CN102735286A - Manual icing testing system based on natural condition and testing method of the manual icing testing system - Google Patents
Manual icing testing system based on natural condition and testing method of the manual icing testing system Download PDFInfo
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- CN102735286A CN102735286A CN2012102353403A CN201210235340A CN102735286A CN 102735286 A CN102735286 A CN 102735286A CN 2012102353403 A CN2012102353403 A CN 2012102353403A CN 201210235340 A CN201210235340 A CN 201210235340A CN 102735286 A CN102735286 A CN 102735286A
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Abstract
The invention discloses a manual icing testing system based on natural condition. The manual icing testing system comprises a measuring system, wherein the measuring system comprises a testing field, a wire rod system and a spraying system; the wire rod system is erected on the testing field; the wire rod system comprises concrete rods arranged in parallel; two layers of leads in parallel are erected up and down are erected on each row of concrete rods; two leads are arranged at each layer; the leads and the concrete rods are connected through insulators; the spraying system comprises a spraying pipeline; the spraying pipeline is parallel to the leads at the upper layer; and the spraying pipeline is provided with nozzles facing downwards. With the adoption of the manual icing testing system based on natural condition, related by the invention, the natural environment condition can be utilized well; the advantages of the natural condition and the natural environment condition can be combined; the defect that testing is carried out only depending on the natural condition is made up; the manual interference is carried out pointedly; the testing time (period) is prolonged; and ideal parameters of the testing environment can be obtained.
Description
Technical field
The present invention relates to icing test field, especially relate to a kind of ice-coated test system.
Background technology
The fault that powerline ice-covering causes is one of serious disaster of domestic and international electric system always, and the icing disaster does not have solution completely so far.While circuit icing is prone to cause to be waved, thereby causes even more serious disaster.The research of circuit icing is all significant to power grid security and reliability service and even national economy etc.Artificial ice-coated test system based on natural conditions is that natural conditions are combined with manual intervention, remedies both deficiencies simultaneously, the pilot system platform of simulating natural condition (meteorological conditions such as sleet, snow) research experiment.
Present existing icing testing station is a kind of to be to only depend on physical environment to carry out the icing test, and a kind of is only to utilize artificial auxiliary making an experiment.
Wire icing of transmission line depends on the factors such as speed that lead ambient air temperature, certain ambient humidity, on-the-spot wind speed and direction and rain (snow) fall.Ambient temperature is too high, humidity is low, wind direction is parallel with lead and the wind speed circuit icing that all is unfavorable for such as excessive.Wire icing needs the environment of low temperature and high humidity; This has at first increased the difficulty of test site addressing; And the probability that the microthermal climate of physical environment and high humidity environment occur simultaneously is very little, and the time shared in 1 year is short, and the time that can be used for testing is shorter; It is very passive to test, and is difficult to satisfy certain experimental study demand; Because natural environmental condition, meteorologic parameter is uncontrollable; Icing testing station based on physical environment build test circuit in the open in; The environment of treating low temperature and high humidity to make an experiment temporarily; Dependence to test condition is excessive, test condition can not be adjusted, change or change according to the demand of research, therefore is difficult to carry out replica test; To sum up, natural conditions icing testing station is excessive to the dependence of physical environment, has great limitation and uncontrollability.
A kind of in addition ice-coated test system in the controlled environment chamber or the people carry out in the jet chamber of building.Yet the scale of phytotron is generally very little, and inner space length and width and Gao Jun far can not simulate the scale of actual track within several meters scope; Its test condition leans on manual shift fully in addition, and wire icing is the phenomenon that forms under field conditions (factors), and artificial climate can not substitute the icing process of natural conditions lower wire fully; The cost of phytotron is very high, and one 4 meters square laboratory expenditures of construction are up to a million easily even millions of, and the more double rise of its cost of more massive laboratory has improved the financial cost and the burden of experimental study.
The 3rd, at present icing is measured mostly under ice coating wire only receives the condition of gravity and is carried out, and natural icing testing station adopts straight line shelves wire icing mostly; Phytotron is because dimensional space is little, and lead leans on insulator to support or suspension, only can realize the icing test of short distance off-line shelves in several meters scopes, and is very big with the ice coating state difference of actual track.Secondly, measuring system is carried out reading with the data presentation of gathering on instrument mostly, such test figure and non real-time, and imperfect.In addition, present business-like on-line monitoring instrument is mainly supplied power by solar storage battery, often occurs the situation of outage during test, causes its data acquisition that certain intermittence is arranged, and imperfect.
Summary of the invention
The object of the present invention is to provide a kind ofly, be convenient to carry out each item experimental studies such as the research of icing mechanism, the research of deicing de-icing technology, covering ice for insulator based on artificial ice-coated test system and test method thereof under the natural conditions.
