A power supply system, an inverter, a busbar box and a data acquisition device

Abstract

This application discloses a power supply system, an inverter, a combiner box, and a data acquisition device. The power supply system includes a first device and a second device; the first device includes a first modulation circuit, and the second device includes a second modulation circuit; the first device is connected to the second device or a transformer via at least two power lines; when the first modulation circuit and the second modulation circuit communicate, the communication signal is transmitted through the protective layer of at least one power line as a transmission line. In this embodiment, the communication signal is transmitted through the protective layer of at least one power line as a transmission line. Since the protective layer itself is not used to transmit electrical energy, the attenuation of the communication signal is reduced during transmission.

Description

Technical Field

[0001] This application relates to the field of power control technology, and in particular to a power supply system, inverter, combiner box and data acquisition equipment. Background Technology

[0002] Power line carrier (PLC) communication is a special communication method that uses power lines as the information transmission medium between two electrical devices for data transmission.

[0003] In related technologies, power lines between two electrical devices are typically used as transmission lines for communication signals. However, during the transmission of communication signals, coupling devices are needed to couple the communication signals to the transmission line or to other lines. Since power lines are used to transmit electrical energy in addition to communication signals, the communication signals attenuate during transmission. Summary of the Invention

[0004] To address the aforementioned issues, this application provides a power supply system, inverter, combiner box, and data acquisition device that reduce the attenuation of communication signals during transmission.

[0005] The embodiments of this application disclose the following technical solutions:

[0006] In a first aspect, embodiments of this application provide a power supply system, including: a first device and a second device; the first device includes a first modulation circuit, and the second device includes a second modulation circuit;

[0007] The first device is connected to the second device or transformer via at least two power lines;

[0008] When the first modulation circuit and the second modulation circuit communicate, the communication signal is transmitted through the protective layer of at least one power line as the transmission line.

[0009] Optionally, the power supply system further includes a first coupling device and a second coupling device, wherein the first coupling device includes a first capacitor module or a first magnetic ring, and the second coupling device includes a second capacitor module or a second magnetic ring.

[0010] The first modulation circuit is coupled to the transmission line through the first coupling device to transmit communication signals;

[0011] The second modulation circuit is coupled to the transmission line through the second coupling device to transmit communication signals.

[0012] Optionally, the transmission line includes a first power line and a protective layer for the first power line.

[0013] Optionally, the transmission line includes a protective layer for a first power line and a protective layer for a second power line.

[0014] Optionally, the first coupling device includes a first capacitor module, and the second coupling device includes a second capacitor module; wherein the first capacitor module includes a first capacitor and a second capacitor, and the second capacitor module includes a third capacitor and a fourth capacitor;

[0015] The transmission line includes a first capacitor, a first power line, a third capacitor, a fourth capacitor, a protective layer for the first power line, and a second capacitor; wherein, the first port of the first modulation circuit is connected to the first port of the second modulation circuit through the first capacitor, the first power line, and the third capacitor, and the second port of the second modulation circuit is connected to the second port of the first modulation circuit through the fourth capacitor, the protective layer for the first power line, and the second capacitor.

[0016] Optionally, the first coupling device includes a first magnetic ring, and the second coupling device includes a second capacitor module; wherein the second capacitor module includes a third capacitor and a fourth capacitor;

[0017] The transmission line includes a first magnetic ring, a first electric field line, a third capacitor, a fourth capacitor, and a protective layer for the first electric field line; a first connecting line connects the first port and the second port of the first modulation circuit, the first end of the second connecting line connects to the first port of the second modulation circuit through the third capacitor, and the second end of the second connecting line connects to the second port of the second modulation circuit through the fourth capacitor; both the first connecting line and the second connecting line pass through the first magnetic ring; wherein, the second connecting line is composed of the first electric field line and the protective layer for the first electric field line.

[0018] Optionally, the first coupling device includes a first magnetic ring, and the second coupling device includes a second magnetic ring;

[0019] The transmission line includes a first magnetic ring, a first electric field line, a second magnetic ring, and a protective layer for the first electric field line; wherein, a first connecting line connects the first port and the second port of the first modulation circuit, a third connecting line connects the first port and the second port of the second modulation circuit, the first electric field line and the protective layer of the first electric field line form a first ring connecting line, the first connecting line and the first ring connecting line pass through the first magnetic ring, and the second connecting line and the first ring connecting line pass through the second magnetic ring.

[0020] Optionally, the first coupling device includes a first capacitor module, and the second coupling device includes a second capacitor module; wherein the first capacitor module includes a first capacitor and a second capacitor, and the second capacitor module includes a third capacitor and a fourth capacitor;

[0021] The transmission line includes a first capacitor, a protective layer for a first power line, a third capacitor, a fourth capacitor, a protective layer for a second power line, and a second capacitor; wherein, the first port of the first modulation circuit is connected to the first port of the second modulation circuit through the first capacitor, the protective layer for the first power line, and the third capacitor, and the second port of the second modulation circuit is connected to the second port of the first modulation circuit through the fourth capacitor, the protective layer for the second power line, and the second capacitor.

