CN207460170U - A kind of device for inhibiting power carrier signal attenuation - Google Patents
A kind of device for inhibiting power carrier signal attenuation Download PDFInfo
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- CN207460170U CN207460170U CN201721425776.3U CN201721425776U CN207460170U CN 207460170 U CN207460170 U CN 207460170U CN 201721425776 U CN201721425776 U CN 201721425776U CN 207460170 U CN207460170 U CN 207460170U
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Abstract
A kind of device for inhibiting power carrier signal attenuation of the utility model, including toroidal core, first coil, the second coil, tertiary coil, magnetic flux monitoring modular, magnetic flux Contrary compensation module；First coil, the second coil, tertiary coil are wound on magnetic core, the input terminal of two taps connection magnetic flux monitoring modular of second coil, the input terminal of the output terminal connection magnetic flux Contrary compensation module of magnetic flux monitoring modular, two taps of the output terminal connection tertiary coil of magnetic flux Contrary compensation module, two taps of first coil are connected in power circuit；The electric power signal that frequency is 50Hz can generate a magnetic flux after flowing through first coil, and electric power signal will not generate pressure drop and loss at first coil both ends；It is not the power carrier signal of 50Hz to frequency, magnetic flux monitoring modular is not handled, and first coil can generate it induction reactance, and power carrier signal is hindered to pass through.The utility model can effectively inhibit power carrier signal attenuation.
Description
Technical field
The utility model is related to power carrier communication technical fields, and in particular to a kind of to inhibit what power carrier signal decayed
Device.
Background technology
Power carrier communication (Power line Communication abbreviation PLC) is to be transmitted using power line as information
The information of required transmission is carried out the technology of high-speed transfer by medium, with high reliability, survivability it is strong, without frame
If the characteristics of special circuit and grown rapidly, this communication modes are now widely used in power department automatic management
Carrier path is by communication etc. in electric energy meter low-voltage collecting meter reading system, home intelligence communication.Numerous production firms have been introduced respectively
The terminal devices such as the carrier communication electric energy meter of kind of model, carrier acquisition terminal organ, carrier wave concentrator, carrier wave router, Homeplug
For users to use, carrier electric energy meter low-voltage collecting meter reading system has obtained the application of large area in electric administrative department at present.
It is found in the actual application of power department, China generates power grid the electrical equipment for accessing power grid at present
Pollution there is no pressure standard, cause low voltage electric network seriously polluted, in addition washing machine common in customer charge, television set, day
The electrical equipments such as light lamp, hair dryer, refrigerator, air-conditioning, elevator can make the input impedance of power circuit, load change, from
And make power carrier signal that serious distortion and attenuation occur, cause communication failure, meter reading success rate is low.
Either manufacturer or site operation personnel once has found this problem, and following approach is generally taken to solve：
1st, the signal strength of carrier wave transmitter unit is increased；
2nd, repeater is increased between electric energy meter and collector；
3rd, solved by routing algorithm；
Meter reading when the 4th, selecting, under normal circumstances, in the time-division at midnight, customer charge has largely all been stopped, on power grid
Various interference signals substantially reduce, and meter reading success rate is higher.
For the first solution, because country will to the carrier signal strength finite value of carrier units input electric power circuit
It asks, it is impossible to which unlimited to improve, the influence of power grid user load in addition, effect is nor very well.
For second of solution, it is necessary to increase construction cost.
For the third solution, suitable for the densely distributed situation of user's electric energy meter, the electric energy meter of each user
It is configured to undertake the electric energy meter of relay function, delivers in relays between each other.If user's electric energy meter is more dispersed,
Effect is not had.
For the 4th kind of solution, some electric administrative departments regulation sets collection period, collector in collector
Carry out automatic data logging by collection period, if copying and accepting unsuccessful, just copied and accepted again in next collection period, one day 24 it is small when it is interior
As long as have it is any once copy and accept success, the same day just stops copying and accepting.Though this allows and can realize and freeze copying and accepting for electricity, use can not achieve
Power consumption parameter monitoring in real time in family is a kind of adaptation with copying and accepting.
Utility model content
We have found that the means that tradition solves carrier communication quality are mainly the intensity for the signal for increasing communication, increase signal
Relaying increases signal input intensity, improves receiving sensitivity etc..The thought of the utility model is：In existing signal strength feelings
Under condition, optimize signal transmission passage, it is made to be more suitable for the transmission of signal, reduce transmission loss, signal-to-noise ratio is improved, so as to improve
Carrier communication quality.
