CN101567539A - Method and device for overhead transmission line harmonic and resonance deicing - Google Patents
Method and device for overhead transmission line harmonic and resonance deicing Download PDFInfo
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- CN101567539A CN101567539A CNA200810104965XA CN200810104965A CN101567539A CN 101567539 A CN101567539 A CN 101567539A CN A200810104965X A CNA200810104965X A CN A200810104965XA CN 200810104965 A CN200810104965 A CN 200810104965A CN 101567539 A CN101567539 A CN 101567539A
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Abstract
The invention relates to a method and device for overhead transmission line harmonic and resonance deicing. A passage unit 1 capable of obstructing a high voltage and conducting a harmonic is used to perfectly integrates the electricity energy of a low loss transmission electric power source 3 on a transmission line 4 and the thermal power produced by a high efficiency bearing power unit 2 on a resistor. The device provides a higher deicing power with a lower harmonic voltage and carries out the deicing operation in a normal power supply state smartly with the help of a mature frequency converter structure and a power line carrier device and application thereof. As heat produced by the line loss of a normal power supply and an interrupted deicing mode are used, the method saves the electrical energy consumed by deicing and is greatly better than other deicing methods. The device for the overhead transmission line harmonic and resonance deicing has a clear principle, a simple structure, low fabrication cost, safety and reliability, convenient mobility, and no influence on the environment and the electric network. The device has perfect effects on various transmission line models.
Description
Technical field
The present invention relates to be used for the de-icing method and the device of overhead transmission line.
Background technology
Severe winter and season in the early spring, Hubei and Hunan Provinces, Guangdong and Guangxi Provinces, area, Jiangxi are with, are reached in China Yunnan-Guizhou Plateau, Sichuan and Shanxi one, freezing fog and glaze phenomenon often appear, cause coated by ice of overhead power transmission line, make that circuit is waved, flashover, burn, even the bar that breaks to fall, electric network composition is destroyed, safe operation is subjected to serious threat.
Kind surplus de-icing method has 30 both at home and abroad at present is broadly divided into heating power deicing method and mechanical deicing's method two classes.Change that trend is distributed ice-melt, utilized Joule effect, when short circuit current thermal effect, high-frequency and high-voltage excitation when dielectric loss heating, high-frequency and high-voltage excitation skin effect make the circuit heating, and the electric power deicing that electromagnetic force, short-time pulse cause between two divided conductor.The Quebec, CAN Research Institute goes out the icing on a kind of electromechanical device removing extra high voltage network and the overhead ground wire.This device is made up of a movable frames and the superincumbent steel blade of installation, blade adopts specific shape and mounting means to obtain maximum operating efficiency, extension pulley can produce enough powerful tractive effort, at ground remote control, communication context is 1km (being about two spans) to this device by the operations staff.Artificial shake is smash, tommy gun shooting etc. handled dead line.In case of emergency tracking person can only be a part of icing circuit deicing seldom with hot stick or other similar insulating rod, and therefore labour intensive and uneconomical is necessary to adopt more effective measures and device for reducing the loss.People wish under the situation that does not influence power supply, and are continuous, gentle, regulate the intensity of deicing reliably, and are not subjected to the restriction of transmission line pattern.
Summary of the invention
Overhead transmission line harmonic resonant vibration deicing method of the present invention and device, by deadening the channel unit of high pressure, conduction harmonic wave, power cell produces thermal power on transmission line resistance.With transmission line low-loss transmission electric energy, efficiently carry harmonic wave heating deicing perfect adaptation.
To achieve these goals, overhead transmission line harmonic resonant vibration deicing method of the present invention and device have adopted following technical scheme.
1, forms system by channel unit and power cell and transmission line and electric power source.Electric power source is powered by transmission line, and channel unit deadens frequency of supply electric energy, transmission harmonic frequency electric energy.The intrinsic parameter of designed channel cell parameters and transmission line (inductance, electric capacity, resistance) is facilitated the resonance frequency (15-20 KHz) away from frequency of supply, makes system impedance be the simple resistance of transmission line under resonance frequency.Adjust power cell through passage output frequency and voltage, make the transmission line heating.Can make harmonic wave not exceed the electrical network departmental standard because of exporting too high voltages.
Channel unit is made of electric capacity or inductance or transformer, but individual unit forms passage, and the reason of transmission line electric pressure can be connected into passage by a plurality of channel units in addition.Divide circuit head end passage and line end passage, circuit head end passage connects power cell.Each needs three passages the three phase line first and last, connects to be star or triangle.Each needs two or a passage installation of dual lightning wires road first and last, and each needs a passage built on stilts zero line first and last.The circuit first and last can be whole piece circuit first and last, also can be one section circuit first and last.Circuit first and last end passage can be born by the former configuration element of circuit (all kinds of electric capacity, inductance, transformer etc.), and the passage of line end also can be born by circuit equivalent capacity (self-capacitance, its electric capacity).
