CN103675431A - Current collecting device on power transmission line - Google Patents
Current collecting device on power transmission line Download PDFInfo
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- CN103675431A CN103675431A CN201310643505.5A CN201310643505A CN103675431A CN 103675431 A CN103675431 A CN 103675431A CN 201310643505 A CN201310643505 A CN 201310643505A CN 103675431 A CN103675431 A CN 103675431A
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Abstract
The invention provides a current collecting device on a power transmission line, and belongs to the technical field of power equipment. The current collecting device solves the technical problem that in the prior art, an extra power supply is needed for power supply. The current collecting device comprises a power taking mutual inductance coil, a sampling mutual inductance coil, an analog-digital conversion circuit, an internal memory, a single chip microcomputer, a wireless signal transmitting module and a power supply arranging unit, wherein the power taking mutual inductance coil and the sampling mutual inductance coil are mutually independent, a secondary output winding on the power taking mutual inductance coil is in electric connection with the power supply arranging unit, and the power supply arranging unit can carry out rectification, voltage stabilization and over-voltage protection on currents output by the secondary output winding. The current collecting device has the function of directly obtaining induction currents from the power transmission line and an extra low-voltage direct-current power supply is omitted; the magnitude of voltage on the power transmission line cannot influence operation of the collecting device, and the function of being free of being influenced by the magnitude of the voltage is achieved.
Description
Technical field
The invention belongs to electrical equipment technical field, relate to the current collecting device on a kind of electric power transmission line.
Background technology
In power transmission and distribution link, in order to realize automatic management, need to measure the operational factor of power circuit, particularly the measurement of line current.
Its electronic unit of measurement mechanism needs power supply, and at present the measurement mechanism on mesohigh circuit generally adopts the modes such as PT power supply, auxiliary low pressure Power supply, solar powered and optical fiber power supply.First two mode all needs to consider High-Voltage Insulation in device design, so device volume is all larger, and installs inconvenient; The solar powered cost that exists is high, and complicated problem is installed; Optical fiber power supply needs fiber plant, the shorter requirement that cannot meet long-time running of optical device life-span simultaneously.
A kind of current collecting device as disclosed in patent (CN201220494152.8), comprising: current-to-voltage convertor, signal picker, processor and optical signal converter; Current-to-voltage convertor is connected with collector, and collector is connected with processor, and processor is connected with optical signal converter; Current-to-voltage convertor is analog voltage signal by the SVG current conversion receiving and sends to described signal picker; Signal picker gathers analog voltage signal and is converted to digital voltage signal and sends to processor; Processor is encoded and is treated to coded signal and sends to optical signal converter digital voltage signal; Optical signal converter carries out electric light by coded signal and is converted to light data-signal and sends to outside controller.The utility model, by entering current collecting device in SVG termination, shortens the transmission range of simulating signal greatly, and antijamming capability strengthens greatly, thereby makes SVG realize high-precision reactive-load compensation, realizes the more stable control of system voltage.But this harvester also exists the drawback of above-mentioned power supply.
Along with the development of electronic technology, the working current of a lot of metering circuits only needs several milliamperes, can adopt electric current inductive power supply completely.The occasion that only need to measure electric current at some is used electric current inductive power supply just need not consider voltage insulation problem, has greatly simplified design, reduces device volume.
Summary of the invention
The object of the invention is the problems referred to above that exist for existing technology, current collecting device on a kind of electric power transmission line is provided, its technical matters to be solved is: realize the current signal utilizing on mutual inductor induction line and power to electronic component in device, save extra power supply.
Object of the present invention can realize by following technical proposal:
A current collecting device on electric power transmission line, is characterized in that, this harvester comprises that power taking mutual inductor, sampling mutual inductor, analog to digital conversion circuit, internal storage, single-chip microcomputer and power supply arrange unit.Power taking secondary output winding on described power taking mutual inductor arranges the mutually electric connection in unit with described power supply; described power supply arranges unit can carry out rectification, voltage stabilizing and overvoltage protection to the electric current of described power taking secondary output winding output, and described power supply arranges unit the electric current after arranging is flowed to single-chip microcomputer and internal storage.The variation of the electric current of described sampling mutual inductor on can induction power transmission line of electricity is also carried simulating signal to analog to digital conversion circuit, analog to digital conversion circuit is digital signal by analog-signal transitions and sends single-chip microcomputer to, single-chip microcomputer receiving digital signals carries out logical calculated and to internal storage output current numerical value, internal storage received current numerical value also stores.
