CN102426301A - Early warning method of overhead transmission line lightning strike flashover - Google Patents
Early warning method of overhead transmission line lightning strike flashover Download PDFInfo
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Abstract
The invention provides an early warning method of overhead transmission line lightning strike flashover. The method comprises the following steps: (1) when an atmospheric electric field instrument detects that a thundercloud electric field exists near a power transmission line, starting an early warning program; (2) inquiring thunder generation information in a segment of time before present time, setting buffer areas in different distances for the power transmission line, and outputting lightning strike early warning information; (3) according to a power transmission line lightning resistant parameter, determining a dangerous lightning current scope of generating lightning strike flashover, inquiring thunder generation information from early warning beginning time to the present time, and using a lightning strike flashover risk assessment program to determine thunder quantity which is in accordance with the dangerous lightning current scope and calculate a ratio between the thunder quantity and thunder generation amount; (4) if the ratio is larger than 0, emitting early warning information and turning to a step (5); if the ratio is 0, not emitting the early warning information, and turning to the step (5); (5) if detecting that the thundercloud electric field around the power transmission line does not disappear, turning to the step (2), and if detecting that the thundercloud electric field around the power transmission line disappears, ending the early warning program.
Description
Technical field
The present invention relates to the transmission line lightning stroke method for early warning, particularly a kind of method for early warning of overhead transmission line lightning stroke flashover, it is applicable to the overhead transmission line lightning stroke flashover early warning of the above electric pressure of electric system 110kV.
Background technology
As everyone knows, thunder and lightning causes a lot of difficulties and inconvenience can for Human's production and life.From ancient times to the present, thunder and lightning has brought heavy disaster with its huge destructive power to human society.Now, electric system is as the human social development key pillars of the national economy, and its overhead transmission line that is used for transmission of electric energy distributes and very extensively subjects to thunderbolt.According to the interrelated data introduction, all very huge by direct loss and remote effect that thunderbolt causes.The applicant finds in the research of being engaged in power system transmission line thunderbolt early warning; When overhead transmission line is struck by lightning; When in case intensity of lightning surpasses the line insulation tolerance; Can cause insulation flashover, thereby possibly cause faults such as the damage of insulation facility, line outage, directly influence the safe reliability of the safe and stable operation and the power consumption of transmission line of electricity.The applicant thinks; The lightning stroke flashover that possibly occur overhead transmission line carries out effective early warning, is to help the electric power system dispatching personnel when thunderbolt is coming, to take positive reply way, Optimization Dispatching power delivery; Reduce loss of supply risk; Simultaneously, the measure that also can help overhead transmission line operation maintenance department to carry out the reply lightning fault is in advance prepared, and improves overhead transmission line damage to crops caused by thunder adaptibility to response.
Existing thunder and lightning method for early warning and system; Mainly be to utilize atmospheric electric field detecting devices, lightening detection equipment and meteorological detection system that the movement tendency of thundercloud is judged; Degree according to thundercloud closes on is sent early warning; Its main deficiency is, just the early warning of thunder and lightning possibility is taken place in the time period in future in certain zone, and does not consider the early warning that causes producing the infringement possibility after the anti-thunder ability that will be directed against concrete protected object is struck by lightning.Should affirm that overhead transmission line has certain anti-thunder ability, have only intensity of lightning current to reach certain certain value, the thunderbolt that it produced within the specific limits just possibly cause overhead transmission line generation lightning stroke flashover.Thus can inference, be to carry out effective early warning only to the lightning stroke flashover of overhead transmission line according to the thundercloud movement tendency.The thunder and lightning real-time system for monitoring and pre-warning that the article of delivering on the 2nd phase in 2003 like " Guangxi is meteorological " " Guangxi thunder and lightning real-time system for monitoring and pre-warning " proposes is through the Research of Dynamic Analysis to day part lightning occurrence number, intensity, radar echo intensity and superimposed image, in the hope of realizing real-time monitoring, location and the trend forewarning function to thunder and lightning weather.The applicant finds that under study for action the conception of this thunder and lightning real-time system for monitoring and pre-warning exists not enough, and its early warning effect is unsatisfactory.
