CN108092182A - Ultra-high-tension power transmission line is segmented de-icing method and system - Google Patents
Ultra-high-tension power transmission line is segmented de-icing method and system Download PDFInfo
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- CN108092182A CN108092182A CN201711463777.1A CN201711463777A CN108092182A CN 108092182 A CN108092182 A CN 108092182A CN 201711463777 A CN201711463777 A CN 201711463777A CN 108092182 A CN108092182 A CN 108092182A
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- ice
- melt
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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
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
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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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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
- Suspension Of Electric Lines Or Cables (AREA)
Abstract
The present invention discloses the segmentation de-icing method and system of a kind of ultra-high-tension power transmission line, it is primarily characterized in that one end of icing section in the line sets segmentation disconnecting link, the low-pressure side bus voltage of circuit one end substation is transported to circuit breakpoint by the non-icing section of multiplexel circuit, and alternating current input power supplying is provided for the DC de-icing device configured in waypoint, it re-covers stade to circuit again after deicing device converts and implements cocurrent flow ice-melt.This method can realize the specific aim ice-melt only to re-covering stade in transmission line of electricity, and deicing device capacity requirement can be greatly decreased, so as to reduce the construction difficulty of ice-melt engineering and cost；And provide deicing device inputing power using substation, the shortcomings that avoiding using ice-melt capacity during mobile generator power supply and ice-melt length limited, the feature that achievable ice-melt capacity re-covers stade according to circuit is freely matched, so as to meet the segmentation ice-melt demand that stade is re-covered to different length.
Description
Technical field
The invention belongs to the grid power transmission circuit clearing ice technology field in electrical engineering more particularly to a kind of high voltage transmission lines
Road is segmented de-icing method and system.
Background technology
China's ice disaster takes place frequently, and broken string bar, the safety fortune of serious threat to power grid are easily caused after powerline ice-covering
Row and power supply reliability.For this purpose, various types of deicing devices are developed both at home and abroad, by applying larger current to icing circuit
Make its fever to melt icing, so as to prevent the generation for the line-outage contingency of falling tower.
At present when implementing ice-melt to major network transmission line of electricity using deicing device, all fronts ice-melting mode is generally used：Work as
When certain section of icing reaches a certain level in circuit, regardless of icing segment length, all to the through-flow ice-melt of whole circuit.Due to master
Net transmission line of electricity distance, line footpath are thick, and the capacity of power supply and deicing device is big during the ice-melt of all fronts, it is difficult, of high cost to build,
The serious popularization and application for constraining de-icing technology.On the other hand, line ice coating is generally in the local mima type microrelief region such as mountain top, lake
Just more serious, the ice-melt capacity of the overwhelming majority, which expends, during the ice-melting mode of all fronts is being not required to the light icing of ice-melt or without icing line segment
On, cause ice-melt waste of capacity.If implementing selective ice-melt (being referred to as segmented ice-melt) using stade is only re-covered to circuit,
It is remarkably improved the specific aim and economy of de-icing technology application.This requires deicing device should be from one end access for re-covering stade
Circuit, but existing major network deicing device is all to take electric Model Design according to configuration in substation and from substation, can not be applicable in
In segmentation ice-melting mode of the deicing device away from substation.
At present, in agriculture distribution line ice-melt, having some can be implemented with the DC de-icing device for carrying generator powered
It is segmented ice-melt.For example patent [CN201210177344] discloses a kind of utilize by the portable super of intermediate-frequengasoline gasoline generator powered
Short distance agriculture distribution DC de-icing device any point can access in agriculture distribution line, once can be to the number in agriculture distribution line
Implement segmentation ice-melt in hundred rice noodles sections；Patent [CN200920064715] discloses a kind of 10kV to power using mobile generator
Agriculture distribution DC de-icing device can implement ice-melt to part of path in the kilometer range in 10kV transmission lines of electricity.But these devices
Both for line footpath is thin, ice melting current is small, ice-melt capacity is small, the class of insulation is low, the convenient agriculture distribution line of ice-melt patch,
And it can not be suitable for that ice melting current be up to thousands of peaces, insulation voltage is up to hundreds of kilovolts of major network transmission line of electricity.
The content of the invention
Present invention aims at disclose a kind of ultra-high-tension power transmission line segmentation de-icing method and system, to solve tradition completely
The problem of installed capacity is big, of high cost under ice-melting mode, deicing device when particularly solving to major network line sectionalizing ice-melt
The shortcomings that powering problem, avoiding ice-melt capacity and ice-melt length limited when powering using mobile generator so that segmentation ice-melt
Single ice-melt length can on demand be configured according to the feature for re-covering stade.
