CN101442222A - High voltage induction energy fetching power supply and method for obtaining power from high voltage line - Google Patents
High voltage induction energy fetching power supply and method for obtaining power from high voltage line Download PDFInfo
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- CN101442222A CN101442222A CNA2008102121344A CN200810212134A CN101442222A CN 101442222 A CN101442222 A CN 101442222A CN A2008102121344 A CNA2008102121344 A CN A2008102121344A CN 200810212134 A CN200810212134 A CN 200810212134A CN 101442222 A CN101442222 A CN 101442222A
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Abstract
The invention provides a high-voltage inductive energy acquiring power supply and a method for acquiring the power supply from a high-voltage wire. The high-voltage inductive energy acquiring power supply comprises an energy acquiring unit for inducing a first electromotive force from the high-voltage wire, a compensating unit for inducing a second electromotive force different from the first electromotive force from the high-voltage wire and reversely compensating a part of the first electromotive force through the second electromotive force to finally balance output voltage, a surge protection unit connected to the energy acquiring unit and the compensating unit respectively, a rectifying filter unit connected to the surge protection unit and used for converting alternating current acquired by the energy acquiring unit and the compensating unit together into direct current and filtering the direct current, and a voltage reducing and stabilizing unit for stabilizing output voltage of the rectifying filter unit and reducing the stabilized voltage to be proper constant pressure output. Through introducing a compensating coil, the method uses difference of initial permeability of different magnetic materials to generate different electromotive forces to be reversely counteracted, so as to achieve wide-range compensation, output steady power, simplify circuits and reduce heat consumption.
Description
Technical field
The present invention relates to the high voltage supply field, relate in particular to a kind of high voltage induction energy fetching power supply and obtain the method for power supply to power from high-voltage line.
Background technology
When carrying out on-line monitoring for the state of power plant, transformer station and electric line, the power supply supply problem of high-pressure side electronic equipment becomes a big obstacle that hinders this technical development.Because of the electronic equipment that is used for the transmission of sensing and information is positioned at the high-pressure side, can not use conventional power supply power supply.
Using more high-pressure side supply power mode at present comprises: powered battery, the power supply of line current induction energy fetching, capacitance partial pressure are got and can be powered and laser powered sensor, and solar powered etc.
(1) powered battery
The powered battery mode designs intuitively, simple, but the equipment useful life seriously is subject to battery capacity and performance, and more exchange device or battery must have a power failure and carry out the influence power supply.
(2) line current induction energy fetching power supply
The power supply of line current induction energy fetching is the alternating magnetic field that utilizes high-tension line (interchange) to exist on every side, obtains energy by electromagnetic induction principle, then through handling the method that offers the high-pressure side electronic equipment.This energy-provision way volume is little, compact conformation, insulation-encapsulated are simple, safe in utilization; Power reliable, cost is low.Design difficulty is that the high-tension line electric current is not a stationary value, and excursion is very big, so magnetic induction coil must take into account minimum, maximum two kinds of maximum conditions simultaneously, and subsequent process circuit should have defencive function, to guarantee the stable output of voltage.At present, existing line current induction energy fetching electric supply installation, its compensation way adopt electronic circuit to finish, and circuit is complicated, and excess power is consumed with the form of heating, has reduced the reliability and the useful life of power supply to a certain extent.
(3) capacitance partial pressure is got and can be powered
Capacitance partial pressure is got and can be powered is to utilize capacitor voltage divider to get and can power from the electric field that high-tension line exists on every side.This supply power mode and line current induction energy fetching supply power mode are similar.Because the relative electric current of primary voltage is more stable, the power supply output of this scheme is also more stable, is faced with than the bigger difficulty of line current induction energy fetching power supply but design this method.At first be the electrical isolation problem that how to guarantee to get between energy circuit and the follow-up work circuit, overvoltage protection that this is strict and EMC Design; Next is exactly that this method has more source of error, and multiple factors such as temperature, stray capacitance all will influence the performance of this method; Be exactly that the power that adopts this method to obtain is limited once more, though can adjust power output by the size that changes electric capacity, excessive electric capacity will bring more problem.
