CN105547985A - Closed type wire sandstorm erosion simulation test device and closed type wire sandstorm erosion simulation test method - Google Patents
Closed type wire sandstorm erosion simulation test device and closed type wire sandstorm erosion simulation test method Download PDFInfo
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Abstract
The invention discloses a closed type wire sandstorm erosion simulation test device and a closed type wire sandstorm erosion simulation test method. The closed type wire sandstorm erosion simulation test device comprises erosion simulation laboratories, wherein an air duct which is in end-to-end connection is formed because a low-speed erosion simulation laboratory and a high-speed erosion simulation laboratory are communicated through a pipeline; an axial flow fan which is used for generating circulating air in the air duct is arranged in a power section of the air duct; sandstorm inlets are formed in upper air openings of the erosion simulation laboratories. The closed type wire sandstorm erosion simulation test method comprises the following steps: a, detecting parameters related to wire sandstorm erosion in a simulated zone; b, selecting the erosion simulation laboratories; c, fixing a wire sample; d, starting the axial flow fan; e, carrying out a simulation test; f, detecting. The closed type wire sandstorm erosion simulation test device and the closed type wire sandstorm erosion simulation test method, disclosed by the invention, have the characteristics that the equipment operation is reliable, the simulation is vivid, a testing result is objective and real, and the like; according to the closed type wire sandstorm erosion simulation test method, the wire erosion rule can be found out, so that measures can be purposefully taken, and the service life of a wire is prolonged.
Description
Technical field
The invention belongs to research dust storm particle to the affecting laws experimental study field of conductive line surfaces erosion performance.
Background technology
Current China has built up 750kV ultra-high-tension power transmission line, and these circuits are positioned at the location that northwest sandstorm takes place frequently.Sandstorm weather comes interim, and dust storm particle carries certain kinetic energy impact transmission line wire surface, and transmission line wire top layer is subjected to the erosion of dust storm, and rough pattern appears in surface.Wire after corroded by dust storm, surface structure is irregular and adhere to filthy particle, makes operating transmission line of electricity generation corona discharge.Corona discharge has a strong impact on the electric energy conveying of transmission line of electricity, according to statistics, and China's internal cause corona loss in a year and the electric energy that consumes can reach 20.5 hundred million degree.In addition, corona discharge also produces stronger pulse electromagnetic wave, can cause very large interference to wireless communication.In addition, therefore the life-span of transmission line of electricity also can reduce.
Transmission line of electricity corona characteristic has many influence factors, and wherein, the surface state of wire is one of important factor of influence.Given this, study the affecting laws of dust storm particle to conductive line surfaces erosion performance and there is great importance.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of closed wire dust storm and corrodes simulation test device and test method thereof, it have equipment reliable, simulate the features such as true to nature, test result objective reality, this method can find out wire Erosion Law, thus take measures targetedly, extension lead serviceable life.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of closed wire dust storm corrodes simulation test device, comprises erosion simulation laboratory, and the inwall of erosion simulation laboratory is provided with the fixture for fixing cord sample, and is provided with for the hermetyic window at erosion simulation test chamber interior walls fixing test wire; Corroding simulation laboratory can make passed through air-flow be laminar condition, grains of sand apparatus for measuring concentration in wind speed measuring device and wind is provided with in erosion simulated experiment indoor, corroding simulation laboratory is two, be respectively low speed corrode simulation laboratory and corrode simulation laboratory at a high speed, the cross-sectional area of low speed erosion simulation laboratory is 1.5-2 times of High Speed Analog laboratory cross-sectional area; Low speed corrodes simulation laboratory and corrodes at a high speed simulation laboratory and forms end to end air channel by pipeline communication, in the power section in air channel, be provided with the propeller fan for producing recirculating air in air channel, the uptake corroding simulation laboratory and/or high speed erosion simulation laboratory at low speed is provided with sand inlet.
The present invention improves further and is:
Air channel is rectangular configuration.
The wind direction that propeller fan produces is flow to clockwise.
