Distributed photovoltaic grid-connected power generation operation system

Abstract

This invention provides a distributed photovoltaic grid-connected power generation operation system, relating to the field of distributed photovoltaic grid-connected power generation technology. The photovoltaic grid-connected server is communicatively connected to each photovoltaic power generation unit and a photovoltaic power generation monitoring terminal. The photovoltaic grid-connected server monitors the operating status of each photovoltaic power generation unit and the power grid. Through the photovoltaic power generation network communication topology diagram, the photovoltaic grid-connected server obtains the operating and power generation status of the photovoltaic power generation units. The photovoltaic grid-connected server collects data from each device in the photovoltaic power generation units and displays it in a photovoltaic grid-connected power generation monitoring indicator list. During system operation, the system monitors each device in the photovoltaic power generation units based on the server application backend system. The photovoltaic grid-connected server statistically analyzes the collected data, and when abnormalities occur in the operating data of the photovoltaic power generation units, the photovoltaic grid-connected server sends alarm information to the photovoltaic power generation monitoring terminal, realizing real-time monitoring of the photovoltaic power generation units.

Description

Technical Field

[0001] This invention relates to the field of distributed photovoltaic grid-connected power generation technology, and in particular to a distributed photovoltaic grid-connected power generation operation system. Background Technology

[0002] Distributed photovoltaic (PV) power generation has experienced rapid development. It converts clean and renewable solar energy into electricity to power loads and can also be fed into the grid. Compared to traditional power generation methods, it allows for localized power generation, reducing line losses. Integrating distributed PV power into the grid enables simultaneous power generation and consumption, allowing surplus power to be provided to other users and contributing to improved efficiency of the public power grid.

[0003] Because distributed photovoltaic (PV) power generation has been installed and used in many areas, and due to the wide distribution and large number of PV devices, it is difficult to effectively monitor the status of distributed PV power generation. If anomalies occur, they cannot be detected in a timely manner. Furthermore, distributed PV power generation is implemented for individual users or electricity consumers, who can only know the status of their own distributed PV power generation and cannot interact with the data. Therefore, if low power generation efficiency or malfunctions occur, timely solutions cannot be provided. Summary of the Invention

[0004] This invention provides a distributed photovoltaic grid-connected power generation operation system. The system enables real-time monitoring of photovoltaic power generation units, communication between photovoltaic power generation units, and interaction of user experiences, thereby improving power generation efficiency and effectiveness.

[0005] The distributed photovoltaic grid-connected power generation operation system includes: photovoltaic power generation facilities in various areas, photovoltaic grid-connected servers, and photovoltaic power generation monitoring terminals;

[0006] The photovoltaic grid-connected server communicates with each photovoltaic power generation unit and the photovoltaic power generation monitoring terminal, and monitors the operating status of each photovoltaic power generation unit and the power grid.

[0007] The photovoltaic grid-connected server obtains the operating status and power generation status of the photovoltaic power generation system through the photovoltaic power generation network communication topology diagram; the photovoltaic grid-connected server controls the photovoltaic power generation system to start, stop, and restart through the TCP / IP communication protocol, and is required to monitor the power supply operation status and power supply parameters in real time, and provide visualized statistical reports;

[0008] The photovoltaic grid-connected server collects data from various devices in the photovoltaic power generation system and displays it in the photovoltaic grid-connected power generation monitoring index list; during system operation, the server application backend system monitors various devices in the photovoltaic power generation system.

[0009] The photovoltaic grid-connected server performs statistical analysis on the collected data. When abnormalities occur in the operating data of the photovoltaic power generation unit, the photovoltaic grid-connected server sends alarm information to the photovoltaic power generation monitoring terminal.

[0010] Preferably, the photovoltaic grid-connected server uses a PaaS layer to build a cloud storage terminal and builds monitoring and scheduling services for photovoltaic power generation data and grid connection data. It also builds photovoltaic power generation data and grid connection data push, analysis, and CRUD operations. The photovoltaic grid-connected server supports configuring monitoring interface functions according to user needs, and one-click upload and deployment can be achieved after configuration.

