CN110244152A - It waves and quickly melts ice-coating test platform and its test method under windy conditions - Google Patents
It waves and quickly melts ice-coating test platform and its test method under windy conditions Download PDFInfo
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- CN110244152A CN110244152A CN201910616616.4A CN201910616616A CN110244152A CN 110244152 A CN110244152 A CN 110244152A CN 201910616616 A CN201910616616 A CN 201910616616A CN 110244152 A CN110244152 A CN 110244152A
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- ice
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- icing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/003—Environmental or reliability tests
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Abstract
The invention discloses waving quickly to melt ice-coating test platform under windy conditions, including artificial climate simulating chamber 1 and waves and melt ice-coating test platform 2；Wave that melt ice-coating test platform 2 include ice-coating test conducting wire, connecting cable, connection conductor, up-flow and measuring system, pressure regulator；Pressure regulator input termination AC power source, output voltage regulator connects up-flow and measuring system input terminal, up-flow and measuring system output end connect conductor input terminal in succession, connection two output ends of conductor are separately connected two connecting cable input terminals, and two connecting cable output ends connect respectively melts ice-coating test wire input end and output end；It connects conductor, two connecting cables and ice-coating test conducting wire and forms a closed circuit；Partial ice-coating test conducting wire is placed in artificial climate simulating chamber 1.This test platform of the present invention and test method can determine in the ice melting current for waving windy conditions lower wire, for the condition that winter conducting wire strong wind freezes, provide technological guidance, reduce the anti-probability given birth to of disaster.
Description
Technical field
The present invention relates to electrical engineering technical fields, and in particular to one kind waves quick ice-melt test platform under windy conditions
And its test method.
Background technique
Because icing easily occurs in sleet and snow ice weather, icing transmission line of electricity easily occurs Transmission Line in Winter under wind effect
It waves.If the condition of line oscillation excitation be in continual and steady state, waving section and waving the time can be more than 72 hours, grow
Time, high-intensitive persistently waving are to cause route that the main reason for being badly damaged on a large scale occurs.It waves and gently then causes route
Tripping, it is heavy then may cause broken string, the serious consequences such as tower.
The three elements for exciting conductor galloping are wire icing, wind excitation, line construction and parameter.Existing anti-dance measure is main
By inhibiting wind excitation, change conducting wire mechanical characteristic is waved to administer, and does not consider that destroy icing excitation waves to eliminate.Pass through
Ice-melt measure is taken in time to route is waved, and is destroyed the light ice excitation condition of line oscillation, be can achieve and actively eliminate route dance
Dynamic purpose, avoids power equipment from damaging.Traditional ice melting current characteristic is mainly for low wind speed, repetition ice condition, and the dance that disappears melts
The selection of ice electric current should guarantee that strong wind bad weather condition lower wire icing can melt rapidly, prevent electric current is excessive to cause again
Conducting wire overheat and ice-shedding accident need to develop to wave and quickly melt ice-coating test platform under windy conditions, specially carry out strong wind
Ice melting current characteristic research under the conditions of fast, light icing waves ice melting current to choose suitably to disappear.Conducting wire needs special when waving
The icing of shape, high to ice-coating test Platform Requirements, under windy conditions, the design that conductor galloping quickly melts ice-coating test platform is deposited
In following difficult point: problem 1 melts that ice-coating test Platform Designing difficulty is big, and existing conducting wire ice melting current characteristic discloses under windy conditions
Low wind speed (wind speed < 10m/s) repeats under ice (ice covering thickness > 10mm) meteorological condition, and ice-melt, which disappears, waves electric current dynamic characteristic and grind
When studying carefully, it is desirable that wind speed is big (wind speed > 10m/s), and wire icing is the eccentric icing (icing such as frivolous, fine and close crescent or D-shaped
Thickness < 10mm), the thin ice difficulty for forming special shape in conductive line surfaces under windy conditions is very big, quickly melts to conductor galloping and covers
The construction requirements of ice test platform are high.Problem 2, test platform ice melting current characteristic research is required under windy conditions it is high, due to
Wind speed is big, and icing is thin, and external condition influences conducting wire heat dissipation greatly, to easily lead to the distortion of ice melting current dynamic characteristic test result, right
Test platform require have wave conducting wire ice-melt dynamic characteristic test design propose rigors.
