CN105449586A - Corridor tree span design method of electric transmission line - Google Patents
Corridor tree span design method of electric transmission line Download PDFInfo
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- CN105449586A CN105449586A CN201610005895.7A CN201610005895A CN105449586A CN 105449586 A CN105449586 A CN 105449586A CN 201610005895 A CN201610005895 A CN 201610005895A CN 105449586 A CN105449586 A CN 105449586A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/04—Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem"
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/06—Electricity, gas or water supply
Abstract
A corridor tree span design method of electric transmission line comprises steps as follows: cutting down 3-5 analysis trees in the wood in which a high voltage line is to be erected, after every tree is cut down, sectionally cutting out round discs according to length of 2 m, counting the annual rings of every round disc, measuring the diameter of every annual ring, drawing a stem analysis cross-section diagram, taking the Richards model as a prediction model, fitting by a correction index model at the same time, obtaining the theoretical values of the annual growth amount of the trees, predicting the future growth amount according to a regression curve, calculating the tree height prediction values and tree height growth limit values of different ages according to the future growth amount, carrying out optimized type selection design to overhead line structures according to estimated natural maximum growth height of the trees. The invention is advantaged by accurately predicting the height of the corridor trees, rationally designing the height of the overhead line structures, realizing erecting over the trees, finally ensuring safe operation of the power line, reducing construction cost, avoiding cutting the trees in large area and protecting the ecological environment and the forest cover.
Description
Technical field
The present invention relates to a kind of process, particularly a kind of power transmission line corridor trees cross over method for designing.
Background technology
In recent years; along with the fast development of national economy, power grid construction has been impelled to welcome unprecedented high-tide period, meanwhile; the contradiction of power grid construction especially between the construction of transmission line and environmental protection is also protruded day by day; construction period is short on the one hand, and building cost control is strict, and line corridor resource is more and more precious on the other hand; the requirement of Environmental protection is more and more higher; line corridor is cleared up, and especially in passage, the cleaning of trees is not only costly, and very difficult.In current national transmission line construction engineering, because in line channel trees existence and affect the event that duration and line security run and happen occasionally, construction unit not only pays a large amount of trees compensations, and biological environment, the water and soil conservation of returning locality cause serious injury.
For solving the problem; best construction method is exactly by science, the self-sow height assessing trees exactly; by optimal design and the advanced stringing technique of overhead line structures; finally realize high across Poling Construction; thus reach the safe operation both ensureing power circuit; reduce project cost, the infringement of power circuit to natural environment can be reduced again, protect biological environment and forest cover.But so far, still do not have the power transmission line corridor trees height appraisal procedure of complete set can science, assess the self-sow height of power transmission line corridor trees exactly, overhead line structures design is caused to lack theoretical foundation, cause overhead line structures design height too high or too low, will inevitably construction cost be increased when designing too high and cause waste, when designing too low along with the growth of trees is less than safe distance by causing the vertical range of conductor spacing treetop, making power department have to increase overhead line structures height, also cause waste because repeating construction.
Summary of the invention
Technical problem to be solved by this invention be to provide a kind of can science, predict the naturally most Seedling height height of power transmission line corridor trees exactly, thus can appropriate design determination overhead line structures height, the power transmission line corridor trees realized the leap of trees is set up cross over method for designing.