In view of this, in order to solve above-mentioned technical problem of the prior art, the utility model proposes a kind of inhibition electric power
The solution of carrier signal attenuation, makes meter reading success rate be greatly improved, and substantially may be implemented in any time supervises in real time
It surveys and copies and accepts.
The utility model is solved the above problems by following technological means：
It is a kind of inhibit power carrier signal attenuation device, including magnetic core, first coil, the second coil, tertiary coil,
Magnetic flux monitoring modular, magnetic flux Contrary compensation module；
First coil, the second coil, tertiary coil are wound on magnetic core, two taps connection magnetic flux monitoring of the second coil
The input terminal of module, the input terminal of the output terminal connection magnetic flux Contrary compensation module of magnetic flux monitoring modular, magnetic flux are reversed
Two taps of the output terminal connection tertiary coil of compensating module, two taps of first coil are connected in power circuit；
Frequency is that can generate a magnetic flux after the electric power signal of 50Hz flows through first coil, which can be in First Line
A reverse potential E1 is generated on circle, which can equally generate induced voltage signal, magnetic flux monitoring on the second coil
Module monitors the induced voltage signal in real time, which is done reverse phase, enhanced processing by magnetic flux Contrary compensation module,
Apply a voltage signal E2 equal in magnitude with reverse potential E1, direction is opposite to tertiary coil, so as to offset electric power signal
The reverse potential E1 generated in first coil, the vector sum for making E1 and E2 are zero, so that it is guaranteed that electric power signal will not be first
Coil both ends generate pressure drop and loss；
It is not the power carrier signal of 50Hz for frequency, first coil can generate it induction reactance XL=2 π fL, resistance
Power carrier signal is hindered to pass through.
Preferably, the magnetic core is toroidal core.
Further, the magnetic flux monitoring modular includes the second amplifier, and the inverting input of the second amplifier passes through
6th resistance connects the output terminal of the second amplifier, and the inverting input of the second amplifier connects the 4th capacitance by the 4th resistance
One end, the other end of the 4th capacitance passes through the normal phase input end that the 7th resistance connects the second amplifier, one end of the 4th capacitance
One end of the 3rd capacitance is connected by the 5th resistance, the other end of the 3rd capacitance connects the other end and the ground connection of the 4th capacitance, the
One end of three capacitances connects the second coil by a tap of second the second coil of inductance connection, the other end of the 3rd capacitance
Another tap.
Further, the magnetic flux Contrary compensation module includes the first amplifier, the normal phase input end of the first amplifier
The AGND ends of connector P1 are connected to by second resistance, the positive power source terminal of the first amplifier is connected to the+12V of connector P1
End, the negative power end of the first amplifier are connected to the -12V ends of connector P1, and the inverting input of the first amplifier passes through the 3rd
Resistance connects the output terminal of the second amplifier, and the inverting input of the first amplifier connects the first amplifier by first resistor
Output terminal, the inverting input of the first amplifier by the output terminal of first the first amplifier of capacitance connection, the first amplifier
For output terminal by one end of the 3rd the second capacitance of inductance connection, one end of the second capacitance passes through the first inductance connection tertiary coil
One tap, another tap of the other end connection tertiary coil of the second capacitance are simultaneously grounded.
Further, the number of turn of the first coil is 1.
A kind of method for inhibiting power carrier signal attenuation, increases the signal control between carrier terminal and user load
Unit processed.
A kind of method for inhibiting power carrier signal attenuation, increases magnetic bead between carrier terminal and user load.
A kind of method for inhibiting power carrier signal attenuation, increases reactor between carrier terminal and user load.
Compared with prior art, the beneficial effects of the utility model are as follows：
The utility model can effectively inhibit power carrier signal attenuation, and it is suitable to ensure that carrier signal carries out between carrier terminal
Profit is reliably transferred；
The utility model can also solve the problems, such as that carrier wave router suspension goes offline；
The real-time collection that the utility model cannot be only used for electric energy meter low-voltage collecting meter reading system is copied, every using power network as communication
The situation that carrier communicates is all suitable for；
The utility model is with obvious effects, of simple structure and low cost, it may also be used in high-voltage electric power circuit, is passed with substituting
The cost of system is high, area occupied is big, volume is heavy and the carrier wave trap of less effective.
