Photovoltaic power station communication system and method

Abstract

The invention belongs to the technical field of communication, and discloses a photovoltaic power station communication system and method. The system provided by the invention comprises a ring network optical fiber and Mesh node devices, and the ring network optical fiber is deployed in a photovoltaic power station and is used for providing a communication link between the Mesh node devices; the Mesh node device comprises a fixed Mesh node device and a movable Mesh node device; the fixed Mesh node device is deployed at a fixed position in the photovoltaic power station and is used for establishing a stable wireless communication network; the mobile Mesh node device is used for carrying out mobile auxiliary communication in the photovoltaic power station. According to the method provided by the invention, data transmission is carried out by utilizing a hybrid network structure consisting of a ring network optical fiber and a Mesh node device; wireless connection and wired connection work cooperatively, and transmission paths are switched when a certain Mesh node or a certain optical fiber link breaks down. According to the invention, the requirements of large-range coverage, stable and reliable communication and flexible and extensible deployment of the photovoltaic power station can be met.

Description

Technical Field

[0001] The present invention belongs to the field of communication technologies, and more specifically, relates to a communication system and method for a photovoltaic power station. Background Art

[0002] Currently, photovoltaic power stations are increasing day by day. Generally, photovoltaic power stations are located in remote and open areas in the suburbs. The main difficulties in the daily monitoring or management of photovoltaic power stations lie in the large difficulty of network coverage and deployment. There are many problems in directly applying current communication technologies to photovoltaic power stations. For example, some current wireless communication technologies (such as 4G / 5G, LoRa, etc.) are often limited by the transmission distance and the number of nodes, and it is difficult to meet the requirements of photovoltaic power stations for large-scale coverage. For example, power line carrier communication uses power lines to transmit data, and the communication quality may be affected by power grid interference. The deployment cost of traditional wired networks is high and the difficulty is great. In addition, the existing communication solutions for photovoltaic power stations often also have problems such as fixed deployment and complex wiring. How to construct a communication system to meet the requirements of large-scale coverage, stable and reliable communication, and flexible and scalable deployment of photovoltaic power stations is an issue of concern and need to be solved in this field. Summary of the Invention

[0003] The present invention solves the problem that existing communication solutions are difficult to meet the requirements of large-scale coverage, stable and reliable communication, and flexible and scalable deployment of photovoltaic power stations by providing a communication system and method for a photovoltaic power station.

[0004] The present invention provides a communication system for a photovoltaic power station, including: a ring network optical fiber and a Mesh node device; the ring network optical fiber is deployed in the photovoltaic power station for providing a communication link between the Mesh node devices; the Mesh node device includes a fixed Mesh node device and a mobile Mesh node device; the fixed Mesh node device is deployed at a fixed position in the photovoltaic power station for establishing a stable wireless communication network; the mobile Mesh node device is used for mobile auxiliary communication within the photovoltaic power station.

[0005] Preferably, the mobile Mesh node device includes a vehicle-mounted Mesh node device and a portable Mesh node device; the vehicle-mounted Mesh node device is deployed on a vehicle moving within the photovoltaic power station, and the portable Mesh node device is portably deployed in any area within the photovoltaic power station that requires communication coverage.

[0006] Preferably, the Mesh node device includes a wired communication module, a wireless Mesh module, a radio frequency module, an antenna module, and a control module; the wired communication module and the wireless Mesh module are both connected to the control module, and the antenna module, the radio frequency module, and the wireless Mesh module are connected in sequence; the wired communication module is used to connect to the ring network optical fiber, and the wireless Mesh module is used to establish a wireless communication link; the control module is used to control the coordinated operation of wireless connection and wired connection, and switch the transmission path when a certain Mesh node or a certain optical fiber link fails.

[0007] Preferably, the radio frequency module includes a radio frequency transceiver chip, a power amplifier, a low noise amplifier, and a filter.

[0008] Preferably, the antenna module uses an omnidirectional antenna.

[0009] Preferably, the Mesh node device further includes a power supply module; the power supply module is used to supply power to the Mesh node device.

[0010] Preferably, the transmission power of the fixed Mesh node device is higher than that of the mobile Mesh node device.

[0011] Preferably, the vehicle-mounted Mesh node device adopts one or more anti-interference technologies such as spread spectrum, frequency hopping, and orthogonal frequency division multiplexing.

[0012] Preferably, the portable Mesh node device further includes an encryption module; the encryption module uses one or more encryption methods such as block encryption, channel encryption, and source encryption to encrypt data.

