CN204719111U - A kind of low-power consumption photoelectric hybrid ultra-high-tension power transmission line current sensing means - Google Patents
A kind of low-power consumption photoelectric hybrid ultra-high-tension power transmission line current sensing means Download PDFInfo
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- CN204719111U CN204719111U CN201420731709.4U CN201420731709U CN204719111U CN 204719111 U CN204719111 U CN 204719111U CN 201420731709 U CN201420731709 U CN 201420731709U CN 204719111 U CN204719111 U CN 204719111U
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Abstract
The utility model provides a kind of low-power consumption photoelectric hybrid ultra-high-tension power transmission line current sensing means.This current sensing means comprises ultra-high-tension power transmission line current acquisition part and photoelectric signal transformation hop composition; Ultra-high-tension power transmission line current acquisition part comprises magnetic potentiometer, integrating circuit, voltage/frequency change-over circuit, iron-core-free current transformer and mutual inductance electric current mu balanced circuit; Photoelectric signal transformation hop comprises photoelectric commutator, signal processor and communication module; Magnetic potentiometer gathers current signal and exports voltage signal to voltage/frequency change-over circuit by integrating circuit, voltage signal is converted to frequency modulated signal, by photoelectric commutator and signal processor, current detection value transmitted by communication module, improve the stability of ultra-high-tension power transmission line current detecting, reduce the power consumption of conventional AC current sensor.
Description
Technical field
The utility model relates to a kind of current sensing means, particularly relates to a kind of low-power consumption photoelectric hybrid ultra-high-tension power transmission line current sensing means.
Background technology
Under the driving of China's industrial development upgrading, the security of power equipment uses and more and more comes into one's own.Current sensor has the instrument of protectiveness and supervisory function bit concurrently as one, will play prior meaning in the electrical network in future.Compare same kind of products at abroad, domestic current sensing techniques also has very large gap to need make up and improve.
Along with the increase of urban power consumption, make power-supply unit often be in overload preassembled condition, the test that power-supply device faces is also increasing, and the fault of electronic equipment 60% is all from power supply.Along with the seriousness that power issue becomes increasingly conspicuous; power technology is paid attention to by lots of manufacturers gradually; have sensing detection, sense samples, sensing protection power technology gradually become trend, the equipment of protection power source is also born thereupon, detects the sensor of curtage and arises at the historic moment.
Current sensor refers to can experience tested electric current and the sensor converting usable output signal to, and purposes at home and abroad widely.
Current sensor exports the electric power of transformer station and monitors, and can reduce the power off time that local power network fault causes.Current sensor can carry out current monitoring to service cable, if cable outlet overload, these current sensors by a part of load transfer plan in other phases, or in the new cable laid, can protect safe handling and the operation of cable.
AC current sensor (AC current sensor, AC current transducer) be a kind of device detecting alternating current, the information of tested alternating current can be experienced, and can will detect the information experienced, the information being for conversion into electric signal or other desired forms according to certain rules exports, to meet the requirements such as the transmission of information, process, storage, display, record and control.It is the primary link realizing automatically detecting and automatically controlling.According to the principle of induction of sensitive element, AC current sensor can be divided into: electromagnetic current transducer, Luo-coil, AnyWay variable-frequency electric flow sensor, Hall current sensor etc.
At present, the current measurement that electric system is applied is all completed by the current transformer of ribbon core.This kind of current sensor is along with the raising of line voltage grade, and its volume, weight and the open circuit loss of itself all increase very fast, and power consumption is very high, and price is also high.Iron core not only introduces the measuring error such as ratio and angular difference, but also there is multifold nonlinear factors, and as magnetic saturation, eddy effect, copper loss and magnetic hysteresis loss etc., these all have a great impact measuring accuracy and measurement range.In addition, installation, the maintenance of CT are all extremely inconvenient, easily cause personal safety accident.
In the last few years, due to the development of optical fiber technology, there is fibre optic current sensor method for sensing, cardinal principle is the Faraday effect utilizing magneto-optical crystal. according to of=VB1, by the measurement to Faraday rotation angle 0F, the magnetic field intensity that electric current produces can be obtained, thus can size of current be calculated.
Shortcomings such as although the High-Voltage Insulation problem it solved existing for traditional CT and safety problem, also exist technical requirement high, be easily affected by the external environment, expensive.Especially, fibre optic current sensor is very responsive to rotation, and because transmission line of electricity mostly is the built on stilts work condition state in field, environmental perturbation many factors, exists more misjudgment phenomenon in actual applications.
Visible, no matter be that traditional AC current sensor or the fibre optic current sensor of development in recent years all exist technical matters in the current detecting of ultra-high-tension power transmission line.
