CN103048598A - Method and device for evaluating lightning protection performance of back striking of poles and towers of transmission line - Google Patents
Method and device for evaluating lightning protection performance of back striking of poles and towers of transmission line Download PDFInfo
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Abstract
The invention provides a method and a device for evaluating the lightning protection performance of back striking of poles and towers of a transmission line. The method comprises the following steps of: acquiring the waveform data of traveling wave current on a three-phase wire when lightning strikes on the transmission line; analyzing the waveform data of the traveling wave current to obtain the total number of times of lightning strikes on the transmission line and the number of times of lightning strikes on the poles and the towers of the transmission line; calculating a pole striking rate according to the total number of times of the lightning strikes on the transmission line and the number of times of the lightning strikes on the poles and the towers of the transmission line; calculating a back-strike trip rate according to the pole striking rate; and evaluating the lightning protection performance of back striking of the poles and the towers of the transmission line according to the back-strike trip rate. According to the method and the device for evaluating the lightning protection performance of back striking of the poles and the towers of the transmission line, the back-strike trip rate is calculated according to an actual pole striking rate, so that a result is more accurate, the problems of potential safety hazards of the poles and the towers of the transmission line are effectively solved, and transmission line operation and maintenance personnel can be better guided to carry out lightning protection work.
Description
Technical field
The present invention relates to field of power, particularly relate to a kind of electric power line pole tower and strike back the appraisal procedure of anti-thunder performance and the apparatus for evaluating that a kind of electric power line pole tower is strikeed back anti-thunder performance.
Background technology
When the evaluation electric power line pole tower was strikeed back anti-thunder performance, the counterattack trip-out rate was one of them important indicator.For example, the counterattack trip-out rate, then illustrates and need to transform this shaft tower if find that by calculating certain shaft tower counterattack trip-out rate is too high as a foundation of transmission line of electricity lightning protection assessment and transformation.
In the computation process of counterattack trip-out rate, hitting the bar rate is an important parameter, its reflection be the ratio that thunderbolt shaft tower number of times accounts for thunderbolt circuit sum.The bar rate of hitting that adopts in calculating at present is according to the operating experience statistics, by resulting average data after simple division lightning conducter radical and the landform mostly in the rules (China's Electric Power Industry standard " overvoltage protection of alternating-current electric device and Insulation Coordination " (DL/T620-1997)).Yet, the thunderbolt characteristic of transmission line of electricity is relevant with factors such as the lightening activity in circuit corridor, tower structure, topography and geomorphologies, exist obvious space and time difference, the bar rate of hitting in the rules can't accurately reflect the actual conditions that electric power line pole tower is struck by lightning, thereby so that there is certain error in the counterattack trip-out rate that calculates, also there is larger error in the assessment that finally causes electric power line pole tower to strike back anti-thunder performance, brings hidden danger for the safety of electric power line pole tower.
Summary of the invention
Based on this, be necessary for above-mentioned owing to hit the security hidden trouble that the bar rate is chosen the improper electric power line pole tower that causes, the appraisal procedure and the device that provide a kind of electric power line pole tower to strike back anti-thunder performance.
For achieving the above object, the present invention adopts following technical scheme:
A kind of electric power line pole tower is strikeed back the appraisal procedure of anti-thunder performance, may further comprise the steps:
Travelling wave current Wave data when obtaining transmission line of lightning strike on the three-phase conducting wire;
Described travelling wave current Wave data is analyzed, obtained the number of lightning strokes that shaft tower suffers in total degree that transmission line of electricity is struck by lightning and the transmission line of electricity;
The number of lightning strokes that shaft tower suffers in the total degree that is struck by lightning according to described transmission line of electricity, the transmission line of electricity calculates the bar rate of hitting;
Calculate the counterattack trip-out rate according to the described bar rate of hitting;
According to described counterattack trip-out rate electric power line pole tower being strikeed back anti-thunder performance assesses.