[0022] Optionally, the first coupling device includes a first magnetic ring and the second coupling device includes a second capacitor module; wherein the second capacitor module includes a third capacitor and a fourth capacitor;

[0023] The transmission line includes a first magnetic ring, a protective layer for a first electric field line, a third capacitor, a fourth capacitor, and a protective layer for a second electric field line; a first connecting line connects a first port and a second port of a first modulation circuit, a first end of a fourth connecting line connects to a first port of a second modulation circuit via a third capacitor, and a second end of a fourth connecting line connects to a second port of a second modulation circuit via a fourth capacitor, and both the first connecting line and the fourth connecting line pass through the first magnetic ring; wherein, the fourth connecting line is composed of the protective layers of the first electric field line and the protective layers of the second electric field line.

[0024] Optionally, the first coupling device includes a first magnetic ring, and the second coupling device includes a second magnetic ring;

[0025] The transmission line includes a first magnetic ring, a protective layer for a first electric field line, a second magnetic ring, and a protective layer for the first electric field line; wherein, a first connecting line connects a first port and a second port of a first modulation circuit, a third connecting line connects a first port and a second port of a second modulation circuit, the protective layer for the first electric field line and the protective layer for the second electric field line form a second ring connecting line, the first connecting line and the second ring connecting line pass through the first magnetic ring, and the third connecting line and the second ring connecting line pass through the second magnetic ring.

[0026] Optionally, a capacitor is connected between the first power line and its protective layer.

[0027] Secondly, embodiments of this application provide an inverter, including: a modulation circuit;

[0028] The inverter connects to electrical equipment via at least two power lines;

[0029] When the modulation circuit of the inverter communicates with the modulation circuit of the power equipment, the communication signal is transmitted through the protective layer of at least one power line as the transmission line.

[0030] Thirdly, embodiments of this application provide a combiner box, including: a modulation circuit;

[0031] The combiner box connects to electrical equipment via at least two power lines;

[0032] When the modulation circuit of the combiner box communicates with the modulation circuit of the power equipment, the communication signal is transmitted through the protective layer of at least one power line as the transmission line.

[0033] Fourthly, embodiments of this application provide a data acquisition device, including: a modulation circuit;

[0034] When the modulation circuit of the data acquisition unit communicates with the modulation circuit of the power equipment, the communication signal is transmitted through the protective layer of at least one power line as the transmission line; wherein, the power equipment is connected to the transformer through at least two power lines.

[0035] Because the circuit lines used to transmit modulation signals are also used to transmit electrical energy, the communication signal attenuates significantly during transmission. Therefore, in this embodiment, when the first modulation circuit and the second modulation circuit communicate, the communication signal is transmitted through a protective layer of at least one power line. Since the protective layer itself is not used to transmit electrical energy, the attenuation of the communication signal is reduced during transmission. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 A schematic diagram of a power supply system provided for an embodiment of this application;

[0038] Figure 2 Another power system schematic diagram provided for an embodiment of this application;

[0039] Figure 3 A schematic diagram of another power supply system provided in the embodiments of this application;

[0040] Figure 4 A schematic diagram of another power system provided in an embodiment of this application;

[0041] Figure 5 A schematic diagram of a power supply system provided for an embodiment of this application;

[0042] Figure 6 Another power system schematic diagram provided for an embodiment of this application;

[0043] Figure 7 A schematic diagram of another power supply system provided in the embodiments of this application;

[0044] Figure 8 A schematic diagram of another power system provided in an embodiment of this application;

[0045] Figure 9 A schematic diagram of a power supply system provided for an embodiment of this application;

[0046] Figure 10 Another power system schematic diagram provided for an embodiment of this application;

[0047] Figure 11 A schematic diagram of another power supply system provided in the embodiments of this application;

[0048] Figure 12 A schematic diagram of another power system provided in an embodiment of this application;

[0049] Figure 13 A schematic diagram of a power supply system provided for an embodiment of this application;

[0050] Figure 14 A schematic diagram of an inverter provided in an embodiment of this application;

[0051] Figure 15 A schematic diagram of a combiner box provided in an embodiment of this application;

[0052] Figure 16 This is a schematic diagram of a data acquisition device provided in an embodiment of this application. Detailed Implementation

[0053] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0054] The terms "first" and "second," etc., used in the specification and claims of this application are used to distinguish different objects, not to describe a specific order of objects. For example, "first electric line" and "second electric line," etc., are used to distinguish different electric lines, not to describe a specific order of electric lines.

[0055] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0056] In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more, for example, multiple processing units means two or more processing units, multiple elements means two or more elements, etc.

[0057] In PLC communication signal transmission technology, a coupling device is used to couple communication signals from a modulation circuit to a power line, or vice versa. In this embodiment, the coupling device may include a capacitor module or a magnetic ring.

