CN102590665A - Method for testing ice melting current-time characteristics of leads of power transmission line - Google Patents
Method for testing ice melting current-time characteristics of leads of power transmission line Download PDFInfo
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- CN102590665A CN102590665A CN2012100272613A CN201210027261A CN102590665A CN 102590665 A CN102590665 A CN 102590665A CN 2012100272613 A CN2012100272613 A CN 2012100272613A CN 201210027261 A CN201210027261 A CN 201210027261A CN 102590665 A CN102590665 A CN 102590665A
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- 238000002844 melting Methods 0.000 title claims abstract description 53
- 230000008018 melting Effects 0.000 title claims abstract description 53
- 230000005540 biological transmission Effects 0.000 title claims abstract description 31
- 238000012360 testing method Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000010998 test method Methods 0.000 claims description 9
- 238000002474 experimental method Methods 0.000 claims description 8
- 238000007796 conventional method Methods 0.000 claims description 7
- 238000010257 thawing Methods 0.000 claims description 7
- 239000004020 conductor Substances 0.000 claims description 6
- 230000003278 mimic effect Effects 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 238000004088 simulation Methods 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 4
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 230000005611 electricity Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004870 electrical engineering Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
Abstract
The invention provides a method for testing ice melting current-time characteristics of leads of a power transmission line, which includes the following steps: (1) confirming lead types; (2) calculating ice melting current; (3) constructing a testing platform; (4) simulating lead ice coating; (5) simulating lead ice melting; (6) judging whether a test is finished; (7) adjusting ice melting current and repeating step (4)-(6); and (8) drawing ice melting current-time curves. The method has the advantages of 1) being simple and easy to operate; 2) being capable of providing instructions for obtaining of the ice melting current-time curves of the leads in various types; 3) being capable of obtaining the ice melting current-time curves of the leads in various types, and providing reference for site ice melting, preventing the leads from being damaged; and avoiding that the leads cannot melt ice layers; and 4) being capable of providing basis for parameter design of the ice melting device through the ice melting current-time curves of the leads obtained by the method.
Description
Technical field
The invention belongs to the electrical engineering technical field, relate in particular to a kind of ice melting current-time response test method of transmission line wire.
Background technology
The icing disaster is a kind of disaster of serious threat electric power netting safe running; In the southern area ice damage in 2008; A large amount of transmission lines of electricity has surpassed the ice covering thickness design load of circuit because of wire icing thickness, and ultra thick icing crushes iron tower or forgets about it, and electric power enterprise is suffered heavy losses.
At present, can reduce the powerline ice-covering casualty loss the most directly, effective method, be transmission line of electricity to be carried out exchange or DC ice melting work, icing is heated melt to come off, and then guarantees that tower, broken string accident do not take place down transmission line of electricity.Yet, implement to exchange or during DC ice melting, excessive if the ice melting current amount is chosen, can cause the lead heating to cause damage, as choose too small, again can not be with ice-out.Equally, long like the ice-melt selection of time under the ice melting current of equivalent, also can cause the undue heating of lead and cause damage, choose too shortly like the time, can not the icing of lead be melted.Therefore, choosing great ice melting current and ice-melt time how long, is problem demanding prompt solution of work about electric power person.
Summary of the invention
The technical matters that the present invention will solve is; The problem that can be used for instructing field technician's choose reasonable lead ice melting current size and ice-melt time length to present shortage; Design a kind of ice melting current-time response test method of transmission line wire; Carry out correlation test through this method, can find different model lead corresponding ice melting current value and ice-melt time, and can draw out corresponding lead ice melting current-time response curve.Thereby when making on-the-spot ice-melt, can find the specific ice melting current and the ice-melt time of transmission line wire easily, for the ice-melt work of transmission line of electricity provides guidance through the above-mentioned curve of inquiry.