A kind of electric power line pole tower is strikeed back the apparatus for evaluating of anti-thunder performance, comprising:
Data acquisition module, the travelling wave current Wave data when being used for obtaining transmission line of lightning strike on the three-phase conducting wire;
Data analysis module is used for described travelling wave current Wave data is analyzed, and obtains the number of lightning strokes that shaft tower suffers in total degree that transmission line of electricity is struck by lightning and the transmission line of electricity;
Hit bar rate computing module, be used for the total degree that is struck by lightning according to described transmission line of electricity, the number of lightning strokes that the transmission line of electricity shaft tower suffers calculates the bar rate of hitting;
Counterattack trip-out rate computing module is used for calculating the counterattack trip-out rate according to the described bar rate of hitting;
Evaluation module is used for according to described counterattack trip-out rate electric power line pole tower being strikeed back anti-thunder performance and assesses.
Can be found out by above scheme, electric power line pole tower of the present invention is strikeed back appraisal procedure and the device of anti-thunder performance, then the travelling wave current Wave data of accurate recording on the three-phase conducting wire when obtaining transmission line of lightning strike calculates the bar rate of hitting of transmission line of electricity by the statistical study to these data.Because what adopt when carrying out the assessment that electric power line pole tower strikes back anti-thunder performance among the present invention is the actual bar rate of hitting, more accurate with the counterattack trip-out rate result that the bar rate of hitting of reality calculates, the thunderbolt characteristic that more can reflect transmission line of electricity, therefore effectively avoid the security hidden trouble of electric power line pole tower, can instruct better transmission line of electricity operation maintenance personnel to carry out Thunder Protection.
Description of drawings
Fig. 1 is the schematic flow sheet that a kind of electric power line pole tower is strikeed back the appraisal procedure of anti-thunder performance in the embodiment of the invention;
Fig. 2 is the structural representation that a kind of electric power line pole tower is strikeed back the apparatus for evaluating of anti-thunder performance in the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, technical scheme of the present invention is further described.
Referring to shown in Figure 1, a kind of electric power line pole tower is strikeed back the appraisal procedure of anti-thunder performance, may further comprise the steps:
Step S101, then the travelling wave current Wave data when obtaining transmission line of lightning strike on the three-phase conducting wire enters step S102.
As an embodiment preferably, described travelling wave current Wave data can comprise: the positional information that transmission line of electricity is struck by lightning, number of times information etc.In embodiments of the present invention, can the travelling wave current monitoring device be installed on the transmission line of electricity three-phase conducting wire or in transformer station at first, when transmission line of electricity generation electromagnetic distu, can trigger this monitoring device, thereby be recorded to above-mentioned travelling wave current Wave data.
Step S102 analyzes described travelling wave current Wave data, obtains the number of lightning strokes that shaft tower suffers in total degree that transmission line of electricity is struck by lightning and the transmission line of electricity, then enters step S103.
Step S103, the number of lightning strokes that shaft tower suffers in the total degree that is struck by lightning according to described transmission line of electricity, the transmission line of electricity calculates and hits the bar rate, then enters step S104.
As an embodiment preferably, the number of lightning strokes that shaft tower suffers in the above-mentioned total degree that is struck by lightning according to transmission line of electricity, the transmission line of electricity calculates the total degree that number of lightning strokes that the process of hitting the bar rate specifically can comprise the steps: shaft tower in the described transmission line of electricity is suffered is struck by lightning divided by described transmission line of electricity, thereby obtains the described bar rate of hitting.
Step S104 calculates the counterattack trip-out rate according to the described bar rate of hitting, and then enters step S105.
As an embodiment preferably, above-mentioned basis is hit the bar rate and is calculated the process of counterattack trip-out rate and specifically can comprise the steps:
Step S1041, the ground that obtains transmission line of electricity dodges density, lightning conducter height, probability of sustained arc, amplitude of lightning current above the parameters such as probability of strikeing back lightning withstand level;
Step S1042, the parameters such as probability that surpass the counterattack lightning withstand level according to the ground sudden strain of a muscle density, lightning conducter height, probability of sustained arc, the amplitude of lightning current that hit bar rate, transmission line of electricity that obtain are calculated described counterattack trip-out rate.
As an embodiment preferably, in above-mentioned steps S1042, can adopt following formula to calculate described counterattack trip-out rate: n=N
g* h * η * P * g; In the formula, n is counterattack trip-out rate, N
gThe ground of transmission line of electricity dodges density, and h is the lightning conducter height, and η is probability of sustained arc, and P is that amplitude of lightning current surpasses the probability of strikeing back lightning withstand level, and g is for hitting the bar rate.
