CN108427040B - Lightning detection method and device for power supply area - Google Patents
Lightning detection method and device for power supply area Download PDFInfo
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- CN108427040B CN108427040B CN201711307434.6A CN201711307434A CN108427040B CN 108427040 B CN108427040 B CN 108427040B CN 201711307434 A CN201711307434 A CN 201711307434A CN 108427040 B CN108427040 B CN 108427040B
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- 238000001514 detection method Methods 0.000 title claims abstract description 23
- 230000005684 electric field Effects 0.000 claims abstract description 36
- 230000005855 radiation Effects 0.000 claims abstract description 18
- 238000005070 sampling Methods 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 3
- 208000025274 Lightning injury Diseases 0.000 description 1
- 206010042255 Struck by lightning Diseases 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0807—Measuring electromagnetic field characteristics characterised by the application
- G01R29/0814—Field measurements related to measuring influence on or from apparatus, components or humans, e.g. in ESD, EMI, EMC, EMP testing, measuring radiation leakage; detecting presence of micro- or radiowave emitters; dosimetry; testing shielding; measurements related to lightning
- G01R29/0842—Measurements related to lightning, e.g. measuring electric disturbances, warning systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
- G01R29/0871—Complete apparatus or systems; circuits, e.g. receivers or amplifiers
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Abstract
The invention relates to a lightning detection method aiming at a power supply area, which comprises the following steps: arranging a local lightning radio frequency sensor in the power supply area and/or the periphery of the power supply area to detect a very low frequency signal and a very high frequency signal radiated by lightning and determine the radiation peak time and the first return stroke peak time of the lightning, sampling a magnetic field north-south component, a magnetic field east-west component and a vertical electric field component at the position of the local lightning radio frequency sensor at the radiation peak time, and sampling the vertical electric field component again at the first return stroke peak time; judging the direction of lightning; and calculating the ratio of the vertical electric field component of the position of the local lightning radio frequency sensor at the moment of the first back striking peak value to the vertical electric field component at the moment of the radiation peak value, thereby calculating the relative distance between the position of the lightning and the position of the local lightning radio frequency sensor. The invention can detect thunder and lightning relatively more accurately, can obtain thunder and lightning data with better precision, and simplifies and facilitates the detection process.
Description
Technical Field
The invention relates to a lightning detection method and device for a power supply area.
Background
At present, the global climate change trend is obvious, the extreme climate is increased, and the lightning activity is more frequent and violent than before. Statistically, lightning activity increased by 12.9% over the world in the last decade. The development of lightning along with an electric power system is always a great natural factor which endangers the safety of a power grid and causes power failure in a local or large range. About 30% of the power failure accidents in the United states every year, and more than half of the power grid disturbances and power failure accidents in European regions are caused by lightning. In China, about 40% -70% of power grid accidents are related to lightning in different areas. In some areas with much thunder, lightning stroke is a main factor causing the tripping of lines of 10kV and above, and causing the loss of electricity of users.
The construction of the smart grid is becoming more and more intensive in recent years as a basic national strategic measure. The development of smart grids does not mean that the grids will be sufficiently advanced and reliable to ignore the effects of lightning. In fact, due to factors such as a large amount of new energy access, bidirectional tide of a distributed power supply, complex power grid structure and the like, under extreme conditions such as a load peak and the like, power failure of a local area or a large area can be caused by thunder and lightning, and the factors become important factors for triggering the power grid accident cascade effect. The stable operation of the smart grid in the thunder and lightning weather depends on whether more reliable and flexible power grid lightning protection measures can be adopted or not so as to ensure the safety and stability of the smart grid. Accurate detection of lightning is the basis for lightning protection.
Under increasingly polarized lightning climates, more reliable and flexible lightning protection measures for the power grid are still needed for the smart power grid and certain special power supply areas with higher reliability requirements, so that the safety and the stability of the smart power grid are guaranteed. Meanwhile, an accurate and efficient early warning system is also needed to provide a reliable data source for a new lightning protection mode, and powerful guarantee is provided under the new situation of rapid development of a green smart power grid.
