CN105911375A - Test method of icing critical current characteristics of distribution line - Google Patents

Test method of icing critical current characteristics of distribution line Download PDF

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Publication number
CN105911375A
CN105911375A CN201610163966.6A CN201610163966A CN105911375A CN 105911375 A CN105911375 A CN 105911375A CN 201610163966 A CN201610163966 A CN 201610163966A CN 105911375 A CN105911375 A CN 105911375A
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China
Prior art keywords
icing
test
distribution line
critical current
current
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CN201610163966.6A
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CN105911375B (en
Inventor
安义
朱远
王华云
谭艳军
郑蜀江
蔡木良
潘建兵
李博江
刘蓓
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Jiangxi Electric Power Co Ltd
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Jiangxi Electric Power Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02GINSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/02Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables

Abstract

The invention discloses a test method of icing critical current characteristics of a distribution line, for obtaining the icing critical current characteristics of the distribution line through simulating an onsite environment. According to the method, an artificial environment lab is employed for simulating the onsite environment, a high-current generator is placed in an artificial environment climate chamber, flows are rapidly raised to set currents, icing critical currents of a test lead wire under the conditions of given environment parameters and current values are observed, and finally, the icing critical current characteristics of the distribution line under the condition of different environment parameters and lead wire models are obtained. The method is simple, can quietly accurately obtain the icing critical current characteristics of the distribution line and has an important reference value for antifreeze ice-melting work of the distribution line.

Description

A kind of test method of distribution line icing critical current properties
Technical field
The present invention relates to the test method of a kind of distribution line icing critical current properties, belong to power distribution network test skill Art field.
Background technology
Distribution line quantity is many, widely distributed, and major part is high and cold all in the mima type microrelief microclimate of bad environments Mountain area, is easily affected by sleet and snow ice, and icing situation is extremely serious, and distribution line is responsible for directly Connecing to the important task of customer power supply, once there is icing density in distribution line, will have a strong impact on the normal raw of the people Produce and household electricity.By grasping distribution line icing critical current properties, can effectively prevent distribution line Freezing disaster, formulates distribution line freezing preventing and ice melting scheme in time, reduces the freezing disaster damage to distribution line.
At present, distribution line icing critical current properties is typically calculated by Correlation, with reality Situation difference in border is relatively big, often brings erroneous judgement to repair personnel, thus misses distribution line freezing preventing and ice melting The good time, and it is unrealistic to grasp distribution line icing critical current properties by in-site measurement, therefore having must Distribution line icing critical current properties is obtained by simulated field environment.
Summary of the invention
It is an object of the invention to, deficiency distribution line icing critical current properties determined for prior art, Propose the test method of a kind of distribution line icing critical current properties, carry out targetedly for power supply department Distribution line anti-icing ice-melt work provides foundation.
The technical scheme is that, the test method of a kind of distribution line icing critical current properties, described Method obtains distribution line icing critical current properties by simulated field environment, uses artificial environment test Room simulated field environment, is placed in artificial environment climatic chamber by current lifting device, quickly flows up to set electric current, observes Test lead icing critical current under the conditions of given ambient parameter and current value, finally obtains varying environment The icing critical current properties of the distribution line under the conditions of parameter, wire type.
Specifically comprising the following steps that of the inventive method
(1) determine environment weather parameter wind speed, rainfall, temperature, apply phjytotron simulation test environment;
(2) an icing critical current reference value is mentioned as the following formula, the up-flow reference as during test:
I b = 1 R 0 [ 0.143 ϵ i d + 0.82 ( v d ) 0.75 ] ( t 1 - t 2 )
Wherein, IbFor critical icing electric current (A), R0For temperature resistance of agriculture distribution line wire when 0 DEG C (Ω/m), d is diameter of wire (cm), v and t2It is respectively ambient wind velocity (m/s) and temperature (DEG C), t1For protecting The card non-icing temperature of wire (DEG C), εiFor radiation coefficient;
(3) put up test platform, connect test loop, check that wiring is correct;
(4) power turn-on switch, call through test ring current, flowed up the most evenly by pressure regulator, directly It is one to liter rheology output electric current and compares IbDuring slightly smaller numerical value, stop up-flow;Whether wire is observed after 20min Icing, if icing, then makes the electric current flowing through test lead increase 10% by pressure regulator;If not yet There is icing, then make the electric current flowing through test lead reduce 10% by pressure regulator, until obtaining corresponding meteorological bar Under part till specific model wire icing critical current.
The invention has the beneficial effects as follows, the inventive method is simple, can accurately obtain distribution line icing and face Boundary's current characteristics, has important references to the work of distribution line freezing preventing and ice melting and is worth.
The inventive method is applicable to power distribution network O&M, ice damage repairing.
Accompanying drawing explanation
Fig. 1 is that distribution line icing critical current tests schematic diagram.
Detailed description of the invention
The present invention is embodied as carrying out, as shown in Figure 1 under simulation test environment in the controlled environment chamber.
Test platform includes pressure regulator, rising current transformer, test lead.Pressure regulator input connects 220 volts Alternating current power supply;Output voltage regulator connects the input of rising current transformer, and the outfan of rising current transformer passes through Cable joint test wire.Phjytotron energy simulation test environment, indoor are provided with rainfall facility and blower fan, Can simulating chamber external environment.
The detailed description of the invention of distribution line icing critical current test is as follows:
(1) determine environment weather parameter wind speed, rainfall, temperature, apply phjytotron simulation test environment.
(2) in order to obtain test lead icing critical electric current value I under difficult environmental conditionsb, with reference to relevant Empirical equation is calculated a numerical value, to reduce blindness during up-flow.
I b = 1 R 0 [ 0.143 ϵ i d + 0.82 ( v d ) 0.75 ] ( t 1 - t 2 )
In above formula, IbFor critical icing electric current (A), R0For temperature resistance of agriculture distribution line wire when 0 DEG C (Ω/m), d is diameter of wire (cm), v and t2It is respectively ambient wind velocity (m/s) and temperature (DEG C), t1For protecting The card non-icing temperature of wire (DEG C), εiFor radiation coefficient.
(3) put up test platform, connect test loop, check that wiring is correct.
(4) power turn-on switch, call through test ring current, flowed up the most evenly by pressure regulator, directly It is one to liter rheology output electric current and compares IbDuring slightly smaller numerical value, stop up-flow.Whether wire is observed after 20min Icing, if icing, then makes the electric current flowing through test lead increase 10% by pressure regulator;If not yet There is icing, then make the electric current flowing through test lead reduce 10% by pressure regulator, until obtaining corresponding meteorological bar Under part till specific model wire icing critical current.
(5) wire icing situation is taken pictures, the numbering storage of photo time by date, record temperature, wet Degree, wind speed, wire type, icing critical current.