Utility model content
The purpose of this utility model is stability for improving ultra-high-tension power transmission line current detecting, the power consumption reducing conventional AC current sensor, provide a kind of low-power consumption photoelectric hybrid ultra-high-tension power transmission line current sensing means, technical matters to be solved is large, easily scaling loss, communication capacity difference the problem of the power consumption that traditional AC current sensor exists in the current detecting of ultra-high-tension power transmission line, overcomes the undulatory property problem that is large, that easily report by mistake that fibre optic current sensor exists in the current detecting of ultra-high-tension power transmission line simultaneously.
Concrete, the utility model is achieved through the following technical solutions:
First, the utility model provides a kind of low-power consumption photoelectric hybrid ultra-high-tension power transmission line current sensing means, it is characterized in that, described current sensing means comprises ultra-high-tension power transmission line current acquisition part and photoelectric signal transformation hop composition; Described ultra-high-tension power transmission line current acquisition part comprises magnetic potentiometer, integrating circuit, voltage/frequency change-over circuit, iron-core-free current transformer and mutual inductance electric current mu balanced circuit; Described photoelectric signal transformation hop comprises photoelectric commutator, signal processor and communication module; Described magnetic potentiometer is made up of non magnetic annulus and equally distributed densely packed coil, ultra-high-tension power transmission line is through described non magnetic annulus, two taps of described densely packed coil are connected with integrating circuit, voltage signal is exported to described voltage/frequency change-over circuit and voltage signal is converted to frequency modulated signal by described integrating circuit, described voltage/frequency change-over circuit is connected with described photoelectric commutator, described photoelectric commutator is connected with signal processor by optical fiber, and current detection value is transmitted by communication module by described signal processor; Ultra-high-tension power transmission line is through described iron-core-free current transformer, described iron-core-free current transformer be connected with mutual induction power-supply mu balanced circuit and export low pressure to integrating circuit, voltage/frequency change-over circuit as the reference voltage, and to power for photoelectric signal transformation hop.
Further, to go forward side by side a step-down low-power consumption for improving the stability of integrating circuit, described integrating circuit adopts chopper-zero-stabilized integrated operational amplifier.
Further, according to the transmission of electricity feature of ultra-high-tension power transmission line, optionally, described voltage/frequency change-over circuit adopts voltage/frequency conversion integrated chip, and full scale is 150kHz, and nonlinearity erron is less than 0.05%, dynamic range is 100dB, and voltage reference exports as 1.00V.
Further, for reducing power consumption, be convenient to safeguard, described photoelectric commutator is light emitting diode.
Further, for providing reliable reference voltage and ensureing the job stability of relevant device, the output voltage of described mutual induction power-supply mu balanced circuit is 5-10V.
Further, according to real work needs and work condition environment, optionally, described communication module is wireless communication module, gsm communication module, 3G communication module or 4G communication module.
Further, for realizing the accurate acquisition of current data, reducing error, and avoiding unnecessary too high precision,
The no-load voltage ratio of described ultra-high-tension power transmission line current sensing means is 200: 1-200: 5.
The utility model has following technique effect compared to the fibre optic current sensor of traditional AC current sensor and development in recent years in the current detecting of ultra-high-tension power transmission line:
(1) integrated level is high, low in energy consumption.The utility model have employed widespread use in microelectronic and commercialization degree is high, the general voltage/frequency conversion integrated chip that industrial applications is stable, chopper-zero-stabilized integrated operational amplifier, signal processor and communication module, adopt integrated circuit to process low-voltage signal as far as possible, avoid the employing of high power consumption element, simultaneously, automatic electricity getting is powered, avoid accumulator, the application of solar cell etc., effectively reduce the externally fed of equipment, this weight being also conducive to whole equipment reduces, avoid the shortcoming that difficulty of construction during artificial installation exercise is large.
(2) detection sensitivity is arranged appropriately.In conjunction with the work characteristics of ultra-high-tension power transmission line, the utility model avoids high-precision power consumption and maintains and hardware device high cost, avoids the shortcoming that rate of false alarm is high simultaneously.
(3) remote monitoring is convenient.The introducing of communication module is conducive to realizing remote monitoring, decreases workload and the work difficulty of line data-logging.
Accompanying drawing explanation
Fig. 1 is the general structure schematic diagram of low-power consumption photoelectric hybrid ultra-high-tension power transmission line current sensing means in the utility model.
Fig. 2 is the equivalent circuit diagram of integrating circuit in the utility model.
Fig. 3 is the circuit structure diagram of mutual inductance electric current mu balanced circuit in the utility model.