[0058] Since power lines used for transmitting communication signals are also used for transmitting electrical energy, when two power lines are used as transmission lines for communication signals and the coupling devices include capacitor modules, the capacitor pool on the input side of the power equipment will cause communication signal attenuation. In addition, to meet safety regulations, the capacitor modules have high voltage withstand requirements. When two power lines are used as transmission lines and the coupling devices include magnetic rings, the inductance of the magnetic rings has high requirements. Furthermore, the greater the electrical energy transmitted on the power lines, the easier it is for the magnetic rings to reach magnetic saturation, reducing the inductance of the magnetic rings and thus leading to communication signal attenuation.

[0059] Based on the above analysis, both methods will lead to signal attenuation during the transmission of communication signals.

[0060] Therefore, in the power supply system provided in this application embodiment, when the first modulation circuit and the second modulation circuit communicate, the communication signal is transmitted through the protective layer of at least one power line as a transmission line. Since the protective layer itself is not used to transmit electrical energy, the attenuation of the communication signal is reduced during the transmission of the communication signal.

[0061] To enable those skilled in the art to understand and implement the technical solutions provided in the embodiments of this application, the architecture of the power system will be described below in conjunction with the accompanying drawings.

[0062] See Figure 1 This figure is a schematic diagram of a power supply system provided in an embodiment of this application.

[0063] like Figure 1 As shown, the power supply system includes a first device 100 and a second device 200. The first device 100 includes a first modulation circuit 110, and the second device includes a second modulation circuit 210.

[0064] In this embodiment, the types of the first device 100 and the second device 200 are not specifically limited. For example, the first device 100 may include an inverter, and the second device 200 may include a data acquisition unit or a combiner box. The data acquisition unit is used to collect parameters such as voltage, current, and power of the power equipment.

[0065] In this embodiment, the first modulation circuit 110 is used to modulate the original signal into a communication signal or demodulate the communication signal back into the original signal; the second modulation circuit 120 is used to modulate the original signal into a communication signal or demodulate the communication signal back into the original signal. It should be understood that modulating the original signal into a communication signal or demodulating the communication signal back into the original signal are mature technical means in the art, and will not be described in detail here.

[0066] The first device 100 is connected to the second device 200 or a transformer via at least two power lines (the first power line P1 and the second power line P2).

[0067] In this embodiment of the application, the type of electrical energy transmitted between the first device 100 and the second device 200 is not specifically limited. For example, when the first device 100 includes an inverter and the second device 200 includes a data acquisition unit, the first device 100 and the second device 200 can transmit single-phase AC power (corresponding to two power lines, namely the first power line P1 and the second power line P2) or three-phase AC power (corresponding to three power lines, namely the first power line P1, the second power line P2 and the third power line P3); when the first device 100 includes an inverter and the second device 200 includes a combiner box, the first device 100 and the second device 200 can transmit direct current (corresponding to two power lines, namely the first power line P1 and the second power line P2).

[0068] When the first modulation circuit 110 and the second modulation circuit 210 communicate, the communication signal is transmitted through the protective layer Px of at least one power line as a transmission line.

[0069] In this embodiment of the application, the type and material of the protective layer are not specifically limited. For example, the type of the protective layer may be the shielding layer or armor layer of the power line, and the material of the protective layer may be metal or other materials in the power line that support PLC signal transmission.

[0070] In this embodiment of the application, the first modulation circuit is coupled to the transmission line through a first coupling device and transmits communication signals; the second modulation circuit is coupled to the transmission line through a second coupling device and transmits communication signals.

[0071] For example, the first coupling device includes a first capacitor module or a first magnetic ring, and the second coupling device includes a second capacitor module or a second magnetic ring. Further, the first capacitor module includes a first capacitor and a second capacitor, and the second capacitor module includes a third capacitor and a fourth capacitor.

[0072] In this embodiment, the transmission line includes the following four scenarios: First, the transmission line includes any power line and a protective layer for any power line; second, the transmission line includes a protective layer for a first power line and a protective layer for a second power line. The following sections will describe these two scenarios respectively.

[0073] In the first scenario, the transmission line includes any power line and any power line's protective layer. For ease of understanding, subsequent embodiments will use a first power line and its protective layer as an example.

[0074] In one possible implementation, such as Figure 2 As shown, the first device 100 includes an inverter, the second device 200 includes a combiner box, the inverter is connected to the combiner box via at least two power lines, the first coupling device 300 includes a first capacitor module (first capacitor C1 and second capacitor C2), and the second coupling device 400 includes (third capacitor C3 and fourth capacitor C4); or, as Figure 3 As shown, the first device 100 includes an inverter, the second device 200 includes a data acquisition unit, the inverter is connected to a transformer through at least two power lines, the first coupling device 300 includes a first capacitor module (first capacitor C1 and second capacitor C2), and the second coupling device 400 includes (third capacitor C3 and fourth capacitor C4).