For solving the problem, the present invention adopts following technical scheme:
A kind of power transmission line corridor trees cross over method for designing, comprise step as follows:
1, stem analysis
In the woods for the treatment of erection high-tension line, trees 3 ~ 5 strain is resolved in felling, intercepts disk after being cuted down by every strain trees according to the long segmentation of 2m, vouches the annual ring number of each disk and measures each year wheel diameter drafting stem analysis profile;
2, Tree height growth prediction
Select Richards model as the forecast model of Tree height growth, select the modified index model of Tree height growth curve to carry out matching simultaneously, obtain the theoretical value of the every year increment of trees, and predict following increment according to regression curve, calculate all ages and classes height of tree predicted value and Tree height growth limiting value according to this;
Height of tree expression formula based on Richards model is: y=a × (1-e
-kx)
b; (1)
Height of tree expression formula based on modified index model is: y=K-A × B
x; (2)
Wherein: y is the height of tree, x is the age of tree; Each parameter in two models passes through iterative, B value in k value in (1) formula and (2) formula is set as iterative parameter, specify between iterative region and iteration relative error, Optimal Iterated Parameter is solved by Fibonacci method, other model parameter is solved, through iterating and finally solving enough accurate parameters according to maximum relativity criterion by least square method; Draw each parameter in two models and mathematic(al) representation as follows:
Height of tree expression formula based on Richards model is: y=31.7527 × (1-e
-0.1348x)
1.2728;
Height of tree expression formula based on modified index model is: y=31.5567-33.9224 × 0.8848
x;
By cut down and resolve the age of tree of trees and substitute in above-mentioned formula, draw height of tree actual value and each model theory value and set up chart I; By cut down and resolve the age of tree of trees and substitute in above-mentioned formula, draw each model tree Seedling height predicted value, set up chart II;
3, according to the naturally most Seedling height limiting value of the trees that evaluate, build overhead line structures, make to be erected at minimum perpendicular distance >=4.5 meter of the naturally most Seedling height limiting value of trees that namely the transmission line wire distance treetop on overhead line structures evaluate.
As further preferably, analytic tree ebon age of felling in described step 1 is 10 ~ 15 years.
As preferred further, after calculating all ages and classes height of tree theoretical value according to two models of described step 2, carry out the inspection of fitting result with index of correlation R and the recurrence standard deviation S showing actual value and theoretical value dispersion degree of display actual value and theoretical value tightness degree.
As preferred further,
Wherein: R={1-[Σ (y
i-y
i')
2/ Σ (y
i-y ')
2]
1/2;
S＝[Σ(y
i-y
i′)
2/(n-f)]
1/2；
In formula: y
i-the i-th age height of tree actual value;
Y
i'-the i-th age height of tree theoretical value;
The mean value of y '-height of tree actual value;
N-sample number;
Number of parameters in f-model.
The invention has the beneficial effects as follows: adopt these power transmission line corridor trees cross over method for designing can science, the exactly forecast assessment transmission line corridor trees that will cross over highly; thus can appropriate design determination overhead line structures height; realize setting up the leap of trees; finally reach the safe operation both having ensured power circuit; reduce project cost; large area can be avoided again to fall trees, reduce power circuit to the infringement of natural calamity, protect the object of biological environment and forest cover.
Accompanying drawing explanation
Fig. 1 is stem analysis sectional arrangement drawing of the present invention.
Embodiment
A kind of power transmission line corridor trees that the present invention relates to cross over method for designing, comprise step as follows:
1, stem analysis
In the woods for the treatment of erection high-tension line, trees 3 ~ 5 strain is resolved in felling, the present embodiment parsing trees to be crossed over are for 107 poplars, disk is intercepted according to the long segmentation of 2m after being cuted down by every strain trees, as shown in Figure 1, vouch the annual ring number of each disk and measure each year wheel diameter drafting stem analysis profile, adopting diagram method to determine the actual growing height of the annual height of tree.As preferably, described analytic tree ebon age of felling is 10 ~ 15 years.For improving the accuracy of prediction, select the trees of more than the 13 years age of trees as parsing trees, the present embodiment is using 13 years annual height of tree data of the age of tree as the basic data of models fitting.
