CN104217010B - A kind of wire trip-out rate based on segmentation landform calculates and appraisal procedure - Google Patents
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Abstract
Wire trip-out rate based on segmentation landform calculates and an appraisal procedure, comprises the steps: 1) terrain data mining analysis; 2) the horizontal lightning drawing range geometric ratio of shaft tower divides; 3) segmentation of ground elevation value calculates; 4) shaft tower tripping rate with lightning strike is by calculating mutually; 5) damage to crops caused by thunder risk class assessment; 6) resolution special project is formulated.Step 1) sets up complete geographic information database, step 2) ~ 3) realize the calculating of ground elevation accurate segmentation, step 4) ~ 5) complete for wire trip-out rate calculate and risk class assessment, step 6) generation circuit differentiated lightning protection assessment and Management strategy Lightning Transformation.Beneficial effect of the present invention: the concept revising traditional ground elevation unique value in transmission line of electricity lightning protection calculation, promote the precision of ground elevation value influence factor, and in units of wire, calculate shaft tower tripping rate with lightning strike, obtain shaft tower tripping rate with lightning strike more accurately, realize the accurate evaluation of damage to crops caused by thunder risk class, and then improve the economy of whole modification scheme.
Description
Technical field
The invention belongs to transmission line of electricity lightning protection assessment and protection field, be specifically related to a kind of wire trip-out rate based on segmentation landform and calculate and appraisal procedure.
Background technology
Along with " transferring electricity from the west to the east, north and south confession mutually, on national network " implementation, electric power resource achieves distributing rationally in China, and energy utilization rate significantly promotes, remarkable in economical benefits improves.But constantly complexity, electrical network scale constantly expand therefore also to make electric network composition, winding, constantly rise along mountain circuit accounting, complicated topography and geomorphology situation has had a strong impact on the actual lightning protection properties of circuit, line tripping fault accounting caused by thunderbolt can be in any more, and how the accurate quantification impact of Accuracy Analysis orographic factor on trip-out rate becomes current main bugbear.
In traditional circuit tripping rate with lightning strike computing method, landform is divided into three kinds: Plain, hills, mountain area, and calculate value and be respectively 0 °, 15 °, 30 °, integral basis shaft tower three-phase conducting wire trip-out rate calculates and is same ground elevation value.Analyze from value precision, actual landform landforms all may exist from 0 ° to 90 °, and especially along with the increase of steepness, larger on the impact of shaft tower trip-out rate, only replace all situations with general 3 boundary values, accuracy is extremely low.When trip-out rate calculates, each phase conductor adopts same ground elevation value to calculate, and because the definition of ground elevation is unique, the model reaction of same ground elevation at shaft tower place is: be not mountain valley, be exactly mountain top, and the result calculated cannot react the actual lightning protection level of circuit.Therefore, for making topography and geomorphology influence factor comprehensively and accurately in tripping rate with lightning strike result of calculation, being necessary that proposing a kind of wire trip-out rate based on segmentation landform calculates and appraisal procedure.
Summary of the invention
The technical problem to be solved in the present invention is, for prior art above shortcomings, utilize existing high precision landform relief data, make up current position shape parameter matching degree not enough, correct the method for carrying out the calculating of integral basis shaft tower trip-out rate with same ground elevation, there is provided a kind of wire trip-out rate based on segmentation landform to calculate and appraisal procedure, significantly improve result of calculation accuracy and assessment result reliability.