To achieve the above object, solution proposed by the present invention is a kind of ultra-high-tension power transmission line segmentation de-icing method,
Disjunction is attached most importance to icing section and non-icing section between being mainly characterized by the line, by the low-pressure side bus electricity of circuit one end substation
Pressure is transported to circuit breakpoint by the non-icing section of multiplexel circuit, and the deicing device to configure in waypoint provides exchange input
Power supply again re-covers circuit after deicing device converts stade and implements ice-melt.Its step is,
A) one end of icing section sets breakpoint and other end three-phase short circuit in transmission line of electricity, so as to will be in transmission line of electricity
Icing Duan Yuwei icing sections separate；
B) transmission line of electricity one end from original substation's high voltage bus is disconnected, and is connected on substation's low-voltage bus bar；
C deicing device) is configured in circuit waypoint, deicing device input side is connected to the non-icing line of waypoint one side
On the road, deicing device outlet side is connected on the icing circuit of waypoint opposite side；
D) substation's low voltage is transported to line sectionalizing point by the non-icing section of multiplexel circuit, and electricity is provided for deicing device
Can, then by deicing device ice melting current is provided to line ice coating section.
The corresponding segmentation ice melting system of the above method includes：It is connected to the line segregation of substation's high voltage bus, is connected to
The ice-melt interval of substation's low-voltage bus bar, transmission line of electricity, deicing device power supply disconnecting link, circuit disjunction disconnecting link, ice-melt access disconnecting link,
Deicing device, ice-melt short circuit disconnecting link, the offside line segregation for being connected to offside substation.Its connection mode is：
A) output terminal of the line segregation is in parallel with the output terminal at ice-melt interval, is all connected to one end of transmission line of electricity；
B) output terminal of offside line segregation is connected to the other end of transmission line of electricity；
C) deicing device power supply disconnecting link, circuit disjunction disconnecting link, ice-melt access disconnecting link three are all disposed within weight in transmission line of electricity
One end of icing section, wherein circuit disjunction disconnecting link are connected in transmission line of electricity is divided into two sections by circuit；
D) one end of deicing device power supply disconnecting link is connected to the non-icing side of transmission line of electricity, and the other end is connected to deicing device
Input side；
E) one end of ice-melt access disconnecting link is connected to the icing side of transmission line of electricity, and the other end is connected to the output of deicing device
Side；
F) ice-melt short circuit disconnecting link is connected in the three-phase line that transmission line of electricity re-covers ice end end in parallel.
Preferably, the deicing device in foregoing segmentation ice melting system uses DC de-icing device.
The invention has the advantages that：
1) the specific aim ice-melt only to re-covering stade in transmission line of electricity can be achieved, compared with all fronts ice-melt, can be greatly decreased
Deicing device capacity requirement, so as to reduce the construction difficulty of ice-melt engineering and cost.
2) voltage and current of low voltage grade is conveyed temporarily using the non-icing road of major network circuit, so as to be deicing device
Power supply, this with Mobile power generation vehicle or newly-increased supply line there is no need to be powered, so as to save power supply cost；Simultaneously because
The power supply capacity of which is strong, it can be achieved that the feature that ice-melt capacity re-covers stade according to circuit is freely matched, so as to meet to not
The segmentation ice-melt demand of stade is re-covered with length.
3) device accesses at the disconnecting link reserved during ice-melt field conduct, reduces field connection work, improves work
Make efficiency.
4) autgmentability is strong.Based on this method, it can will also re-cover stade and be decomposed into piecewise ice-melt after several segments again, thus into
One step reduces ice-melt capacity.
Description of the drawings
The attached drawing for forming the part of the application is used for providing a further understanding of the present invention, schematic reality of the invention
Example and its explanation are applied for explaining the present invention, is not constituted improper limitations of the present invention.In the accompanying drawings：
Fig. 1 is segmentation ice melting system structure chart disclosed by the embodiments of the present invention.
Fig. 2 is traditional ultra-high-tension power transmission line all fronts ice melting system structure chart.
Specific embodiment
The embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention can be defined by the claims
Implement with the multitude of different ways of covering.
