CN101242087A - Ice fusion method for power transmission line - Google Patents

Ice fusion method for power transmission line Download PDF

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Publication number
CN101242087A
CN101242087A CNA2008100493291A CN200810049329A CN101242087A CN 101242087 A CN101242087 A CN 101242087A CN A2008100493291 A CNA2008100493291 A CN A2008100493291A CN 200810049329 A CN200810049329 A CN 200810049329A CN 101242087 A CN101242087 A CN 101242087A
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CN
China
Prior art keywords
ice
circuit
melt
isolating switch
circuit breaker
Prior art date
Application number
CNA2008100493291A
Other languages
Chinese (zh)
Inventor
赵根田
Original Assignee
薛辉
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 薛辉 filed Critical 薛辉
Priority to CNA2008100493291A priority Critical patent/CN101242087A/en
Publication of CN101242087A publication Critical patent/CN101242087A/en

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Abstract

The present invention provides a method for melting the ice on the electric transmission line. In the method a current generator and a deicing breaker are installed in a converting station which is installed with the frozen circuit, all the circuits need to be deiced in the converting station are respectively installed with a deicing isolating switch, the output end of the current generator is connected with one receiving terminal of the deicing breaker, the other receiving end of the deicing breaker is connected to the deicing isolating switches on all circuits, in the converting station of the other ends of all circuits each circuit is respectively installed with a deicing isolating switch, one receiving terminal of the isolating switch is connected to the circuit and the other receiving end can be earthed or distantly short-connected, in this way the current generator can be facilitated to output the current which heats the conducting wire through the deicing breaker, the deicing isolating switch, the frozen circuit and the deicing isolating switch at the other end of the circuit in order to melt the ice on the conducting wire.

