Photovoltaic power station communication method and system

Abstract

The application relates to the technical field of photovoltaic communication, and particularly relates to a photovoltaic power station communication method and system, wherein a LiFi transceiving module is arranged on each photovoltaic power station equipment and an inspection equipment; a wideband access base station module is arranged on the inspection equipment and a monitoring center; when the inspection equipment is close to the LiFi transceiving module of the photovoltaic power station equipment within a set distance, the LiFi transceiving module establishes a communication connection with the inspection equipment through a signal transmitter, receives an inspection instruction according to a signal receiver, and transmits operation data of the corresponding photovoltaic power station equipment to the inspection equipment; after the inspection equipment receives the operation data of the corresponding photovoltaic power station equipment, the operation data is uploaded to the monitoring center through the wideband access base station module. When a large amount of data is transmitted, the method has low data transmission delay and stable transmission.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic communication technology, and specifically to a communication method and system for photovoltaic power plants. Background Technology

[0002] Currently, the best communication system for photovoltaic (PV) power plants is represented by Huawei's power line carrier + LTE wireless transmission. Each subarray in a PV power plant is equipped with a data acquisition unit to collect data from the various inverters within the subarray. Communication between them typically uses traditional RS485. Traditional RS485 communication solutions require specially designed communication cables during construction, with armored cables buried underground or laid in conduits. Buried cables require trenching, increasing the difficulty and cost of power plant construction, especially for large power plants in remote and barren areas. Fiber optic communication offers advantages such as high transmission speed, large capacity, strong resistance to electromagnetic interference, and long transmission distance, but its construction is complex and requires professional personnel for installation and maintenance. Therefore, current PV power plants suffer from problems such as unstable transmission and high latency due to large data transmission volumes and long distances. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a photovoltaic power station communication method and system to address the shortcomings of the prior art, thereby solving the technical problems of unstable transmission and high latency caused by the large data transmission volume and long transmission distance in photovoltaic power stations.

[0004] The objective of this invention is achieved through the following technical solutions: In a first aspect, the present invention provides a photovoltaic power station communication method, comprising: LiFi transceiver modules are installed on all photovoltaic power station equipment and inspection equipment; broadband access base station modules are installed on the inspection equipment and monitoring center. When the inspection equipment approaches the LiFi transceiver module of the photovoltaic power station equipment at a set distance, the LiFi transceiver module establishes a communication connection with the inspection equipment through a signal transmitter, receives the inspection command according to the signal receiver, and transmits the corresponding operating data of the photovoltaic power station equipment to the inspection equipment. After receiving the operating data corresponding to each photovoltaic power station device, the inspection equipment uploads it to the monitoring center via the broadband access base station module.

[0005] As a further improvement of the present invention, both the signal transmitter and the signal receiver are installed on the side or below the photovoltaic module.

[0006] As a further improvement of the present invention, the position and angle of the LiFi signal receiver are adjusted according to the arrangement and angle of the photovoltaic modules to obtain the best signal reception effect.

[0007] As a further improvement of the present invention, the signal receiver includes a digital filter, which is used to process the received electrical signal and remove noise and interference generated by ambient light.

[0008] As a further improvement of the present invention, the LiFi transceiver module also includes an optical filter, which is used to filter out ambient light outside a specific wavelength range and only receive the wavelength range of the LiFi signal.

[0009] As a further improvement of the present invention, a polarization filter is also provided in the photovoltaic module. The polarization filter is used to reflect the LiFi signal and the reflected light into different polarization directions, thereby filtering out the reflected light and receiving only the LiFi signal.

[0010] As a further improvement of the present invention, the inspection equipment uses adaptive filtering and equalization technology to process the received signal, removing noise and distortion caused by interference from photovoltaic power station equipment.

[0011] As a further improvement of the present invention, the inspection equipment adopts multiple network interfaces and multiple input multiple output technology. When it receives the operating data of the photovoltaic power station equipment, the data is intelligently divided into multiple data packets and transmitted to the broadband access base station module simultaneously through different channels.

[0012] As a further improvement of the present invention, the broadband access base station module is equipped with a large-capacity buffer. When the inspection equipment uploads data, the base station first caches the data, and the cached data is then uploaded to the monitoring center through an encrypted communication link.

