CN101340070A - Overhead power line capable of automatically protecting and preventing icing and automatically melting ice - Google Patents
Overhead power line capable of automatically protecting and preventing icing and automatically melting ice Download PDFInfo
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- CN101340070A CN101340070A CNA2008100870095A CN200810087009A CN101340070A CN 101340070 A CN101340070 A CN 101340070A CN A2008100870095 A CNA2008100870095 A CN A2008100870095A CN 200810087009 A CN200810087009 A CN 200810087009A CN 101340070 A CN101340070 A CN 101340070A
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- 238000002844 melting Methods 0.000 title claims abstract description 11
- 238000010257 thawing Methods 0.000 claims description 7
- 230000001681 protective effect Effects 0.000 claims description 6
- 238000005259 measurement Methods 0.000 abstract description 4
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 230000005611 electricity Effects 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000012212 insulator Substances 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 235000019994 cava Nutrition 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 241000272165 Charadriidae Species 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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Abstract
The invention relates to an overhead power line of a power grid, in particular to an overhead power line which can automatically protect and prevent icing and automatically melt ice. The structure of the system is a system which enables an overhead power line to form a short circuit, and the structure equipment comprises: the circuit temperature and humidity measurement and control device, the microcomputer processing protection system, the special relay protection device, the circuit high-voltage circuit breaker, the electric control isolating switch that can constitute short circuit between the wire, the power protection control switch, the confession is used for short-circuit current power supply unit system: high voltage DC or low voltage AC current regulation and control device, current and voltage measurement and control and regulation device, fuse, etc. The technical scheme of the invention is that the wires are directly connected without passing through a load to form a short circuit, and a power supply is added to heat the wires of the power grid so as to prevent the lines from being covered with ice and melt ice automatically. The second technical scheme is as follows: and changing the wiring mode by using the equipment in the technical scheme I, and establishing a system for automatically melting ice on the line due to ice coating.
Description
One, technical field
The present invention relates to the overhead power line of power network, particularly protect the overhead power line that prevents cover ice automatically melting automatically.
Two, background technology
At present, the overhead power line of China's power network is met wind and snow at extremely frigid zones, during sleet, the normal overhead power line icing phenomenon that takes place, because bar, tower, insulator freezes, form the circuit lost territory, the high-voltage switch gear tripping operation is sent general getting nowhere by force, along with the sleet time is of a specified duration more, and then the also serious icing of circuit, along with the icing volume increases, cause down bar, fall basic, iron tower caves in, the generation of accidents such as broken string, the heavy damage electric power facility, cause the electrical network can't normal power supply at last, even cause large-area power-cuts, power network safety operation is caused have a strong impact on, and have a strong impact on people's lives, railway traffic, industrial and agricultural production, the construction of national economy.When serious icing takes place in overhead power line, often need set out a large amount of human and material resources, recovery vehicle, a large amount of power equipment of replacing, and protect electricity, make an inspection tour, rush to repair and resume work and brought great difficulty for anti-ice, mode by artificial deicing solves, even the contingency that easily causes casualties.In 2008, in this especially big snowstorm, perhaps can cause several 10,000,000,000 yuan economic losses to national grid.
In order to solve the problem of power network overhead transmission line icing, ice-melt, the overhead power line that prevents cover ice automatically melting is protected in invention automatically hereby.The present invention involve the interests of the state and the people the influence great, the development of the national economy, national grid construction are had significant role and outstanding contribution.Use the present technique achievement in national grid is from now on built, particularly the power grid construction in high and cold sleet area is significant and acts on.
Three, summary of the invention
The technical problem to be solved in the present invention be how when the overhead power line of power network when high and cold sleet weather easily icing takes place and automatically protection prevent the problem of cover ice automatically melting, make it avoid carrying out artificial deicing and technical problem that anti-ice is protected electricity.
In order to address the above problem, the technical solution used in the present invention one is:
Its structure comprises the power network aerial condutor; also comprise the system that makes overhead power line can constitute short circuit; its structure equipment has: the warm and humid measure and control device of circuit; the MICROCOMPUTER PROCESSING protection system; special-purpose protective relaying device; the circuit beginning; the primary cut-out at whole two ends; can constitute the automatically controlled isolating switch of short circuit between lead; the power protection control switch; for being used for short circuit current supply unit system: high voltage direct current supply current regulation device or low-voltage alternating-current electric current regulation device are used for detecting automatically the current/voltage observing and controlling adjusting device of adjusting short circuit current size and elements such as the fuse composition of the rated current voltage that shields.