Description

The method of transmission line ice-melt
Affiliated technical field
The present invention relates in the electric power system, be used to avoid or reduce transmission line causes power outage owing to natural calamity method.
Background technology
Transmission line (mainly referring to 110 kilovolts and above electric pressure) runs into sleety weather, and sleet will constantly be built up on lead and build-up ice.When the weight of icing reaches one regularly, then can break lead, even the accident of falling the bar of generation.
At this difficult problem, the report that adopts big electric current to carry out ice-melt on transmission line was arranged abroad, do not come but also there is realistic plan to promote so far, China's south power circuit suffered ice trouble just to prove absolutely this point in 2007.I propose to adopt the aluminium armor tape that scribbles nano material in 200620031515.9, this aluminium armor tape is wrapped up on the part of path that freezes easily.Be not easy the characteristic of adsorbed water according to nano material, make and fewly on the circuit freeze or do not freeze.The shortcoming of such scheme is manually to wrap up aluminium armor tape on the circuit aloft, and inconvenience therefore operates.I also propose to adopt current changeover switch in 200620032333.3, bundle conductor middle part intraphase conductor is disconnected, and pass through in the lead that whole load currents are only never disconnected, to increase the current strength in the lead.Because above-mentioned load current is by payload decision, deficiency is so that the lead heating sometimes for this current strength, so this scheme is also undesirable.
Summary of the invention
Purpose of the present invention is exactly the method that a kind of transmission line ice-melt will be provided, and it can effectively avoid or reduce lead owing to excessive freeze is pressed down and the generation of the accident of falling the bar.
The object of the present invention is achieved like this: exchanging, in two kinds of transmission systems of direct current, current feedback circuit and ice-melt circuit breaker are installed in the transformer station of icing circuit, all need on the circuit of ice-melt the ice-melt isolating switch to be installed respectively in this transformer station, the output of above-mentioned current feedback circuit is connected with terminals of ice-melt circuit breaker, another terminals of ice-melt circuit breaker with above-mentioned all need the ice-melt isolating switch on the DC ice-melting to be connected, above-mentioned all need in the transformer station of the DC ice-melting other end, the ice-melt isolating switch is installed respectively on every circuit, terminals of this isolating switch are connected with circuit, another terminals can ground connection, can alternate short circuit, can make current feedback circuit by the ice-melt circuit breaker like this, the ice-melt isolating switch, circuit and this circuit other end ice-melt isolating switch output of freezing can make the electric current of lead heating, so that the ice-out on the lead is fallen.
The present invention need install the ice-melt isolating switch in all need the transformer station of ice-melt, also need to install current feedback circuit, ice-melt circuit breaker in the transformer station that has, just having increased investment like this, still is what be worth but cause the economic loss of cutting off the power supply and causing to be compared with conductor glaze formation.
Description of drawings
The concrete grammar of invention is provided by following examples and accompanying drawing thereof.
Fig. 1 adopts 220kv transformer station that line chart the represents ice-melt schematic diagram through 110kv outlet to two a 110kv transformer station in AC transmission system.
Fig. 2 is that the power plant that adopts line chart to represent in AC transmission system send electric ice-melt schematic diagram to distant place 500kv transformer station.
1.220kv inlet wire among the figure, 2.220kv step-down transformer, 3. isolating switch, 4. circuit breaker, 5. isolating switch, 6.110kv circuit, 7. isolating switch, 8. circuit breaker, 9. isolating switch, 10.110kv step-down transformer, 11.110kv step-down transformer, 12. isolating switches, 13. circuit breaker, 14. isolating switches, 15. ice-melt isolating switches, 16. ground wires, 17. ground wire, 18. ice-melt isolating switches, 19.110kv circuit, 20. ice-melt isolating switches, 21. the ice-melt isolating switch, 22. isolating switches, 23. circuit breakers, 24. isolating switch, 25. ice-melt circuit breakers, 26. ground wires, 27. current feedback circuit, 28. generators, 29.500kv step-up transformer, 30. isolating switch, 31. circuit breakers, 32. isolating switches, 33.500kv circuit, 34. isolating switches, 35. circuit breakers, 36. isolating switch, 37. isolating switches, 38. circuit breakers, 39. isolating switch, 40.500kv circuit, 41.500kv step-down transformer, 42. the ice-melt isolating switch, 43. ground wires, 44. ice-melt isolating switches, 45. the ice-melt circuit breaker, 46. ground wires, 47. current feedback circuits.