[0011] Preferably, the photovoltaic grid-connected server has a terminal layer that provides service support for the photovoltaic power generation monitoring terminal, enabling data monitoring and processing of the system;

[0012] The photovoltaic grid-connected server has a development layer that supports system program development based on different application scenarios and photovoltaic conditions.

[0013] The photovoltaic grid-connected server has an integration layer that integrates and connects various modules and devices in the system.

[0014] Preferably, the photovoltaic power generation mechanism includes: a photovoltaic array, a power generation controller, a DC-DC converter, and a DC-AC inverter;

[0015] The photovoltaic array is connected to the battery via a power generation controller and a DC-DC converter;

[0016] The photovoltaic array is connected to the grid through a power generation controller and a DC / AC inverter to enable photovoltaic power generation to be fed into the grid.

[0017] Preferably, the photovoltaic grid-connected server divides photovoltaic power generation facilities that are close to each other into a photovoltaic power generation zone, and establishes a local area communication network within the photovoltaic power generation zone;

[0018] The photovoltaic power generation unit communicates with neighboring photovoltaic power generation units and exchanges photovoltaic power generation information;

[0019] The photovoltaic grid-connected server collects power information from each photovoltaic power generation unit, calculates the power output ratio, compares it with the prediction model, and outputs control increments to the photovoltaic power generation unit.

[0020] Preferably, after the photovoltaic grid-connected server obtains the power output ratio and photovoltaic power generation information sent by the photovoltaic power generation unit, the output control signal is transmitted to the photovoltaic power generation unit through an integrator. The server predicts the output of the photovoltaic power generation units adjacent to the photovoltaic power generation unit, calculates the average predicted output, and feeds it back to the photovoltaic power generation units in the photovoltaic power generation area to balance the output error between adjacent photovoltaic power generation units, so that the output current and output power of the photovoltaic power generation unit meet the preset requirements.

[0021] Preferably, the photovoltaic grid-connected server is used for hierarchical access control of the photovoltaic power generation monitoring terminal;

[0022] The photovoltaic grid-connected server is used to control the access of various photovoltaic power generation monitoring terminals; when compiling the code, the photovoltaic grid-connected server generates different monitoring terminal app versions and provides management APIs for the photovoltaic power generation monitoring terminals.

[0023] The photovoltaic grid-connected server uses the PKI / CA system to build the identity recognition of photovoltaic power generation monitoring terminals, and uses soft certificates to identify the uniqueness and security of photovoltaic power generation monitoring terminals;

[0024] The photovoltaic grid-connected server builds an access APP and provides an access portal, integrating multiple network access methods such as 4G, 5G, or Wi-Fi to connect photovoltaic power generation monitoring terminals to the network; the photovoltaic grid-connected server has a VPN module and a digital certificate module, providing a unified access portal for photovoltaic power generation monitoring terminals to access the network;

[0025] When the photovoltaic power generation monitoring terminal connects to the photovoltaic grid-connected server via 4G, 5G, or Wi-Fi, the photovoltaic grid-connected server authenticates the user through a VPN module combined with a mobile digital certificate and uses an SSL secure tunnel for encrypted connection.

[0026] Preferably, the photovoltaic grid-connected server uses a sandbox isolation method to encrypt the status data of the photovoltaic power generation mechanism;

[0027] The photovoltaic grid-connected server adopts multiple security protection methods, including terminal equipment security management, APP security management, and photovoltaic power generation structure security management, and constructs a communication method from three aspects: photovoltaic power generation structure, communication network, and photovoltaic power generation monitoring terminal.

[0028] The photovoltaic grid-connected server monitors the photovoltaic power generation system throughout its entire lifecycle, stores the registration information of the photovoltaic power generation system, records the parameter configuration of the photovoltaic power generation system, and monitors the operation process of the photovoltaic power generation system.

[0029] The photovoltaic grid-connected server provides users with automatic operation of photovoltaic power generation units based on PLC programs, timed push of operating data, data backup, and remote alarm functions.

[0030] Preferably, the photovoltaic grid-connected server collects status data of the designated photovoltaic power generation unit and grid data in real time;

[0031] The photovoltaic grid-connected server temporarily stores the status data of the photovoltaic power generation system and the grid data according to a preset classification method;

[0032] The photovoltaic grid-connected server acquires the risk assessment strategy for the operation of photovoltaic power generation institutions and evaluates the status data of photovoltaic power generation institutions and grid data;

[0033] Assess whether there is a fault development trend in the current status data of the photovoltaic power generation system, the previously collected status data, and the grid data, and display the assessment results.

