Component-level photovoltaic optimization energy storage control system

Abstract

The invention discloses a module-level photovoltaic optimization energy storage control system, which is characterized in that photovoltaic modules convert light energy into electric energy and transmit the electric energy to a photovoltaic optimal storage terminal, the photovoltaic optimal storage terminal carries out energy storage management and carries out maximum power point tracking on each photovoltaic module, so that each photovoltaic module is at the maximum power point; the monitoring gateway uploads data of the photovoltaic optimal storage terminals to the server and forwards control commands to the corresponding photovoltaic optimal storage terminals, the server stores the data of the photovoltaic optimal storage terminals and forwards the control commands to the monitoring gateway, and finally the monitoring platform client displays the data of the photovoltaic optimal storage terminals and issues the control commands to the server. The system not only can perform component-level optimization and improve the generating capacity, but also can perform electric energy storage, solve the problems of power limitation and power abandoning, and improve the support capability for a power grid.

Description

Technical Field

[0001] This application relates to the field of photovoltaic technology, and more particularly, to a component-level photovoltaic optimization energy storage control system. Background Art

[0002] With the continuous improvement of China's emphasis on clean energy, photovoltaic power stations, as an important part of building a clean, low-carbon, and efficient modern energy system, are being vigorously developed. However, in this process, photovoltaic power stations are facing several technical problems that need to be solved urgently.

[0003] First of all, the problem of power curtailment and abandonment is one of the key factors restricting the effective utilization of photovoltaic power. Due to reasons such as limited grid acceptance capacity and power demand fluctuations, the generated photovoltaic power sometimes cannot be fully consumed and has to be discarded, resulting in energy waste. Secondly, in order to overcome the above problems and enhance the support capacity for the grid, energy storage technology has become an indispensable part of the photovoltaic system optimization solution. However, there are still many challenges in the application of current energy storage technology, such as high cost investment, safety hazards, and low energy storage efficiency. Thirdly, the operation and maintenance management of photovoltaic power plants also face certain difficulties. The existing management system cannot realize intelligent remote monitoring and maintenance of all components, which makes the daily operation highly dependent on manual operation, not only increasing the operation cost, but also affecting the stability and reliability of the system to a certain extent. In addition, mismatch loss is also a problem that cannot be ignored. Traditional photovoltaic arrays mostly work in the way of connecting multiple components in series and then connecting them to a maximum power point tracking (MPPT) controller. When the components in a certain string have performance differences due to factors such as shadow occlusion, it will trigger the so-called "barrel effect", that is, the power generation efficiency of the entire string is greatly affected by the weakest link. Finally, considering safety factors, especially in case of emergencies such as fires, the series DC high voltage commonly existing in the existing photovoltaic system design brings additional risks to emergency handling. Therefore, it is necessary to introduce a component-level shutdown mechanism to eliminate these potential safety hazards.

[0004] Therefore, how to provide a device that can effectively address the above challenges, thereby further improving the overall performance and economic benefits of photovoltaic power stations, has become one of the research directions of those skilled in the art. Summary of the Invention

[0005] The purpose of this application is to provide a component-level photovoltaic optimization energy storage control system to overcome the existing technical defects, which can not only perform component-level optimization to increase power generation, but also store electrical energy, solve the problem of power curtailment and abandonment, and enhance the support capacity for the grid.

[0006] The purpose of this application is achieved through the following technical solutions:

[0007] In a first aspect, the present application proposes a component-level photovoltaic optimized energy storage control system, which includes a plurality of photovoltaic modules, a plurality of photovoltaic optimized energy storage terminals, a monitoring gateway, a server, and a monitoring platform client connected in sequence;

[0008] The photovoltaic modules are used to convert light energy into electrical energy and transmit it to the photovoltaic optimized energy storage terminals;

[0009] The photovoltaic optimized energy storage terminals are used for energy storage management and perform maximum power point tracking on each photovoltaic module, so that each photovoltaic module is at the maximum power point;

[0010] The monitoring gateway is used to upload the data of the photovoltaic optimized energy storage terminals to the server and forward the control commands to the corresponding photovoltaic optimized energy storage terminals;

[0011] The server is used to store the data of the photovoltaic optimized energy storage terminals and forward the control commands to the monitoring gateway;

[0012] The monitoring platform client supports communication with the photovoltaic optimized energy storage terminals in broadcast, multicast, and unicast modes, and is used to display the data of the photovoltaic optimized energy storage terminals and issue control commands to the server.