Technical solution of the present invention is that the ice melting current of this a kind of transmission line wire that is provided-time response test method is to be following step:
(1), confirms wire type.Confirm the on-the-spot model of treating the ice-thawing electric transmission line lead, the lead of sampling same model;
(2), adjust ice melting current.According to the current density of step (1) lead that obtains, use conventional method to calculate lead ice melting current value.The interval of the current density of said lead is: sectional area is 240 square millimeters and following lead, and its current density value is 3 times of this sectional area of wire; Sectional area is 300～500 square millimeters a lead, and its current density value is 2.5 times of this sectional area of wire; Sectional area is 630 square millimeters and above lead, and its current density value is 2 times of this sectional area of wire;
(3), build test platform.Select one can simulate various weather environment conditions phytotron, in this chamber the device General Current current lifting device, then step (1) lead that obtains is placed this chamber and puts the General Current current lifting device with the chamber to be electrically connected;
(4), analog conducting wire icing.Use conventional method regulating step (3) the institute indoor weather environment condition of the artificial climate of selecting, make step (3) transmission line wire that obtains simulate icing, ice covering thickness reaches setting value;
(5), analog conducting wire ice-melt.Setting up procedure (2) the electric current current lifting device of putting, obtaining lead ice melting current value according to step (2) is I1, applies electric current to lead, makes the lead of putting become the mimic transmission line line conductor.When treating that ice-melt begins, the ice-melt start time is placed on record, when ice-melt is accomplished when the transmission line simulation wire icing comes off fully, also the ice-melt deadline is placed on record.This two times of placing on record poor, the said scene of mimic transmission line line conductor that is step (1) that is treats that the ice-melt time of ice-thawing electric transmission line lead under given ice melting current condition is T1;
(6), judge whether test is accomplished.According to step (5) test findings that obtains is to judge whether test is accomplished the ice-melt time: according to step (2) the lead ice melting current value that obtains; One group of current value by wherein maximum makes an experiment, and the ice-melt time made an experiment by one group of wherein minimum current value less than 15 minutes; The ice-melt time was greater than 3 hours; Judge the test completion, also can get into step (8), otherwise get into step (7);
(7), adjustment ice melting current.Ratio according to 20% increases progressively above-mentioned lead ice melting current value and promptly increases progressively above-mentioned I1 according to 20% ratio, or successively decreases above-mentioned lead ice melting current value promptly according to 20% the ratio above-mentioned I1 that successively decreases, repeating step (4)～(6) according to 20% ratio;
(8), draw ice melting current-time curve.In the ice melting current and time corresponding input Excel form with above-mentioned acquisition, draw out the different ice melting currents curve corresponding, be the ice-melt time-characteristic of lead with the ice-melt time.
The invention has the beneficial effects as follows:
1), the test method that provided is simple, easy operating;
2) test method that, is provided can be the ice-melt time current curve that obtains all kinds of model leads guidance is provided;
3) utilize this invention test method can obtain the ice-melt time current curve of all kinds of model leads; This curve can be on-the-spot ice-melt work reference is provided; Prevent the damage that lead causes because of ice-melt, also can prevent lead because of ice melting current too small or time too short can not ice sheet the thawing;
4), the ice melting current-time curve of the lead that obtains through this method, the parameter designing that can be deicing device provides foundation.
Embodiment
Embodiment 1:
(1), confirms the on-the-spot model of treating the ice-thawing electric transmission line lead, the lead of sampling same model;
(2), according to the current density of step (1) lead that obtains, use conventional method to calculate lead ice melting current value.The sectional area of step (1) lead that obtains is less than 240 square millimeters, and its current density value is 3 times of this sectional area of wire;
(3), select one can simulate various weather environment conditions phytotron, in this chamber the device General Current current lifting device, then step (1) lead that obtains is placed this chamber and puts the General Current current lifting device with the chamber to be electrically connected;
(4), use conventional method regulating step (3) the institute indoor weather environment condition of the artificial climate of selecting, make step (3) transmission line wire that obtains simulate icing, ice covering thickness reaches setting value;
(5), setting up procedure (2) the electric current current lifting device of putting, according to step (2) the lead ice melting current value that obtains, apply electric current to lead, make the lead of putting become the mimic transmission line line conductor.When treating that ice-melt begins, the ice-melt start time is placed on record, when ice-melt is accomplished when the transmission line simulation wire icing comes off fully, also the ice-melt deadline is placed on record.This two times of placing on record poor, the ice-melt time of ice-thawing electric transmission line lead under given ice melting current condition is treated at the said scene of mimic transmission line line conductor that is step (1) that is;
(6), judge according to step (5) the ice-melt time of obtaining whether test is accomplished: according to step (2) the lead ice melting current value that obtains; One group of current value by wherein maximum makes an experiment; The ice-melt time was less than 15 minutes; One group of current value by wherein minimum makes an experiment, and the ice-melt time was judged the test completion greater than 3 hours.