[0034] Preferably, the photovoltaic grid-connected server also performs risk level assessment on the current status data of the photovoltaic power generation institution, the previously collected status data, and the grid data according to a preset risk assessment strategy, and saves the risk assessment results;

[0035] The preset risk assessment strategy is established based on the fault diagnosis experience data of photovoltaic power generation institutions, and a photovoltaic power generation fault diagnosis model is configured to assess the risk level of photovoltaic power generation institutions. The assessment results and risk level are then sent to the photovoltaic power generation monitoring terminal for users to monitor in real time.

[0036] As can be seen from the above technical solutions, the present invention has the following advantages:

[0037] The distributed photovoltaic grid-connected power generation operation system provided by this invention can monitor various devices and operational data in the photovoltaic power generation system in real time. When abnormalities occur in the operational data of the photovoltaic power generation system, the photovoltaic grid-connected server sends alarm information to the photovoltaic power generation monitoring terminal, enabling users to handle the situation promptly. This invention also constructs a system for pushing, analyzing, adding, deleting, modifying, and querying photovoltaic power generation data and grid-connected data; helping users monitor photovoltaic power generation and achieving standardized photovoltaic power generation monitoring.

[0038] This invention enables the development of photovoltaic power generation environment software, the development of photovoltaic power generation component applications, and the development and use of system engines, and supports the testing and monitoring of the developed system; the photovoltaic grid-connected server has an integration layer that integrates and connects various modules and devices in the system to achieve data interconnection.

[0039] To ensure the access security of distributed photovoltaic (PV) grid-connected power generation systems, this invention establishes a unified method for user mobile certificate application, download, and authentication on the PV grid-connected server based on a digital certificate authentication system. This ensures the security and reliability of the system's PV monitoring process. The PV grid-connected server uses digital certificate authentication, avoiding the cumbersome processes of VPN login and sub-account login previously required by using an app, and also ensuring the security of PV data transmission. Attached Figure Description

[0040] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 A schematic diagram of a distributed photovoltaic grid-connected power generation system;

[0042] Figure 2 This is a schematic diagram of an example of a distributed photovoltaic grid-connected power generation system. Detailed Implementation

[0043] The distributed photovoltaic grid-connected power generation system architecture provided by this invention may include a photovoltaic power generation monitoring terminal, a photovoltaic power generation mechanism, a network, and a photovoltaic grid-connected server. The network is a medium used to provide communication links between the photovoltaic power generation monitoring terminal, the photovoltaic power generation mechanism, and the photovoltaic grid-connected server. The network may include various connection types, such as wired or wireless communication links or fiber optic cables, etc.

[0044] It should be understood that Figure 1 and 2 The number of photovoltaic (PV) power generation monitoring terminals, PV power generation structures, networks, and PV grid-connected servers shown in the diagram is merely illustrative. Depending on implementation needs, any number of PV power generation monitoring terminals, PV power generation structures, and PV grid-connected servers can be used. For example, a PV grid-connected server can be a server cluster composed of multiple servers.

[0045] Users can use the photovoltaic power generation monitoring terminal to interact with the photovoltaic grid-connected server via a network to receive or send distributed photovoltaic data. The photovoltaic power generation monitoring terminal may include a wireless communication unit, an audio / video (A / V) input unit, a user input unit, a sensing unit, an output unit, a memory, an interface unit, a controller, and a power supply unit, etc. However, it should be understood that it is not required to implement all the components shown. More or fewer components may be implemented alternatively. The components of the mobile terminal will be described in detail below.

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] The distributed photovoltaic grid-connected power generation operation system includes: photovoltaic power generation facilities in various areas, photovoltaic grid-connected servers, and photovoltaic power generation monitoring terminals;

[0048] The photovoltaic grid-connected server communicates with each photovoltaic power generation unit and the photovoltaic power generation monitoring terminal, and monitors the operating status of each photovoltaic power generation unit and the power grid.