[0013] Secondly, the present invention also provides a photovoltaic power station communication system for implementing the above-mentioned photovoltaic power station communication method, including photovoltaic power station equipment, inspection equipment, and monitoring center; The photovoltaic power station equipment is equipped with a LiFi transceiver module; the LiFi transceiver module communicates with the inspection equipment through a signal transmitter and a signal receiver, and uploads the operating data to the inspection equipment; The inspection equipment is equipped with a LiFi transceiver module and a broadband access base station module. The inspection equipment receives the operating data of each photovoltaic power station equipment through a signal receiver and uploads the operating data to the monitoring center through the broadband access base station module. The monitoring center is equipped with a broadband access base station module, which is used to process the received operating data of each photovoltaic power station equipment and perform operation and maintenance based on the signal processing results.

[0014] The beneficial effects of this invention are as follows: The photovoltaic power station communication method of this invention achieves high-speed data transmission over short distances through a LiFi transceiver module, enabling rapid collection of operational data from photovoltaic power station equipment. Compared to traditional data acquisition methods, LiFi's high bandwidth allows for the acquisition of a large amount of information in a short time, such as real-time current, voltage, temperature, and multi-dimensional data on module power generation efficiency. This helps to comprehensively and timely grasp the operating status of the equipment, providing a rich data foundation for subsequent analysis and decision-making. Data transmission using LiFi is unaffected by electromagnetic interference, ensuring stable and accurate data acquisition even in the complex electromagnetic environment of a photovoltaic power station. Furthermore, due to the characteristics of optical signals, data transmission security is higher, effectively preventing data theft or tampering during acquisition and ensuring the integrity and reliability of power station operational data. When inspection equipment approaches the power station equipment, a connection is automatically established to acquire data, greatly simplifying the inspection process. Inspection personnel no longer need to perform complex wired connections or manually input commands, improving inspection efficiency. Simultaneously, the LiFi signal receiver can quickly receive inspection commands, making the allocation and execution of inspection tasks more flexible and precise. The broadband access base station module enables the data acquired by the inspection equipment to be stably and efficiently uploaded to the monitoring center. It enables seamless data transmission from field equipment to the monitoring center, facilitating centralized management and monitoring of the entire photovoltaic power station's operation. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of the present invention 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the photovoltaic power station communication method of the present invention; Figure 2 This is a schematic diagram of the photovoltaic power station communication system structure of the present invention. Detailed Implementation

[0016] To make the objectives and technical solutions of this invention clearer and easier to understand, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. The specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention.

[0017] The present invention provides a communication method and system for photovoltaic power plants, the communication method mainly comprising: LiFi transceiver modules are installed on all photovoltaic power station equipment and inspection equipment; broadband access base station modules are installed on the inspection equipment and monitoring center. When the inspection equipment approaches the LiFi transceiver module of the photovoltaic power station equipment at a set distance, the LiFi transceiver module establishes a communication connection with the inspection equipment through a signal transmitter, receives the inspection command according to the signal receiver, and transmits the corresponding operating data of the photovoltaic power station equipment to the inspection equipment. After receiving the operating data corresponding to each photovoltaic power station device, the inspection equipment uploads it to the monitoring center via the broadband access base station module.

[0018] The inspection equipment automatically establishes a connection and acquires data when it approaches the power plant equipment, greatly simplifying the inspection process. Inspection personnel no longer need to perform complex wired connections or manually input commands, improving inspection efficiency. Simultaneously, the LiFi signal receiver can quickly receive inspection commands, making the allocation and execution of inspection tasks more flexible and precise. The inspection equipment can acquire comprehensive and accurate equipment operating data, helping inspection personnel to promptly identify potential problems or fault points. For example, by comparing and analyzing historical and real-time data, potential equipment failures can be predicted in advance, enabling preventative maintenance, reducing equipment failure rates, and minimizing power generation losses due to equipment malfunctions.

[0019] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. The described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Example 1 like Figure 1 As shown in the figure, this embodiment provides a communication method for a photovoltaic power station, and the specific implementation method is as follows.

[0021] LiFi transceiver modules are installed on all photovoltaic power station equipment and inspection equipment; broadband access base station modules are installed on the inspection equipment and monitoring center.

[0022] When the inspection equipment approaches the LiFi transceiver module of the photovoltaic power station equipment at a set distance, the LiFi transceiver module establishes a communication connection with the inspection equipment through a signal transmitter, receives the inspection instructions according to the signal receiver, and transmits the corresponding operating data of the photovoltaic power station equipment to the inspection equipment.