(4) laser powered sensor
Laser powered sensor mainly is to adopt laser or other light source by optical fiber light energy to be sent to high-voltage side from low voltage side, by electrooptical device light energy is converted to electric flux again, through stable power output is provided after the DC-DC conversion.The outstanding advantage of this mode is an energy with the form of light by Optical Fiber Transmission to the high-pressure side, realizes the electrical isolation of high and low pressure side fully, is not subjected to the influence of electromagnetic interference, and is reliable and stable.But the difficult point of its design is all temperature influences of the emission wavelength of laser and power output, must take measures temperature is controlled automatically, and this is an one.Its two, the influence of the restriction of Stimulated Light power output, particularly photoelectric conversion efficiency, the finite energy that this method provides, the cost of manufacture height, restriction is extensive commercial.
(5) solar powered
Solar powered is to utilize photovoltaic effect, the solar energy dress is changed to electric energy and storage, to supply with on high-tension side electronic equipment.This method environmental protection, energy-conservation, but weak point is the unsteadiness of power supply, is subjected to the influence of factors such as light intensity, ambient temperature variation, seasonal variations.The not high problem of the conversion efficiency of solar cell in addition makes the finite energy that this method provides, thereby has restricted its application.
Present application and analysis result show that the power supply of line current induction energy fetching is a most promising a kind of supply power mode.
Summary of the invention
At above one or more problems, the invention provides a kind of high voltage induction energy fetching power supply and obtain the method for power supply to power from high-voltage line, introduced bucking coil, utilize the difference of different magnetic material initial permeabilities, and the difference that produces electromotive force is oppositely offset, thereby realizes the wide region compensation, exports power stably, simplify circuit, reduce hear rate.
According to an aspect of the present invention, provide a kind of high voltage induction energy fetching power supply, be used for obtaining power supply to power, having comprised: got the energy unit, be used for responding to first electromotive force from high-voltage line from high-voltage line; Compensating unit is used for being different from from the high-voltage line induction second electromotive force of first electromotive force, and passes through the oppositely part of compensation first electromotive force of second electromotive force, so that the voltage of final output is steady; The surge protection unit is connected to respectively and gets energy unit and compensating unit, is used to make device subsequently to avoid impacting, and the surge protection unit also is used for lightning strike protection; Rectification filtering unit is connected to the surge protection unit, is used for can the unit being converted to direct current with exchanging of obtaining jointly of compensating unit with getting, and direct current is carried out filtering; And the lowering and stabilizing blood pressure unit, be used for the output voltage of rectification filtering unit is carried out voltage stabilizing and the voltage after the voltage stabilizing is reduced to suitable constant voltage output.
Get and can the unit comprise that get can coil and get can magnetic core, compensating unit comprises bucking coil and compensation magnetic core.Getting can coil and the access of bucking coil differential concatenation.The initial permeability of getting the energy magnetic core is higher than the initial permeability that compensates magnetic core.
Get and to determine by needed power output with the radius and the volume of compensation magnetic core by magnetic core; And the number of turn of getting energy coil and bucking coil is determined by needed power output.
Get and can be made by cold rolled silicon steel by magnetic core, the compensation magnetic core can be made by galvanized iron sheet.Get and can be made by permalloy or nanocrystalline material by magnetic core, the compensation magnetic core can be made by cold rolled silicon steel.
According to a further aspect in the invention, also provide a kind of being used for to obtain the method for power supply to power from high-voltage line, this method comprises: can respond to first electromotive force from high-voltage line in the unit by getting, second electromotive force that is different from first electromotive force by compensating unit from the high-voltage line induction, wherein, first electromotive force is higher than second electromotive force, and second electromotive force is the part of compensation first electromotive force oppositely, so that the voltage of output is steady; Can the unit output to the surge protection unit with getting, so that device is subsequently avoided impacting with exchanging of inducing of compensating unit; To export rectification filtering unit to through the interchange of surge protection unit, be direct current with the current conversion that will obtain jointly, and direct current is carried out filtering; And the output voltage of rectification filtering unit is carried out voltage stabilizing and the voltage after the voltage stabilizing is reduced to suitable constant voltage output by the lowering and stabilizing blood pressure unit.