Embodiment
In Fig. 1: left-half equipment is installed in the 220kv transformer station (not marking among the figure), and right half part equipment is installed in respectively in two 110kv transformer stations (not marking among the figure) by circuit.220kv inlet wire (1) connects step-down transformer (2), and this transformer has two 110kv outlets: outlet by isolating switch (3), circuit breaker (4), isolating switch (5) to circuit (6), by circuit (6) to a 110kv transformer station.In this transformer station, circuit (6) connects 110kv step-down transformer (10) (annotate: this transformer can be powered to the user by 35kv and 10kv voltage, does not draw among the figure) through isolating switch (7), circuit breaker (8), isolating switch (9); Another outlet to circuit (19), is arrived another 110kv transformer station by circuit (19) by isolating switch (24), circuit breaker (23), isolating switch (22).In this transformer station, circuit (19) connects 110kv step-down transformer (11) through isolating switch (14), circuit breaker (13), isolating switch (12).Above-mentioned all devices constitutes two current supply circuits.
Current feedback circuit (27), ice-melt circuit breaker (25), ice-melt isolating switch (21), ice-melt isolating switch (20) are installed in the 220kv transformer station.An output of current feedback circuit (27) is connected with ground wire (26), another output is connected with terminals of ice-melt circuit breaker (25), terminals of another terminals of ice-melt circuit breaker (25) and ice-melt isolating switch (21) and terminals of ice-melt isolating switch (20) are connected, another terminals of ice-melt isolating switch (21) are connected to circuit (6), and another terminals of ice-melt isolating switch (20) are connected to circuit (19).In the transformer station of circuit (6) end, terminals of ice-melt isolating switch (15) are connected on the circuit (6), and another terminals are connected with ground wire (16).In the transformer station of circuit (19) end, terminals of ice-melt isolating switch (18) are connected on the circuit (19), and another terminals are connected with ground wire (17).Comprise circuit (6) and circuit (19), the said equipment constitutes two ice-melt loops.
When circuit normally sent electricity, circuit breaker in the ice-melt loop and isolating switch all were in off-state, and circuit breaker in the current supply circuit and isolating switch all are in closure state.In a single day freeze when reaching certain thickness on the circuit, can one by one ice-melt be carried out in two line outages.Operating process is as follows:
During to circuit (6) ice-melt, at first isolating switch in the current supply circuit (3), circuit breaker (4), isolating switch (5) isolating switch (7), circuit breaker (8) and isolating switch (9) operating sequence are in accordance with regulations disconnected successively, circuit (6) is had a power failure.Then that ice-melt isolating switch (15), ice-melt isolating switch (21), ice-melt circuit breaker (25) in the ice-melt loop is closed successively, the output of current feedback circuit (27) promptly forms the loop by ground wire (26), ice-melt circuit breaker (25), ice-melt isolating switch (21), circuit (6), ice-melt isolating switch (15), ground wire (16).Adjust the current value of current feedback circuit (27) output, lead is generated heat to can be with the temperature of ice-out.Whole deicing processes is estimated about dozens of minutes.After ice-melt finishes, ice-melt circuit breaker (25), ice-melt isolating switch (21), ice-melt isolating switch (15) are disconnected successively, isolating switch in the above-mentioned current supply circuit and circuit breaker operating sequence in accordance with regulations is closed successively, circuit (6) recovery is sent.
During to circuit (19) ice-melt, at first isolating switch in the current supply circuit (24), circuit breaker (23), isolating switch (22), isolating switch (14), circuit breaker (13) and isolating switch (12) operating sequence are in accordance with regulations disconnected successively, circuit (19) is had a power failure.Then that ice-melt isolating switch (18), ice-melt isolating switch (20), ice-melt circuit breaker (25) in the ice-melt loop is closed successively, the output of current feedback circuit (27) promptly forms the loop by ground wire (26), ice-melt circuit breaker (25), ice-melt isolating switch (20), circuit (19), ice-melt isolating switch (18), ground wire (17), and the lead on the circuit (19) is promptly heatable.Ice-melt disconnects ice-melt circuit breaker (25), ice-melt isolating switch (20), ice-melt isolating switch (18) after finishing successively, and isolating switch in the above-mentioned current supply circuit and circuit breaker operating sequence in accordance with regulations is closed successively, makes circuit (19) recover to send.