[0023] When the inspection equipment approaches the LiFi transceiver module of the photovoltaic power station equipment to a pre-set distance, the signal transmitter in the LiFi transceiver module quickly initiates the communication connection process. Through precise positioning and calibration technology, a stable and efficient communication link is established with the inspection equipment. The signal receiver is always ready to receive various information and inspection instructions from the photovoltaic power station equipment. To obtain the best signal reception, technicians use professional measurement tools and known algorithms to finely adjust the position and angle of the LiFi signal receiver based on the unique arrangement and angle of the photovoltaic modules. For example, in areas where the photovoltaic modules are arranged in a matrix and at a certain tilt angle, the signal receiver is adjusted to maximize the reception of direct and reflected signals by calculating the path of light propagation and reflection patterns, and an appropriate angle is set to reduce signal attenuation and interference.

[0024] In this embodiment, a digital filter is integrated into the signal receiver. When an electrical signal enters the receiver, the digital filter immediately activates, using its built-in algorithm to perform in-depth processing on the received signal. This accurately identifies and removes various noise and interference signals generated by ambient light. Stray light and light fluctuations at different frequencies in the ambient light are effectively filtered out by the digital filter, leaving only the LiFi signal data within the set frequency band.

[0025] Meanwhile, the optical filters in the LiFi transceiver module also play a crucial role. These filters rigorously filter out ambient light outside a specific wavelength range, ensuring that only the wavelength range of the LiFi signal is received. This precise selection of wavelengths further improves the purity and stability of the signal.

[0026] Furthermore, this embodiment incorporates a unique polarization filter within the photovoltaic module. Utilizing the polarization characteristics of light, the LiFi signal and the light reflected from the photovoltaic module surface are reflected into different polarization directions. At the signal receiver, a dedicated polarization filter filters out the reflected light, receiving only the LiFi signal, significantly improving the signal's anti-interference capability.

[0027] In this embodiment, frequency modulation techniques such as orthogonal frequency division multiplexing (OFDM) and pulse position modulation (PPM) are used when frequency modulating the LiFi signal to improve the transmission speed.

[0028] Furthermore, when the photovoltaic power station covers a large area or there are obstacles preventing direct signal coverage, relay equipment is used to amplify the signal from the transmitter. The relay equipment receives the LiFi signal transmitted from the transmitter, amplifies and processes it, and then forwards it. For example, in this embodiment, multiple relay nodes are set up in the photovoltaic power station to form a mesh communication network, ensuring that the signal can cover every corner.

[0029] After receiving the operating data corresponding to each photovoltaic power station device, the inspection equipment uploads it to the monitoring center via the broadband access base station module.

[0030] After receiving operational data from the photovoltaic power station equipment, the inspection equipment employs signal processing technology to ensure the accuracy and integrity of the data. Specifically, the inspection equipment uses adaptive filtering and equalization techniques to process the received signals, removing noise and distortion caused by interference from the photovoltaic power station equipment. Adaptive filtering technology can adjust filtering parameters in real time according to changes in electromagnetic interference in the environment. In a photovoltaic power station, numerous electrical devices generate electromagnetic interference signals of different frequencies and intensities during operation. Adaptive filtering technology continuously monitors and analyzes the characteristics of the received signals, automatically generating a matching filtering mode to effectively remove noise and distortion caused by electrical equipment interference. Simultaneously, equalization technology compensates for signal distortion caused by multipath propagation and other factors during transmission by adjusting the amplitude and phase of the signal. For example, in this embodiment, multipath signal interference generated after the signal is reflected and refracted by objects such as photovoltaic modules and metal supports can be integrated and optimized by equalization technology to restore the signal quality to near the original transmission state.

[0031] To achieve efficient data transmission, the inspection equipment is equipped with multiple network interfaces and employs advanced multiple-input multiple-output (MIMO) technology. Upon receiving a large amount of operational data from the photovoltaic power station equipment, the data processing unit uses intelligent algorithms to rapidly segment this data into multiple data packets. These data packets are simultaneously transmitted to the broadband access base station module through different network channels. MIMO technology utilizes multiple antennas and signal processing paths to transmit data simultaneously on different frequencies and spatial resources. Each data packet has an independent transmission path and encoding method, which not only improves data transmission speed but also enhances data transmission reliability. Even if one channel encounters interference or signal attenuation, other channels can still ensure the normal transmission of some data, and then the complete data is recovered through data reconstruction and error correction mechanisms.

