CN107037269A - A kind of power transmission line lightning shielding method for early warning - Google Patents
A kind of power transmission line lightning shielding method for early warning Download PDFInfo
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- 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
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Abstract
A kind of power transmission line lightning shielding method for early warning of disclosure, methods described includes：Obtain the electric-field intensity of protected area；Electric field accumulation difference is calculated according to the electric-field intensity；Judge whether the electric field accumulation difference is more than electric field accumulation differential threshold, according to judged result, obtain the graduation of electric-field intensity cumulative error；If the electric field accumulation difference is more than electric field accumulation differential threshold, thunder and lightning positioning information is obtained；According to the thunder and lightning positioning information, determine thunder and lightning apart from warning grade；According to electric-field intensity cumulative error graduation and the thunder and lightning apart from warning grade, Lightning Warning grade is obtained.Whether the application has thunder and lightning appearance according to electric field accumulation difference initial decision, further according to thunder and lightning positioning information, finally gives Lightning Warning grade, and this method accurately carries out Lightning Warning by two links to transmission line of electricity.
Description
Technical field
The application is related to transmission line of electricity lightning protection field, more particularly to a kind of power transmission line lightning shielding method for early warning.
Background technology
Thunder and lightning is one of most common natural phenomena, and the harm to the mankind is very big, the safety of serious threat power system, shadow
Power supply reliability is rung, the No.1 environmental factor of power breakdown is listed in.In recent years, with the increase of net capacity, rack is more next
It is closeer, voltage class and electric power line pole tower also more and more higher, overhead transmission line all over the mountains and plains, by many easily lightning strike areas.
The caused line outage accident of thunderbolt is increasing, and the situation is tense for high pressure overhead power line lightning stroke trip, is caused by thunderbolt
Tripping operation the line is busy that road always trips 40%~70%, operating experience shows, 2011-2015 110kV and above transmission line of electricity are put down
The line is busy that road always trips 59% for equal lightning stroke trip.
Yunnan Power System transmission line lightning stroke failure happens occasionally, and thunder and lightning has the features such as endanger greatly and randomness is strong,
Tripping rate with lightning strike accounts for the 70% of total tripping operation number during top in 2013.High risks are brought to operation of power networks.Yunnan Power System is made
For " transferring electricity from the west to the east ", the body supports person of " cloud electricity is sent outside ", its safe and stable operation is to building strong intelligent grid strategic objective
With positive impetus, this also proposes higher requirement to Yunnan Power System lightning monitoring and protective capacities.
Existing thunder and lightning defense technique possesses lightening activity still in more passive situation, conventional lightning monitoring with mean of defense
Real-time monitoring and ex-post analysis ability, but requirement of the power network to initiative defense technique can not be fully met, it is impossible to realize thunder
Sudden and violent early warning, it is impossible to instruct system to take the necessary measures, reduces loss.
The content of the invention
The purpose of the application is to provide a kind of power transmission line lightning shielding method for early warning, so that solve in the prior art can not be to thunder
The problem of electricity carries out early warning.
A kind of power transmission line lightning shielding method for early warning provided according to the embodiment of the present application, methods described includes：
Obtain the electric-field intensity of protected area；
Electric field accumulation difference is calculated according to the electric-field intensity；
Judge whether the electric field accumulation difference is more than electric field accumulation differential threshold, according to judged result, obtain electric-field strength
Spend cumulative error graduation；
If the electric field accumulation difference is more than electric field accumulation differential threshold, thunder and lightning positioning information is obtained；
According to the thunder and lightning positioning information, determine thunder and lightning apart from warning grade；
According to electric-field intensity cumulative error graduation and the thunder and lightning apart from warning grade, Lightning Warning grade is obtained.
In the first possible implementation, methods described also includes：According to historical data, accumulation difference threshold is corrected
Value.
