CN102279352B - Corona test method for effect of direct current transmission line on adjacent trees - Google Patents
Corona test method for effect of direct current transmission line on adjacent trees Download PDFInfo
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- CN102279352B CN102279352B CN 201110159401 CN201110159401A CN102279352B CN 102279352 B CN102279352 B CN 102279352B CN 201110159401 CN201110159401 CN 201110159401 CN 201110159401 A CN201110159401 A CN 201110159401A CN 102279352 B CN102279352 B CN 102279352B
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Abstract
The invention relates to a corona test method for effect of direct current transmission line on adjacent trees, which comprises the following steps of: (1) arranging a corona test device for the effect of direct current transmission line on adjacent trees, which comprises a travelling lifting platform, a container, a test tree, positive and negative wires and a ultraviolet imager; (2) planting the test tree in the container; (3) placing the travelling lifting platform under the test line ; (4) arranging the test tree on the travelling lifting platform, connecting the root of test tree with ground by a grounding wire; (5) changing distances between the test tree and the positive and negative wires; (6) supplying power to the test line by a direct current test power supply; (7) observing corona phenomenon of a crown of the test tree in the electric field by the ultraviolet imager to obtain minimum vertical distance of the direct current transmission line and the tree at the beginning of the obvious corona phenomenon. By adopting the method, the forest resource and the ecological environment can be effectively protected, the project investment can be controlled; and the method can be widely used in the forest industry in the high-voltage project and the forest protection.
Description
Technical field
The present invention relates to a kind of corona test method, particularly about the corona test method of a kind of DC power transmission line on contiguous trees impact.
Background technology
Minimum perpendicular distance between direct-current overhead power transmission line and trees not only should satisfy the safe operation requirement of transmission line of electricity, the abnormal ecological effect that may occur in the time of also should considering the contiguous transmission line of electricity of trees.The trees that grow under highfield below DC power transmission line, corona may appear in the tree crown part of its adjacent wires; When trees and wire were close to a certain degree, burn may appear in the end of trees.Therefore, when the design DC power transmission line, should make and leave enough distances between circuit and trees, but blindness increases the distance of wire and tree crown, can cause unnecessary track investment cost.The corona phenomenon that partly occurs due to tree crown under highfield is the main cause of trees burn, and therefore, the corona test that carries out trees under transmission line of electricity is one of important content of minimum perpendicular distance between research transmission line of electricity and trees.
Summary of the invention
For the problems referred to above, the purpose of this invention is to provide and a kind ofly can effectively protect forest tree resource and ecologic environment, effectively the corona test method of the DC power transmission line of control engineering investment on contiguous trees impact.
For achieving the above object, the present invention takes following technical scheme: the corona test method of a kind of DC power transmission line on contiguous trees impact, and its step is as follows: (1) arranges one and comprises that the DC power transmission line of positive wire, cathode conductor and ultraviolet imager of mobile hoistable platform, container, test trees, test line segment is on the corona test device of contiguous trees impact; (2) will test planting tree in container; (3) successively mobile hoistable platform being positioned over the positive wire of test line segment and the below of cathode conductor tests; The test trees that (4) will be planted in container are placed on mobile hoistable platform, and the root that will test trees with ground wire is connected with the earth; (5) adjust the height of mobile hoistable platform, change tree crown and positive wire or the tree crown of test trees and the distance between cathode conductor of test trees; (6) test line segment is powered by DC experiment power supply, and the voltage of DC experiment power supply is adjusted to the required voltage of test, and the tree crown of testing trees is begun test; (7) use the corona phenomenon of tree crown in electric field of ultraviolet imager viewing test trees; If obvious corona phenomenon does not appear in the tree crown of test trees, mobile hoistable platform raises; If obvious corona phenomenon appears in the tree crown of test trees, reduce mobile hoistable platform, the minimum perpendicular distance when obtaining just obvious corona phenomenon having occurred between DC power transmission line and trees.
In described step (1), the lifting travel of described mobile hoistable platform arranges according to the distance to the ground of the test height of trees and positive wire, cathode conductor.
The lifting travel of described mobile hoistable platform is 10m.
In described step (1), described positive wire and described cathode conductor be arranged in parallel along surface level.
In described step (5), the tree crown and the initial distance between described positive wire of described test trees is set, and describedly tests the tree crown of trees and the initial distance between described cathode conductor is 10m.
The ultraviolet sensitivity of described ultraviolet imager is 3 * 10
-18W/cm
2, corona detection sensitivity is is 1.5～2pC in 8m place's shelf depreciation sensitivity.
