CN106300204B - 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 PDF

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Publication number
CN106300204B
CN106300204B CN201610829594.6A CN201610829594A CN106300204B CN 106300204 B CN106300204 B CN 106300204B CN 201610829594 A CN201610829594 A CN 201610829594A CN 106300204 B CN106300204 B CN 106300204B
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CN
China
Prior art keywords
connection
electric capacity
disconnecting switch
ice
inductance
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CN201610829594.6A
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Chinese (zh)
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CN106300204A (en
Inventor
彭亚斌
雷涛
卢社介
陈小玲
田凤霞
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湖北科技学院
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02GINSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G7/00Overhead installations of electric lines or cables
    • H02G7/16Devices for removing snow or ice from lines or cables

Abstract

The invention discloses a kind of HVAC power transmission line conductor ice prevention device, including deicing device and high-pass filter.Needing one end A ends of the ultra-high-tension power transmission line of deicing that deicing device is installed, in the second high-pass filter of other end B ends installation ground connection;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 accessed in HVAC power transmission line, inductance L1 one end connection electric capacity C and electric capacity C2, the first high-pass filter of other end connection ground connection.The present invention realizes that not having a power failure for HVAC power transmission line wire is anti-icing, avoids the economic loss caused by power failure;Deicing device and high-pass filter are arranged on transformer station, and deicing device does not have to, installed in the deicing circuit midpoint of bad environments, greatly reduce cost of installation and maintenance, be obviously improved reliability and stability.

Description

A kind of HVAC power transmission line conductor ice prevention device and combinations thereof

Technical field

The present invention relates to field of power, is related to a kind of anti-icing technology of high-voltage AC transmission line.It particularly relates to one Kind 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 winter icing phenomenon of transmission line of electricity.Field Ultra-high-tension power transmission line icing easily causes various mechanical accidents and electrical hazard.Therefore how to prevent field ultra-high-tension power transmission line icing It is the great difficult problem of power system.The heating power deicing method of main flow is by increasing electric current or current density in transmission line of electricity, or increasing Add the equivalent resistance of transmission pressure, or increase current in wire and conductor resistance simultaneously, make transmission pressure self-heating, so as to 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 dispatch deicing when implementing removing ice of power transmission line, it is necessary to have a power failure 4-8 small When/time, very big negative effect be present in power supply quality and economic benefit to power system.

Online high frequency ice-removing and ice-preventing method based on Kelvin effect can realize online (not having a power failure) anti-icing and deicing.High frequency is high When pressure excitation is applied on ice coating wire, it can turn into ice coating and damage dielectric and directly generate heat, can also cause the skin that becomes of wire Effect, electric current is circulated in conductive surface, cause bigger equivalent resistance that heating is lost, so as to utilize the two common caused Heat deicing.Existing high frequency ice-removing and ice-preventing method can only need the midpoint of deicing circuit to install high-frequency and high-voltage exciting bank (high frequency electric source), trapper (high-pass filter) is installed at the both ends of circuit, to control the sphere of action of high frequency electric.And deicing Most of midpoint present position of circuit is the bad environments such as forest, mountain area, lake remote districts, and construction cost is very high, work Personnel, which need to trudge just enter the station, to be operated and safeguards, labor intensity is big, in some instances it may even be possible to causes casualties;Circuit midpoint is When lake, circuit midpoint geographic location can not build high frequency electric source.

In addition, the core component of high frequency electric source-high-frequency inversion switch module is more using semiconductor work(such as IGBT, MOSFET The connection in series-parallel of rate device forms, and these semiconductor switch are expensive, and the construction cost of device is very high, the cost performance of equipment operation It is very low.The existing high frequency ice-removing and ice-preventing method of above analytic explanation does not possess good future in engineering applications.How to overcome above-mentioned Problem is the direction that those skilled in the art need to study.

The content of the invention

It is remote for the infield of existing high frequency ice-removing and ice-preventing device, cause to build and maintenance cost is very high, operation Personnel labor intensity is big, response time period length, in some instances it may even be possible to the problems such as bringing life danger.The present invention, which proposes, to be 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 above problems.

