CN101949807B - External insulation natural dirt accumulation testing method for high-voltage power transmission line - Google Patents
External insulation natural dirt accumulation testing method for high-voltage power transmission line Download PDFInfo
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- 150000003839 salts Chemical class 0.000 claims abstract description 9
- 238000011109 contamination Methods 0.000 claims description 55
- 230000000007 visual effect Effects 0.000 claims description 23
- 239000012212 insulator Substances 0.000 claims description 21
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Abstract
The invention discloses an external insulation natural direct accumulation testing method for a high-voltage power transmission line. The method comprises the following steps of: performing mesh division on a dirt test area on a Google Earth visible geographic information platform to divide the whole area into a plurality of meshes of 1 to 5 kilometers; then importing power transmission line tower coordinates in the dirt test area into the Google Earth visible geographic information platform; and importing the conventional dirt level distribution graph and terrain and physiognomy distribution graphs in the dirt test area into the Google Earth visible geographic information platform, determining a polygonal comprehensive attribute area, determining a natural direct accumulation test point of the high-voltage power transmission line, and calculating full-surface equivalent salt density and full-surface equivalent gray density. The method for selecting the external insulation natural direct accumulation test point of the high-voltage power transmission line has the advantages of low cost, simple and feasible operation and easy acceptance and mastering, and is convenient for popularization.
Description
Technical field
The present invention relates to external insulation nature contamination method of testing, particularly the ultra-high-tension power transmission line external insulation of 110kV and above electric pressure nature contamination method of testing.
Background technology
Antifouling work is normally based on filthy degree test and pollution flashover mechanism.Determine dirty district grade by filthy degree test, instruct work such as external insulation design and running maintenance; By the research of pollution flashover mechanism, formulate new anti-pollution measure, improve antifouling ability.In recent years, along with external insulation design level and operation and maintenance level improve constantly, the extensive employing of composite insulator and persistence antifouling paint (PRTV), the pollution flashover accident of China's transmission line of electricity is effectively contained.But extensive regional pollution flashover accident still happens occasionally, and particularly the circuit pollution flashover of 110kV and following electric pressure is also relatively more serious.The pollution flashover accident number has accounted for second in the power grid accident sum, be only second to the damage to crops caused by thunder accident, but the loss that pollution flashover accident causes is 10 times of the damage to crops caused by thunder accident, and visible pollution flashover research is of crucial importance, needs more in depth to carry out the work.
Chinese scholars is studied from the mechanism and the aspects such as influence factor, filthy degree test thereof of the source of filth and diffusion, pollution flashover respectively; Discover that because of filthy component difference it is certain not enough to use equivalent salt density (ESDD) assessment external insulation pollution degree to exist, artificial filthy pollution flashover voltage is than filthy naturally phenomenon such as on the low side.In other words, because of filthy component difference, the greatest differences that exists between the filthy degree of use ESDD assessment and the actual filthy degree, the actual effect that causes external insulation design and day-to-day operation to be safeguarded is undesirable, even causes a large amount of manpower and materials wastes; Research to pollution flashover mechanism also is subjected to the single influence of artificial filthy composition, fails to study the different pollution flashover features and the mechanism of various compositions in the nature filth, to the research deficiency of pollution flashover mechanism, causes existing antifouling product can not satisfy the demand of actual motion.
In sum, because of the deficiency to filthy composition Study, cause filthy degree assessment and the research of pollution flashover mechanism to have defective, existing anti-pollution measure can not satisfy the demand of actual motion.At present, Chinese scholars is recognized the critical role of filthy composition correlative study in antifouling work, and with equivalent ash close (NSDD) as the dirty quantitative parameter of distinguishing grade of assessment.Therefore, if will fundamentally change present antifouling situation, just need to strengthen the correlative study of the filthy composition of nature, and above research needs all from setting up nature contamination testing site, carries out long-term natural contamination test, it is filthy and effectively test to obtain nature.