Wherein, the bucking coil differential concatenation of getting energy coil and compensating unit of getting the energy unit inserts.The initial permeability of getting the energy magnetic core of getting the energy unit is higher than the initial permeability of the compensation magnetic core of compensating unit.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the block diagram according to high voltage induction energy fetching power supply of the present invention;
Fig. 2 obtains the flow chart of power supply with the method for powering according to of the present invention being used for from high-voltage line.
Embodiment
Below with reference to accompanying drawing, describe the specific embodiment of the present invention in detail.
The energy of line current induction energy fetching power supply is from high-tension line, and getting can be to finish by a magnet ring that is wound with coil and is set in high-tension line.At present, the problem that this supply power mode is needed solution badly comprises: 1) under the wide region situation of change of line current, provide stable output; 2) long-term low hear rate stable operation.
About the research of line current induction energy fetching power supply, a lot of reports are arranged both at home and abroad in recent years.Require the high-pressure side electronic equipment under the less condition of high-tension line electric current, can work, can be by choosing the magnetic material of high initial magnetoconductivity, for example the energy magnetic core is got in making such as permalloy, nanocrystalline material, suitably adjusts the mode of getting the energy coil number of turn and solves.But, when line current is big, get and can will produce excess power greatly by coil, and voltage is higher, the method that is adopted in the report is based on the compensation method of complicated electronic circuit more at present, makes it can work in bigger line current.Because of adopting complicated electronic circuit, reduced the reliability of power supply, simultaneously, power supply was in high hear rate running status when line current was big, had also shortened useful life.
Problem such as induction energy fetching power circuit complexity, the hear rate that the state that the present invention is directed to power plant, transformer station and electric line is adopted when carrying out on-line monitoring is big has proposed a kind of new high voltage induction energy fetching power supply and has obtained the method for power supply to power from high-voltage line.Get the energy coil except traditional induction energy fetching power supply is used, the present invention has introduced bucking coil, utilizes the difference of different magnetic material initial permeabilities, and the difference that produces electromotive force is oppositely offset, thereby realizes the wide region compensation, exports power stably, simplify circuit, reduce hear rate.
Fig. 1 is the structured flowchart according to high voltage induction energy fetching power supply of the present invention.As shown in Figure 1, according to high voltage induction energy fetching power supply of the present invention, be used for obtaining power supply to power from high-voltage line, it comprises: get energy unit 102, be used for responding to first electromotive force from high-voltage line; Compensating unit 104 is used for being different from from the high-voltage line induction second electromotive force of first electromotive force, and passes through the oppositely part of compensation first electromotive force of second electromotive force, so that the voltage of final output is steady; Surge protection unit 106 is connected to respectively and gets energy unit and compensating unit, is used to make device subsequently to avoid impacting; Rectification filtering unit 108 is connected to the surge protection unit, is used for can the unit being converted to direct current with exchanging of obtaining jointly of compensating unit with getting, and direct current is carried out filtering; And lowering and stabilizing blood pressure unit 110, be used for the output voltage of rectification filtering unit is carried out voltage stabilizing and the voltage after the voltage stabilizing is reduced to suitable constant voltage output.
Get and can the unit comprise that get can coil 102-2 and get can magnetic core 102-4, compensating unit 104 comprises bucking coil 104-2 and compensation magnetic core 104-4.Getting can coil and the access of bucking coil differential concatenation.Wherein, get and can be soft magnetic material with the compensation magnetic core by magnetic core, the difference of both maximums is to get the initial permeability of the initial permeability of energy magnetic core apparently higher than the compensation magnetic core.
Get and to determine by needed power output with the radius and the volume of compensation magnetic core by magnetic core; And the number of turn of getting energy coil and bucking coil is determined by needed power output.
