CN106300204A - A kind of HVAC power transmission line conductor ice prevention device and combinations thereof - Google Patents
A kind of HVAC power transmission line conductor ice prevention device and combinations thereof Download PDFInfo
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- CN106300204A CN106300204A CN201610829594.6A CN201610829594A CN106300204A CN 106300204 A CN106300204 A CN 106300204A CN 201610829594 A CN201610829594 A CN 201610829594A CN 106300204 A CN106300204 A CN 106300204A
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- disconnecting switch
- inductance
- ice
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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 HVAC power transmission line conductor ice prevention device, including deicing device and high pass filter.One end A end at the ultra-high-tension power transmission line needing deicing installs deicing device, installs the second high pass filter of ground connection at other end B end；Deicing device includes inductance L1, electric capacity C, electric capacity C2, high frequency power module, high frequency transformer T and the first high pass filter；High frequency power module passes sequentially through high frequency transformer T and electric capacity C and accesses in HVAC power transmission line, and inductance L1 one end connects electric capacity C and electric capacity C2, and the other end connects the first high pass filter of ground connection.That the present invention realizes not having a power failure of HVAC power transmission line wire is anti-icing, it is to avoid the economic loss caused because of power failure；Deicing device and high pass filter are arranged on transformer station, and deicing device need not be arranged on the deicing circuit midpoint of bad environments, greatly reduces cost of installation and maintenance, has been obviously improved reliability and stability.
Description
Technical field
The present invention relates to field of power, relate to a kind of anti-icing technology of high-voltage AC transmission line.It particularly relates to one
Plant HVAC power transmission line conductor ice prevention device and combinations thereof.
Background technology
In the winter time under sleety weather, consecutive low temperature sleet and snow ice can cause the icing phenomenon in winter of transmission line of electricity.Field
Ultra-high-tension power transmission line icing easily causes various mechanical accident and electrical hazard.Therefore how to prevent field ultra-high-tension power transmission line icing
It it is the great difficult problem of power system.The heating power deicing method of main flow is by increasing the electric current in transmission line of electricity or electric current density, or increases
Add the equivalent resistance of transmission pressure, or increase current in wire and conductor resistance simultaneously, make transmission pressure self-heating, thus melt
Icing above wire.Mainly include short circuit current deicing, high frequency pumping deicing, DC current deicing, trend scheduling deicing.Its
In, short circuit current deicing, DC current deicing, trend scheduling deicing, when implementing removing ice of power transmission line, need power failure 4-8 individual little
Time/time, there is the biggest negative effect in power supply quality and economic benefit to power system.
Online high frequency ice-removing and ice-preventing method based on Kelvin effect may be implemented in line (not having a power failure) anti-icing and deicing.High-frequency and high-voltage
When excitation is applied on ice coating wire, ice coating can be made to become and to damage electrolyte and directly generate heat, also can cause the skin effect that becomes of wire
Should, make electric current only circulate at conductive surface, cause bigger equivalent resistance loss heating, thus utilize the two common heat produced
Amount deicing.It is (high that existing high frequency ice-removing and ice-preventing method can only install high-frequency and high-voltage exciting bank at the midpoint needing deicing circuit
Frequency power), wave trap (high pass filter) is installed, to control the sphere of action of high frequency electric at the two ends of circuit.And deicing line
Present position, the midpoint great majority on road are the bad environments remote districts such as forest, mountain area, lake, and construction cost is the highest, and work people
Member needs to trudge just can enter the station and operates and safeguard, labor intensity is big, in some instances it may even be possible to cause casualties；Circuit midpoint is lake
When pool, high frequency electric source cannot be built in geographic location, circuit midpoint.
Additionally, the core component of high frequency electric source-high-frequency inversion switch module uses the semiconductor powers such as IGBT, MOSFET
Device connection in series-parallel forms, and these semiconductor switch are expensive, and the construction cost of device is the highest, and the cost performance that equipment runs is very
Low.Above analytic explanation existing high frequency ice-removing and ice-preventing method does not possess good future in engineering applications.How to overcome above-mentioned asking
Topic is the direction that those skilled in the art need research.
Summary of the invention
Infield for existing high frequency ice-removing and ice-preventing device is remote, causes construction and maintenance cost the highest, operation
Personnel labor intensity is big, and response time period is long, in some instances it may even be possible to bring the problems such as life danger.The present invention proposes based on partly leading
The new type power supply with high frequency of body power device-reverse switch transistor (Reservely Switched Dynistor, RSD) is anti-icing
Device, to solve the problems referred to above.