Disclosure of Invention
The invention aims to provide a method and a device for detecting thunder and lightning aiming at a power supply area, which can accurately detect the thunder and lightning so as to provide support for the thunder and lightning and ensure the safe operation of a power grid.
In order to achieve the purpose, the invention adopts the technical scheme that:
a lightning detection method for a power supply area is used for lightning detection of a specified power supply area, and comprises the following steps:
arranging a local lightning radio frequency sensor in the power supply area and/or the periphery of the power supply area, respectively detecting a very low frequency signal and a very high frequency signal radiated by lightning through the local lightning radio frequency sensor, determining the peak value radiation moment and the first return stroke peak value moment of the lightning, sampling a north-south component of a magnetic field, an east-west component of the magnetic field and a vertical electric field component of the position where the local lightning radio frequency sensor is located at the peak value radiation moment, and re-sampling the vertical electric field component of the position where the local lightning radio frequency sensor is located at the first return stroke peak value moment;
judging the direction of lightning by utilizing the north-south component and the east-west component of the magnetic field at the position of the local lightning radio frequency sensor;
and calculating the ratio of the vertical electric field component of the position of the local lightning radio frequency sensor at the first back-strike peak moment to the vertical electric field component at the emission peak moment, and calculating the relative distance between the lightning generation position and the position of the local lightning radio frequency sensor according to the ratio and the inverse relation between the ratio and the lightning transmission range.
Preferably, the local lightning radio frequency sensor comprises a three-way signal receiving channel.
Preferably, a set domain mu is preset, and the vertical electric field component of the position of the local lightning radio frequency sensor at the first back-strike peak moment is sampled in the set domain mu.
Preferably, the diameter of the detection range of the local lightning radio frequency sensor is 200-300 km.
Preferably, a plurality of local lightning radio frequency sensors which are networked are arranged in the power supply area or at the periphery of the power supply area.
A lightning detection device for a power supply area, comprising:
the local lightning radio frequency sensor is used for detecting a very low frequency signal and a very high frequency signal radiated by a detected lightning, and a north-south component of a magnetic field, an east-west component of the magnetic field and a vertical electric field component of the position of the local lightning radio frequency sensor;
the computer is communicated with the local lightning radio frequency sensor and is used for determining the radiation peak value moment and the first return peak value moment of lightning, sampling north-south components, east-west components and vertical electric field components of a magnetic field of the position of the local lightning radio frequency sensor at the radiation peak value moment, sampling vertical electric field components of the position of the local lightning radio frequency sensor at the first return peak value moment, judging the lightning generating direction by utilizing the north-south components and east-west components of the magnetic field of the position of the local lightning radio frequency sensor, calculating the ratio of the vertical electric field components of the position of the local lightning radio frequency sensor at the first return peak value moment to the vertical electric field components at the radiation peak value moment, and calculating the relative ratio of the lightning generating position to the position of the local lightning radio frequency sensor according to the ratio and the inverse ratio relation between the ratio and the lightning transmission range Distance.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the invention can detect thunder and lightning relatively more accurately, can obtain thunder and lightning data with better precision, and simplifies and facilitates the detection process.
Detailed Description
The present invention will be further described with reference to the following examples.
The first embodiment is as follows: a lightning detection method for a power supply area for detecting lightning in a specified power supply area specifically comprises the following steps:
1. the local lightning radio frequency sensor is arranged in and/or around the power supply area to be detected, and usually a plurality of networked local lightning radio frequency sensors can be arranged to improve the prediction accuracy. The local lightning radio frequency sensor comprises three signal receiving channels. The diameter of the detection range of the local lightning radio frequency sensor is usually 200-300km, so that the local lightning radio frequency sensor is distinguished from the wide lightning radio frequency sensor, and the scheme is suitable for a local power distribution network in a small local power supply area, can be a common intelligent power distribution network, is suitable for a special power supply area with higher requirement on reliability, is also suitable for an intelligent power grid containing more distributed power supplies, micro-grids and high-permeability renewable energy sources, and is also suitable for an intelligent power grid with a reasonable network topology structure, higher automation degree, smaller geographic area coverage and relatively concentrated distribution.