[0075] The transmission line consists of a first capacitor C1, a first power line P1, a third capacitor C3, a fourth capacitor C4, a protective layer P11 for the first power line, and a second capacitor C2. The first port of the first modulation circuit 110 is connected to the first port of the second modulation circuit 210 via the first capacitor C1, the first power line P1, and the third capacitor C3. The second port of the second modulation circuit 210 is connected to the second port of the first modulation circuit via the fourth capacitor C4, the protective layer P11 for the first power line, and the second capacitor C2.

[0076] During the transmission of communication signals, the first capacitor C1 couples the first communication signal from the first modulation circuit 110 to the first power line P1, the third capacitor C3 couples the first communication signal from the first power line P1 to the second modulation circuit 210, the fourth capacitor C4 couples the second communication signal from the second modulation circuit 210 to the protective layer P11 of the first power line, and the second capacitor C2 couples the second communication signal from the protective layer P11 of the first power line to the first modulation circuit 110, thereby realizing communication between the first device and the second device.

[0077] In this embodiment, the transmission line of the communication signal (the first power line P1 and the protective layer P11 of the first power line) is different from the transmission line of the direct current (the first power line P1 and the second power line P2). The transmission line of the communication signal is not affected by the capacitor banks in the first device 100 or the second device 200, thus reducing the attenuation of the communication signal. The protective layer P11 of the first power line does not transmit electrical energy, and the second capacitor C2 and the fourth capacitor C4 have no safety requirements. Therefore, by using the protective layer of the power line as the transmission line of the communication signal in this embodiment, the attenuation of the communication signal can be reduced, and the requirements for coupling devices (capacitors) can also be lowered.

[0078] In one possible implementation, such as Figure 4 As shown, the first device 100 includes an inverter, and the second device 200 includes a combiner box. The inverter is connected to the combiner box via at least two power lines. The first coupling device includes a first magnetic ring L1, and the second coupling device includes (a third capacitor C3 and a fourth capacitor C4); or, as shown... Figure 5 As shown, the first device 100 includes an inverter, the second device 200 includes a data acquisition unit, the inverter is connected to a transformer through at least two power lines, the first coupling device includes a first magnetic ring L1, and the second coupling device includes (a third capacitor C3 and a fourth capacitor C4).

[0079] The transmission line consists of a first magnetic ring L1, a first electric field line P1, a third capacitor C3, a fourth capacitor C4, and a protective layer P11 for the first electric field line. The first connecting line CL1 connects to the first and second ports of the first modulation circuit 110. The first end of the second connecting line CL2 is connected to the first port of the second modulation circuit 210 via the third capacitor C3, and the second end of the second connecting line CL2 is connected to the second port of the second modulation circuit 210 via the fourth capacitor C4. Both the first connecting line CL1 and the second connecting line CL2 pass through the first magnetic ring L1. The second connecting line CL2 is composed of the first electric field line L1 and the protective layer L11 for the first electric field line.

[0080] During the transmission of communication signals, the first magnetic ring L1 couples the first communication signal from the first modulation circuit 110 to the first power line P1, the third capacitor C3 couples the first communication signal from the first power line P1 to the second modulation circuit 210, the fourth capacitor C4 couples the second communication signal from the second modulation circuit 210 to the protective layer P11 of the first power line, and the first magnetic ring L1 couples the second communication signal from the protective layer P11 of the first power line to the first modulation circuit 110, thereby realizing communication between the first device and the second device.

[0081] It should be understood that the couplers used by the first device 100 and the second device 200 can be interchanged; that is, the first device 100 uses the first capacitor module, and the second device 200 uses the second magnetic ring. The transmission lines for the communication signals remain unchanged and will not be described further here.

[0082] In this embodiment, the transmission line of the communication signal (the first power line P1 and the protective layer P11 of the first power line) is different from the transmission line of the DC power (the first power line P1 and the second power line P2). The protective layer P11 of the first power line does not transmit electrical energy and has little impact on the inductance of the first magnetic ring, thereby reducing the attenuation of the communication signal and reducing the requirements for the coupling device (magnetic ring).

[0083] Furthermore, to isolate the electrical energy transmitted on the power line, this embodiment connects a capacitor between the first power line and its isolation layer. By connecting a capacitor between the first power line and its isolation layer, this embodiment can isolate the direct current on the power line, thereby improving the quality of the communication signal.

[0084] In one possible implementation, such as Figure 6 As shown, the first device 100 includes an inverter, and the second device 200 includes a combiner box. The inverter is connected to the combiner box via at least two power lines. The first coupling device includes a first magnetic ring L1, and the second coupling device includes a second magnetic ring L2; or, as shown... Figure 7 As shown, the first device 100 includes an inverter, the second device 200 includes a data acquisition unit, the inverter is connected to a transformer through at least two power lines, the first coupling device includes a first magnetic ring L1, and the second coupling device includes a second magnetic ring L2.

