CN102780273A - High-voltage wire magnetic field induction energy taking device for high-voltage transmission line online monitoring - Google Patents
High-voltage wire magnetic field induction energy taking device for high-voltage transmission line online monitoring Download PDFInfo
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- CN102780273A CN102780273A CN2012102410853A CN201210241085A CN102780273A CN 102780273 A CN102780273 A CN 102780273A CN 2012102410853 A CN2012102410853 A CN 2012102410853A CN 201210241085 A CN201210241085 A CN 201210241085A CN 102780273 A CN102780273 A CN 102780273A
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Abstract
The invention discloses a high-voltage wire magnetic field induction energy taking device for high-voltage transmission line online monitoring. The device comprises a coil (1), a rectification circuit (2), a switching circuit (3), a control circuit (4) and an energy storage circuit (5), wherein the coil is sleeved on a high-voltage wire; alternating current is induced from the high-voltage wire and is fed to the rectification circuit by utilizing the electromagnetic induction principle, the alternating current is converted into direct current through the rectification circuit and charges the energy storage circuit, and the switching circuit (3) is connected in parallel at the output end of the rectification circuit (2); and the control circuit detects output voltage of the energy storage circuit, so that the on/off of the switching circuit is controlled, and the energy storage circuit outputs voltage and current. The application range of the energy taking device is reduced, and the power loss of the switching circuit is reduced; because the switching circuit is positioned in a switch-on state for a long time in actual use, and the magnetic induction intensity in a magnetic core of the coil is low, the power loss of the magnetic core is reduced; and because the whole power loss of the energy taking device is reduced, the service life of the device is prolonged, and the stability and the reliability of the device are greatly improved.
Description
Technical field
The present invention relates to a kind of wire magnetic fields induction energy fetching device, especially relate to a kind of ultra-high-tension power transmission line on-line monitoring with high-voltage conducting wires magnetic field induction energy taking device.
Background technology
Along with science and technology development, the ultra-high-tension power transmission line field more and more needs the various physical parameters of charged detection line, and wherein considerable device will be suspended on the high voltage electricity transmission conductive wire, carry out the measurement of physical parameters such as conductor temperature, lead sag.Because these monitoring devices need be directly installed on the ultra-high-tension power transmission line, therefore adopting what mode is that the device power supply is the problem that we need emphasis to solve.Use at present more supply power mode and mainly contain solar powered, storage battery power supply, magnetic field induction power supply, laser powered sensor etc.The operation principle of storage battery is exactly the Changing Pattern that chemical energy and electric energy are changed each other, and this method is simple in structure, realizes than is easier to, but because the life of storage battery is shorter, wants the frequent change battery when using for a long time; And for solar powered; Solar cell is to utilize photoelectricity transformation principle to make the radiant light of the sun change a kind of device of electric energy into through semiconductor substance; Heliotechnics also needs further to improve its efficient at present; Particularly at long-time rainy weather, its flying power and stability can not get ensureing; The laser energy supply is to adopt laser or other light sources through optical fiber light energy to be sent to hot side from low potential side; Convert light energy into electric energy output by electrooptical device (photocell) again; This method life-span is shorter, cost an arm and a leg, and on-site maintenance is cumbersome.It can be nested coil on the high pressure current carrying conductor that magnetic field induction is got, and utilizes electromagnetic induction principle, and induction is from the electric current of the current amplitude proportion relation in the high-voltage conducting wires on coil.
At present to get the subject matter that can the aspect runs into be coil magnetic core saturation problem to magnetic field induction.Because the current amplitude excursion on the transmission line is very big; Change to kiloampere from tens amperes, can under the less situation of transmission line electric current, obtain enough electric energy by coil if want to get, and when the transmission line electrorheological is big; If do not take measures, then the magnetic core of coil is inevitable saturated.After magnetic core was saturated, the coil output voltage waveform seriously distorted, and produced the very high spike of amplitude, the safety of serious threat power device; And core loss increases, and heating is serious, even burns.
Therefore, adopt magnetic field induction get can key issue be how to suppress to get can magnetic core when big electric current the degree of depth saturated.In order to prevent that magnetic core is saturated, generally adopt following several kinds of measures:
1) getting and increasing air gap introducing air-gap reluctance on the magnetic core of coil, increases the magnetic core saturation current thereby reduce magnetic permeability.Though it is saturated that this method can suppress magnetic core, open air gap to magnetic core and cause magnetic field energy taking device starting current bigger, cause the voltage that the transmission line electric current hour is got can electric supply installation can't provide regulation; In addition, need the coil turn of coiling to increase, coiling work trouble; Also have, in running, thereby the vibration that is caused by the external world or equipment self produces may make the air gap distortion reduce the reliability of device.Generally speaking, open air gap to suppress magnetic field energy taking device magnetic core saturated possible, to implement very difficult though utilize.
