CN102957115A - Arrester arrangement method for 500-kV electric transmission line - Google Patents
Arrester arrangement method for 500-kV electric transmission line Download PDFInfo
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- CN102957115A CN102957115A CN2012104093133A CN201210409313A CN102957115A CN 102957115 A CN102957115 A CN 102957115A CN 2012104093133 A CN2012104093133 A CN 2012104093133A CN 201210409313 A CN201210409313 A CN 201210409313A CN 102957115 A CN102957115 A CN 102957115A
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Abstract
The invention particularly relates to an arrester arrangement method for a 500-kV electric transmission line, which depends on a reliable theoretical foundation and is efficient, reasonable and economical in actual application. According to the arrester arrangement method provided by the invention, a range of calculation sections is reduced by analyzing a lightning fault distribution diagram; the emphasis of calculation is determined within sections of a third lightning fault level and a fourth lightning fault level; an advanced and reasonable calculation method is adopted, and shielding failure rates of ordinary towers and towers of the electric transmission line crossing valleys in different conditions are distinguished; on the basis of the principles in the former two steps, the towers provided with arresters can be determined through a great amount of experiments, so that the arrester arrangement method is efficient and economical. The arrester arrangement method provided by the invention can serve as a good selection method integrating theory with practice for the arrangement of the arrester.
Description
Technical field
The present invention relates to the lightning arrester method for arranging of ultra-high-tension power transmission line, be specially a kind of 500kV electric transmission line lightning arrester and arrange method.
Background technology
Both at home and abroad the operating experience of high-tension line shows, the shaft tower height less than 50m, earth resistance less than
Transmission line, the possibility of its counterattack is very little, lightning stroke trip is mainly caused by shielding.For the circuit of 500kV, because its insulation level is very high, the counterattack lightning withstand level is also very high, and main threat is shielding.
At present, China's shielding trip-out rate generally adopts the rules method to calculate, mainly based on some empirical equations.These empirical equations derive from low voltage grade, low shaft tower and larger shielding angle circuit, and ground elevation is only distinguished with Plain and mountain region, does not take into full account transmission line landform of living in.Some cross over the circuit of deep valley, and overhead distance is very large owing to wire, and ground reduces greatly in the face of the shielding action of wire, and existing rules method and the unaccountable shielding accident of electric geometrical model often occur.Electric geometrical model method (EGM) is a kind of how much computation models that the physical dimension with the discharge characteristic of thunder and lightning and circuit connects." improved EGM is to calculating and the Analysis on Typical Faults of transmission line risk of shielding failure " in the 42nd volume third phase of June in 2006 " High-Voltage Electrical Appliances " discloses a kind of computational methods of improved electric geometrical model.Utilize that electric geometrical model method (EGM) can calculate the easy section of hitting, risk of shielding failure and the shielding trip-out rate of the shaft tower etc. that be struck by lightning.
After compound inslation AC series gap lightning arrester was used for the transmission line lightning protection, because lightning arrester only can be protected the insulator of this basic shaft tower, there was dispute in the installation quantity of lightning arrester always.The scheme that has is to install lightning arrester additional in the shaft tower both sides that may be struck by lightning, and the scheme that has is to install earth resistance shaft tower large, that soil resistivity is higher additional lightning arrester, and the scheme that has is to advocate to install additional lightning arrester completely.But lack efficient, reasonable, economic lightning arrester method for arranging in a kind of that reliable theoretical foundation arranged and practical application.
Summary of the invention
The present invention lacks efficient, reasonable, economic lightning arrester method for arranging in a kind of that reliable theoretical foundation arranged and practical application in order to solve, and provides a kind of 500kV electric transmission line lightning arrester to arrange method.