At present, the test of natural contamination is usually at transformer station, current conversion station, special-purpose natural contamination station, and the pollution flashover accident shaft tower carries out test of nature contamination and measurement.Usually transformer station and current conversion station are considered the antifouling demand of external insulation when building a station addressing, determine in light filthy district away from pollution source, and as the farmland, residential block etc.Because of transformer station and current conversion station belong to light filthy district, and filthy composition is single, can not reflect effectively that ultra-high-tension power transmission line passes through the complicated filthy degree and the filthy composition in area.Though special-purpose natural contamination station, pollution flashover accident shaft tower can reflect to a certain extent, ultra-high-tension power transmission line passes through the filthy degree and the filthy composition of some areas, but transmission line of electricity is various, the filthy degree and the composition that pass through the area are very complicated, and special-purpose natural contamination station, pollution flashover accident shaft tower quantity are very limited, can not reflect comprehensively that ultra-high-tension power transmission line passes through the filthy situation in area.Therefore, need a kind of new ultra-high-tension power transmission line external insulation nature contamination method of testing to change above present situation.
Summary of the invention
At the deficiency of existing nature contamination method of testing, the present invention is intended to propose a kind of new ultra-high-tension power transmission line external insulation nature contamination method of testing, realizes the test of ultra-high-tension power transmission line external insulation nature contamination efficiently.
The object of the invention is by realizing by the following technical solutions:
A kind of ultra-high-tension power transmission line external insulation nature contamination method of testing comprises the steps:
(1) on the visual geographical information platform of Google Earth, filthy test zone is carried out grid dividing, whole area dividing is become the grid of several 1km～5km;
(2) the electric power line pole tower coordinate with the existing 110kV～500kV in the filthy test zone imports the visual geographical information platform of Google Earth, electric power line pole tower is distributed carry out visualization display;
(3) the existing gradation for surface pollution distribution plan in the filthy test zone is imported the visual geographical information platform of Google Earth, form the gradation for surface pollution attribute of grid, the gradation for surface pollution attribute is divided into the filthy 4 kinds of attributes of the filth of I level, II filth, the filth of III level and IV level; Existing topography profile in the filthy test zone is imported the visual geographical information platform of Google Earth, form the landform attribute of grid, the landform attribute is divided into mountain region, plateau, Plain, hills and basin; Existing landforms distribution plan in the filthy test zone is imported the visual geographical information platform of Google Earth, form the landforms attribute of grid, described landforms attribute is divided into highway district, farmland district, manufacturing district, residential block and nearly pool; The coordinate that pollution flashover accident took place in the electric power line pole tower with the existing 110kV～500kV in the filthy test zone imports the visual geographical information platform of Google Earth, forms the pollution flashover accident attribute of grid, pollution flashover accident is distributed carry out visualization display;
(4) mark has the grid of pollution flashover accident attribute;
(5) on the visual geographical information platform of the Google Earth of step (3) gained, for grid with the two kinds of landforms attributes in nearly pool and highway district, the grid in the upper left corner since two zones, the longitudinal extension that moves towards along the respective attributes zone, every 10km-15km divides the independent landforms attribute area territory of a respective attributes, and landforms attribute that should all grids of zone is set to respective attributes; For the grid of farmland district, manufacturing district, the three kinds of landforms attributes in residential block, use the selection square frame of a 10km-15km, begin to move right earlier from the upper left corner of filthy test zone, move a grid at every turn; After moving to low order end, move down a grid and move from left to right again; For grid with different terrain attribute, use the selection square frame of a 15km-20km, begin to move right earlier from the upper left corner of filthy test zone, move a grid at every turn; After moving to low order end, move down a grid and move from left to right again; For grid with different gradation for surface pollution attributes, use the selection square frame of a 20km-30km, begin to move right earlier from the upper left corner of filthy test zone, move a grid at every turn; After moving to low order end, move down a grid and move from left to right again; The number of grid of a certain attribute reach the 70%-80% that selects box footprints territory grid total quantity and more than, should select the box footprints territory to be divided into the respective attributes zone so, number of grid as each attribute all can not reach the 70%-80% that selects box footprints territory grid total quantity, and the attribute of these all grids of zone is set to not have the attribute zone;
(6) if pollution flashover accident took place, picked at random has three interior basic shaft towers of pollution flashover accident attribute grid as ultra-high-tension power transmission line nature contamination testing site; Then, the polygon synthesized attribute zone of the landforms attribute of drawing according to step (5), landform attribute, gradation for surface pollution attribute, be connected with the diagonal line in synthesized attribute zone and the diagonal line in the no synthesized attribute of connection zone, with the diagonal line intersection point is the central point in synthesized attribute zone, and three basic shaft towers in the grid of picked at random central point place are as ultra-high-tension power transmission line nature contamination testing site; If do not have shaft tower in the grid of central point place, perhaps less than three basic shaft towers are selected with the central point so for center of circle radius is that shaft tower nearest in the circular scope of 5km is supplied the disappearance shaft tower, as ultra-high-tension power transmission line nature contamination testing site; If place, center of circle grid, and all do not have shaft tower in the circumference 10km scope, then need to set up nature contamination testing site and carry out the test of nature contamination;
(7) the artificial filthy and encapsulation of on shaft tower, using the upper and lower surface of sampling cloth difference wipe test insulator, filthy sample after will encapsulating is then delivered to the laboratory and is detected, measure the equivalent salt density of nature contamination testing site shaft tower insulator upper surface and lower surface respectively according to GB/T 4585-2004/IEC 60507:1991, count ESDD respectively
OnAnd ESDD
DownThe equivalent ash of measuring nature contamination testing site shaft tower insulator upper surface and lower surface according to IEC60815-1 respectively is close, counts NSDD respectively
OnAnd NSDD
DownThe complete surperficial equivalent salt density ESDD of nature contamination testing site shaft tower insulator
EntirelyWith the equivalent grey close NSDD in full surface
EntirelyCalculate according to following formula.