Its principle is as follows: power taking mutual inductor can connection mutually electric with the transmission line of electricity of free voltage specification; by the curent change on induction transmission line of electricity, on power taking secondary output winding, produce output current; the electric current that power taking secondary output winding produces arranges unit by power supply to carry out after rectification, voltage stabilizing and overvoltage protection; what become can be utilized by electronic components such as single-chip microcomputer and internal storages; thereby realized this harvester and directly from transmission line of electricity, obtained faradic function, saved extra low-voltage dc power supply.The height of the voltage on transmission line of electricity all can not affect the work of harvester, has realized the function of ignoring high-low pressure.
In current collecting device on above-mentioned a kind of electric power transmission line, described harvester also comprises a wireless signal transmitting module, described wireless signal transmitting module arranges the mutually electric connection in unit with power supply and realizes power supply, this wireless signal transmitting module is also connected with single-chip microcomputer, by single-chip microcomputer read internal storage and by the outside wireless transmit of the current values of its storage to remote object.Be designed with after wireless signal transmitting module, can realize long-range control, improve the automaticity of system.
In current collecting device on above-mentioned a kind of electric power transmission line; described power supply arranges unit and comprises overvoltage crowbar, rectification circuit and mu balanced circuit; described overvoltage crowbar carries out overvoltage protection to single-chip microcomputer, internal storage; described rectification circuit carries out rectification to the electric current of power taking secondary output winding output, and described mu balanced circuit carries out voltage stabilizing to the electric current of power taking secondary output winding output.The induction current of exporting on power taking secondary output winding is unstable and changes, must after overcommutation and voltage stabilizing, could be utilized by electronic component.
In current collecting device on above-mentioned a kind of electric power transmission line, between analog-digital conversion circuit as described and single-chip microcomputer, by digital communication interface, connect, described interior magazine is connected by digital communication interface with single-chip microcomputer and wireless signal transmission mould.Interface for digital communication is different with common electric connection, and this interface can transmit the digital signal of more complicated.
In current collecting device on above-mentioned a kind of electric power transmission line, described power taking mutual inductor and sampling mutual inductor are separate, electric power transmission line is through power taking mutual inductor and sampling mutual inductor and as a winding of coil, power taking mutual inductor and sampling mutual inductor separately induction power transmission line of electricity electric current the Secondary Winding output current signal by separately and by the circuit of follow-up connection, utilized, be designed with to be like this beneficial to and keep the job stability of phase connection circuit separately, avoid phase mutual interference.
Compared with prior art, advantage of the present invention is as follows:
1, this harvester directly obtains faradic function from transmission line of electricity, has saved extra low-voltage dc power supply.The height of the voltage on transmission line of electricity all can not affect the work of harvester, has realized the function of ignoring high-low pressure.
Accompanying drawing explanation
Fig. 1 is the circuit structure block diagram of current collecting device.
In figure, 1 power taking mutual inductor; 2 sampling mutual inductors; 3 analog to digital conversion circuits; 4 internal storages; 5 single-chip microcomputers; 6 power supplys arrange unit; 7 wireless signal transmitting module; 8 overvoltage crowbars; 9 rectification circuits; 10 mu balanced circuits; 11 power taking secondary output windings; 12 sampling secondary output windings.
Embodiment
Be below specific embodiments of the invention by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiment.
As shown in Figure 1; this harvester comprises that power taking mutual inductor 1, sampling mutual inductor 2, analog to digital conversion circuit 3, internal storage 4, single-chip microcomputer 5 and power supply arrange unit 6; power taking mutual inductor 1 and sampling mutual inductor 2 are separate; secondary output winding 11 on power taking mutual inductor 1 arranges the mutually electric connection in unit 6 with power supply; power supply arranges the electric current that can export winding 11 outputs to secondary in unit 6 and carries out rectification, voltage stabilizing and overvoltage protection, and power supply arranges unit 6 electric current after arranging is flowed to single-chip microcomputer 5 and internal storage 4.The variation of the electric current of sampling mutual inductor 2 on can induction power transmission line of electricity is also carried simulating signals to analog to digital conversion circuit 3, analog to digital conversion circuit 3 is digital signal by analog-signal transitions and sends single-chip microcomputer 5 to, single-chip microcomputer 5 receiving digital signals carry out logical calculated and to internal storage 4 output current numerical value, internal storage 4 received current numerical value also store.Sampling mutual inductor 2 has sampling secondary output winding 12.