Step S105 strikes back anti-thunder performance according to described counterattack trip-out rate to electric power line pole tower and assesses.
After calculating the counterattack trip-out rate, electric power line pole tower is strikeed back the process that anti-thunder performance assesses belong to known technology, do not do detailed description among the present invention.
For deepening those skilled in the art to the understanding of technical solution of the present invention, describe below by a concrete example:
Suppose at a certain 220kV transmission line of electricity the travelling wave current monitoring device to be installed, then can obtain the travelling wave current Wave data of this circuit schedule time (in 1 year) by its data monitoring platform.Suppose that by to the statistical study of these data obtaining circuit, to suffer number of lightning strokes be 30 times, the number of times that hits shaft tower is 5 times, and then can calculate and hit the bar rate is 5/30=1/6.Suppose that again this circuit lightning conducter average height h is 24.5m, ground dodges density N
gBe 2.8 times/square kilometre/years, probability of sustained arc η is 0.8, and the probability that lightning current surpasses the counterattack lightning withstand level is 8.4%, therefore adopt formula in the invention process row to calculate after, it is as follows to obtain strikeing back trip-out rate n:
N=N
g* h * η * P * g=2.8 * 24.5 * 0.8 * 0.084 * 1/6=0.77 time/100km.
The counterattack trip-out rate that the above calculates is more accurate than the result of calculation of classic method, more can accurately reflect the actual conditions of circuit.
Corresponding with the appraisal procedure that above-mentioned a kind of electric power line pole tower is strikeed back anti-thunder performance, the apparatus for evaluating that the present invention also provides a kind of electric power line pole tower to strike back anti-thunder performance as shown in Figure 2, comprising:
Hit bar rate computing module 103, be used for the total degree that is struck by lightning according to described transmission line of electricity, the number of lightning strokes that the transmission line of electricity shaft tower suffers calculates the bar rate of hitting;
Counterattack trip-out rate computing module 104 is used for calculating the counterattack trip-out rate according to the described bar rate of hitting;
As an embodiment preferably, described hitting in the bar rate computing module 103 can comprise:
The division arithmetic module, the number of lightning strokes that is used for described transmission line of electricity shaft tower is suffered obtains the described bar rate of hitting divided by the total degree that described transmission line of electricity is struck by lightning.
As an embodiment preferably, can comprise in the described counterattack trip-out rate computing module 104:
Parameter acquisition module is dodged density, lightning conducter height, probability of sustained arc, amplitude of lightning current above the parameters such as probability of strikeing back lightning withstand level for the ground that obtains transmission line of electricity;
The parameter application module is used for surpassing the parameters such as probability of strikeing back lightning withstand level and calculating described counterattack trip-out rate according to the ground sudden strain of a muscle density, lightning conducter height, probability of sustained arc, the amplitude of lightning current that hit bar rate, transmission line of electricity that obtain.
As an embodiment preferably, described parameter application module can adopt following formula to calculate described counterattack trip-out rate: n=N
g* h * η * P * g; In the formula, n is counterattack trip-out rate, N
gThe ground of transmission line of electricity dodges density, and h is the lightning conducter height, and η is probability of sustained arc, and P is that amplitude of lightning current surpasses the probability of strikeing back lightning withstand level, and g is for hitting the bar rate.
As an embodiment preferably, described travelling wave current Wave data can comprise: the positional information that transmission line of electricity is struck by lightning, number of times information etc.
It is identical that above-mentioned a kind of electric power line pole tower is strikeed back the appraisal procedure that other technologies feature and a kind of electric power line pole tower of the present invention of the apparatus for evaluating of anti-thunder performance strike back anti-thunder performance, and it will not go into details herein.