Therefore, for ice-melt feature under windy conditions of waving, there is an urgent need to carry out to wave quickly to melt icing under windy conditions
Test platform structural research provides quickly to melt ice-coating test Platform Designing under transmission line galloping windy conditions with final development
Guidance, effectively to solve the problems, such as transmission line galloping.
Summary of the invention
In view of the deficiencies of the prior art, it is waved the object of the present invention is to provide one kind and quickly melts ice-coating test under windy conditions
Platform and its test method meet the ice melting current characteristic research under the conditions of big wind speed, light icing.
Of the invention this wave quickly melts ice-coating test platform under windy conditions, including artificial climate simulating chamber 1 and waves
Melt ice-coating test platform 2；Wave melt ice-coating test platform 2 include ice-coating test conducting wire, connecting cable, connection conductor, up-flow
And measuring system, pressure regulator；Pressure regulator input termination AC power source, output voltage regulator connect up-flow and measuring system input terminal,
Up-flow and measuring system output end connect that conductor input terminal, to be separately connected two connecting cables defeated for connection two output ends of conductor in succession
Enter end, two connecting cable output ends connect respectively melts ice-coating test wire input end and output end；Connect conductor, two connection electricity
Cable and ice-coating test conducting wire form a closed circuit；Partial ice-coating test conducting wire is placed in artificial climate simulating chamber 1.
The artificial climate simulating chamber 1 includes chamber body, precipitation system, cooling system, air feed system, conducting wire placement
Frame；The conducting wire placement is placed in chamber body, and precipitation system is installed at the top of chamber body, and precipitation mouth is located at conducting wire rack
Top；Air feed system and cooling system are installed on the side wall of chamber body, and the air outlet of air feed system answers face conducting wire rack；
The chamber body is to offer several holes, can hold conducting wire and pass through, and conducting wire passes through hole, is placed on conducting wire rack.
Described to wave that melt ice-coating test platform 2 further include several wire insulation folders, wire insulation folder is for fixing
It is connected and connecting cable and melts ice-coating test conducting wire.
The height of the conducting wire rack is 3m；The test portion length of ice-coating test conducting wire should be greater than 5m.
Described waves the test method for quickly melting ice-coating test platform under windy conditions, comprising the following steps:
1) rule of thumb formula calculate conducting wire certain wind speed and at a temperature of preliminary icing critical electric current value Ic；
2) it takes after installing platform, connects test loop, rainfall, wind speed and the temperature of artificial climate simulating chamber are then set
Degree；
3) power turn-on switchs, and call through test ring current is evenly flowed up by pressure regulator, until rectifier output electricity
Stream is IcWhen, stop up-flow；After specific time, observation conducting wire whether icing, then by adjusting size of current repeatedly, directly
To conducting wire between icing critical point, electric current at this time is icing critical electric current value Im；
4) according to the above method, the icing critical electric current value I of different conductor under different condition is measuredm。
In the step 1), empirical equation are as follows:
In formula: IcFor preliminary icing critical current；R0For the resistance of temperature unit length conducting wire at 0 DEG C；D is that conducting wire is straight
Diameter；V is wind speed；t1Conductor temperature (guarantees the non-icing temperature of conducting wire, generally takes t1=2 DEG C)；t2External environment temperature when to freeze
Degree；εiFor radiation coefficient.
In the step 2), 1~5mm/h of rainfall, precipitation height answers > 5m, and wind speed is 12~20mm/s, and temperature is -3
~-5 DEG C.
In the step 3), specific time is 15~20min.
In the step 3), size of current is adjusted repeatedly, specifically includes the following steps: passing through tune if icing
Depressor makes the electric current for flowing through test lead increase 10%；If making the electricity for flowing through test lead by pressure regulator without icing
Stream reduces 10%；Electric current is increased or reduced until opposite with initial situation according to 10% always；It, will then according to aforesaid operations
It is 5% that electric current, which increases or reduces proportion adjustment,；2.5% is increased or reduced followed by according to aforesaid operations, and according to electric current；Then
1% is increased or reduced according to aforesaid operations, and according to icing situation, until to be in icing critical point critical to get icing for conducting wire
Current value Im；If just adjusting to conducting wire when adjusting size of current and being in icing critical point, then without carrying out subsequent ratio
The adjusting of example.