ESDD
Entirely=(ESDD
On* S
On+ ESDD
Down* S
Down)/(S
On+ S
Down)
NSDD
Entirely=(NSDD
On* S
On+ NSDD
Down* S
Down)/(S
On+ S
Down)
NSDD
Entirely, ESDD
On, NSDD
On, ESDD
DownPerhaps NSDD
DownThe mg/cm of unit
2S
OnSurface area for the insulator upper surface; S
DownBe the surface area of insulator lower surface, the cm of unit
2
Be further to realize the object of the invention, described step (2) distributes to electric power line pole tower and carries out visualization display and be meant and use black shaft tower icon representation 110kV shaft tower respectively, blue shaft tower icon representation 220kV shaft tower, red shaft tower icon representation 500kV shaft tower.
In the described step (3), overlapping if geomorphic province has, formulate priority according to the weight of regional pollution, the heavy more priority of regional pollution is high more, and the light more priority of regional pollution is low more; Zone priority is set to manufacturing district, highway district, nearly pool, farmland district and residential block from high to low.
Whether described step (5) reaches the 75%-80% that selects box footprints territory grid total quantity by judging the quantity of selecting the grid of certain attribute in the square frame, and then judges the respective attributes of selecting the box footprints territory.
Compare with existing nature contamination method of testing, the present invention has following advantage:
(1) the present invention has broken nature contamination test has been confined to transformer station, current conversion station, special-purpose natural contamination station, pollution flashover accident zone tradition, nature contamination testing site extensively is distributed on all electric power line pole towers, be multiple filthy degree, the research of multiple filthy composition is laid a good foundation, for the antifouling research of power external insulation provides brand-new platform.At present, all there is not the test of ultra-high-tension power transmission line external insulation nature contamination to determine method and its implementation both at home and abroad.
(2) the present invention is first with the relation of ultra-high-tension power transmission line nature contamination situation and meteorological pollution source situation, use the mode of topography and geomorphology to explain, and the transmission line of electricity of giving chapter and verse passes through the method that regional topography and geomorphology is determined nature contamination testing site, greatly simplified natural contamination testing site determining step, make that operation is simple, be easy to accept and grasp.
(3) the present invention has formulated the visual geographical information platform based on Google Earth first, use gridding method, method of geometry is determined the natural contamination method of testing of synthesized attribute regional center, with the visual geographical information platform overall treatment multiattribute data of Google Earth, and substituted on-the-spot artificial investigation, greatly reduced the consumption of manpower, material resources and financial resources, be convenient to promote.
Embodiment
The test job of ultra-high-tension power transmission line external insulation nature contamination need be taken all factors into consideration all multifactorly, can specifically implement according to the following step.
(1) on the visual geographical information platform of Google Earth, filthy test zone is carried out grid dividing, whole area dividing is become the grid of several 1km～5km; (Google Earth is the software of globe virtually of a Google company exploitation GE) to Google Earth, and it is arranged in satellite photo, aerial photography and GIS on the three-dimensional model of One Earth One Family.Google Earth released to the whole world in 2005, and users can freely browse the high definition satellite photo of all parts of the world by a client software that downloads on the own computer.
