CN106058777B - A kind of extra high voltage line ice melting system and its automatic ice melting method - Google Patents
A kind of extra high voltage line ice melting system and its automatic ice melting method Download PDFInfo
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- CN106058777B CN106058777B CN201610589343.5A CN201610589343A CN106058777B CN 106058777 B CN106058777 B CN 106058777B CN 201610589343 A CN201610589343 A CN 201610589343A CN 106058777 B CN106058777 B CN 106058777B
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- 238000002844 melting Methods 0.000 title claims abstract description 85
- 230000008018 melting Effects 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000004020 conductor Substances 0.000 claims description 23
- 230000005540 biological transmission Effects 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims description 2
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- 230000008901 benefit Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010257 thawing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000004870 electrical engineering Methods 0.000 description 1
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- 238000002474 experimental method Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/16—Devices for removing snow or ice from lines or cables
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Abstract
The invention discloses a kind of extra high voltage line ice melting system and its de-icing method, extra high voltage line ice melting system includes extra high voltage line deicing device, two turn of three switching device, three-phase bus, the first ground wire deicing access device, the second ground wire deicing access device, wire ice-melt access device, wire ice-melt short-circuiting means and ground wire deicing short-circuiting means；De-icing method, which includes control extra high voltage line deicing device, two turn of three switching device, three-phase bus, the first ground wire deicing access device, the second ground wire deicing access device, wire ice-melt access device, wire ice-melt short-circuiting means and ground wire deicing short-circuiting means, to be treated the wire and ground wire of ice-melt extra high voltage line and carries out ice-melt.The present invention can significantly improve the ice-melt efficiency of extra high voltage line, save a large amount of personnel, simplify execute-in-place, save a large amount of ice-melt times, the safety of ice-melt personnel, safety, quick development extra high voltage line ice-melt work, so as to ensure extra high voltage line power supply reliability are ensured simultaneously.
Description
Technical field
The present invention relates to electrical engineering technical field, and in particular to a kind of extra high voltage line ice melting system and its automatic defrosting
Method.
Background technology
The distribution of National energy distribution and load center is extremely unbalanced, and the resource such as water power, coal is mainly distributed on western part
And the Northwest, and electricity needs is concentrated mainly on east and Southern Coast area, which dictates that China must carry out long distance
From, extensive, high efficiency transmission of electricity, electric power resource is distributed rationally in China to realize.Extra-high voltage grid is to solve China
Energy resources and the inevitable choice that load center is in contrary distribution, and extra high voltage line fed distance is long, its corridor institute is through area
With a varied topography, meteorological condition is changeable, easily occurs serious icing and the accidents such as the broken string of falling tower occurs.Extra high voltage line transmission capacity
Greatly, supply district is wide, and reliability requirement is very high, once occurring the icing broken string of falling tower, easily causes bulk power grid off-the-line, causes big
Area has a power failure, and national economy and people's production and living are constituted a serious threat.UHV transmission line using anti-ice measure as carried
High design ice covering thickness, every kilometer of investment is accomplished by that increase expense is millions of, and a track investment need to increase expense more than ten00000000.Such as
Ice-melt is carried out to UHV transmission line using ice-melt measure, deicing device only needs investment several ten million, and economic benefit is fairly obvious.
At present, the anti-icing mitigation National Key Laboratory of power network power transmission and transforming equipment has succeeded in developing the ice-melt dress of extra high voltage line
Put, and complete in laboratory every experiment, performance meets ice-melt requirement.But, device is not yet applied to Practical Project, such as should
It is how for reality, the problem of most critical by device line attachment.If using manual patch, because of extra-high line ball
Road ice melting current is big, and wiring workload is very huge, it is necessary to which 40~50 people spend 3~4 day time, and circuit is gone up under ice and snow weather
There is very big potential safety hazard in work high above the ground, be unsatisfactory for the requirement of extra high voltage line ice-melt promptness and security.Therefore, it is necessary to
Carry out the research that extra high voltage line deicing device automatically accesses method, being that extra high voltage line is safe, quickly carry out ice-melt work carries
For technical support.