The present embodiment discloses a kind of ultra-high-tension power transmission line segmentation ice melting system first, as shown in Figure 1, including：
By the line segregation 1 for being connected to substation's high voltage bus, the ice-melt interval 2, defeated that is connected to substation's low-voltage bus bar
Electric line 3, deicing device power supply disconnecting link 4, circuit disjunction disconnecting link 5, ice-melt access disconnecting link 6, deicing device 7, ice-melt short circuit disconnecting link
8th, the offside line segregation 9 for being connected to offside substation is formed.Wherein, line segregation 1 and ice-melt interval 2 are all conventional configurations,
Generally comprise corresponding breaker, bus bar side disconnecting link, line side disconnecting link.Line segregation 1 and the line side disconnecting link at ice-melt interval 2 are all
It is connected to transmission line of electricity one end；Deicing device power supply disconnecting link 4, circuit disjunction disconnecting link 5, ice-melt access disconnecting link 6, deicing device 7, melt
The position of 8 grade components of ice short circuit disconnecting link is configured according to the exemplary distribution rule for re-covering stade, can be distributed in and be re-covered stade
Both ends, wherein deicing device power supply disconnecting link 4 and circuit disjunction disconnecting link 5 and deicing device 7 are distributed again close be configured between ice-melt
Every one end, and ice-melt access disconnecting link 6, ice-melt short circuit disconnecting link 8 are configured in the other end.
Further, each functional component shown in FIG. 1 is described below：
Line segregation 1 and offside substation line interval 9 are the switchgears at circuit both ends, generally include corresponding open circuit
Device, bus bar side disconnecting link, line side disconnecting link, are used to implement circuit normal operation.
Ice-melt interval 2 is the switchgear needed for for power grid extraction ice-melt power supply, is needing the substation of ice-melt
Whether use all fronts ice-melt or being segmented ice-melt can all configure.
Easy icing transmission line of electricity 3 is ice-melt object, and the icing for needing ice-melt can be divided into according to icing degree or ice-melt demand
Section and be not required ice-melt non-icing section (in terms of ice-melt angle, be not required ice-melt light icing section can be equal to non-icing section；With
It is corresponding, for ease of distinguish, subsequent descriptions again by icing section be known as " re-covering stade ").
Deicing device power supply disconnecting link 4 is for connecting or disconnecting the input side of deicing device with transmission line of electricity, in the ice-melt phase
Between the disconnecting link be closed rather than ice-melt during the disconnecting link disconnect.
Circuit disjunction disconnecting link 5 is used to disconnect transmission line of electricity in waypoint during ice-melt, in order to which disconnecting link both sides can flow
The disconnecting link, which is closed, during crossing different voltage and currents rather than ice-melt ensures circuit normal transmission.
Ice-melt access disconnecting link 6, should during ice-melt for connecting or disconnecting the outlet side of deicing device with transmission line of electricity
Disconnecting link is closed to be disconnected so that deicing device output voltage electric current is introduced into the disconnecting link during re-covering ice circuit rather than ice-melt.
It is direct current to carry out DC ice melting that deicing device 7, which is used for the three-phase alternating current Electrical change that provides power grid,；
Ice-melt short circuit disconnecting link 8 is used for the short dot three-phase short circuit of setting during ice-melt to form ice melting current circuit,
It is closed during ice-melt and is disconnected in non-ice-melt.
It is by being multiplexed the non-icing section of major network transmission line of electricity, substation low-voltage side is female based on ice melting system shown in FIG. 1
Line voltage is transported to the breakpoint that stade is re-covered in circuit, so as to provide alternating current input power supplying for deicing device.Corresponding diagram 1
Operation principle be specially：
First, when being not required to ice-melt, circuit disjunction disconnecting link 5 is closed, and ice-melt interval 2, deicing device power supply disconnecting link 4, ice-melt connect
Enter disconnecting link 6, ice-melt short circuit disconnecting link 8 disconnects, deicing device 7 is arranged at disjunction or other positions.Transmission line of electricity is routinely at this time
Mode is run, for example line segregation 1 and offside line segregation 9 are all closed, then the normal transmission power of transmission line of electricity.
2nd, when certain section in transmission line of electricity 3 occurs serious icing and there is the broken string of falling tower risk, then perform successively following
Operation：
First, transmission line of electricity 3 has a power failure, i.e. open-circuit line interval 1 and offside line segregation 9, makes the no longer band of transmission line of electricity 3
There is high voltage.
Secondly, open-circuit line disjunction disconnecting link 5 makes both sides electrical isolation in order to which both sides is allowed to can flow through different voltage electricity
Stream.
Again, deicing device field connection is connected respectively to the ac input end and DC output end of deicing device 7
Deicing device power supply disconnecting link 4 and ice-melt access disconnecting link 6.