[0085] The transmission line consists of a first magnetic ring L1, a first electric field line P1, a protective layer P11 for the first electric field line, and a second magnetic ring L2. A first connecting line CL1 connects the first and second ports of the first modulation circuit 110, and a third connecting line CL3 connects the first and second ports of the second modulation circuit 210. The first electric field line P1 and the protective layer P11 form a first loop connecting line Circle1. The first connecting line CL1 and the first loop connecting line Circle1 pass through the first magnetic ring L1, and the third connecting line and the first loop connecting line Circle1 pass through the second magnetic ring L1.

[0086] During the transmission of communication signals, the first magnetic ring L1 couples the first communication signal from the first modulation circuit 110 to the first power line P1, the second magnetic ring L2 couples the first communication signal from the first power line P1 to the second modulation circuit 210, the second magnetic ring L2 couples the second communication signal from the second modulation circuit 210 to the protective layer P11 of the first power line, and the first magnetic ring L1 couples the second communication signal from the protective layer P11 of the first power line to the first modulation circuit 110, thereby realizing communication between the first device and the second device.

[0087] In this embodiment, the transmission line of the communication signal (the first power line P1 and the protective layer P11 of the first power line) is different from the transmission line of the DC power (the first power line P1 and the second power line P2). The protective layer P11 of the first power line does not transmit electrical energy and has little impact on the inductance of the first magnetic ring L1 and the second magnetic ring L2, thereby reducing the attenuation of the communication signal and reducing the requirements for the coupling device (magnetic ring).

[0088] Furthermore, to isolate the electrical energy transmitted on the power line, this embodiment connects a capacitor between the first power line and its isolation layer. By connecting a capacitor between the first power line and its isolation layer, this embodiment can isolate the direct current on the power line, thereby improving the quality of the communication signal.

[0089] It should be noted that, for ease of understanding, P1 is referred to as the first electric field line in the foregoing embodiments. However, the first electric field line can be any one of at least three electric field lines.

[0090] In this embodiment of the application, when the first modulation circuit and the second modulation circuit communicate, the communication signal is transmitted through the protective layer of at least one power line as a transmission line. Since the protective layer itself is not used to transmit electrical energy, the attenuation of the communication signal is reduced during the transmission of the communication signal, and the requirements for coupling devices (capacitors and / or magnetic rings) are reduced.

[0091] In the second scenario, the transmission line includes a protective layer for the first power line and a protective layer for the second power line.

[0092] In one possible implementation, such as Figure 8 As shown, the first device 100 includes an inverter, and the second device 200 includes a combiner box. The inverter is connected to the combiner box via at least two power lines. The first coupling device includes a first capacitor module (first capacitor C1 and second capacitor C2), and the second coupling device includes (third capacitor C3 and fourth capacitor C4); or, as shown... Figure 9 As shown, the first device 100 includes an inverter, the second device 200 includes a data acquisition unit, the inverter is connected to a transformer through at least two power lines, the first coupling device includes a first capacitor module (first capacitor C1 and second capacitor C2), and the second coupling device includes (third capacitor C3 and fourth capacitor C4).

[0093] The transmission line consists of a first capacitor C1, a protective layer P11 for the first power line, a third capacitor C3, a fourth capacitor C4, a protective layer P22 for the second power line, and a second capacitor C2. The first port of the first modulation circuit 110 is connected to the first port of the second modulation circuit 210 via the first capacitor C1, the protective layer P11 for the first power line, and the third capacitor C3. The second port of the second modulation circuit 210 is connected to the second port of the first modulation circuit via the fourth capacitor C4, the protective layer P22 for the second power line, and the second capacitor C2.

[0094] During the transmission of communication signals, the first capacitor C1 couples the first communication signal from the first modulation circuit 110 to the protective layer P11 of the first power line, the third capacitor C3 couples the first communication signal from the protective layer P11 of the first power line to the second modulation circuit 210, the fourth capacitor C4 couples the second communication signal from the second modulation circuit 210 to the protective layer P22 of the second power line, and the second capacitor C2 couples the second communication signal from the protective layer P22 of the second power line to the first modulation circuit 110, thereby realizing communication between the first device and the second device.

[0095] In this embodiment, the transmission line of the communication signal (the first power line P1 and the protective layer P11 of the first power line) is different from the transmission line of the DC power (the first power line P1 and the second power line P2). The transmission line of the communication signal is not affected by the capacitor banks in the first device 100 or the second device 200, thus reducing the attenuation of the communication signal. Neither the protective layer P11 nor the protective layer P22 of the first power line transmits electrical energy, and the first capacitor C1, the second capacitor C2, the third capacitor C3, and the fourth capacitor C4 have any safety requirements. Therefore, by using the protective layer of the power line as the transmission line of the communication signal in this embodiment, the attenuation of the communication signal can be reduced, and the requirements for coupling devices (capacitors) can also be lowered.