Technical scheme of the present invention is:
A kind of artificial ice-coated test system based on natural conditions; Comprise measuring system, comprise testing field, line lever system and spraying system, said line lever system is erected on the testing field; Said line lever system comprises the concrete bar that is set up in parallel; Divide on every row concrete bar and set up two-layer parallel wire up and down, every layer conductor comprises two leads, is connected through insulator between lead and the concrete bar; Said spraying system comprises spray piping, and spray piping is parallel with topping wire, and said spray piping is provided with downward shower nozzle.
Online lever system periphery is arranged with brattice on the said testing field.
Said brattice and outermost concrete distance between tie rods are 2 ~ 4m.
Every row concrete bar is made up of 3 basic concrete bars.
Spacing is 20 ~ 25m between the adjacent two basic concrete bars.
Following layer conductor is 1.2m ~ 2.5m apart from ground, and topping wire is 2.5 ~ 4m apart from ground.
The fog horn degree that goes out of shower nozzle is 90o.
The spacing of said spray piping and topping wire in the vertical direction is 0.5 ~ 1.5m.
Said spray piping outerwrap one deck electric-heating belt.
The scalable particle size range of said shower nozzle is 10 μ m ~ 200 μ m.
Measuring system comprises meteorological sensor, pulling force sensor, obliquity sensor, data collecting card, said meteorological sensor, pulling force sensor, obliquity sensor all with the data acquisition card connection.
A kind of artificial ice-coating test method based on natural conditions,
The first step, the experiment with measuring temperature, temperature requires between-15 ℃ ~ 0 ℃ during test;
In second step, the adjusting of wind: when or angle parallel with lead was greater than 150o when wind direction, lead was difficult for icing, and the brattice around the testing field is closed, made in the testing field calmly basically, and spraying system carries out icing under windless condition tests; When walking the angular separation, footpath between 45o ~ 150o at wind direction and lead, wire icing is serious, should open brattice, the icing of spraying;
In the 3rd step, the adjusting of icing density: the size of the shower nozzle of adjusting spraying system is to regulate the particle diameter of spraying, and the pressure size of regulating spraying system then is to change the discharge of spraying system;
The 4th step; Measure the icing quality of lead: the ball-eye place that pulling force sensor and obliquity sensor is installed in strain insulator string; Replace ball-eye,, measure the icing quality of lead with the tension variation of lead behind pulling force sensor and the obliquity sensor measurement icing;
In the 5th step,, carry out data analysis according to measurement result.
Advantage of the present invention:
The first, its addressing only needs the weather of low temperature, adopts the environment of artificial spraying system simulation high humidity simultaneously, compares the icing testing field under the physical environment, has prolonged the test period greatly.
The second, go out mist (water) pressure through regulating spraying system, the size of ambient humidity and rainfall be can change, thereby the density of icing and the speed of freezing changed, greatly increased experimental study content and dirigibility.
The 3rd, buildable testing field scale is big, can carry out simulation test according to the true line road.Carry out icing test and measurement at straight line shelves and strain section simultaneously, the icing that adopts pulling force sensor to carry out the strain insulator circuit is measured, and simulates the actual track icing more truly.
The 4th, measuring system adopts the data collecting card image data, and with pulling force, obliquity sensor signal, signals such as wind speed, wind direction, environment temperature, humidity are transmitted through the fiber to the front end main frame, carry out data-switching, storage and calculating; Use 220V civil power uninterrupted power supply simultaneously, read mode with traditional table meter formula data presentation and manual work and compare, increased data continuously and integrality.
The 5th, compare phytotron, its cost is low, and lead is set up in the testing field vertical rod, and levelling of the land and monitoring system total expenses are less than 50% of one 4 meters square laboratory expenses.
The artificial ice-coated test system based under the natural conditions that the present invention relates to can utilize natural environmental condition well; Comprehensive both advantages; Remedy the deficiency of only leaning on natural condition test simultaneously; Carry out manual intervention targetedly, prolonged test period (cycle), obtain comparatively desirable experimental enviroment parameter.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the structural representation of insulator.
Embodiment
The present invention is applied to the ultra-high-tension power transmission line icing experimental study field of 110kV ~ 500kV scope.
Testing field of the present invention is positioned at the Jian Shan mountain top, Xinmi City, Henan Province at place, true type transmission line of electricity compbined test base, more than 800 meter of height above sea level, and this area's temperature on average is lower about 5 ℃ than Zhengzhou urban district.In the point mountain area 1 year nearly 6 months every day time have temperature to be lower than the subzero time period and winter time longer, have good low temperature resource.