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;The 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 Ice-melt section AB terminal A end installation deicing device, the other end terminal B end connection ground connection the second high-pass filter;It is described Deicing device include inductance L1, electric capacity C, electric capacity C2, disconnecting switch K, disconnecting switch K4, disconnecting switch K5, disconnecting switch K6, High frequency electric source, electric capacity C3, high frequency transformer T and the first high-pass filter;The high frequency electric source pass sequentially through high frequency transformer T, The input point at electric capacity C, disconnecting switch K and electric capacity C2 access ice-melt sections AB A ends, one end connection disconnecting switch of the electric capacity C2 K one end, the input point at the other end connection ice-melt section AB of electric capacity C2 A ends;Inductance L1 one end connection is kept apart Close K and electric capacity C2 common port, the common port of the inductance L1 other ends connection disconnecting switch K4 and electric capacity C3, the electric capacity C3 One end connection disconnecting switch K4 and inductance L1 common port, the other end connection ice-melt section AB of electric capacity C3 A ends are defeated Go out a little, one end connection electric capacity C3 of disconnecting switch K4 one end, the other end of the disconnecting switch K4 connects the first high pass One end of wave filter, the other end ground connection of first high-pass filter;One end connection disconnecting switch K of the disconnecting switch K5 With electric capacity C2 common port, other end connection ice-melt section AB A ends output point;Second high-pass filter one end connection every Leave the one end for closing K6, the other end ground connection of second high-pass filter, the other end connection ice-melt of the disconnecting switch K6 Section AB B ends.

By using this technical scheme:High frequency electric source passes sequentially through high frequency transformer T and resonant capacitance C is accessed 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 More than the small ice-removing and ice-preventing electric current of sunlight, the conductor ice prevention of ultra-high-tension power transmission line is realized, can realize and not have a power failure anti-icing, reduce because stopping Economic loss caused by electricity.

Preferably, in above-mentioned HVAC power transmission line conductor ice prevention device:The high frequency electric source includes AC power 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;The AC power P2 connects through disconnecting switch K2 Industrial Frequency Transformer T1 input, the output end of the Industrial Frequency Transformer T1 are connect through disconnecting switch K1 connection IGCT full-bridge rectifications Module, the accumulator connection reverser that the IGCT full-bridge rectification module is formed through storage capacitor C0, filter inductance L0 Transistor full-bridge inverting module, the output end connection resonant capacitance C1 and resonance of the reverse switch transistor full-bridge inverting module The series resonant circuit that inductance L3 is formed, the output end connection high frequency transformer T of series resonant circuit input.

By using this technical scheme:AC power P2 output alternating voltage exported after Industrial Frequency Transformer transformation to IGCT full-bridge rectification module converter is direct 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 compositions, accessed by high frequency transformer T and resonant capacitance C high in HVAC power transmission line, output Frequency amplitude deicing electric current.

Another preferred scheme is:It is complete that the high frequency electric source includes dc source, storage capacitor C0, reverse switch transistor Bridge inversion module, resonant capacitance C1 and inductance L1;Storage capacitor C0 be parallel to the output end of dc source, the dc source according to 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 direct current of dc source output is inverse through reverse switch transistor (RSD) full-bridge Change module converter passes through high frequency transformer T into high-frequency bipolar square wave after resonant capacitance C1 and resonant inductance L3 series resonances Accessed with resonant capacitance C in HVAC power transmission line.

More preferably:The majority of high frequency electric current of high frequency electric source output passes through ice-melt section AB, disconnecting switch K6, the One high-pass filter returns to transformer T earth terminal.It is further to be preferably:The circuit resistance R and inductance of the AB sections circuit L1 impedance is compared, R≤0.1L1.

In this way:Electric capacity C2 and AB sections line inductance composition series resonant circuit, by the equivalent non-resistive of AB sections High-frequency resistance LABIt is reduced to and is approximately equal to 0, when the line resistance R of AB sections impedance is much smaller than L1, majority of high frequency electric current leads to Cross the earth terminal that AB section leads, disconnecting switch K6, the first high-pass filter and earth terminal return to transformer T, conductor overheating, so as to Wire ice coating is removed, while avoids influence of the high frequency electric to the power circuit outside deicing circuit.

The device have the advantages that:

Compared with prior art, high frequency electric source of the invention can be directly installed on power regulation station, without installed in transmission of electricity The midpoint of circuit, the installation difficulty, construction cost and maintenance cost of ice-removing and ice-preventing device is greatly reduced, meanwhile, staff It need not trudge to the midpoint operation and maintenance of circuit, significantly reduce human cost, realize the quick sound of dispatch command Should;High frequency electric source, as power switch, exports high-frequency high-power electric current, with the high frequency electric source based on IGBT, MOSFET using RSD Compare, the cost of high frequency electric source of the present invention substantially reduces, and the reliability of power system, stability significantly rise.

Brief description of the drawings

Fig. 1 is the principle schematic of the present invention, and wherein A-B sections remove stade for 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 modules;

Fig. 4 is another internal structure schematic diagram of Fig. 2 medium-high frequency power modules.