Corrode at a high speed simulation laboratory means for two very close shafts flow blow air intake opening, and the two is positioned on a corresponding long side pipe road of rectangular duct; Low speed corrodes simulation laboratory and is positioned on another corresponding long side pipe road of rectangular duct.
Corresponding two the minor face conduit cross-sectional areas of rectangular duct are all greater than two corresponding long side pipe road cross-sectional areas of rectangular duct, and two minor face pipelines and two long side pipe roads are seamlessly transitted by toroidal pipeline.
A kind of wire dust storm corrodes simulation experiment method, comprises the following steps:
A, detect simulate area and to corrode in the relevant wind speed of wire, wind the parameters such as grains of sand concentration, sand particle size with dust storm;
B, according to the wind speed parameter detected in step a, closed wire dust storm is selected to corrode erosion simulation laboratory (low speed corrodes simulation laboratory or corrodes simulation laboratory at a high speed) suitable in simulation test device;
C, get experiment wire samples several, the circumference of wire samples is done several observation positions mark, the erosion simulated experiment several wire samples be fixed on selected in step b by fixture is indoor, and make the angle that the axis of wire samples and wind direction become different, to simulate the different angle of attack of dust storm;
D, unlatching propeller fan, by observing the data shown by the indoor wind speed measuring device of selected erosion simulated experiment, regulating shaft flow blow rotating speed, makes it identical with the wind speed parameter detected in step a; The grains of sand identical with the sand particle size parameter detected in step a are inserted by sand inlet, by observing grains of sand apparatus for measuring concentration parameter in wind, control grains of sand concentration in wind identical with grains of sand concentration parameter in the wind detected in step a, thus simulate the environment that dust storm corrodes wire;
E, determine the test period, within experimental period, to keep corroding in the wind speed of simulated experiment indoor, wind the parameters such as grains of sand concentration, sand particle size identical with the parameter detected in step a;
F, test period terminate, wire samples will be tested take out, utilize scanning electron microscope that the surface topography of several observation positions of wire circumference after dust storm particles erosion is taken into image, contrast the SEM image under the different angle of attack, diverse location, thus contrast the roughness after the erosion of different angle of attack lower wire sample circumference diverse location dust storm;
G, with the data recorded in step f, contrast the different angle of attack, different wind speed and the Changing Pattern around wire circumference diverse location upper conductor surfaceness, Matlab software is utilized to carry out matching the curve under above-mentioned three kinds of conditions, obtain the curve polynomial expression after matching, the contrast maximal value of roughness and the time of appearance thereof.
The present invention improves further and is:
After having carried out step f, utilize scanning electron microscope that the surface topography on wire samples circumference diverse location after dust storm particles erosion is taken into image, contrast the SEM image under the different angle of attack, diverse location, and by energy spectrogram, analyze the various element in wire samples surface comparatively before situation of change.
Wire samples in step c is four, and the axis of wire samples and wind direction are respectively 90 °, 60 °, 45 ° and 30 ° of angles.
In step c, the circumference of wire samples is done eight impartial observation position marks.
The step e determined test period is ten hours.
The beneficial effect adopting technique scheme to produce is:
The present invention includes erosion simulation laboratory, the inwall of erosion simulation laboratory is provided with the fixture for fixing cord sample, for being fixed wire samples to be tested, and be provided with for the hermetyic window at erosion simulation test chamber interior walls fixing test wire, for inserting wire samples to be tested, corroding simulation laboratory can make passed through air-flow be laminar condition, there is this kind of structure to meet test request, grains of sand apparatus for measuring concentration in wind speed measuring device and wind is provided with in erosion simulated experiment indoor, for monitoring the test parameter corroding simulated experiment indoor, corroding simulation laboratory is two, be respectively low speed corrode simulation laboratory and corrode simulation laboratory at a high speed, the cross-sectional area of low speed erosion simulation laboratory is 1.5-2 times of High Speed Analog laboratory cross-sectional area, can select according to test parameters, equipment is widely used, low speed corrodes simulation laboratory and corrodes at a high speed simulation laboratory and forms end to end air channel by pipeline communication, the propeller fan for producing recirculating air in air channel is provided with in the power section in air channel, form the circulation of closed loop wind, laboratory simulation is made to go out actual environment effect, the uptake corroding simulation laboratory and/or high speed erosion simulation laboratory at low speed is provided with sand inlet, for inserting the grains of sand, to simulate actual wind sand environment effect.