Power cell is made up of rectifier and inverter etc.Power cell is from the electrical network power taking, and the unit, road is connected in output, and the long more power demand cell power of circuit is big more.Power cell output is away from the alternating voltage of frequency of supply, and the adaptation line resistance is exported enough power.That power cell has is single-phase, three-phase, type such as heterogeneous, is that output frequency is the frequency converter of 15-20 KHz.Comprise high voltage converter and low pressure universal frequency converter, by improve frequency or more the conversion waveform generator transformation form.Power cell should be meticulous the adjusting output frequency.
2, the overhead transmission line harmonic resonance frequency can and be calculated the back acquisition by the test of transmission line carrier communication equipment.
3, device can closed loop move between disaster phase continuously, keeps line temperature a little more than zero degree.
4, device can be interrupted the reforwarding row at disaster phase, starting drive when treating that circuit freezes certain thickness (by design standard as 10 millimeters), and this moment, heat conducted in ice, and critical heat is provided, and was not distributed to the space.And needn't the ice body off-bottom, only ice body top deliquescing (because of contacting with circuit) can be fallen with deadweight.Can save the energy in a large number.
5, device needn't be fixed and configuration in a large number, at circuit appropriate location spare interface, disposes the touring operation of some wheeled apparatus, can only play a role in several days the condition of a disaster in 1 year.
6, the intrinsic parameter of transmission line (inductance, electric capacity, resistance) is because of natural conditions such as weather, temperature, humidity change to some extent, and the power cell output frequency will have certain adjusting range.
7, if when power cell need be taken into account power transmission line, lightning conducter, built on stilts zero line, the power cell output frequency will have the adjusting range of broad, and can do the conversion of single-phase, two-phase, three-phase.
When 8, the intrinsic parameter of three phase transmission line is asymmetric, can handle wherein two-phase arbitrarily earlier, time-sharing in turn.When head end is located at one section circuit middle, two direction operations backward forward.Keep the resonance of a direction earlier, handle another direction again.
9, lightning conducter and built on stilts zero line can reduce the channel unit cost because of no isolated high-voltage demand.
The principle of the invention is clear, and is simple in structure, cheap, safe and reliable, is convenient to move.Save the energy, do not influence environment, do not impact electrical network, all kinds of transmission line patterns are all had perfect effect.
Description of drawings
Fig. 1 is overhead transmission line harmonic resonant vibration deicing method of the present invention and the system diagram that installs embodiment.
Fig. 2 is the present invention is taken on channel unit by the overhead transmission line equivalent capacity a schematic diagram.
Fig. 3 is that the present invention is used for installation of dual lightning wires deicing schematic diagram.
Fig. 4 is that the present invention is used for installation of dual lightning wires and built on stilts zero line deicing schematic diagram.
Fig. 5 is that the present invention is used for single lightning conducter or built on stilts zero line deicing schematic diagram.
Embodiment
Specify overhead transmission line harmonic resonant vibration deicing method of the present invention and device embodiment below in conjunction with accompanying drawing, but the invention is not restricted to following each embodiment.
Fig. 1 is overhead transmission line harmonic resonant vibration deicing method of the present invention and the system diagram that installs embodiment.1 is channel unit, and 2 is power cell, and 3 is electric power source, and 4 is transmission line.
Fig. 2 is the present invention is taken on channel unit by overhead transmission line equivalent capacity 5 a schematic diagram.
Fig. 3 is that the present invention is used for installation of dual lightning wires 6 deicing schematic diagrames.
Fig. 4 is that the present invention is used for installation of dual lightning wires 7,8 and built on stilts zero line 9 deicing schematic diagrames.
Fig. 5 is that the present invention is used for single lightning conducter or built on stilts zero line deicing schematic diagram.
The course of work below in conjunction with accompanying drawing 1 explanation overhead transmission line harmonic resonant vibration deicing method of the present invention and device.
Overhead transmission line harmonic resonant vibration deicing method of the present invention and device by means of frequency changer and the power carrier equipment and the application of maturation, provide bigger deicing power with lower harmonic voltage dexterously, make and implement the deicing operation under the normal power supply state.Owing to utilized the line loss heating of normal power supply, and adopted chopping mode, saved the deicing electric energy, be better than other deicing modes greatly.
Claims (9)
1, overhead transmission line harmonic resonant vibration deicing method and device is characterized in that: form system by channel unit and power cell and transmission line and electric power source.Electric power source is powered by transmission line, and channel unit deadens frequency of supply electric energy, transmission harmonic frequency electric energy.The intrinsic parameter of designed channel cell parameters and transmission line (inductance, electric capacity, resistance) is facilitated the resonance frequency (15-20 KHz) away from frequency of supply, makes system impedance be the simple resistance of transmission line under resonance frequency.Adjust power cell through passage output frequency and voltage, make the transmission line heating.Can make harmonic wave not exceed the electrical network departmental standard because of exporting too high voltages.
Channel unit is made of electric capacity or inductance or transformer, but individual unit forms passage, and the reason of transmission line electric pressure can be connected into passage by a plurality of channel units in addition.Divide circuit head end passage and line end passage, circuit head end passage connects power cell.Each needs three passages the three phase line first and last, connects to be star or triangle.Each needs two or a passage installation of dual lightning wires road first and last, and each needs a passage built on stilts zero line first and last.The circuit first and last can be whole piece circuit first and last, also can be one section circuit first and last.Circuit first and last end passage can be born by the former configuration element of circuit (all kinds of electric capacity, inductance, transformer etc.), and the passage of line end also can be born by circuit equivalent capacity (self-capacitance, its electric capacity).
