CN113820535A - High-voltage power transmission and distribution line lightning stroke detection method based on environmental factors - Google Patents
High-voltage power transmission and distribution line lightning stroke detection method based on environmental factors Download PDFInfo
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- 238000012806 monitoring device Methods 0.000 claims abstract description 27
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- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
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Abstract
The invention provides a high-voltage power transmission and distribution line lightning stroke detection method based on environmental factors, which comprises the following steps: (1): the lightning stroke monitoring device is in a standby mode; (2): acquiring weather information and an environmental signal; (3): pre-judging lightning stroke according to the environmental information; (4): calculating the density of the adjacent landfall; (5): judging whether the density of the adjacent landmine is greater than a reference value, if so, entering (6); if not, returning to the step (2); (6): calculating the distance between the near lightning falling point and the high-voltage power transmission and distribution line; (7): judging whether the distance is greater than a reference value, if so, entering (8); if not, returning to the step (2); (8): controlling the lightning stroke monitoring device to be in a pre-trigger mode; (9): and judging whether lightning stroke occurs or not, if so, enabling the lightning stroke monitoring device to enter a trigger mode, continuously acquiring information, analyzing and uploading. The invention provides a high-voltage power transmission and distribution line lightning stroke detection method based on environmental factors, which can accurately and timely determine whether lightning stroke occurs.
Description
Technical Field
The invention belongs to the technical field of electric power detection, and particularly relates to a high-voltage power transmission and distribution line lightning stroke detection method based on environmental factors.
Background
The high-voltage transmission and distribution line is an important component of an electric power system and an important carrier for completing electric energy transmission. The transmission distance of the high-voltage power transmission and distribution line is long, the working environment is remote and complex, the influence of the natural environment is large, the high-voltage power transmission and distribution line needs to be effectively monitored, and the safety and the stability of the power transmission line are improved.
The method has relevant data statistics, and the power system faults caused by lightning account for 40% -70% of the annual faults, are the main hazards of safe and stable operation of the high-voltage power transmission and distribution line, and need to effectively monitor the lightning of the power transmission and distribution line in real time, further count the lightning distribution rules of the power transmission and distribution line, accurately analyze accidents, and take relevant protective measures.
The invention provides a high-voltage power transmission and distribution line lightning stroke detection method based on environmental factors, which is used for acquiring environmental information and position information, calculating the near lightning falling density and the distance between a near lightning falling point and a high-voltage power transmission and distribution line, obtaining the lightning stroke possibility of the high-voltage power transmission and distribution line, further better controlling a lightning stroke monitoring device and improving the accuracy and the efficiency of detection processing.
Disclosure of Invention
The invention provides a high-voltage power transmission and distribution line lightning stroke detection method based on environmental factors, which can accurately and timely determine whether lightning stroke occurs or not so as to take effective treatment measures.
The invention specifically relates to a high-voltage power transmission and distribution line lightning stroke detection method based on an environmental factor, which comprises the following steps:
step (1): the lightning stroke monitoring device is in a standby mode;
step (2): acquiring weather information and an environmental signal;
and (3): prejudging the lightning stroke according to the environmental information;
and (4): calculating the density of the adjacent landfall;
and (5): judging whether the adjacent lightning falling density is larger than the adjacent lightning falling density reference value or not, if so, entering the step (6); if not, returning to the step (2);
and (6): calculating the distance between the near lightning falling point and the high-voltage power transmission and distribution line;
and (7): judging whether the distance between the near lightning falling point and the high-voltage power transmission and distribution line is greater than a distance reference value or not, if so, entering the step (8); if not, returning to the step (2);
and (8): controlling the lightning strike monitoring device to be in a pre-trigger mode;
and (9): and judging whether lightning stroke occurs according to the information acquired by the lightning stroke monitoring device, if so, controlling the lightning stroke monitoring device to enter a trigger mode, continuously acquiring the information, analyzing and uploading the information.
The lightning strike monitoring device includes the standby mode, the pre-trigger mode, and the trigger mode.
The specific method for prejudging the lightning stroke according to the environmental information comprises the following steps: judging whether the magnetic field intensity in the range of the power transmission and distribution line to be detected is greater than the magnetic field intensity reference value, if so, entering the step (4); if not, returning to the step (2).
The algorithm for calculating the density of the adjacent landfall is as follows:
n is the lightning density, W is the total lightning width of the high-voltage power transmission and distribution line corridor, and L is the span of the power transmission and distribution line to be detected.
The method for calculating the distance between the near lightning falling point and the high-voltage power transmission and distribution line comprises the following steps:
firstly, calling the geographic position of the nearby lightning drop point;
secondly, calculating the distance between the near lightning falling point and the adjacent tower pole of the power transmission and distribution line to be detected;
thirdly, calculating the distance between the near lightning falling point and the high-voltage power transmission and distribution line
l1、l2And the distance between the near lightning falling point and the adjacent tower pole of the power transmission and distribution line to be detected is obtained.