Claims (5)

1. the test method of a distribution line icing critical current properties, it is characterised in that described method is led to Cross simulated field environment to obtain distribution line icing critical current properties, use field in artificial environment laboratory simulation Site environment, is placed in artificial environment climatic chamber by current lifting device, quickly flows up to set electric current, and viewing test is led Line icing critical current under the conditions of given ambient parameter and current value, finally obtain varying environment parameter, The icing critical current properties of the distribution line under the conditions of wire type.
The most according to claim 1, the test method of distribution line icing critical current properties, its feature exists In, described distribution icing critical current refers to the minimum electricity made under certain environmental conditions needed for wire not icing Stream.
3. according to the test method of distribution line icing critical current properties described in claim 1 and right 2, It is characterized in that, described setting electric current determines as the following formula:
I b = 1 R 0 [ 0.143 ϵ i d + 0.82 ( v d ) 0.75 ] ( t 1 - t 2 )
Wherein, IbFor critical icing electric current (A), R0For temperature resistance of agriculture distribution line wire when 0 DEG C (Ω/m), d is diameter of wire (cm), v and t2It is respectively ambient wind velocity (m/s) and temperature (DEG C), t1For protecting The card non-icing temperature of wire (DEG C), εiFor radiation coefficient.
4. according to the test method of distribution line icing critical current properties described in claim 1 and right 2, It is characterized in that, described method can obtain under various circumstances, the icing critical current of different conductor model Characteristic.
The most according to claim 1, the test method of distribution line icing critical current properties, its feature exists In, the step of described method is as follows:
(1) determine environment weather parameter wind speed, rainfall, temperature, apply phjytotron simulation test environment;
(2) an icing critical current reference value is mentioned as the following formula, the setting electric current as during test:
I b = 1 R 0 [ 0.143 ϵ i d + 0.82 ( v d ) 0.75 ] ( t 1 - t 2 )
(3) put up test platform, connect test loop, check that wiring is correct;
(4) power turn-on switch, call through test ring current, flowed up the most evenly by pressure regulator, directly It is one to liter rheology output electric current and compares IbDuring slightly smaller numerical value, stop up-flow;Whether wire is observed after 20min Icing, if icing, then makes the electric current flowing through test lead increase 10% by pressure regulator;If not yet There is icing, then make the electric current flowing through test lead reduce 10% by pressure regulator, until obtaining corresponding meteorological bar Under part till specific model wire icing critical current.
CN201610163966.6A 2016-03-22 2016-03-22 A kind of test method of distribution line icing critical current properties Active CN105911375B (en)

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Publication number Priority date Publication date Assignee Title
CN106877265A (en) * 2017-03-07 2017-06-20 贵州电网有限责任公司电力科学研究院 A kind of de-icing method and device that DC current is passed through to icing circuit
CN107134740A (en) * 2017-06-29 2017-09-05 国网四川省电力公司电力科学研究院 The anti-icing method and system of extra high voltage direct current transmission line on-load
CZ308758B6 (en) * 2020-03-11 2021-04-28 Ĺ KODA AUTO a.s. Method of realizing a simulated thermal load for measuring a data connection and device for this method

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CN104567983A (en) * 2015-01-08 2015-04-29 国家电网公司 Phytotron de-icing test platform for extra-high voltage divided conductors
CN105181003A (en) * 2015-09-30 2015-12-23 国家电网公司 Strong-circulation energy-saving high current system for ice-melting tests of ultra-high voltage line

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US20070156358A1 (en) * 2005-12-30 2007-07-05 Abb Technology Ltd. Method and device for fault location on three terminal power line
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CN104567983A (en) * 2015-01-08 2015-04-29 国家电网公司 Phytotron de-icing test platform for extra-high voltage divided conductors
CN105181003A (en) * 2015-09-30 2015-12-23 国家电网公司 Strong-circulation energy-saving high current system for ice-melting tests of ultra-high voltage line

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106877265A (en) * 2017-03-07 2017-06-20 贵州电网有限责任公司电力科学研究院 A kind of de-icing method and device that DC current is passed through to icing circuit
CN107134740A (en) * 2017-06-29 2017-09-05 国网四川省电力公司电力科学研究院 The anti-icing method and system of extra high voltage direct current transmission line on-load
CZ308758B6 (en) * 2020-03-11 2021-04-28 Ĺ KODA AUTO a.s. Method of realizing a simulated thermal load for measuring a data connection and device for this method

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