The content of the invention
The technical problem to be solved in the present invention：For the manual wiring efficiency of extra high voltage line deicing device is low, security is poor
Present situation extra high voltage line deicing device can be automatically accessed there is provided one kind and treat ice-melt extra high voltage line, spy can be significantly improved
The ice-melt efficiency of high-tension line, saves a large amount of personnel, simplifies execute-in-place, saves a large amount of ice-melt times, while ensureing ice-melt people
The safety of member, safety, quick development extra high voltage line ice-melt work, so as to ensure the extra-high voltage of extra high voltage line power supply reliability
Line ice-melting system and its automatic ice melting method.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：
A kind of automatic ice melting method of extra high voltage line ice melting system, the extra high voltage line ice melting system, including it is extra-high
Line ball road deicing device, two turn of three switching device, three-phase bus, the first ground wire deicing access device, the access of the second ground wire deicing
Device, wire ice-melt access device, wire ice-melt short-circuiting means and ground wire deicing short-circuiting means, two turn of three switching device
Two inputs are connected with the output end of extra high voltage line deicing device, three output ends of two turn of three switching device respectively with
A phase bus in three-phase bus is connected, and each phase of the three-phase bus by wire ice-melt access device and treats that ice-melt is special respectively
The each of high-tension line is connected, and the three-phase bus A phases by the first ground wire deicing access device, treat the extra-high line ball of ice-melt
First ground wire on road is connected with ground wire deicing short-circuiting means, the C phases of the three-phase bus by the second ground wire deicing access device,
Treat that the second ground wire of ice-melt extra high voltage line is connected with ground wire deicing short-circuiting means, the ground wire deicing short-circuiting means is also with waiting to melt
The single-phase transmission line of ice extra high voltage line is connected, and includes the step of automatic ice melting method：
1）It will treat that the three-phase conducting wire of ice-melt extra high voltage line, the power supply of ground wire are pulled open, the ice-melt extra high voltage line for the treatment of
Ground wire includes the first ground wire and the second ground wire；
2）Cut off extra high voltage line deicing device, two turn of three switching device, the first ground wire deicing access device, the second ground wire
Ice-melt access device, wire ice-melt access device and ground wire deicing short-circuiting means, input wire ice-melt short-circuiting means will treat ice-melt
A, B, C three-phase conducting wire short circuit of extra high voltage line；
3）Wire ice-melt access device is put into, A, B, C three-phase conducting wire for treating ice-melt extra high voltage line are accessed into three-phase bus；
4）The wire ice-melt mode of ice-melt extra high voltage line is treated in selection, and the wire ice-melt mode is in series ice-melt including two
Pattern and two and a string of ice-melt mode；
5）The output voltage positive-negative polarity of three output ends of two turn of three switching device is controlled according to wire ice-melt mode；
6）Extra high voltage line deicing device is put into, A, B, C three-phase conducting wire ice-melt of ice-melt extra high voltage line is treated；
7）Cut off extra high voltage line deicing device, two turn of three switching device, wire ice-melt access device, wire ice-melt short circuit
Device, determines the ground wire short circuit mode of two ground wires, the ground wire short circuit mode include two ground wires series connection short circuit mode and
The short circuit mode of single ground wire series connection B phase conductors；
8）Ground wire deicing short-circuiting means is controlled to treat the ground wire of ice-melt extra high voltage line according to the ground wire short circuit mode of determination
Ground connection；
9）Ground wire is accessed by three-phase bus according to ground wire short circuit mode；
10）The output voltage positive-negative polarity of three output ends of two turn of three switching device is controlled according to ground wire short circuit mode；
11）Extra high voltage line deicing device is put into, the output voltage of extra high voltage line deicing device is automatically accessed and waits to melt
The ground wire of ice extra high voltage line realizes the ice-melt for the ground wire for treating ice-melt extra high voltage line；
12）After the completion of ice-melt, excision extra high voltage line deicing device, two turn of three switching device, the first ground wire deicing connect
Enter device, the second ground wire deicing access device, wire ice-melt access device, wire ice-melt short-circuiting means and ground wire deicing short circuit dress
Put, exit ice-melt；
13）It will treat that the three-phase conducting wire of ice-melt extra high voltage line, the power supply of ground wire close respectively, recover normal power supply.
Preferably, the step 4）Detailed step include：Led according to the three-phase conducting wire for treating ice-melt extra high voltage line is single-phase
The resistance that the resistance calculations two of line are in series, described two resistance being in series are twice of the resistance of single-phase transmission line, by extra-high voltage
The output end voltage of line ice-melting device divided by two resistance being in series obtain ice melting current, if ice melting current is more than or equal to
Treat the minimum ice melting current of the three-phase conducting wire of ice-melt extra high voltage line, then it is preferential to be in series ice-melt mode using two；Otherwise, if
Ice melting current is less than the minimum ice melting current for the three-phase conducting wire for treating ice-melt extra high voltage line, then using two and a string of ice-melt mould
Formula.
Preferably, the step 5）Detailed step include：The type of wire ice-melt mode is judged, if wire ice-melt mould
Formula is two to be in series ice-melt mode, then the output voltage for control the A phase output terminals of two turn of three switching device is that positive polarity, C phases are defeated
The output voltage for going out end is negative polarity；If wire ice-melt mode is the ice-melt mode of two and a string, two turn of three switching is controlled
The output voltage of the B phase output terminals of device is that positive polarity, the output voltage of A phase output terminals are negative polarity, the output of C phase output terminals
Voltage is negative polarity.
Preferably, the step 7）The middle detailed step for determining ground wire short circuit mode includes：According to treating the extra-high line ball of ice-melt
The resistance of two ground wire series connection of resistance calculations of the single ground wire on road, the resistance of two ground wires series connection is the electricity of single ground wire
Twice of resistance, ice melting current is obtained by the resistance of the output end voltage of extra high voltage line deicing device divided by two ground wire series connection,
If ice melting current is more than or equal to the minimum ice melting current for the single ground wire for treating ice-melt extra high voltage line, preferential to use two
The short circuit mode of ground wire series connection；Otherwise, if ice melting current is less than the minimum ice-melt for the single ground wire for treating ice-melt extra high voltage line
Electric current, then the short circuit mode for B phase conductors of being connected using single ground wire.