The effect that actual wind sand environment corrodes wire is gone out by this unit simulation, further investigation Sand Dust Environment is to the Erosion Law on overhead transmission line conductor surface, find out feasible measure to reduce the wearing and tearing of dust storm to conductive line surfaces, for extend transmission line wire mission life, reduce the loss aspect brought of corona there is important research value, and to have great significance for the normal operation of electric system.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation being fixed on angle between the wire samples of erosion simulation laboratory and wind direction.
In the accompanying drawings: 1, low speed corrodes simulation laboratory; 2, simulation laboratory is corroded at a high speed; 3, toroidal pipeline; 4, the power section in air channel; 5, sand inlet; 6, wire samples.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further elaborated.
Embodiment is as shown in Figure 1 known, and the present embodiment comprises erosion simulation laboratory, and the inwall of erosion simulation laboratory is provided with the fixture for fixing cord sample, and is provided with for the hermetyic window at erosion simulation test chamber interior walls fixing test wire; Corroding simulation laboratory can make passed through air-flow be laminar condition, grains of sand apparatus for measuring concentration (selecting the concentration meter of DUMO model to measure) in wind speed measuring device (adopt pitot tube combine measure) with digital wind speed Instrument for Pressure (XY-2000PA) and wind is provided with in erosion simulated experiment indoor, corroding simulation laboratory is two, be respectively low speed erosion simulation laboratory 1 and corrode simulation laboratory 2 at a high speed, the cross-sectional area of low speed erosion simulation laboratory 1 is 1.5-2 times of High Speed Analog laboratory 2 cross-sectional area; Low speed corrodes simulation laboratory 1 and corrodes at a high speed simulation laboratory 2 and forms end to end air channel by pipeline communication, in the power section 4 in air channel, be provided with the propeller fan for producing recirculating air in air channel, the uptake corroding simulation laboratory 1 and/or high speed erosion simulation laboratory 2 at low speed is provided with sand inlet 5.
Air channel is rectangular configuration.
The wind direction that propeller fan produces is flow to clockwise.
Corrode at a high speed simulation laboratory 2 means for two very close shafts flow blow air intake opening, and the two is positioned on a corresponding long side pipe road of rectangular duct; Low speed corrodes simulation laboratory 1 and is positioned on another corresponding long side pipe road of rectangular duct.
Corresponding two the minor face conduit cross-sectional areas of rectangular duct are all greater than two corresponding long side pipe road cross-sectional areas of rectangular duct, and two minor face pipelines and two long side pipe roads are seamlessly transitted by toroidal pipeline 3.
A kind of wire dust storm corrodes simulation experiment method, comprises the following steps:
A, collect the Northwest and test relevant various data, mainly comprising the on-site wind speed of wire, the concentration of the grains of sand, particle size parameters; When strong sandstorm occurs, wind speed is also more than 20m/s, and when extra-heavy sandstorm occurs, instantaneous wind speed is more than 25m/s; Under wind sand environment, when visibility is less than one meter, grains of sand concentration value is less than or equal to 1000mg/m3; The particle diameter of the test grains of sand is d<0.25mm and 0.25<d<0.5mm scope.
