Switch control device for coupling differential signals of photovoltaic concentrator

Abstract

The utility model belongs to the field of photovoltaic power generation, and particularly relates to a switch control device for coupling differential signals of a photovoltaic concentrator, which comprises a carrier chip, a relay module, a coupling magnetic ring and a microcontroller module. The signal output end of the microcontroller module is connected with the relay module, and the microcontroller module controls the on-off state of the relay module by generating a control signal so as to realize the on and off of a power line carrier differential signal. According to the utility model, the on and off of carrier differential signals are accurately controlled, the electrical loss is reduced, the electrical performance and efficiency of the photovoltaic concentrator are obviously improved, relay switch control is introduced, equipment can be rapidly switched to a safe state under an abnormal condition, the safety of personnel and the equipment is guaranteed, the relay with low power consumption and high reliability is adopted, and the reliability of the equipment is improved. The energy consumption and the failure rate are effectively reduced, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic power generation, in particular to a switch control device for coupling differential signals of a photovoltaic concentrator. Background Art

[0002] With the rapid development of photovoltaic power generation technology, the role of photovoltaic concentrators in photovoltaic power generation systems is becoming increasingly important. As key equipment in photovoltaic power generation systems, photovoltaic concentrators are primarily responsible for collecting and concentrating electrical energy from multiple photovoltaic modules and effectively managing and distributing it. They improve the electrical performance of photovoltaic modules and optimize power output, thereby increasing the efficiency and reliability of the entire photovoltaic power generation system. However, existing photovoltaic concentrators have certain limitations in terms of electrical performance, energy consumption, failure rate, and safety. Specific issues include:

[0003] 1. Inadequate electrical performance: Existing photovoltaic concentrators cannot accurately control the on and off of signals during carrier signal transmission, resulting in large electrical losses and affecting overall efficiency.

[0004] 2. High energy consumption and failure rate: Traditional photovoltaic concentrators use a single control method, which has high energy consumption and is prone to failure, affecting the long-term stable operation of the equipment;

[0005] 3. Low safety: Under abnormal conditions, such as overload or short circuit, existing photovoltaic concentrators cannot respond quickly, posing a safety hazard. Utility Model Content

[0006] The utility model provides a switch control device for coupling differential signals of a photovoltaic concentrator. By adding a relay to the carrier differential signal, the switch control of the carrier signal is realized, thereby improving the electrical performance of the photovoltaic concentrator, reducing energy consumption and failure rate, and improving safety, effectively solving the technical problems raised in the background technology.

[0007] The utility model provides the following technical solutions.

[0008] A switch control device for coupling differential signals of a photovoltaic concentrator comprises a carrier chip, a relay module, a coupling magnetic ring and a microcontroller module. The relay modules are respectively connected to the positive phase terminals of the power line carrier differential signal of the carrier chip. The signal output terminal of the microcontroller module is connected to the relay module. The microcontroller module controls the switching state of the relay module by generating a control signal to realize the conduction and disconnection of the power line carrier differential signal. The output terminal of the relay module is connected to the input terminal of the coupling magnetic ring.

[0009] Furthermore, the relay module includes K1, K2, K3 and K4, and the output ends of K1, K2, K3 and K4 are respectively connected to the input ends of the coupling magnetic ring.

[0010] Furthermore, the carrier chip generates four power line carrier differential signals, and the four carrier differential signals are controlled by K1, K2, K3 and K4 respectively.

[0011] Furthermore, the control signals include ctr1, ctrl2, ctrl3 and ctrl4, and ctr1, ctrl2, ctrl3 and ctrl4 are connected to the control terminals of K1, K2, K3 and K4 respectively.

[0012] Furthermore, the switch control device for coupling differential signals of the photovoltaic concentrator further comprises a power supply module (6) and a circuit protection module, wherein the power output portion of the power supply module is connected to the power input portion of the circuit protection module, and the power output portion of the circuit protection module is electrically connected to the power input portion of the microcontroller module to provide protective power for the entire device.