[0049] The photovoltaic grid-connected server obtains the operating status and power generation status of the photovoltaic power generation system through the photovoltaic power generation network communication topology diagram; the photovoltaic grid-connected server controls the photovoltaic power generation system to start, stop, and restart through the TCP / IP communication protocol, and is required to monitor the power supply operation status and power supply parameters in real time, and provide visualized statistical reports;

[0050] The photovoltaic grid-connected server collects data from various devices in the photovoltaic power generation system and displays it in the photovoltaic grid-connected power generation monitoring index list. During system operation, it monitors various devices in the photovoltaic power generation system based on the server application backend system. The photovoltaic grid-connected server performs statistics and analysis on the collected data. When abnormalities occur in the operating data of the photovoltaic power generation system, the photovoltaic grid-connected server sends alarm information to the photovoltaic power generation monitoring terminal.

[0051] In embodiments of this invention, the photovoltaic grid-connected server employs a PaaS layer to construct a cloud storage terminal and builds monitoring and scheduling services for photovoltaic power generation data and grid-connected data. It also provides push, analysis, and CRUD operations for photovoltaic power generation data and grid-connected data; assisting users in monitoring photovoltaic power generation and achieving standardized monitoring of photovoltaic power generation. The photovoltaic grid-connected server supports configuring monitoring interface functions according to user needs, enabling one-click uploading and deployment after configuration.

[0052] The photovoltaic grid-connected server has a terminal layer that provides service support for photovoltaic power generation monitoring terminals, enabling data monitoring and processing of the system; a development layer that supports system program development based on different application scenarios and photovoltaic states; and an integration layer that integrates and connects various modules and devices in the system.

[0053] The photovoltaic grid-connected server has distributed operation and monitoring functions, enabling distributed coordinated monitoring services. It has a distributed service call framework to provide multi-port monitoring services for photovoltaic power generation status. It can also configure the monitoring interface according to user needs, and after configuration, it can achieve one-click upload and deployment, realizing the unification of data between photovoltaic power generation institutions, photovoltaic grid-connected servers, and photovoltaic power generation monitoring terminals.

[0054] The terminal layer serves as the portal for communication between users and the photovoltaic grid-connected server, and is configured with ports based on the operating environment; it can realize access verification, identity verification, system application software configuration, database operations, etc. of photovoltaic power generation monitoring terminals;

[0055] The photovoltaic grid-connected server has a development layer that supports system program development based on different application scenarios and photovoltaic conditions. The development layer can be used for the development of photovoltaic power generation environment software, photovoltaic power generation component applications, and system engine, and supports the testing and monitoring of the developed system. The photovoltaic grid-connected server also has an integration layer that integrates and interfaces various modules and devices in the system to achieve data interconnection.

[0056] In embodiments of the present invention, the photovoltaic power generation mechanism includes: a photovoltaic array, a power generation controller, a DC-DC converter, and a DC-AC inverter; the photovoltaic array is connected to a battery through the power generation controller and the DC-DC converter; the photovoltaic array is connected to the power grid through the power generation controller and the DC-AC inverter to realize photovoltaic power generation to the grid.

[0057] In embodiments of the present invention, the photovoltaic grid-connected server divides nearby photovoltaic power generation facilities into a photovoltaic power generation zone and establishes a local area communication network within the photovoltaic power generation zone. Photovoltaic power generation facilities communicate with adjacent facilities and exchange photovoltaic power generation information. This information may include the maximum possible power output, power generation voltage, current, and the voltage of the grid bus. The photovoltaic grid-connected server collects power information from each photovoltaic power generation facility, calculates the power output ratio, compares it using a predictive model, and outputs control increments to the photovoltaic power generation facilities.

[0058] After the photovoltaic grid-connected server obtains the power output ratio and photovoltaic power generation information sent by the photovoltaic power generation unit, the output control signal is transmitted to the photovoltaic power generation unit through the integrator. The server predicts the output of the photovoltaic power generation unit adjacent to the photovoltaic power generation unit, calculates the average predicted output, and feeds it back to the photovoltaic power generation units in the photovoltaic power generation area to balance the output error between adjacent photovoltaic power generation units, so that the output current and output power of the photovoltaic power generation unit meet the preset requirements.