The present invention for solving the problems of the technologies described above adopted technical scheme is:
Wire trip-out rate based on segmentation landform calculates and an appraisal procedure, comprises the steps:
1) terrain data mining analysis: based on high precision landform relief data, by obtaining the internal attribute information such as coordinate (longitude and latitude), difference of elevation, height above sea level, the gradient to its degree of depth mining analysis, sets up geographic information database;
2) the horizontal lightning drawing range geometric ratio of shaft tower divides: with transmission line of electricity trend for longitudinal datum line, based on shaft tower inherent parameters (shaft tower height and lightning conducter in distance), (shaft tower left and right sides ground is research object to calculate the horizontal lightning drawing range obtaining the shaft tower left and right sides, drawing thunder width is cross-sectional study scope), and horizontal lightning drawing range equal proportion be divided into 8 sections, obtain 8 Along ents and 1 central point, by horizontal, fore-and-aft distance respectively accurate Calculation obtain 8 Along ent coordinates;
3) segmentation of ground elevation value calculate: with step 2) in 8 Along ent coordinates be benchmark, the internal attribute information of 8 waypoints is transferred by database, obtain longitudinal difference of elevation and the transverse horizontal distance of 8 Along ents and central point, calculate the ground elevation value of 8 Along ent relative centre points respectively, the arithmetic mean getting left and right 4 Along ents respectively, as left and right ground elevation Equivalent Calculation value, realizes topography and geomorphology height reduction in circuit lightning drawing range;
4) shaft tower tripping rate with lightning strike is by calculating mutually: in units of the three-phase conducting wires such as left lead, central conductor, right side wire, choose according to step 3) the calculating that corresponding ground inclination value carries out each phase conductor trip-out rate, then three-phase conducting wire trip-out rate is added and namely obtains shaft tower tripping rate with lightning strike;
5) damage to crops caused by thunder risk class assessment: with state's net tripping rate with lightning strike standard of electric pressure residing for transmission line of electricity for benchmark, dodge density value practically in conjunction with shaft tower and calculate the actual trip-out rate index of acquisition shaft tower, whether qualifiedly weigh each base shaft tower Lightning performance, realize the accurate screening of excessive risk shaft tower;
6) resolution special project is formulated: screen the excessive risk shaft tower that obtains as management goal using step 5), with step 4) each phase conductor trip-out rate result of calculation for foundation, with various dimensions information such as risk class, transformation funds and transformation targets for constraint condition, formulate the optimum differentiated lightning protection assessment specific to wire and Management strategy.
By such scheme, in described step 4) when shaft tower is single time shaft tower, if the shaft tower phase sequence that (small size side is toward large size side) reads from left to right is: CBA, then C phase conductor (left lead) trip-out rate calculates and gets left ground elevation value, B phase conductor (central conductor) trip-out rate calculates the arithmetic mean getting left ground elevation value, right ground elevation, and A phase conductor (right side wire) trip-out rate calculates and gets right ground elevation value.
By such scheme, in described step 5), state's net tripping rate with lightning strike standard of electric pressure residing for transmission line of electricity comprises study plot sudden strain of a muscle density value N
markand the trip-out rate index M under this condition
mark, shaft tower dodges density value N practically
realobtained by lightning location system, the actual trip-out rate index M of shaft tower
realmeet: M
real=N
real/ N
mark* M
mark.
Principle of work of the present invention: the Lightning Transformation that becomes more meticulous realizing transmission line of electricity with the technology path of " terrain data mining analysis → shaft tower horizontal lightning drawing range geometric ratio division → ground elevation value segmentation calculating → shaft tower tripping rate with lightning strike is by calculating → damage to crops caused by thunder risk class assessment → resolution special project formulation mutually ", be specially: based on high precision landform relief data, excavate internal information by the degree of depth and obtain the information such as coordinate, difference of elevation, height above sea level, the gradient; Simultaneously with transmission line of electricity trend for datum line, shaft tower left and right sides ground is research object, point 8 accurate Calculation side of wire ground elevations, realizes topography and geomorphology height reduction in circuit lightning drawing range; Getting 4, left and right sides ground elevation mean value is side of wire ground elevation actual value, incorporates during shaft tower tripping rate with lightning strike calculates, and then realizes significantly promoting and the accurate evaluation of damage to crops caused by thunder risk class of computational solution precision.
Beneficial effect of the present invention is:
1, basic data aspect, many deciles are utilized to divide the segmentation value realizing topography and geomorphology, revise the concept of traditional ground elevation unique value in transmission line of electricity lightning protection calculation, horizontal for shaft tower lightning drawing range geometric ratio is divided 8 sections (left and right each 4 sections) and calculates left and right ground elevation value respectively, and choose calculated value in conjunction with phase conductor actual distribution situation distinctiveness, and then greatly promote the precision of ground elevation value influence factor in lightning protection calculation;
2, in simulation calculation, getting 4, shaft tower left and right sides ground elevation mean value is side of wire ground elevation actual value, significantly promote each phase conductor trip-out rate computational solution precision, during the shaft tower tripping rate with lightning strike phase-splitting of bringing in units of wire calculates, obtain Lifting Method in Pole Tower Integral Hoisting tripping rate with lightning strike more accurately, realize the accurate evaluation of damage to crops caused by thunder risk class, for the later stage provides strong guidance for the differentiated lightning protection transformation of wire;
3, in modification scheme, based on phase conductor result of calculation, in conjunction with the transformation amount of money, transformation target, modification measures is configured to wire aspect, for track remodelling provides reliable guide, realizes dropping into, administering doulbe-sides' victory effect, improve the economy of whole modification scheme.
Accompanying drawing explanation
Fig. 1 is principle framework schematic diagram of the present invention;
Fig. 2 is implementing procedure block schematic illustration of the present invention.