The present invention adopts following technical scheme to realize: the 500kV electric transmission line lightning arrester is arranged method, comprise the steps,
(1) determines the easily section of hitting of transmission line and lightning stroke trip reason; Be specially and utilize shielding damage to crops caused by thunder distribution map and lightning strike accident statistical analysis over the years, section of living in three, level Four damage to crops caused by thunder grade is defined as the easily section of hitting, i.e. section to be calculated;
(2) utilize electric geometrical model method (EGM) to calculate the common shaft tower and the risk of shielding failure of striding power transmission line place, mountain valley shaft tower of section to be calculated; Be specially the computational methods factorization that utilizes existing electric geometrical model method (EGM), program is comprised of two parts, first is the calculation procedure of the risk of shielding failure at common shaft tower place, by the input lightning current, lightning conducter is to ground level, wire is to ground level, the lightning conducter spacing, shielding angle and ground elevation data calculate the risk of shielding failure at shaft tower place, second portion is the risk of shielding failure calculation procedure of striding power transmission line place, mountain valley shaft tower, by the input lightning current, high hilltop lightning conducter is to ground level, short hilltop lightning conducter is to ground level, high hilltop wire is to ground level, short hilltop wire is to ground level, the lightning conducter spacing, high hilltop height above sea level, short hilltop height above sea level and wire midpoint ground elevation data calculate the risk of shielding failure of striding power transmission line place, mountain valley shaft tower;
(3) measure each common shaft tower place of collection and stride power transmission line place, mountain valley shaft tower desired data, the described calculation procedure of input step (2), calculate each common shaft tower place and the risk of shielding failure of striding power transmission line place, mountain valley shaft tower, after the list records, filter out risk of shielding failure is defined as installing lightning arrester greater than 0.03 shaft tower shaft tower.
Common shaft tower is with the difference of striding power transmission line place, mountain valley shaft tower, strides power transmission line place, mountain valley its power transmission line of shaft tower across the mountain valley.Traditional risk of shielding failure and shielding trip-out rate computational methods do not consider that the process of thunderbolt wire and the factors such as lightning current size and ground elevation are on the impact of lightning conducter shield effectiveness, the specific features that therefore often can not reflect the thunderbolt wire, electric geometrical model method (EGM)---can utilize at least to be based upon the improved EGM that hits on the conceptual foundation transmission line risk of shielding failure is calculated, reflect that more all sidedly the structure of transmission line and landforms are on the impact of shielding.Risk of shielding failure is defined as filling the shaft tower of lightning arrester greater than 0.03 shaft tower, and this selection has namely guaranteed to avoid as far as possible the impact of damage to crops caused by thunder, has taken into account simultaneously efficient and economy.
Beneficial effect of the present invention is as follows: utilize the damage to crops caused by thunder distribution map determine section to be calculated, utilize electric geometrical model method (EGM) calculation of sector common shaft tower and stride the risk of shielding failure of power transmission line place, mountain valley shaft tower and select risk of shielding failure is defined as filling lightning arrester greater than 0.03 shaft tower shaft tower.The present invention has dwindled the scope of calculation of sector by analyzing the damage to crops caused by thunder distribution map, calculation stress determine three, the section of level Four damage to crops caused by thunder grade, adopted advanced rational computational methods and distinguish the common shaft tower of different condition and stride the risk of shielding failure of power transmission line place, mountain valley shaft tower, under the theory support of first two steps, determined to install the shaft tower of lightning arrester through great many of experiments, taken into account efficient and economy, a kind of system of selection of good theoretical combination practice is provided for the layout of lightning arrester.In the concrete experimentation in North China Power Telecommunication Network refreshing guarantor two wires, the refreshing two wires of protecting of North China Power Telecommunication Network the shielding phenomenon do not occur in 1 year completely according to the method for the invention.
Description of drawings
Fig. 1 is 2003 ~ 2011 years North China's shielding damage to crops caused by thunder distribution maps, and redness and orange areas are three grades and level Four damage to crops caused by thunder zone among the figure.