Chinese patent document (patent No. 03218711.4) disclosed " simple type thunderstorm prior-warning device "; Mainly constitute by vertical antenna oscillator, two-channel receiver, atmosphere average electric field appearance, stube cable and data collection processor; According to this patent documentation introduction; It can survey thunderstorm produces in 50 kilometer range atmospheric electric field intensity and lightning discharge number of times, the development activity of monitoring thunderstorm.The applicant finds; This device exists significantly not enough: the development activity that can only monitor thunderstorm; Can't provide the intensity of ground sudden strain of a muscle activity, also not consider the anti-thunder ability of concrete protected object, the consequence of its generation is to carry out effective early warning to the overhead transmission line lightning stroke flashover.
Chinese patent document disclosed " regional thunder and lightning method for early warning " (application number 200310116065.4) proposes: at first confirm in the scope of the thunder and lightning emphasis defence area of required monitoring, whether there is the electric field that is produced by thundercloud according to atmospheric electric field detector; Then; Utilize the VHF receiver monitoring in the scope of the thunder and lightning emphasis defence area of required monitoring, whether to have the very high frequency(VHF) electromagnetic radiation as waves that produces by thundercloud; At last, monitor at the same time under the situation of electric field that thundercloud produces and very high frequency(VHF) radiated wave and send lightening alarm.This method is for the complex equipments that overcomes existing very high frequency(VHF) cloud sudden strain of a muscle multi-station positioning system, cost height and adopts interferometric method to locate the shortcoming that has phase ambiguity, and the deficiency that atmospheric electric field detector can occur making a false report proposes.Its conception is that certain feasibility is arranged; But the deficiency that exists is: not to specific protected object; And the anti-thunder ability of not considering concrete protected object, thereby can't realize the possibility of overhead transmission line generation lightning stroke flashover is carried out effective early warning.
Summary of the invention
The objective of the invention is,, improve, propose and study a kind of method for early warning of overhead transmission line lightning stroke flashover to the deficiency of prior art.
Technical solution of the present invention is; Adopt atmospheric electric field detector to survey near the thunder and lightning electric field in the selected or definite scope transmission line of electricity; The thunder and lightning generation information that the utilization lightning location system is collected is foundation with dangerous lightning current, and transmission line lightning stroke flashover is carried out early warning; It is characterized in that; Adopt the early warning program that transmission line lightning stroke flashover is carried out early warning, the early warning program comprises transmission line lightning stroke early warning program, electrical network lightning stroke flashover risk assessment procedures, and the basic step of transmission line lightning stroke flashover being carried out early warning is following:
(1) whether the employing atmospheric electric field detector exists the thundercloud electric field near surveying transmission line of electricity, after having the thundercloud electric field near definite transmission line of electricity, starts transmission line lightning stroke early warning program;
(2) near transmission line of electricity in the selected or scope confirmed, according to the thunder and lightning generation information that lightning location system is collected, the thunder and lightning generation information before the inquiry current time in a period of time; For transmission line of electricity is provided with the buffer zone of different distance, confirm to comprise the minimal buffering district of arbitrary thunder and lightning in the Query Result; And with the definite thunderbolt of this buffer size warning level, output thunderbolt warning level information;
(3) confirm to make it that dangerous lightning current scope of lightning stroke flashover takes place according to the anti-thunder parameter of transmission line of electricity; Thunder and lightning generation information according to the lightning location system collection; Inquiry begins the thunder and lightning generation information to current time from early warning in the certain limit near transmission line of electricity; Start electrical network lightning stroke flashover risk assessment procedures; Adopting electrical network lightning stroke flashover risk assessment procedures to handle the lightning information that inquires, is that foundation confirms to meet the thunder and lightning generation quantity of dangerous lightning current scope in real time with the lightning current, and calculates this thunder and lightning generation quantity and the ratio that inquires thunder and lightning generation total quantity;
(4) if this thunder and lightning generation quantity and the ratio that inquires thunder and lightning generation total quantity are greater than 0 in the basic step (3), be that early warning value sends early warning information then, change step (5) then over to this ratio; If this thunder and lightning generation quantity is 0 with the ratio that inquires thunder and lightning generation total quantity in the basic step (3), then do not send early warning information, change step (5) then over to;
(5) near thundercloud electric field does not disappear if atmospheric electric field detector detects transmission line of electricity, then forwards step (2) to; If the thundercloud electric field disappeared near atmospheric electric field detector detected transmission line of electricity, then finish this early warning, and finish electrical network lightning stroke flashover risk assessment procedures and transmission line lightning stroke early warning program.