[0013] In a possible implementation, the photovoltaic optimized energy storage terminal includes an energy storage controller and an energy storage battery connected to the energy storage controller;

[0014] The energy storage controller is used for charge and discharge management, and responds and cuts off the power output in case of emergency, so that the terminal output voltage drops to a safe level;

[0015] The energy storage battery is used to store and release the electrical energy generated by the photovoltaic modules.

[0016] In a possible implementation, the communication method between the monitoring gateway and the server is one or more of 4G, 5G, Ethernet, CAT1, and WIFI.

[0017] In a possible implementation, the photovoltaic optimized energy storage terminal includes MC4 input terminals and MC4 output terminals. The MC4 input terminals are connected to the photovoltaic modules, and the MC4 output terminals are connected to the inverter or the photovoltaic optimized energy storage terminals.

[0018] In a possible implementation, the communication method between the photovoltaic optimized energy storage terminal and the monitoring gateway is one or more of 5G, WIoTa, Lora, and PLC.

[0019] In a possible implementation, the monitoring gateway supports OTA update.

[0020] In a possible implementation, the photovoltaic optimized energy storage terminal has a temperature monitoring function and an over-temperature automatic protection function, and also supports outputting turn-off commands, charging commands, and discharging commands.

[0021] In a possible implementation, the monitoring gateway corresponds to 1 to 200 inverters.

[0022] In a possible implementation, the monitoring gateway manages 1 to 100,000 energy storage terminals.

[0023] The main solution of the present application and its various further alternative solutions can be freely combined to form multiple solutions, all of which are solutions that can be adopted and claimed in the present application; and in the present application, (each non-conflicting alternative) alternatives and other alternatives can also be freely combined. Those skilled in the art can understand that there are various combinations according to the prior art and common general knowledge after understanding the solution of the present application, all of which are technical solutions to be protected in the present application, and will not be enumerated here.

[0024] The present application discloses a component-level photovoltaic optimization energy storage control system. The photovoltaic modules convert light energy into electrical energy and send it to the photovoltaic energy storage terminal. The photovoltaic energy storage terminal performs energy storage management and performs maximum power point tracking on each photovoltaic module, so that each photovoltaic module is at the maximum power point. The monitoring gateway uploads the data of the photovoltaic energy storage terminal to the server and forwards the control command to the corresponding photovoltaic energy storage terminal. The server stores the data of the photovoltaic energy storage terminal and forwards the control command to the monitoring gateway. Finally, the monitoring platform client displays the data of the photovoltaic energy storage terminal and issues the control command to the server. This system can not only perform component-level optimization to increase power generation, but also store electrical energy, solve the problem of power curtailment and abandonment, and improve the support ability for the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 Shows a schematic diagram of a component-level photovoltaic optimization energy storage control system proposed in an embodiment of the present application.

[0027] Figure 2 Shows a schematic diagram of the logical structure of the photovoltaic energy storage terminal proposed in an embodiment of the present application.

[0028] Figure 3 Shows a schematic diagram of the connection between the photovoltaic energy storage terminal and the photovoltaic module proposed in an embodiment of the present application.

[0029] Figure 4 Shows a schematic diagram of the logic of the series connection of the photovoltaic energy storage terminal strings to the inverter proposed in an embodiment of the present application.

[0030] Figure 5 shows the network communication topology diagram proposed in the embodiments of the present application. Detailed implementation manners

[0031] The following uses specific specific examples to illustrate the implementation manners of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. The present application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0032] Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present application.

[0033] In the prior art, the technical problems faced by photovoltaic power stations are as follows: First, the problem of power curtailment and abandonment. Due to insufficient grid acceptance capacity, power demand fluctuations or other reasons, the phenomenon that photovoltaic power generation cannot be effectively utilized and is forced to be abandoned. Second, it is difficult to configure energy storage. In order to solve the problem of power abandonment in photovoltaic power stations and improve the support ability for grid power supply, photovoltaic energy storage configuration is becoming a trend. However, in actual applications, it still faces problems such as cost, safety, and low efficiency. Third, it is difficult to operate and maintain. Currently, there is still no effective solution for intelligent remote management of all components of photovoltaic power stations, and it highly depends on manual operation and maintenance and repair. Fourth, mismatch loss. Currently, photovoltaic power stations generally use maximum power point tracking (MPPT) after components are connected in series. When there are shadow occlusions or other reasons for mismatch problems in the components within a string, the cask effect will occur, resulting in a reduction in the power generation of all components within the string.