Embodiment
The 500kV electric transmission line lightning arrester is arranged method, comprises the steps,
(1) determines the easily section of hitting of transmission line and lightning stroke trip reason; Be specially and utilize shielding damage to crops caused by thunder distribution map and lightning strike accident statistical analysis over the years, section of living in three, level Four damage to crops caused by thunder grade is defined as the easily section of hitting, i.e. section to be calculated;
(2) utilize electric geometrical model method (EGM) to calculate the common shaft tower and the risk of shielding failure of striding power transmission line place, mountain valley shaft tower of section to be calculated; Be specially the computational methods factorization that utilizes existing electric geometrical model method (EGM), program is comprised of two parts, first is the calculation procedure of the risk of shielding failure at common shaft tower place, by the input lightning current, lightning conducter is to ground level, wire is to ground level, the lightning conducter spacing, shielding angle and ground elevation data calculate the risk of shielding failure at shaft tower place, second portion is the risk of shielding failure calculation procedure of striding power transmission line place, mountain valley shaft tower, by the input lightning current, high hilltop lightning conducter is to ground level, short hilltop lightning conducter is to ground level, high hilltop wire is to ground level, short hilltop wire is to ground level, the lightning conducter spacing, high hilltop height above sea level, short hilltop height above sea level and wire midpoint ground elevation data calculate the risk of shielding failure of striding power transmission line place, mountain valley shaft tower;
(3) measure each common shaft tower place of collection and stride power transmission line place, mountain valley shaft tower desired data, the described calculation procedure of input step (2), calculate each common shaft tower place and the risk of shielding failure of striding power transmission line place, mountain valley shaft tower, after the list records, filter out risk of shielding failure is defined as installing lightning arrester greater than 0.03 shaft tower shaft tower.
For be not in three, the common shaft tower of the section of level Four damage to crops caused by thunder grade and stride power transmission line place, mountain valley shaft tower, if its height above sea level is higher than 1000m and span greater than 550 meters, also be defined as installing the shaft tower of lightning arrester.
Embodiment 1
Take the refreshing two wires of protecting of North China Power Telecommunication Network as example, easily the shaft tower place risk of shielding failure of the section of hitting is calculated as follows shown in the table,
Easily power transmission line place, the mountain valley shaft tower risk of shielding failure of striding of the section of hitting is calculated as follows shown in the table,
Final definite tower bar of installation lightning arrester that needs is as shown in the table,
| Shaft tower | Turriform | The installation site |
| 177# | ZIVG-39 | Left and right |
| 178# | ZIVG-39 | Left and right |
| 179# | ZIVG-33 | Left and right |
| 180# | ZIVG-42 | Left and right |
| 181# | ZIVG-27 | Left and right |
| 182# | ZIVG-48 | Left and right |
| 183# | JII-27 | Left and right |
| 320# | ZIG-33 | Left and right |
| 321# | ZIIIG-39 | Left and right |
| 322# | ZIIIG-42 | Left and right |
| 323# | ZIIG-39 | Left and right |
| 324# | ZIIIG-27 | Left and right |
| 325# | ZIIIG-30 | Left and right |
| 326# | ZIG-39 | Left and right |
| 327# | ZIG-33 | Left and right |
| 360# | ZIVG-48 | Left and right |
| 361# | JⅠ-27 | Left and right |
| 387# | ZIIG-27 | Left and right |
| 388# | JⅠ-24 | Left and right |
| 389# | ZIG-45 | Left and right |
| 390# | ZIG-42 | Left and right |
| 391# | JⅡ-24 | Left and right |
| 392# | JⅠ-21 | Left and right |
| 188# | ZIVG-30 | Left and right |
| 210# | ZIIIG-27 | Left and right |
| 319# | ZIG-33 | Left and right |
| 357# | ZIVG-45 | Left and right |
| 364# | JⅠ-27 | Left and right |
| 369# | ZIG-27 | Left and right |
| 386# | ZIG-30 | Left and right |
For be not in three, the shaft tower of the section of level Four damage to crops caused by thunder grade and stride power transmission line place, mountain valley shaft tower, but its height above sea level is higher than 1000m and span greater than 550 meters, also is defined as installing the shaft tower of lightning arrester.It is as shown in the table,
| Shaft tower | Turriform | Height above sea level (m) | Landform | Span (m) | Risk of shielding failure |
| 169# | ZIVG-48 | 1336.418 | The high mountain high hill | 796 | 0.0402 |
| 175# | ZIVG-48 | 1553.02 | The high mountain high hill | 785 | 0.0246 |
| 176# | ZIVG-42 | 1479.733 | The high mountain high hill | 872 | 0.0017 |
| 186# | ZIVG-45 | 1981.023 | The high mountain high hill | 847 | 0.0430 |
| 190# | ZIVG-42 | 1688.903 | The high mountain high hill | 792 | 0.0644 |
| 202# | ZIG-27 | 1852.477 | General mountain area | 558 | 0.0216 |
| 211# | ZIVG-42 | 1563.388 | General mountain area | 879 | 0.0307 |
| 214# | ZIIIG-42 | 1603.393 | General mountain area | 670 | 0.0335 |
| 285# | ZIIG-27 | 1478.36 | Mountain | 755 | 0.0016 |
| 286# | ZIVG-27 | 1478.86 | Mountain | 757 | 0.0036 |
| 348# | ZIVG-39 | 1094.52 | The high mountain high hill | 893 | 0.0050 |
| 352# | ZIIIG-27 | 1149.92 | The high mountain high hill | 858 | 0.0212 |
| 383# | ZIVG-45 | 1137.82 | The hills | 869 | 0.0592 |
After selected lightning arrester was installed according to the method described above, the refreshing two wires of protecting of North China Power Telecommunication Network the shielding phenomenon do not occur in 1 year completely.