Embodiment
In order to understand the present invention better, illustrate content of the present invention further below in conjunction with embodiment, but content of the present invention is not only confined to the following examples.Those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values are equally within claims limited range listed by the application.
As shown in Figure 1, the wire trip-out rate based on segmentation landform of the present invention calculates and appraisal procedure, and the concrete step implemented is as follows:
1) terrain data mining analysis (bases of whole computing method): choose based on high precision landform relief data as far as possible, by obtaining the internal attribute information such as coordinate (longitude and latitude), difference of elevation, height above sea level, the gradient to its degree of depth mining analysis, set up geographic information database;
2) the horizontal lightning drawing range geometric ratio of shaft tower divides: with transmission line of electricity trend for longitudinal datum line, based on shaft tower inherent parameters (shaft tower height and lightning conducter in distance), (shaft tower left and right sides ground is research object to calculate the horizontal lightning drawing range obtaining the shaft tower left and right sides, drawing thunder width is cross-sectional study scope), and horizontal lightning drawing range equal proportion be divided into 8 sections, obtain 8 Along ents and 1 central point, by horizontal, fore-and-aft distance respectively accurate Calculation obtain 8 Along ent coordinates;
3) segmentation of ground elevation value calculate: with step 2) in 8 Along ent coordinates be benchmark, the internal attribute information of 8 waypoints is transferred by database, obtain longitudinal difference of elevation and the transverse horizontal distance of 8 Along ents and central point, calculate the ground elevation value of 8 Along ent relative centre points respectively, the arithmetic mean getting left and right 4 Along ents respectively, as left and right ground elevation Equivalent Calculation value, realizes topography and geomorphology height reduction in circuit lightning drawing range;
4) shaft tower tripping rate with lightning strike is by calculating mutually: in units of the three-phase conducting wires such as left lead, central conductor, right side wire, calculating (the orientation, loop belonging to each phase conductor of the strict confirmation of need that corresponding ground inclination value carries out each phase conductor trip-out rate is chosen according to step 3), confirming azimuth information and carrying out simulation calculation again after selecting correct side of wire ground elevation value, the three-phase conducting wire trip-out rate result obtained will store respectively), then three-phase conducting wire trip-out rate is added and namely obtains shaft tower tripping rate with lightning strike;
5) damage to crops caused by thunder risk class assessment: (comprise study plot with state's net tripping rate with lightning strike standard of electric pressure residing for transmission line of electricity and dodge density value N
markand the trip-out rate index M under this condition
mark) be benchmark, dodge density value N practically in conjunction with shaft tower
real(N
realobtained by lightning location system) calculate the actual trip-out rate index M of acquisition shaft tower
real, whether qualifiedly weigh each base shaft tower Lightning performance, realize the accurate screening of excessive risk shaft tower;
6) resolution special project is formulated: screen the excessive risk shaft tower that obtains as management goal using step 5), with step 4) each phase conductor trip-out rate result of calculation for foundation, with various dimensions information such as risk class, transformation funds and transformation targets for constraint condition, formulate the optimum differentiated lightning protection assessment specific to wire and Management strategy.
Above-mentioned steps 1) set up complete geographic information database, step 2) ~ 3) realize the calculating of ground elevation accurate segmentation, step 4) ~ 5) complete for wire trip-out rate calculate and risk class assessment, the assessment of step 6) generation circuit differentiated lightning protection and Management strategy Lightning Transformation, make this technology be applied to actual production.
As shown in Figure 2, above-mentioned steps 6) to formulate and be mainly divided into four levels specific to the optimum differentiated lightning protection assessment of wire and Management strategy: basic data analysis layer, ground elevation computation layer, tripping rate with lightning strike calculate and evaluation layer, modification scheme formulation layer.Each level is gone forward one by one successively, and the deciphering that basic data analysis layer realizes geographic information data is excavated, and is converted into and calculates available quantitative data; Ground elevation computation layer utilizes the rear geodata of deciphering, with surface irregularity tendency in ground elevation form reduction shaft tower lightning drawing range, and is separately considered by left and right ground elevation, realizes topography and geomorphology and consider the differentiation that trip-out rate affects; Tripping rate with lightning strike calculates and evaluation layer is core layer, and the topography and geomorphology result of otherness incorporates in the trip-out rate calculating for wire by it, and carries out the determination of dangerous shaft tower in conjunction with shaft tower actual trip-out rate index; Modification scheme formulation layer is end layer, and it is by generating the modification scheme of economy the best in conjunction with many factors, to provide the accurate guidance of Lightning Transformation.