According to the interrelated data record, the output current value of above-mentioned current feedback circuit generally should be adjusted at more than 2 times of line conductor sectional area.For example sectional area of wire is 300 square millimeters, and then output current value should be more than 600 peaces.
Under actual conditions, a 220kv transformer station has a lot of bar 110kv outlet.Only drawn for simplicity's sake two among the embodiment.No matter outlet what, one by one ice-melt is carried out in every outlet and is got final product.
In Fig. 2: left-half equipment is installed in the power plant and (does not mark among the figure), and right half part equipment is installed in the 500kv transformer station and (does not mark among the figure).After generator (28) sends electricity, boost to 500kv, arrive circuit (33) through isolating switch (30), circuit breaker (31), isolating switch (32) then, carry to the distant place by circuit (33) through transformer (29).Through arriving 500kv transformer station behind the segment distance, in transformer station, at first (transformer can outwards be exported by other electric pressure to step-down transformer (41) by isolating switch (34) circuit breaker (35), isolating switch (36), do not draw among the figure), arrive circuit (40) by isolating switch (37), circuit breaker (38), isolating switch (39) again then, can send to next stage transformer station like this.Except that isolating switch (37), circuit breaker (38), isolating switch (39), circuit (40), above-mentioned miscellaneous equipment constitutes a current supply circuit.
Current feedback circuit (47), ice-melt circuit breaker (45), ice-melt isolating switch (44) are installed in the power plant.An output of current feedback circuit (47) is connected with ground wire (46), another output is connected with terminals of ice-melt circuit breaker (45), another terminals of ice-melt circuit breaker (45) are connected with terminals of ice-melt isolating switch (44), and another terminals of ice-melt isolating switch (44) are connected with circuit (33).In circuit (33) other end 500kv transformer station, terminals of ice-melt isolating switch (42) are connected on the circuit (33), and another terminals are connected with ground wire (43).Comprise circuit (33), the said equipment constitutes an ice-melt loop.
Identical with Fig. 1, when circuit normally sent electricity, circuit breaker in the ice-melt loop and isolating switch all were in off-state, and circuit breaker in the current supply circuit and isolating switch all are in closure state.Carry out ice-melt when reaching certain thickness in case freeze on the circuit.Operating process is as follows:
At first with isolating switch in the current supply circuit (30), circuit breaker (31), isolating switch (32), isolating switch (34) circuit breaker (35), isolating switch (36) operating sequence in accordance with regulations disconnects successively, circuit (33) is had a power failure, then with ice-melt isolating switch (42) in the ice-melt loop, ice-melt isolating switch (44), ice-melt circuit breaker (45) is closed successively, the output of current feedback circuit (47) is promptly by ground wire (46), ice-melt circuit breaker (45), ice-melt isolating switch (44), circuit (33), ice-melt isolating switch (42), ground wire (43) forms the loop, and the lead on the circuit (33) is promptly heatable.After ice-melt finishes, ice-melt circuit breaker (45), ice-melt isolating switch (44), ice-melt isolating switch (42) are disconnected successively, with the isolating switch in the above-mentioned current supply circuit and circuit breaker in accordance with regulations order closed successively, circuit (33) recovery is given.
In Fig. 1, Fig. 2, if the symmetrical alternating current of current feedback circuit (27), (47) output three, according to the characteristic of three-phase alternating current, all ground wires can be dispensed.So, only need the alternate short circuit of another terminals of ice-melt isolating switch (18), (15), (42) is got final product.
In DC transmission system, the installation of current feedback circuit, ground wire, ice-melt circuit breaker and ice-melt isolating switch and ice-melt operation and AC system are identical, all be with after the line outage of freezing, make the lead heating by the ice-melt loop, so that the ice-out on the lead is fallen.But in DC transmission system, just no longer called transformer station, and be to use current conversion station, this title of switchyard.Easy in order to write, be referred to as transformer station at this.
The electric current of current feedback circuit output can be direct current, interchange, can be three-phase, single-phase, and this technology is ripe already at present, is not described in detail in this.