It is characterized in that thunderbolt warning level information includes the information of warning red, warning yellow, blue alarm Three Estate.
It is characterized in that whether atmospheric electric field detector exists the thundercloud electric field threshold value of confirming that the thundercloud electric field exists to be set to atmospheric electric field detector near surveying transmission line of electricity.
It is characterized in that atmospheric electric field detector judges that threshold value that the thundercloud electric field exists is the minimum field strength absolute value setting under thunder and lightning being arranged a situation arises according to different regions (Plain, level land, no point effect) under the canonical measure state.
It is characterized in that, be provided with to atmospheric electric field detector and confirm that the threshold value that the thundercloud electric field exists is ± 0.4kv/m.
Advantage of the present invention is that conception rationally, and is simple and feasible, has good operability and practicality.The actual conditions and the lightning location system that exist through the thundercloud electric field that utilizes atmospheric electric field detector to detect obtain thunder and lightning generation information; Start transmission line lightning stroke early warning program; And to this specific object of protection of overhead transmission line; Consider the anti-thunder ability of transmission line of electricity simultaneously, realize effective early warning of overhead transmission line lightning stroke flashover phenomenon.The present invention surveys and confirms whether to exist near the transmission line of electricity of protected area the electric field of thundercloud induction through atmospheric electric field detector; Utilize the transmission line lightning stroke early warning program in the lightning monitoring net to carry out the protected area inquiry of spot sudden strain of a muscle with startup; Begin the thunder and lightning quantity ratios in the current time dangerous currents scope from early warning in the statistical regions; And send this circuit lightning stroke flashover early warning information according to this ratio; Consequently, can solve " can only monitor the development activity of thunderstorm, can't provide the intensity of ground sudden strain of a muscle activity; do not consider the anti-thunder ability of concrete protected object, can't carry out the problem of early warning " that exists in the present thunder and lightning early warning well to the overhead transmission line lightning stroke flashover.
Description of drawings
The early warning step signal schematic diagram that Fig. 1, the present invention adopt
Fig. 2, the present invention adopt atmospheric electric field detector monitoring result synoptic diagram
Embodiment
Below, describe embodiments of the invention in detail according to accompanying drawing.
Shown in Figure 2 like Fig. 1; The present invention adopts atmospheric electric field detector to survey near the thunder and lightning electric field in the selected or definite scope transmission line of electricity; The thunder and lightning generation information that the utilization lightning location system is collected is foundation with dangerous lightning current, and transmission line lightning stroke flashover is carried out early warning; Adopt the early warning program that transmission line lightning stroke flashover is carried out early warning, the early warning program comprises transmission line lightning stroke early warning program, electrical network lightning stroke flashover risk assessment procedures.Be to the present invention is directed to a thunderstorm process that was taken place on March 20th, 2009 to carry out transmission line lightning stroke flashover early warning test below.Employing is the early warning instance with span of 220kV overhead transmission line.During practical implementation of the present invention, carry out according to following steps:
The first step is opened near the atmospheric electric field detector of this transmission line of electricity, surveys near the thundercloud electric field that exists the circuit, and the utilization lightning location system obtains and collect thunder and lightning generation information.Whether atmospheric electric field detector exists the thundercloud electric field threshold value of confirming that the thundercloud electric field exists to be set to atmospheric electric field detector near surveying transmission line of electricity.Notice, atmospheric electric field detector judge that threshold value that the thundercloud electric field exists is the minimum field strength absolute value setting under thunder and lightning being arranged a situation arises according to different regions (Plain, level land, no point effect) under the canonical measure state.Usually, to atmospheric electric field detector the threshold value of confirming the existence of thundercloud electric field being set is ± 0.4kv/m.In this example, this atmospheric electric field detector is set and confirms that the threshold value of thundercloud electric field existence is 4kv/m.The atmospheric electric field detector monitoring result that Fig. 2 provides shows; Surpassed threshold value according to the real-time monitor value of atmospheric electric field detector at that time; There is the thundercloud electric field in this explanation near this transmission line of electricity; After having the thundercloud electric field really near definite this transmission line of electricity, start transmission line lightning stroke early warning program, start-up time is at 07:05.