[0059] In embodiments of the present invention, the photovoltaic grid-connected server is used to perform hierarchical access control for the photovoltaic power generation monitoring terminal;

[0060] The photovoltaic grid-connected server is used to access and control various photovoltaic power generation monitoring terminals; when compiling the code, the photovoltaic grid-connected server generates different monitoring terminal app versions and provides management APIs for the photovoltaic power generation monitoring terminals.

[0061] The photovoltaic grid-connected server generates a monitoring terminal APP and pushes it to the photovoltaic power generation monitoring terminal. The photovoltaic grid-connected server is used to control the access of each photovoltaic power generation monitoring terminal. When compiling the code, the photovoltaic grid-connected server generates different monitoring terminal APP versions and provides management APIs for the photovoltaic power generation monitoring terminals.

[0062] The photovoltaic grid-connected server utilizes the PKI / CA system to construct the identity recognition of photovoltaic power generation monitoring terminals, and uses soft certificates to identify the uniqueness and security of photovoltaic power generation monitoring terminals. The photovoltaic grid-connected server builds an access APP and provides an access portal, integrating multiple network access methods such as 4G, 5G, or Wi-Fi to connect photovoltaic power generation monitoring terminals to the network. The photovoltaic grid-connected server has a VPN module and a digital certificate module, providing a unified access portal for photovoltaic power generation monitoring terminals.

[0063] When the photovoltaic power generation monitoring terminal connects to the photovoltaic grid-connected server via 4G, 5G, or Wi-Fi, the photovoltaic grid-connected server authenticates the user through a VPN module combined with a mobile digital certificate and uses an SSL secure tunnel for encrypted connection.

[0064] When the photovoltaic power generation monitoring terminal connects to the photovoltaic grid-connected server through the APN channel, the photovoltaic grid-connected server establishes a secure connection by combining APN access permission verification with mobile digital certificate authentication. Data transmission is encrypted using the platform's own data encryption algorithm before transmission.

[0065] To ensure the access security of distributed photovoltaic (PV) grid-connected power generation systems, this invention establishes a unified method for user mobile certificate application, download, and authentication on the PV grid-connected server based on a digital certificate authentication system. This ensures the security and reliability of the system's PV monitoring process. The PV grid-connected server uses digital certificate authentication, avoiding the cumbersome processes of VPN login and sub-account login previously required by using an app, and also ensuring the security of PV data transmission.

[0066] The photovoltaic grid-connected server uses a sandbox isolation method to encrypt the status data of the photovoltaic power generation system, ensuring the security of photovoltaic power generation data. The server employs multiple security protection methods, including terminal device security management, APP security management, and photovoltaic power generation system security management, constructing a communication system from three aspects: the photovoltaic power generation system, the communication network, and the photovoltaic power generation monitoring terminal. This achieves safe and reliable distributed photovoltaic grid-connected power generation operation and control. The photovoltaic grid-connected server monitors the photovoltaic power generation system throughout its entire lifecycle, stores the registration information of the photovoltaic power generation system, records the parameter configuration of the photovoltaic power generation system, and monitors the operation process of the photovoltaic power generation system.

[0067] The photovoltaic grid-connected server provides users with PLC-based automatic operation of photovoltaic power generation systems, timed push of operating data, data backup, and remote alarm functions. This effectively reduces the workload of maintenance personnel.

[0068] The photovoltaic grid-connected server provides SDK identity authentication for iOS and Android operating systems, provides identity authentication services for photovoltaic power generation monitoring terminals, provides identity token verification for each photovoltaic power generation monitoring terminal, monitors photovoltaic power generation monitoring terminal access, firewall connection count, APN network traffic, VPN network traffic, etc., and has the ability to alert for abnormal status, prevent SQL injection, prevent cross-site scripting attacks, and prevent web tampering.

[0069] In embodiments of the present invention, the photovoltaic grid-connected server collects the status data of a designated photovoltaic power generation facility and the grid data in real time; the photovoltaic grid-connected server temporarily stores the status data of the photovoltaic power generation facility and the grid data according to a preset classification method; the photovoltaic grid-connected server obtains the risk assessment strategy for the operation of the photovoltaic power generation facility and evaluates the status data of the photovoltaic power generation facility and the grid data; it evaluates whether there is a fault development trend in the current status data of the photovoltaic power generation facility, the previously collected status data, and the grid data, and displays the evaluation results.