Then, DC ice-melting is treated in deicing device access, that is, is closed deicing device power supply disconnecting link 4, ice-melt access disconnecting link 6, is melted
Ice short circuit disconnecting link 8.
Finally, it is closed ice-melt interval and implements DC ice melting.The input side of deicing device 7 is connected through non-icing part of path at this time
To the low-voltage bus bar of substation, so as to obtain power supply；Specific direct current is exported after the ac-dc conversion in deicing device
Voltage, then its DC output side through ice-melt access disconnecting link 6 be connected to icing line segment and through 8 three-phase short circuit of ice-melt short circuit disconnecting link
To form ice melting current circuit, the electric current in power transmission line section is regulated and controled within the specific limits by the inside of deicing device 7, from
And realize the segmentation ice-melt of counterweight icing section.
In said program, the power supply of deicing device is to convey the relatively low voltage of voltage class temporarily by major network transmission line of electricity
Electric current.Since major network circuit has the inherent characteristic that dielectric level is high, through-current capability is strong, thus it is defeated during its natural satisfaction segmentation ice-melt
Send low pressure, the power demands of low current, that is to say, that the pressure-resistant current capacity of original circuit need not be increased.Meanwhile because of ice-melt
Device is to take electricity and through major network multi-line power transmission from substation, and substation and major network circuit all have very strong power supply capacity, because
This segmentation ice-melt capacity may be up to tens of megawatts, can meet the ice-melt that ice part of path is re-covered to relatively long distance (such as tens of kms)
Demand.
Compared with traditional ultra-high-tension power transmission line all fronts ice melting system, as shown in Fig. 2, this segmentation DC ice-melting is in structure
Improvement essentially consist in；
1) the configuration place of deicing device is had been moved to from substation among circuit, while ice-melt short circuit point is also another from circuit
One side substation is moved on among circuit, so only can implement ice-melt to circuit partial section；
2) major network transmission line of electricity is being re-covered into the disjunction of stade one end, so that the weight of larger DC current will be flowed through in ice-melt
Icing section comes with the non-icing section electrical isolation for flowing only through smaller alternating current.
3) in the line between access set can with major network transmission line wire be electrically connected deicing device power supply disconnecting link and
Deicing device accesses disconnecting link, in order to the field connection being segmented when ice-melt is implemented.
To sum up, the ultra-high-tension power transmission line segmentation de-icing method disclosed in the embodiment of the present invention, step are,
A) one end of icing section sets breakpoint and other end three-phase short circuit in transmission line of electricity, so as to will be in transmission line of electricity
Icing Duan Yuwei icing sections separate；
B) transmission line of electricity one end from original substation's high voltage bus is disconnected, and is connected on substation's low-voltage bus bar；
C deicing device) is configured in circuit waypoint, deicing device input side is connected to the non-icing line of waypoint one side
On the road, deicing device outlet side is connected on the icing circuit of waypoint opposite side；
D) substation's low voltage is transported to line sectionalizing point by the non-icing section of multiplexel circuit, and electricity is provided for deicing device
Can, then by deicing device ice melting current is provided to line ice coating section.
It is corresponding, a kind of ultra-high-tension power transmission line segmentation de-icing method for realizing that system is as shown in Figure 1 based on the above method
Segmentation ice melting system, including being connected to the line segregation 1 of substation's high voltage bus, being connected to the ice-melt of substation's low-voltage bus bar
Interval 2, transmission line of electricity 3, deicing device power supply disconnecting link 4, circuit disjunction disconnecting link 5, ice-melt access disconnecting link 6, deicing device 7, ice-melt
Short circuit disconnecting link 8, the offside line segregation 9 for being connected to offside substation；Its connection mode is：
A) output terminal of the line segregation 1 is in parallel with the output terminal at ice-melt interval 2, is all connected to the one of transmission line of electricity 3
End；
B) output terminal of offside line segregation 9 is connected to the other end of transmission line of electricity 3；
C) deicing device power supply disconnecting link 4, circuit disjunction disconnecting link 5, ice-melt access disconnecting link 6 are all disposed within weight in transmission line of electricity 3
One end of icing section, wherein circuit disjunction disconnecting link 5 are connected in transmission line of electricity 3 circuit being divided into two sections；
D) one end of deicing device power supply disconnecting link 4 is connected to the non-icing side of transmission line of electricity, and the other end is connected to ice-melt dress
Put 7 input side；
E) one end of ice-melt access disconnecting link 6 is connected to the icing side of transmission line of electricity, and the other end is connected to the defeated of deicing device 7
Go out side；
F) ice-melt short circuit disconnecting link 8 is connected in the three-phase line that transmission line of electricity re-covers ice end end in parallel.