Claims (2)
1. a 500kV electric transmission line lightning arrester is arranged method, it is characterized in that: comprise the steps,
(1) determines the easily section of hitting of transmission line and lightning stroke trip reason; Be specially and utilize shielding damage to crops caused by thunder distribution map and lightning strike accident statistical analysis over the years, section of living in three, level Four damage to crops caused by thunder grade is defined as the easily section of hitting, i.e. section to be calculated;
(2) utilize electric geometrical model method (EGM) to calculate the common shaft tower and the risk of shielding failure of striding power transmission line place, mountain valley shaft tower of section to be calculated; Be specially the computational methods factorization that utilizes existing electric geometrical model method (EGM), program is comprised of two parts, first is the calculation procedure of the risk of shielding failure at common shaft tower place, by the input lightning current, lightning conducter is to ground level, wire is to ground level, the lightning conducter spacing, shielding angle and ground elevation data calculate the risk of shielding failure at shaft tower place, second portion is the risk of shielding failure calculation procedure of striding power transmission line place, mountain valley shaft tower, by the input lightning current, high hilltop lightning conducter is to ground level, short hilltop lightning conducter is to ground level, high hilltop wire is to ground level, short hilltop wire is to ground level, the lightning conducter spacing, high hilltop height above sea level, short hilltop height above sea level and wire midpoint ground elevation data calculate the risk of shielding failure of striding power transmission line place, mountain valley shaft tower;
(3) measure each common shaft tower place of collection and stride power transmission line place, mountain valley shaft tower desired data, the described calculation procedure of input step (2), calculate each common shaft tower place and the risk of shielding failure of striding power transmission line place, mountain valley shaft tower, after the list records, filter out risk of shielding failure is defined as installing lightning arrester greater than 0.03 shaft tower shaft tower.
2. 500kV electric transmission line lightning arrester according to claim 1 is arranged method, it is characterized in that, for be not in three, the common shaft tower of the section of level Four damage to crops caused by thunder grade and stride power transmission line place, mountain valley shaft tower, if its height above sea level is higher than 1000m and span greater than 550 meters, also be defined as installing the shaft tower of lightning arrester.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105406438A (en) * | 2015-12-10 | 2016-03-16 | 国网四川省电力公司电力科学研究院 | Light line lightning arrester arrangement method |
| CN109521343A (en) * | 2018-12-29 | 2019-03-26 | 广东电网有限责任公司 | A kind of appraisal procedure for drawing Reatta protection scope |
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| CN105406438A (en) * | 2015-12-10 | 2016-03-16 | 国网四川省电力公司电力科学研究院 | Light line lightning arrester arrangement method |
| CN109521343A (en) * | 2018-12-29 | 2019-03-26 | 广东电网有限责任公司 | A kind of appraisal procedure for drawing Reatta protection scope |
| CN109521343B (en) * | 2018-12-29 | 2020-11-10 | 广东电网有限责任公司 | Method for evaluating lightning-induced tower protection range |
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