarized light signal reaching the tower pole with the highest electric field intensity and the next highest adjacent electric field intensity;
and (8): and determining the lightning stroke occurrence position.
The method for judging whether the lightning stroke occurs according to the highest electric field intensity comprises the following steps: and judging whether the highest electric field intensity is greater than an electric field intensity reference value, if so, lightning stroke occurs on the power transmission line.
The specific method for determining the lightning stroke occurrence position comprises the following steps:
firstly, calculating the time difference of the real polarized light signal and the pseudo wave head signal reaching the power transmission line;
secondly, calculating the distance L between the lightning stroke point and the tower pole with the highest electric field intensity1The distance L between the lightning stroke point and the next highest adjacent tower pole of the electric field intensity2；
Thirdly, judging whether the distance between the tower pole with the highest electric field intensity is larger than the distance between the tower pole with the next highest electric field intensity or not, if not, judging that the lightning stroke position is the distance between the tower pole with the highest electric field intensity and the tower pole L1The position of (a);
if yes, recalculating the time of the polarized light signal reaching the next highest tower pole, and calculating the lightningThe distance L between the impact point and the next highest tower pole adjacent to the electric field intensity2。
The algorithm for calculating the time difference of the real polarized light signal and the pseudo wave head signal reaching the power transmission line is
Wherein L is the distance between the tower pole with the highest electric field intensity and the next highest electric field intensity, C is the speed of light propagating in vacuum, n is the refractive index of the optical fiber, and V is the speed of the polarized light signal propagating on the stranded wire.
The algorithm for calculating the distance between the lightning stroke point and the tower pole with the highest electric field intensity comprises the following steps:
t1the time t of the polarized light signal reaching the tower pole with the highest electric field intensity2The time when the polarized light signal reaches the next highest tower pole adjacent to the electric field intensity is obtained.
The algorithm for calculating the distance between the lightning stroke point and the tower pole with the highest electric field intensity next time is as follows:
the method for recalculating the time for the polarized light signal to reach the next highest tower pole comprises the following steps: within the time of 0-delta T, the polarized light signals collected by the tower poles of adjacent times of the electric field intensity are derived, and the time corresponding to the maximum value of the absolute value is taken as the time for the polarized light signals to reach the tower pole of the adjacent highest time; calculating the distance between the lightning stroke point and the tower pole with the highest electric field intensity
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. The lightning strike detection and positioning method for the power transmission line is characterized by comprising the following steps of:
step (1): collecting the electric field intensity of the tower pole of the power transmission line and a tower pole polarized light signal;
step (2): sorting the electric field intensity from high to low to find the tower pole with the highest electric field intensity and the second highest electric field intensity;
and (3): acquiring the geographical positions of the tower poles with the highest electric field intensity and the next highest electric field intensity;
and (4): calculating the distance between the two towers;
and (5): judging whether lightning stroke occurs according to the highest electric field intensity, and if so, entering the step (6); if not, returning to the step (1);
and (6): calling the polarized light signals of the tower pole with the highest electric field intensity and the next highest adjacent electric field intensity;
and (7): calculating the time of the polarized light signal reaching the tower pole with the highest electric field intensity and the next highest adjacent electric field intensity;
and (8): and determining the lightning stroke occurrence position.
2. The method for detecting and positioning the lightning strike of the power transmission line according to claim 1, wherein the method for judging whether the lightning strike occurs according to the highest electric field intensity comprises the following steps: and judging whether the highest electric field intensity is greater than an electric field intensity reference value, if so, lightning stroke occurs on the power transmission line.
