CN103353545A - Voltage and current loop carrier wave isolation and attenuation equipment - Google Patents
Voltage and current loop carrier wave isolation and attenuation equipment Download PDFInfo
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- CN103353545A CN103353545A CN2013103068707A CN201310306870A CN103353545A CN 103353545 A CN103353545 A CN 103353545A CN 2013103068707 A CN2013103068707 A CN 2013103068707A CN 201310306870 A CN201310306870 A CN 201310306870A CN 103353545 A CN103353545 A CN 103353545A
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Abstract
The invention discloses voltage and current loop carrier wave isolation and attenuation equipment. The equipment is characterized by comprising an electric power input terminal as the input interface of electric power, an electric power high-frequency wave block device for blocking the high-frequency signals accessed in the electric power by the electric power input terminal, an electric power output terminal for accessing the electric power blocking the high-frequency signals to a detected ammeter, a carrier wave loading interface for loading carrier waves to the detected ammeter, and a detection output interface for outputting the signals generated by the detected ammeter. The equipment provided by the invention creates preconditions for related experiments.
Description
Technical field
The present invention relates to field of electrical equipment, relate in particular to a kind of electric current and voltage loop carrier wave isolation relaxation equipment.
Background technology
Voltage power-line carrier communication technology is a kind of local communication mode that adopts in intelligent grid, can realize well the various functions such as the collection of information, instruction issue, Real Time Monitoring, measure monitor.
Can't effectively examine the detection test that reason just is also not have corresponding equipment support to be correlated with in the prior art to the intelligent electric energy meter data reading system.
Summary of the invention
Technical matters to be solved by this invention provides a kind of electric current and voltage loop carrier wave isolation relaxation equipment.
For addressing the above problem, the present invention proposes a kind of electric current and voltage loop carrier wave isolation relaxation equipment, comprising:
Power input end is as the input interface of electric power;
The power high-frequency trap is for the high-frequency signal that intercepts electric power that described power input end accesses;
Power output end is used for the electric power of described obstruct high-frequency signal is accessed tested ammeter;
The carrier wave loading interface is used for carrier wave is loaded on described tested ammeter;
Detect output interface, be used for the signal output that described tested ammeter is produced.
Wherein, also comprise signal transformation circuit, it is connected the signal that is used for described tested ammeter produces and carries out shaping with described detection output interface.
Wherein, also comprise spacing output circuit, it is connected with described detection output interface, is used for the signal of described detection output interface output being isolated and exporting.
Wherein, also comprise carrier wave impedance follower, this carrier wave impedance follower is in the described loop that is loaded carrier wave, is used for exporting different impedances according to different carrier frequencies.
Wherein, also be provided with shaping circuit in the described carrier wave impedance follower, this shaping circuit is used for the signal that described tested ammeter produces is carried out shaping.
Wherein, described carrier wave impedance follower comprises signal input interface, signal output interface and selects circuit; This selection circuit is used for selecting different Frequency points and resistance value.
Wherein, described electric power is three-phase power, and described carrier wave impedance follower respectively corresponding described three-phase power is exported different impedances.
Wherein, described spacing output circuit comprises electrical to optical converter, photoelectric commutator and transmission channel, and this transmission channel connects described electrical to optical converter and photoelectric commutator, the outside output electrical signals of described photoelectric commutator.
Wherein, described power input end comprises voltage input end and current input terminal, and described power output end comprises voltage output end and current output terminal, and described power high-frequency trap comprises voltage high-frenquency current blocking device and electric current high-frenquency current blocking device; Described voltage high-frenquency current blocking device is connected between described voltage input end and the voltage output end, and described electric current high-frenquency current blocking device is connected between described current input terminal and the current output terminal.
Wherein, described carrier wave loading interface is for copying control device interface.
Wherein, the signal of described tested ammeter generation is pulse signal.
Owing to provided a kind of electric current and voltage loop carrier wave isolation relaxation equipment, this equipment provides the carrier wave isolating means for correlation test, has also satisfied the coherent detection that tested ammeter is applied carrier wave simultaneously among the present invention.
Description of drawings
Fig. 1 is the structural representation of an embodiment of a kind of electric current and voltage of the present invention loop carrier wave isolation relaxation equipment.
Embodiment
With reference to figure 1, illustrate the structural representation of an embodiment of a kind of electric current and voltage of the present invention loop carrier wave isolation relaxation equipment.As shown in the figure, comprise voltage input end 1, current input terminal 2, voltage high-frenquency current blocking device 3, electric current high-frenquency current blocking device 4, voltage output end 5, current output terminal 6, carrier wave loading interface 7, carrier wave impedance follower 8, spacing output circuit 9.
