CN113037329A - Connecting circuit and connecting method of power line carrier decoupling network - Google Patents
Connecting circuit and connecting method of power line carrier decoupling network Download PDFInfo
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- CN113037329A CN113037329A CN202110104250.XA CN202110104250A CN113037329A CN 113037329 A CN113037329 A CN 113037329A CN 202110104250 A CN202110104250 A CN 202110104250A CN 113037329 A CN113037329 A CN 113037329A
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Abstract
The invention provides a connecting circuit of a power line carrier decoupling network and a connecting method thereof, wherein the connecting circuit comprises a first circuit, a second circuit, a third circuit, a fourth circuit and a fifth circuit; the first circuit comprises a capacitor X and a capacitor Y, wherein the capacitor X is connected between power lines, and the capacitor Y is connected between the power lines and the ground; the second circuit comprises a set of inductances for equivalently describing the long-distance power line; the third circuit comprises a first decoupling capacitor, a first decoupling transformer and a power carrier communication slave module, the fourth circuit comprises a second decoupling capacitor, a second decoupling transformer and a power carrier communication master module, and the fifth circuit comprises an equivalent transformer in a power line network. According to the technical scheme, the decoupling network connection corresponding to the low-impedance network design between the power line and the equipment is selected, so that the stability and the reliability of power line carrier communication in a long-distance strong-interference communication environment are guaranteed.
Description
Technical Field
The invention belongs to the technical field of power line carriers, and particularly relates to a connecting circuit and a connecting method of a power line carrier decoupling network.
Background
At present, a power line carrier communication mode is adopted, and a main communication mode is formed due to low design and operation cost because a network does not need to be erected again. However, in the existing power line carrier communication, because the topology structure of the power line network is complex, different signal coupling modes have different losses to the power carrier signal, and when the load on the power line is heavy, the line impedance can reach below 1 ohm, which causes the signal attenuation of the carrier signal in the transmission on the power line, and in addition, the device absorbs the signal, which affects the stability and reliability of the communication, especially in the long-distance transmission process, the interference signal is stronger, which makes the communication more unstable and unreliable.
Disclosure of Invention
Aiming at the technical problems, the invention discloses a connecting circuit of a power line carrier decoupling network and a connecting method thereof, which can effectively reduce the attenuation of carrier signals transmitted on a power line and the absorption of equipment on the signals, thereby ensuring the stability and reliability of power line carrier communication in a long-distance strong-interference communication environment.
In contrast, the technical scheme adopted by the invention is as follows:
a connecting circuit of a power line carrier decoupling network comprises a first circuit, a second circuit, a third circuit, a fourth circuit and a fifth circuit, wherein the first circuit comprises a capacitor X and a capacitor Y, the capacitor X is connected between power lines, and the capacitor Y is connected between the power lines and the ground; the capacitor X and the capacitor Y are high-frequency capacitors;
the second circuit comprises a group of inductances which are used for equivalently describing the long-distance power line, and each inductance is connected in series with the corresponding power line;
the third circuit comprises a first decoupling capacitor, a first decoupling transformer and a power carrier communication slave module, wherein the first decoupling capacitor is connected with one end of a primary winding of the first decoupling transformer, and two ends of a secondary winding of the first decoupling transformer are connected with the power carrier communication slave module;
the fourth circuit comprises a second decoupling capacitor, a second decoupling transformer and a power carrier communication main module, wherein the second decoupling capacitor is connected with one end of a primary winding of the second decoupling transformer, and two ends of a secondary winding of the second decoupling transformer are connected with the power carrier communication main module;
the fifth circuit comprises equivalent transformers in a power line network, and the equivalent transformers are connected with each power line;
the communication equipment is sequentially connected with the first circuit, the second circuit and the fifth circuit in series; the third circuit is positioned between the first circuit and the second circuit and is bridged between the power lines; the fourth circuit is positioned between the second circuit and the fifth circuit and is bridged between two power lines which are the same as the third circuit or between the power lines and the ground.