B, according to the wind speed parameter detected in step a, closed wire dust storm is selected to corrode erosion simulation laboratory (low speed corrodes simulation laboratory or corrodes simulation laboratory at a high speed) suitable in simulation test device;
The wire type that c, Northwest Grid 750kV transmission line of electricity mainly use is LGJ-400/50, gets conductor length 0.6m as wire samples length,
Get experiment wire samples four, the circumference of wire samples is done eight observation position marks, the erosion simulated experiment four wire samples be fixed on selected in step b by fixture with hydraulic tongs is indoor, and make the axis of wire samples and wind direction be respectively 90 °, 60 °, 45 ° and 30 ° of angles (as shown in Figure 2), to simulate the different angle of attack of dust storm;
D, unlatching propeller fan, by observing the data shown by the indoor wind speed measuring device of selected erosion simulated experiment, regulating shaft flow blow rotating speed, makes it identical with the wind speed parameter detected in step a; The grains of sand identical with the sand particle size parameter detected in step a are inserted by sand inlet, by observing grains of sand apparatus for measuring concentration parameter in wind, control grains of sand concentration in wind identical with grains of sand concentration parameter in the wind detected in step a, thus simulate the environment that dust storm corrodes wire;
E, determine that the test period is ten hours, within experimental period, to keep corroding in the wind speed of simulated experiment indoor, wind the parameters such as grains of sand concentration, sand particle size identical with the parameter detected in step a;
F, test period terminate, wire samples will be tested take out, utilize scanning electron microscope that the surface topography of wire circumference eight observation positions after dust storm particles erosion is taken into image, contrast the SEM image under the different angle of attack, diverse location, thus contrast the roughness after the erosion of different angle of attack lower wire sample circumference diverse location dust storm;
G, with the data recorded in step f, contrast the different angle of attack, different wind speed and the Changing Pattern around wire circumference diverse location upper conductor surfaceness, Matlab software is utilized to carry out matching the curve under above-mentioned three kinds of conditions, obtain the curve polynomial expression after matching, the contrast maximal value of roughness and the time of appearance thereof.
After having carried out step f, utilize scanning electron microscope that the surface topography on wire samples circumference diverse location after dust storm particles erosion is taken into image, contrast the SEM image under the different angle of attack, diverse location, and by energy spectrogram, analyze the various element in wire samples surface comparatively before situation of change.
Claims (10)
1. a closed wire dust storm corrodes simulation test device, it is characterized in that: comprise erosion simulation laboratory, the inwall of described erosion simulation laboratory is provided with the fixture for fixing cord sample, and is provided with for the hermetyic window at erosion simulation test chamber interior walls fixing test wire; Described erosion simulation laboratory can make passed through air-flow be laminar condition, grains of sand apparatus for measuring concentration in wind speed measuring device and wind is provided with in described erosion simulated experiment indoor, described erosion simulation laboratory is two, be respectively low speed corrode simulation laboratory (1) and corrode simulation laboratory (2) at a high speed, the cross-sectional area of described low speed erosion simulation laboratory (1) is 1.5-2 times of High Speed Analog laboratory (2) cross-sectional area; Described low speed corrodes simulation laboratory (1) and corroding simulation laboratory (2) forms end to end air channel by pipeline communication at a high speed, in the power section (4) in described air channel, be provided with the propeller fan for producing recirculating air in air channel, the uptake corroding simulation laboratory (2) described low speed erosion simulation laboratory (1) and/or high speed is provided with sand inlet (5).
2. the closed wire dust storm of one according to claim 1 corrodes simulation test device, it is characterized in that: described air channel is rectangular configuration.
3. the closed wire dust storm of one according to claim 1 and 2 corrodes simulation test device, it is characterized in that: the wind direction that described propeller fan produces is for flowing to clockwise.
4. the closed wire dust storm of one according to claim 3 corrodes simulation test device, it is characterized in that: described high speed corrodes simulation laboratory (2) means for two very close shafts flow blow air intake opening, and the two is positioned on a corresponding long side pipe road of rectangular duct; Described low speed corrodes simulation laboratory (1) and is positioned on another corresponding long side pipe road of rectangular duct.
5. the closed wire dust storm of one according to claim 4 corrodes simulation test device, it is characterized in that: corresponding two the minor face conduit cross-sectional areas of described rectangular duct are all greater than two corresponding long side pipe road cross-sectional areas of rectangular duct, described two minor face pipelines and two long side pipe roads are seamlessly transitted by toroidal pipeline (3).
6. the closed wire dust storm of one according to claim 5 corrodes simulation test device, it is characterized in that: the xsect of described erosion simulation laboratory is rectangle.