Preferably, the step 8）According to the ground wire short circuit mode of determination control two by ground wire deicing short-circuiting means
When ground wire grounded, if it is determined that ground wire short circuit mode for the series connection of two ground wires short circuit mode, then by the in two ground wires
One ground wire and the second ground wire access ground wire deicing short-circuiting means realize short circuit；If it is determined that ground wire short circuit mode be single ground wire
The short circuit mode of series connection B phase conductors, then access ground wire deicing short-circuiting means by the first ground wire in two ground wires or the second ground wire
Realize short circuit.
Preferably, the step 9）When ground wire being accessed into three-phase bus according to ground wire short circuit mode, if ground wire short circuit side
Formula is the short circuit mode of two ground wire series connection, then puts into the first ground wire deicing access device and the second ground wire deicing access device；
Connected the short circuit modes of B phase conductors if ground wire short circuit mode is single ground wire, the is put into when selecting ground wire to be the first ground wire
One ground wire deicing access device and wire ice-melt access device, put into the second ground wire deicing and connect when selecting ground wire to be the second ground wire
Enter device and wire ice-melt access device.
Preferably, the step 10）Detailed step include：Judge ground wire short circuit mode type, if it is determined that ground
Line short circuit mode is the short circuit mode of two ground wire series connection, then controls the output voltage of the A phase output terminals of two turn of three switching device
It is negative polarity for the output voltage of positive polarity, C phase output terminals；If ground wire short circuit mode is single ground wire series connection B phase conductors
Short circuit mode, the output voltage that the A phase output terminals of two turn of three switching device are then controlled when selecting ground wire to be the first ground wire is just
Polarity, the output voltage of B phase output terminals are negative polarity, and two turn of three switching device is then controlled when selecting ground wire to be the second ground wire
The output voltage of C phase output terminals is that positive polarity, the output voltage of B phase output terminals are negative polarity.
The advantage of extra high voltage line ice melting system of the present invention is as follows：The present invention include extra high voltage line deicing device, two turns
Three switching devices, three-phase bus, the first ground wire deicing access device, the second ground wire deicing access device, wire ice-melt access dress
Put, wire ice-melt short-circuiting means and ground wire deicing short-circuiting means, extra high voltage line deicing device can be automatically accessed and treat that ice-melt is special
High-tension line, treats ice-melt extra high voltage line, you can it is extra-high that ice-melt is treated in realization by each access device and short-circuiting means connection
The automatic defrosting on line ball road, ice-melt operating efficiency is high, without artificial upper tower wiring, a large amount of personnel is saved, when saving a large amount of ice-melts
Between, while ensureing the safety of ice-melt personnel, it can safely, quickly carry out extra high voltage line ice-melt work, so as to ensure extra-high line ball
Road power supply reliability.
The automatic ice melting method of extra high voltage line ice melting system of the present invention is based on extra high voltage line ice melting system of the present invention
Automatic ice melting method, by melting including extra high voltage line deicing device, two turn of three switching device, three-phase bus, the first ground wire
Ice access device, the second ground wire deicing access device, wire ice-melt access device, wire ice-melt short-circuiting means and ground wire deicing are short
The control of road device can be achieved to treat each phase conductor of ice-melt extra high voltage line and the ice-melt of ground wire, equally also have the present invention
The aforementioned advantages of extra high voltage line ice melting system, will not be repeated here.
Brief description of the drawings
Fig. 1 is the extra high voltage line ice melting system structural representation of the embodiment of the present invention one.
Marginal data：1st, extra high voltage line deicing device；2nd, two turn of three switching device；3rd, three-phase bus；4th, the first ground wire
Ice-melt access device；5th, the second ground wire deicing access device；6th, wire ice-melt access device；7th, wire ice-melt short-circuiting means；8、
Ground wire deicing short-circuiting means.
Embodiment
Embodiment one：
As shown in figure 1, the extra high voltage line ice melting system of the present embodiment include extra high voltage line deicing device 1, two turn three
Switching device 2, three-phase bus 3, the first ground wire deicing access device 4, the second ground wire deicing access device 5, wire ice-melt access
Device 6, wire ice-melt short-circuiting means 7 and ground wire deicing short-circuiting means 8, two inputs of two turn of three switching device 2 and extra-high
The output end of line ball road deicing device 1 is connected, three output ends of two turn of three switching device 2 respectively with the phase in three-phase bus 3
Bus is connected, and each of three-phase bus 3 mutually passes through wire ice-melt access device 6 and each phase phase for treating ice-melt extra high voltage line respectively
Even, and three-phase bus 3 A phases by the first ground wire deicing access device 4, treat the first ground wire and ground wire of ice-melt extra high voltage line
Ice-melt short-circuiting means 8 is connected, the C phases of three-phase bus 3 by the second ground wire deicing access device 5, treat ice-melt extra high voltage line
Second ground wire is connected with ground wire deicing short-circuiting means 8, and ground wire deicing short-circuiting means 8 is also with treating that the single-phase of ice-melt extra high voltage line is led
Line is connected.