Description of the drawings
It is required in being described below to embodiment in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model
Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the circuit diagram using power line carrier, PLC；
Fig. 2 is the circuit diagram that the utility model inhibits power carrier signal damping solution embodiment 1；
Fig. 3 is the structure diagram of the utility model signaling control unit；
Fig. 4 is the utility model magnetic flux monitoring modular and the circuit diagram of magnetic flux Contrary compensation module；
Fig. 5 is the circuit diagram that the utility model inhibits power carrier signal damping solution embodiment 2；
Fig. 6 is the circuit diagram that the utility model inhibits power carrier signal damping solution embodiment 3.
Specific embodiment
To enable the above-mentioned purpose of the utility model, feature and advantage more obvious understandable, below in conjunction with attached drawing and
The technical solution of the utility model is described in detail in specific embodiment.It is pointed out that described embodiment is only
Only it is the utility model part of the embodiment, instead of all the embodiments, based on the embodiment in the utility model, this field
Those of ordinary skill's all other embodiments obtained without making creative work, belong to the utility model
The scope of protection.
Embodiment 1
By in large quantities the study found that power line carrier, PLC is as follows the main reason for failure：What power carrier terminal was sent
After carrier signal is sent to by termination power in power circuit, in the shadow of the factors such as user load, interference signal, line impedance
Under sound, barrier signal level is significantly decayed, and in receiving terminal, barrier signal level is very small by even zero, so as to cause
Communication failure.And in these influence factors, what is played a decisive role is consumption of the user load to carrier signal.
As shown in Figure 1, by taking low-voltage circuit as an example, Ri represents user load, is added in power circuit there are two AC signal,
One is AC220V/50Hz electric power signals, the other is the electric power that carrier terminal 1 and carrier terminal 2 are sent in interactive communication
Carrier signal, depending on the type of carrier module, the frequency range of narrowband carrier signal generally exists the frequency of power carrier signal
1KHz~500KHz；The frequency range of broadband carrier signal is generally in 1MHz~30MHz；As seen from Figure 1, since user bears
The presence of load, AC220V/50Hz AC signals want consumed energy on user load, and equally, power carrier signal PLC equally will
Consumed energy, AC220V/50Hz have enough power designs to match with user load, work normally user load.And it carries
Ripple signal is communicated by means of power circuit, and there is stringent regulation in signal transmission power country, it is impossible to as
AC220V/50Hz signals match like that with user load, so, carrier signal is once sent in power circuit, runs into use
Family loads, and will generate energy consumption, and rapid to decay, the level after attenuation is difficult to be detected and effectively identified by terminal, so as to cause
Normal communication is unable between two terminals.
For such situation, the utility model proposes a solution, as shown in Figure 2.
Increase a signaling control unit between carrier terminal and user load as power carrier signal is inhibited to decay
Device, this signaling control unit is at any time monitored the AC signal on power circuit and starts interlock circuit, for
The AC signal of AC220V/50Hz, this signaling control unit are equivalent to a through swtich, and for other exchanges of non-50Hz
Signal, this signaling control unit are equivalent to the switch of a disconnection, then, except the AC signal of AC220V/50Hz, carrier wave letter
Number would not be influenced by user load, will not on user load consumed energy, would not also generate attenuation, carrier signal exists
Enough signal strength is kept on power circuit so as to ensure reliable communication between two terminals.
Signaling control unit monitors mould by toroidal core, first coil N1, the second coil N2, tertiary coil N3, magnetic flux
Block, magnetic flux Contrary compensation module composition, as shown in Figure 3.
The utility model provides a kind of signaling control unit for inhibiting power carrier signal attenuation, including toroidal core, the
One coil N1, the second coil N2, tertiary coil N3, magnetic flux monitoring modular and magnetic flux Contrary compensation module.
First coil N1, the second coil N2, tertiary coil N3 are wound on toroidal core, and two taps of the second coil N2 connect
Connect the input terminal of magnetic flux monitoring modular, the input of the output terminal connection magnetic flux Contrary compensation module of magnetic flux monitoring modular
End, two taps of the output terminal connection tertiary coil N3 of magnetic flux Contrary compensation module, two taps of first coil N1 connect
It is connected in power circuit.
For AC220V/50Hz signals, an inductance coil N1 is sealed in power circuit, under normal conditions this
The number of turn of coil is that flow through the voltage before this coil be U1 to 1, AC220V/50Hz AC signals, flows through the electricity after this coil
It presses as U2, according to magnetic induction principle, AC220V/50Hz AC signals can generate a magnetic flux after flowing through this coil, this
Magnetic flux can generate a reverse induction potential E1 on N1 and be superimposed upon in original signal, so that U2=U1-E1 ﹤ U1, then, it arrives
Voltage up to customer charge is lower than its rated voltage, can make user load cisco unity malfunction, this is either to electrical management
All it is unacceptable for department or user.