Get and can select for use cold rolled silicon steel to make by magnetic core, the compensation magnetic core can select for use galvanized iron sheet to make.Get and can select for use permalloy or nanocrystalline material to make by magnetic core, the compensation magnetic core can select for use cold rolled silicon steel to make.Key be to get can magnetic core initial permeability must be apparently higher than the initial permeability of compensation magnetic core.
Getting energy coil and bucking coil is formed by the enamel covered wire coiling.Getting can coil and the access of bucking coil palpus differential concatenation.Line footpath, the number of turn of getting energy coil and bucking coil depend on required power output.
Surge protection unit 106 can be used to protect back end device.Surge protection unit fast Absorption get can the unit with compensating unit the pulse spike of generation when saturated, the buffered hf energy.Simultaneously, the surge protection unit also plays the effect of lightning strike protection.
Lowering and stabilizing blood pressure unit 110 behind protective circuit of voltage regulation, again through the DC-DC conversion, produces dc constant voltage output with prime output.
Fig. 2 obtains the flow chart of power supply with the method for powering according to of the present invention being used for from high-voltage line.As shown in Figure 2, be used for obtaining power supply and comprise according to of the present invention: S202 with the method for powering from high-voltage line, can respond to first electromotive force from high-voltage line in the unit by getting, second electromotive force that is different from first electromotive force by compensating unit from the high-voltage line induction, wherein, first electromotive force is higher than second electromotive force, and second electromotive force is the part of compensation first electromotive force oppositely, so that the voltage of output is steady; S204 can the unit outputs to the surge protection unit with exchanging of inducing of compensating unit with getting, so that device is subsequently avoided impacting; S206 will export rectification filtering unit to through the interchange of surge protection unit, be direct current with the current conversion that will obtain jointly, and direct current is carried out filtering; And S208, carry out voltage stabilizing and the voltage after the voltage stabilizing is reduced to suitable constant voltage output by the output voltage of lowering and stabilizing blood pressure unit rectification filtering unit.
Wherein, the bucking coil differential concatenation of getting energy coil and compensating unit of getting the energy unit inserts.The initial permeability of getting the energy magnetic core of getting the energy unit is higher than the initial permeability of the compensation magnetic core of compensating unit.
Particularly, below be illustrated.Get and can select for use cold-rolled silicon steel tape to make by magnetic core, the compensation magnetic core can select for use galvanized iron sheet to be made as example.Get and to form the annulus magnetic core with the compensation magnetic core by the semicircular ring that two monolithic magnetic materials build up by magnetic core.Magnetic core internal diameter 60mm, external diameter 84mm.Wherein, get energy magnetic core height 18mm, get energy coil 250 circles; Compensation magnetic core height 15mm, bucking coil 250 circles; Get the enamel covered wire that energy coil and bucking coil are 0.29mm.
Table 1 does not add compensation and the power output (identical load) that adds after compensating
| High-tension line electric current (A) | 20 | 50 | 100 | 200 | 300 | 400 | 500 | 600 | 800 |
| Do not add compensation power output (W) | 0.272 | 1.066 | 2.446 | 3.297 | 6.880 | 8.131 | 9.396 | 10.614 | 12.181 |
| Add compensation back power output (W) | 0.243 | 0.474 | 0.391 | 0.334 | 0.323 | 0.340 | 0.344 | 0.341 | 0.342 |
As can be seen from Table 1, at line current hour, it is little than the coil power output loss that does not add compensation to add compensation back coil power output, when line current 20A, can provide the power that is not less than 200mW output.And during line current 100-800A, under the same load prerequisite, the coil power output that does not add compensation sharply rises, and dump power is bigger, and hear rate is bigger; The coil power output that adds after the compensation tends to be steady, and hear rate is less.The analysis showed that this compensation method is simply effective.