[0070] Specifically, the photovoltaic grid-connected server also performs risk level assessments on the current status data of the photovoltaic power generation institution, the previously collected status data, and the grid data according to the preset risk assessment strategy, and saves the risk assessment results;

[0071] The preset risk assessment strategy is established based on the fault diagnosis experience data of photovoltaic power generation institutions, and a photovoltaic power generation fault diagnosis model is configured to assess the risk level of photovoltaic power generation institutions. The assessment results and risk level are then sent to the photovoltaic power generation monitoring terminal for users to monitor in real time.

[0072] The units and algorithm steps of the various examples described in the embodiments of the distributed photovoltaic grid-connected power generation operation system provided by this invention can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0073] The block diagrams in the accompanying drawings of the distributed photovoltaic grid-connected power generation system illustrate the architecture, functionality, and operation of possible implementations of devices, methods, and computer program products according to various embodiments of this disclosure. In this regard, each block in the flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and combinations of blocks in the block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0074] In the distributed photovoltaic grid-connected power generation system provided by this invention, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the couplings or direct couplings or communication connections shown or discussed may be indirect couplings or communication connections through some interfaces, devices, or units, or they may be electrical, mechanical, or other forms of connection.

[0075] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A distributed photovoltaic grid-connected power generation operation system, characterized in that, include: Photovoltaic power generation equipment, photovoltaic grid-connected servers, and photovoltaic power generation monitoring terminals; The photovoltaic grid-connected server communicates with each photovoltaic power generation unit and the photovoltaic power generation monitoring terminal, and monitors the operating status of each photovoltaic power generation unit and the power grid. The photovoltaic grid-connected server obtains the operating status and power generation status of the photovoltaic power generation system through the photovoltaic power generation network communication topology diagram; the photovoltaic grid-connected server controls the photovoltaic power generation system to start, stop, and restart through the TCP / IP communication protocol, and is required to monitor the power supply operation status and power supply parameters in real time, and provide visualized statistical reports; The photovoltaic grid-connected server collects data from various devices in the photovoltaic power generation system and displays it in the photovoltaic grid-connected power generation monitoring index list; during system operation, the server application backend system monitors various devices in the photovoltaic power generation system. The photovoltaic grid-connected server performs statistical analysis on the collected data. When abnormalities occur in the operating data of the photovoltaic power generation unit, the photovoltaic grid-connected server sends alarm information to the photovoltaic power generation monitoring terminal. The photovoltaic grid-connected server divides photovoltaic power generation facilities that are close to each other into a photovoltaic power generation zone and establishes a local area communication network within the photovoltaic power generation zone; The photovoltaic power generation unit communicates with neighboring photovoltaic power generation units and exchanges photovoltaic power generation information; The photovoltaic grid-connected server collects the power information of each photovoltaic power generation unit, calculates the power output ratio, compares it with the prediction model, and outputs the control increment to the photovoltaic power generation unit. After the photovoltaic grid-connected server obtains the power output ratio and photovoltaic power generation information sent by the photovoltaic power generation unit, the output control signal is transmitted to the photovoltaic power generation unit through the integrator. The server predicts the output of the photovoltaic power generation unit adjacent to the photovoltaic power generation unit, calculates the average predicted output, and feeds it back to the photovoltaic power generation units in the photovoltaic power generation area to balance the output error between adjacent photovoltaic power generation units, so that the output current and output power of the photovoltaic power generation unit meet the preset requirements.

2. The distributed photovoltaic grid-connected power generation system according to claim 1, characterized in that, The photovoltaic grid-connected server uses the PaaS layer to build a cloud storage terminal and builds monitoring and scheduling services for photovoltaic power generation data and grid-connected data. It also builds photovoltaic power generation data and grid-connected data push, analysis, and CRUD operations. The photovoltaic grid-connected server supports configuring the monitoring interface according to user needs, and once configured, it enables one-click uploading and deployment.