Beneficial effects of the present invention: 1) present invention wave quickly melt ice-coating test platform under windy conditions can be by artificial gas
The rainfall of simulating chamber analog, controlled wind speed and temperature are waited, humidity, rainfall, wind speed can also be controlled in the case where not rainfall
It is mainly realized by the operation of manual system and equipment with controlling for analog quantitys such as temperature, conducting wire when waving can be met
The bias icing such as frivolous, fine and close crescent or D-shaped (ice covering thickness < 10mm) requirement；2) up-flow in the present invention and measurement system
The achievable ice melting current 0-3000A that unites continuously is exported, and meets the quick ice-melt requirement of ice coating wire under the conditions of strong wind is waved；Melt icing
Test platform can realize quick ice melting current characteristic test under windy conditions, meet ice-melt and eliminate galloping test requirement；3) this hair
Bright this test platform and test method can determine in the ice melting current for waving windy conditions lower wire, be winter conducting wire strong wind knot
The condition of ice provides technological guidance, reduces the anti-probability given birth to of disaster.
Detailed description of the invention
The structural schematic diagram for quickly melting ice-coating test platform under windy conditions is waved in Fig. 1 embodiment 1.
Test schematic diagram in Fig. 2 embodiment 2；
Wherein: 1- artificial climate simulating chamber artificial climate simulating chamber, 11- include chamber body, 12- precipitation system, 13- cooling
System, 14- air feed system, 15- conducting wire rack, 16- hole, 17-；
It waves and melts ice-coating test platform 2；21- ice-coating test conducting wire, 22- wire insulation clamp, 23- connecting cable, 24- connection
Conductor, 25- up-flow and measuring system, 26- pressure regulator.
Specific embodiment
Embodiment 1
It waves that quickly to melt ice-coating test platform under windy conditions include 2 parts, artificial climate simulating chamber 1 and waves to melt and cover
Ice test platform 2；Artificial climate simulating chamber 1 includes chamber body 11, precipitation system 12, cooling system 13, air feed system 14, conducting wire
Rack 15, hole 16 and door 17；The chamber body 11 is square, and precipitation system 12 is installed on the top of chamber body 11；Cooling system
13 are installed on the side wall on 17 opposite of door；Air feed system 14 is installed on the lower section of cooling system 13；Conducting wire rack 15 is placed in chamber body
It is interior, it should be placed in the underface of precipitation system 12, and the air outlet of air feed system 14 should be right against conducting wire rack 15；It is removing
Hole 16 is opened up on any side wall of 17 sides of door, numbers of hole at least two, hole should not be too big, should be greater than 21 diameter of conducting wire
5~10%.
It is described to wave that melt ice-coating test platform 2 include ice-coating test conducting wire 21, wire insulation clamp 22, connecting cable 23
Two, connection conductor 24 (there are two output port), up-flow and measuring system 25, pressure regulator 26；The input termination of pressure regulator 26 is handed over
Galvanic electricity source, output voltage regulator connect 25 input terminal of up-flow and measuring system, and up-flow and 25 output end of measuring system connect conductor in succession
24 input terminals, connection two output ends of conductor are separately connected two 24 input terminals of connecting cable, two connecting cable output ends point
It does not connect and melts ice-coating test wire input end and output end；It connects conductor, two connecting cables and ice-coating test conducting wire and forms one
Closed circuit；Ice-coating test conducting wire 21 and the junction of connecting cable are fixed using wire insulation clamp 22, using described
Conducting wire 21 is fixed on conducting wire rack 15 by passing through hole 16.