[0034] Therefore, in order to solve the above technical problems, a component-level photovoltaic optimization energy storage control system proposed in the embodiments of the present application aims to achieve refined management and intelligent control of the photovoltaic power generation system by integrating intelligent hardware and software platforms, thereby improving power generation efficiency, solving the problem of power abandonment, enhancing safety, and improving the convenience of operation and maintenance. Next, it will be described in detail.

[0035] Please refer to Figure 1 , Figure 1 shows a schematic diagram of a component-level photovoltaic optimization energy storage control system proposed in the embodiments of the present application. The system includes a plurality of photovoltaic components, a plurality of photovoltaic energy storage optimization terminals, a monitoring gateway, a server, and a monitoring platform client that are electrically connected;

[0036] Photovoltaic module, which is used to convert light energy into electrical energy and transmit it to the photovoltaic energy storage terminal;

[0037] Photovoltaic energy storage terminal, which is used for energy storage management and performs maximum power point tracking on each photovoltaic module, so that each photovoltaic module operates at the maximum power point;

[0038] Monitoring gateway, which is used to upload the data of the photovoltaic energy storage terminal to the server and forward the control command to the corresponding photovoltaic energy storage terminal;

[0039] Server, which is used to store the data of the photovoltaic energy storage terminal and forward the control command to the monitoring gateway;

[0040] The monitoring platform client supports communication with the photovoltaic energy storage terminal in broadcast, multicast and unicast modes, and is used to display the data of the photovoltaic energy storage terminal and send the control command to the server.

[0041] The photovoltaic module converts light energy into electrical energy and is connected to the energy storage terminal through an MC4 connector. Each photovoltaic module is responsible for collecting solar energy and converting it into direct current for subsequent processing.

[0042] Each energy storage terminal can provide maximum power point tracking (MPPT) services for 1-3 photovoltaic modules, ensuring that each connected module operates at its optimal operating point and avoiding affecting the output of the entire system due to poor performance of individual modules. The built-in small energy storage battery (0-3 degrees of electricity) can store excess electricity when the grid restricts power output and release energy during non-power restriction periods, solving the problem of abandoned electricity, and supports multiple wireless communication protocols (such as 5G, Wiota, LoRa, PLC), ensuring stable data transmission with the monitoring gateway. In addition, it also has an over-temperature protection mechanism and the function of automatically cutting off the power supply in case of emergency, ensuring the safety of equipment and personnel, and collecting and uploading key information such as its own temperature and power generation to the superior system in real time.

[0043] The monitoring gateway is responsible for receiving data from up to 100,000 energy storage terminals and sending it to the server; at the same time, it can also receive instructions from the server and accurately convey them to the designated target terminal, and supports multiple networking methods such as 4G / 5G / Ethernet / CAT1 / WiFi to meet the requirements in different environments. It also has the OTA (Over-The-Air) function, which is convenient for later maintenance and technology updates.

[0044] The server collects relevant data such as the operating status and power generation situation transmitted by all Youchu terminals accessing the system, and properly stores it for subsequent analysis. It can also send specific execution instructions to the corresponding monitoring gateway or directly to the Youchu terminal according to the operation requests issued by the monitoring platform client. In addition, it provides necessary API interfaces for the front-end application, namely the monitoring platform client, allowing users to view the latest or historical power generation statistical data and issue operation instructions through this interface.

[0045] Users can view the working conditions of each Youchu terminal and the electricity generated by them in real time through the monitoring platform client, and can also query the performance records over a certain period in the past. Users can actively send specific control commands to any number of target devices, such as actions like starting / stopping the charging process of a certain Youchu terminal. To improve efficiency, the platform supports three different message passing methods, which can be flexibly selected according to actual needs.

[0046] The photovoltaic Youchu terminal includes a Youchu controller and a energy storage battery connected to the Youchu controller;

[0047] The Youchu controller is used for charge and discharge management, and responds and cuts off the power output in case of emergency, reducing the terminal output voltage to a safe level;

[0048] The energy storage battery is used to store and release the electric energy generated by the photovoltaic modules.