Embodiment
For making the technical solution of the utility model and technique effect thereof clearly, clearly, be further described below in conjunction with Fig. 1-3 pairs of the utility model embodiments.Should be appreciated that following embodiment only in order to explain the present invention, and be not used in restriction the utility model.
With reference to accompanying drawing 1, this embodiment provides a kind of low-power consumption photoelectric hybrid ultra-high-tension power transmission line current sensing means, and this current sensing means comprises two parts, as in accompanying drawing 1, two wire frames illustrate.
First, ultra-high-tension power transmission line current acquisition part, the i.e. direct and interactional part of ultra-high-tension power transmission line, different from current transformer of the prior art, the current signal of this part not adopts the cored Current Mutual Inductance coil of band to respond to, but directly adopts coil to carry out the collection of signal.
Concrete structure is: ultra-high-tension power transmission line current acquisition part comprises magnetic potentiometer, integrating circuit, voltage/frequency change-over circuit, iron-core-free current transformer and mutual inductance electric current mu balanced circuit.
For the effect between clearly each structure, again this part is divided into two minor structures, (1) magnetic potentiometer, integrating circuit, voltage/frequency change-over circuit form the first minor structure, and major function is the collection of current signal; (2) iron-core-free current transformer and mutual inductance electric current mu balanced circuit form the second minor structure, and major function is as power supply, to replace additional power source of the prior art, can provide reference voltage for the associated component of the first minor structure simultaneously.For providing reliable reference voltage and ensureing the job stability of relevant device, the output voltage of described mutual induction power-supply mu balanced circuit is 5-10V.According to the transmission of electricity feature of ultra-high-tension power transmission line, optionally, described voltage/frequency change-over circuit adopts voltage/frequency conversion integrated chip, and full scale is 150kHz, and nonlinearity erron is less than 0.05%, and dynamic range is 100dB, and voltage reference exports as 1.00V.
Magnetic potentiometer is made up of non magnetic annulus and equally distributed densely packed coil, ultra-high-tension power transmission line is through described non magnetic annulus, two taps of described densely packed coil are connected with integrating circuit, and voltage signal is exported to described voltage/frequency change-over circuit and voltage signal is converted to frequency modulated signal by described integrating circuit.
As shown in Figure 2, any integrated chip of equivalent electrical circuit general in this area can be adopted in this embodiment, such as ICL7650 integrated chip, to go forward side by side a step-down low-power consumption for improving the stability of integrating circuit, described integrating circuit adopts chopper-zero-stabilized integrated operational amplifier.
As shown in Figure 3, in second minor structure of this embodiment, ultra-high-tension power transmission line is through described iron-core-free current transformer, described iron-core-free current transformer be connected with mutual induction power-supply mu balanced circuit and export low pressure to integrating circuit, voltage/frequency change-over circuit as the reference voltage, and to power for photoelectric signal transformation hop.Its electrical block diagram as shown in Figure 3, it is the structural drawing that mu balanced circuit is provided general in this area, wherein voltage stabilizing chip is also general device, such as voltage stabilizing chip LM293, can provide the voltage of+5V to export, and can be used in conjunction with other general integrated chips, reference voltage is provided, simultaneously with accumulator coupling, also can be used as power supply and export, for other consuming parts as power supply.
This part be designed with following technique effect and advantage: integrated level is high, low in energy consumption.Have employed widespread use in microelectronic and commercialization degree is high, industrial applications is stable general voltage/frequency conversion integrated chip, chopper-zero-stabilized integrated operational amplifier, signal processor and communication module, adopt integrated circuit to process low-voltage signal as far as possible, avoid the employing of high power consumption element, simultaneously, automatic electricity getting is powered, avoid the application of accumulator, solar cell etc., effectively reduce the externally fed of equipment, this weight being also conducive to whole equipment reduces, and avoids the shortcoming that difficulty of construction during artificial installation exercise is large.
Secondly, photoelectric signal transformation hop comprises photoelectric commutator, signal processor and communication module; Described voltage/frequency change-over circuit is connected with described photoelectric commutator, and described photoelectric commutator is connected with signal processor by optical fiber, and current detection value is transmitted by communication module by described signal processor.For reducing power consumption, be convenient to safeguard, described photoelectric commutator is light emitting diode.According to real work needs and work condition environment, optionally, described communication module is wireless communication module, gsm communication module, 3G communication module or 4G communication module.The introducing of communication module is conducive to realizing remote monitoring, decreases workload and the work difficulty of line data-logging.Especially, the transmission speed of 4G module is fast, and volume of transmitted data is large, is conducive to realizing the data transmission under long-range, complicated landform and network monitoring.