Claims (1)

  1. The method of transmission line ice-melt, the heat that produces when adopting big electric current by lead carries out ice-melt, it is characterized in that current feedback circuit and ice-melt circuit breaker are installed in the transformer station of icing circuit, all need on the circuit of ice-melt the ice-melt isolating switch to be installed respectively in this transformer station, the output of above-mentioned current feedback circuit is connected with terminals of ice-melt circuit breaker, another terminals of ice-melt circuit breaker with above-mentioned all need the ice-melt isolating switch on the DC ice-melting to be connected, above-mentioned all need in the transformer station of the DC ice-melting other end, the ice-melt isolating switch is installed respectively on every circuit, terminals of this isolating switch are connected with circuit, another terminals can ground connection, can alternate short circuit, can make current feedback circuit by the ice-melt circuit breaker like this, the ice-melt isolating switch, circuit and this circuit other end ice-melt isolating switch output of freezing can make the electric current of lead heating, so that the ice-out on the lead is fallen.
CNA2008100493291A 2008-03-10 2008-03-10 Ice fusion method for power transmission line CN101242087A (en)

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Application Number Priority Date Filing Date Title
CNA2008100493291A CN101242087A (en) 2008-03-10 2008-03-10 Ice fusion method for power transmission line

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102136711A (en) * 2011-01-20 2011-07-27 何正华 Method for forming resistance heat to melt ice on high-tension line with low tension
CN102299499A (en) * 2011-01-28 2011-12-28 潘旭辉 Ice melting scheme of circuit alternating-current short circuit after voltage reduction for 10kV power supply through 35kV main transformer
CN102931621A (en) * 2012-11-21 2013-02-13 梁一桥 Alternating-current deicing device for distribution line
WO2013026253A1 (en) * 2011-08-25 2013-02-28 南方电网科学研究院有限责任公司 Power transmission line de-icing system and method thereof implemented using back braking operation during the whole process
CN103138281A (en) * 2013-02-26 2013-06-05 南京南瑞继保电气有限公司 Method for merging multi-terminal flexile direct current transmission system outage station into operation system
CN103378574A (en) * 2012-04-25 2013-10-30 南京南瑞继保电气有限公司 Control protection method for achieving deicing function of direct-current deicing device
CN103618329A (en) * 2013-11-27 2014-03-05 南方电网科学研究院有限责任公司 Multi-end flexible direct-current power transmission system and method for online isolation and grid connection of single station of multi-end flexible direct-current power transmission system
CN104934919A (en) * 2015-04-13 2015-09-23 中国民航大学 High-altitude power transmission line segment detection self-snow melting system of utilizing nuclear power and control method
CN107394734A (en) * 2017-08-30 2017-11-24 国网湖南省电力公司 The exchange de-icing method of 35kV distribution network lines
CN107516846A (en) * 2017-08-30 2017-12-26 国网湖南省电力公司 New de-icing method for agriculture distribution
CN108899851A (en) * 2018-08-23 2018-11-27 国网湖南省电力有限公司 A kind of electrification deicing topology system and its de-icing method based on resonance circuit
CN108899853A (en) * 2018-08-23 2018-11-27 国网湖南省电力有限公司 A kind of electrification deicing topology system and its de-icing method

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102136711A (en) * 2011-01-20 2011-07-27 何正华 Method for forming resistance heat to melt ice on high-tension line with low tension
CN102299499A (en) * 2011-01-28 2011-12-28 潘旭辉 Ice melting scheme of circuit alternating-current short circuit after voltage reduction for 10kV power supply through 35kV main transformer
WO2013026253A1 (en) * 2011-08-25 2013-02-28 南方电网科学研究院有限责任公司 Power transmission line de-icing system and method thereof implemented using back braking operation during the whole process
CN103378574B (en) * 2012-04-25 2016-03-02 南京南瑞继保电气有限公司 DC de-icing device realizes the Control protection method of ice-melt function
CN103378574A (en) * 2012-04-25 2013-10-30 南京南瑞继保电气有限公司 Control protection method for achieving deicing function of direct-current deicing device
CN102931621A (en) * 2012-11-21 2013-02-13 梁一桥 Alternating-current deicing device for distribution line
CN102931621B (en) * 2012-11-21 2015-03-25 梁一桥 Alternating-current deicing device for distribution line
CN103138281A (en) * 2013-02-26 2013-06-05 南京南瑞继保电气有限公司 Method for merging multi-terminal flexile direct current transmission system outage station into operation system
US10283965B2 (en) 2013-02-26 2019-05-07 Nr Electric Co., Ltd Method for incorporating non-operating station into operating system in multi-terminal flexible DC transmission system
WO2014131373A1 (en) * 2013-02-26 2014-09-04 南京南瑞继保电气有限公司 Method for merging non-operating station into operating system in multi-terminal flexible direct current transmission system
CN103138281B (en) * 2013-02-26 2015-07-08 南京南瑞继保电气有限公司 Method for merging multi-terminal flexile direct current transmission system outage station into operation system
CN103618329A (en) * 2013-11-27 2014-03-05 南方电网科学研究院有限责任公司 Multi-end flexible direct-current power transmission system and method for online isolation and grid connection of single station of multi-end flexible direct-current power transmission system
CN104934919A (en) * 2015-04-13 2015-09-23 中国民航大学 High-altitude power transmission line segment detection self-snow melting system of utilizing nuclear power and control method
CN107394734A (en) * 2017-08-30 2017-11-24 国网湖南省电力公司 The exchange de-icing method of 35kV distribution network lines
CN107516846A (en) * 2017-08-30 2017-12-26 国网湖南省电力公司 New de-icing method for agriculture distribution
CN108899851A (en) * 2018-08-23 2018-11-27 国网湖南省电力有限公司 A kind of electrification deicing topology system and its de-icing method based on resonance circuit
CN108899853A (en) * 2018-08-23 2018-11-27 国网湖南省电力有限公司 A kind of electrification deicing topology system and its de-icing method
CN108899853B (en) * 2018-08-23 2020-02-04 国网湖南省电力有限公司 Live-line ice melting topological system and ice melting method thereof

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