[0049] The Youchu controller is responsible for managing and controlling the charging and discharging process of the energy storage battery. Through the built-in algorithm, it can ensure that the battery works under the best conditions, extend the battery life, and improve the efficiency of the entire system. In case of overheating, short circuit or other emergencies, the Youchu controller will quickly respond and cut off the power output, reducing the terminal output voltage to a safe level to protect the safety of equipment and personnel, and collect and upload key information such as its own temperature and power generation in real time to the superior system for remote monitoring and data analysis.

[0050] When the power grid restricts power output, the energy storage battery can store the excess electric energy generated by the photovoltaic modules, solving the problem of "abandoned electricity". During non-power restriction periods, the energy storage battery releases the stored energy for users to use or feedback to the power grid, thus maximizing the utilization of clean energy. The capacity of the energy storage battery is generally between 0 and 3 degrees of electricity, and can be configured according to actual needs to meet the requirements of different application scenarios.

[0051] The communication methods between the monitoring gateway and the server are one or more of 4G, 5G, Ethernet, CAT1, and WIFI. These communication methods can be flexibly selected or combined according to actual needs to meet the performance and cost requirements under different application scenarios.

[0052] Figure 2The figure shows a schematic diagram of the logical structure of the photovoltaic energy storage terminal proposed in the embodiments of the present application. The photovoltaic energy storage terminal is the central part of the entire system, responsible for managing and controlling the energy flow between the photovoltaic system and the energy storage battery. There are two MC4 connectors (In+ and In-) at the input end for receiving the DC power input from the photovoltaic panels, and there are also two MC4 connectors (Out+ and Out-) at the output end for outputting the processed electrical energy to the power grid or load. The solid lines in the figure represent the electrical connections between the various components to ensure the smooth flow of electrical energy within the system. Figure 3 The figure shows a schematic diagram of the connection between the photovoltaic energy storage terminal and the photovoltaic modules proposed in the embodiments of the present application. The photovoltaic energy storage terminals are also connected through MC4.

[0053] The photovoltaic energy storage terminal includes MC4 input terminals and MC4 output terminals. The MC4 input terminals are connected to the photovoltaic modules, and the MC4 output terminals are connected to the inverter or other photovoltaic energy storage terminals.

[0054] The DC power generated by the photovoltaic modules is transmitted to the photovoltaic energy storage terminal through the MC4 input terminals. Each output end of the photovoltaic module is equipped with an MC4 connector, which can be easily inserted into the MC4 input terminals of the energy storage terminal to ensure the safety and reliability of the electrical connection. After the photovoltaic energy storage terminal completes the charge and discharge management and optimization of the energy storage battery, the optimized DC power is transmitted to the inverter through the MC4 output terminals. The inverter then converts the DC power into AC power and feeds it into the power grid or for user use. In a distributed photovoltaic system, multiple photovoltaic energy storage terminals can be interconnected through the MC4 output terminals to form a larger energy storage network, realizing more flexible energy management and scheduling.

[0055] The communication methods between the photovoltaic energy storage terminal and the monitoring gateway are one or more of 5G, WIoTa, Lora, and PLC.

[0056] The monitoring gateway supports OTA updates. OTA (Over-The-Air) update refers to the technology of remotely providing firmware or software updates for devices through a wireless network. This method enables the device to receive the latest function improvements, performance optimizations, and security patches without relying on a physical connection.

[0057] The photovoltaic energy storage terminal has a temperature monitoring function and an over-temperature automatic protection function, and also supports outputting shutdown commands, charging commands, and discharging commands.

[0058] The PV energy storage terminal can monitor the temperature of itself and the energy storage battery in real time and upload the data to the monitoring system. Users can set the temperature warning value. When the temperature exceeds the preset threshold, the system will trigger an alarm or take corresponding protection measures. In the case of detecting an abnormal increase in temperature (such as overheating), the energy storage controller will immediately respond and cut off the power output, reducing the terminal output voltage to a safe level to prevent potential safety hazards such as equipment damage or fire. Some models of PV energy storage terminals may also be equipped with an active cooling system that starts a fan or other cooling devices to lower the temperature when it is too high.

[0059] The PV energy storage terminal supports receiving remote control commands from the server or users through the monitoring gateway. According to requirements or emergencies, an output shutdown command can be remotely sent to turn off the power output of the terminal to ensure safety. The charging command allows users or the system to remotely control the charging process of the energy storage battery to optimize the charging time and efficiency. The discharge command controls the discharge behavior of the energy storage battery through remote instructions to flexibly allocate energy usage.