[0013] Furthermore, K1, K2, K3 and K4 are solid-state relays or electromagnetic relays.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows.

[0015] 1. This utility model reduces electrical losses and significantly improves the electrical performance and efficiency of photovoltaic concentrators by precisely controlling the on and off of carrier differential signals. It also introduces relay switch control to ensure that the equipment can quickly switch to a safe state under abnormal circumstances, thereby protecting the safety of personnel and equipment.

[0016] 2. This utility model adopts low-power, high-reliability relays to effectively reduce energy consumption and failure rate, extend the service life of the equipment, and realize independent control of multi-channel carrier differential signals by setting multiple relays to meet the needs of different working conditions. Through overcurrent and overvoltage protection, it effectively prevents equipment damage and improves system reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a block diagram of the principle of the switch control device for coupling differential signals of the photovoltaic concentrator;

[0018] Figure 2 This is a control circuit diagram of a switch control device for coupling differential signals of the photovoltaic concentrator;

[0019] Figure 3 This is a schematic diagram of the carrier chip in the present invention. DETAILED DESCRIPTION

[0020] Please refer to Figure 1-Figure 3The present invention provides a switch control device for coupling differential signals of a photovoltaic concentrator, including a carrier chip 1, a relay module 2, a coupling magnetic ring 3, a microcontroller module 4, a control signal 5, a power supply module 6 and a circuit protection module 7. The following describes an embodiment of the present invention in conjunction with the accompanying drawings of the present invention.

[0021] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms, "connection", and "installation" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In addition, "communication" can be a direct connection or an indirect connection through an intermediate medium. Here, "fixed" means that the two are connected to each other and the relative position relationship after connection remains unchanged. The directional terms mentioned in the embodiments of the present invention, such as "inside", "outside", "top", "bottom", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0022] In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0023] In the embodiments of the present invention, "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0024] Among them, the carrier chip 1 uses the high-performance carrier chip LME3281, which is responsible for generating the power line carrier differential signal. The signal is divided into positive phase PLC+ and negative phase PLC-. The relay module 2 is used to control the conduction and shutdown of the carrier differential signal. The coupling magnetic ring 3 is used to couple the carrier signal to the power line to realize signal transmission. The microcontroller module 4 is responsible for generating and transmitting the control signal 5 to the relay module to realize dynamic control.

[0025] Specifically, the relay modules 2 are respectively connected to the positive phase (PLC+) end of the power line carrier differential signal of the carrier chip 1, and the signal output end of the microcontroller module 4 is connected to the relay module 2. The microcontroller module 4 controls the switching state of the relay module 2 by generating a control signal 5 to realize the conduction and shutdown of the power line carrier differential signal. The output end of the relay module 2 is connected to the input end of the coupling magnetic ring 3, so that the microcontroller module 4 can dynamically adjust the control signal 5 according to the real-time operating status and preset conditions of the photovoltaic system to realize the switching state control of the relay module 2.

[0026] Specifically, the relay module 2 includes K1, K2, K3 and K4. It is worth noting that K1, K2, K3 and K4 are solid-state relays or electromagnetic relays, which have the advantages of low power consumption and high reliability.

[0027] The output ends of K1 , K2 , K3 and K4 are respectively connected to the input end of the coupling magnetic ring 3 .

[0028] Specifically, the carrier chip 1 generates four power line carrier differential signals, and the four carrier differential signals are controlled by K1, K2, K3 and K4 respectively.

[0029] Specifically, the control signal 5 includes ctr1, ctrl2, ctrl3 and ctrl4, and ctr1, ctrl2, ctrl3 and ctrl4 are connected to the control terminals of K1, K2, K3 and K4 respectively.