In second of possible implementation, the electric field accumulation difference is calculated according to the following equation：
In formula, t0At the time of arbitrary neighborhood being represented with t respectively；Interval time is the sampling interval duration 1s of electric field instrument；E
(t0) it is t0The electric-field intensity at moment, E (t) is the electric-field intensity of t；E (t) ' is electric field accumulation difference.
It is described according to historical data in the third possible implementation with reference to the first possible implementation, repair
Positive accumulation differential threshold includes：
The peak and minimum of electric field accumulation difference described in statistical history data；
Equal difference divides 100 scopes in the range of minimum and peak；
Inverting Lightning Warning process obtains the rate of failing to report and rate of false alarm of Lightning Warning to 100 ranging assessments；
According to the rate of failing to report and rate of false alarm, accumulation differential threshold is corrected.
It is described according to rate of failing to report and wrong report in the 4th kind of possible implementation with reference to the third possible implementation
Rate, using following formula, the method for amendment accumulation differential threshold includes：
F (x, y)=ux+ (1-u) y
In formula, x is rate of failing to report；Y is rate of false alarm；U ∈ (0,1) are balance factor；
The corresponding threshold value of f (x, y) minimum value is revised accumulation differential threshold.
It is described to be classified according to electric-field intensity cumulative error with thunder and lightning apart from early warning etc. in the 5th kind of possible implementation
Level, obtaining Lightning Warning grade includes：
According to electric-field intensity cumulative error graduation and the thunder and lightning apart from warning grade, thunder and lightning combination grade is obtained；
Grade is combined according to thunder and lightning, Lightning Warning grade is obtained.
A kind of power transmission line lightning shielding method for early warning provided from above technical scheme, the application, methods described includes：
Obtain the electric-field intensity of protected area；Electric field accumulation difference is calculated according to the electric-field intensity；Judge the electric field cumulative error
Divide and whether be more than electric field accumulation differential threshold, according to judged result, obtain the graduation of electric-field intensity cumulative error；If the electric field
Accumulation difference is more than electric field accumulation differential threshold, then obtains thunder and lightning positioning information；According to the thunder and lightning positioning information, thunder and lightning is determined
Apart from warning grade；According to electric-field intensity cumulative error graduation and the thunder and lightning apart from warning grade, Lightning Warning is obtained
Grade.Whether the application has thunder and lightning appearance, further according to thunder and lightning positioning information, finally give according to electric field accumulation difference initial decision
Lightning Warning grade, this method accurately carries out Lightning Warning by two links to transmission line of electricity.
Brief description of the drawings
, below will be to institute in embodiment in order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art
The accompanying drawing needed to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the application
Example, for those of ordinary skill in the art, on the premise of not paying creative work, can also be obtained according to these accompanying drawings
Obtain other accompanying drawings.
A kind of flow chart for power transmission line lightning shielding method for early warning that Fig. 1 provides for the embodiment of the present application；
The flow chart for the amendment accumulation differential threshold that Fig. 2 provides for the embodiment of the present application.
Embodiment
With reference to Fig. 1, a kind of flow chart of the power transmission line lightning shielding method for early warning provided it illustrates the embodiment of the present application should
Method is not limited to transmission line of electricity voltage class or transmission capacity, the described method comprises the following steps：
Step S101, obtains the electric-field intensity of protected area；
Specifically, protected area described herein refers to transmission line of electricity region, for example, high pressure all over the mountains and plains
Overhead transmission line region is protected area.There is electric field in air, when occurring Thunderstorm Weather, atmospheric electricity field strength
Irregular fluctuation occurs in degree.Based on this, atmospheric electric field detector is installed near protected area, atmospheric electric field detector is monitored in real time
Atmospheric electric field Strength Changes outside protected area in the range of about 20km, obtained electric-field intensity data provide number for Lightning Warning
According to basis.