In order to reach the purpose of the present invention, technical scheme is as follows:
A kind of HVAC power transmission line conductor ice prevention device, including deicing device and high pass filter；Described needs remove
Two end points of the single exchange wire of the transmission line of alternation current of ice are respectively side a and b, referred to as ice-melt section AB；Need deicing
The terminal A end of ice-melt section AB deicing device is installed, the terminal B end of the other end connects the second high pass filter of ground connection；Described
Deicing device includes inductance L1, electric capacity C, electric capacity C2, disconnecting switch K, disconnecting switch K4, disconnecting switch K5, disconnecting switch K6, height
Frequency power, electric capacity C3, high frequency transformer T and the first high pass filter；Described high frequency electric source passes sequentially through high frequency transformer T, electricity
Holding the input point that C, disconnecting switch K and electric capacity C2 access the A end of ice-melt section AB, one end of described electric capacity C2 connects disconnecting switch K
One end, the other end of described electric capacity C2 connects the input point of the A end of ice-melt section AB；Described inductance L1 one end connects disconnecting switch
K and the common port of electric capacity C2, the described inductance L1 other end connects disconnecting switch K4 and the common port of electric capacity C3, described electric capacity C3's
One end connects disconnecting switch K4 and the common port of inductance L1, and the other end of described electric capacity C3 connects the A end output point of ice-melt section AB,
One end of described disconnecting switch K4 connects one end of electric capacity C3, and the other end of described disconnecting switch K4 connects the first high pass filter
One end, the other end ground connection of described first high pass filter；One end of described disconnecting switch K5 connects disconnecting switch K and electric capacity
The common port of C2, the other end connects the A end output point of ice-melt section AB；One end of described second high pass filter connects disconnecting switch
One end of K6, the other end ground connection of described second high pass filter, the other end of described disconnecting switch K6 connects the B of ice-melt section AB
End.
By using this technical scheme: high frequency electric source passes sequentially through high frequency transformer T and resonant capacitance C and accesses in high pressure
In transmission line of alternation current, high frequency electric is added on power current, make effective ice-removing and ice-preventing electric current of line conductor reach or
Exceed minimum ice-removing and ice-preventing electric current, it is achieved the conductor ice prevention of ultra-high-tension power transmission line, it is possible to realization does not have a power failure anti-icing, reduces because stopping
The economic loss that electricity causes.
Preferably, in above-mentioned HVAC power transmission line conductor ice prevention device: described high frequency electric source includes alternating current power supply
P2, disconnecting switch K2, Industrial Frequency Transformer T1, disconnecting switch K1, IGCT full-bridge rectification module, storage capacitor C0, filter inductance
L0, reverse switch transistor full-bridge inverting module, resonant capacitance C1 and inductance L1；Described alternating current power supply P2 is through disconnecting switch K2 even
Connect the input of Industrial Frequency Transformer T1, the outfan of described Industrial Frequency Transformer T1 connects IGCT full-bridge rectification through disconnecting switch K1
Module, the accumulator that described IGCT full-bridge rectification module is constituted through storage capacitor C0, filter inductance L0 connects reverser
Transistor full-bridge inverting module, the outfan of described reverse switch transistor full-bridge inverting module connects resonant capacitance C1 and resonance
The series resonant circuit that inductance L3 is constituted, the outfan of described series resonant circuit connects the input of high frequency transformer T.
By use this technical scheme: alternating current power supply P2 output alternating voltage export after Industrial Frequency Transformer transformation to
IGCT full-bridge rectification module converter is unidirectional current, is stored in the accumulator being made up of storage capacitor C0, filter inductance L0, then
It is high-frequency bipolar square wave through reverse switch transistor (RSD) full-bridge inverting module converter, through resonant capacitance C1 and resonant inductance
The series resonance unit of L3 composition, is accessed in HVAC power transmission line, output height by high frequency transformer T and resonant capacitance C
Frequently amplitude deicing electric current.
Another kind of preferred version is: described high frequency electric source includes that DC source, storage capacitor C0, reverse switch transistor are complete
Bridge inversion module, resonant capacitance C1 and inductance L1；Storage capacitor C0 is parallel to the outfan of DC source, described DC source depends on
Sequence connects through reverse switch transistor full-bridge inverting module and the series resonant circuit being made up of resonant capacitance C1 and resonant inductance L3
It is connected to Industrial Frequency Transformer T1.