[0096] In one possible implementation, such as Figure 10 As shown, the first device 100 includes an inverter, and the second device 200 includes a combiner box. The inverter is connected to the combiner box via at least two power lines. The first coupling device includes a first magnetic ring L1, and the second coupling device includes (a third capacitor C3 and a fourth capacitor C4); or, as shown... Figure 11 As shown, the first device 100 includes an inverter, the second device 200 includes a data acquisition unit, the inverter is connected to a transformer through at least two power lines, the first coupling device includes a first magnetic ring L1, and the second coupling device includes (a third capacitor C3 and a fourth capacitor C4).

[0097] The transmission line consists of a first magnetic ring L1, a protective layer P11 for the first electric field line, a third capacitor C3, a fourth capacitor C4, and a protective layer P22 for the second electric field line. The first connecting line CL1 connects to the first and second ports of the first modulation circuit 110. The first end of the fourth connecting line CL4 is connected to the first port of the second modulation circuit 210 via the third capacitor C3, and the second end of the fourth connecting line CL4 is connected to the second port of the second modulation circuit 210 via the fourth capacitor C4. Both the first connecting line CL1 and the fourth connecting line CL4 pass through the first magnetic ring L1. The fourth connecting line CL4 is composed of the protective layers L11 and L22 of the first and second electric field lines.

[0098] During the transmission of communication signals, the first magnetic ring L1 couples the first communication signal from the first modulation circuit 110 to the protective layer P22 of the second electric line, the third capacitor C3 couples the first communication signal from the protective layer P22 of the second electric line to the second modulation circuit 210, the fourth capacitor C4 couples the second communication signal from the second modulation circuit 210 to the protective layer P11 of the first electric line, and the first magnetic ring L1 couples the second communication signal from the protective layer P11 of the first electric line to the first modulation circuit 110, thereby realizing communication between the first device and the second device.

[0099] It should be understood that the couplers used by the first device 100 and the second device 200 can be interchanged; that is, the first device 100 uses the first capacitor module, and the second device 200 uses the second magnetic ring. The transmission lines for the communication signals remain unchanged and will not be described further here.

[0100] In this embodiment, the transmission line of the communication signal (the first power line P1 and the protective layer P11 of the first power line) is different from the transmission line of the DC power (the first power line P1 and the second power line P2). The protective layer P11 of the first power line does not transmit electrical energy and has little impact on the inductance of the first magnetic ring L1 and the second magnetic ring L2, thereby reducing the attenuation of the communication signal and reducing the requirements for the coupling device (magnetic ring).

[0101] In one possible implementation, such as Figure 12 As shown, the first device 100 includes an inverter, and the second device 200 includes a combiner box. The inverter is connected to the combiner box via at least two power lines. The first coupling device includes a first magnetic ring L1, and the second coupling device includes a second magnetic ring L2; or, as shown... Figure 13 As shown, the first device 100 includes an inverter, the second device 200 includes a data acquisition unit, the inverter is connected to a transformer through at least two power lines, the first coupling device includes a first magnetic ring L1, and the second coupling device includes a second magnetic ring L2.

[0102] In both implementations described above, the transmission line consists of a first magnetic ring L1, a first electric field line P1, a protective layer P11 for the first electric field line, a second magnetic ring L2, and a protective layer for the second electric field line L22. Specifically, a first connecting line CL1 connects to the first and second ports of the first modulation circuit 110, a third connecting line CL3 connects to the first and second ports of the second modulation circuit 210, and the protective layers P11 and P22 of the first and second electric field lines form a second circular connecting line Circle2. The first connecting line CL1 and the second circular connecting line Circle2 pass through the first magnetic ring L1, and the third connecting line CL3 and the second circular connecting line Circle2 pass through the second magnetic ring L1.

[0103] During the transmission of communication signals, the first magnetic ring L1 couples the first communication signal from the first modulation circuit 110 to the protective layer P11 of the first electric line, the second magnetic ring L2 couples the first communication signal from the protective layer P11 of the first electric line to the second modulation circuit 210, the second magnetic ring L2 couples the second communication signal from the second modulation circuit 210 to the protective layer P22 of the second electric line, and the first magnetic ring L1 couples the second communication signal from the protective layer P22 of the second electric line to the first modulation circuit 110, thereby realizing communication between the first device and the second device.

[0104] In this embodiment, the transmission line of the communication signal (the first power line P1 and the protective layer P11 of the first power line) is different from the transmission line of the DC power (the first power line P1 and the second power line P2). The protective layer P11 of the first power line does not transmit electrical energy, and has little impact on the inductance of the first magnetic ring and the second magnetic ring, thereby reducing the attenuation of the communication signal and reducing the requirements for the coupling device (magnetic ring).

[0105] It should be noted that, for ease of understanding, P1 is designated as the first electric field line and P2 as the second electric field line in the aforementioned embodiments. However, the first and second electric field lines can be any two of at least one electric field line.