In the present embodiment, ground wire deicing short-circuiting means 8 is with treating that the B phase conductors of ice-melt extra high voltage line are connected, in addition, also may be used
To select with treating that the A phases or C phase conductors of ice-melt extra high voltage line are connected, corresponding two are in series ice-melt mode and two and a string
The connected mode of ice-melt mode is also required to carry out corresponding adjustment, and its principle is identical with the present embodiment, therefore no longer goes to live in the household of one's in-laws on getting married herein
State.
In the present embodiment, extra high voltage line deicing device 1, two turn of three switching device 2, the first ground wire deicing access device 4,
Second ground wire deicing access device 5, wire ice-melt access device 6, wire ice-melt short-circuiting means 7 and ground wire deicing short-circuiting means 8
On be equipped with for control itself to put into and excision state fling-cut switch, each phase output terminal of two turn of three switching device 2 sets
Have for controlling the output polarity of output positive-negative polarity to switch switch, therefore extra high voltage line deicing device 1, two turn of three switching dress
Put the 2, first ground wire deicing access device 4, the second ground wire deicing access device 5, wire ice-melt access device 6, wire ice-melt short
The operation of road device 7 and ground wire deicing short-circuiting means 8 is shift knob operation, simple to operate, quickness and high efficiency.
Ice-melt extra high voltage line is the southern line of extra-high voltage length to treating in the present embodiment, hereafter will be with to the southern line progress of extra-high voltage length
Exemplified by ice-melt, the automatic ice melting method of the present embodiment extra high voltage line ice melting system is further described.
The automatic ice melting method of the present embodiment extra high voltage line ice melting system, step includes：
1）The southern three-phase conducting wire of line of extra-high voltage length, the power supply of ground wire are pulled open, the ground wire of extra-high voltage length south line includes first
Ground wire and the second ground wire, so that the southern line of extra-high voltage length be powered off；
2）Cut off extra high voltage line deicing device 1, two turn of three switching device 2, the first ground wire deicing access device 4, second
Ground wire deicing access device 5, wire ice-melt access device 6 and ground wire deicing short-circuiting means 8, input wire ice-melt short-circuiting means 7
By A, B, C three-phase conducting wire short circuit of the southern line of extra-high voltage length；In the present embodiment, wire ice-melt short-circuiting means 7 is specific in distance main deformation
Wire ice-melt short-circuiting means 7 is put at the 100km of power station, by wire A, B, C three-phase short circuit of the southern line of extra-high voltage length；
3）Wire ice-melt access device 6 is put into, A, B, C three-phase conducting wire of the southern line of extra-high voltage length are accessed into three-phase bus 3；
4）Select the wire ice-melt mode of the southern line of extra-high voltage length, wire ice-melt mode is in series ice-melt mode and two including two
And a string of ice-melt mode；The present embodiment specifically chosen two is in series ice-melt mode；
5）The output voltage positive-negative polarity of three output ends of two turn of three switching device 2 is controlled according to wire ice-melt mode；
6）Extra high voltage line deicing device 1 is put into, A, B, C three-phase conducting wire ice-melt to the southern line of extra-high voltage length；
7）Cut off extra high voltage line deicing device 1, two turn of three switching device 2, wire ice-melt access device 6, wire ice-melt
Short-circuiting means 7, determines the ground wire short circuit mode of two ground wires, ground wire short circuit mode include two ground wires series connection short circuit mode and
The short circuit mode of single ground wire series connection B phase conductors；
8）Ground wire deicing short-circuiting means 8 is controlled to connect the ground wire of the southern line of extra-high voltage length according to the ground wire short circuit mode of determination
Ground；
9）Ground wire is accessed by three-phase bus 3 according to ground wire short circuit mode；
10）The output voltage positive-negative polarity of three output ends of two turn of three switching device 2 is controlled according to ground wire short circuit mode；
11）Extra high voltage line deicing device 1 is put into, the output voltage of extra high voltage line deicing device 1 is automatically accessed into spy
The ground wire of high pressure length south line realizes the ice-melt of the ground wire to the southern line of extra-high voltage length；
12）After the completion of ice-melt, excision extra high voltage line deicing device 1, two turn of three switching device 2, the first ground wire deicing
Access device 4, the second ground wire deicing access device 5, wire ice-melt access device 6, wire ice-melt short-circuiting means 7 and ground wire deicing
Short-circuiting means 8, exits ice-melt；
13）The southern three-phase conducting wire of line of extra-high voltage length, the power supply of ground wire are closed respectively, recover the normal of the southern line of extra-high voltage length
Power supply.
In the present embodiment, step 4）Detailed step include：According to the three-phase conducting wire single-phase transmission line of the southern line of extra-high voltage length
The resistance that resistance calculations two are in series, two resistance being in series are twice of the resistance of single-phase transmission line, by extra high voltage line ice-melt
The output end voltage of device 1 divided by two resistance being in series obtain ice melting current, if ice melting current is more than or equal to extra-high voltage
The minimum ice melting current of the three-phase conducting wire of long south line, then it is preferential to be in series ice-melt mode using two；Otherwise, if ice melting current is small
In the minimum ice melting current of the three-phase conducting wire of the southern line of extra-high voltage length, then using two and a string of ice-melt mode.Will in the present embodiment
The ice melting current that the output end voltage of extra high voltage line deicing device 1 divided by two resistance being in series are obtained is 10050A, is more than
The minimum ice melting current 8000A of long south line wire, therefore be in series ice-melt mode using two.