Described voltage high-frenquency current blocking device 3 is connected between described voltage input end 1 and the voltage output end 5, and described electric current high-frenquency current blocking device 4 is connected between described current input terminal 2 and the current output terminal 6.Output voltage and the electric current of described voltage output end 5 and electric current output 6 access tested ammeter (not shown).
7 of described carrier wave loading interfaces are loaded on described tested ammeter with carrier wave, specifically can be that the voltage and current that the carrier loop of described carrier wave loading interface 7 is incorporated described voltage output end 5 and current output terminal 6 outputs into accesses in the loop of tested ammeter.Preferably, described carrier wave loading interface 7 can multiplexingly be copied control device interface, is to be in the loop of tested ammeter because copy the control device.Flow to shown in the arrow among the figure and be the loop direction of carrier wave.
Described voltage high-frenquency current blocking device 3 is used for the high-frequency signal of the power-frequency voltage of voltage input end 1 access is carried out filtering, thinks that follow-up carrier wave loads test and creates relatively pure high frequency environment; Equally, described electric current high-frenquency current blocking device 4 is used for the high-frequency signal of the power current of current input terminal 2 accesses is carried out filtering, thinks that follow-up carrier wave loads test and creates relatively pure high frequency environment.In a preferred embodiment of the present invention, described voltage input end 1 is connected with current input terminal and is connected respectively voltage source and current source.
Described voltage high-frenquency current blocking device 3 and electric current high-frenquency current blocking device 4 can be to be made by the high-frequency core that is wound with coil, and each high-frequency core both sides is wound with coil, and between input end phase line and output terminal ground wire electric capacity transboundary.
Described carrier wave impedance follower 8 is used for as required when different frequencies the certain impedance of the carrier wave that loads output to described tested ammeter, to satisfy the detection demand.It comprises pulse input interface, pulse output interface, pulse shaping circuit, selection circuit, display circuit, serial communication interface.Wherein, described pulse input interface is used for receiving the pulse signal from described tested ammeter, described pulse shaping circuit then will output to the pulse output interface after this pulse signal shaping, this pulse output interface then with this output of pulse signal to spacing output circuit 9.Described selection circuit is used for for different Frequency point and the resistance values of user selection, and described display circuit is used for then showing interactive information that described serial communication interface then can accept to arrange the instruction of resistance value, to be used for Long-distance Control.Then simultaneously as the output interface of detection signal, the process of its output pulse signal namely is loaded on the pulse signal that produces in the loop behind the tested ammeter because this pulse signal is carrier wave in described carrier wave impedance follower 8 present embodiments.Described power supply is used for to described carrier wave impedance follower 8 power supplies.
Be appreciated that described pulse shaping circuit also can be from described carrier wave impedance follower 8 independent be to realize its function, no longer be further elaborated at this.
Electric power described in the present embodiment is three-phase electricity, and described carrier wave impedance follower 8 can arrange respectively corresponding impedance output to three-phase electricity.This equipment can be realized the carrier wave isolation to the voltage and current loop of three-phase power simultaneously.
Described spacing output circuit 9 comprises electrical to optical converter, photoelectric commutator and transmission channel, is optical fiber in this transmission channel present embodiment.Realize the conversion of electric signal to light signal by electrical to optical converter, and then can utilize optical fiber to transmit, then reduced output by photoelectric commutator.The conversion of described electric signal and light signal has realized the isolation of this equipment with outside miscellaneous equipment, has guaranteed equipment dependability and security.
Being appreciated that given in the present embodiment is that electric power is the situation of three-phase electricity (shown in the A among the figure, B, the C), and the situation when adopting other type electric power can obtain by above description in reasoning, thereby also no longer further sets forth.In addition, provided in the present embodiment at A and applied mutually carrier wave (among the figure shown in the arrow) in the electricity and apply the situation of impedance by described carrier wave impedance follower, it can certainly be other two-phase, or combination wherein, or three-phase electricity all loads carrier wave or impedance, because those skilled in the art can analogize according to above description and obtain, so repeat no more.
Among the present invention, because carrier wave isolation relaxation equipment in electric current and voltage loop is provided, so that the running detection under the carrier communication load condition becomes possibility to tested ammeter.By high-frequency signal was intercepted before entering into tested ammeter one side, thereby for follow-up detection provides pure environment, can effectively detect the working order that only loads tested ammeter under the carrier case.
Claims (10)
1. an electric current and voltage loop carrier wave isolation relaxation equipment is characterized in that, comprising:
Power input end is as the input interface of electric power;
The power high-frequency trap is for the high-frequency signal that intercepts electric power that described power input end accesses;
Power output end is used for the tested ammeter of electric power output access with described obstruct high-frequency signal;
The carrier wave loading interface is used for carrier wave is loaded on described tested ammeter;
Detect output interface, be used for the signal output that described tested ammeter is produced.