2) increase bucking coil.The magnetic direction that bucking coil and transmission pressure produced is opposite; When the transmission line electric current was big, it was higher to get ability coil output voltage, and control circuit increases the electric current of bucking coil in view of the above; Make it the magnetic field that the partial offset transmission pressure is produced, thereby guarantee that the coil magnetic core is unsaturated.This method can suppress the wide moving range of primary current effectively to the energy taking device output voltage influence, but control strategy is complicated, and complicated circuit makes device reliability not high.
3) adopt elements such as triode, the bidirectional thyristor unnecessary electric energy of releasing.For example Chinese invention patent 201110323678.x is said, can draw control circuit by the coil output from getting, and control is parallel to triode, the bidirectional thyristor of getting ability coil output.When coil output voltage is excessive, bidirectional thyristor conducting, the electric current that lead coil is sensed.Element such as triode, bidirectional thyristor only is in complete conducting or fully just can long-term stable operation under the off state; Be in incomplete conducting or not exclusively off state, or between conducting state and off state frequent switching all can produce a large amount of power consumptions, cause element over-temperature to be burnt.
The problem of the control strategy of the described this energy taking device of Chinese invention patent 201110323678.x existence at present is that control circuit forms the aanalogvoltage feedback, the intensity of control signal and the proportional relation of the output voltage of device, that is and, control signal is an analog quantity.Therefore, there is strong and weak problem in control signal, at first; When the electric current of transmission line is in critical numerical value (, coil output voltage is near the maximum output voltage value), fainter from the control signal of control circuit output; Make that bidirectional thyristor is incomplete conducting; Also not exclusively turn-off, thereby produce huge power consumption, cause thyristor to burn very soon; Secondly, because this control strategy has formed negative feedback, so in the reality situation that the device output voltage tends towards stability gradually, control signal is faint gradually can appear; Particularly output voltage numerical value can constantly change near stable state output voltage numerical value back and forth; Thereby causing bidirectional thyristor is incomplete conducting, also not exclusively turn-offs, and the conversion of conducting state and off state will take place continually; Cause a large amount of power consumptions, thereby burn.
Summary of the invention
Technical problem to be solved by this invention, the ultra-high-tension power transmission line on-line monitoring that just provides a kind of stable performance is with high-voltage conducting wires magnetic field induction energy taking device.
The solution of above-mentioned technical problem, the technical scheme that the present invention adopts is following:
A kind of ultra-high-tension power transmission line on-line monitoring is with high-voltage conducting wires magnetic field induction energy taking device; It is characterized in that: comprise coil 1, rectification circuit 2, switching circuit 3, control circuit 4 and accumulator 5; Described coil 1 is enclosed within on the high-voltage conducting wires, utilizes electromagnetic induction principle to induce alternating current from high-voltage conducting wires and delivers to rectification circuit, and rectification circuit converts alternating current to direct current; And to the accumulator charging, switching circuit 3 is connected in parallel on the output of rectification circuit 2; Control circuit detects the output voltage of accumulator, the conducting of control switch circuit and shutoff according to this, accumulator 5 output voltage electric currents.
Described getting can adopt silicon steel sheet as magnetic core by coil 1; The silicon steel sheet core shapes is the annulus of internal diameter 80mm, external diameter 120mm, height 20mm; Be cut into two semicircles from the centre, be convenient to pincers and be enclosed within on the high voltage electricity transmission conductive wire, coil is that 1mm enamelled wire coiling 200 circles on magnetic core form by diameter.
Described rectification circuit 2 is the full-wave rectifying circuit that four general-purpose diodes are formed; Switching circuit 3 is a regular tap triode; Its emitter and collector is connected to the output of rectification circuit 2; Base stage connects control circuit 4, and control circuit 4 is made up of a common single-chip microcomputer and 2 voltage divider resistances being connected between the output of rectification circuit 2, and the end connection switching circuit 3 of single-chip microcomputer, the other end are connected in the middle of 2 divider resistances; And the accumulator 5 that is connected between the output of rectification circuit 2 is composed in series capacitor two ends output voltage electric current by capacitor and a general-purpose diode.