For realizing the accurate acquisition of current data, reduce error, and avoid unnecessary too high precision, the no-load voltage ratio of described ultra-high-tension power transmission line current sensing means is 200: 1-200: 5.This device detection sensitivity arranges appropriately, and in conjunction with the work characteristics of ultra-high-tension power transmission line, the utility model avoids high-precision power consumption and maintains and hardware device high cost, avoids the shortcoming that rate of false alarm is high simultaneously.
Should be understood that; structure of the present utility model, application, selecting etc. of concrete parts are not limited to above-mentioned citing; to those skilled in the art's send a letter here, can be improved according to the above description or convert, all these improve and conversion all should belong to protection domain of the present utility model.
Claims (7)
1. a low-power consumption photoelectric hybrid ultra-high-tension power transmission line current sensing means, is characterized in that, described current sensing means comprises ultra-high-tension power transmission line current acquisition part and photoelectric signal transformation hop composition; Described ultra-high-tension power transmission line current acquisition part comprises magnetic potentiometer, integrating circuit, voltage/frequency change-over circuit, iron-core-free current transformer and mutual inductance electric current mu balanced circuit; Described photoelectric signal transformation hop comprises photoelectric commutator, signal processor and communication module; Described magnetic potentiometer is made up of non magnetic annulus and equally distributed densely packed coil, ultra-high-tension power transmission line is through described non magnetic annulus, two taps of described densely packed coil are connected with integrating circuit, voltage signal is exported to described voltage/frequency change-over circuit and voltage signal is converted to frequency modulated signal by described integrating circuit, described voltage/frequency change-over circuit is connected with described photoelectric commutator, described photoelectric commutator is connected with signal processor by optical fiber, and current detection value is transmitted by communication module by described signal processor; Ultra-high-tension power transmission line is through described iron-core-free current transformer, described iron-core-free current transformer be connected with mutual induction power-supply mu balanced circuit and export low pressure to integrating circuit, voltage/frequency change-over circuit as the reference voltage, and to power for photoelectric signal transformation hop.
2. low-power consumption photoelectric hybrid ultra-high-tension power transmission line current sensing means according to claim 1, described integrating circuit adopts chopper-zero-stabilized integrated operational amplifier.
3. low-power consumption photoelectric hybrid ultra-high-tension power transmission line current sensing means according to claim 1, described voltage/frequency change-over circuit adopts voltage/frequency conversion integrated chip, full scale is 150kHz, nonlinearity erron is less than 0.05%, dynamic range is 100dB, and voltage reference exports as 1.00V.
4. low-power consumption photoelectric hybrid ultra-high-tension power transmission line current sensing means according to claim 1, described photoelectric commutator is light emitting diode.
5. low-power consumption photoelectric hybrid ultra-high-tension power transmission line current sensing means according to claim 1, the output voltage of described mutual induction power-supply mu balanced circuit is 5-10V.
6. low-power consumption photoelectric hybrid ultra-high-tension power transmission line current sensing means according to claim 1, described communication module is wireless communication module, gsm communication module, 3G communication module or 4G communication module.
7. low-power consumption photoelectric hybrid ultra-high-tension power transmission line current sensing means according to claim 1, the no-load voltage ratio of described ultra-high-tension power transmission line current sensing means is 200: 1-200: 5.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420731709.4U CN204719111U (en) | 2014-12-01 | 2014-12-01 | A kind of low-power consumption photoelectric hybrid ultra-high-tension power transmission line current sensing means |
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| CN201420731709.4U CN204719111U (en) | 2014-12-01 | 2014-12-01 | A kind of low-power consumption photoelectric hybrid ultra-high-tension power transmission line current sensing means |
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| CN201420731709.4U Expired - Fee Related CN204719111U (en) | 2014-12-01 | 2014-12-01 | A kind of low-power consumption photoelectric hybrid ultra-high-tension power transmission line current sensing means |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108900194A (en) * | 2018-09-26 | 2018-11-27 | 北方电子研究院安徽有限公司 | A kind of power frequency conversion circuit that programmable multi-threshold compares |
| CN114527705A (en) * | 2022-02-17 | 2022-05-24 | 河南省奥瑞环保科技股份有限公司 | Energy-saving control management system for instruments and meters |
-
2014
- 2014-12-01 CN CN201420731709.4U patent/CN204719111U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108900194A (en) * | 2018-09-26 | 2018-11-27 | 北方电子研究院安徽有限公司 | A kind of power frequency conversion circuit that programmable multi-threshold compares |
| CN114527705A (en) * | 2022-02-17 | 2022-05-24 | 河南省奥瑞环保科技股份有限公司 | Energy-saving control management system for instruments and meters |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151021 Termination date: 20151201 |
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| EXPY | Termination of patent right or utility model |