For this purpose, to be specially provided with induction coil a N2, AC220V/50Hz same in the magnetic flux that N1 is generated for the utility model
Sample can generate induced voltage signal on N2, and magnetic flux monitoring modular can monitor this voltage signal, magnetic flux Contrary compensation
This voltage signal can be done reverse phase, enhanced processing by module, apply one and E1 equal in magnitude, the opposite electricity in direction to coil N3
Signal E2 is pressed, so as to offset the reverse potential E1 that AC220V/50Hz is generated on N1, the vector sum for making E1 and E2 is zero, i.e. E1+
E2=0.Further, U2=U1 is made, then for inductance coil N1, the air core coil that a number of turn is 1 is equivalent to,
AC220V/50Hz AC signals uncrossed can pass through, and will not generate pressure drop and loss at N1 both ends.
For power carrier signal, reference carrier frequency is between 1kHz~30MHz, for this kind of signal, magnetic flux
Monitoring modular is disregarded, and coil N1 can generate it π fL of inductive reactance xl=2, and signal is hindered to pass through.Signal frequency is cured
Greatly, induction reactance is bigger.Since carrier signal can not would not also be reached user load, will not more be born in user by this coil
Attenuation is generated in load, is reliably transferred so as to ensure that carrier signal is smoothly transferred between carrier terminal.
As shown in figure 4, the magnetic flux monitoring modular includes the second amplifier U1B, the anti-phase input of the second amplifier U1B
End passes through the output terminal of the 6th resistance R6 the second amplifiers of connection U1B, and the inverting input of the second amplifier U1B passes through the 4th electricity
One end of the 4th capacitance C4 of R4 connections is hindered, the other end of the 4th capacitance C4 passes through the 7th resistance R7 the second amplifiers of connection U1B's
Normal phase input end, by one end of the 3rd capacitance C3 of the 5th resistance R5 connections, the 3rd capacitance C3's is another for one end of the 4th capacitance C4
One end connects the other end of the 4th capacitance C4 and ground connection, one end of the 3rd capacitance C3 pass through second inductance L2 the second coils of connection N2
A tap, the other end of the 3rd capacitance C3 connects another tap of the second coil N2.
The magnetic flux Contrary compensation module includes the first amplifier U1A, and the normal phase input end of the first amplifier U1A passes through
Second resistance R2 is connected to the AGND ends of connector P1, and the positive power source terminal of the first amplifier U1A is connected to the+12V of connector P1
End, the negative power end of the first amplifier U1A are connected to the -12V ends of connector P1, and the inverting input of the first amplifier U1A leads to
The output terminal of 3rd resistor R3 the second amplifiers of connection U1B is crossed, the inverting input of the first amplifier U1A passes through first resistor R1
The output terminal of the first amplifier U1A is connected, the inverting input of the first amplifier U1A is amplified by the first capacitance C1 connections first
The output terminal of device U1A, the output terminal of the first amplifier U1A pass through one end of the 3rd inductance L3 the second capacitances of connection C2, the second electricity
Hold one end of C2 by a tap of the first inductance L1 connection tertiary coils N3, the other end of the second capacitance C2 connects the 3rd line
It encloses another tap of N3 and is grounded.
By a large amount of field tests, it was demonstrated that the method can solve the situation that carrier communication success rate is low, unstable completely.
Signaling control unit can regard a product for purpose described in the utility model, be also used as one and match somebody with somebody
Part is mounted in the equipment such as electric energy meter, breaker, distribution network cabinet, realizes same purpose.
Since the utility model is with obvious effects, of simple structure and low cost, it may also be used in high-voltage electric power circuit, to take
For traditional cost is high, area occupied is big, volume is heavy and the carrier wave trap of less effective.
The frequency range of alternating current is 50Hz~60Hz, the 50Hz described in the utility model be actually 50Hz~
60Hz。
Embodiment 2
As shown in figure 5, increasing magnetic bead between carrier terminal and user load, magnetic bead can generate impedance to carrier signal,
Realize the purpose that carrier signal is avoided to generate attenuation on user load.
Embodiment 3
As shown in fig. 6, increasing reactor between carrier terminal and user load, reactor can generate resistance to carrier signal
It is anti-, realize the purpose that carrier signal is avoided to generate attenuation on user load.