Thereby, ultra-high-tension power transmission line segmentation de-icing method and system disclosed in the present embodiment, have the advantages that：
1) the specific aim ice-melt only to re-covering stade in transmission line of electricity can be achieved, compared with all fronts ice-melt, can be greatly decreased
Deicing device capacity requirement, so as to reduce the construction difficulty of ice-melt engineering and cost.
2) voltage and current of low voltage grade is conveyed temporarily using the non-icing road of major network circuit, so as to be deicing device
Power supply, this with Mobile power generation vehicle or newly-increased supply line there is no need to be powered, so as to save power supply cost；Simultaneously because
The power supply capacity of which is strong, it can be achieved that the feature that ice-melt capacity re-covers stade according to circuit is freely matched, so as to meet to not
The segmentation ice-melt demand of stade is re-covered with length.
3) device accesses at the disconnecting link reserved during ice-melt field conduct, reduces field connection work, improves work
Make efficiency.
4) autgmentability is strong.Based on this method, it can will also re-cover stade and be decomposed into piecewise ice-melt after several segments again, thus into
One step reduces ice-melt capacity.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.
Claims (2)
1. a kind of ultra-high-tension power transmission line is segmented de-icing method, step is,
A) one end of icing section sets breakpoint and other end three-phase short circuit in transmission line of electricity, so as to by covering in transmission line of electricity
Stade is separated with non-icing section；
B) transmission line of electricity one end from original substation's high voltage bus is disconnected, and is connected on substation's low-voltage bus bar；
C deicing device) is configured in circuit waypoint, deicing device input side is connected to the non-icing circuit of waypoint one side
On, deicing device outlet side is connected on the icing circuit of waypoint opposite side；
D) substation's low voltage is transported to line sectionalizing point by the non-icing section of multiplexel circuit, and electric energy is provided for deicing device, then
By deicing device ice melting current is provided to line ice coating section.
2. a kind of segmentation ice melting system for being applied to ultra-high-tension power transmission line segmentation de-icing method described in claim 1, feature exist
In including the line segregation (1) for being connected to substation's high voltage bus, the ice-melt interval (2), defeated that is connected to substation's low-voltage bus bar
Electric line (3), deicing device power supply disconnecting link (4), circuit disjunction disconnecting link (5), ice-melt access disconnecting link (6), deicing device (7), melt
Ice short circuit disconnecting link (8), the offside line segregation (9) for being connected to offside substation；Its connection mode is：
A) output terminal of the line segregation (1) is in parallel with the output terminal of ice-melt interval (2), is all connected to transmission line of electricity (3)
One end；
B) output terminal of offside line segregation (9) is connected to the other end of transmission line of electricity (3)；
C) deicing device power supply disconnecting link (4), circuit disjunction disconnecting link (5), ice-melt access disconnecting link (6) are all disposed within transmission line of electricity (3)
In re-cover one end of stade, wherein circuit disjunction disconnecting link (5) is connected in transmission line of electricity (3) circuit being divided into two sections；
D) one end of deicing device power supply disconnecting link (4) is connected to the non-icing side of transmission line of electricity, and the other end is connected to deicing device
(7) input side；
E) one end of ice-melt access disconnecting link (6) is connected to the icing side of transmission line of electricity, and the other end is connected to the defeated of deicing device (7)
Go out side；
F) ice-melt short circuit disconnecting link (8) is connected in the three-phase line that transmission line of electricity re-covers ice end end in parallel.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110854738A (en) * | 2019-11-29 | 2020-02-28 | 国网湖南省电力有限公司 | Segmented ice melting method for high-voltage transmission line |
| CN111668791A (en) * | 2020-06-19 | 2020-09-15 | 南方电网数字电网研究院有限公司 | DC serial ice melting device and system |
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| CN106159861A (en) * | 2016-07-25 | 2016-11-23 | 国网湖南省电力公司 | A kind of major network movable DC ice melting device |
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| 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 |
| CN110854738A (en) * | 2019-11-29 | 2020-02-28 | 国网湖南省电力有限公司 | Segmented ice melting method for high-voltage transmission line |
| CN111668791A (en) * | 2020-06-19 | 2020-09-15 | 南方电网数字电网研究院有限公司 | DC serial ice melting device and system |
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