In the present embodiment, step 5）Detailed step include：The type of wire ice-melt mode is judged, if wire ice-melt mould
Formula is two to be in series ice-melt mode, then the output voltage for control the A phase output terminals of two turn of three switching device 2 is that positive polarity, C phases are defeated
The output voltage for going out end is negative polarity；If wire ice-melt mode is the ice-melt mode of two and a string, two turn of three switching is controlled
The output voltage of the B phase output terminals of device 2 be positive polarity, the output voltage of A phase output terminals be negative polarity, C phase output terminals it is defeated
Go out voltage for negative polarity.In the present embodiment, wire ice-melt mode is two to be in series ice-melt mode, therefore two turn of three switching dress of control
The output voltage for putting 2 A phase output terminals is positive polarity（" ﹢ " pole tension）, C phase output terminals output voltage be negative polarity（" ﹣ " pole
Voltage）.
In the present embodiment, step 7）The middle detailed step for determining ground wire short circuit mode includes：According to the southern line of extra-high voltage length
The resistance of two ground wire series connection of resistance calculations of single ground wire, the resistance of two ground wire series connection is the two of the resistance of single ground wire
Times, the resistance of the output end voltage of extra high voltage line deicing device 1 divided by two ground wire series connection is obtained into ice melting current, if melted
Ice electric current is more than or equal to the minimum ice melting current of the single ground wire of the southern line of extra-high voltage length, then preferential to use what two ground wires were connected
Short circuit mode；Otherwise, if ice melting current is less than the minimum ice melting current of the single ground wire of the southern line of extra-high voltage length, using single
The short circuit mode of ground wire series connection B phase conductors.In the present embodiment, by the output end voltage of extra high voltage line deicing device 1 divided by two
The ice melting current that the resistance of root ground wire series connection is obtained is 520A, and more than the minimum ice melting current 400A of long southern line ground wire, ground wire is adopted
The short circuit mode connected with two ground wires.
In the present embodiment, step 8）According to the ground wire short circuit mode of determination control two by ground wire deicing short-circuiting means 8
When root is ground wire grounded, if it is determined that ground wire short circuit mode for the series connection of two ground wires short circuit mode, then by two ground wires
First ground wire and the second ground wire access ground wire deicing short-circuiting means 8 realize short circuit；If it is determined that ground wire short circuit mode to be single
The short circuit mode of ground wire series connection B phase conductors, then access ground wire deicing short circuit by the first ground wire in two ground wires or the second ground wire
Device 8 realizes short circuit.In the present embodiment, the short circuit mode that ground wire is connected using two ground wires, therefore control transformer station in distance
First ground wire and the second ground wire are accessed into the device using ground wire deicing short-circuiting means 8 at 100km and realize short circuit.
In the present embodiment, step 9）When ground wire being accessed into three-phase bus 3 according to ground wire short circuit mode, if ground wire short circuit side
Formula is the short circuit mode of two ground wire series connection, then puts into the first ground wire deicing access device 4 and the second ground wire deicing access device
5；If ground wire short circuit mode is the short circuit mode of single ground wire series connection B phase conductors, put into when selecting ground wire to be the first ground wire
First ground wire deicing access device 4 and wire ice-melt access device 6, put into the second ground wire and melt when selecting ground wire to be the second ground wire
Ice access device 5 and wire ice-melt access device 6.In the present embodiment, the short circuit mode that ground wire is connected using two ground wires, therefore
The first ground wire deicing access device 4 and the second ground wire deicing access device 5 are put into, ground wire is accessed into three-phase bus 3.
In the present embodiment, step 10）Detailed step include：Judge ground wire short circuit mode type, if it is determined that ground
Line short circuit mode is the short circuit mode of two ground wire series connection, then controls the output voltage of the A phase output terminals of two turn of three switching device 2
It is negative polarity for the output voltage of positive polarity, C phase output terminals；If ground wire short circuit mode is single ground wire series connection B phase conductors
Short circuit mode, the output voltage that the A phase output terminals of two turn of three switching device 2 are then controlled when selecting ground wire to be the first ground wire is just
Polarity, the output voltage of B phase output terminals are negative polarity, and two turn of three switching device 2 is then controlled when selecting ground wire to be the second ground wire
The output voltages of C phase output terminals be that positive polarity, the output voltage of B phase output terminals are negative polarity.In the present embodiment, ground wire is used
The short circuit mode of two ground wire series connection, therefore A phases are exported " ﹢ " pole tension, C by Changzhi transformer station using two turn of three switching device 2
Mutually export " ﹣ " pole tension.