A kind of wire dust storm corrodes simulation experiment method, it is characterized in that comprising the following steps:
A, detect simulate area and to corrode in the relevant wind speed of wire, wind the parameters such as grains of sand concentration, sand particle size with dust storm;
B, according to the wind speed parameter detected in step a, closed wire dust storm is selected to corrode erosion simulation laboratory (low speed corrodes simulation laboratory or corrodes simulation laboratory at a high speed) suitable in simulation test device;
C, get experiment wire samples several, the circumference of wire samples is done several observation positions mark, the erosion simulated experiment several wire samples be fixed on selected in step b by fixture is indoor, and make the angle that the axis of wire samples and wind direction become different, to simulate the different angle of attack of dust storm;
D, unlatching propeller fan, by observing the data shown by the indoor wind speed measuring device of selected erosion simulated experiment, regulating shaft flow blow rotating speed, makes it identical with the wind speed parameter detected in step a; The grains of sand identical with the sand particle size parameter detected in step a are inserted by sand inlet, by observing grains of sand apparatus for measuring concentration parameter in wind, control grains of sand concentration in wind identical with grains of sand concentration parameter in the wind detected in step a, thus simulate the environment that dust storm corrodes wire;
E, determine the test period, within experimental period, to keep corroding in the wind speed of simulated experiment indoor, wind the parameters such as grains of sand concentration, sand particle size identical with the parameter detected in step a;
F, test period terminate, wire samples will be tested take out, utilize scanning electron microscope that the surface topography of several observation positions of wire circumference after dust storm particles erosion is taken into image, contrast the SEM image under the different angle of attack, diverse location, thus contrast the roughness after the erosion of different angle of attack lower wire sample circumference diverse location dust storm;
G, with the data recorded in step f, contrast the different angle of attack, different wind speed and the Changing Pattern around wire circumference diverse location upper conductor surfaceness, Matlab software is utilized to carry out matching the curve under above-mentioned three kinds of conditions, obtain the curve polynomial expression after matching, the contrast maximal value of roughness and the time of appearance thereof.
7. a kind of wire dust storm according to claim 6 corrodes simulation experiment method, it is characterized in that: after having carried out step f, utilize scanning electron microscope that the surface topography on wire samples circumference diverse location after dust storm particles erosion is taken into image, contrast the SEM image under the different angle of attack, diverse location, and by energy spectrogram, analyze the various element in wire samples surface comparatively before situation of change.
8. a kind of wire dust storm according to claim 6 corrodes simulation experiment method, and it is characterized in that: the wire samples described in step c is four, the axis of wire samples and wind direction are respectively 90 °, 60 °, 45 ° and 30 ° of angles.
9. a kind of wire dust storm according to claim 6 corrodes simulation experiment method, it is characterized in that: in described step c, and the circumference of described wire samples is done eight impartial observation position marks.
10. a kind of wire dust storm according to claim 6 corrodes simulation experiment method, it is characterized in that: the described step e determined test period is ten hours.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106644912A (en) * | 2017-01-12 | 2017-05-10 | 内蒙古农业大学 | Automatic and dust-free concrete sand wind deflation tester and test method thereof |
| CN110954470A (en) * | 2019-12-17 | 2020-04-03 | 中国海洋石油集团有限公司 | High-temperature high-pressure high-flow-rate wet gas environment corrosion simulation loop system |
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| CN205643104U (en) * | 2016-02-01 | 2016-10-12 | 华北电力大学（保定） | Closed wire sand blown by wind corrodes analogue test device |
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| CN203433701U (en) * | 2013-04-03 | 2014-02-12 | 华北电力大学（保定） | Closed-type conductor erosion simulation device |
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| CN106644912A (en) * | 2017-01-12 | 2017-05-10 | 内蒙古农业大学 | Automatic and dust-free concrete sand wind deflation tester and test method thereof |
| CN110954470A (en) * | 2019-12-17 | 2020-04-03 | 中国海洋石油集团有限公司 | High-temperature high-pressure high-flow-rate wet gas environment corrosion simulation loop system |
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