The present invention is owing to taking above technical scheme; it has the following advantages: 1, the present invention is due to the corona phenomenon of tree crown in electric field that adopts ultraviolet imager viewing test trees; can determine minimum perpendicular distance between DC power transmission line and trees; therefore; effectively protect forest tree resource and ecologic environment, and effectively controlled construction investment.2, the present invention owing to adopting mobile hoistable platform bearing test trees, realizes the adjusting of distance between test trees and positive wire, cathode conductor, can avoid testing the trees tree crown by the dizzy burn of forceful electric power.3, the present invention is owing to adopting ground wire to be communicated with the earth at the test trees ' root, like this can be so that the trees that plant on the electric circumstance of the test trees in container and ground be consistent, and then guaranteed that the present invention can use in practice preferably.The present invention can be widely used in the Forestry Ecological in high-voltage engineering and Forest Protection.
Description of drawings
Fig. 1 is test unit one-piece construction schematic diagram of the present invention;
Fig. 2 is the vertical view of Fig. 1.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
As shown in Figure 1 and Figure 2, the corona test device of the contiguous trees impact of DC power transmission line of the present invention comprises positive wire 4, cathode conductor 5 and the ultraviolet imager (not shown) of mobile hoistable platform 1, container 2, test trees 3, test line segment, wherein, positive wire 4 be arranged in parallel along surface level with cathode conductor 5.
Mobile hoistable platform 1 is used for carrying and is placed on test trees 3 in container 2, by the distance between mobile hoistable platform 1 adjusting test trees 3 and positive wire 4, cathode conductor 5.The lifting travel of mobile hoistable platform 1 arranges according to the distance to the ground of the test height of trees and positive wire 4, cathode conductor 5, it is 10m that the present invention adopts the lifting travel of mobile hoistable platform 1, lifting load carrying can satisfy the institute bearing test trees 3 weight requirement of (comprising cultivating soil and container 2), and platform size satisfies the dimensional requirement of container 2.
The root of test trees 3 connects the earth by ground wire 6, and ground wire 6 is plain conductor.
The positive wire 4 of test line segment, cathode conductor 5 are used for the analog DC overhead transmission line; Level interval between the distance to the ground of positive wire 4 and cathode conductor 5 and positive wire 4 and cathode conductor 5 all can be regulated.Wherein, positive wire 4, the cathode conductor 5 of test line segment provide power supply by DC experiment power supply for it, and the working voltage of DC experiment power supply can satisfy the working voltage of test line segment.
Ultraviolet imager is used for the corona of viewing test trees 3.The ultraviolet imager technical parameter that the present invention adopts is: ultraviolet sensitivity is 3 * 10
-18W/cm
2, corona detection sensitivity is is 1.5～2pC in 8m place's shelf depreciation sensitivity.
The corona test method of DC power transmission line of the present invention on contiguous trees impact, its step is as follows:
1) will test trees 3 and be planted in container 2, warranty test trees 3 are in normal existing state at duration of test;
2) successively mobile hoistable platform 1 being positioned over the positive wire 4 of test line segment and the below of cathode conductor 5 tests;
The test trees 3 that 3) will be planted in container 2 are placed on mobile hoistable platform 1, and the root that will test trees 3 with ground wire 6 is connected with the earth;
4) adjust the height of mobile hoistable platform 1, between the tree crown that changes test trees 3 and positive wire 4 or test the tree crown of trees 3 and the distance between cathode conductor 5, tree crown and the initial distance between cathode conductor 5 of the tree crown of test trees 3 and positive wire 4 or test trees 3 should be far away, for example 10m, burn in order to avoid tree crown is swooned by forceful electric power;
5) test line segment is powered by DC experiment power supply, and the voltage of DC experiment power supply is adjusted to the required voltage of test, and the tree crown of testing trees 3 is begun test;
6) use the corona phenomenon of tree crown in electric field of ultraviolet imager viewing test trees 3; If obvious corona phenomenon does not appear in the tree crown of test trees 3, mobile hoistable platform 1 raises; If obvious corona phenomenon appears in the tree crown of test trees 3, reduce mobile hoistable platform 1, and then the minimum perpendicular distance when obtaining just obvious corona phenomenon having occurred between DC power transmission line and trees.
In sum, by the corona test method of DC power transmission line of the present invention on contiguous trees impact, can finally draw when obvious corona occurring, the test tree crown of trees 3 and test distance farthest, positive wire 4 and cathode conductor 5 between positive wire 4 and cathode conductor 5 to data such as ground level, DC experiment voltage and trees kind titles, these are important foundation data of minimum perpendicular distance between researching DC transmission line of electricity and trees.Therefore, can determine minimum perpendicular distance between DC power transmission line and trees, effectively protect forest tree resource and ecologic environment, and effectively control construction investment.
The various embodiments described above only are used for explanation the present invention, and on the basis of technical solution of the present invention, all improvement and equivalents of individual steps being carried out according to the principle of the invention all should not got rid of outside protection scope of the present invention.