Embodiment of above is the limited utilization of the device of the utility model.In fact, the utility model not only can use
It is copied in the real-time collection of electric energy meter low-voltage collecting meter reading system, every situation about communicating using power network as communications carrier can fit
With.Such as：Since the utility model is with obvious effects, of simple structure and low cost, it may also be used in high-voltage electric power circuit, to take
For traditional cost is high, area occupied is big, volume is heavy and the carrier wave trap of less effective.
Embodiment described above only expresses the several embodiments of the utility model, and description is more specific and detailed,
But it should not be interpreted as limiting the scope of the present invention.It should be pointed out that for the common of this field
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (6)
1. a kind of device for inhibiting power carrier signal attenuation, which is characterized in that including toroidal core, first coil, the second line
Circle, tertiary coil, magnetic flux monitoring modular, magnetic flux Contrary compensation module；
First coil, the second coil, tertiary coil are wound on magnetic core, two taps connection magnetic flux monitoring modular of the second coil
Input terminal, magnetic flux monitoring modular output terminal connection magnetic flux Contrary compensation module input terminal, magnetic flux Contrary compensation
Two taps of the output terminal connection tertiary coil of module, two taps of first coil are connected in power circuit；
Frequency is that can generate a magnetic flux after the electric power signal of 50Hz flows through first coil, which can be in first coil
A reverse potential E1 is generated, which can equally generate induced voltage signal, magnetic flux monitoring modular on the second coil
The induced voltage signal is monitored in real time, which is done reverse phase, enhanced processing by magnetic flux Contrary compensation module, to
Three-winding applies a voltage signal E2 equal in magnitude with reverse potential E1, direction is opposite, so as to offset electric power signal the
The reverse potential E1 generated on one coil, the vector sum for making E1 and E2 are zero, so that it is guaranteed that electric power signal will not be in first coil
Both ends generate pressure drop and loss；
It is not the power carrier signal of 50Hz for frequency, magnetic flux monitoring modular is disregarded, and first coil can generate it
One induction reactance XL=2 π fL hinder power carrier signal to pass through.
2. the device according to claim 1 for inhibiting power carrier signal attenuation, which is characterized in that the magnetic flux monitoring
Module includes the second amplifier, and the inverting input of the second amplifier connects the output terminal of the second amplifier by the 6th resistance,
The inverting input of second amplifier connects one end of the 4th capacitance by the 4th resistance, and the other end of the 4th capacitance passes through the 7th
Resistance connects the normal phase input end of the second amplifier, and one end of the 4th capacitance connects one end of the 3rd capacitance by the 5th resistance,
The other end of 3rd capacitance connects the other end of the 4th capacitance and ground connection, and one end of the 3rd capacitance passes through the second inductance L2 connections the
One tap of two coil, the other end of the 3rd capacitance connect another tap of the second coil.
3. the device according to claim 2 for inhibiting power carrier signal attenuation, which is characterized in that the magnetic flux is reversed
Compensating module includes the first amplifier, and the normal phase input end of the first amplifier is connected to the AGND of connector P1 by second resistance
End, the positive power source terminal of the first amplifier are connected to the+12V ends of connector P1, and the negative power end of the first amplifier is connected to connection
- 12V the ends of device P1, the inverting input of the first amplifier connect the output terminal of the second amplifier by 3rd resistor, and first puts
The inverting input of big device connects the output terminal of the first amplifier by first resistor, and the inverting input of the first amplifier passes through
The output terminal of first the first amplifier of capacitance connection, the output terminal of the first amplifier pass through the 3rd inductance L3 the second capacitances of connection
One end, one end of the second capacitance pass through a tap of the first inductance L1 connection tertiary coils, the other end connection of the second capacitance
Another tap of tertiary coil is simultaneously grounded.
4. the device according to claim 1 for inhibiting power carrier signal attenuation, which is characterized in that the first coil
The number of turn is 1.
5. a kind of device for inhibiting power carrier signal attenuation, which is characterized in that it is magnetic bead, is connected to and generates carrier signal
Between carrier terminal and user load.
6. a kind of device for inhibiting power carrier signal attenuation, which is characterized in that it is reactor, is connected to generation carrier signal
Carrier terminal and user load between.
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| CN201721425776.3U CN207460170U (en) | 2017-10-31 | 2017-10-31 | A kind of device for inhibiting power carrier signal attenuation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107623536A (en) * | 2017-10-31 | 2018-01-23 | 珠海市科荟电器有限公司 | A kind of device for suppressing power carrier signal decay |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107623536A (en) * | 2017-10-31 | 2018-01-23 | 珠海市科荟电器有限公司 | A kind of device for suppressing power carrier signal decay |
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