[0106] In this embodiment of the application, when the first modulation circuit and the second modulation circuit communicate, the communication signal is transmitted through the protective layer of at least one power line as a transmission line. Since the protective layer itself is not used to transmit electrical energy, the attenuation of the communication signal is reduced during the transmission of the communication signal, and the requirements for coupling devices (capacitors and / or magnetic rings) are reduced.

[0107] In addition to the power supply system provided in the above embodiments, this application also provides a power converter, which will be described in detail below with reference to the accompanying drawings.

[0108] See Figure 14 The figure is a schematic diagram of an inverter provided in an embodiment of this application.

[0109] like Figure 14 As shown, the inverter 300 includes a modulation circuit 310, and the inverter 300 is connected to electrical equipment via at least two power lines P1 and P2.

[0110] In this embodiment of the application, the connection relationship between the power equipment and the inverter 300 is not specifically limited. For example, the power equipment can be connected to the DC side of the inverter 300 or the AC side of the inverter 300.

[0111] When the modulation circuit 310 of the inverter 300 communicates with the modulation circuit of the power equipment, the communication signal is transmitted through the protective layer Px of at least one power line as a transmission line.

[0112] The transmission line includes any power line and any protective layer for the power line, or a protective layer for a first power line and a protective layer for a second power line. Further descriptions are consistent with those for the power supply system and will not be repeated here.

[0113] The inverter provided in this application embodiment transmits communication signals through the protective layer of at least one power line as a transmission line when the modulation circuit of the inverter communicates with the modulation circuit of the power equipment. Since the protective layer itself is not used to transmit electrical energy, the attenuation of the communication signal is reduced during the transmission of the communication signal.

[0114] In addition, this application embodiment also provides a combiner box, see schematic diagram of the combiner box. Figure 15 .

[0115] like Figure 15 As shown, the combiner box 400 includes a modulation circuit 410; the combiner box 400 is connected to electrical equipment via at least two power lines P1 and P2.

[0116] In this embodiment of the application, the connection relationship between the power equipment and the combiner box 400 is not specifically limited. For example, the power equipment can be connected to the input side of the combiner box 400 or to the output side of the combiner box 400.

[0117] When the modulation circuit of combiner box 400 communicates with the modulation circuit of power equipment, the communication signal is transmitted through the protective layer Px of at least one power line as a transmission line.

[0118] The transmission line includes any power line and any protective layer for the power line, or a protective layer for a first power line and a protective layer for a second power line. Further descriptions are consistent with those for the power supply system and will not be repeated here.

[0119] The combiner box provided in this application embodiment communicates with the modulation circuit of the power equipment by using the protective layer of at least one power line as a transmission line. Since the protective layer itself is not used to transmit electrical energy, the attenuation of the communication signal is reduced during the transmission of the communication signal.

[0120] In addition, this application embodiment also provides a data acquisition device, the schematic diagram of which can be found in [reference needed]. Figure 16 .

[0121] like Figure 16 As shown, the data acquisition device 500 includes a modulation circuit 510.

[0122] When the modulation circuit 510 of the data acquisition device 500 communicates with the modulation circuit of the power equipment, the communication signal is transmitted through the protective layer Px of at least one power line as the transmission line; wherein, the power equipment is connected to the transformer through at least two power lines P1 and P2.

[0123] The transmission line includes any power line and any protective layer for the power line, or a protective layer for a first power line and a protective layer for a second power line. Further descriptions are consistent with those for the power supply system and will not be repeated here.

[0124] The data acquisition device provided in this application embodiment communicates with the modulation circuit of the power equipment by using the protective layer of at least one power line as a transmission line. Since the protective layer itself is not used to transmit electrical energy, the attenuation of the communication signal is reduced during the transmission of the communication signal.

[0125] The above description is merely one specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A power supply system characterized by comprising: include: A first device and a second device; the first device includes a first modulation circuit, and the second device includes a second modulation circuit; The first device is connected to the second device or transformer via at least two power lines; When the first modulation circuit and the second modulation circuit communicate with each other, the communication signal is transmitted through the protective layer of at least one of the power lines as a transmission line.

2. The power supply system according to claim 1, characterized by The power supply system further includes a first coupling device and a second coupling device, wherein the first coupling device includes a first capacitor module or a first magnetic ring, and the second coupling device includes a second capacitor module or a second magnetic ring. The first modulation circuit is coupled to the transmission line through the first coupling device to transmit the communication signal; The second modulation circuit is coupled to the transmission line through the second coupling device to transmit the communication signal.

3. The power supply system according to claim 1 or 2, characterized by, The transmission line includes any one of the power lines and any one of the power lines' protective layer.

4. The power supply system according to claim 1 or 2, characterized by The transmission line includes a protective layer for a first power line and a protective layer for a second power line.