In summary, the extra high voltage line ice melting system and its de-icing method of the present embodiment have following beneficial effects：1、
Extra high voltage line deicing device 1 can be automatically accessed and treat ice-melt extra high voltage line, ice-melt operating efficiency is high；2nd, all access dresses
Put, switching device, short-circuiting means can use push-botton operation, simple to operate；3rd, without manually upper tower wiring, save a large amount of
Personnel, save a large amount of ice-melt times, while ensureing the safety of ice-melt personnel；4th, extra high voltage line ice-melt can safely, be quickly carried out
Work, so as to ensure extra high voltage line power supply reliability.
Embodiment two：
The extra high voltage line ice melting system of the present embodiment is identical with embodiment one, and ice-melt is extra-high for treating in the present embodiment
Line ball road is extra-high voltage all banyan lines, hereafter will be exemplified by carrying out ice-melt to extra-high voltage all banyan lines, to the present embodiment extra high voltage line
The automatic ice melting method of ice melting system is further described.
The automatic ice melting method of the present embodiment extra high voltage line ice melting system, step includes：
1）The extra-high voltage all three-phase conducting wire of banyan line, the power supply of ground wire are pulled open, the ground wire of extra-high voltage all banyan lines includes first
Ground wire and the second ground wire, so that extra-high voltage all banyan lines be powered off；
2）Cut off extra high voltage line deicing device 1, two turn of three switching device 2, the first ground wire deicing access device 4, second
Ground wire deicing access device 5, wire ice-melt access device 6 and ground wire deicing short-circuiting means 8, at away from Rong Cheng transformer stations 180km
Wire ice-melt short-circuiting means 7 is put into by A, B, C three-phase conducting wire short circuit of extra-high voltage all banyan lines；In the present embodiment, wire ice-melt is short
Road device 7 is specific to control input wire ice-melt short-circuiting means 7 transformer station 100km in distance, by the wire A of extra-high voltage all banyan lines,
B, C three-phase short circuit；
3）Wire ice-melt access device 6 is put into, A, B, C three-phase conducting wire of extra-high voltage all banyan lines are accessed into three-phase bus 3；
4）Select the wire ice-melt mode of extra-high voltage all banyan line, wire ice-melt mode is in series ice-melt mode and two including two
And a string of ice-melt mode；The present embodiment specifically chosen two is in series ice-melt mode；, will be extra-high in the present embodiment in the present embodiment
The ice melting current that the output end voltage of line ball road deicing device 1 divided by two resistance being in series are obtained is 9500A, less than all banyan lines
The minimum ice melting current 10000A of wire, wire is using two and a string of ice-melt mode；
5）The output voltage positive-negative polarity of three output ends of two turn of three switching device 2 is controlled according to wire ice-melt mode；
Wire is using two and a string of ice-melt mode in the present embodiment, therefore utilizes two turn of three switching device 2 of Rong Cheng transformer stations that B phases is defeated
Go out " ﹢ " pole tension, A, C phase export " ﹣ " pole tension；
6）Put into extra high voltage line deicing device 1, A, B, C three-phase conducting wire ice-melt to extra-high voltage all banyan lines；
7）Cut off extra high voltage line deicing device 1, two turn of three switching device 2, wire ice-melt access device 6, wire ice-melt
Short-circuiting means 7, determines the ground wire short circuit mode of two ground wires, ground wire short circuit mode include two ground wires series connection short circuit mode and
The short circuit mode of single ground wire series connection B phase conductors；In the present embodiment, the output end voltage of extra high voltage line deicing device 1 is removed
The ice melting current that the resistance connected using two ground wires is obtained is 320A, less than the minimum ice melting current 450A of all banyan line ground wires, ground
Line uses the short circuit mode of single ground wire series connection B phase conductors；
8）Ground wire deicing short-circuiting means 8 is controlled to connect the ground wire of extra-high voltage all banyan lines according to the ground wire short circuit mode of determination
Ground；In the present embodiment, be specifically away from utilization ground wire deicing short-circuiting means 8 Rong Cheng transformer stations 180km at by the first ground wire or the
Two ground wires access the device with B phase conductors and realize short circuit；
9）Ground wire is accessed by three-phase bus 3 according to ground wire short circuit mode；In the present embodiment, ground wire is connected using single ground wire
The short circuit mode of B phase conductors, therefore the first ground wire deicing access device 4 of input and wire ice-melt access device 6, ground wire is accessed
Three-phase bus 3；
10）The output voltage positive-negative polarity of three output ends of two turn of three switching device 2 is controlled according to ground wire short circuit mode；
In the present embodiment, ground wire uses the short circuit mode of single ground wire series connection B phase conductors, therefore utilizes two turn of three switching device 2 by A phases
" ﹢ " pole tension is exported, B phases export " ﹣ " pole tension；
11）Extra high voltage line deicing device 1 is put into, the output voltage of extra high voltage line deicing device 1 is automatically accessed into spy
The ground wire of high pressure all banyan lines realizes the ice-melt to extra-high voltage all ground wires of banyan line；
12）After the completion of ice-melt, excision extra high voltage line deicing device 1, two turn of three switching device 2, the first ground wire deicing
Access device 4, the second ground wire deicing access device 5, wire ice-melt access device 6, wire ice-melt short-circuiting means 7 and ground wire deicing
Short-circuiting means 8, exits ice-melt；In the present embodiment, Rong Cheng transformer stations excision extra high voltage line deicing device 1, two turn of three switching dress
The 2, first ground wire deicing access device 4, wire ice-melt access device 6 are put, deicing device is exited, away from Rong Cheng transformer stations 180km
Place's excision ground wire deicing short-circuiting means 8；
13）The extra-high voltage all three-phase conducting wire of banyan line, the power supply of ground wire are closed respectively, recover the normal of extra-high voltage all banyan lines
Power supply.