By adopting the technical scheme, the corresponding decoupling network connection is designed by utilizing the low impedance network between the power line and the equipment, so that the attenuation of the transmission of the carrier signal on the power line and the absorption of the equipment to the signal can be effectively reduced.
As a further improvement of the present invention, in the third circuit, two ends of the primary winding of the first decoupling transformer are connected in parallel with the first capacitor; in the fourth circuit, two ends of the primary winding of the second decoupling transformer are connected in parallel with the second capacitor.
As a further improvement of the present invention, in the third circuit, two ends of the first capacitor are connected in parallel with the first inductor; in the fourth circuit, two ends of the second capacitor are connected in parallel with the second inductor.
As a further improvement of the present invention, the other end of the primary winding of the first decoupling transformer is connected in series with a third capacitor, and the other end of the primary winding of the second decoupling transformer is connected in series with a fourth capacitor.
As a further improvement of the present invention, if the capacitance value of the capacitor Y in the first circuit is smaller than that of the capacitor X, the third circuit and the fourth circuit are bridged between any power line and the ground. I.e. in parallel relationship with any capacitance Y.
As a further improvement of the present invention, one end of the primary winding of the first decoupling transformer of the third circuit is connected to another power line through a fifth capacitor, respectively; and one end of a primary winding of a second decoupling transformer of the fourth circuit is connected with another power line through a sixth capacitor respectively.
As a further improvement of the present invention, if the capacitance value of the capacitor Y in the first circuit is greater than that of the capacitor X, the third circuit and the fourth circuit are connected across any two power lines, i.e. are in parallel relation with any capacitor X.
As a further improvement of the invention, the capacitor X and the capacitor Y are located in the communication device.
The invention also discloses a connection method of the power line carrier decoupling network, which adopts the connection circuit of the power line carrier decoupling network, and communication equipment is sequentially connected with the first circuit, the second circuit and the fifth circuit in series; the third circuit is positioned between the first circuit and the second circuit and is bridged between the power lines; the fourth circuit is positioned between the second circuit and the fifth circuit and is bridged between two power lines which are the same as the third circuit or between the power lines and the ground; and selecting a decoupling network connection corresponding to the low impedance network design between the power lines and the equipment according to the condition, wherein when the capacitance value of the capacitor Y is larger than that of the capacitor X, the third circuit and the fourth circuit are bridged between any two power lines, and when the capacitance value of the capacitor Y is smaller than that of the capacitor X, the third circuit and the fourth circuit are bridged between any one power line and the ground.
Compared with the prior art, the invention has the beneficial effects that:
by adopting the technical scheme of the invention, the decoupling network connection corresponding to the low-impedance network design between the power line and the equipment is selected, so that the attenuation of the transmission of the carrier signal on the power line and the absorption of the equipment to the signal can be effectively reduced. Therefore, the stability and the reliability of the power line carrier communication in a long-distance strong-interference communication environment are ensured.
Drawings
Fig. 1 is a schematic diagram of a connection circuit of a power line carrier decoupling network according to embodiment 1 of the present invention.
Fig. 2 is a schematic diagram of a connection circuit of a power line carrier decoupling network according to embodiment 2 of the present invention.
Fig. 3 is a schematic diagram of a connection circuit of a power line carrier decoupling network according to embodiment 3 of the present invention.
Fig. 4 is a schematic diagram of a connection circuit of a power line carrier decoupling network according to embodiment 4 of the present invention.
Fig. 5 is a schematic diagram of a third circuit and a fourth circuit in embodiment 5 of the present invention, in which a) is the third circuit and b) is the fourth circuit.
Fig. 6 is a schematic diagram of a third circuit and a fourth circuit in embodiment 6 of the present invention, in which a) is the third circuit and b) is the fourth circuit.
Fig. 7 is a schematic diagram of a third circuit and a fourth circuit in embodiment 7 of the present invention, in which a) is the third circuit and b) is the fourth circuit.
Fig. 8 is a schematic diagram of a connection circuit of a power line carrier decoupling network according to embodiment 8 of the present invention.