The information collected by the lightning stroke monitoring device comprises overvoltage generated by lightning on the power transmission and distribution line to be detected and the grounding current input to the tower pole when the lightning occurs.
And acquiring the overvoltage by adopting a non-contact voltage sensor, and acquiring the grounding current by adopting a Rogowski coil current sensor.
The specific method for judging whether the lightning stroke occurs according to the information collected by the lightning stroke monitoring device comprises the following steps: judging whether the overvoltage is larger than an overvoltage reference value or not, if so, judging that the power transmission and distribution line to be detected is struck by lightning; if not, judging whether the ground current is larger than the ground current reference value, if so, judging that the power transmission and distribution line to be detected is struck by lightning, and if not, returning to the step (2).
Compared with the prior art, the beneficial effects are: the high-voltage power transmission and distribution line lightning stroke detection method collects environmental information and position information, calculates the near lightning falling density and the near lightning falling point distance from the high-voltage power transmission and distribution line, obtains the lightning stroke possibility of the high-voltage power transmission and distribution line, further better controls a lightning stroke monitoring device, and improves the accuracy and the efficiency of detection processing.
Drawings
FIG. 1 is a working flow chart of a high-voltage power transmission and distribution line lightning stroke detection method based on environmental factors.
Detailed Description
The following describes in detail a specific embodiment of the high voltage transmission and distribution line lightning strike detection method based on environmental factors according to the present invention with reference to the accompanying drawings.
As shown in FIG. 1, the method for detecting the lightning stroke of the high-voltage power transmission and distribution line comprises the following steps:
step (1): the lightning stroke monitoring device is in a standby mode;
step (2): acquiring weather information and an environmental signal;
and (3): prejudging the lightning stroke according to the environmental information: judging whether the magnetic field intensity in the range of the power transmission and distribution line to be detected is greater than the magnetic field intensity reference value, if so, entering the step (4); if not, returning to the step (2);
and (4): calculating the approaching thunderbolt density
N is the lightning falling density, W is the total lightning receiving width of the high-voltage power transmission and distribution line corridor, and L is the span of the power transmission and distribution line to be detected;
and (5): judging whether the adjacent lightning falling density is larger than the adjacent lightning falling density reference value or not, if so, entering the step (6); if not, returning to the step (2);
and (6): calculating the distance between the near lightning falling point and the high-voltage power transmission and distribution line:
firstly, calling the geographic position of the nearby lightning drop point;
secondly, calculating the distance between the near lightning falling point and the adjacent tower pole of the power transmission and distribution line to be detected;
thirdly, calculating the distance between the near lightning falling point and the high-voltage power transmission and distribution line
l1、l2The distance between the near lightning falling point and the adjacent tower pole of the power transmission and distribution line to be detected is calculated;
and (7): judging whether the distance between the near lightning falling point and the high-voltage power transmission and distribution line is greater than a distance reference value or not, if so, entering the step (8); if not, returning to the step (2);
and (8): controlling the lightning strike monitoring device to be in a pre-trigger mode;
and (9): and judging whether lightning stroke occurs according to the information acquired by the lightning stroke monitoring device, if so, controlling the lightning stroke monitoring device to enter a trigger mode, continuously acquiring the information, analyzing and uploading the information.
The lightning strike monitoring device includes the standby mode, the pre-trigger mode, and the trigger mode.
The information collected by the lightning stroke monitoring device comprises overvoltage generated by lightning on the power transmission and distribution line to be detected and the grounding current input to the tower pole when the lightning occurs.
The lightning stroke monitoring device adopts a non-contact voltage sensor to collect the overvoltage and adopts a Rogowski coil current sensor to collect the ground current.
The specific method for judging whether the lightning stroke occurs according to the information collected by the lightning stroke monitoring device comprises the following steps: judging whether the overvoltage is larger than an overvoltage reference value or not, if so, judging that the power transmission and distribution line to be detected is struck by lightning; if not, judging whether the ground current is larger than the ground current reference value, if so, judging that the power transmission and distribution line to be detected is struck by lightning, and if not, returning to the step (2).
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 (8)
1. A high-voltage power transmission and distribution line lightning stroke detection method based on environmental factors is characterized by comprising the following steps:
step (1): the lightning stroke monitoring device is in a standby mode;
step (2): acquiring weather information and an environmental signal;
and (3): prejudging the lightning stroke according to the environmental information;
and (4): calculating the density of the adjacent landfall;
and (5): judging whether the adjacent lightning falling density is larger than the adjacent lightning falling density reference value or not, if so, entering the step (6); if not, returning to the step (2);
and (6): calculating the distance between the near lightning falling point and the high-voltage power transmission and distribution line;
and (7): judging whether the distance between the near lightning falling point and the high-voltage power transmission and distribution line is greater than a distance reference value or not, if so, entering the step (8); if not, returning to the step (2);
and (7): controlling the lightning strike monitoring device to be in a pre-trigger mode;
and (8): and judging whether lightning stroke occurs according to the information acquired by the lightning stroke monitoring device, if so, controlling the lightning stroke monitoring device to enter a trigger mode, continuously acquiring the information, analyzing and uploading the information.