Step S102, electric field accumulation difference is calculated according to the electric-field intensity；Step S103, judges the electric field cumulative error
Divide and whether be more than electric field accumulation differential threshold, according to judged result, obtain the graduation of electric-field intensity cumulative error；
It is worth noting that, the electric-field intensity cumulative error in the application is classified for the change for characterizing atmospheric electric field intensity
Situation.For example, when the atmospheric electric field accumulation difference is more than atmospheric electric field accumulation differential threshold, the electric-field intensity cumulative error
Classify as 1, now illustrate that atmospheric electric field Strength Changes are very big, atmospheric electric field is frequently beated, it is preliminary to judge there is thunder and lightning appearance.When
When the atmospheric electric field accumulation difference is less than or equal to atmospheric electric field accumulation differential threshold, the electric-field intensity cumulative error graduation
For 0, illustrate that atmospheric electric field Strength Changes less, occur without thunder and lightning.And then continue to monitor atmospheric electric field Strength Changes.
Step S104, if the electric field accumulation difference is more than electric field accumulation differential threshold, that is, the electric-field intensity
When cumulative error graduation is 1, then thunder and lightning positioning information is obtained；The electric field accumulation difference is compared with electric field accumulation differential threshold
More tentatively determine whether the thunder and lightning stage, due to atmospheric electric field detector failure the problems such as cause preliminary judged result to differ to fix
Really, thus need further determine whether thunder and lightning really occur, reaffirm that situation occurs in thunder and lightning by thunder and lightning positioning information.
Thunder and lightning positioning information, is referred here to, the information monitored by lightning location system, including：When thunder and lightning occurs
Between, thunder and lightning occurs and the information, the present embodiment such as the distance (can be referred to as lighting location distance) at protected area center and lightning current
It is described by lighting location distance emphatically.
After tentatively judging to have thunder and lightning appearance according to atmospheric electric field accumulation difference, lightning location system is called to inquire about 10min
A situation arises for interior thunder and lightning.The information of lightning location system, is the lighting location number according to actual monitoring before selection inquiry 10min
Determined according to analysis, inquiry is less than lightning location system information before 10min, be not enough to determine the feature of lightening activity；Inquiry is big
In lightning location system information before 10min, the volumes of searches of lightning location system can be increased, analysis efficiency is reduced.
Step S105, according to the thunder and lightning positioning information, judges thunder and lightning apart from warning grade；
For example, using lighting location apart from D as reference, setting thunder and lightning is apart from warning grade, as shown in table 1.If lighting location
System queries then determine corresponding thunder and lightning apart from warning grade to thunder and lightning with reference to table 1, if the lighting location inquired is apart from small
In 20km, then thunder and lightning is 3 grades apart from warning grade, if lighting location distance is 20~30km, then thunder and lightning is apart from warning grade
For 2 grades, if lighting location distance is 30~40km, thunder and lightning is 1 grade apart from warning grade, if lighting location is apart from ＞ 40km,
Then thunder and lightning is 0 grade apart from warning grade.
The thunder and lightning of table 1 is divided apart from warning grade
| Grade | Lighting location is apart from D (km) |
| 0 | 40≥D |
| 1 | 30≤D ＜ 40 |
| 2 | 20≤D ＜ 30 |
| 3 | 20 ＜ D |
Step S106, according to electric-field intensity cumulative error graduation and the thunder and lightning apart from warning grade, obtains thunder and lightning
Warning grade.
Specifically, obtaining the method for Lightning Warning grade includes：
According to electric-field intensity cumulative error graduation and the thunder and lightning apart from warning grade, thunder and lightning combination grade is obtained；
Grade is combined according to thunder and lightning, Lightning Warning grade is obtained.
If thunder and lightning is equal to apart from warning grade threshold value apart from warning grade, the thunder and lightning combination grade is equal to the electricity
The graduation of field intensity cumulative error subtracts 1.
For example, it is described apart from warning grade threshold value be 0 when, measure lighting location distance >=40km, now thunder and lightning distance in advance
Alert grade be equal to it is described apart from warning grade threshold value, it is explainable in fact, thunder and lightning does not occur near protected area, so
Lightning Warning grade is reduced.