Described above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (7)
1. a kind of automatic ice melting method based on extra high voltage line ice melting system, the extra high voltage line ice melting system includes extra-high
Line ball road deicing device（1）, two turn of three switching device（2）, three-phase bus（3）, the first ground wire deicing access device（4）, second
Ground wire deicing access device（5）, wire ice-melt access device（6）, wire ice-melt short-circuiting means（7）With ground wire deicing short-circuiting means
（8）, two turn of three switching device（2）Two inputs and extra high voltage line deicing device（1）Output end be connected, it is described
Two turn of three switching device（2）Three output ends respectively and three-phase bus（3）In a phase bus be connected, the three-phase bus（3）
Each mutually pass through wire ice-melt access device respectively（6）With treat that each of ice-melt extra high voltage line be connected, and the three-phase bus
（3）A phases pass through the first ground wire deicing access device（4）, treat ice-melt extra high voltage line the first ground wire and ground wire deicing short circuit
Device（8）It is connected, the three-phase bus（3）C phases pass through the second ground wire deicing access device（5）, treat ice-melt extra high voltage line
The second ground wire and ground wire deicing short-circuiting means（8）It is connected, the ground wire deicing short-circuiting means（8）Also with treating the extra-high line ball of ice-melt
The single-phase transmission line on road is connected, it is characterised in that step includes：
1）It will treat that the three-phase conducting wire of ice-melt extra high voltage line, the power supply of ground wire are pulled open, the ground wire for treating ice-melt extra high voltage line
Including the first ground wire and the second ground wire；
2）Cut off extra high voltage line deicing device（1）, two turn of three switching device（2）, the first ground wire deicing access device（4）,
Two ground wire deicing access devices（5）, wire ice-melt access device（6）With ground wire deicing short-circuiting means（8）, put into wire ice-melt short
Road device（7）A, B, C three-phase conducting wire short circuit of ice-melt extra high voltage line will be treated；
3）Put into wire ice-melt access device（6）, A, B, C three-phase conducting wire for treating ice-melt extra high voltage line are accessed into three-phase bus
（3）；
4）The wire ice-melt mode of ice-melt extra high voltage line is treated in selection, and the wire ice-melt mode is in series ice-melt mode including two
With two and a string of ice-melt mode；
5）Two turn of three switching device is controlled according to wire ice-melt mode（2）Three output ends output voltage positive-negative polarity；
6）Put into extra high voltage line deicing device（1）, treat A, B, C three-phase conducting wire ice-melt of ice-melt extra high voltage line；
7）Cut off extra high voltage line deicing device（1）, two turn of three switching device（2）, wire ice-melt access device（6）, wire melts
Ice short-circuiting means（7）, determine the ground wire short circuit mode of two ground wires, the ground wire short circuit mode includes the short of two ground wires series connection
Connect the short circuit mode of mode and single ground wire series connection B phase conductors；
8）Ground wire deicing short-circuiting means is controlled according to the ground wire short circuit mode of determination（8）The ground wire for treating ice-melt extra high voltage line connects
Ground；
9）Ground wire is accessed by three-phase bus according to ground wire short circuit mode（3）；
10）Two turn of three switching device is controlled according to ground wire short circuit mode（2）Three output ends output voltage positive-negative polarity；
11）Put into extra high voltage line deicing device（1）, by extra high voltage line deicing device（1）Output voltage automatically access and treat
The ground wire of ice-melt extra high voltage line realizes the ice-melt for the ground wire for treating ice-melt extra high voltage line；
12）After the completion of ice-melt, extra high voltage line deicing device is cut off（1）, two turn of three switching device（2）, the first ground wire deicing
Access device（4）, the second ground wire deicing access device（5）, wire ice-melt access device（6）, wire ice-melt short-circuiting means（7）With
Ground wire deicing short-circuiting means（8）, exit ice-melt；
13）It will treat that the three-phase conducting wire of ice-melt extra high voltage line, the power supply of ground wire close respectively, recover normal power supply.
2. the automatic ice melting method of extra high voltage line ice melting system according to claim 1, it is characterised in that the step
4）Detailed step include：The electricity being in series according to the resistance calculations two for the three-phase conducting wire single-phase transmission line for treating ice-melt extra high voltage line
Resistance, described two resistance being in series are twice of the resistance of single-phase transmission line, by extra high voltage line deicing device（1）Output end electricity
Pressure divided by two resistance being in series obtain ice melting current, if ice melting current is more than or equal to the three-phase for treating ice-melt extra high voltage line
The minimum ice melting current of wire, then it is preferential to be in series ice-melt mode using two；Otherwise, if ice melting current, which is less than, treats that ice-melt is extra-high
The minimum ice melting current of the three-phase conducting wire on line ball road, then using two and a string of ice-melt mode.