By using this technical scheme: the unidirectional current of DC source output is inverse through reverse switch transistor (RSD) full-bridge
Change module converter is high-frequency bipolar square wave, by high frequency transformer T after resonant capacitance C1 and resonant inductance L3 series resonance
Access in HVAC power transmission line with resonant capacitance C.
It is even more preferred that high frequency electric source output majority of high frequency electric current by ice-melt section AB, disconnecting switch K6, first
High pass filter returns to the earth terminal of transformator T.The most preferably: circuit resistance R of described AB section circuit and inductance L1
Impedance compare, R≤0.1L1.
In this way: electric capacity C2 forms series resonant circuit with AB section line inductance, by non-resistive for the equivalence of AB section
High-frequency resistance L0 is reduced to approximate 0, and when the impedance of the line resistance R of AB section is much smaller than L1, majority of high frequency electric current leads to
Cross AB section lead, disconnecting switch K6, the first high pass filter and earth terminal and return to the earth terminal of transformator T, conductor overheating, thus
Remove wire ice coating, avoid the high frequency electric impact on the power circuit outside deicing circuit simultaneously.
The invention have the benefit that
Compared with prior art, the high frequency electric source of the present invention can be directly installed on power regulation station, it is not necessary to is arranged on transmission of electricity
The midpoint of circuit, is greatly reduced the installation difficulty of ice-removing and ice-preventing device, construction cost and maintenance cost, meanwhile, staff
Midpoint without circuit of trudging operates and safeguards, significantly reduces human cost, it is achieved that the quick of dispatch command rings
Should；High frequency electric source uses RSD as power switch, exports high-frequency high-power electric current, with high frequency electric source based on IGBT, MOSFET
Comparing, the cost of high frequency electric source of the present invention substantially reduces, and the reliability of power system, stability significantly rise.
Accompanying drawing explanation
Fig. 1 is the principle schematic of the present invention, and wherein A B section is the deicing section of HVAC power transmission line；
Fig. 2 is the structural representation of the embodiment of the present invention 1；
Fig. 3 is a kind of internal structure schematic diagram of Fig. 2 medium-high frequency power module；
Fig. 4 is the another kind of internal structure schematic diagram of Fig. 2 medium-high frequency power module.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described, but protection scope of the present invention is not limited solely to implement
Example.
Embodiments of the invention 1 as Figure 1-4:
A kind of HVAC power transmission line conductor ice prevention device, including deicing device and high pass filter；Described needs remove
Two end points of the single exchange wire of the transmission line of alternation current of ice are respectively side a and b, referred to as ice-melt section AB；Need deicing
The terminal A end of ice-melt section AB deicing device is installed, the terminal B end of the other end connects the second high pass filter of ground connection；Described
Deicing device includes inductance L1, electric capacity C, electric capacity C2, disconnecting switch K, disconnecting switch K4, disconnecting switch K5, disconnecting switch K6, height
Frequency power, electric capacity C3, high frequency transformer T and the first high pass filter；Described high frequency electric source passes sequentially through high frequency transformer T, electricity
Holding the input point that C, disconnecting switch K and electric capacity C2 access the A end of ice-melt section AB, one end of described electric capacity C2 connects disconnecting switch K
One end, the other end of described electric capacity C2 connects the input point of the A end of ice-melt section AB；Described inductance L1 one end connects disconnecting switch
K and the common port of electric capacity C2, the described inductance L1 other end connects disconnecting switch K4 and the common port of electric capacity C3, described electric capacity C3's
One end connects disconnecting switch K4 and the common port of inductance L1, and the other end of described electric capacity C3 connects the A end output point of ice-melt section AB,
One end of described disconnecting switch K4 connects one end of electric capacity C3, and the other end of described disconnecting switch K4 connects the first high pass filter
One end, the other end ground connection of described first high pass filter；One end of described disconnecting switch K5 connects disconnecting switch K and electric capacity
The common port of C2, the other end connects the A end output point of ice-melt section AB；One end of described second high pass filter connects disconnecting switch
One end of K6, the other end ground connection of described second high pass filter, the other end of described disconnecting switch K6 connects the B of ice-melt section AB
End.