If thunder and lightning is more than apart from warning grade threshold value apart from warning grade, thunder is inquired in lightning location system
Electricity, thunder and lightning combination grade is that electric-field intensity cumulative error graduation and the thunder and lightning add 2 apart from warning grade sum.
With reference to the content of above-described embodiment, therefore thunder and lightning combination grade can be obtained into 7 kinds of (0~6) combined results.With reference to right
The result of historical data statistical analysis, by Lightning Warning grade classification is 4 grades by the probability of possibility occurrence.Such as the institute of table 2
Show, when thunder and lightning combination grade is equal to 0 or 1, then the probability for occurring thunder and lightning is less than 25%, and Lightning Warning grade is 1 grade；If thunder and lightning group
Close grade and be equal to 2, then the probability and Lightning Warning grade for occurring thunder and lightning are respectively 25%~50% and 2 grades；When thunder and lightning combination etc.
Level is equal to 3 or 4, then the probability for occurring thunder and lightning is 50%~75%, and Lightning Warning grade is 3 grades；If thunder and lightning combination grade is equal to 5
Or 6, then the probability and Lightning Warning grade for occurring thunder and lightning are respectively to be more than 75% and 4 grades.Letter corresponding to Lightning Warning grade
Number be respectively：Blue (no thunder and lightning), yellow early warning, orange warning and red early warning.
The Lightning Warning grade classification of table 2
Lightning Warning is in critical positions in the research, detection and protection of thunder and lightning, can be in advance to interior pole can for a period of time
The Grid that can occur thunderstorm sends alarm, points out O＆M, maintainer to Engineering Zones such as construction, maintenance, livewire work
Carry out thunderstorm and close on early warning, important information is safely provided for life when ensureing production, maintenance, construction.
Step S107, methods described also includes：According to historical data, accumulation differential threshold is corrected.
The accumulation differential threshold used before the historical data refers to during all Lightning Warnings, and in this cumulative error
The rate of failing to report and rate of false alarm divided under threshold value.
The effect of amendment accumulation differential threshold is to reduce the rate of failing to report and rate of false alarm of Lightning Warning, more accurately predicts thunder and lightning
A situation arises.If correcting the higher or relatively low rate of failing to report that may all increase Lightning Warning and the wrong report that accumulation differential threshold is chosen
Rate.
A kind of power transmission line lightning shielding method for early warning provided from above technical scheme, the application, methods described includes：
Obtain the electric-field intensity of protected area；Electric field accumulation difference is calculated according to the electric-field intensity；Judge the electric field cumulative error
Divide and whether be more than electric field accumulation differential threshold, according to judged result, obtain the graduation of electric-field intensity cumulative error；If the electric field
Accumulation difference is more than electric field accumulation differential threshold, then obtains thunder and lightning positioning information；According to the thunder and lightning positioning information, thunder and lightning is determined
Apart from warning grade；According to electric-field intensity cumulative error graduation and the thunder and lightning apart from warning grade, Lightning Warning is obtained
Grade.Whether the application has thunder and lightning appearance, further according to thunder and lightning positioning information, finally give according to electric field accumulation difference initial decision
Lightning Warning grade, this method accurately carries out Lightning Warning by two links to transmission line of electricity.
Step S102 can select following formula and calculate the atmospheric electric field accumulation difference：
In formula, t0At the time of arbitrary neighborhood being represented with t respectively；Interval time is the sampling interval duration 1s of electric field instrument；E
(t0) it is t0The electric-field intensity at moment, E (t) is the electric-field intensity of t；E (t) ' is electric field accumulation difference.
According to historical data described in step S107, accumulation differential threshold is corrected, is mainly modified when thunder and lightning does not occur,
As shown in Fig. 2 including：
Step S701, the peak and minimum of electric field accumulation difference described in statistical history data；
Step S702, equal difference divides 100 scopes in the range of minimum and peak；
Step S703, inverting Lightning Warning process obtains rate of failing to report (the 1- early warning of Lightning Warning to 100 ranging assessments
Rate) and rate of false alarm.