(2) the electric power line pole tower coordinate of the existing 110kV～500kV in the filthy test zone is imported the visual geographical information platform of Google Earth, use respectively black shaft tower icon (
) expression 110kV shaft tower, blue shaft tower icon (
) expression 220kV shaft tower, red shaft tower icon (
) expression 500kV shaft tower, visualization display is carried out in distribution to electric power line pole tower;
(3) in filthy test zone, the gradation for surface pollution distribution plan that has adopted gridding method to draw power department imports the visual geographical information platform of Google Earth, and the gradation for surface pollution attribute of corresponding grid is set, the gradation for surface pollution attribute is divided into the filthy 4 kinds of attributes of the filth of I level, II filth, the filth of III level and IV level usually.
(4) in filthy test zone,, on the visual geographical information platform of Google Earth, the landform attribute of corresponding grid is set according to the characteristics of various landform attributes.Common landform attribute is made as the mountain region, and (height above sea level is more than 500 meters, relative relief is more than 200 meters), (height above sea level is more than 1000 meters on the plateau, periphery is the boundary with tangible abrupt slope), Plain (0～500 meter of height above sea level, landform is smooth), the hills is (below the height above sea level 500m, relative relief 200m is following) and the basin (all around by the mountain ridge, plateau around, the centre is the peviform landform on Plain or hills) 5 kinds of attributes.
(5) in filthy test zone,, on the visual geographical information platform of Google Earth, the landforms attribute of corresponding grid is set according to the characteristics of various landforms attributes.Usually the landforms attribute is made as highway district (average daily vehicle flowrate surpasses both sides of highway 3～5km zone of 5000 times), farmland district (zone that green vegetation covers), (zone that obvious pollution source are arranged is assembled in industry in the manufacturing district, particularly the industrial gaseous waste pollution source comprise the fuel-burning power plant, steel plant, cokery, non-ferrous metals smelting works, petrochemical plant, nitrogenous fertilizer and phosphate fertilizer plant, sulfuric acid plant, chlor-alkali plant, the chemical fibre factory, insecticide factory, the synthetic rubber plant, the paper mill, glass factory, cement mill etc.), residential block (building constructions is assembled the zone of no obvious pollution source), nearly pool (width surpasses 2.5～5km zone, both sides, river of 100m).If the landforms attribute of grid is difficult to determine, formulate priority according to the weight that pollutes so, it is high more to pollute heavy more priority, and it is low more to pollute light more priority.Usually landforms attribute priority is set to from high to low manufacturing district, highway district, nearly pool, farmland district and residential block.
(6) with in the filthy test zone, in the electric power line pole tower of existing 110kV～500kV, the coordinate of pollution flashover accident shaft tower imports the visual geographical information platform of Google Earth, the pollution flashover accident attribute of corresponding grid is set, and the red pentagram pattern of stack carries out visualization display to it on corresponding grid.
(7) on the visual geographical information platform of Google Earth, filthy test zone is divided into different synthesized attribute zones according to landforms attribute, landform attribute, the gradation for surface pollution attribute of grid.Grid with pollution flashover accident attribute is as single grid, not as the judgment basis of dividing the synthesized attribute zone; The concrete division methods in synthesized attribute zone is shown in step 8～11.
(8) at first divide landforms attribute zone.For the grid with the two kinds of landforms attributes in nearly pool and highway district, it is set to yellow and blueness respectively, can demonstrate the nearly aqua region and the highway zone of strip respectively.The grid in the upper left corner, above-mentioned two zones begins, and along the longitudinal extension that moves towards in respective attributes zone, every 10km-15km divides the independent landforms attribute area territory of a respective attributes, and landforms attribute that should all grids of zone is set to respective attributes.For the grid of farmland district, manufacturing district, the three kinds of landforms attributes in residential block, use the selection square frame of a 10km-15km, begin to move right earlier from the upper left corner of filthy test zone, move a grid at every turn; After moving to low order end, move down a grid and move from left to right again.If select in the three kinds of landforms attributes in farmland district, manufacturing district, residential block in box footprints territory, the number of grid of a certain landforms attribute reach the 70%-80% that selects box footprints territory grid total quantity and more than, to select the box footprints territory to be divided into the independent landforms attribute area territory of respective attributes so, and landforms attribute that should all grids of zone is set to respective attributes.If in farmland district, manufacturing district, the three kinds of landforms attributes in residential block, the number of grid of each landforms attribute all can not reach the 70%-80% that selects box footprints territory grid total quantity, should select the box footprints territory to be divided into independent no landforms attribute zone so, and landforms attribute that should all grids of zone is set to not have the landforms attribute.