Claims (6)
1. a DC power transmission line is on being close to the corona test method of trees impact, and its step is as follows:
(1) arrange one and comprise that the DC power transmission line of positive wire, cathode conductor and ultraviolet imager of mobile hoistable platform, container, test trees, test line segment is on the corona test device of contiguous trees impact;
(2) will test planting tree in container;
(3) successively mobile hoistable platform being positioned over the positive wire of test line segment and the below of cathode conductor tests;
The test trees that (4) will be planted in container are placed on mobile hoistable platform, and the root that will test trees with ground wire is connected with the earth;
(5) adjust the height of mobile hoistable platform, change tree crown and positive wire or the tree crown of test trees and the distance between cathode conductor of test trees; The tree crown and the initial distance between described positive wire of described test trees are set, and describedly test the tree crown of trees and the initial distance between described cathode conductor is 10m;
(6) test line segment is powered by DC experiment power supply, and the voltage of DC experiment power supply is adjusted to the required voltage of test, and the tree crown of testing trees is begun test;
(7) use the corona phenomenon of tree crown in electric field of ultraviolet imager viewing test trees; If obvious corona phenomenon does not appear in the tree crown of test trees, mobile hoistable platform raises; If obvious corona phenomenon appears in the tree crown of test trees, reduce mobile hoistable platform, the minimum perpendicular distance when obtaining just obvious corona phenomenon having occurred between DC power transmission line and trees.
2. a kind of DC power transmission line as claimed in claim 1 is on being close to the corona test method of trees impact, it is characterized in that: in described step (1), the lifting travel of described mobile hoistable platform arranges according to the distance to the ground of the test height of trees and positive wire, cathode conductor.
3. a kind of DC power transmission line as claimed in claim 2 is on being close to the corona test method of trees impact, and it is characterized in that: the lifting travel of described mobile hoistable platform is 10m.
4. as claim 1 or the 2 or 3 described a kind of DC power transmission line corona test method on contiguous trees impact, it is characterized in that: in described step (1), described positive wire and described cathode conductor be arranged in parallel along surface level.
5. as claim 1 or the 2 or 3 described a kind of DC power transmission line corona test method on contiguous trees impact, it is characterized in that: the ultraviolet sensitivity of described ultraviolet imager is 3 * 10
-18W/cm
2, corona detection sensitivity is is 1.5～2pC in 8m place's shelf depreciation sensitivity.
6. a kind of DC power transmission line as claimed in claim 4 is on being close to the corona test method of trees impact, and it is characterized in that: the ultraviolet sensitivity of described ultraviolet imager is 3 * 10
-18W/cm
2, corona detection sensitivity is is 1.5～2pC in 8m place's shelf depreciation sensitivity.
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| CN 201110159401 CN102279352B (en) | 2011-06-14 | 2011-06-14 | Corona test method for effect of direct current transmission line on adjacent trees |
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| CN 201110159401 CN102279352B (en) | 2011-06-14 | 2011-06-14 | Corona test method for effect of direct current transmission line on adjacent trees |
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| CN102866332A (en) * | 2012-09-26 | 2013-01-09 | 上海市电力公司 | On-line corona discharge detection system for cable terminal |
| CN109444688B (en) * | 2018-11-15 | 2020-11-06 | 国网山西省电力公司大同供电公司 | 10kV distribution network insulated conductor and tree obstacle's thunderbolt analogue test platform |
| CN109254234A (en) * | 2018-11-22 | 2019-01-22 | 云南电网有限责任公司红河供电局 | A kind of trees-wire electrical discharge simulation experiment method |
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| JP2007205780A (en) * | 2006-01-31 | 2007-08-16 | Kansai Electric Power Co Inc:The | Electric energy examination device |
| CN100483144C (en) * | 2006-05-31 | 2009-04-29 | 清华大学深圳研究生院 | Corona detecting method and system for insulator remote surface on optical amplifier |
| CN101236226A (en) * | 2008-01-29 | 2008-08-06 | 国网武汉高压研究院 | Ultrahigh voltage transmission lines hardware corona test method based on ultraviolet imagery technology |
| CN101672885A (en) * | 2008-09-12 | 2010-03-17 | 黑龙江省电力科学研究院 | Method for on-line detecting external insulation state of electric transmission and transformation equipment |
| CN101551435B (en) * | 2009-05-15 | 2011-06-08 | 湖北省电力试验研究院 | Method for detecting corona discharging and device thereof |
| CN101949998B (en) * | 2010-09-10 | 2012-10-10 | 致茂电子(苏州)有限公司 | Corona sensing device and method and voltage resistance tester |
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Non-Patent Citations (4)
| Title |
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| 800kV直流输电线路对邻近树木影响的研究;薛辰东 等;《电网技术》;20120531;第36卷(第5期);47-50 * |
| 王旭光 苏杰.高压输电线路电晕检测中紫外成像仪.《华北电力大学学报》.2010,第37卷(第4期), |
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