Inverting Lightning Warning process is to verify whether the atmospheric electric field accumulation differential threshold set originally disclosure satisfy that
Reliably Lightning Warning demand.
Step S704, according to the rate of failing to report and rate of false alarm, corrects accumulation differential threshold.
It is described according to rate of failing to report and rate of false alarm, using following formula, the method for amendment accumulation differential threshold includes：
Assess object function f (x, y)=ux+ (1-u) y
In formula, x is rate of failing to report；Y is rate of false alarm；U ∈ (0,1) are balance factor；
The corresponding electric field accumulation differential threshold of f (x, y) minimum value is revised accumulation differential threshold.
The revised accumulation differential threshold will be updated to history accumulation difference threshold data storehouse, for real-time thunder in future
Electric prealarming process is extracted and used.
The specific values of balance factor u how much will be before inverting Lightning Warning result of calculation determine, be to balance
Final calculation result in function, for the purpose of realizing minimum value.If Inversion Calculation result rate of false alarm is higher than rate of failing to report, to balance
Accounting, obtains function minimum, and u is greater than 0.5, it is on the contrary then less than 0.5.
Low rate of false alarm and the electric field accumulation difference of low rate of failing to report can be more accurately selected according to object function f (x, y) is assessed
Threshold value.
A kind of power transmission line lightning shielding method for early warning provided from above technical scheme, the application, methods described includes：
Obtain the electric-field intensity of protected area；Electric field accumulation difference is calculated according to the electric-field intensity；Judge the electric field cumulative error
Divide and whether be more than electric field accumulation differential threshold, according to judged result, obtain the graduation of electric-field intensity cumulative error；If the electric field
Accumulation difference is more than electric field accumulation differential threshold, then obtains thunder and lightning positioning information；According to the thunder and lightning positioning information, thunder and lightning is determined
Apart from warning grade；According to electric-field intensity cumulative error graduation and the thunder and lightning apart from warning grade, Lightning Warning is obtained
Grade.Whether the application has thunder and lightning appearance, further according to thunder and lightning positioning information, finally give according to electric field accumulation difference initial decision
Lightning Warning grade, this method accurately carries out Lightning Warning by two links to transmission line of electricity.
Those skilled in the art will readily occur to its of the application after considering specification and putting into practice application disclosed herein
Its embodiment.The application is intended to any modification, purposes or the adaptations of the application, these modifications, purposes or
Person's adaptations follow the general principle of the application and including the undocumented common knowledge in the art of the application
Or conventional techniques.Description and embodiments are considered only as exemplary, and the true scope of the application and spirit are by following
Claim is pointed out.
It should be appreciated that the precision architecture that the application is not limited to be described above and is shown in the drawings, and
And various modifications and changes can be being carried out without departing from the scope.Scope of the present application is only limited by appended claim.
Claims (6)
1. a kind of power transmission line lightning shielding method for early warning, it is characterised in that methods described includes：
Obtain the electric-field intensity of protected area；
Electric field accumulation difference is calculated according to the electric-field intensity；
Judge whether the electric field accumulation difference is more than electric field accumulation differential threshold, according to judged result, obtain electric-field intensity and tire out
Product moment is classified；
If the electric field accumulation difference is more than electric field accumulation differential threshold, thunder and lightning positioning information is obtained；
According to the thunder and lightning positioning information, determine thunder and lightning apart from warning grade；
According to electric-field intensity cumulative error graduation and the thunder and lightning apart from warning grade, Lightning Warning grade is obtained.
2. a kind of power transmission line lightning shielding method for early warning according to claim 1, it is characterised in that methods described also includes：
According to historical data, accumulation differential threshold is corrected.
3. a kind of power transmission line lightning shielding method for early warning according to claim 1, it is characterised in that calculate according to the following equation
The electric field accumulation difference：
In formula, t0At the time of arbitrary neighborhood being represented with t respectively；Interval time is the sampling interval duration 1s of electric field instrument；E(t0) be
t0The electric-field intensity at moment, E (t) is the electric-field intensity of t；E (t) ' is electric field accumulation difference.