The output voltage of device is confirmed to export electric U in maximum
HExport electric U with minimum
LBetween, rather than a certain fixed numeric values.The control strategy of energy taking device is to export electric U when control circuit 4 detects accumulator 5 output voltages above the maximum of setting
HThe time, send Continuity signal to switching circuit 3, the switching circuit conducting, with the output short-circuit of coil, rectification circuit 2 does not have output current, not to accumulator 5 chargings; When detecting the minimum that accumulator 5 output voltages are lower than setting, control circuit 4 exports electric U
LThe time, sending cut-off signals to switching circuit 3, switching circuit 3 turn-offs, and the output current of coil 1 charges to accumulator 5 through rectification circuit 2.This control strategy drops to the action frequency of switching circuit 3 minimum, thereby has reduced switching circuit 3 because between conducting state and off state, switch the power consumption that is produced.
Control circuit is made up of microprocessor 6 and peripheral circuit thereof.Microprocessor 6 detects the output voltage of accumulator, carries out the automatic threshold comparative diagnoses, sends control signal corresponding.Therefore, control signal belongs to digital quantity, can guarantee that switching circuit 3 is in complete conducting state or complete off state, thereby avoids switching circuit 3 because of not exclusively conducting or incomplete the shutoff are burnt.
The present invention does not relate to the protection problem of shoving of energy taking device, and the existing safeguard measure of shoving can be used in combination with the present invention.
Beneficial effect: the advantage of patent of the present invention is, does not reduce the scope of application (both, the amplitude range of the electric current on the transmission pressure) of energy taking device, has reduced the power consumption of switching circuit as far as possible.Because in actual the use, switching circuit is in conducting state for a long time, the magnetic flux density in the coil magnetic core is very low, has therefore also reduced the power consumption of magnetic core.Because the energy taking device overall power reduces, its useful life, stability and reliability are all greatly improved.
Description of drawings
Fig. 1 is a principle schematic of the present invention;
Fig. 2 is embodiments of the invention.
Embodiment
Ultra-high-tension power transmission line on-line monitoring of the present invention is as shown in Figure 2 with high-voltage conducting wires magnetic field induction energy taking device embodiment; Comprise coil 1, rectification circuit 2, switching circuit 3, control circuit 4 and accumulator 5; Coil 1 is enclosed within on the high-voltage conducting wires, utilizes electromagnetic induction principle to induce alternating current from high-voltage conducting wires and delivers to rectification circuit 2, and rectification circuit 2 converts alternating current to direct current; And to accumulator 5 chargings, switching circuit 3 is connected in parallel on the output of rectification circuit 2; Control circuit 4 detects the output voltage of accumulator, the conducting of control switch circuit and shutoff according to this, accumulator 5 output voltage electric currents.
Get and can adopt silicon steel sheet as magnetic core by coil 1, the silicon steel sheet core shapes be the annulus of internal diameter 80mm, external diameter 120mm, height 20mm, is cut into two semicircles from the centre, is convenient to pincers and is enclosed within on the high voltage electricity transmission conductive wire.Coil is that 1mm enamelled wire coiling 200 circles on magnetic core form by diameter.
When switch triode turn-offed, the coil-induced electric current that goes out charged to capacitor through rectification circuit; When the switch triode conducting, the coil-induced electric current that goes out is released through switch triode, does not charge to capacitor.Capacitor provides electric energy to power device, and its output voltage reduces gradually, and the voltage that detects capacitor when single-chip microcomputer is lower than U
LThe time, send cut-off signals to switch triode; Switch triode turn-offs, and capacitor begins charging, and its voltage raises gradually; The voltage that detects capacitor when single-chip microcomputer is higher than U
HThe time, send Continuity signal to switch triode; Switch triode conducting, capacitor stop charging.
Claims (2)
1. a ultra-high-tension power transmission line on-line monitoring is with high-voltage conducting wires magnetic field induction energy taking device; It is characterized in that: comprise coil (1), rectification circuit (2), switching circuit (3), control circuit (4) and accumulator (5); Described coil (1) is enclosed within on the high-voltage conducting wires, induces alternating current and delivers to rectification circuit (2), and rectification circuit (2) converts alternating current to direct current; And to (5) road charging of energy storage electricity, switching circuit (3) is connected in parallel on the output of rectification circuit (2); Control circuit (4) detects the output voltage of accumulator (5), the conducting of control switch circuit and shutoff according to this, accumulator (5) output voltage electric current.
2. ultra-high-tension power transmission line on-line monitoring according to claim 1 is with high-voltage conducting wires magnetic field induction energy taking device; It is characterized in that: described rectification circuit (2) is the full-wave rectifying circuit that four general-purpose diodes are formed; Switching circuit (3) is a regular tap triode; Its emitter and collector is connected to the output of rectification circuit (2); Base stage connects control circuit (4), and control circuit (4) is made up of a common single-chip microcomputer and 2 voltage divider resistances being connected between the output of rectification circuit (2), and the end connection switching circuit (3) of single-chip microcomputer, the other end are connected in the middle of 2 divider resistances; And the accumulator (5) that is connected between the output of rectification circuit (2) is composed in series capacitor two ends output voltage electric current by capacitor and diode.