Embodiment

With reference to 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;The 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 Ice-melt section AB terminal A end installation deicing device, the other end terminal B end connection ground connection the second high-pass filter;It is described Deicing device include inductance L1, electric capacity C, electric capacity C2, disconnecting switch K, disconnecting switch K4, disconnecting switch K5, disconnecting switch K6, High frequency electric source, electric capacity C3, high frequency transformer T and the first high-pass filter;The high frequency electric source pass sequentially through high frequency transformer T, The input point at electric capacity C, disconnecting switch K and electric capacity C2 access ice-melt sections AB A ends, one end connection disconnecting switch of the electric capacity C2 K one end, the input point at the other end connection ice-melt section AB of electric capacity C2 A ends;Inductance L1 one end connection is kept apart Close K and electric capacity C2 common port, the common port of the inductance L1 other ends connection disconnecting switch K4 and electric capacity C3, the electric capacity C3 One end connection disconnecting switch K4 and inductance L1 common port, the other end connection ice-melt section AB of electric capacity C3 A ends are defeated Go out a little, one end connection electric capacity C3 of disconnecting switch K4 one end, the other end of the disconnecting switch K4 connects the first high pass One end of wave filter, the other end ground connection of first high-pass filter;One end connection disconnecting switch K of the disconnecting switch K5 With electric capacity C2 common port, other end connection ice-melt section AB A ends output point;Second high-pass filter one end connection every Leave the one end for closing K6, the other end ground connection of second high-pass filter, the other end connection ice-melt of the disconnecting switch K6 Section AB B ends.

Wherein, the high frequency electric source includes AC power 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;Inputs of the AC power P2 through disconnecting switch K2 connection Industrial Frequency Transformers T1, the Industrial Frequency Transformer T1 Output end through disconnecting switch K1 connection IGCT full-bridge rectification modules, the IGCT full-bridge rectification module is through storage capacitor The accumulator connection reverse switch transistor full-bridge inverting module that C0, filter inductance L0 are formed, the reverse switch transistor The series resonant circuit that the output end connection resonant capacitance C1 and resonant inductance L3 of full-bridge inverting module is formed, the series resonance The output end connection high frequency transformer T of circuit input.

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 formed.Wherein, storage capacitor C0 is parallel to the output end of dc source, the dc source sequentially passes through Reverse switch transistor full-bridge inverting module and it is connected to by resonant capacitance C1 and resonant inductance the L3 series resonant circuit formed High frequency transformer T input.

In figure:Section A-B is the circuit for needing deicing.

In practice, its course of work is as follows:When high-voltage AC transmission line circuit normal work, do not need deicing when, isolation K5 closures are switched, disconnecting switch K6, disconnecting switch K, disconnecting switch K4 are disconnected, and deicer is isolated from transmission system, removed Ice production apparatus does not work.When circuit AB sections need deicing, K5 is disconnected, and K, K6, K4 are closed, and high frequency electric source passes through high frequency transformer T exports high frequency electric, electric capacity C2 and AB sections line inductance composition series resonant circuit, by the equivalent non-resistive high-frequency resistance of AB sections LABThe impedance substantially only resistive impedance R of remaining line electricity for being approximately equal to 0, AB sections is reduced to, when the line resistance R of AB sections resistance Anti- when be much smaller than L1, majority of high frequency electric current passes through AB section line conductors, the high frequency deicing electric current of formation AB section line conductors. Generally, R and L1 ratio is R≤0.1L1, and this ratio value is suggestion

Relatively optimal value, but during practical application, according to actual effect design proportion value, and be not limited to this value.Inductance L1 With C3 series resonances, both power frequency total impedances are close or equal to 0, influences of the L1 to power frequency circuit are reduced or eliminated.

Finally it should be noted that:Above example only not limits skill described in the invention to illustrate the present invention Art scheme, therefore, although this specification with reference to above-mentioned each embodiment to present invention has been detailed description, It will be understood by those within the art that still the present invention can be modified or equivalent substitution, and all are not departed from The technical scheme of the spirit and scope of the present invention and its improvement, it all should cover in scope of the presently claimed invention.

Claims (5)