Second step, search near the transmission line of electricity thunder and lightning generation information in the selected or scope confirmed according to lightning location system, provide thunderbolt warning level information.Specific practice is, according near lightning location system thunder and lightning generation information in nearly 10 minutes of the inquiry current time in the 30km scope this span of transmission line of electricity.For transmission line of electricity is provided with the buffer zone of different distance, three buffer zones in circuit 10km, 20km, the 30km scope are set in this example.Then, confirm to comprise the minimal buffering district of arbitrary thunder and lightning in the Query Result, promptly press order from small to large; Search thunder and lightning in 10km, 20km, 30km scope successively; As long as in certain scope, find thunder and lightning and then stop follow-up searching, and confirm that with this buffer size grade (the Three Estate corresponding relation is the 10km-warning red to the thunderbolt warning level in this example, the 20km-warning yellow; The blue alarm of 30km-), output thunderbolt warning level information.
In the 3rd step, apart from beginning the thunder and lightning generation information to current time from early warning in this span 30km scope, Query Result gathers as shown in table 1 in real time according to the lightning location system inquiry.
Table 1: lightning location system monitoring information
Start electrical network lightning stroke flashover risk assessment procedures; Adopt electrical network lightning stroke flashover risk assessment procedures to handle the lightning information that inquires; With the lightning current is that foundation confirms to meet the thunder and lightning generation quantity of dangerous lightning current scope in real time, and calculates this thunder and lightning generation quantity and the ratio that inquires thunder and lightning generation total quantity; Through lightning stroke flashover assessment, this span shielding and counterattack dangerous currents are 12～20kA and >=110kA, also are that lightning current is in this interval thunder and lightning and may makes this circuit generation lightning stroke flashover.Statistics begins to current time from starting early warning, is in the interior thunder and lightning quantity of transmission line of electricity dangerous currents scope and the ratio of thunder and lightning generation total quantity; For example, known by Fig. 2 electric field instrument early warning situation that thunderstorm early warning this time begins at 07:05, so according to table 1, by 07:08:29 sequence number totally 5 thunders and lightnings from 2～6 have taken place constantly, its electric current is respectively 26.5kA ,-46.4kA ,-30.2kA ,-22.1kA ,-16.0kA.In these 5 thunders and lightnings, this transmission line of electricity is had shielding and counterattack harm, promptly electric current belong to 12～20kA or >=110kA interval thunder and lightning only arranged No. 6, thereby thunder and lightning quantity of lightning current scope and the ratio of thunder and lightning generation total quantity are 1/5=20% constantly for these; And the like, can draw each electric network thunderstorm damage early warning result constantly like table 2.
Table 2 electric network thunderstorm damage early warning result
In the 4th step, calculate early warning value constantly at each, if this ratio is greater than 0; With this ratio is that early warning value sends early warning information, if this ratio is 0 (satisfy and be not more than Rule of judgment), does not then send early warning information; And the entering next step, judge whether electrical network lightning stroke flashover risk assessment procedures needs to finish.