3. The method for detecting and positioning the lightning strike on the power transmission line according to claim 2, wherein the specific method for determining the position where the lightning strike occurs is as follows:
firstly, calculating the time difference of the real polarized light signal and the pseudo wave head signal reaching the power transmission line;
secondly, calculating the distance L between the lightning stroke point and the tower pole with the highest electric field intensity1The distance L between the lightning stroke point and the next highest adjacent tower pole of the electric field intensity2；
Thirdly, judging whether the distance between the tower pole with the highest electric field intensity is larger than the distance between the tower pole with the next highest electric field intensity or not, if not, judging that the lightning stroke position is the distance between the tower pole with the highest electric field intensity and the tower pole L1The position of (a);
if yes, recalculating the time of the polarized light signal reaching the next highest tower pole, and calculating the distance L between the lightning stroke point and the next highest tower pole adjacent to the electric field intensity2。
4. The method according to claim 3, wherein the algorithm for calculating the time difference between the true polarized light signal and the pseudo wave head signal reaching the power transmission line is
Wherein L is the distance between the tower pole with the highest electric field intensity and the next highest electric field intensity, C is the speed of light propagating in vacuum, n is the refractive index of the optical fiber, and V is the speed of the polarized light signal propagating on the stranded wire.
5. The method for detecting and positioning the lightning strike of the power transmission line according to claim 4, wherein the algorithm for calculating the distance from the lightning strike point to the tower pole with the highest electric field intensity is as follows:
t1the time t of the polarized light signal reaching the tower pole with the highest electric field intensity2The time when the polarized light signal reaches the next highest tower pole adjacent to the electric field intensity is obtained.
6. The method according to claim 5, characterized in thatThen, the algorithm for calculating the distance between the lightning stroke point and the tower pole with the next highest electric field intensity is as follows:
7. the method for detecting and positioning the lightning strike of the power transmission line according to claim 5, wherein the method for recalculating the time for the polarized light signal to reach the next highest adjacent tower pole comprises the following steps: within the time of 0-delta T, the polarized light signals collected by the tower poles of adjacent times of the electric field intensity are derived, and the time corresponding to the maximum value of the absolute value is taken as the time for the polarized light signals to reach the tower pole of the adjacent highest time; calculating the distance between the lightning stroke point and the tower pole with the highest electric field intensity
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Citations (5)
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| CN104155568A (en) * | 2013-05-13 | 2014-11-19 | 海南电力技术研究院 | Method for accurately positioning lightning conductor, struck by lightning, of power transmission line |
| CN107037269A (en) * | 2017-04-14 | 2017-08-11 | 云南电网有限责任公司电力科学研究院 | A kind of power transmission line lightning shielding method for early warning |
| CN109084673A (en) * | 2018-08-22 | 2018-12-25 | 国网江苏省电力有限公司盐城供电分公司 | A kind of power transmission line sag monitoring system and its monitoring method based on arc sag extreme lower position electric field intensity measuremenrt |
| CN110018399A (en) * | 2019-05-15 | 2019-07-16 | 武汉康普常青软件技术股份有限公司 | A kind of lightning fault localization method based on optical signal polarization state in transmission line of electricity OPGW |
| CN110441655A (en) * | 2019-08-08 | 2019-11-12 | 中广核玉溪元江风力发电有限公司 | A kind of wind power plant collection electric line lightning stroke ground fault detection system |
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2021
- 2021-11-17 CN CN202111358790.7A patent/CN113945807A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104155568A (en) * | 2013-05-13 | 2014-11-19 | 海南电力技术研究院 | Method for accurately positioning lightning conductor, struck by lightning, of power transmission line |
| CN107037269A (en) * | 2017-04-14 | 2017-08-11 | 云南电网有限责任公司电力科学研究院 | A kind of power transmission line lightning shielding method for early warning |
| CN109084673A (en) * | 2018-08-22 | 2018-12-25 | 国网江苏省电力有限公司盐城供电分公司 | A kind of power transmission line sag monitoring system and its monitoring method based on arc sag extreme lower position electric field intensity measuremenrt |
| CN110018399A (en) * | 2019-05-15 | 2019-07-16 | 武汉康普常青软件技术股份有限公司 | A kind of lightning fault localization method based on optical signal polarization state in transmission line of electricity OPGW |
| CN110441655A (en) * | 2019-08-08 | 2019-11-12 | 中广核玉溪元江风力发电有限公司 | A kind of wind power plant collection electric line lightning stroke ground fault detection system |
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