Embodiment:
During 2009 ~ 2013 years, there are 3 lightning stroke trip faults in certain 500kV mono-time shaft tower, becomes the high risk tower of whole piece circuit altogether.This shaft tower height h=82 rice, apart from x=9.6 rice in lightning conducter, the horizontal lightning drawing range of shaft tower: S=4h+4x=4*82+4*9.6=355.6 rice, shaft tower coordinate is (111.20539, 30.84018), after decile 8 sections, each Along ent coordinate is respectively: left 4 (111.20582, 30.841079), left 3 (111.20571, 30.840854), left 2 (111.20561, 30.840629), left 1 (111.20549, 30.84040), right 1 (111.20495, 30.83928), right 2 (111.20506, 30.83951), right 3 (111.20517, 30.83973), right 4 (111.20528, 30.83995).
Its internal information is also excavated in locating points position on high precision topography and geomorphology map, obtain longitudinal difference of elevation of each Along ent relative centre point 0, transverse horizontal distance: left 4 → 0 (673.18, 44.45), left 3 → 0 (672.44, 44.45), left 2 → 0 (669.03, 44.45), left 1 → 0 (663.35, 44.45), 0 ← right 1 (619.77, 44.45), 0 ← right 2 (628.21, 44.45), 0 ← right 3 (637.71, 44.45), 0 ← right 4 (646.68, 44.45), and then calculate the ground elevation value of each Along ent relative centre point: θ
left 4(9.19), θ
left 3(11.67), θ
left 2(13.87), θ
left 1(15.86), θ
right 1(-18.33), θ
right 2(-18.67), θ
right 3(-18.33), θ
right 4(-18.33), obtain left ground elevation value θ after getting the ground elevation value arithmetic mean of 4 the Along ent relative centre points 0 in left and right respectively
left(12.64), right ground elevation value θ
right(-18.41).
The phase sequence that shaft tower reads from small size side toward large size side is: CBA, because it is single time shaft tower, therefore C phase conductor trip-out rate calculates and gets left ground elevation value, B phase conductor trip-out rate calculates and gets left ground elevation value, the arithmetic mean of right ground elevation, A phase conductor trip-out rate calculates and gets right ground elevation value, each phase conductor trip-out rate and shaft tower tripping rate with lightning strike result of calculation are respectively C phase conductor trip-out rate: 0.2533 time/hundred kilometers *, B phase conductor trip-out rate: 0.0966 time/hundred kilometers *, A phase conductor trip-out rate: 0.2943 time/hundred kilometers *, CBA three-phase conducting wire trip-out rate is added and is shaft tower tripping rate with lightning strike: 0.6442 time/hundred kilometers *.
Obtain this shaft tower by lightning location system statistics and dodge density value N practically
real: 4.078 times/square kilometre of *, 500kV line standard CG lightning density value N
markbe trip-out rate index M under 2.78 times/square kilometre of * conditions
markbe 0.14 time/hundred kilometers *, the actual trip-out rate index M of this shaft tower after geometric ratio converts
realfor: M
real=N
real/ N
mark* M
mark=0.205 time/hundred kilometers *, are undertaken contrasting, assessing by itself and result of calculation, and this shaft tower damage to crops caused by thunder risk class is D, are potential excessive risk shaft tower, need emphasis to transform.
The shaft tower suggestion installation leakage conductor being D for damage to crops caused by thunder risk class is Lightning Transformation measure, and the assessment of the selection and correctional effect of installing phase will with wire trip-out rate result of calculation for foundation.For this base shaft tower, the highest phase A phase of trip-out rate result of calculation preferentially installed by lightning arrester, after installing, shaft tower tripping rate with lightning strike is B phase and C phase trip-out rate additive value 0.3499 time/hundred kilometers *, damage to crops caused by thunder risk class is C level, do not reach transformation target, carry out the installation of C phase lightning arrester again, now shaft tower tripping rate with lightning strike is 0.0966 time/hundred kilometers *, damage to crops caused by thunder risk class is A, reach transformation requirement, complete the transformation of this base shaft tower, the above-mentioned Lightning Transformation for the wire i.e. Management strategy of base shaft tower for this reason.
The foregoing is only preferred embodiment of the present invention, the interest field of the present invention can not be limited with this, therefore, within the spirit and principles in the present invention all, any amendment of making, equivalent replacement, improvement etc., all should be included within right of the present invention.