As shown in Figure 1, the present invention includes testing field, line lever system, spraying system and measuring system.The line lever system is south-north direction, has 9 basic concrete bars 1, forms the rectangle of 50m * 4m, is divided into 3 row from the east orientation west, and every row are made up of 3 basic concrete bars 1, and column pitch is 2 meters.The lead suspension district at this 9 basic concrete bar, 1 formation testing field, forming area is the rectangle (can hang east, two parallel wires 2 in west on every basic concrete bar 1, spacing 1m between the adjacent wires 2) of 50m * 5m.
Spraying system comprises spray piping 3, water system and control system.Spray piping is supplied water by water system and pressure is provided, and control system is controlled water system.Water system is made up of water supply installation, pipeline, solenoid valve and nozzle.Spraying system adopts hydraulic atomized principle; With pressurizeing after the water filtration in the water cellar, and, form the fine liquid particles of many high-speed motions through high efficiency nozzle ejection back atomizing; Fine liquid particles is owing to the weight of self slowly descends slowly and lightly to lead; Regulate aquifer yield to the suitable size of spraying nozzle, the little water droplet of less atomizing slowly descends slowly and lightly, very near the rainwater under the natural conditions.Water droplet is atomized into the small particle diameter globule of 10 μ m ~ 200 μ m, and the form that nebulizes is sprayed onto the test lead 2 of pipeline below through spray piping 3.Spray piping 3 is parallel with topping wire 2, and for reaching the icing density of demand, spray piping is set according to the actual tests situation from the distance of lead, and spray piping 3 is 0.5 ~ 1.5m apart from the spacing of topping wire 2 in the native system, and present embodiment is got 0.5m.
Control device guarantees the normal operation of spraying system, and automatic control program is adopted in system's operation.Control device is installed in the switch board, system is in time sent open and close the instruction operation of spraying, and controls out fog density and speed through regulating hydraulic pressure.
Measuring system comprises meteorological sensor, pulling force sensor 6, obliquity sensor, data collecting card and video monitoring probe, meteorological sensor, pulling force sensor 6, obliquity sensor all with the data acquisition card connection.Measuring system can be carried out icing quality, thickness, temperature, wind speed and ambient humidity, the monitoring of video etc.Sensor installation on test circuit transfers on the front-end server through netting twine, monitors through the control platform.Meteorological sensor (containing humiture, wind speed parameter) and video monitoring probe is housed near the lead on the concrete bar 12.Measuring system adopts the data collecting card image data, and with pulling force, obliquity sensor signal, signals such as wind speed, wind direction, environment temperature, humidity are transmitted through the fiber to the front end main frame, carry out data-switching, storage and calculating; Use 220V civil power uninterrupted power supply simultaneously, read mode with traditional table meter formula data presentation and manual work and compare, increased data continuously and integrality.
Test temperature requires: test is being lower than 0 ℃, is higher than under subzero 15 ℃ as far as possible and carries out.Because when temperature was low, super-cooling waterdrop changed snow, ice crystal or hail into, is difficult for icing on lead.
9 basic concrete bar 1 peripheries of online lever system are with a circle brattice 5, and brattice 5 is high 4 meters, and the outermost concrete bar 1 of distance is that 2 ~ 4m (present embodiment is 3 meters) is far away.
The adjusting of wind: wind speed and direction can exert an influence to wire icing, if there is wind that water droplet is blowed to lead, quickens wire icing.When or angle parallel with lead was greater than 150o when wind direction, lead was difficult for icing, at this moment, brattice 5 closures around will be at the icing testing field, calm basically in this moment, spraying system carries out the icing test basically under windless condition; When wind direction and lead were walked the angular separation, footpath between 45o ~ 150 o, this moment, wire icing was serious, need open brattice 5, the icing of spraying again.
The adjusting of icing density: under certain wind friction velocity, icing density is relevant with the size and water outlet (mist) speed of water spray (mist).Spraying system is through regulating the size of shower nozzle 4, and the scalable particle size range is between 10 μ m ~ 200 μ m.The output pressure of controller is at 10kg ~ 40kg, and the size of regulating pressure changes the discharge of spraying system.