Fig. 9 is a schematic diagram of a connection circuit of a power line carrier decoupling network according to embodiment 9 of the present invention.
The reference numerals include:
1-a first circuit, 2-a second circuit, 3-a third circuit, 4-a fourth circuit, 5-a fifth circuit.
Detailed Description
Preferred embodiments of the present invention are described in further detail below.
Example 1
As shown in fig. 1, a connection circuit of a power line carrier decoupling network includes a first circuit 1, a second circuit 2, a third circuit 3, a fourth circuit 4, and a fifth circuit 5, where the first circuit 1 includes a capacitor X and a capacitor Y, the capacitor X is connected between power lines, and the capacitor Y is connected between the power lines and the ground; the capacitor X and the capacitor Y are high-frequency capacitors;
the second circuit 2 comprises a set of inductances equivalent to describe a long-distance power line, each inductance being connected in series with a respective power line;
the third circuit 3 comprises a first decoupling capacitor, a first decoupling transformer and a power carrier communication slave module, wherein the first decoupling capacitor is connected with one end of a primary winding of the first decoupling transformer, and two ends of a secondary winding of the first decoupling transformer are connected with the power carrier communication slave module;
the fourth circuit 4 comprises a second decoupling capacitor, a second decoupling transformer and a power carrier communication main module, wherein the second decoupling capacitor is connected with one end of a primary winding of the second decoupling transformer, and two ends of a secondary winding of the second decoupling transformer are connected with the power carrier communication main module;
the fifth circuit 5 comprises an equivalent transformer in a power line network, and the equivalent transformer is connected with each power line;
the communication equipment is sequentially connected with the first circuit 1, the second circuit 2 and the fifth circuit 5 in series; the third circuit 3 is positioned between the first circuit 1 and the second circuit 2 and is bridged between power lines; the fourth circuit 4 is located between the second circuit 2 and the fifth circuit 5 and is connected across two power lines in common with the third circuit 3.
Further, the third circuit 3 and the fourth circuit 4 select the crossed power line to satisfy the principle that the carrier frequency corresponds to the maximum impedance. If the capacitance value of the capacitor Y in the first circuit 1 is larger than that of the capacitor X, the third circuit 3 and the fourth circuit 4 are connected across any two power lines. I.e. in parallel relationship with any capacitance X. The capacitance X and the capacitance Y of the first circuit 1 are located in the communication device.
Example 2
As shown in fig. 2, a connection circuit of a power line carrier decoupling network includes a first circuit 1, a second circuit 2, a third circuit 3, a fourth circuit 4, and a fifth circuit 5, where the first circuit 1 includes a capacitor X and a capacitor Y, the capacitor X is connected between power lines, and the capacitor Y is connected between the power lines and the ground; the capacitor X and the capacitor Y are high-frequency capacitors; the second circuit 2 comprises a set of inductances equivalent to describe a long-distance power line, each inductance being connected in series with a respective power line; the third circuit 3 comprises a first decoupling capacitor, a first decoupling transformer and a power carrier communication slave module, wherein the first decoupling capacitor is connected with one end of a primary winding of the first decoupling transformer, and two ends of a secondary winding of the first decoupling transformer are connected with the power carrier communication slave module; the fourth circuit 4 comprises a second decoupling capacitor, a second decoupling transformer and a power carrier communication main module, wherein the second decoupling capacitor is connected with one end of a primary winding of the second decoupling transformer, and two ends of a secondary winding of the second decoupling transformer are connected with the power carrier communication main module; the fifth circuit 5 comprises an equivalent transformer in a power line network, and the equivalent transformer is connected with each power line; the communication equipment is sequentially connected with the first circuit 1, the second circuit 2 and the fifth circuit 5 in series; the third circuit 3 is positioned between the first circuit 1 and the second circuit 2 and is bridged between power lines; the capacitance value of the capacitor Y in the first circuit 1 is smaller than that of the capacitor X, and the fourth circuit 4 is positioned between the second circuit 2 and the fifth circuit 5 and bridged between the power line and the ground.