Wherein, described high frequency electric source includes alternating current power supply P2, disconnecting switch K2, Industrial Frequency Transformer T1, disconnecting switch K1, crystalline substance
Brake tube full-bridge rectification module, storage capacitor C0, filter inductance L0, reverse switch transistor full-bridge inverting module, resonant capacitance C1
With inductance L1；Described alternating current power supply P2 connects the input of Industrial Frequency Transformer T1, described Industrial Frequency Transformer T1 through disconnecting switch K2
Outfan through disconnecting switch K1 connect IGCT full-bridge rectification module, described IGCT full-bridge rectification module is through storage capacitor
The accumulator that C0, filter inductance L0 are constituted connects reverse switch transistor full-bridge inverting module, described reverse switch transistor
The outfan of full-bridge inverting module connects the series resonant circuit that resonant capacitance C1 and resonant inductance L3 is constituted, described series resonance
The outfan of circuit connects the input of high frequency transformer T.
High frequency electric source also can be by DC source, storage capacitor C0, reverse switch transistor full-bridge inverting module, resonant capacitance
C1 and resonant inductance L3 is constituted.Wherein, storage capacitor C0 is parallel to the outfan of DC source, described DC source sequentially through anti-
Connect paramount to switching transistor full-bridge inverting module and the series resonant circuit being made up of resonant capacitance C1 and resonant inductance L3
The input of frequency power transformer T.
In figure: section A-B is the circuit needing deicing.
In practice, its work process is as follows: when high-voltage AC transmission line circuit normally works, need not deicing, isolation
Switch K5 Guan Bi, disconnecting switch K6, disconnecting switch K, disconnecting switch K4 all disconnect, and are isolated from transmission system by deicer, remove
Ice production apparatus does not works.When circuit AB section needs deicing, K5 disconnects, and K, K6, K4 all close, and high frequency electric source passes through high frequency transformer
T exports high frequency electric, and electric capacity C2 forms series resonant circuit with AB section line inductance, by non-for the equivalence of AB section resistive high-frequency resistance
L0 is reduced to approximate 0, and line electricity resistive impedance R is the most only left in the impedance of AB section, when the impedance of the line resistance R of AB section
During much smaller than L1, majority of high frequency electric current passes through AB section line conductor, forms the high frequency deicing electric current of AB section line conductor.One
In the case of as, the ratio of R and L1 is R≤0.1L1, and this ratio value is the relatively optimal value of suggestion, but during actual application, according to reality
Effect design ratio value, and it is not limited to this value.Inductance L1 and C3 series resonance, both power frequency total impedances are close or equal to 0,
L1 impact on power frequency circuit is reduced or eliminated.
Last it is noted that above example only in order to the present invention is described and and unrestricted technology described in the invention
Scheme, therefore, although this specification with reference to each above-mentioned embodiment to present invention has been detailed description, but, this
Field it is to be appreciated by one skilled in the art that still the present invention can be modified or equivalent, and all without departing from this
The technical scheme of the spirit and scope of invention and improvement thereof, it all should be contained in scope of the presently claimed invention.
Claims (6)
1. a HVAC power transmission line conductor ice prevention device, it is characterised in that: include deicing device and high pass filter；Institute
Two end points of the single exchange wire stating the transmission line of alternation current needing deicing are respectively side a and b, referred to as ice-melt section AB；
The terminal A end needing ice-melt section AB of deicing installs deicing device, and the terminal B end of the other end connects the second high-pass filtering of ground connection
Device；Described deicing device includes inductance L1, electric capacity C, electric capacity C2, disconnecting switch K, disconnecting switch K4, disconnecting switch K5, keeps apart
Close K6, high frequency electric source, electric capacity C3, high frequency transformer T and the first high pass filter；Described high frequency electric source passes sequentially through high frequency transformation
Device T, electric capacity C, disconnecting switch K and electric capacity C2 access the input point of the A end of ice-melt section AB, and one end of described electric capacity C2 connects isolation
One end of switch K, the other end of described electric capacity C2 connects the input point of the A end of ice-melt section AB；Described inductance L1 one end connect every
Leaving pass K and the common port of electric capacity C2, the described inductance L1 other end connects disconnecting switch K4 and the common port of electric capacity C3, described electricity
The one end holding C3 connects disconnecting switch K4 and the common port of inductance L1, and the other end of described electric capacity C3 connects the A end of ice-melt section AB
Output point, one end of described disconnecting switch K4 connects one end of electric capacity C3, and it is high that the other end of described disconnecting switch K4 connects first
One end of bandpass filter, the other end ground connection of described first high pass filter；One end of described disconnecting switch K5 connects and keeps apart
Closing K and the common port of electric capacity C2, the other end connects the A end output point of ice-melt section AB；One end of described second high pass filter is even
Connecing one end of disconnecting switch K6, the other end ground connection of described second high pass filter, the other end of described disconnecting switch K6 connects
The B end of ice-melt section AB.