2. The method of claim 1, wherein the lightning strike monitoring device comprises the standby mode, the pre-trigger mode, and the trigger mode.
3. The method for detecting the lightning strike of the high-voltage power transmission and distribution line based on the environmental factor according to claim 2 is characterized in that the specific method for prejudging the lightning strike according to the environmental information is as follows: judging whether the magnetic field intensity in the range of the power transmission and distribution line to be detected is greater than the magnetic field intensity reference value, if so, entering the step (4); if not, returning to the step (2).
4. The high-voltage power transmission and distribution line lightning stroke detection method based on the environmental factor as recited in claim 3, characterized in that the algorithm for calculating the lightning strike-near density is as follows:
n is the lightning density, W is the total lightning width of the high-voltage power transmission and distribution line corridor, and L is the span of the power transmission and distribution line to be detected.
5. The high-voltage power transmission and distribution line lightning stroke detection method based on the environmental factor as recited in claim 4, characterized in that the method for calculating the distance from the near lightning drop point to the high-voltage power transmission and distribution line is as follows:
firstly, calling the geographic position of the nearby lightning drop point;
secondly, calculating the distance between the near lightning falling point and the adjacent tower pole of the power transmission and distribution line to be detected;
thirdly, calculating the distance between the near lightning falling point and the high-voltage power transmission and distribution line
l1、l2And the distance between the near lightning falling point and the adjacent tower pole of the power transmission and distribution line to be detected is obtained.
6. The high-voltage power transmission and distribution line lightning stroke detection method based on the environmental factor as recited in claim 5, wherein the information collected by the lightning stroke monitoring device comprises overvoltage generated by lightning on the power transmission and distribution line to be detected and grounding current input to the tower pole when the lightning occurs.
7. The high-voltage power transmission and distribution line lightning stroke detection method based on the environmental factor as recited in claim 6, characterized in that the overvoltage is collected by a non-contact voltage sensor, and the ground current is collected by a Rogowski coil current sensor.
8. The high-voltage power transmission and distribution line lightning stroke detection method based on the environmental factor as recited in claim 7, wherein the specific method for judging whether a lightning stroke occurs according to the information collected by the lightning stroke monitoring device is as follows: judging whether the overvoltage is larger than an overvoltage reference value or not, if so, judging that the power transmission and distribution line to be detected is struck by lightning; if not, judging whether the ground current is larger than the ground current reference value, if so, judging that the power transmission and distribution line to be detected is struck by lightning, and if not, returning to the step (2).
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| CN102590651A (en) * | 2011-12-31 | 2012-07-18 | 国网电力科学研究院 | Measured lightning data-based transmission line failure probability evaluation method |
| CN105137286A (en) * | 2015-09-01 | 2015-12-09 | 国网新疆电力公司经济技术研究院 | Power transmission line lightning stroke monitoring device and lightning protection level assessment method |
| CN107797016A (en) * | 2017-10-02 | 2018-03-13 | 国网山西省电力公司电力科学研究院 | A kind of diagnostic method for transmission line lightning stroke failure |
| CN108389010A (en) * | 2018-04-19 | 2018-08-10 | 国网陕西省电力公司电力科学研究院 | Distribution lightning information fusion forecasting risk method |
| CN110850185A (en) * | 2019-12-02 | 2020-02-28 | 象辑知源（武汉）科技有限公司 | Lightning forecasting method based on power transmission line |
-
2021
- 2021-09-15 CN CN202111078769.1A patent/CN113820535A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426301A (en) * | 2011-09-14 | 2012-04-25 | 国网电力科学研究院武汉南瑞有限责任公司 | Early warning method of overhead transmission line lightning strike flashover |
| CN102590651A (en) * | 2011-12-31 | 2012-07-18 | 国网电力科学研究院 | Measured lightning data-based transmission line failure probability evaluation method |
| CN105137286A (en) * | 2015-09-01 | 2015-12-09 | 国网新疆电力公司经济技术研究院 | Power transmission line lightning stroke monitoring device and lightning protection level assessment method |
| CN107797016A (en) * | 2017-10-02 | 2018-03-13 | 国网山西省电力公司电力科学研究院 | A kind of diagnostic method for transmission line lightning stroke failure |
| CN108389010A (en) * | 2018-04-19 | 2018-08-10 | 国网陕西省电力公司电力科学研究院 | Distribution lightning information fusion forecasting risk method |
| CN110850185A (en) * | 2019-12-02 | 2020-02-28 | 象辑知源（武汉）科技有限公司 | Lightning forecasting method based on power transmission line |
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