(9) secondly divide landform attribute zone.For grid with different terrain attribute, use the selection square frame of a 15km-20km, begin to move right earlier from the upper left corner of filthy test zone, move a grid at every turn; After moving to low order end, move down a grid and move from left to right again.If select in five kinds of landform attributes in box footprints territory, the number of grid of a certain landform attribute reach select box footprints territory grid total quantity 70%～80% and more than, to select the box footprints territory to be divided into the independent landform attribute area territory of respective attributes so, and landform attribute that should all grids of zone is set to respective attributes.If in five kinds of landform attributes, the number of grid of each landform attribute all can not reach the 70%-80% that selects box footprints territory grid total quantity, should select the box footprints territory to be divided into independent no landform attribute zone so, and landform attribute that should all grids of zone is set to not have the landform attribute.
(10) divide gradation for surface pollution attribute zone then.For grid with different gradation for surface pollution attributes, use the selection square frame of a 20km-30km, begin to move right earlier from the upper left corner of filthy test zone, move a grid at every turn; After moving to low order end, move down a grid and move from left to right again.If select in four kinds of gradation for surface pollution attributes in box footprints territory, the number of grid of a certain gradation for surface pollution attribute reach the 70%-80% that selects box footprints territory grid total quantity and more than, to select the box footprints territory to be divided into the independent gradation for surface pollution attribute zone of respective attributes so, and gradation for surface pollution attribute that should all grids of zone is set to respective attributes.If in four kinds of gradation for surface pollution attributes, the number of grid of each gradation for surface pollution attribute all can not reach the 70%-80% that selects box footprints territory grid total quantity, should select the box footprints territory to be divided into independent no filthy attribute zone so, and gradation for surface pollution attribute that should all grids of zone is set to not have filthy attribute.
(11) divide the synthesized attribute zone at last.6 kinds of attributes of landforms (nearly pool, highway district, farmland district, manufacturing district, residential block, no landforms attribute), 5 kinds of attribute zones of 6 kinds of attribute zones of landform (mountain region, plateau, Plain, hills, basin, no landform attribute), gradation for surface pollution (filth of I level, the filth of II level, the filth of III level, the filth of IV level, do not have filthy attribute) may be combined into 6 * 6 * 5=180 kind synthesized attribute grid, for example synthesized attribute is the grid of no landforms attribute hills III level filth, and the manufacturing district does not have the grid of landform attribute II level filth.In the practical engineering application, have only 20 kinds of synthesized attribute grids of less than usually.For grid with different synthesized attributes, use the selection square frame of a 10km-15km, begin to move right earlier from the upper left corner of filthy test zone, move a grid at every turn; After moving to low order end, move down a grid and move from left to right again.If select in the synthesized attribute in box footprints territory, the number of grid of a certain synthesized attribute reach the 70%-80% that selects box footprints territory grid total quantity and more than, will select the box footprints territory to be divided into the independent synthesized attribute zone of respective attributes so.If in the synthesized attribute, the number of grid of each synthesized attribute all can not reach the 70%-80% that selects box footprints territory grid total quantity, should select the box footprints territory to be divided into independent no synthesized attribute zone so.
(12) high pressure overhead power line nature contamination testing site determines.At first, picked at random has three interior basic shaft towers of pollution flashover accident attribute grid as ultra-high-tension power transmission line nature contamination testing site, need to prove, pollution flashover accident took place, illustrate wherein shaft tower must be arranged, and the distance between each shaft tower is no more than 500 meters, and 3 shaft towers must be arranged in the grid of 2km; Then, connect the diagonal line in synthesized attribute zone and no synthesized attribute zone, determine the central point in synthesized attribute zone, three basic shaft towers in the grid of picked at random central point place are as ultra-high-tension power transmission line nature contamination testing site.If do not have shaft tower in the grid of central point place, perhaps less than three basic shaft towers are selected with the central point so for center of circle radius is that shaft tower nearest in the circular scope of 5km is supplied the disappearance shaft tower, as ultra-high-tension power transmission line nature contamination testing site; If place, center of circle grid, and all do not have shaft tower in the circumference 10km scope, then need to set up nature contamination testing site and carry out the test of nature contamination.