Harvester also comprises a wireless signal transmitting module 7, wireless signal transmitting module 7 arranges the mutually electric connection in unit 6 with power supply and realizes power supply, this wireless signal transmitting module 7 also and single-chip microcomputer 5 be connected, by single-chip microcomputer 5 read internal storage 4 and by the current values of its storage by wireless transmit to remote object.Be designed with after wireless signal transmitting module 7, can realize long-range control, improve the automaticity of system.Power supply arranges unit 6 and comprises overvoltage crowbar 8, rectification circuit 9 and mu balanced circuit 10; 8 pairs of single-chip microcomputers 5 of overvoltage crowbar, internal storage 4 carry out overvoltage protection; the electric current of 9 pairs of secondary output windings of rectification circuit, 11 outputs carries out rectification, and the electric current of 10 pairs of secondary output windings of mu balanced circuit, 11 outputs carries out voltage stabilizing.On secondary output winding 11, the induction current of output is unstable and changes, and must after overcommutation and voltage stabilizing, could be utilized by electronic component.Between analog to digital conversion circuit 3 and sampling mutual inductor 2 and single-chip microcomputer 5, by digital communication interface, connect, interior magazine is connected by digital communication interface with single-chip microcomputer 5 and wireless signal transmission mould.Interface for digital communication is different with common electric connection, and this interface can transmit the digital signal of more complicated.Power taking mutual inductor 1 and sampling mutual inductor 2 are separate, electric power transmission line is through power taking mutual inductor 1 and sampling mutual inductor 2 and as a winding of coil, power taking mutual inductor 1 and sampling mutual inductor 2 separately induction power transmission line of electricity electric current the Secondary Winding output current signal by separately and by the circuit of follow-up connection, utilized, be designed with to be like this beneficial to and keep the job stability of phase connection circuit separately, avoid phase mutual interference.
Power taking mutual inductor 1 comprises the secondary output winding 11 that it has, power taking mutual inductor 1 can connection mutually electric with the transmission line of electricity of free voltage specification, by the curent change on induction transmission line of electricity, on secondary output winding 11, produce output current, the electric current that secondary output winding 11 produces arranges unit 6 by power supply and carries out rectification, after voltage stabilizing and overvoltage protection, what become can be utilized by electronic components such as single-chip microcomputer 5 and internal storages 4, thereby realized this harvester and directly from transmission line of electricity, obtained faradic function, saved extra low-voltage dc power supply.The height of the voltage on transmission line of electricity all can not affect the work of harvester, has realized the function of ignoring high-low pressure.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various modifications or supplement or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (5)
1. the current collecting device on an electric power transmission line, it is characterized in that, this harvester comprises power taking mutual inductor (1), sampling mutual inductor (2), analog to digital conversion circuit (3), internal storage (4), single-chip microcomputer (5) and power supply arrange unit (6), power taking secondary output winding (11) on described power taking mutual inductor (1) arranges the mutually electric connection in unit (6) with described power supply, described power supply arranges unit (6) can carry out rectification to the electric current of described power taking secondary output winding (11) output, voltage stabilizing and overvoltage protection, described power supply arranges unit (6) electric current after arranging is flowed to single-chip microcomputer (5) and internal storage (4), the variation of the electric current of described sampling mutual inductor (2) on can induction power transmission line of electricity is also carried simulating signal to analog to digital conversion circuit (3), analog to digital conversion circuit (3) is digital signal by analog-signal transitions and sends single-chip microcomputer (5) to, single-chip microcomputer (5) receiving digital signals carries out logical calculated and to internal storage (4) output current numerical value, internal storage (4) received current numerical value also stores.
2. the current collecting device on a kind of electric power transmission line according to claim 1, it is characterized in that, described harvester also comprises a wireless signal transmitting module (7), described wireless signal transmitting module (7) arranges the mutually electric connection in unit (6) with power supply and realizes power supply, this wireless signal transmitting module (7) also and single-chip microcomputer (5) be connected, by single-chip microcomputer (5) read internal storage (4) and by the outside wireless transmit of the current values of its storage to remote object.