Claims (3)
1. the wire trip-out rate based on segmentation landform calculates and an appraisal procedure, it is characterized in that, comprises the steps:
1) terrain data mining analysis: based on high precision landform relief data, by obtaining coordinate, difference of elevation, height above sea level, gradient internal attribute information to its degree of depth mining analysis, sets up geographic information database;
2) the horizontal lightning drawing range geometric ratio of shaft tower divides: with transmission line of electricity trend for longitudinal datum line, based on shaft tower inherent parameters, calculate the horizontal lightning drawing range obtaining the shaft tower left and right sides, and horizontal lightning drawing range equal proportion be divided into 8 sections, obtain 8 Along ents and 1 central point, by horizontal, fore-and-aft distance respectively accurate Calculation obtain 8 Along ent coordinates;
3) segmentation of ground elevation value calculate: with step 2) in 8 Along ent coordinates be benchmark, the internal attribute information of 8 waypoints is transferred by database, obtain longitudinal difference of elevation and the transverse horizontal distance of 8 Along ents and central point, calculate the ground elevation value of 8 Along ent relative centre points respectively, the arithmetic mean getting left and right 4 Along ents respectively, as left and right ground elevation Equivalent Calculation value, realizes topography and geomorphology height reduction in circuit lightning drawing range;
4) shaft tower tripping rate with lightning strike is by calculating mutually: in units of left lead, central conductor, right side wire three-phase conducting wire, choose according to step 3) the calculating that corresponding ground inclination value carries out each phase conductor trip-out rate, then three-phase conducting wire trip-out rate is added and namely obtains shaft tower tripping rate with lightning strike;
5) damage to crops caused by thunder risk class assessment: with state's net tripping rate with lightning strike standard of electric pressure residing for transmission line of electricity for benchmark, dodge density value practically in conjunction with shaft tower and calculate the actual trip-out rate index of acquisition shaft tower, whether qualifiedly weigh each base shaft tower Lightning performance, realize the accurate screening of excessive risk shaft tower;
6) resolution special project is formulated: screen the excessive risk shaft tower that obtains as management goal using step 5), with step 4) each phase conductor trip-out rate result of calculation for foundation, with risk class, transformation funds and transformation target multidimensional degree information for constraint condition, formulate the optimum differentiated lightning protection assessment specific to wire and Management strategy, be specially: the shaft tower installation leakage conductor being D for damage to crops caused by thunder risk class is Lightning Transformation measure, and the assessment of the selection and correctional effect of installing phase will with wire trip-out rate result of calculation for foundation; For this base shaft tower, the highest phase A phase of trip-out rate result of calculation preferentially installed by lightning arrester, after installing, shaft tower tripping rate with lightning strike is B phase and C phase trip-out rate additive value 0.3499 time/hundred kilometers *, damage to crops caused by thunder risk class is C level, do not reach transformation target, then carry out the installation of C phase lightning arrester, now shaft tower tripping rate with lightning strike is 0.0966 time/hundred kilometers *, damage to crops caused by thunder risk class is A, reach transformation requirement, complete the transformation of this base shaft tower.
2. the wire trip-out rate based on segmentation landform according to claim 1 calculates and appraisal procedure, it is characterized in that, in described step 4) when shaft tower is single time shaft tower, if the phase sequence that shaft tower reads from left to right is: CBA, then C phase conductor trip-out rate calculates and gets left ground elevation value, B phase conductor trip-out rate calculates the arithmetic mean getting left ground elevation value, right ground elevation, and A phase conductor trip-out rate calculates and gets right ground elevation value.
3. the wire trip-out rate based on segmentation landform according to claim 1 calculates and appraisal procedure, it is characterized in that, in described step 5), state's net tripping rate with lightning strike standard of electric pressure residing for transmission line of electricity comprises study plot sudden strain of a muscle density value N
markand the trip-out rate index M under this condition
mark, shaft tower dodges density value N practically
realobtained by lightning location system, the actual trip-out rate index M of shaft tower
realmeet: M
real=N
real/ N
mark* M
mark.
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| CN104655986A (en) * | 2015-02-26 | 2015-05-27 | 国家电网公司 | Method for judging lightning stroke fault point of tripped transmission line |
| CN108846228B (en) * | 2018-06-27 | 2020-11-10 | 广东电网有限责任公司电力科学研究院 | Distribution line rocket lightning triggering test method with conventional configuration of lightning arrester |
| 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 |
| CN110298101A (en) * | 2019-06-24 | 2019-10-01 | 国网浙江省电力有限公司电力科学研究院 | A kind of transmission line of electricity wind-excited responese finite element method coupling wind system |
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| 电网雷害风险评估技术研究;赵淳等;《高电压技术》;20111231;第37卷(第12期);3012-3020 * |
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| CN104217010A (en) | 2014-12-17 |
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