Further, the third circuit 3 and the fourth circuit 4 select the crossed power line to satisfy the principle that the carrier frequency corresponds to the maximum impedance. If the capacitance value of the capacitor Y in the first circuit 1 is smaller than that of the capacitor X, the third circuit 3 and the fourth circuit 4 are connected across any power line and the ground, i.e. are in parallel connection with any capacitor Y. The capacitance X and the capacitance Y of the first circuit 1 are located in the communication device.
Example 3
On the basis of embodiment 1, as shown in fig. 3, this embodiment is applied to a single-phase power line network, and includes a first circuit 1, a second circuit 2, a third circuit 3, a fourth circuit 4, and a fifth circuit 5, where the first circuit 1 includes a capacitor X and a capacitor Y, the capacitor X is connected between power lines, and the capacitor Y is connected between the power lines and ground; the capacitor X and the capacitor Y are high-frequency capacitors; the second circuit 2 comprises a set of inductances equivalent to describe a long-distance power line, each inductance being connected in series with a respective power line; the third circuit 3 comprises a first decoupling capacitor, a first decoupling transformer and a power carrier communication slave module, wherein the first decoupling capacitor is connected with one end of a primary winding of the first decoupling transformer, and two ends of a secondary winding of the first decoupling transformer are connected with the power carrier communication slave module; the fourth circuit 4 comprises a second decoupling capacitor, a second decoupling transformer and a power carrier communication main module, wherein the second decoupling capacitor is connected with one end of a primary winding of the second decoupling transformer, and two ends of a secondary winding of the second decoupling transformer are connected with the power carrier communication main module; the fifth circuit 5 comprises an equivalent transformer in a power line network, which equivalent transformer is connected to the power line. The communication equipment is sequentially connected with the first circuit 1, the second circuit 2 and the fifth circuit 5 in series; the third circuit 3 is positioned between the first circuit 1 and the second circuit 2 and is bridged between power lines; the fourth circuit 4 is located between the second circuit 2 and the fifth circuit 5 and is connected across the power lines.
Example 4
On the basis of embodiment 1, as shown in fig. 4, this embodiment is applied to a single-phase power line network, and includes a first circuit 1, a second circuit 2, a third circuit 3, a fourth circuit 4, and a fifth circuit 5, where the first circuit 1 includes a capacitor X and a capacitor Y, the capacitor X is connected between power lines, and the capacitor Y is connected between the power lines and ground; the capacitor X and the capacitor Y are high-frequency capacitors; the second circuit 2 comprises a set of inductances equivalent to describe a long-distance power line, each inductance being connected in series with a respective power line; the third circuit 3 comprises a first decoupling capacitor, a first decoupling transformer and a power carrier communication slave module, wherein the first decoupling capacitor is connected with one end of a primary winding of the first decoupling transformer, and two ends of a secondary winding of the first decoupling transformer are connected with the power carrier communication slave module; the fourth circuit 4 comprises a second decoupling capacitor, a second decoupling transformer and a power carrier communication main module, wherein the second decoupling capacitor is connected with one end of a primary winding of the second decoupling transformer, and two ends of a secondary winding of the second decoupling transformer are connected with the power carrier communication main module; the fifth circuit 5 comprises an equivalent transformer in a power line network, which equivalent transformer is connected to the power line. The communication equipment is sequentially connected with the first circuit 1, the second circuit 2 and the fifth circuit 5 in series; the third circuit 3 is positioned between the first circuit 1 and the second circuit 2 and is bridged between a power line and the ground; the fourth circuit 4 is located between the second circuit 2 and the fifth circuit 5 and is connected across the power line and ground.
Example 5
On the basis of embodiment 1, the third circuit 3 may also adopt a circuit as shown in fig. 5 a), or the fourth circuit 4 may adopt a circuit as shown in fig. 5 b), in the third circuit 3, two ends of the primary winding of the first decoupling transformer are connected in parallel with the first capacitor; in the fourth circuit 4, two ends of the primary winding of the second decoupling transformer are connected in parallel with the second capacitor.