[0032] The broadband access base station module is equipped with a large-capacity buffer to handle various situations during data transmission. When the inspection equipment uploads data, the base station first buffers the received data. This caching mechanism plays a crucial role during network fluctuations, brief interruptions, or peak data transmission periods. In unstable network conditions, data can be temporarily stored in the buffer and uploaded again once the network recovers, preventing data loss. Simultaneously, the buffered data is transmitted to the monitoring center via an encrypted communication link. High-strength encryption algorithms, such as AES encryption combined with dynamic key management technology, are used to encrypt data packet by packet. During data transmission, each data packet is encrypted into ciphertext, and only the monitoring center with the corresponding decryption key can decrypt and read the data. This encrypted communication link effectively prevents the risk of data theft, tampering, or leakage during transmission, ensuring the security and confidentiality of photovoltaic power station data transmission.

[0033] In this embodiment, the monitoring center adopts a distributed storage architecture, distributing the received photovoltaic power station equipment operation data across multiple storage nodes to improve data storage reliability and read / write speed. Simultaneously, parallel processing technology is used to distribute data processing tasks across multiple processors or computing nodes for concurrent processing. Different types of equipment operation data are analyzed and calculated separately to quickly extract valuable information, such as equipment fault warnings and power generation efficiency analysis results, providing timely and accurate decision-making support for power station operation and maintenance management.

[0034] The monitoring center utilizes artificial intelligence and big data analytics algorithms to conduct in-depth analysis of the received data. Machine learning models automatically identify abnormal patterns and trends in the data to predict potential equipment failures. Simultaneously, the analysis results are presented in intuitive visualizations, such as dynamic charts and 3D models, to display information like the operating status of photovoltaic power station equipment and the distribution of power generation data. Maintenance personnel can view this information in real-time via a large monitoring screen or mobile terminal, quickly grasping the overall situation of the power station and making timely maintenance decisions and measures.

[0035] In addition, the monitoring center formulates corresponding operation and maintenance strategies. If a equipment failure is detected, the system automatically generates a maintenance work order and assigns it to the appropriate maintenance personnel based on the failure type and equipment location. Simultaneously, it provides maintenance personnel with detailed failure information and maintenance guidance, including historical maintenance records and relevant technical documents. When the equipment is operating normally, the monitoring center optimizes scheduling based on data such as power generation efficiency, adjusting the operating parameters of the photovoltaic modules or arranging equipment maintenance plans to improve the overall operating efficiency and reliability of the photovoltaic power station.

[0036] Example 2 like Figure 2As shown, this embodiment provides a photovoltaic power station communication system for implementing the photovoltaic power station communication method described in Embodiment 1. The system includes photovoltaic power station equipment, inspection equipment, and a monitoring center. The photovoltaic power station equipment is equipped with a LiFi transceiver module; the LiFi transceiver module communicates with the inspection equipment through a signal transmitter and a signal receiver, and uploads the operating data to the inspection equipment; The inspection equipment is equipped with a LiFi transceiver module and a broadband access base station module. The inspection equipment receives the operating data of each photovoltaic power station equipment through a signal receiver and uploads the operating data to the monitoring center through the broadband access base station module. The monitoring center is equipped with a broadband access base station module, which is used to process the received operating data of each photovoltaic power station equipment and to perform operation and maintenance based on the signal processing results.

[0037] In this embodiment, the LiFi transceiver module is integrated into a chip, which also integrates a data acquisition module. This data acquisition module collects data through a close connection with the device's internal sensor network. For photovoltaic modules, the module can collect key parameters such as voltage, current, and temperature; for devices such as inverters, it can acquire information such as operating frequency, power factor, and operating status. The chip also includes a processing module, which performs preliminary processing and encoding of the collected data, preparing it according to a preset format for transmission.

[0038] The signal transmitter utilizes a high-efficiency LED light source as the signal source, loading data onto a visible light signal through modulation technology. The modulation method employed can adaptively adjust according to the environment and data volume; for example, higher-order modulation is used to increase the transmission rate during peak data periods with less interference. The signal receiver is equipped with a high-sensitivity photodiode array capable of capturing weak light signals. The signal processing circuitry in the receiver amplifies, filters, and demodulates the received signal. To improve anti-interference capabilities, an intelligent interference identification algorithm is employed, capable of distinguishing between ambient light and useful information in the LiFi signal, ensuring accurate data reception.