When thunder occurs, the local lightning radio frequency sensor is used for respectively detecting the very low frequency signal and the very high frequency signal radiated by the thunder, so that the radiation peak time and the first return stroke peak time of the thunder are determined. And simultaneously detecting the north-south component, the east-west component and the vertical electric field component of the magnetic field at the position of the local lightning radio frequency sensor, sampling the north-south component, the east-west component and the vertical electric field component of the magnetic field at the position of the local lightning radio frequency sensor at the moment of the emission peak value, and re-sampling the vertical electric field component at the position of the local lightning radio frequency sensor at the moment of the first return stroke peak value.
2. After the data are obtained, analytical calculation is carried out.
Firstly, the magnetic orientation technology is carried out by utilizing the north-south component and the east-west component of the magnetic field of the position of the local lightning radio frequency sensor to judge the lightning direction.
And then calculating the ratio (namely the relative electric field change rate REFC) of the vertical electric field component of the position of the local lightning radio frequency sensor at the moment of the first back-striking peak value to the vertical electric field component at the moment of the radiation peak value, and calculating the relative distance between the lightning generating position and the position of the local lightning radio frequency sensor according to the calculated ratio and the inverse relation between the ratio and the lightning transmission range. Usually, a reasonable set domain mu can be preset, and the vertical electric field component of the position of the local lightning radio frequency sensor at the first back-strike peak moment can be sampled in the set domain mu.
When the position of the lightning and the distance between the position of the local lightning radio frequency sensor and the position of the lightning are obtained, the position of the lightning can be determined, and the lightning detection is completed.
Example two: a lightning detection device for a power supply area includes a number of local lightning RF sensors and a computer in communication with each local lightning RF sensor.
The local lightning radio frequency sensor is used for detecting a very low frequency signal and a very high frequency signal radiated by lightning and detecting a north-south component of a magnetic field, an east-west component of the magnetic field and a vertical electric field component of the position of the local lightning radio frequency sensor.
The computer is used for determining the moment of the radiation peak value of thunder and lightning and the moment of the first return peak value, sampling north and south components of a magnetic field, east and west components and a vertical electric field component of the position of the local thunder and lightning radio frequency sensor at the moment of the radiation peak value, sampling the vertical electric field component of the position of the local thunder and lightning radio frequency sensor at the moment of the first return peak value, judging the direction of the thunder and lightning by utilizing the north and south components and east and west components of the magnetic field at the position of the local thunder and lightning radio frequency sensor, calculating the ratio of the vertical electric field component of the position of the local thunder and lightning radio frequency sensor at the moment of the first return peak value to the vertical electric field component at the moment of the radiation peak value, and calculating the relative distance between the position of the thunder and the position of the local thunder and lightning radio frequency.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (5)
1. A lightning detection method aiming at a power supply area is used for detecting lightning in a specified power supply area, and is characterized in that: the lightning detection method aiming at the power supply area comprises the following steps:
arranging a plurality of local lightning radio frequency sensors which are connected with the network in the power supply area and/or the periphery of the power supply area, respectively detecting a very low frequency signal and a very high frequency signal radiated by lightning through the local lightning radio frequency sensors, determining the peak radiation moment and the peak first return attack moment of the lightning, sampling north and south components of a magnetic field, east and west components of the magnetic field and vertical components of an electric field at the position of the local lightning radio frequency sensors at the peak radiation moment, and re-sampling the vertical components of the electric field at the position of the local lightning radio frequency sensors at the peak first return attack moment;
judging the direction of lightning by utilizing the north-south component and the east-west component of the magnetic field at the position of the local lightning radio frequency sensor;
and calculating the ratio of the vertical electric field component of the position of the local lightning radio frequency sensor at the first back-strike peak moment to the vertical electric field component at the emission peak moment, and calculating the relative distance between the lightning generation position and the position of the local lightning radio frequency sensor according to the ratio and the inverse relation between the ratio and the lightning transmission range.