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| CN2012102410853A CN102780273A (en) | 2012-07-11 | 2012-07-11 | High-voltage wire magnetic field induction energy taking device for high-voltage transmission line online monitoring |
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| CN2012102410853A CN102780273A (en) | 2012-07-11 | 2012-07-11 | High-voltage wire magnetic field induction energy taking device for high-voltage transmission line online monitoring |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103036319A (en) * | 2012-12-10 | 2013-04-10 | 苏州金纳信息技术有限公司 | High-efficient power line electricity taking achieving device |
| CN103760431A (en) * | 2013-11-29 | 2014-04-30 | 国家电网公司 | Integrated online monitoring device of parallel capacitor |
| CN103808432A (en) * | 2014-03-10 | 2014-05-21 | 成都瑞霆科技有限公司 | Current induction electricity-taking wireless temperature measurement system with unclosed magnetic circuit, and micro-power-consumption communication method |
| CN105067883A (en) * | 2015-07-31 | 2015-11-18 | 广东电网有限责任公司电力科学研究院 | Time-frequency analysis method and time-frequency analysis system for intruding waves of power transformation equipment |
| CN106410868A (en) * | 2016-11-11 | 2017-02-15 | 广东电网有限责任公司电力科学研究院 | Rectifier-bridge-free power-taking circuit |
| CN107887984A (en) * | 2016-09-30 | 2018-04-06 | 通用电气公司 | Overvoltage protection for wireless power transmission system |
| CN111327083A (en) * | 2019-12-06 | 2020-06-23 | 横琴英飞铂智能科技有限公司 | Magnetic energy acquisition method, device and circuit for anti-magnetic saturation power 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 |
| CN114079319A (en) * | 2022-01-17 | 2022-02-22 | 南方电网数字电网研究院有限公司 | Power supply method, device, equipment and medium for integrated sensor in power transmission line |
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| CN1909327A (en) * | 2005-08-05 | 2007-02-07 | 西安华伟光电技术有限公司 | Self-activating power device gaining energy from power line magnetic field |
| WO2010136972A1 (en) * | 2009-05-26 | 2010-12-02 | Ellarjay Trading And Consulting (Pty) Ltd | Article of clothing |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103036319A (en) * | 2012-12-10 | 2013-04-10 | 苏州金纳信息技术有限公司 | High-efficient power line electricity taking achieving device |
| CN103760431A (en) * | 2013-11-29 | 2014-04-30 | 国家电网公司 | Integrated online monitoring device of parallel capacitor |
| CN103808432A (en) * | 2014-03-10 | 2014-05-21 | 成都瑞霆科技有限公司 | Current induction electricity-taking wireless temperature measurement system with unclosed magnetic circuit, and micro-power-consumption communication method |
| CN103808432B (en) * | 2014-03-10 | 2016-09-07 | 成都瑞霆科技有限公司 | Non-closed magnetic circuit electric current sensing power taking wireless temperature measurement system and the Micro Energy Lose means of communication |
| CN105067883A (en) * | 2015-07-31 | 2015-11-18 | 广东电网有限责任公司电力科学研究院 | Time-frequency analysis method and time-frequency analysis system for intruding waves of power transformation equipment |
| CN107887984A (en) * | 2016-09-30 | 2018-04-06 | 通用电气公司 | Overvoltage protection for wireless power transmission system |
| CN107887984B (en) * | 2016-09-30 | 2024-01-23 | 通用电气公司 | Overvoltage protection for wireless power transfer systems |
| CN106410868A (en) * | 2016-11-11 | 2017-02-15 | 广东电网有限责任公司电力科学研究院 | Rectifier-bridge-free power-taking circuit |
| CN106410868B (en) * | 2016-11-11 | 2019-03-29 | 广东电网有限责任公司电力科学研究院 | A kind of non-rectifying bridge power-supply circuit |
| CN111327083A (en) * | 2019-12-06 | 2020-06-23 | 横琴英飞铂智能科技有限公司 | Magnetic energy acquisition method, device and circuit for anti-magnetic saturation power transmission line |
| CN111327083B (en) * | 2019-12-06 | 2024-03-19 | 横琴英飞铂智能科技有限公司 | Anti-magnetic saturation transmission line magnetic energy acquisition method, device and circuit |
| 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 |
| CN114079319A (en) * | 2022-01-17 | 2022-02-22 | 南方电网数字电网研究院有限公司 | Power supply method, device, equipment and medium for integrated sensor in power transmission line |
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Application publication date: 20121114 |