2. equipment as claimed in claim 1 is characterized in that, also comprises signal transformation circuit, and it is connected the signal that is used for described tested ammeter produces and carries out shaping with described detection output interface, and then output.
3. equipment as claimed in claim 1 is characterized in that, also comprises spacing output circuit, and it is connected with described detection output interface, for again output after the signal of described detection output interface output is isolated.
4. equipment as claimed in claim 1 is characterized in that, also comprises carrier wave impedance follower, and this carrier wave impedance follower is in the described loop that is loaded carrier wave, is used for the different impedance of different frequency output according to described loading carrier wave.
5. equipment as claimed in claim 4 is characterized in that, described carrier wave impedance follower comprises signal input interface, signal output interface and selects circuit; This selection circuit is used for selecting different Frequency points and resistance value.
6. equipment as claimed in claim 4 is characterized in that, described electric power is three-phase power, and described carrier wave impedance follower respectively corresponding described three-phase power is exported different impedances.
7. equipment as claimed in claim 3 is characterized in that, described spacing output circuit comprises electrical to optical converter, photoelectric commutator and transmission channel, and this transmission channel connects described electrical to optical converter and photoelectric commutator, the outside output electrical signals of described photoelectric commutator.
8. such as each described equipment in the claim 1 to 7, it is characterized in that, described power input end comprises voltage input end and current input terminal, described power output end comprises voltage output end and current output terminal, and described power high-frequency trap comprises voltage high-frenquency current blocking device and electric current high-frenquency current blocking device; Described voltage high-frenquency current blocking device is connected between described voltage input end and the voltage output end, and described electric current high-frenquency current blocking device is connected between described current input terminal and the current output terminal.
9. such as each described equipment in the claim 1 to 7, it is characterized in that described carrier wave loading interface is for copying control device interface.
10. such as each described equipment in the claim 1 to 7, it is characterized in that the signal that described tested ammeter produces is pulse signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310306870.7A CN103353545B (en) | 2013-07-22 | 2013-07-22 | Voltage and current loop carrier wave isolation and attenuation equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310306870.7A CN103353545B (en) | 2013-07-22 | 2013-07-22 | Voltage and current loop carrier wave isolation and attenuation equipment |
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| Publication Number | Publication Date |
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| CN103353545A true CN103353545A (en) | 2013-10-16 |
| CN103353545B CN103353545B (en) | 2015-06-10 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2285692A (en) * | 1993-03-13 | 1995-07-19 | Ampy Automation Digilog | Power meters |
| JP2000266791A (en) * | 1999-03-13 | 2000-09-29 | Korea Kumho Petrochem Co Ltd | Laplace transformation impedance measuring method and device thereof |
| CN201594823U (en) * | 2009-07-22 | 2010-09-29 | 冯汉春 | Power line carrier communication device |
| CN101944936A (en) * | 2010-09-06 | 2011-01-12 | 湖北省电力试验研究院 | Narrow band carrier reduction device applied to low voltage collected meter reading |
| CN201789501U (en) * | 2010-09-06 | 2011-04-06 | 湖北省电力试验研究院 | Narrowband carrier attenuation device applied to low-voltage centralized meter reading |
| CN202524395U (en) * | 2011-11-02 | 2012-11-07 | 华北电网有限公司计量中心 | General test platform for low-voltage carrier automatic meter reading system |
-
2013
- 2013-07-22 CN CN201310306870.7A patent/CN103353545B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2285692A (en) * | 1993-03-13 | 1995-07-19 | Ampy Automation Digilog | Power meters |
| JP2000266791A (en) * | 1999-03-13 | 2000-09-29 | Korea Kumho Petrochem Co Ltd | Laplace transformation impedance measuring method and device thereof |
| CN201594823U (en) * | 2009-07-22 | 2010-09-29 | 冯汉春 | Power line carrier communication device |
| CN101944936A (en) * | 2010-09-06 | 2011-01-12 | 湖北省电力试验研究院 | Narrow band carrier reduction device applied to low voltage collected meter reading |
| CN201789501U (en) * | 2010-09-06 | 2011-04-06 | 湖北省电力试验研究院 | Narrowband carrier attenuation device applied to low-voltage centralized meter reading |
| CN202524395U (en) * | 2011-11-02 | 2012-11-07 | 华北电网有限公司计量中心 | General test platform for low-voltage carrier automatic meter reading system |
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| CN103353545B (en) | 2015-06-10 |
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