According to cut down parsing tree positions, select from the position away from cut down peripheral about 1 meter of analytic tree ebon hat, cut down in every strain and resolve other each 1 of the shoveling earth complete section face of trees; Every section analyzes soil sample 5 and soil chemistry nutrient analysis soil sample 5 according to fetch earth 6, the soil cutting ring sample of earth physical analysis, the soil texture of soil natural genetic horizon, carries out labor and record to soil profile layer, interlayer, intrusive body and Root Distribution situation; For grasping the impact of soil on arboreal growth;
2, Tree height growth prediction
Because the growing height of trees generally can through the growth course of slowly-vigorous-slowly-stopping with the increase at age, present " S " sigmoid growth curve, therefore select Richards model as the forecast model of Tree height growth, select the modified index model of Tree height growth curve to carry out matching simultaneously, obtain the theoretical value of the every year increment of trees, and predict following increment according to regression curve, calculate all ages and classes height of tree predicted value and Tree height growth limiting value according to this;
Height of tree expression formula based on Richards model is: y=a × (1-e
-kx)
b;
Height of tree expression formula based on modified index model is: y=K-A × B
x;
Wherein y is the height of tree, x is the age of tree, each parameter in two models passes through iterative, B value in k value in (1) formula and (2) formula is set as iterative parameter, specify between iterative region and iteration relative error, solve Optimal Iterated Parameter by Fibonacci method, solve other model parameter by least square method, through iterating and finally solving enough accurate parameters according to maximum relativity criterion; Draw each parameter in two models and mathematic(al) representation as follows:
Height of tree expression formula based on Richards model is: y=31.7527 × (1-e
-0.1348x)
1.2728;
Height of tree expression formula based on modified index model is: y=31.5567-33.9224 × 0.8848
x;
By cut down and resolve the age of tree of trees and substitute in above-mentioned formula, draw height of tree actual value and each model theory value, set up chart I, chart I is as follows:
By cut down and resolve the age of tree of trees and substitute in above-mentioned formula, draw each model tree Seedling height predicted value, set up chart II, chart II is as follows:
After calculating all ages and classes height of tree theoretical value according to above-mentioned two models, carry out the inspection of fitting result with index of correlation R and the recurrence standard deviation S showing actual value and theoretical value dispersion degree of display actual value and theoretical value tightness degree.
Wherein: R={1-[Σ (y
i-y
i')
2/ Σ (y
i-y ')
2]
1/2;
S＝[Σ(y
i-y
i′)
2/(n-f)]
1/2；
In formula: y
i-the i-th age height of tree actual value;
Y
i '-the i-th age height of tree theoretical value;
The mean value of y '-height of tree actual value;
N-sample number;
Number of parameters in F-model.
By cut down and resolve the age of tree of trees and substitute in above-mentioned inspection formula, draw Height growth simulating Fitness Test result, set up chart III, chart III is as follows:
| Model name | R | S |
| Richards model | 0.9986 | 0.4491 |
| Modified index | 0.9985 | 0.4573 |
As can be seen from table III, actual value and the theoretical value matching of 2 models are tight, R value is higher than 0.99, S value is lower than 0.50, illustrate that actual value and the theoretical value matching of Richards model are tightr, and during x=0, y=0, also meet biological meaning, therefore adopt this model predication value determination height of tree more accurate.
From Table Ⅰ and Table Ⅱ reach a conclusion for: transmission line cross over trees-107, corridor poplar maximum growth height be 31.7 meters, its maturity period is 15-20, then enters retardation phase.
3, according to the naturally most Seedling height limiting value of the trees that evaluate, build overhead line structures, make to be erected at minimum perpendicular distance >=4.5 meter of the naturally most Seedling height limiting value of trees that namely the line conductor distance treetop on overhead line structures evaluate.
Although embodiment of the present invention are open as above, but it is not restricted to listed in specification and execution mode utilization, it can be applied to various applicable the field of the invention completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and illustrates here and the legend described.
Claims (4)
1. power transmission line corridor trees cross over a method for designing, it is characterized in that comprising step as follows:
(1), stem analysis
In the woods for the treatment of erection high-tension line, trees 3 ~ 5 strain is resolved in felling, intercepts disk after being cuted down by every strain trees according to the long segmentation of 2m, vouches the annual ring number of each disk and measures each year wheel diameter drafting stem analysis profile;
(2), Tree height growth prediction
Select Richards model as the forecast model of Tree height growth, select the modified index model of Tree height growth curve to carry out matching simultaneously, obtain the theoretical value of the every year increment of trees, and predict following increment according to regression curve, calculate all ages and classes height of tree predicted value and Tree height growth limiting value according to this;
Height of tree expression formula based on Richards model is: y=a × (1-e
-kx)
b; (1)
Height of tree expression formula based on modified index model is: y=K-A × B
x; (2)
Wherein: y is the height of tree, x is the age of tree; Each parameter in two models passes through iterative, B value in k value in (1) formula and (2) formula is set as iterative parameter, specify between iterative region and iteration relative error, Optimal Iterated Parameter is solved by Fibonacci method, other model parameter is solved, through iterating and finally solving enough accurate parameters according to maximum relativity criterion by least square method; Draw each parameter in two models and mathematic(al) representation as follows:
Height of tree expression formula based on Richards model is: y=31.7527 × (1-e
-0.1348x)
1.2728;
Height of tree expression formula based on modified index model is: y=31.5567-33.9224 × 0.8848
x;
By cut down and resolve the age of tree of trees and substitute in above-mentioned formula, draw height of tree actual value and each model theory value and set up chart I; By cut down and resolve the age of tree of trees and substitute in above-mentioned formula, draw each model tree Seedling height predicted value, set up chart II;
(3), according to the naturally most Seedling height limiting value of the trees that evaluate, build overhead line structures, make to be erected at minimum perpendicular distance >=4.5 meter of the naturally most Seedling height limiting value of trees that namely the transmission line wire distance treetop on overhead line structures evaluate.