(13) natural contamination sample obtaining and measuring.The acquisition method of sample and the measuring method of test figure are artificial sampling the cloth filthy and encapsulation on the upper and lower surface of wipe test insulator respectively of using on shaft tower, filthy sample after will encapsulating is then delivered to the laboratory and is detected, measure the equivalent salt density of nature contamination testing site shaft tower insulator upper surface and lower surface respectively according to GB/T4585-2004/IEC 60507:1991, count ESDD respectively
OnAnd ESDD
DownEquivalent salt density is exactly the filthy equivalent density of solubility of insulator surface, the mg/cm of unit
2It is close to measure the equivalent ash of nature contamination testing site shaft tower insulator upper surface and lower surface respectively according to IEC60815-1, counts NSDD respectively
OnAnd NSDD
DownEquivalent ash is close to be exactly the filthy equivalent density of insolubility of insulator surface, and unit is mg/cm
2The complete surperficial equivalent salt density ESDD of nature contamination testing site shaft tower insulator
EntirelyWith the equivalent grey close NSDD in full surface
EntirelyCalculate according to following formula.
ESDD
Entirely=(ESDD
On* S
On+ ESDD
Down* S
Down)/(S
On+ S
Down)
NSDD
Entirely=(NSDD
On* S
On+ NSDD
Down* S
Down)/(S
On+ S
Down)
S
OnSurface area for the insulator upper surface; S
DownBe the surface area of insulator lower surface, the cm of unit
2
Claims (4)
1. a ultra-high-tension power transmission line external insulation nature contamination method of testing is characterized in that comprising the steps:
(1) on the visual geographical information platform of Google Earth, filthy test zone is carried out grid dividing, whole area dividing is become the grid of several 1km～5km;
(2) the electric power line pole tower coordinate with the existing 110kV～500kV in the filthy test zone imports the visual geographical information platform of Google Earth, electric power line pole tower is distributed carry out visualization display;
(3) the existing gradation for surface pollution distribution plan in the filthy test zone is imported the visual geographical information platform of Google Earth, form the gradation for surface pollution attribute of grid, the gradation for surface pollution attribute is divided into the filthy 4 kinds of attributes of the filth of I level, II filth, the filth of III level and IV level; Existing topography profile in the filthy test zone is imported the visual geographical information platform of Google Earth, form the landform attribute of grid, the landform attribute is divided into mountain region, plateau, Plain, hills and basin; Existing landforms distribution plan in the filthy test zone is imported the visual geographical information platform of Google Earth, form the landforms attribute of grid, described landforms attribute is divided into highway district, farmland district, manufacturing district, residential block and nearly pool; The coordinate that pollution flashover accident took place in the electric power line pole tower with the existing 110kV～500kV in the filthy test zone imports the visual geographical information platform of Google Earth, forms the pollution flashover accident attribute of grid, pollution flashover accident is distributed carry out visualization display;
(4) mark has the grid of pollution flashover accident attribute;
(5) on the visual geographical information platform of the Google Earth of step (3) gained, for grid with the two kinds of landforms attributes in nearly pool and highway district, the grid in the upper left corner since two zones, the longitudinal extension that moves towards along the respective attributes zone, every 10km-15km divides the independent landforms attribute area territory of a respective attributes, and landforms attribute that should all grids of zone is set to respective attributes; For the grid of farmland district, manufacturing district, the three kinds of landforms attributes in residential block, use the selection square frame of a 10km-15km, begin to move right earlier from the upper left corner of filthy test zone, move a grid at every turn; After moving to low order end, move down a grid and move from left to right again; For grid with different terrain attribute, use the selection square frame of a 15km-20km, begin to move right earlier from the upper left corner of filthy test zone, move a grid at every turn; After moving to low order end, move down a grid and move from left to right again; For grid with different gradation for surface pollution attributes, use the selection square frame of a 20km-30km, begin to move right earlier from the upper left corner of filthy test zone, move a grid at every turn; After moving to low order end, move down a grid and move from left to right again; The number of grid of a certain attribute reach the 70%-80% that selects box footprints territory grid total quantity and more than, should select the box footprints territory to be divided into the respective attributes zone so, number of grid as each attribute all can not reach the 70%-80% that selects box footprints territory grid total quantity, and the attribute of these all grids of zone is set to not have the attribute zone;