Example 6
On the basis of embodiment 1, the third circuit 3 may also adopt a circuit as shown in fig. 6 a), or the fourth circuit 4 may adopt a circuit as shown in fig. 6 b), in the third circuit 3, two ends of the primary winding of the first decoupling transformer are connected in parallel with the first capacitor, and two ends of the first capacitor are connected in parallel with the first inductor; in the fourth circuit 4, two ends of the primary winding of the second decoupling transformer are connected in parallel with the second capacitor, and two ends of the second capacitor are connected in parallel with the second inductor.
Example 7
On the basis of embodiment 1, the third circuit 3 may also adopt a circuit as shown in fig. 7 a), or the fourth circuit 4 may adopt a circuit as shown in fig. 7 b), in the third circuit 3, two ends of the primary winding of the first decoupling transformer are connected in parallel with the first capacitor, and in the fourth circuit 4, two ends of the primary winding of the second decoupling transformer are connected in parallel with the second capacitor; the other end of the primary winding of the first decoupling transformer is connected with a third capacitor in series, and the other end of the primary winding of the second decoupling transformer is connected with a fourth capacitor in series.
Example 8
On the basis of embodiment 1, when the third circuit 3 and the fourth circuit 4 are bridged between the power lines and the ground, the connection mode may be as shown in fig. 8, where one end of the primary winding of the first decoupling transformer of the third circuit 3 is connected to the other two power lines through a fifth capacitor, respectively; one end of a primary winding of a second decoupling transformer of the fourth circuit 4 is connected with the other two power lines through a sixth capacitor respectively.
Example 9
On the basis of embodiment 1, for a single-phase power line network, when the third circuit 3 and the fourth circuit 4 are bridged between a power line and the ground, a connection mode as shown in fig. 9 may be adopted, where one end of the primary winding of the first decoupling transformer of the third circuit 3 is connected to another power line through a fifth capacitor; one end of the primary winding of the second decoupling transformer of the fourth circuit 4 is connected to another power line via a sixth capacitor.
The embodiment of the invention also discloses a connection method of the power line carrier decoupling network, which can adopt the connection circuit of the power line carrier decoupling network as described in the embodiments 1-9, and the communication equipment is sequentially connected with the first circuit, the second circuit and the fifth circuit in series; the third circuit is positioned between the first circuit and the second circuit and is bridged between the power lines; the fourth circuit is positioned between the second circuit and the fifth circuit and is bridged between two power lines which are the same as the third circuit or between the power lines and the ground; and (4) selecting a low-impedance network between the power line and the equipment according to the condition to design a corresponding decoupling network connection. When the capacitance value of the capacitor Y is smaller than that of the capacitor X, the third circuit 3 and the fourth circuit 4 are bridged between any power line and the ground.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (9)
1. A connecting circuit of a power line carrier decoupling network, characterized in that: the circuit comprises a first circuit, a second circuit, a third circuit, a fourth circuit and a fifth circuit;
the first circuit comprises a capacitor X and a capacitor Y, wherein the capacitor X is connected between power lines, and the capacitor Y is connected between the power lines and the ground; the capacitor X and the capacitor Y are high-frequency capacitors;
the second circuit comprises a group of inductances which are used for equivalently describing the long-distance power line, and each inductance is connected in series with the corresponding power line;
the third circuit comprises a first decoupling capacitor, a first decoupling transformer and a power carrier communication slave module, wherein the first decoupling capacitor is connected with one end of a primary winding of the first decoupling transformer, and two ends of a secondary winding of the first decoupling transformer are connected with the power carrier communication slave module;
the fourth circuit comprises a second decoupling capacitor, a second decoupling transformer and a power carrier communication main module, wherein the second decoupling capacitor is connected with one end of a primary winding of the second decoupling transformer, and two ends of a secondary winding of the second decoupling transformer are connected with the power carrier communication main module;
the fifth circuit comprises equivalent transformers in a power line network, and the equivalent transformers are connected with each power line;
the communication equipment is sequentially connected with the first circuit, the second circuit and the fifth circuit in series; the third circuit is positioned between the first circuit and the second circuit and is bridged between the power lines; the fourth circuit is positioned between the second circuit and the fifth circuit and is bridged between two power lines which are the same as the third circuit or between the power lines and the ground;
and (4) selecting a low-impedance network between the power line and the equipment according to the condition to design a corresponding decoupling network connection.