2. power transmission line corridor trees according to claim 1 cross over method for designing, it is characterized in that: analytic tree ebon age of felling in described step (1) is 10 ~ 15 years.
3. power transmission line corridor trees according to claim 1 cross over method for designing, it is characterized in that: after calculating all ages and classes height of tree theoretical value according to two models of described step (2), carry out the inspection of fitting result with index of correlation R and the recurrence standard deviation S showing actual value and theoretical value dispersion degree of display actual value and theoretical value tightness degree.
4. power transmission line corridor trees according to claim 3 cross over method for designing, it is characterized in that:
Described index of correlation R and recurrence standard deviation S formula are respectively:
R＝{1-[Σ(y
i-y′
i)
2/Σ(y
i-y′)
2]}
1/2；
S＝[Σ(y
i-y′
i)
2/(n-f)]
1/2；
In formula: y
i-the i-th age height of tree actual value;
Y '
i-the i-th age height of tree theoretical value;
The mean value of y '-height of tree actual value;
N-sample number;
Number of parameters in f-model.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107705049A (en) * | 2017-11-13 | 2018-02-16 | 陈杰 | A kind of trees protection management method and system based on power circuit |
| CN110502809A (en) * | 2019-08-05 | 2019-11-26 | 中国能源建设集团江苏省电力设计院有限公司 | A kind of design method of overhead transmission line engineering trees felling figure |
| CN110727907A (en) * | 2019-09-18 | 2020-01-24 | 宁夏宁电电力设计有限公司 | Method for calculating cutting range of trees below power transmission line |
| CN111259835A (en) * | 2020-01-20 | 2020-06-09 | 云南电网有限责任公司电力科学研究院 | Method for predicting tree growth trend in power transmission line area based on satellite technology |
| CN112466104A (en) * | 2020-11-30 | 2021-03-09 | 深圳供电局有限公司 | Tree obstacle early warning method and early warning system for power grid power transmission line |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107705049A (en) * | 2017-11-13 | 2018-02-16 | 陈杰 | A kind of trees protection management method and system based on power circuit |
| CN110502809A (en) * | 2019-08-05 | 2019-11-26 | 中国能源建设集团江苏省电力设计院有限公司 | A kind of design method of overhead transmission line engineering trees felling figure |
| CN110502809B (en) * | 2019-08-05 | 2022-06-10 | 中国能源建设集团江苏省电力设计院有限公司 | Design method of overhead transmission line engineering tree felling map |
| CN110727907A (en) * | 2019-09-18 | 2020-01-24 | 宁夏宁电电力设计有限公司 | Method for calculating cutting range of trees below power transmission line |
| CN110727907B (en) * | 2019-09-18 | 2023-06-16 | 宁夏宁电电力设计有限公司 | Calculation method for tree felling range below power transmission line |
| CN111259835A (en) * | 2020-01-20 | 2020-06-09 | 云南电网有限责任公司电力科学研究院 | Method for predicting tree growth trend in power transmission line area based on satellite technology |
| CN112466104A (en) * | 2020-11-30 | 2021-03-09 | 深圳供电局有限公司 | Tree obstacle early warning method and early warning system for power grid power transmission line |
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Inventor after: Cui Jisheng Inventor after: Chen Chuan Inventor after: Qiu Peng Inventor after: Zhang Yibo Inventor before: Zhang Yibo |
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