  1. A kind of 1. HVAC power transmission line conductor ice prevention device, it is characterised in that:Including deicing device and high-pass filter;Will Two end points for needing the single exchange wire of anti-icing transmission line of alternation current are respectively side a and b, referred to as ice-melt section AB;Need Want anti-icing ice-melt section AB terminal A end that deicing device, the second high-pass filtering of the terminal B end connection ground connection of the other end are installed Device;The deicing device includes inductance L1, electric capacity C, electric capacity C2, disconnecting switch K, disconnecting switch K4, disconnecting switch K5, kept apart Close K6, high frequency electric source, electric capacity C3, high frequency transformer T and the first high-pass filter;The 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 at ice-melt section AB A ends, one end connection isolation of the electric capacity C2 Switch K one end, the input point at the other end connection ice-melt section AB of electric capacity C2 A ends;The connection of described inductance L1 one end every Leave the common port for closing K and electric capacity C2, the common port of the inductance L1 other ends connection disconnecting switch K4 and electric capacity C3, the electricity Hold C3 one end connection disconnecting switch K4 and inductance L1 common port, the other end connection ice-melt section AB of electric capacity C3 A ends Output point, one end connection electric capacity C3 of disconnecting switch K4 one end, the other end connection first of the disconnecting switch K4 are high One end of bandpass filter, the other end ground connection of first high-pass filter;One end connection of the disconnecting switch K5 is kept apart Close K and electric capacity C2 common port, other end connection ice-melt section AB A ends output point;One end of second high-pass filter connects Connect disconnecting switch K6 one end, the other end ground connection of second high-pass filter, the other end connection of the disconnecting switch K6 Ice-melt section AB B ends;The circuit resistance R of the AB sections circuit is compared with inductance L1 impedance, R≤0.1L1.
  2. A kind of 2. HVAC power transmission line conductor ice prevention device as claimed in claim 1, it is characterised in that:The high frequency electric source Including AC power 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;The AC power Inputs of the P2 through disconnecting switch K2 connection Industrial Frequency Transformers T1, the output end of the Industrial Frequency Transformer T1 connect through disconnecting switch K1 Connect IGCT full-bridge rectification module, the energy storage that the IGCT full-bridge rectification module is formed through storage capacitor C0, filter inductance L0 Circuit connects reverse switch transistor full-bridge inverting module, the output end connection of the reverse switch transistor full-bridge inverting module The series resonant circuit that resonant capacitance C1 and resonant inductance L3 is formed, the output end connection high frequency transformation of the series resonant circuit Device T input.
  3. A kind of 3. HVAC power transmission line conductor ice prevention device as claimed in claim 1, it is characterised in that:The 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 Can electric capacity C0 be parallel to the output end of dc source, the dc source sequentially through reverse switch transistor full-bridge inverting module and High frequency transformer T input is connected to by resonant capacitance C1 and resonant inductance the L3 series resonant circuit formed.
  4. A kind of 4. HVAC power transmission line conductor ice prevention device as claimed in claim 1, it is characterised in that:The electric capacity C2 with The line inductance composition series resonant circuit of ultra-high-tension power transmission line AB sections, output end of the high frequency electric by high frequency transformer T, electricity Hold the earth terminal that C, disconnecting switch K, electric capacity C2, ice-melt section AB, disconnecting switch K6, the second high-pass filter return to transformer T.
  5. A kind of 5. HVAC power transmission line conductor ice prevention device combination, it is characterised in that:By appointing in three sets such as claim 1-4 HVAC power transmission line conductor ice prevention device described in one claim of meaning combines, and forms three-phase AC line and prevents Ice.
CN201610829594.6A 2016-09-18 2016-09-18 A kind of HVAC power transmission line conductor ice prevention device and combinations thereof CN106300204B (en)

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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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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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CN106300204B true CN106300204B (en) 2018-03-30

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Publication number Priority date Publication date Assignee Title
CN107215245B (en) * 2017-05-22 2020-01-21 北京千驷驭电气有限公司 Energy self-circulation contact net ice melting system
CN107215246B (en) * 2017-05-22 2020-05-12 北京千驷驭电气有限公司 Intelligent ice melting system of contact network

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* Cited by examiner, † Cited by third party
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RU2309540C1 (en) * 2006-04-18 2007-10-27 Открытое акционерное общество энергетики и электрификации "Волгоградэнерго" System for transferring signals through electric supply lines to detect ice coating on wires
CN101394073A (en) * 2008-04-02 2009-03-25 广州普瑞电力控制系统设备有限公司 Method and device for ice coating prevention and melt ice removing on electricity transmission and distribution line
CN101272042B (en) * 2008-05-09 2010-09-08 东南大学 Industrial frequency resonant vibration deicing method of electric power line
CN101964506A (en) * 2010-09-13 2011-02-02 东南大学 High voltage high powder double-tuned method for electric deicing of overhead power transmission line
CN102195261A (en) * 2011-05-31 2011-09-21 长沙理工大学 18kV and 40kHz high-frequency de-icing device and de-icing method thereof
CN204928049U (en) * 2015-09-11 2015-12-30 国网江西省电力公司南昌供电分公司 High frequency excitation ice -melt device
CN206195310U (en) * 2016-09-18 2017-05-24 湖北科技学院 High voltage alternating current transmission lines conductor ice prevention device and combination thereof

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