3. the current collecting device on a kind of electric power transmission line according to claim 1 and 2; it is characterized in that; described power supply arranges unit (6) and comprises overvoltage crowbar (8), rectification circuit (9) and mu balanced circuit (10); described overvoltage crowbar (8) carries out overvoltage protection to single-chip microcomputer (5), internal storage (4); described rectification circuit (9) carries out rectification to the electric current of power taking secondary output winding (11) output, and described mu balanced circuit (10) carries out voltage stabilizing to the electric current of power taking secondary output winding (11) output.
4. the current collecting device on a kind of electric power transmission line according to claim 3, it is characterized in that, between analog-digital conversion circuit as described (3) and single-chip microcomputer (5), by digital communication interface, connect, described interior magazine is connected by digital communication interface with single-chip microcomputer (5) and wireless signal transmission mould.
5. the current collecting device on a kind of electric power transmission line according to claim 3, it is characterized in that, described power taking mutual inductor (1) and sampling mutual inductor (2) are separate, electric power transmission line is through power taking mutual inductor (1) and the mutual inductor (2) as a winding of coil of sampling, sampling mutual inductor (2) has sampling secondary output winding (12), power taking mutual inductor (1) and sampling mutual inductor (2) separately induction power transmission line of electricity electric current the output winding output current signal of the secondary by separately and by the circuit of follow-up connection, utilized.
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| CN201310643505.5A CN103675431A (en) | 2013-12-03 | 2013-12-03 | Current collecting device on power transmission line |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297600A (en) * | 2014-10-21 | 2015-01-21 | 国家电网公司 | Transformer voltage wireless measurement device |
| CN105182138A (en) * | 2015-09-28 | 2015-12-23 | 国网甘肃省电力公司 | Power inductor element inductance and saturation current measurement circuit |
| CN109617004A (en) * | 2018-11-23 | 2019-04-12 | 镇江市高等专科学校 | Protective type CT electricity getting device for Microcomputer Protection |
| CN111337727A (en) * | 2020-03-05 | 2020-06-26 | 山东泰开互感器有限公司 | Current transformer and cloud computing-based current transformer information interaction system |
| CN112763966A (en) * | 2020-12-31 | 2021-05-07 | 南京思仪科电气有限公司 | Digital wireless mutual inductance system |
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| US5552978A (en) * | 1993-06-10 | 1996-09-03 | Gec Alsthom T & D Sa | Device for supplying a voltage to an electronic circuit, in particular an electronic circuit associated with a current sensor disposed on an electrical line |
| CN101728076A (en) * | 2010-01-13 | 2010-06-09 | 武汉本杰明自动化设备工程有限公司 | Micropower infrared-communication current transformer |
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| CN102590574A (en) * | 2012-03-14 | 2012-07-18 | 昆明迪森电气有限公司 | Digital current transformer based on induction power supply and monitoring method for digital current transformer |
| CN203014502U (en) * | 2013-01-14 | 2013-06-19 | 厦门大学 | A high-voltage-side inductive electricity acquiring device |
| CN203085344U (en) * | 2012-07-12 | 2013-07-24 | 广州智天电子科技有限公司 | Integrated digital current transformer |
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Patent Citations (6)
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| US5552978A (en) * | 1993-06-10 | 1996-09-03 | Gec Alsthom T & D Sa | Device for supplying a voltage to an electronic circuit, in particular an electronic circuit associated with a current sensor disposed on an electrical line |
| CN101728076A (en) * | 2010-01-13 | 2010-06-09 | 武汉本杰明自动化设备工程有限公司 | Micropower infrared-communication current transformer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297600A (en) * | 2014-10-21 | 2015-01-21 | 国家电网公司 | Transformer voltage wireless measurement device |
| CN105182138A (en) * | 2015-09-28 | 2015-12-23 | 国网甘肃省电力公司 | Power inductor element inductance and saturation current measurement circuit |
| CN105182138B (en) * | 2015-09-28 | 2018-01-16 | 国网甘肃省电力公司 | Power inductance component inductance value and saturation current measuring circuit |
| CN109617004A (en) * | 2018-11-23 | 2019-04-12 | 镇江市高等专科学校 | Protective type CT electricity getting device for Microcomputer Protection |
| CN111337727A (en) * | 2020-03-05 | 2020-06-26 | 山东泰开互感器有限公司 | Current transformer and cloud computing-based current transformer information interaction system |
| CN112763966A (en) * | 2020-12-31 | 2021-05-07 | 南京思仪科电气有限公司 | Digital wireless mutual inductance system |
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Application publication date: 20140326 |