Can find out by above scheme, electric power line pole tower of the present invention is strikeed back appraisal procedure and the device of anti-thunder performance, then the travelling wave current Wave data of accurate recording on the three-phase conducting wire when obtaining transmission line of lightning strike calculates the bar rate of hitting of transmission line of electricity by the statistical study to these data.Because what adopt when carrying out the assessment that electric power line pole tower strikes back anti-thunder performance among the present invention is the actual bar rate of hitting, more accurate with the counterattack trip-out rate result that the bar rate of hitting of reality calculates, the thunderbolt characteristic that more can reflect transmission line of electricity, therefore effectively avoid the security hidden trouble of electric power line pole tower, can instruct better transmission line of electricity operation maintenance personnel to carry out Thunder Protection.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. an electric power line pole tower is strikeed back the appraisal procedure of anti-thunder performance, it is characterized in that, may further comprise the steps:
Travelling wave current Wave data when obtaining transmission line of lightning strike on the three-phase conducting wire;
Described travelling wave current Wave data is analyzed, obtained the number of lightning strokes that shaft tower suffers in total degree that transmission line of electricity is struck by lightning and the transmission line of electricity;
The number of lightning strokes that shaft tower suffers in the total degree that is struck by lightning according to described transmission line of electricity, the transmission line of electricity calculates the bar rate of hitting;
Calculate the counterattack trip-out rate according to the described bar rate of hitting;
According to described counterattack trip-out rate electric power line pole tower being strikeed back anti-thunder performance assesses.
2. electric power line pole tower according to claim 1 is strikeed back the appraisal procedure of anti-thunder performance, it is characterized in that, the number of lightning strokes that shaft tower suffers in the total degree that is struck by lightning according to described transmission line of electricity, the transmission line of electricity calculates the process of hitting the bar rate and comprises: the number of lightning strokes that shaft tower in the described transmission line of electricity is suffered obtains the described bar rate of hitting divided by the total degree that described transmission line of electricity is struck by lightning.
3. electric power line pole tower according to claim 1 is strikeed back the appraisal procedure of anti-thunder performance, it is characterized in that, comprises according to described process of hitting bar rate calculating counterattack trip-out rate:
The ground that obtains transmission line of electricity dodges density, lightning conducter height, probability of sustained arc, amplitude of lightning current above the probability of strikeing back lightning withstand level;
Dodge density, lightning conducter height, probability of sustained arc, amplitude of lightning current above the described counterattack trip-out rate of probability calculation of strikeing back lightning withstand level according to the ground that hits bar rate, transmission line of electricity that obtains.
4. electric power line pole tower according to claim 3 is strikeed back the appraisal procedure of anti-thunder performance, it is characterized in that, adopts following formula to calculate described counterattack trip-out rate: n=N
g* h * η * P * g; In the formula, n is counterattack trip-out rate, N
gThe ground of transmission line of electricity dodges density, and h is the lightning conducter height, and η is probability of sustained arc, and P is that amplitude of lightning current surpasses the probability of strikeing back lightning withstand level, and g is for hitting the bar rate.
5. the described electric power line pole tower of any one is strikeed back the appraisal procedure of anti-thunder performance according to claim 1-4, it is characterized in that, described travelling wave current Wave data comprises: the positional information that transmission line of electricity is struck by lightning, number of times information.
6. an electric power line pole tower is strikeed back the apparatus for evaluating of anti-thunder performance, it is characterized in that, comprising:
Data acquisition module, the travelling wave current Wave data when being used for obtaining transmission line of lightning strike on the three-phase conducting wire;
Data analysis module is used for described travelling wave current Wave data is analyzed, and obtains the number of lightning strokes that shaft tower suffers in total degree that transmission line of electricity is struck by lightning and the transmission line of electricity;
Hit bar rate computing module, be used for the total degree that is struck by lightning according to described transmission line of electricity, the number of lightning strokes that the transmission line of electricity shaft tower suffers calculates the bar rate of hitting;
Counterattack trip-out rate computing module is used for calculating the counterattack trip-out rate according to the described bar rate of hitting;
Evaluation module is used for according to described counterattack trip-out rate electric power line pole tower being strikeed back anti-thunder performance and assesses.
7. electric power line pole tower according to claim 6 is strikeed back the apparatus for evaluating of anti-thunder performance, it is characterized in that, described hitting in the bar rate computing module comprises:
The division arithmetic module, the number of lightning strokes that is used for described transmission line of electricity shaft tower is suffered obtains the described bar rate of hitting divided by the total degree that described transmission line of electricity is struck by lightning.
