CN107733469B - Anti-interference circuit for power line broadband carrier communication - Google Patents
Anti-interference circuit for power line broadband carrier communication Download PDFInfo
- Publication number
- CN107733469B CN107733469B CN201711143326.XA CN201711143326A CN107733469B CN 107733469 B CN107733469 B CN 107733469B CN 201711143326 A CN201711143326 A CN 201711143326A CN 107733469 B CN107733469 B CN 107733469B
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- Prior art keywords
- transformer
- carrier communication
- power line
- transient suppressor
- interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/56—Circuits for coupling, blocking, or by-passing of signals
Abstract
The invention provides an anti-interference circuit for broadband carrier communication of a power line, wherein the capacitor C1 has the functions of passing high frequency and blocking low frequency, namely, the capacitor C1 can pass a carrier signal with high frequency and block an alternating current signal with low frequency and 50 Hz; the transient suppressor D1 can absorb sharp pulses to play a role in protection; a high frequency transformer T1, which functions to isolate and transmit the carrier signal; a transient suppressor D2, which acts to reduce the amplitude of the impulse disturbances; the resistor R1 has the function of maintaining less distortion of carrier communication waveforms, achieves better anti-interference effect through mutual matching of all the components, and meanwhile, has the advantages of fewer elements, high reliability, low cost and remarkable anti-interference effect.
Description
Technical Field
The invention belongs to the technical field of carrier communication anti-interference, and particularly relates to an anti-interference circuit for power line broadband carrier communication.
Background
The power line broadband carrier communication is a special communication mode for voice or data transmission by using a power distribution line (380/220V user line) as an information transmission medium, the technology is that a high-frequency signal carrying information is loaded on a current, then the high-frequency signal is separated from the current by using power lines of various grades for transmission, and then the high-frequency signal is transmitted to a power line broadband user terminal (a computer, a television or a telephone, a smart meter, a switch and a transformer), and the technology realizes the bearing of multiple services such as data, voice, video and the like on the existing electric line on the basis of no need of rewiring;
the biggest characteristic of power line broadband carrier communication is that rely on the power line network of electric power that has been laid to carry out signal transmission, need not erect the passageway in addition, and the cost is very low, consequently once release, power line broadband carrier communication has obtained rapid popularization, but power line broadband carrier communication also has a lot of shortcoming, for example during operation, is easily influenced by external signal and noise, especially the weak problem of interference killing feature can not be solved very much yet, for example in the pulse charging of electric motor car, can cause very big interference to carrier communication, probably even cause communication failure.
Disclosure of Invention
The invention aims to provide an anti-interference circuit for power line broadband carrier communication, which can limit the amplitude of pulse interference and reduce the distortion of broadband carrier waveforms when the circuit is subjected to pulse interference.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a power line broadband carrier communication anti-interference circuit, includes 220V alternating current power supply, electric capacity C1, transformer T1, transient suppressor D2 and resistance R1, electric capacity C1 and behind the input series connection of transformer T1 concatenate jointly at 220V alternating current power supply's both ends, the input of transformer T1 with transient suppressor D1 connects in parallel;
the resistor R1 is connected in series with the transient suppressor D2 and then is connected in series with one group of output ends of the transformer T1, and broadband filter circuits are connected in parallel with two ends of the resistor R1 and the transient suppressor D2.
Preferably, the transformer T1 is a high frequency transformer.
Preferably, the live wire end L of the 220V ac power supply is connected with one end of a capacitor C1, and the other end of the capacitor C1 is connected with the input end of the transformer T1 in series and then is connected with the neutral wire end N of the 220V ac power supply.
Compared with the prior art, the invention has the beneficial effects that: in the invention, the capacitor C1 has the functions of passing high frequency and blocking low frequency, namely, the capacitor C1 can pass a carrier signal with high frequency and block an alternating current signal with low frequency of 50 Hz; the transient suppressor D1 can absorb sharp pulses to play a role in protection; a high frequency transformer T1, which functions to isolate and transmit the carrier signal; a transient suppressor D2, which acts to reduce the amplitude of the impulse disturbances; the resistor R1 has the function of maintaining less distortion of carrier communication waveforms, achieves better anti-interference effect through mutual matching of all the components, and meanwhile, has the advantages of fewer elements, high reliability, low cost and remarkable anti-interference effect.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a circuit diagram of the present invention;
the marks in the figure: 1. a wideband filter circuit.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by those skilled in the art without making any inventive effort based on the embodiments of the present invention are within the scope of protection of the present invention.
As shown in the figure, the anti-interference circuit for broadband carrier communication of a power line comprises a 220V ac power supply, a capacitor C1, a transformer T1, a transient suppressor D2 and a resistor R1, wherein the capacitor C1 and the input end of the transformer T1 are connected in series and then are commonly connected in series with the two ends of the 220V ac power supply, and the input end of the transformer T1 is connected in parallel with the transient suppressor D1;
the resistor R1 is connected in series with the transient suppressor D2 and then is connected in series with one group of output ends of the transformer T1, and two ends of the resistor R1 and the transient suppressor D2 are connected in parallel with a broadband filter circuit 1.
The transformer T1 is a high-frequency transformer.
Further optimizing this scheme, the live wire end L of 220V alternating current power supply links to each other with the one end of electric capacity C1, the other end of electric capacity C1 links to each other with the zero line end N of 220V alternating current power supply after establishing ties with transformer T1's input.
Further optimizing the scheme, the broadband filter circuit in the invention is a conventional filter circuit, and can be selected as a capacitance-inductance filter circuit, wherein the circuit is the prior art and is not described in detail herein.
The anti-interference circuit provided by the invention is applied to a low-voltage power line carrier communication system of a national network electric energy meter, and effectively solves the problem of poor anti-pulse interference capability of the conventional broadband carrier receiving circuit.
It is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (2)
1. The utility model provides a power line broadband carrier communication anti-interference circuit, includes 220V alternating current power, electric capacity C1, transformer T1, transient suppressor D2 and resistance R1, its characterized in that: the live wire end L of the 220V alternating current power supply is connected with one input end of the transformer T1 in series with the capacitor C1, and the zero wire end N of the 220V alternating current power supply is connected with the other input end of the transformer T1; two input ends of the transformer T1 are respectively connected with two ends of the transient suppressor D1; one output end of one group of output ends of the transformer T1 is sequentially connected with a resistor R1 and the transient suppressor D2 in series, and then the other output ends of the transformer T1 and the same group are connected; and a broadband filter circuit is connected in parallel with two ends of a series circuit formed by the resistor R1 and the transient suppressor D2.
2. The power line broadband carrier communication anti-interference circuit according to claim 1, wherein: the transformer T1 is a high-frequency transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711143326.XA CN107733469B (en) | 2017-11-17 | 2017-11-17 | Anti-interference circuit for power line broadband carrier communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711143326.XA CN107733469B (en) | 2017-11-17 | 2017-11-17 | Anti-interference circuit for power line broadband carrier communication |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107733469A CN107733469A (en) | 2018-02-23 |
| CN107733469B true CN107733469B (en) | 2023-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711143326.XA Active CN107733469B (en) | 2017-11-17 | 2017-11-17 | Anti-interference circuit for power line broadband carrier communication |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111182777A (en) * | 2018-11-13 | 2020-05-19 | 上海元检自动化工程有限公司 | Programmable logic controller PLC device capable of resisting interference of strong magnetic field |
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| CN103368524A (en) * | 2013-06-17 | 2013-10-23 | 成都荣耀科技有限公司 | Signal conditioning circuit for remote monitoring system of distribution transformer |
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| CN107733469A (en) | 2018-02-23 |
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