Embodiment 2:
Step (1) is with embodiment 1;
(2), according to the current density of step (1) lead that obtains, use conventional method to calculate lead ice melting current value.The sectional area of step (1) lead that obtains is greater than 630 square millimeters, and its current density value is 2 times of this sectional area of wire;
Step (3)～(5) are with embodiment 1;
(6), judge according to step (5) the ice-melt time of obtaining whether test is accomplished: according to step (2) the lead ice melting current value that obtains; One group of current value by wherein maximum makes an experiment; The ice-melt time is not less than 15 minutes, makes an experiment by one group of wherein minimum current value, and the ice-melt time is not more than 3 hours; Judge completion of test, get into step (7);
(7), the ratio according to 20% increases progressively above-mentioned lead ice melting current value, or according to 20% the ratio above-mentioned lead ice melting current value of successively decreasing, repeating step (4)～(6).
The ice melting current of above-mentioned a kind of transmission line wire-time response test method; Reliably feasible through actual practicing proof, reach expected design fully, and simple to operate; Can the guidance that gear to actual circumstances be provided for lead ice-melt work as test findings being depicted as family curve, respond well.
Claims (1)
1. the ice melting current of a transmission line wire-time response test method, this method is following step:
(1), confirms the on-the-spot model of treating the ice-thawing electric transmission line lead, the lead of sampling same model;
(2), according to the current density of step (1) lead that obtains; Use conventional method to calculate lead ice melting current value; The interval of the current density of said lead is: sectional area is 240 square millimeters and following lead, and its current density value is 3 times of this sectional area of wire; Sectional area is 300～500 square millimeters a lead, and its current density value is 2.5 times of this sectional area of wire; Sectional area is 630 square millimeters and above lead, and its current density value is 2 times of this sectional area of wire;
(3), select one can simulate various weather environment conditions phytotron, in this chamber the device General Current current lifting device, then step (1) lead that obtains is placed this chamber and puts the General Current current lifting device with the chamber to be electrically connected;
(4), use conventional method regulating step (3) the institute indoor weather environment condition of the artificial climate of selecting, make step (3) transmission line wire that obtains simulate icing, ice covering thickness reaches setting value;
(5), setting up procedure (2) the electric current current lifting device of putting; According to step (2) the lead ice melting current value that obtains, apply electric current to lead, make the lead of putting become the mimic transmission line line conductor; When treating that ice-melt begins; The ice-melt start time is placed on record, when ice-melt is accomplished when the transmission line simulation wire icing comes off fully, also the ice-melt deadline is placed on record; This two times of placing on record poor, the ice-melt time of ice-thawing electric transmission line lead under given ice melting current condition is treated at the said scene of mimic transmission line line conductor that is step (1) that is;
(6), judge according to step (5) the ice-melt time of obtaining whether test is accomplished: according to step (2) the lead ice melting current value that obtains; One group of current value by wherein maximum makes an experiment; The ice-melt time made an experiment by one group of wherein minimum current value less than 15 minutes, and the ice-melt time was greater than 3 hours; Judge the test completion, otherwise get into step (7);
(7), the ratio according to 20% increases progressively above-mentioned lead ice melting current value, or according to 20% the ratio above-mentioned lead ice melting current value of successively decreasing, repeating step (4)～(6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012100272613A CN102590665A (en) | 2012-02-08 | 2012-02-08 | Method for testing ice melting current-time characteristics of leads of power transmission line |