2. a kind of HVAC power transmission line conductor ice prevention device, it is characterised in that: described high frequency electric source
Including alternating current power supply P2, disconnecting switch K2, Industrial Frequency Transformer T1, disconnecting switch K1, IGCT full-bridge rectification module, storage capacitor
C0, filter inductance L0, reverse switch transistor full-bridge inverting module, resonant capacitance C1 and resonant inductance L3；Described alternating current power supply
P2 connects the input of Industrial Frequency Transformer T1 through disconnecting switch K2, the outfan of described Industrial Frequency Transformer T1 connects through disconnecting switch K1
Connect IGCT full-bridge rectification module, the energy storage that described IGCT full-bridge rectification module is constituted through storage capacitor C0, filter inductance L0
Circuit connects reverse switch transistor full-bridge inverting module, and the outfan of described reverse switch transistor full-bridge inverting module connects
The series resonant circuit that resonant capacitance C1 and resonant inductance L3 is constituted, the outfan of described series resonant circuit connects high frequency transformation
The input of device T.
3. a kind of HVAC power transmission line conductor ice prevention device, it is characterised in that: described high frequency electric source
Including DC source, storage capacitor C0, reverse switch transistor full-bridge inverting module, resonant capacitance C1 and resonant inductance L3；Storage
The outfan of DC source can be parallel to by electric capacity C0, described DC source sequentially through reverse switch transistor full-bridge inverting module and
The series resonant circuit being made up of resonant capacitance C1 and resonant inductance L3 is connected to the input of high frequency transformer T.
4. a kind of high-voltage AC transmission line conductor ice prevention device, it is characterised in that: described electric capacity C2 is with high
The line inductance composition series resonant circuit of pressure transmission line AB section, high frequency electric passes through the outfan of high frequency transformer T, electric capacity
C, disconnecting switch K, electric capacity C2, ice-melt section AB, disconnecting switch K6, the second high pass filter return to the earth terminal of transformator T.
5. a kind of HVAC power transmission line conductor ice prevention device, it is characterised in that: described inductance L1's
Resistance value should be greater than the resistance R of AB section circuit, circuit resistance R of the impedance of described inductance L1 and AB section circuit preferably than
Value is R≤0.1L1；Electric capacity C2 and AB section line inductance L0 forms series resonant circuit, reduces the non-resistive high frequency of equivalence of AB section
Impedance Z 0, the preferred ratio of the non-resistive high-frequency resistance Z0 of equivalence of described AB section and circuit resistance R of AB section circuit be Z0≤
0.5R。
6. a HVAC power transmission line conductor ice prevention device combination, it is characterised in that: by three sets as claim 1-5 is appointed
The HVAC power transmission line conductor ice prevention device described in a claim of anticipating combines, and constitutes three-phase AC line and prevents
Ice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610829594.6A CN106300204B (en) | 2016-09-18 | 2016-09-18 | A kind of HVAC power transmission line conductor ice prevention device and combinations thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610829594.6A CN106300204B (en) | 2016-09-18 | 2016-09-18 | A kind of HVAC power transmission line conductor ice prevention device and combinations thereof |
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| CN106300204A true CN106300204A (en) | 2017-01-04 |
| CN106300204B CN106300204B (en) | 2018-03-30 |
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| CN201610829594.6A Expired - Fee Related CN106300204B (en) | 2016-09-18 | 2016-09-18 | A kind of HVAC power transmission line conductor ice prevention device and combinations thereof |
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| CN107215246A (en) * | 2017-05-22 | 2017-09-29 | 北京千驷驭电气有限公司 | Contact net intelligence ice melting system |
| CN107215245A (en) * | 2017-05-22 | 2017-09-29 | 北京千驷驭电气有限公司 | The contact net ice melting system of energy self-loopa |
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| CN107215245A (en) * | 2017-05-22 | 2017-09-29 | 北京千驷驭电气有限公司 | The contact net ice melting system of energy self-loopa |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106300204B (en) | 2018-03-30 |
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