3. the automatic ice melting method of extra high voltage line ice melting system according to claim 1, it is characterised in that the step
5）Detailed step include：Judge the type of wire ice-melt mode, if wire ice-melt mode is two to be in series ice-melt mode,
Control two turn of three switching device（2）The output voltages of A phase output terminals be that positive polarity, the output voltage of C phase output terminals are negative pole
Property；If wire ice-melt mode is the ice-melt mode of two and a string, two turn of three switching device is controlled（2）B phase output terminals
Output voltage is that positive polarity, the output voltage of A phase output terminals are that negative polarity, the output voltage of C phase output terminals are negative polarity.
4. the automatic ice melting method of extra high voltage line ice melting system according to claim 1, it is characterised in that the step
7）The middle detailed step for determining ground wire short circuit mode includes：According to the resistance calculations two for the single ground wire for treating ice-melt extra high voltage line
The resistance of root ground wire series connection, the resistance of two ground wires series connection is twice of the resistance of single ground wire, and extra high voltage line is melted
Ice production apparatus（1）Output end voltage divided by the resistance of two ground wires series connection obtain ice melting current, if ice melting current is more than or waited
In the minimum ice melting current for the single ground wire for treating ice-melt extra high voltage line, then preferentially using the short circuit mode of two ground wires series connection；
Otherwise, if ice melting current is less than the minimum ice melting current for the single ground wire for treating ice-melt extra high voltage line, using single ground wire
The short circuit mode of series connection B phase conductors.
5. the automatic ice melting method of extra high voltage line ice melting system according to claim 1, it is characterised in that the step
8）In pass through ground wire deicing short-circuiting means（8）According to the ground wire short circuit mode of determination control two it is ground wire grounded when, if it is determined that
Ground wire short circuit mode be the short circuit mode of two ground wires series connection, then the first ground wire in two ground wires and the second ground wire are accessed
Ground wire deicing short-circuiting means（8）Realize short circuit；If it is determined that ground wire short circuit mode for single ground wire connect B phase conductors short circuit
Mode, then access ground wire deicing short-circuiting means by the first ground wire in two ground wires or the second ground wire（8）Realize short circuit.
6. the automatic ice melting method of extra high voltage line ice melting system according to claim 1, it is characterised in that the step
9）Ground wire is accessed by three-phase bus according to ground wire short circuit mode（3）When, if ground wire short circuit mode is the short of two ground wires series connection
Mode is connect, then puts into the first ground wire deicing access device（4）With the second ground wire deicing access device（5）；If ground wire short circuit side
Formula is the short circuit mode of single ground wire series connection B phase conductors, and the access of the first ground wire deicing is put into when selecting ground wire to be the first ground wire
Device（4）With wire ice-melt access device（6）, the second ground wire deicing access device is put into when selecting ground wire to be the second ground wire
（5）With wire ice-melt access device（6）.
7. the automatic ice melting method of extra high voltage line ice melting system according to claim 1, it is characterised in that the step
10）Detailed step include：Judge the type of ground wire short circuit mode, if it is determined that ground wire short circuit mode be the series connection of two ground wires
Short circuit mode, then control two turn of three switching device（2）A phase output terminals output voltage for positive polarity, C phase output terminals it is defeated
Go out voltage for negative polarity；Connected the short circuit modes of B phase conductors if ground wire short circuit mode is single ground wire, when selection ground wire is the
Two turn of three switching device is then controlled during one ground wire（2）A phase output terminals output voltage be positive polarity, the output of B phase output terminals
Voltage is negative polarity, and two turn of three switching device is then controlled when selecting ground wire to be the second ground wire（2）C phase output terminals output electricity
Pressure is that positive polarity, the output voltage of B phase output terminals are negative polarity.
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| CN109149493B (en) * | 2018-10-12 | 2020-01-31 | 四川大学 | Heating control equipment and control method for multi-strand insulation self-heating overhead ground wire |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2376692C1 (en) * | 2008-06-09 | 2009-12-20 | Открытое акционерное общество "Научно-исследовательский институт по передаче электроэнергии постоянным током высокого напряжения" (ОАО "НИИПТ") | Combined plant for glase ice and reactive power compensation |
| CN103368122A (en) * | 2013-06-21 | 2013-10-23 | 国家电网公司 | Ground wire direct current-based deicing automatic wiring system |
| CN205863868U (en) * | 2016-07-25 | 2017-01-04 | 国网湖南省电力公司 | A kind of extra high voltage line ice melting system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2376692C1 (en) * | 2008-06-09 | 2009-12-20 | Открытое акционерное общество "Научно-исследовательский институт по передаче электроэнергии постоянным током высокого напряжения" (ОАО "НИИПТ") | Combined plant for glase ice and reactive power compensation |
| CN103368122A (en) * | 2013-06-21 | 2013-10-23 | 国家电网公司 | Ground wire direct current-based deicing automatic wiring system |
| CN205863868U (en) * | 2016-07-25 | 2017-01-04 | 国网湖南省电力公司 | A kind of extra high voltage line ice melting system |
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