The technology of technical solution of the present invention one is to utilize between the lead directly to connect mutually without load to form short circuit, and in addition power supply makes the heating of electrical network lead and prevents circuit icing and automatic defrosting.Its operation principle: when temperature descends 0 ℃ or-1 ℃; in the time of-2 ℃; humidity reaches icing (definite value can be adjusted according to concrete area); shaft tower; when insulator has begun to freeze; it is icing that the warm and humid measure and control device of circuit detects overhead power line; send the chimes of doom of " overhead power line is icing " through the MICROCOMPUTER PROCESSING protection system; send by the MICROCOMPUTER PROCESSING protection system: protection starting automatically; the protective relaying device action; open-circuit line two ends primary cut-out; automatically close and form the automatically controlled isolating switch that causes phase fault; protection power control switch again closes; connect short circuit current supply unit system: high voltage direct current supply current regulation device or low-voltage alternating-current electric current regulation device; through current/voltage observing and controlling adjusting device the size that short-circuit conductors detects the regulation voltage electric current is automatically powered; make the lead heating prevent the circuit icing or carry out automatic defrosting; when the conductor temperature heating rises to 20-30 ℃ (can descend to changing according to each department temperature and adjust); the microsystem measurement and control of temperature sends " the overhead power line temperature rises to 20-30 ℃; can recover to send "; the protective relaying device action; disconnect the DC power supply protection control switch; disconnect the automatically controlled isolating switch that constitutes the lead short circuit; the circuit two ends primary cut-out that closes restored electricity in the shortest time.Like this, just can be when high and cold sleet overhead power line generation icing and get the effect that automatic protection prevents icing and automatic defrosting.Avoid causing when circuit generation icing high-voltage switch gear tripping operation, send by force when unsuccessful and bar takes place down, fall accident basic, that iron tower caves in, breaks the heavy damage electric power facility, cause large-area power-cuts, can obtain the significant role of electric power netting safe running.The present invention program one technological merit is can protect automatically to prevent the overhead power line icing, and fast automatic ice-melt restores electricity immediately behind the icing.
The technical solution used in the present invention two is:
Utilize the equipment of technical scheme one to change its mode of connection such as each wiring and bring into play its prominent stunt art effect respectively mutually, set up the system of overhead power line because of each phase automatic defrosting of icing lost territory.
The technology of technical solution of the present invention two is because of the serious icing of shaft tower, insulator and overhead power line, caused circuit lost territory, high-voltage switch gear tripping operation, sent when getting nowhere by force, utilize the circuit lost territory, primary cut-out trips, power supply in addition, by lead because of the lost territory discharge generation heating automatic defrosting over the ground that freezes.
Its operation principle: when temperature descends-2 ℃ or-3; in the time of-5 ℃; ice and snow humidity is seriously frozen; shaft tower; insulator and circuit are icing fully; when the warm and humid measure and control device of circuit detects overhead power line and has frozen; the MICROCOMPUTER PROCESSING protection system is sent " the icing lost territory of overhead power line; primary cut-out tripping operation; need carry out ice-melt and handle "; MICROCOMPUTER PROCESSING protection system starting: after the tripping operation of line electricity source primary cut-out disconnects; close because of the automatically controlled isolating switch of each lost territory phase of freezing; the power protection control switch of the lost territory phase of closing again; making current supply unit system: high voltage direct current supply current regulation device or low-voltage alternating-current electric current regulation device; automatically detecting adjusting size of current voltage height through supply voltage observing and controlling adjusting device powers to lead; circuit rises conductor temperature because of freeze lost territory or short circuit produce heating; carry out ice-melt fast automatically; insulation recovery is normal; current/voltage observing and controlling this moment adjusting device detects electric current and can descend; reduce to little electric current from big electric current; the microsystem measurement and control of temperature sends " the overhead power line temperature rises; insulation recovery is normal; can power "; each phase power protection control switch of automatic disconnection; disconnect each mutually automatically controlled isolating switch; the action of circuit primary cut-out reclosing, reclosing successfully restores electricity.The present invention program two technological merit is to prolong power-on time as far as possible, send by force until tripping operation and carries out automatic defrosting rapidly after unsuccessful and handle, and can avoid artificial deicing, the effect that circuit is restored electricity fast.
Four, description of drawings
Concrete structure of the present invention is provided by the following drawings.
Fig. 1 is the organigram that the automatic protection of the proposition according to the present invention prevents the overhead power line technical scheme one of cover ice automatically melting.