8. electric power line pole tower according to claim 6 is strikeed back the apparatus for evaluating of anti-thunder performance, it is characterized in that, comprises in the described counterattack trip-out rate computing module:
Parameter acquisition module is dodged density, lightning conducter height, probability of sustained arc, amplitude of lightning current above the probability of strikeing back lightning withstand level for the ground that obtains transmission line of electricity;
The parameter application module is used for dodging density, lightning conducter height, probability of sustained arc, amplitude of lightning current above the described counterattack trip-out rate of probability calculation of strikeing back lightning withstand level according to the ground that hits bar rate, transmission line of electricity that obtains.
9. electric power line pole tower according to claim 8 is strikeed back the apparatus for evaluating of anti-thunder performance, it is characterized in that, described parameter application module adopts following formula to calculate described counterattack trip-out rate: n=N
g* h * η * P * g; In the formula, n is counterattack trip-out rate, N
gThe ground of transmission line of electricity dodges density, and h is the lightning conducter height, and η is probability of sustained arc, and P is that amplitude of lightning current surpasses the probability of strikeing back lightning withstand level, and g is for hitting the bar rate.
10. the described electric power line pole tower of any one is strikeed back the apparatus for evaluating of anti-thunder performance according to claim 6-9, it is characterized in that, described travelling wave current Wave data comprises: the positional information that transmission line of electricity is struck by lightning, number of times information.
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| CN104614577A (en) * | 2014-11-18 | 2015-05-13 | 海南电力技术研究院 | Method for acquiring pole lightning striking rate of transmission line based on actually-measured lighting stroke data |
| CN104897977A (en) * | 2014-03-07 | 2015-09-09 | 武汉三相电力科技有限公司 | Power transmission line lightning stroke frequency direct monitoring method |
| CN105825330A (en) * | 2016-03-14 | 2016-08-03 | 中国矿业大学 | Current lightning protection situation assessment system for power transmission line |
| CN108899765A (en) * | 2018-07-09 | 2018-11-27 | 安徽硕日光电科技有限公司 | A kind of lightning protection Intelligentized regulating and controlling method |
| CN112798853A (en) * | 2020-12-28 | 2021-05-14 | 广东电网有限责任公司电力科学研究院 | Assessment method for lightning invasion wave level of substation electrical equipment for resisting continuous lightning stroke |
| WO2021109634A1 (en) * | 2019-12-03 | 2021-06-10 | 广东电网有限责任公司 | Lightning trip rate testing method taking soil resistivity variation into account |
| CN116579617A (en) * | 2023-07-12 | 2023-08-11 | 国网山东省电力公司邹城市供电公司 | Power grid risk assessment method and system |
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| CN104897977A (en) * | 2014-03-07 | 2015-09-09 | 武汉三相电力科技有限公司 | Power transmission line lightning stroke frequency direct monitoring method |
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| CN105825330A (en) * | 2016-03-14 | 2016-08-03 | 中国矿业大学 | Current lightning protection situation assessment system for power transmission line |
| CN108899765A (en) * | 2018-07-09 | 2018-11-27 | 安徽硕日光电科技有限公司 | A kind of lightning protection Intelligentized regulating and controlling method |
| WO2021109634A1 (en) * | 2019-12-03 | 2021-06-10 | 广东电网有限责任公司 | Lightning trip rate testing method taking soil resistivity variation into account |
| CN112798853A (en) * | 2020-12-28 | 2021-05-14 | 广东电网有限责任公司电力科学研究院 | Assessment method for lightning invasion wave level of substation electrical equipment for resisting continuous lightning stroke |
| CN112798853B (en) * | 2020-12-28 | 2022-05-27 | 广东电网有限责任公司电力科学研究院 | Assessment method for lightning invasion wave level of substation electrical equipment for resisting continuous lightning stroke |
| CN116579617A (en) * | 2023-07-12 | 2023-08-11 | 国网山东省电力公司邹城市供电公司 | Power grid risk assessment method and system |
| CN116579617B (en) * | 2023-07-12 | 2023-11-03 | 国网山东省电力公司邹城市供电公司 | Power grid risk assessment method and system |
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Application publication date: 20130417 |