3. The distributed photovoltaic grid-connected power generation operation system according to claim 1, characterized in that, The photovoltaic grid-connected server has a terminal layer that provides service support for photovoltaic power generation monitoring terminals, enabling data monitoring and processing of the system. The photovoltaic grid-connected server has a development layer that supports system program development based on different application scenarios and photovoltaic conditions. The photovoltaic grid-connected server has an integration layer that integrates and connects various modules and devices in the system.

4. The distributed photovoltaic grid-connected power generation operation system according to claim 1, characterized in that, A photovoltaic power generation system includes: a photovoltaic array, a power generation controller, a DC-DC converter, and a DC-AC inverter; The photovoltaic array is connected to the battery via a power generation controller and a DC-DC converter; The photovoltaic array is connected to the grid through a power generation controller and a DC / AC inverter to enable photovoltaic power generation to be fed into the grid.

5. The distributed photovoltaic grid-connected power generation system according to claim 1, characterized in that, The photovoltaic grid-connected server is used for hierarchical access management of photovoltaic power generation monitoring terminals; The photovoltaic grid-connected server is used to control the access of various photovoltaic power generation monitoring terminals; when compiling the code, the photovoltaic grid-connected server generates different monitoring terminal app versions and provides management APIs for the photovoltaic power generation monitoring terminals. The photovoltaic grid-connected server uses the PKI / CA system to build the identity recognition of photovoltaic power generation monitoring terminals, and uses soft certificates to identify the uniqueness and security of photovoltaic power generation monitoring terminals; The photovoltaic grid-connected server connects the photovoltaic power generation monitoring terminal to the network by building an access APP and providing an access portal, and by integrating multiple network access methods such as 4G, 5G and Wi-Fi. The photovoltaic grid-connected server has a VPN module and a digital certificate module, providing a unified access point for photovoltaic power generation monitoring terminals. When the photovoltaic power generation monitoring terminal connects to the photovoltaic grid-connected server via 4G, 5G, or Wi-Fi, the photovoltaic grid-connected server authenticates the user through a VPN module combined with a mobile digital certificate and uses an SSL secure tunnel for encrypted connection.

6. The distributed photovoltaic grid-connected power generation system according to claim 5, characterized in that, The photovoltaic grid-connected server uses a sandbox isolation method to encrypt the status data of the photovoltaic power generation system; The photovoltaic grid-connected server adopts multiple security protection methods, including terminal equipment security management, APP security management, and photovoltaic power generation structure security management, and constructs a communication method from three aspects: photovoltaic power generation structure, communication network, and photovoltaic power generation monitoring terminal. The photovoltaic grid-connected server monitors the photovoltaic power generation system throughout its entire lifecycle, stores the registration information of the photovoltaic power generation system, records the parameter configuration of the photovoltaic power generation system, and monitors the operation process of the photovoltaic power generation system. The photovoltaic grid-connected server provides users with automatic operation of photovoltaic power generation units based on PLC programs, timed push of operating data, data backup, and remote alarm functions.

7. The distributed photovoltaic grid-connected power generation operation system according to claim 1, characterized in that, The photovoltaic grid-connected server collects real-time status data of designated photovoltaic power generation institutions and grid data. The photovoltaic grid-connected server temporarily stores the status data of the photovoltaic power generation system and the grid data according to a preset classification method; The photovoltaic grid-connected server acquires the risk assessment strategy for the operation of photovoltaic power generation institutions and evaluates the status data of photovoltaic power generation institutions and grid data; Assess whether there is a fault development trend in the current status data of the photovoltaic power generation system, the previously collected status data, and the grid data, and display the assessment results.

8. The distributed photovoltaic grid-connected power generation operation system according to claim 7, characterized in that, The photovoltaic grid-connected server also performs risk level assessments on the current status data of the photovoltaic power generation institution, the previously collected status data, and the grid data according to the preset risk assessment strategy, and saves the risk assessment results. The preset risk assessment strategy is established according to fault diagnosis experience data of the photovoltaic power generation mechanism, and a photovoltaic power generation fault diagnosis model is configured to assess the risk level of the photovoltaic power generation mechanism; the assessment result and the risk level are sent to a photovoltaic power generation monitoring terminal for real-time monitoring by a user.

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