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| CN2012100272613A CN102590665A (en) | 2012-02-08 | 2012-02-08 | Method for testing ice melting current-time characteristics of leads of power transmission line |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103729524A (en) * | 2014-01-24 | 2014-04-16 | 国家电网公司 | Numerical simulation method for high-current ice-melting of transmission conductor |
| CN105572029A (en) * | 2016-03-25 | 2016-05-11 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Method for simulating ice melting of ground wire of 500kV power transmission line to generate white crystal rust |
| CN105911375A (en) * | 2016-03-22 | 2016-08-31 | 国网江西省电力科学研究院 | Test method of icing critical current characteristics of distribution line |
| CN107422210A (en) * | 2017-08-02 | 2017-12-01 | 国网湖南省电力公司 | A kind of extra-high voltage large-section lead ice-melt characteristic curve acquisition methods |
| CN107607807A (en) * | 2017-08-18 | 2018-01-19 | 国网湖南省电力公司 | The current time characteristic test method and device of a kind of transmission pressure ice-melt |
| CN111025044A (en) * | 2019-11-16 | 2020-04-17 | 国网浙江宁波市奉化区供电有限公司 | Lightning stroke broken line simulation test method for power distribution network |
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| JPS63294208A (en) * | 1987-05-24 | 1988-11-30 | Furukawa Electric Co Ltd:The | Preventive device for falling ice and snow from transmission line |
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| JPS63294208A (en) * | 1987-05-24 | 1988-11-30 | Furukawa Electric Co Ltd:The | Preventive device for falling ice and snow from transmission line |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103729524A (en) * | 2014-01-24 | 2014-04-16 | 国家电网公司 | Numerical simulation method for high-current ice-melting of transmission conductor |
| CN103729524B (en) * | 2014-01-24 | 2017-03-08 | 国家电网公司 | A kind of method for numerical simulation of transmission pressure great current deicing |
| CN105911375A (en) * | 2016-03-22 | 2016-08-31 | 国网江西省电力科学研究院 | Test method of icing critical current characteristics of distribution line |
| CN105572029A (en) * | 2016-03-25 | 2016-05-11 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Method for simulating ice melting of ground wire of 500kV power transmission line to generate white crystal rust |
| CN105572029B (en) * | 2016-03-25 | 2018-02-02 | 中国南方电网有限责任公司超高压输电公司贵阳局 | The method that ground wire produces white crystals corrosion when simulating 500kV earth wire of power transmission line ice-melts |
| CN107422210A (en) * | 2017-08-02 | 2017-12-01 | 国网湖南省电力公司 | A kind of extra-high voltage large-section lead ice-melt characteristic curve acquisition methods |
| CN107607807A (en) * | 2017-08-18 | 2018-01-19 | 国网湖南省电力公司 | The current time characteristic test method and device of a kind of transmission pressure ice-melt |
| CN107607807B (en) * | 2017-08-18 | 2019-04-02 | 国网湖南省电力公司 | A kind of the current time characteristic test method and device of transmission pressure ice-melt |
| CN111025044A (en) * | 2019-11-16 | 2020-04-17 | 国网浙江宁波市奉化区供电有限公司 | Lightning stroke broken line simulation test method for power distribution network |
| CN111025044B (en) * | 2019-11-16 | 2022-08-26 | 国网浙江宁波市奉化区供电有限公司 | Lightning stroke broken line simulation test method for power distribution network |
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Owner name: HU NAN HUICUI ELECTRIC TECHNOLOGY CO., LTD. STATE Free format text: FORMER OWNER: HU NAN HUICUI ELECTRIC TECHNOLOGY CO., LTD. Effective date: 20121015 |
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Effective date of registration: 20121015 Address after: 410007 No. 79 hydroelectric power street, east pond, Hunan, Changsha Applicant after: Science Research Institute of Hunan Electric Power Co., Ltd. Applicant after: Hu'nan Huicui Electric Power Technology Co., Ltd. Applicant after: State Grid Corporation of China Address before: 410007 No. 79 hydroelectric power street, east pond, Hunan, Changsha Applicant before: Science Research Institute of Hunan Electric Power Co., Ltd. Applicant before: Hu'nan Huicui Electric Power Technology Co., Ltd. |
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Application publication date: 20120718 |