2. The lightning detection method for a power supply area according to claim 1, characterized in that: the local lightning radio frequency sensor comprises three signal receiving channels.
3. The lightning detection method for a power supply area according to claim 1, characterized in that: presetting a set domain mu, and sampling the vertical electric field component of the position of the local lightning radio frequency sensor at the first back-striking peak moment in the set domain mu.
4. The lightning detection method for a power supply area according to claim 1, characterized in that: the diameter of the detection range of the local lightning radio frequency sensor is 200-300 km.
5. A lightning detection device for a power supply area, characterized by: the lightning detection device for the power supply area comprises:
the lightning local radio frequency sensors are used for detecting very low frequency signals and very high frequency signals radiated by lightning and detecting north and south components of a magnetic field, east and west components of the magnetic field and vertical components of an electric field at the positions of the lightning local radio frequency sensors;
the computer is communicated with the local lightning radio frequency sensor and is used for determining the radiation peak value moment and the first return peak value moment of lightning, sampling north-south components, east-west components and vertical electric field components of a magnetic field of the position of the local lightning radio frequency sensor at the radiation peak value moment, sampling vertical electric field components of the position of the local lightning radio frequency sensor at the first return peak value moment, judging the lightning generating direction by utilizing the north-south components and east-west components of the magnetic field of the position of the local lightning radio frequency sensor, calculating the ratio of the vertical electric field components of the position of the local lightning radio frequency sensor at the first return peak value moment to the vertical electric field components at the radiation peak value moment, and calculating the relative ratio of the lightning generating position to the position of the local lightning radio frequency sensor according to the ratio and the inverse ratio relation between the ratio and the lightning transmission range Distance.
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| CN201711307434.6A CN108427040B (en) | 2017-12-11 | 2017-12-11 | Lightning detection method and device for power supply area |
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| CN201711307434.6A CN108427040B (en) | 2017-12-11 | 2017-12-11 | Lightning detection method and device for power supply area |
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| CN1926436A (en) * | 2004-03-04 | 2007-03-07 | 诺基亚公司 | Lightning detection |
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| CN103048570B (en) * | 2012-12-25 | 2015-01-28 | 武汉大学 | Direct effect testing device for lightning current |
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| CN1926436A (en) * | 2004-03-04 | 2007-03-07 | 诺基亚公司 | Lightning detection |
| CN103116083A (en) * | 2013-01-23 | 2013-05-22 | 华中科技大学 | Very low frequency (VLF) / low frequency (LF) frequency range ground lightening detection positioning system |
| CN107271795A (en) * | 2017-07-26 | 2017-10-20 | 国网江苏省电力公司苏州供电公司 | Suitable for the Lightning Warning method of power distribution network |
| CN107271794A (en) * | 2017-07-26 | 2017-10-20 | 国网江苏省电力公司苏州供电公司 | Suitable for the lightning detection method and device of power distribution network |
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Effective date of registration: 20231213 Address after: No. 320 Deluxe Road, Jiaji Town, Qionghai City, Hainan Province, 571442 Patentee after: QIONGHAI POWER SUPPLY BUREAU OF HAINAN POWER GRID Co.,Ltd. Patentee after: Hainan Electric Power Industry Development Co.,Ltd. Address before: 571400 320 luxury Road, Jiaji Town, Qionghai, Hainan Patentee before: QIONGHAI POWER SUPPLY BUREAU OF HAINAN POWER GRID Co.,Ltd. |
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