Power cell is made up of rectifier and inverter etc.Power cell is from the electrical network power taking, and the unit, road is connected in output, and the long more power demand cell power of circuit is big more.Power cell output is away from the alternating voltage of frequency of supply, and the adaptation line resistance is exported enough power.That power cell has is single-phase, three-phase, type such as heterogeneous, is that output frequency is the frequency converter of 15-20 KHz.Comprise high voltage converter and low pressure universal frequency converter, by improve frequency or more the conversion waveform generator transformation form.Power cell should be meticulous the adjusting output frequency.
2, according to described overhead transmission line harmonic resonant vibration deicing method of claim 1 and device, it is characterized in that: the overhead transmission line harmonic resonance frequency can and be calculated the back by the test of transmission line carrier communication equipment and obtain.
3, according to described overhead transmission line harmonic resonant vibration deicing method of claim 1 and device, it is characterized in that: device can closed loop move between disaster phase continuously, keeps line temperature a little more than zero degree.
4, according to described overhead transmission line harmonic resonant vibration deicing method of claim 1 and device, it is characterized in that: device can be interrupted the reforwarding row at disaster phase, treat circuit freeze certain thickness (by design standard as 10 millimeters) time starting drive, the conduction in ice of heat this moment, critical heat is provided, is not distributed to the space.And needn't the ice body off-bottom, only ice body top deliquescing (because of contacting with circuit) can be fallen with deadweight.Can save the energy in a large number.
5, according to claim 1,4, described overhead transmission line harmonic resonant vibration deicing method and device, it is characterized in that: device needn't be fixed and a large amount of configuration, at circuit appropriate location spare interface, dispose the touring operation of some wheeled apparatus, can in 1 year, only play a role in several days the condition of a disaster.
6, according to described overhead transmission line harmonic resonant vibration deicing method of claim 1 and device, it is characterized in that: the intrinsic parameter of transmission line (inductance, electric capacity, resistance) is because of natural conditions such as weather, temperature, humidity change to some extent, and the power cell output frequency will have certain adjusting range.
7, according to described overhead transmission line harmonic resonant vibration deicing method of claim 1 and device, it is characterized in that: in the time of need taking into account power transmission line, lightning conducter, built on stilts zero line as if a power cell, the power cell output frequency will have the adjusting range of broad, and can do the conversion of single-phase, two-phase, three-phase.
8, according to claim 1,7 described overhead transmission line harmonic resonant vibration deicing method and devices, it is characterized in that: when the intrinsic parameter of three phase transmission line is asymmetric, can handle wherein two-phase arbitrarily earlier, time-sharing in turn.When head end is located at one section circuit middle, two direction operations backward forward.Keep the resonance of a direction earlier, handle another direction again.
9, according to described overhead transmission line harmonic resonant vibration deicing method of claim 1 and device, it is characterized in that: lightning conducter and built on stilts zero line can reduce the channel unit cost because of no isolated high-voltage demand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810104965XA CN101567539A (en) | 2008-04-25 | 2008-04-25 | Method and device for overhead transmission line harmonic and resonance deicing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810104965XA CN101567539A (en) | 2008-04-25 | 2008-04-25 | Method and device for overhead transmission line harmonic and resonance deicing |
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| CN101567539A true CN101567539A (en) | 2009-10-28 |
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| CNA200810104965XA Pending CN101567539A (en) | 2008-04-25 | 2008-04-25 | Method and device for overhead transmission line harmonic and resonance deicing |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101807783A (en) * | 2010-03-30 | 2010-08-18 | 东南大学 | High-voltage high-power biharmonic electrical deicing method for overhead power transmission line |
| CN102361313A (en) * | 2011-10-28 | 2012-02-22 | 顾士平 | Device for automatically realizing de-icing of power line based on skin effect |
| CN109149787A (en) * | 2018-10-12 | 2019-01-04 | 福州大学 | A kind of single time 220KV overhead transmission line insulation lightning conducter resonance takes can method |
-
2008
- 2008-04-25 CN CNA200810104965XA patent/CN101567539A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101807783A (en) * | 2010-03-30 | 2010-08-18 | 东南大学 | High-voltage high-power biharmonic electrical deicing method for overhead power transmission line |
| CN102361313A (en) * | 2011-10-28 | 2012-02-22 | 顾士平 | Device for automatically realizing de-icing of power line based on skin effect |
| CN102361313B (en) * | 2011-10-28 | 2014-09-10 | 顾士平 | Device for automatically realizing de-icing of power line based on skin effect |
| CN109149787A (en) * | 2018-10-12 | 2019-01-04 | 福州大学 | A kind of single time 220KV overhead transmission line insulation lightning conducter resonance takes can method |
| CN109149787B (en) * | 2018-10-12 | 2022-06-10 | 福州大学 | Single-circuit 220KV overhead transmission line insulated lightning conductor resonance energy taking method |
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Open date: 20091028 |