The measurement of test: install pulling force sensor 6 and obliquity sensor additional at strain section lead 2 two ends.As shown in Figure 2, insulator comprises strain insulator string 7, and strain insulator string 7 left ends are connected with capable link 8 of U and ball-eye 9 in turn.Pulling force sensor 6 and obliquity sensor are installed in ball-eye 9 places (like position A among Fig. 1) of strain insulator string, replace ball-eye 9 to install.The tension variation of lead behind the pulling force sensor 6 measurement icing, thus the wire icing quality obtained, be subzero 5 ℃ ~ 0 ℃ in temperature; The water smoke particle diameter is greater than 20 μ m; Wind speed forms glaze when big, its equivalent ice covering thickness h=m/ ρ/L-d (this computing formula is circle with the equivalence of icing cross section, and what calculate is equivalent ice covering thickness); Wherein m is the gross mass of lead and icing behind the icing, is measured by pulling force and obliquity sensor; ρ is an icing density, is taken as 0.9g/cm during glaze
3, L is the length of ice coating wire, d is a diameter of wire.Lower in temperature, the water smoke particle diameter is less than 20 μ m, and wind speed is hour formation rime, and this moment, density p was taken as 0.8g/cm
3
After built up according to above data at the testing field, certain was tested at subzero 8 ℃ of environment temperature, humidity 95%, wind speed 0.4m/s, and atomisation pressure is set in 35kg, spray angle 90o, 6 hours, icing maximum ga(u)ge 8mm.
Claims (10)
1. artificial ice-coated test system based on natural conditions; Comprise measuring system, it is characterized in that: comprise testing field, line lever system and spraying system, said line lever system is erected on the testing field; Said line lever system comprises the concrete bar that is set up in parallel; Divide on every row concrete bar and set up two-layer parallel wire up and down, every layer conductor comprises two leads, is connected through insulator between lead and the concrete bar; Said spraying system comprises spray piping, and spray piping is parallel with topping wire, and said spray piping is provided with downward shower nozzle.
2. artificial ice-coated test system according to claim 1 is characterized in that: online lever system periphery is arranged with brattice on the said testing field.
3. artificial ice-coated test system according to claim 2 is characterized in that: said brattice and outermost concrete distance between tie rods are 2 ~ 4m.
4. artificial ice-coated test system according to claim 1 and 2 is characterized in that: following layer conductor is 1.2m ~ 2.5m apart from ground, and topping wire is 2.5 ~ 4m apart from ground.
5. artificial ice-coated test system according to claim 1 and 2 is characterized in that: the fog horn degree that goes out of shower nozzle is 90o.
6. artificial ice-coated test system according to claim 1 and 2 is characterized in that: the spacing of said spray piping and topping wire in the vertical direction is 0.5 ~ 1.5m.
7. artificial ice-coated test system according to claim 1 and 2 is characterized in that: said spray piping outerwrap one deck electric-heating belt.
8. artificial ice-coated test system according to claim 1 and 2 is characterized in that: the scalable particle size range of said shower nozzle is 10 μ m ~ 200 μ m.
9. artificial ice-coated test system according to claim 1 and 2; It is characterized in that: measuring system comprises meteorological sensor, pulling force sensor, obliquity sensor, data collecting card, said meteorological sensor, pulling force sensor, obliquity sensor all with the data acquisition card connection.
10. artificial ice-coating test method based on natural conditions is characterized in that:
The first step, the experiment with measuring temperature, temperature requires between-15 ℃ ~ 0 ℃ during test;
In second step, the adjusting of wind: when or angle parallel with lead was greater than 150o when wind direction, lead was difficult for icing, and the brattice around the testing field is closed, made in the testing field calmly basically, and spraying system carries out icing under windless condition tests; When walking the angular separation, footpath between 45o ~ 150o at wind direction and lead, wire icing is serious, should open brattice, the icing of spraying;
In the 3rd step, the adjusting of icing density: the size of the shower nozzle of adjusting spraying system is to regulate the particle diameter of spraying, and the pressure size of regulating spraying system then is to change the discharge of spraying system;
The 4th step; Measure the icing quality of lead: the ball-eye place that pulling force sensor and obliquity sensor is installed in strain insulator string; Replace ball-eye,, measure the icing quality of lead with the tension variation of lead behind pulling force sensor and the obliquity sensor measurement icing;
In the 5th step,, carry out data analysis according to measurement result.
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Cited By (3)
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| CN103344864A (en) * | 2013-07-18 | 2013-10-09 | 国家电网公司 | Semi-natural-state conductor icing test platform |
| CN103344284A (en) * | 2013-07-24 | 2013-10-09 | 国家电网公司 | Test method for manual intervention of freezing rain in distribution network glaze feature region |
| CN105096720A (en) * | 2014-05-23 | 2015-11-25 | 国家电网公司 | Device for detecting influence on icing thickness because of diameter of wire, and detecting method thereof |
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Effective date of registration: 20121112 Address after: 450052 Songshan South Road, Henan, No. 85, No. Applicant after: Henan Electric Power Corporation Electric Power Science Research Institute Applicant after: State Grid Corporation of China Address before: 450008 Songshan South Road, Henan, No. 85, No. Applicant before: Henan Institute of Power Experiment |
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Application publication date: 20121017 |