[0013] On the other hand, the present invention provides a communication method for a photovoltaic power station, and the communication method for the photovoltaic power station is applied to the above-mentioned photovoltaic power station communication system. The communication method for the photovoltaic power station includes: using a hybrid network structure composed of a ring network optical fiber and a Mesh node device for data transmission; the wireless connection and the wired connection cooperate, and the transmission path is switched when a certain Mesh node or a certain optical fiber link fails.

[0014] One or more technical solutions provided in the present invention have at least the following technical effects or advantages:

[0015] The photovoltaic power station communication system provided by the present invention includes a ring network optical fiber and Mesh node devices. The ring network optical fiber is deployed in the photovoltaic power station to provide a communication link between the Mesh node devices; the Mesh node devices include fixed Mesh node devices and mobile Mesh node devices; the fixed Mesh node devices are deployed at fixed positions in the photovoltaic power station to establish a stable wireless communication network; the mobile Mesh node devices are used for mobile auxiliary communication in the photovoltaic power station. The present invention uses a hybrid network structure composed of a ring network optical fiber and Mesh node devices for data transmission. Wireless connection and wired connection cooperate with each other to switch the transmission path when a certain Mesh node or a certain optical fiber link fails. Specifically, the present invention uses a ring network optical fiber and Mesh node devices to form a hybrid network structure. As the number of nodes increases, the network coverage range can be continuously expanded, which can meet the requirements of large-scale photovoltaic power stations, that is, the communication system provided by the present invention has a large coverage range. The present invention combines a ring network optical fiber with a Mesh wireless network, which can ensure the high availability and redundancy of the network. Even if some nodes or links fail, communication can be quickly restored, and the Mesh nodes adopt advanced wireless communication technologies, which can effectively resist electromagnetic interference and ensure stable communication, that is, the communication system provided by the present invention has high reliability. The present invention uses a ring network optical fiber and Mesh node devices to form a hybrid network structure, which combines the stability of wired communication and the flexibility of wireless communication. The combined use of fixed and mobile Mesh nodes enables the communication system to be flexibly deployed according to the actual layout and requirements of the photovoltaic power station without complex wiring projects; the node devices are interconnected. Adding new nodes or adjusting the network structure only requires simple configuration to quickly integrate into the existing network and meet future expansion requirements, that is, the communication system provided by the present invention has good flexible scalability. In summary, the communication solution provided by the present invention can meet the requirements of large-scale coverage, stable and reliable communication, and flexible and scalable deployment of the photovoltaic power station. Description of the Drawings

[0016] Figure 1 It is a schematic flowchart of a photovoltaic power station communication method provided by Embodiment 2 of the present invention. Detailed Embodiments

[0017] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the accompanying drawings of the specification and specific embodiments.

[0018] Embodiment 1:

[0019] Embodiment 1 provides a communication system for a photovoltaic power station, including: a ring network optical fiber and Mesh node devices; the ring network optical fiber is deployed in the photovoltaic power station for providing a communication link between the Mesh node devices; the Mesh node devices include fixed Mesh node devices and mobile Mesh node devices; the fixed Mesh node devices are deployed at fixed positions in the photovoltaic power station for establishing a stable wireless communication network; the mobile Mesh node devices are used for mobile auxiliary communication within the photovoltaic power station.

[0020] The mobile Mesh node devices include vehicle-mounted Mesh node devices and portable Mesh node devices; the vehicle-mounted Mesh node devices are deployed on vehicles moving within the photovoltaic power station, and the portable Mesh node devices are portably deployed in any area within the photovoltaic power station that requires communication coverage.

[0021] Specifically, the Mesh node devices mainly include a wired communication module, a wireless Mesh module, a radio frequency module, an antenna module, and a control module; the wired communication module and the wireless Mesh module are both connected to the control module, and the antenna module, the radio frequency module, and the wireless Mesh module are connected in sequence; the wired communication module is used to connect to the ring network optical fiber, and the wireless Mesh module is used to establish a wireless communication link; the control module is used to control the coordinated operation of wireless connection and wired connection, and switch the transmission path when a certain Mesh node or a certain optical fiber link fails.

[0022] The Mesh node devices may further include a power supply module, and the power supply module is used to supply power to the Mesh node devices.

[0023] The radio frequency module includes a radio frequency transceiver chip, a power amplifier, a low-noise amplifier, and a filter. The antenna module may adopt an omnidirectional antenna.

[0024] Among them, the transmission power of the fixed Mesh node devices is higher than that of the mobile Mesh node devices.

[0025] In addition, the vehicle-mounted Mesh node devices may adopt one or more anti-interference technologies such as spread spectrum, frequency hopping, and orthogonal frequency division multiplexing. The portable Mesh node devices may further include an encryption module; the encryption module uses one or more encryption methods such as block encryption, channel encryption, and source encryption to encrypt data.

[0026] The ring network optical fiber and each Mesh node will be further described below.