[0039] Furthermore, the LiFi transceiver module on the inspection equipment collaborates with the broadband access base station module. The LiFi transceiver module is responsible for receiving optical signal data from the photovoltaic power station equipment. Upon entering the photovoltaic power station area, the LiFi transceiver module can quickly identify and establish communication links with surrounding power station equipment. Simultaneously, the LiFi transceiver module has signal enhancement and error correction functions, automatically repairing or requesting retransmission for situations where the signal is weakened or errors occur due to distance or interference. The broadband access base station module converts the received LiFi data into a format suitable for remote transmission and uses advanced communication protocols to exchange data with the monitoring center.

[0040] During data upload, the inspection equipment first caches and integrates the received data. It then categorizes and sorts the data according to priority and importance, prioritizing the upload of urgent fault information and operational data of critical equipment. Simultaneously, data compression technology is used to reduce data volume without sacrificing accuracy, thereby improving transmission efficiency. Multi-channel transmission technology is employed to simultaneously send data on different network frequency bands and channels, ensuring fast and stable data upload.

Claims

1. A communication method for a photovoltaic power station, characterized in that, include: LiFi transceiver modules are installed on all photovoltaic power station equipment and inspection equipment; Broadband access base station modules are configured on inspection equipment and monitoring centers; When the inspection equipment approaches the LiFi transceiver module of the photovoltaic power station equipment at a set distance, the LiFi transceiver module establishes a communication connection with the inspection equipment through the signal transmitter and receives the inspection command according to the signal receiver. Transmit the corresponding photovoltaic power station equipment's operating data to the inspection equipment; After receiving the operating data corresponding to each photovoltaic power station device, the inspection equipment uploads it to the monitoring center via the broadband access base station module.

2. The photovoltaic power station communication method according to claim 1, characterized in that, The signal transmitter and signal receiver are both installed on the side or below the photovoltaic module.

3. The photovoltaic power station communication method according to claim 2, characterized in that, Adjust the position and angle of the LiFi signal receiver according to the arrangement and angle of the photovoltaic modules to obtain the best signal reception effect.

4. The photovoltaic power station communication method according to claim 2, characterized in that, The signal receiver includes a digital filter, which is used to process the received electrical signal and remove noise and interference generated by ambient light.

5. The photovoltaic power station communication method according to claim 1, characterized in that, The LiFi transceiver module also includes an optical filter, which is used to filter out ambient light outside a specific wavelength range and only receive the wavelength range of the LiFi signal.

6. The photovoltaic power station communication method according to claim 1, characterized in that, The photovoltaic module is also equipped with a polarization filter, which is used to reflect the LiFi signal and the reflected light into different polarization directions, thereby filtering out the reflected light and receiving only the LiFi signal.

7. The photovoltaic power station communication method according to claim 5 or 6, characterized in that, The inspection equipment uses adaptive filtering and equalization technology to process the received signals, removing noise and distortion caused by interference from photovoltaic power station equipment.

8. The photovoltaic power station communication method according to claim 7, characterized in that, The inspection equipment uses multiple network interfaces and multiple input multiple output technology. When it receives the operating data of the photovoltaic power station equipment, the data is intelligently divided into multiple data packets and transmitted to the broadband access base station module simultaneously through different channels.

9. The photovoltaic power station communication method according to claim 1, characterized in that, The broadband access base station module is equipped with a large-capacity buffer. When the inspection equipment uploads data, the base station first caches the data, and then the cached data is uploaded to the monitoring center through an encrypted communication link.

10. A photovoltaic power station communication system for implementing the photovoltaic power station communication method according to any one of claims 1-9, characterized in that, This includes photovoltaic power station equipment, inspection equipment, and monitoring centers. The photovoltaic power station equipment is equipped with a LiFi transceiver module; the LiFi transceiver module communicates with the inspection equipment through a signal transmitter and a signal receiver, and uploads the operating data to the inspection equipment; The inspection equipment is equipped with a LiFi transceiver module and a broadband access base station module. The inspection equipment receives the operating data of each photovoltaic power station equipment through a signal receiver and uploads the operating data to the monitoring center through the broadband access base station module. The monitoring center is equipped with a broadband access base station module, which is used to process the received operating data of each photovoltaic power station equipment and perform operation and maintenance based on the signal processing results.

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