5. The power supply system of claim 3, wherein The first coupling device includes the first capacitor module, and the second coupling device includes the second capacitor module; wherein, the first capacitor module includes a first capacitor and a second capacitor, and the second capacitor module includes a third capacitor and a fourth capacitor; The transmission line includes a first capacitor, a power line, a third capacitor, a fourth capacitor, a protective layer for the power line, and a second capacitor; wherein, a first port of the first modulation circuit is connected to a first port of the second modulation circuit through the first capacitor, the power line, and the third capacitor, and a second port of the second modulation circuit is connected to a second port of the first modulation circuit through the fourth capacitor, the protective layer for the power line, and the second capacitor.

6. The power supply system of claim 3, wherein The first coupling device includes the first magnetic ring, and the second coupling device includes the second capacitor module; wherein the second capacitor module includes a third capacitor and a fourth capacitor; The transmission line includes a first magnetic ring, a power line, a third capacitor, a fourth capacitor, and a shielding wire for the power line; a first connecting wire connects a first port and a second port of the first modulation circuit, a first end of a second connecting wire connects to a first port of the second modulation circuit via the third capacitor, and a second end of the second connecting wire connects to a second port of the second modulation circuit via the fourth capacitor; both the first connecting wire and the second connecting wire pass through the first magnetic ring; wherein, the second connecting wire is composed of the power line and a protective layer for the power line.

7. The power supply system of claim 3, wherein The first coupling device includes the first magnetic ring, and the second coupling device includes the second magnetic ring; The transmission line includes a first magnetic ring, a power line, a second magnetic ring, and a protective layer for the power line; wherein, a first connecting line connects a first port and a second port of the first modulation circuit, a third connecting line connects a first port and a second port of the second modulation circuit, the power line and the protective layer of the power line form a first ring connecting line, the first connecting line and the first ring connecting line pass through the first magnetic ring, and the second connecting line and the first ring connecting line pass through the second magnetic ring.

8. The power supply system of claim 4, wherein The first coupling device includes the first capacitor module, and the second coupling device includes the second capacitor module; wherein, the first capacitor module includes a first capacitor and a second capacitor, and the second capacitor module includes a third capacitor and a fourth capacitor; The transmission line includes a first capacitor, a protective layer for the first power line, a third capacitor, a fourth capacitor, a protective layer for the second power line, and a second capacitor; wherein, the first port of the first modulation circuit is connected to the first port of the second modulation circuit through the first capacitor, the protective layer for the first power line, and the third capacitor, and the second port of the second modulation circuit is connected to the second port of the first modulation circuit through the fourth capacitor, the protective layer for the second power line, and the second capacitor.

9. The power supply system of claim 4, wherein, The first coupling device includes the first magnetic ring, and the second coupling device includes the second capacitor module; wherein the second capacitor module includes a third capacitor and a fourth capacitor; The transmission line includes a first magnetic ring, a protective layer for the first electric field line, a third capacitor, a fourth capacitor, and a protective layer for the second electric field line; a first connecting line connects a first port and a second port of the first modulation circuit, a first end of a fourth connecting line connects to the first port of the second modulation circuit through the third capacitor, and a second end of the fourth connecting line connects to the second port of the second modulation circuit through the fourth capacitor; both the first connecting line and the fourth connecting line pass through the first magnetic ring; wherein, the fourth connecting line is composed of the protective layers of the first electric field line and the second electric field line.

10. The power supply system of claim 4, wherein The first coupling device includes the first magnetic ring, and the second coupling device includes the second magnetic ring; The transmission line includes a first magnetic ring, a protective layer for the first electric field line, a second magnetic ring, and a protective layer for the first electric field line; wherein, a first connecting line connects a first port and a second port of the first modulation circuit, a third connecting line connects a first port and a second port of the second modulation circuit, the protective layer for the first electric field line and the protective layer for the second electric field line form a second ring connecting line, the first connecting line and the second ring connecting line pass through the first magnetic ring, and the third connecting line and the second ring connecting line pass through the second magnetic ring.

11. The power supply system according to claim 6 or 7, characterized by A capacitor is connected between the power line and the protective layer of the power line.

12. An inverter, characterized by comprising: include: Modulation circuit; The inverter is connected to the power equipment via at least two power lines; When the modulation circuit of the inverter communicates with the modulation circuit of the power equipment, the communication signal is transmitted through the protective layer of at least one power line as a transmission line.

13. A junction box characterized by, include: Modulation circuit; The combiner box is connected to the power equipment via at least two power lines; When the modulation circuit of the combiner box communicates with the modulation circuit of the power equipment, the communication signal is transmitted through the protective layer of at least one of the power lines as a transmission line.

14. A data acquisition device, characterized in that, include: Modulation circuit; When the modulation circuit of the data acquisition device communicates with the modulation circuit of the power equipment, the communication signal is transmitted through the protective layer of at least one power line as a transmission line; wherein, the power equipment is connected to the transformer through at least two power lines.

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