According to the present invention, change get can magnetic core, the magnetic material of compensation magnetic core, adjust get can coil, the number of turn of bucking coil, at line current hour, i.e. the ideal power of exportable satisfied application.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. a high voltage induction energy fetching power supply is used for obtaining power supply to power from high-voltage line, it is characterized in that, comprising:
Get the energy unit, be used for responding to first electromotive force from high-voltage line;
Compensating unit is used for responding to second electromotive force that is different from described first electromotive force from described high-voltage line, and by the reverse part that compensates described first electromotive force of described second electromotive force, so that the voltage of final output is steady;
The surge protection unit is connected to described energy unit and the described compensating unit got respectively, is used to make device subsequently to avoid impacting;
Rectification filtering unit is connected to described surge protection unit, is used for described getting can the unit be converted to direct current with exchanging of obtaining jointly of described compensating unit, and described direct current is carried out filtering; And
The lowering and stabilizing blood pressure unit is used for the output voltage of described rectification filtering unit is carried out voltage stabilizing and the voltage after the voltage stabilizing is reduced to suitable constant voltage output.
2. high voltage induction energy fetching power supply according to claim 1 is characterized in that, described getting can the unit comprises that get can coil and get can magnetic core, and described compensating unit comprises bucking coil and compensation magnetic core.
3. high voltage induction energy fetching power supply according to claim 2 is characterized in that, described getting can coil and the access of described bucking coil differential concatenation.
4. high voltage induction energy fetching power supply according to claim 3 is characterized in that, described initial permeability of getting the energy magnetic core is higher than the initial permeability of described compensation magnetic core.
5. high voltage induction energy fetching power supply according to claim 4 is characterized in that:
Described radius and the volume of getting energy magnetic core and described compensation magnetic core determined by needed power output; And
The described number of turn of getting energy coil and described bucking coil is determined by needed power output.
6. high voltage induction energy fetching power supply according to claim 4 is characterized in that, described surge protection unit also is used for lightning strike protection.
7. high voltage induction energy fetching power supply according to claim 4 is characterized in that, described getting can be made by cold rolled silicon steel by magnetic core, and described compensation magnetic core is made by galvanized iron sheet.
8. high voltage induction energy fetching power supply according to claim 4 is characterized in that, described getting can be made by permalloy or nanocrystalline material by magnetic core, and described compensation magnetic core is made by cold rolled silicon steel.
9. one kind is used for obtaining the method for power supply to power from high-voltage line, it is characterized in that, comprising:
Can respond to first electromotive force from high-voltage line in the unit by getting, second electromotive force that is different from described first electromotive force by compensating unit from described high-voltage line induction, wherein, described first electromotive force is higher than described second electromotive force, described second electromotive force is the part of described first electromotive force of compensation oppositely, so that the voltage of output is steady;
Described getting can the unit be outputed to the surge protection unit with exchanging of inducing of described compensating unit, so that device is subsequently avoided impacting;
To export rectification filtering unit to through the interchange of surge protection unit, being direct current, and described direct current be carried out filtering the described current conversion of obtaining jointly; And
Carry out voltage stabilizing and the voltage after the voltage stabilizing is reduced to suitable constant voltage output by the output voltage of lowering and stabilizing blood pressure unit described rectification filtering unit.
10. method according to claim 9 is characterized in that, the described bucking coil differential concatenation of getting energy coil and described compensating unit of getting the energy unit inserts.
11. method according to claim 10 is characterized in that, the described initial permeability of getting the energy magnetic core of getting the energy unit is higher than the initial permeability of the compensation magnetic core of described compensating unit.
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| CN110574754A (en) * | 2019-08-26 | 2019-12-17 | 国网新疆电力有限公司阿勒泰供电公司 | Visual monitoring bird repellent device of multi-functional transmission line |
| CN111650415A (en) * | 2020-06-09 | 2020-09-11 | 南京师范大学 | Self-powered current detection system and detection method for wide-current-band power transmission line |
| CN111650415B (en) * | 2020-06-09 | 2022-06-14 | 南京师范大学 | Self-powered current detection system and detection method for wide-current-band power transmission line |
| CN112566166A (en) * | 2020-11-10 | 2021-03-26 | 广西电网有限责任公司南宁供电局 | Self-healing ad hoc network communication system of smart power grid |
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