2. The connection circuit of the power line carrier decoupling network as claimed in claim 1, wherein: in the third circuit, two ends of the primary winding of the first decoupling transformer are connected in parallel with the first capacitor; in the fourth circuit, two ends of the primary winding of the second decoupling transformer are connected in parallel with the second capacitor.
3. The connection circuit of the power line carrier decoupling network as claimed in claim 2, wherein: in the third circuit, two ends of the first capacitor are connected with the first inductor in parallel; in the fourth circuit, two ends of the second capacitor are connected in parallel with the second inductor.
4. The connection circuit of the power line carrier decoupling network as claimed in claim 2, wherein: the other end of the primary winding of the first decoupling transformer is connected with a third capacitor in series, and the other end of the primary winding of the second decoupling transformer is connected with a fourth capacitor in series.
5. The connection circuit of the power line carrier decoupling network as claimed in any one of claims 1 to 4, wherein: if the capacitance value of the capacitor Y in the first circuit is smaller than that of the capacitor X, the third circuit and the fourth circuit are bridged between any power line and the ground.
6. The connection circuit of the power line carrier decoupling network as claimed in claim 5, wherein: one end of a primary winding of a first decoupling transformer of the third circuit is connected with another power line through a fifth capacitor respectively; and one end of a primary winding of a second decoupling transformer of the fourth circuit is connected with another power line through a sixth capacitor respectively.
7. The connection circuit of the power line carrier decoupling network as claimed in any one of claims 1 to 4, wherein: and if the capacitance value of the capacitor Y in the first circuit is larger than that of the capacitor X, the third circuit and the fourth circuit are bridged between any two power lines.
8. The connection circuit of the power line carrier decoupling network as claimed in claim 1, wherein: the capacitor X and the capacitor Y are located in the communication equipment.
9. A connection method of a power line carrier decoupling network is characterized in that: the connecting circuit of the power line carrier decoupling network is adopted, and the communication equipment is sequentially connected with the first circuit, the second circuit and the fifth circuit in series; the third circuit is positioned between the first circuit and the second circuit and is bridged between the power lines; the fourth circuit is positioned between the second circuit and the fifth circuit and is bridged between two power lines which are the same as the third circuit or between the power lines and the ground;
and selecting a decoupling network connection corresponding to the low impedance network design between the power lines and the equipment according to the condition, wherein when the capacitance value of the capacitor Y is larger than that of the capacitor X, the third circuit and the fourth circuit are bridged between any two power lines, and when the capacitance value of the capacitor Y is smaller than that of the capacitor X, the third circuit and the fourth circuit are bridged between any one power line and the ground.
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| CN202110104250.XA CN113037329B (en) | 2021-01-26 | 2021-01-26 | Connecting circuit and connecting method of power line carrier decoupling network |
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| CN214675142U (en) * | 2021-01-26 | 2021-11-09 | 深圳科士达科技股份有限公司 | Connecting circuit of power line carrier decoupling network |
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| GB523697A (en) * | 1939-01-12 | 1940-07-19 | Marconi Wireless Telegraph Co | Improvements in or relating to radio and like receivers |
| GB1147231A (en) * | 1965-03-26 | 1969-04-02 | Telefunken Patent | High-frequency push-pull amplifier circuit |
| WO1989003623A1 (en) * | 1987-10-15 | 1989-04-20 | The South East Queensland Electricity Board | Decoupling network and communication system |
| WO2015157527A1 (en) * | 2014-04-09 | 2015-10-15 | Linear Technology Corporation | BROADBAND POWER COUPLING/DECOUPLING NETWORK FOR PoDL |
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| GR01 | Patent grant |