(6) if pollution flashover accident took place, picked at random has three interior basic shaft towers of pollution flashover accident attribute grid as ultra-high-tension power transmission line nature contamination testing site; Then, the polygon synthesized attribute zone of the landforms attribute of drawing according to step (5), landform attribute, gradation for surface pollution attribute, be connected with the diagonal line in synthesized attribute zone and the diagonal line in the no synthesized attribute of connection zone, with the diagonal line intersection point is the central point in synthesized attribute zone, and three basic shaft towers in the grid of picked at random central point place are as ultra-high-tension power transmission line nature contamination testing site; If do not have shaft tower in the grid of central point place, perhaps less than three basic shaft towers are selected with the central point so for center of circle radius is that shaft tower nearest in the circular scope of 5km is supplied the disappearance shaft tower, as ultra-high-tension power transmission line nature contamination testing site; If place, center of circle grid, and all do not have shaft tower in the circumference 10km scope, then need to set up nature contamination testing site and carry out the test of nature contamination;
(7) the artificial filthy and encapsulation of on shaft tower, using the upper and lower surface of sampling cloth difference wipe test insulator, filthy sample after will encapsulating is then delivered to the laboratory and is detected, measure the equivalent salt density of nature contamination testing site shaft tower insulator upper surface and lower surface respectively according to GB/T4585-2004/IEC 60507:1991, count ESDD respectively
OnAnd ESDD
DownThe equivalent ash of measuring nature contamination testing site shaft tower insulator upper surface and lower surface according to IEC60815-1 respectively is close, counts NSDD respectively
OnAnd NSDD
DownThe complete surperficial equivalent salt density ESDD of nature contamination testing site shaft tower insulator
EntirelyWith the equivalent grey close NSDD in full surface
EntirelyCalculate according to following formula:
ESDD
Entirely=(ESDD
On* S
On+ ESDD
Down* S
Down)/(S
On+ S
Down)
NSDD
Entirely=(NSDD
On* S
On+ NSDD
Down* S
Down)/(S
On+ S
Down)
NSDD
Entirely, ESDD
On, NSDD
On, ESDD
DownPerhaps NSDD
DownThe mg/cm of unit
2S
OnSurface area for the insulator upper surface; S
DownBe the surface area of insulator lower surface, the cm of unit
2
2. ultra-high-tension power transmission line external insulation nature contamination method of testing according to claim 1, it is characterized in that: described step (2) distributes to electric power line pole tower and carries out visualization display and be meant and use black shaft tower icon representation 110kV shaft tower respectively, blue shaft tower icon representation 220kV shaft tower, red shaft tower icon representation 500kV shaft tower.
3. ultra-high-tension power transmission line external insulation nature contamination method of testing according to claim 1, it is characterized in that: overlapping in the described step (3) if geomorphic province has, formulate priority according to the weight of regional pollution, the heavy more priority of regional pollution is high more, and the light more priority of regional pollution is low more; Zone priority is set to manufacturing district, highway district, nearly pool, farmland district and residential block from high to low.
4. ultra-high-tension power transmission line external insulation nature contamination method of testing according to claim 1, it is characterized in that: described step (5) is by judging the quantity of selecting the grid of certain attribute in the square frame, whether reach the 75%-80% that selects box footprints territory grid total quantity, and then judge the respective attributes of selecting the box footprints territory.
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| CN102288515A (en) * | 2011-07-29 | 2011-12-21 | 武汉大学 | Insulator dirt on-site sampling and contamination degree measuring method |
| CN102520119A (en) * | 2011-11-10 | 2012-06-27 | 广东电网公司东莞供电局 | Method for measuring filthy degree on surface of electric outer insulation sheath |
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| CN102809568A (en) * | 2012-08-28 | 2012-12-05 | 广东电网公司佛山供电局 | Method and system for monitoring contamination distribution of insulator |
| CN103411862B (en) * | 2013-07-15 | 2016-08-31 | 国家电网公司 | Insulator Natural contamination examination field |
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| CN103791886B (en) * | 2014-01-15 | 2016-02-10 | 中国能源建设集团江苏省电力设计院有限公司 | Plains region Google Earth assists the flat section survey method of short distance transmission line of electricity |
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| CN108254660A (en) * | 2018-01-15 | 2018-07-06 | 淮阴师范学院 | A kind of isolator detecting equipment |
| CN108333481A (en) * | 2018-01-15 | 2018-07-27 | 淮阴师范学院 | A kind of detection method of insulator |
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