[0027] Fixed Mesh Nodes: These nodes are deployed at fixed positions within the PV power station to establish a stable wireless communication network. They have high transmission power and receiving sensitivity to ensure reliable communication services within a large coverage area. By selecting antennas with appropriate beam widths and gains and linearizing the power amplifier, the transmission power of the fixed Mesh nodes can be stabilized at up to 36 dBm. By using low-noise amplifiers and filters, external noise interference can be reduced. By intelligently optimizing the matching network of the antenna, signal reflection and loss can be reduced. Error correction coding and interleaving techniques are used to improve the anti-interference ability and transmission reliability of the signal, thereby enhancing its receiving sensitivity.

[0028] Vehicle-mounted Mesh Nodes: These nodes are installed on vehicles for mobile communication within the PV power station. They can provide real-time data transmission and communication support during tasks such as inspection and maintenance within the power station. They can achieve fast movement and deployment, with high flexibility. This flexibility enables the vehicle-mounted Mesh network to be quickly established in various complex and dynamic environments to meet emergency communication and temporary network requirements. The vehicle-mounted Mesh nodes are equipped with high-performance RF modules and antenna designs, support long-distance communication, can achieve high-rate data transmission, meet the application requirements with high bandwidth requirements such as real-time video transmission and large-capacity data file transmission, and adopt various anti-interference techniques such as spread spectrum, frequency hopping, and orthogonal frequency division multiplexing, and can maintain stable and reliable communication in complex electromagnetic environments. The vehicle-mounted Mesh nodes adopt industrial-grade design and manufacturing processes and can work stably for a long time under harsh environmental conditions.

[0029] Portable Mesh Nodes: These nodes are designed to be lightweight and easy to carry, and can be flexibly deployed in any area within the PV power station that requires communication coverage. They are suitable for temporarily increasing communication capacity or dealing with emergencies. The strong mobility and wide range of applicable scenarios of the portable Mesh nodes allow for the on-site temporary portable base station to be set up according to local conditions based on the occurrence of emergencies, meeting the communication needs of the emergency site. They can have multiple encryption methods, such as block encryption, channel encryption, and source encryption, etc., for private network use only, which can effectively prevent illegal device intrusion and the interception and cracking of the transmitted information, ensuring the high security of the network and information.

[0030] Ring network optical fiber: As the wired connection part, the ring network optical fiber provides a high-speed and stable communication link between Mesh nodes. This redundant design enhances the reliability of the network. Even if some fiber optic links fail, it can ensure the continuous operation of the communication network. Signal transmission is carried out using the principle of total internal reflection of light, which has an extremely high transmission bandwidth. Under the same conditions, the ring network optical fiber can transmit more data. The ring structure design enables data to be transmitted on multiple paths. When a node or path fails, the data can quickly switch to other normal paths for continuous transmission. Its self-healing ability greatly improves the reliability of the network, ensuring the continuity and stability of communication services. Compared with traditional network topologies, the ring network requires a relatively short cable length, so the cost is lower. This simple network structure is easier to manage and maintain.

[0031] Overall, the present invention constructs a high-performance communication network through the wireless connection between Mesh nodes and the wired connection of the ring network optical fiber. This hybrid network structure combines the advantages of wireless and wired communications, enabling high-speed data transmission and stable communication.

[0032] Photovoltaic power stations are usually located in remote and open areas. The communication system provided by the present invention realizes the flexible deployment of the network through the wireless connection of Mesh nodes, without complex wiring projects, greatly reducing the deployment difficulty and cost. At the same time, the self-organizing characteristics of the Mesh network enable nodes to automatically find the best communication path, ensuring the wide coverage and stability of the network.

[0033] In applications, based on the multi-path forwarding mechanism, self-organizing characteristics, and anti-interference ability of the Mesh network, the use of Mesh networking technology can achieve efficient, stable, and reliable data transmission, providing strong support for the operation and management of photovoltaic power stations, and transmitting information such as text, voice, and video generated in each link to the management control center in real time to achieve full-process, panoramic, and full-dimensional visualization.

[0034] In the operation and management of photovoltaic power stations, real-time and stable data transmission is crucial. The communication system provided by the present invention combines the high-speed wireless connection between Mesh nodes and the wired connection of the ring network optical fiber, enabling high-speed and stable data transmission. This hybrid network structure not only improves the data transmission efficiency but also enhances the redundancy and reliability of the network. Even if some nodes or links fail, communication can be quickly restored, ensuring the continuity and integrity of the data.