The 5th step, check the atmospheric electric field detector Monitoring Data, near thundercloud electric field does not disappear if atmospheric electric field detector detects transmission line of electricity, then proceeds early warning, electrical network lightning stroke flashover risk assessment procedures, transmission line lightning stroke early warning program continues real time execution; If as shown in Figure 2, be returned to the normal atmosphere electric field level gradually at 08:00 moment atmospheric electric field detector probe value, promptly the atmospheric electric field detector probe value has been got back in the threshold value, explains that near the thundercloud electric field of transmission line of electricity disappears, and finishes the early warning program, the end of early warning this time.
Claims (5)
1. the method for early warning of an overhead transmission line lightning stroke flashover; Adopt atmospheric electric field detector to survey near the thunder and lightning electric field in the selected or definite scope transmission line of electricity; The thunder and lightning generation information that the utilization lightning location system is collected is characterized in that, adopts the early warning program that transmission line lightning stroke flashover is carried out early warning; The early warning program comprises transmission line lightning stroke early warning program, electrical network lightning stroke flashover risk assessment procedures, and the basic step of transmission line lightning stroke flashover being carried out early warning is following:
(1) whether the employing atmospheric electric field detector exists the thundercloud electric field near surveying transmission line of electricity, after having the thundercloud electric field near definite transmission line of electricity, starts transmission line lightning stroke early warning program;
(2) near transmission line of electricity in the selected or scope confirmed, according to the thunder and lightning generation information that lightning location system is collected, the thunder and lightning generation information before the inquiry current time in a period of time; For transmission line of electricity is provided with the buffer zone of different distance, confirm to comprise the minimal buffering district of arbitrary thunder and lightning in the Query Result; And with the definite thunderbolt of this buffer size warning level, output thunderbolt warning level information;
(3) confirm to make it that dangerous lightning current scope of lightning stroke flashover takes place according to the anti-thunder parameter of transmission line of electricity; Thunder and lightning generation information according to the lightning location system collection; Inquiry begins the thunder and lightning generation information to current time from early warning in the certain limit near transmission line of electricity; Start electrical network lightning stroke flashover risk assessment procedures; Adopting the lightning stroke flashover risk assessment procedures to handle the lightning information that inquires, is that foundation confirms to meet the thunder and lightning generation quantity of dangerous lightning current scope in real time with the lightning current, and calculates this thunder and lightning generation quantity and the ratio that inquires thunder and lightning generation total quantity;
(4) if this thunder and lightning generation quantity and the ratio that inquires thunder and lightning generation total quantity are greater than 0 in the basic step (3), be that early warning value sends early warning information then, change step (5) then over to this ratio; If this thunder and lightning generation quantity is 0 with the ratio that inquires thunder and lightning generation total quantity in the basic step (3), then do not send early warning information, change step (5) then over to;
(5) near thundercloud electric field does not disappear if atmospheric electric field detector detects transmission line of electricity, then forwards step (2) to; If the thundercloud electric field disappeared near atmospheric electric field detector detected transmission line of electricity, then finish this early warning, and finish transmission line lightning stroke early warning program.
2. the method for early warning of a kind of overhead transmission line lightning stroke flashover according to claim 1 is characterized in that, thunderbolt warning level information includes the information of warning red, warning yellow, blue alarm Three Estate.
3. the method for early warning of a kind of overhead transmission line lightning stroke flashover according to claim 1 is characterized in that, whether atmospheric electric field detector exists the thundercloud electric field threshold value of confirming that the thundercloud electric field exists to be set to atmospheric electric field detector near surveying transmission line of electricity.
4. the method for early warning of a kind of overhead transmission line lightning stroke flashover according to claim 3; It is characterized in that atmospheric electric field detector judges that threshold value that the thundercloud electric field exists is thunder and lightning to be arranged a situation arises following minimum field strength absolute value setting under the canonical measure state according to different regions.
5. the method for early warning of a kind of overhead transmission line lightning stroke flashover according to claim 3 is characterized in that, is provided with to atmospheric electric field detector and confirms that the threshold value that the thundercloud electric field exists is ± 0.4kv/m.