[0030] When ctr1, ctrl2, ctrl3, and ctrl4 are at a high level, the corresponding K1, K2, K3, and K4 are closed, and the carrier differential signal is turned on. When ctr1, ctrl2, ctrl3, and ctrl4 are at a low level, the corresponding K1, K2, K3, and K4 are disconnected, and the carrier differential signal is turned off. In an abnormal situation, the microcontroller module 4 or other logic control unit can respond quickly and switch all relay modules 2 to the disconnected state to ensure the safety of equipment and personnel.

[0031] Specifically, it also includes a power supply module 6 and a circuit protection module 7. The power supply module 6 adopts a DC power supply module or an external power supply module in a photovoltaic system. The circuit protection module 7 includes overcurrent protection and overvoltage protection circuits. The power output of the power supply module 6 is connected to the power input of the circuit protection module 7. The power output of the circuit protection module 7 is electrically connected to the power input of the microcontroller module 4 to provide protective power for the entire device. In addition, under abnormal circumstances, such as overload or short circuit, the protection module can quickly detect the abnormality and cut off the power supply to ensure the safety of equipment and personnel.

[0032] In summary, the beneficial effects of the present invention are:

[0033] By precisely controlling the on and off of the carrier differential signal, electrical losses are reduced and the electrical performance and efficiency of the photovoltaic concentrator are significantly improved. The introduction of relay switch control ensures that the equipment can quickly switch to a safe state under abnormal circumstances, ensuring the safety of personnel and equipment. The use of low-power, high-reliability relays effectively reduces energy consumption and failure rate, extending the service life of the equipment. By setting up multiple relays, independent control of multiple carrier differential signals is achieved to meet the needs of different working conditions. Through overcurrent and overvoltage protection, equipment damage is effectively prevented and system reliability is improved.

[0034] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited to them. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this utility model should be included in the scope of protection of the present utility model. The embodiments of the present utility model and the features of the embodiments can be combined with each other unless there is a conflict. Therefore, the scope of protection of the present utility model shall be based on the scope of protection of the claims.

Claims

1. A switch control device for coupling differential signals to a photovoltaic concentrator, characterized in that: It includes a carrier chip (1), a relay module (2), a coupling magnetic ring (3) and a microcontroller module (4); The relay modules (2) are respectively connected to the power line carrier differential signal positive phase terminals of the carrier chip (1); The signal output end of the microcontroller module (4) is connected to the relay module (2), and the microcontroller module (4) controls the switching state of the relay module (2) by generating a control signal (5) to realize the conduction and shutoff of the power line carrier differential signal; The output end of the relay module (2) is connected to the input end of the coupling magnetic ring (3).

2. A photovoltaic concentrator differential signal coupling switch control device according to claim 1, characterized in that: The relay module (2) comprises K1, K2, K3 and K4, and the output ends of K1, K2, K3 and K4 are respectively connected to the input ends of the coupling magnetic ring (3).

3. The switch control device for coupling differential signals of a photovoltaic concentrator according to claim 2, characterized in that: The carrier chip (1) generates four power line carrier differential signals, and the four carrier differential signals are controlled by K1, K2, K3 and K4 respectively.

4. The switch control device for coupling differential signals of a photovoltaic concentrator according to claim 2, characterized in that: The control signal (5) includes ctr1, ctrl2, ctrl3 and ctrl4, and ctr1, ctrl2, ctrl3 and ctrl4 are connected to the control terminals of K1, K2, K3 and K4 respectively.

5. The switch control device for coupling differential signals of a photovoltaic concentrator according to claim 1, characterized in that: Also includes a power supply module (6) and a circuit protection module (7); The power output portion of the power supply module (6) is connected to the power input portion of the circuit protection module (7), and the power output portion of the circuit protection module (7) is electrically connected to the power input portion of the microcontroller module (4) to provide protective power for the entire device.

6. The switch control device for coupling differential signals of a photovoltaic concentrator according to claim 2, characterized in that: K1, K2, K3 and K4 use solid-state relays or electromagnetic relays.

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