[0035] Photovoltaic power stations vary in scale and environmental conditions, posing high requirements for the adaptability and scalability of communication systems. The communication system provided by the present invention can be quickly adjusted and expanded according to different scenarios and requirements through flexible Mesh node deployment. This adaptability enables the system to easily cope with changes in the scale of photovoltaic power stations and environmental challenges, ensuring communication stability and efficiency. During application, the Mesh network can be planned and designed based on the geographical layout, communication requirements, and cost budget of the photovoltaic power station to determine the number and locations of fixed and mobile Mesh nodes, as well as the laying path of the ring network optical fiber.

[0036] The present invention has established a complete communication network. The Mesh node device includes a fixed Mesh node device and a mobile Mesh node device. The flexibility of the mobile Mesh node enables the network to be quickly adjusted according to actual needs and can also meet the requirements of mobile office and mobile maintenance.

[0037] In addition, compared with the communication solution using a traditional wired network, the communication system provided by the present invention can significantly reduce the wiring cost and construction period, lower the installation cost. At the same time, the self-organizing and self-healing characteristics of the Mesh network can also reduce the complexity and cost of daily maintenance, making the system more cost-effective.

[0038] Embodiment 2:

[0039] Embodiment 2 provides a communication method for a photovoltaic power station. The communication method for a photovoltaic power station provided by Embodiment 2 is applied to the photovoltaic power station communication system as described in Embodiment 1. Refer to Figure 1 , the communication method for a photovoltaic power station provided by Embodiment 2 includes: using a hybrid network structure composed of a ring network optical fiber and a Mesh node device for data transmission; wireless connection and wired connection cooperate to switch the transmission path when a certain Mesh node or a certain optical fiber link fails.

[0040] Since the steps of the communication method for a photovoltaic power station provided by Embodiment 2 correspond to the device functions included in the photovoltaic power station communication system provided by Embodiment 1, Embodiment 2 can be understood by referring to the description of Embodiment 1 and will not be elaborated here.

[0041] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and are not restrictive. Although the present invention has been described in detail with reference to the examples, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A photovoltaic power station communication system, characterized in that: include: Ring network optical fiber and Mesh node devices; The ring network optical fiber is deployed in the photovoltaic power station to provide a communication link between the Mesh node devices; The Mesh node device includes a fixed Mesh node device and a mobile Mesh node device; the fixed Mesh node device is deployed at a fixed position in a photovoltaic power station to establish a stable wireless communication network; the mobile Mesh node device is used for mobile assisted communication in the photovoltaic power station.

2. The photovoltaic power station communication system according to claim 1, characterized in that: The mobile Mesh node device includes a vehicle-mounted Mesh node device and a portable Mesh node device; the vehicle-mounted Mesh node device is deployed on a vehicle moving within the photovoltaic power station, and the portable Mesh node device is portable and deployed in any area within the photovoltaic power station that requires communication coverage.

3. The photovoltaic power station communication system according to claim 2, characterized in that: The Mesh node device includes a wired communication module, a wireless Mesh module, a radio frequency module, an antenna module and a control module; the wired communication module and the wireless Mesh module are both connected to the control module, and the antenna module, the radio frequency module and the wireless Mesh module are connected in sequence; the wired communication module is used to connect to the ring network optical fiber, and the wireless Mesh module is used to establish a wireless communication link; the control module is used to control the collaborative operation of the wireless connection and the wired connection, and to switch the transmission path when a Mesh node or an optical fiber link fails.

4. The photovoltaic power station communication system according to claim 3, characterized in that: The radio frequency module includes a radio frequency transceiver chip, a power amplifier, a low noise amplifier and a filter.

5. The photovoltaic power station communication system according to claim 3, characterized in that: The antenna module adopts an omnidirectional antenna.

6. The photovoltaic power station communication system according to claim 3, characterized in that: The Mesh node device also includes a power module; the power module is used to supply power to the Mesh node device.

7. The photovoltaic power station communication system according to claim 1, characterized in that: The transmission power of the fixed Mesh node device is higher than the transmission power of the mobile Mesh node device.

8. The photovoltaic power station communication system according to claim 2, characterized in that: The vehicle-mounted Mesh node device adopts one or more anti-interference technologies among spread spectrum, frequency hopping, and orthogonal frequency division multiplexing.

9. The photovoltaic power station communication system according to claim 3, characterized in that: The portable Mesh node device also includes an encryption module; the encryption module uses one or more encryption methods of packet encryption, channel encryption, and source encryption to encrypt data.

10. A photovoltaic power station communication method, characterized in that: The photovoltaic power station communication method is applied to a photovoltaic power station communication system as described in any one of claims 1 to 9, and the photovoltaic power station communication method includes: using a hybrid network structure consisting of ring network optical fiber and Mesh node devices to transmit data; wireless connection and wired connection work together to switch the transmission path when a Mesh node or an optical fiber link fails.

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