Fig. 2 is the organigram that the automatic protection of the proposition according to the present invention prevents the overhead power line technical scheme two of cover ice automatically melting.
Sign in the accompanying drawing is represented respectively:
1, built on stilts electrical lead 2, warm and humid measure and control device 3, MICROCOMPUTER PROCESSING protection system 4, protective relaying device 5, circuit primary cut-out 6, automatically controlled isolating switch 7, power protection control switch 8, supply unit system: high voltage direct current supply current regulation device or low-voltage alternating-current electric current regulation device 9, current/voltage observing and controlling adjusting device 10, fuse
Five, embodiment
The present invention increases the warm and humid measure and control device of circuit in the equipment of original overhead power line; the MICROCOMPUTER PROCESSING protection system; automatically controlled isolating switch; special-purpose protective relaying device; current/voltage observing and controlling adjusting device; circuit beginning, whole two ends circuit breaker, specialize in the supply unit system: high voltage direct current supply current regulation device or low-voltage alternating-current electric current regulation device, power protection control switch have reached the elements such as fuse of protection short circuit power supply and just can implement.The technology of the present invention cost cost is low, but action value is great.
Claims (3)
1; a kind of automatic protection prevents the overhead power line of cover ice automatically melting; its structure comprises power network aerial condutor [1]; it is characterized in that it also comprises the system that makes overhead power line can constitute short circuit; its structure equipment has: the warm and humid measure and control device of circuit [2]; MICROCOMPUTER PROCESSING protection system [3]; special-purpose protective relaying device [4]; the circuit beginning; the primary cut-out [5] at whole two ends; automatically controlled isolating switch [6]; power protection control switch [7]; supply unit system: high voltage direct current supply current regulation device or low-voltage alternating-current electric current regulation device [8]; be used for detecting automatically the current/voltage observing and controlling adjusting device [9] of regulation voltage size of current, the fuse elements such as [10] of the rated current that shields voltage is formed.
2, protect the overhead power line that prevents cover ice automatically melting automatically; its structure comprises power network aerial condutor [1]; it is characterized in that it utilizes 1 structure equipment: elements such as [2], [3], [4], [5], [6], [7], [8], [9], [10] change its mode of connection, set up the system of overhead power line because of icing lost territory phase automatic defrosting.
3, protect the overhead power line that prevents cover ice automatically melting automatically; its structure comprises power network aerial condutor [1]; also comprise structure equipment: elements such as [2], [3], [4], [5], [6], [7], [8], [9], [10]; it is characterized in that the mode of connection that its employing mixes, form the system that reaches overhead power line short circuit or lost territory.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100870095A CN101340070A (en) | 2008-01-22 | 2008-01-22 | Overhead power line capable of automatically protecting and preventing icing and automatically melting ice |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100870095A CN101340070A (en) | 2008-01-22 | 2008-01-22 | Overhead power line capable of automatically protecting and preventing icing and automatically melting ice |
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| Publication Number | Publication Date |
|---|---|
| CN101340070A true CN101340070A (en) | 2009-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008100870095A Pending CN101340070A (en) | 2008-01-22 | 2008-01-22 | Overhead power line capable of automatically protecting and preventing icing and automatically melting ice |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104897214A (en) * | 2015-06-26 | 2015-09-09 | 国家电网公司 | Ice-coating and ice-melting test system for OPGW (Optical Fiber Composite Overhead Ground Wire) in natural environment |
| CN105826889A (en) * | 2015-01-08 | 2016-08-03 | 罗日成 | Transmission line charged segmented DC ice melting method |
| CN105849999A (en) * | 2013-10-04 | 2016-08-10 | 魁北克水电公司 | Switching apparatus and method for varying an impedance of a phase line of a segment of an electrical power line |
-
2008
- 2008-01-22 CN CNA2008100870095A patent/CN101340070A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105849999A (en) * | 2013-10-04 | 2016-08-10 | 魁北克水电公司 | Switching apparatus and method for varying an impedance of a phase line of a segment of an electrical power line |
| CN105849999B (en) * | 2013-10-04 | 2018-12-11 | 魁北克水电公司 | For changing the switchgear and method of the impedance of the phase line of power circuit section |
| CN105826889A (en) * | 2015-01-08 | 2016-08-03 | 罗日成 | Transmission line charged segmented DC ice melting method |
| CN104897214A (en) * | 2015-06-26 | 2015-09-09 | 国家电网公司 | Ice-coating and ice-melting test system for OPGW (Optical Fiber Composite Overhead Ground Wire) in natural environment |
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Open date: 20090107 |