Precipitation system 11 uses the XDJSXT/210 type precipitation system of Hu'nan Xiangdian Trial Research Technology Co., Ltd., cooling system
The unite JWSYS-30 type cooling system of 12 Hu'nan Xiangdian Trial Research Technology Co., Ltd., air feed system 13 is tried using Hunan Province Hunan electricity
It grinds Technology Co., Ltd. XDGFSYS/20 type air feed system, melt ice-coating test conducting wire 21 using commercially available LGJ-240 or LGJ-630
Type conducting wire, wire insulation folder 22 use commercially available XDJY/2 type insulating clamp, the commercially available YJJ-180/300 type of connecting cable 23
Cable, connection conductor 24 adopt commercially available LJTP-100 type conductor, up-flow and measuring system 25 and use commercially available XDSLSY10/
2000A type up-flow and measuring system, pressure regulator 26 use commercially available TYQ-10/400V type pressure regulator.
Embodiment 2
It is described that test method under windy conditions, test schematic diagram, such as Fig. 2 institute are waved using the test of above-mentioned experiment porch
Show: the following steps are included:
1) rule of thumb formula calculates preliminary icing critical electric current value of the conducting wire in the case where wind speed is 14m/s and temperature is -3 DEG C
Ic
IcFor preliminary icing critical current；R0For the resistance of temperature unit length conducting wire at 0 DEG C；D is diameter of wire；V is
Wind speed；t1Conductor temperature (guarantees the non-icing temperature of conducting wire, generally takes t1=2 DEG C)；t2Ambient temperature when to freeze；εi
For radiation coefficient.Ice-coating test conducting wire use LGJ-630, obtain the wind speed and at a temperature of, preliminary icing critical electric current value IcFor
1880.77A。
2) it takes after installing platform, connects test loop, rainfall 3mm/h, the wind of artificial climate simulating chamber are then set
Fast 12mm/s and -3 DEG C of temperature；Ice-coating test conductor length is 5m (conductor length being fixed on conducting wire rack is 5m),
The height of conducting wire supporter is 3m, and precipitation height is 6m.
3) power turn-on switchs, call through test ring current, and slowly evenly being flowed up by pressure regulator to electric current is IcWhen,
Stop up-flow；There is fine and close crescent ice to generate after 15min, on conducting wire；At the uniform velocity up-flow to electric current is 2068.85A, is passed through
After 15min, frivolous crescent ice on conducting wire；Continuing at the uniform velocity up-flow to electric current is 2275.73A, after 15min, ice on conducting wire
Dissolution, and ice is not carried out；Then at the uniform velocity reducing electric current is 2161.95A, after 15min, frivolous crescent ice on conducting wire；It connects again
At the uniform velocity up-flow to electric current be 2215.99A ice is not carried out on conducting wire after 15min；Then at the uniform velocity reducing electric current is
2193.83A, after 15min, conducting wire between carry out ice critical point (specific phenomenon be conducting wire on partial portion have thin ice once in a while,
But crossing 1~2min can melt again), the electric current obtained at this time is the icing critical current I waved under windy conditionsm。
LGJ-630 type conducting wire is measured when wind speed is 14m/s, temperature is -3 DEG C, rainfall is 3mm/h through the above method
Icing critical current ImFor 2193.83A.
Claims (8)
1. one kind, which is waved, quickly melts ice-coating test platform under windy conditions, which is characterized in that including artificial climate simulating chamber and dance
It is dynamic to melt ice-coating test platform；Wave melt ice-coating test platform include melt ice-coating test conducting wire, connecting cable, connection conductor, rise
Stream and measuring system, pressure regulator；Pressure regulator input termination AC power source, output voltage regulator connect up-flow and measuring system input
End, up-flow and measuring system output end connect conductor input terminal in succession, two output ends of connection conductor are separately connected two connections
Cable input terminal, two connecting cable output ends connect respectively melts ice-coating test wire input end and output end；Connect conductor, two
Connecting cable and ice-coating test conducting wire form a closed circuit；Partial ice-coating test conducting wire is placed in artificial climate simulating chamber 1
In.
2. quickly melting ice-coating test platform under dynamic windy conditions according to claim 1, which is characterized in that described is artificial
Climate and weathering cabinet 1 includes chamber body, precipitation system, cooling system, air feed system, conducting wire rack；The precipitation system
It is installed at the top of chamber body, precipitation mouth is located at the top of conducting wire rack；Air feed system and cooling system are installed on the side of chamber body
On wall, the air outlet of air feed system answers face conducting wire rack；The chamber body is to offer several holes, can hold conducting wire and wear
It crosses, conducting wire passes through hole, is placed on conducting wire rack.