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| CN102692656A (en) * | 2012-06-08 | 2012-09-26 | 河源职业技术学院 | Thunderstorm data processing method and system |
| CN103837769A (en) * | 2014-02-27 | 2014-06-04 | 广西电网公司电力科学研究院 | Lightening damage early-warning method and system for electric transmission line |
| CN106651031A (en) * | 2016-12-21 | 2017-05-10 | 山东大学 | Lightning stroke flashover early warning method and system based on historical information |
| WO2018018840A1 (en) * | 2016-07-29 | 2018-02-01 | 国网电力科学研究院武汉南瑞有限责任公司 | Transmission line lightning monitoring and early warning method based on small radar |
| CN111583586A (en) * | 2020-04-03 | 2020-08-25 | 武汉天宏防雷检测中心发展有限公司 | Lightning monitoring and early warning method and device |
| CN111987691A (en) * | 2020-08-06 | 2020-11-24 | 珠海格力电器股份有限公司 | Equipment power-off protection method based on thunderstorm early warning, storage medium and electronic equipment |
| CN112578232A (en) * | 2019-09-30 | 2021-03-30 | 北京金风慧能技术有限公司 | Lightning early warning method and lightning early warning device of wind generating set |
| CN113820535A (en) * | 2021-09-15 | 2021-12-21 | 国网江苏省电力有限公司盐城供电分公司 | High-voltage power transmission and distribution line lightning stroke detection method based on environmental factors |
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| CN102621414A (en) * | 2012-03-16 | 2012-08-01 | 国网电力科学研究院武汉南瑞有限责任公司 | Method and system for comprehensively and synchronously observing lightning stroke discharge |
| CN102692656A (en) * | 2012-06-08 | 2012-09-26 | 河源职业技术学院 | Thunderstorm data processing method and system |
| CN102692656B (en) * | 2012-06-08 | 2013-10-30 | 河源职业技术学院 | Thunderstorm data processing method and system |
| CN103837769A (en) * | 2014-02-27 | 2014-06-04 | 广西电网公司电力科学研究院 | Lightening damage early-warning method and system for electric transmission line |
| CN103837769B (en) * | 2014-02-27 | 2016-09-21 | 广西电网公司电力科学研究院 | A kind of transmission line of electricity damage to crops caused by thunder method for early warning and system thereof |
| WO2018018840A1 (en) * | 2016-07-29 | 2018-02-01 | 国网电力科学研究院武汉南瑞有限责任公司 | Transmission line lightning monitoring and early warning method based on small radar |
| CN106651031A (en) * | 2016-12-21 | 2017-05-10 | 山东大学 | Lightning stroke flashover early warning method and system based on historical information |
| CN106651031B (en) * | 2016-12-21 | 2019-10-22 | 山东大学 | Lightning stroke flashover method for early warning and system based on historical information |
| CN112578232A (en) * | 2019-09-30 | 2021-03-30 | 北京金风慧能技术有限公司 | Lightning early warning method and lightning early warning device of wind generating set |
| CN112578232B (en) * | 2019-09-30 | 2023-10-27 | 北京金风慧能技术有限公司 | Lightning early warning method and lightning early warning equipment of wind generating set |
| CN111583586A (en) * | 2020-04-03 | 2020-08-25 | 武汉天宏防雷检测中心发展有限公司 | Lightning monitoring and early warning method and device |
| CN111987691A (en) * | 2020-08-06 | 2020-11-24 | 珠海格力电器股份有限公司 | Equipment power-off protection method based on thunderstorm early warning, storage medium and electronic equipment |
| CN111987691B (en) * | 2020-08-06 | 2022-11-22 | 珠海格力电器股份有限公司 | Equipment power-off protection method based on thunderstorm early warning, storage medium and electronic equipment |
| CN113820535A (en) * | 2021-09-15 | 2021-12-21 | 国网江苏省电力有限公司盐城供电分公司 | High-voltage power transmission and distribution line lightning stroke detection method based on environmental factors |
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