4. a kind of power transmission line lightning shielding method for early warning according to claim 2, it is characterised in that described according to history number
According to amendment accumulation differential threshold includes：
The peak and minimum of electric field accumulation difference described in statistical history data；
Equal difference divides 100 scopes in the range of minimum and peak；
Inverting Lightning Warning process obtains the rate of failing to report and rate of false alarm of Lightning Warning to 100 ranging assessments；
According to the rate of failing to report and rate of false alarm, accumulation differential threshold is corrected.
5. a kind of power transmission line lightning shielding method for early warning according to claim 4, it is characterised in that it is described according to rate of failing to report and
Rate of false alarm, the method for amendment accumulation differential threshold includes：
F (x, y)=ux+ (1-u) y
In formula, x is rate of failing to report；Y is rate of false alarm；U ∈ (0,1) are balance factor；
The corresponding threshold value of f (x, y) minimum value is revised accumulation differential threshold.
6. a kind of power transmission line lightning shielding method for early warning according to claim 1, it is characterised in that described according to electric-field intensity
Cumulative error is classified and thunder and lightning is apart from warning grade, and obtaining Lightning Warning grade includes：
According to electric-field intensity cumulative error graduation and the thunder and lightning apart from warning grade, thunder and lightning combination grade is obtained；
Grade is combined according to thunder and lightning, Lightning Warning grade is obtained.
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| CN108519523A (en) * | 2018-03-14 | 2018-09-11 | 南京中科九章信息技术有限公司 | Lightning Location Method, system, electronic equipment and storage medium |
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| CN108711266B (en) * | 2018-06-01 | 2019-05-07 | 四川省气候中心 | Thunder and lightning based on atmospheric electric field is short to face local method for early warning |
| CN108899764A (en) * | 2018-07-09 | 2018-11-27 | 安徽硕日光电科技有限公司 | A kind of intelligent lightning protecting method based on multizone regulation |
| CN108898534A (en) * | 2018-07-09 | 2018-11-27 | 安徽硕日光电科技有限公司 | A kind of lightning protection intelligent control system of Regional Linking |
| CN108957595A (en) * | 2018-08-09 | 2018-12-07 | 深圳市雅码科技有限公司 | A kind of lightning forecasting method and system |
| CN109698467A (en) * | 2018-12-19 | 2019-04-30 | 北京无线电计量测试研究所 | A kind of motion in the field lightning protection device with thunder and lightning apart from warning function |
| CN112540235A (en) * | 2019-09-20 | 2021-03-23 | 中国石油化工股份有限公司 | Method and system for correcting lightning early warning threshold value and early warning evaluation method and system |
| CN112540235B (en) * | 2019-09-20 | 2023-02-17 | 中国石油化工股份有限公司 | Method and system for correcting lightning early warning threshold value and early warning evaluation method and system |
| CN110618474A (en) * | 2019-10-24 | 2019-12-27 | 广东省气象公共安全技术支持中心 | Lightning monitoring and early warning method and system based on multi-source data |
| CN113533835A (en) * | 2020-04-20 | 2021-10-22 | 中国石油化工股份有限公司 | Thunder early warning system and method based on thunder and electric field detection technology |
| CN113533834A (en) * | 2020-04-20 | 2021-10-22 | 中国石油化工股份有限公司 | Lightning early warning system and method based on lightning positioning and electric field detection technology |
| CN111983287A (en) * | 2020-08-14 | 2020-11-24 | 宁夏中科天际防雷股份有限公司 | Lightning current monitoring system and method |
| CN112258814A (en) * | 2020-10-23 | 2021-01-22 | 云南电网有限责任公司昭通供电局 | Optimization method of lightning early warning model |
| CN113567763A (en) * | 2021-08-09 | 2021-10-29 | 厦门大恒科技有限公司 | Lightning early warning method and lightning early warning device |
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