3. quickly melting ice-coating test platform under dynamic windy conditions according to claim 1, which is characterized in that described waves
Melting ice-coating test platform 2 further includes several wire insulation folders, and wire insulation folder is covered for the connecting cable and melting of being fixedly linked
Ice test lead.
4. the test method for quickly melting ice-coating test platform under windy conditions is waved according to claims 1 to 3, including with
Lower step:
1) rule of thumb formula calculate conducting wire certain wind speed and at a temperature of preliminary icing critical electric current value Ic；
2) it takes after installing platform, connects test loop, rainfall, wind speed and the temperature of artificial climate simulating chamber are then set；
3) power turn-on switchs, and call through test ring current is slowly evenly flowed up by pressure regulator, until rectifier output electricity
Stream is IcWhen, stop up-flow；After specific time, observation conducting wire whether icing, then by adjusting size of current repeatedly, directly
To conducting wire between icing critical point, electric current at this time is icing critical electric current value Im；
4) according to the above method, the icing critical electric current value I of different conductor under different condition is measuredm。
5. according to claim 4 wave the test method for quickly melting ice-coating test platform under windy conditions, feature exists
In, in the step 1), empirical equation are as follows:
In formula: IcFor preliminary icing critical current；R0For the resistance of temperature unit length conducting wire at 0 DEG C；D is diameter of wire；v
For wind speed；t1Conductor temperature (guarantees the non-icing temperature of conducting wire, generally takes t1=2 DEG C)；t2Ambient temperature when to freeze；
εiFor radiation coefficient.
6. according to claim 4 wave the test method for quickly melting ice-coating test platform under windy conditions, feature exists
In in the step 2), 1~5mm/h of rainfall, wind speed is 12~20m/s, and temperature is -3~-5 DEG C.
7. according to claim 4 wave the test method for quickly melting ice-coating test platform under windy conditions, feature exists
In in the step 3), specific time is 15~20min.
8. waving the test method for quickly melting ice-coating test platform under windy conditions, feature according to claim 4 or 7
It is, in the step 3), adjusts size of current repeatedly, specifically includes the following steps: passes through pressure regulator if icing
The electric current for flowing through test lead is set to increase 10%；If subtracting the electric current for flowing through test lead by pressure regulator without icing
It is small by 10%；Electric current is increased or reduced until opposite with initial situation according to 10% always；Then according to aforesaid operations, by electric current
Increasing or reducing proportion adjustment is 5%；2.5% is increased or reduced followed by according to aforesaid operations, and according to electric current；Then basis
Aforesaid operations, and 1% is increased or reduced according to icing situation, until conducting wire is in icing critical point to get icing critical current
Value Im；If just adjusting to conducting wire when adjusting size of current and being in icing critical point, then without carrying out subsequent ratio
It adjusts.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910616616.4A CN110244152A (en) | 2019-07-09 | 2019-07-09 | It waves and quickly melts ice-coating test platform and its test method under windy conditions |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910616616.4A CN110244152A (en) | 2019-07-09 | 2019-07-09 | It waves and quickly melts ice-coating test platform and its test method under windy conditions |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111074850A (en) * | 2020-01-02 | 2020-04-28 | 天津城建大学 | Anti-icing device and method for yacht wharf in low-temperature environment |
| CN111983349A (en) * | 2020-08-10 | 2020-11-24 | 国网湖南省电力有限公司 | Natural environment simulated ice melting and dancing elimination test method and system for power transmission line |
-
2019
- 2019-07-09 CN CN201910616616.4A patent/CN110244152A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111074850A (en) * | 2020-01-02 | 2020-04-28 | 天津城建大学 | Anti-icing device and method for yacht wharf in low-temperature environment |
| CN111983349A (en) * | 2020-08-10 | 2020-11-24 | 国网湖南省电力有限公司 | Natural environment simulated ice melting and dancing elimination test method and system for power transmission line |
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Application publication date: 20190917 |