[0060] The monitoring gateway corresponds to 1 to 200 inverters.

[0061] The monitoring gateway manages 1 to 100,000 energy storage terminals.

[0062] Figure 4 The figure shows the logic schematic diagram of the series connection of PV energy storage terminal strings to the inverter in the embodiment of the present application. Each terminal includes a PV panel and an energy storage unit. The terminals are connected to the inverter through cables. The end of each string is connected to the input of the inverter. The inverter receives direct current from all strings and converts it into alternating current. Figure 5 The figure shows the network communication topology diagram in the embodiment of the present application. The monitoring gateway has strong management capabilities. It can connect 1 to 200 inverters and manage up to 100,000 energy storage terminals, suitable for small-scale household PV systems to large-scale industrial energy storage projects. Through efficient communication technologies and intelligent algorithms, it ensures the stable operation of the system and resource optimization, providing reliable technical support for PV and energy storage projects.

[0063] Compared with the prior art, the embodiment of the present application has the following beneficial effects:

[0064] First, through component-level optimization technology, each PV component can be independently monitored and adjusted to ensure that each component operates in the best working state, thereby maximizing the overall power generation efficiency and significantly increasing the power generation.

[0065] Second, the energy storage terminal can store the excess electric energy and release it when needed, solving the problem of abandoned electricity caused by grid restrictions or demand fluctuations, and helping to balance the grid load and improve the support capacity for the grid, especially during peak electricity consumption periods.

[0066] Third, by conducting real-time monitoring and precise control of each component, operation and maintenance personnel can promptly detect and handle potential problems, reduce downtime, and improve the overall maintenance efficiency and reliability of the system.

[0067] Fourth, the built-in automatic inspection function can regularly evaluate the device status, and promptly issue warnings and take corresponding measures when detecting high temperature or other abnormal conditions, effectively preventing safety hazards such as fires.

[0068] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A module-level photovoltaic optimized energy storage control system, characterized in that: The system includes a plurality of photovoltaic modules, a plurality of photovoltaic storage terminals, a monitoring gateway, a server and a monitoring platform client that are electrically connected; Photovoltaic modules are used to convert light energy into electrical energy and transmit it to photovoltaic storage terminals; Photovoltaic optimal storage terminal is used for energy storage management and maximum power point tracking of each photovoltaic module, so that each photovoltaic module is at the maximum power point; Monitoring gateway, used to upload the data of photovoltaic optimal storage terminal to the server and forward the control command to the corresponding photovoltaic optimal storage terminal; Server, used to store data of photovoltaic optimal storage terminals and forward control commands to the monitoring gateway; The monitoring platform client supports broadcast, multicast and unicast modes to communicate with the photovoltaic optimal storage terminal, which is used to display the data of the photovoltaic optimal storage terminal and send control commands to the server.

2. The component-level photovoltaic optimization energy storage control system according to claim 1, characterized in that: The photovoltaic optimal storage terminal includes an optimal storage controller and an energy storage battery connected to the optimal storage controller; The optimal storage controller is used for charge and discharge management, responding and cutting off the power output in an emergency, so that the terminal output voltage drops to a safe level; Energy storage batteries are used to store and release the electrical energy generated by photovoltaic panels.

3. The component-level photovoltaic optimization energy storage control system according to claim 1, characterized in that: The communication mode between the monitoring gateway and the server is one or more of 4G, 5G, Ethernet, CAT1, and WIFI.

4. The component-level photovoltaic optimization energy storage control system according to claim 1, characterized in that: The photovoltaic optimal storage terminal includes an MC4 input terminal and an MC4 output terminal. The MC4 input terminal is connected to the photovoltaic module, and the MC4 output terminal is connected to the inverter or the photovoltaic optimal storage terminal.

5. The component-level photovoltaic optimized energy storage control system according to claim 1, characterized in that: The communication method between the photovoltaic storage terminal and the monitoring gateway is one or more of 5G, WIoTa, Lora, and PLC.

6. The component-level photovoltaic optimized energy storage control system according to claim 1, characterized in that: The monitoring gateway supports OTA updates.

7. The component-level photovoltaic optimized energy storage control system according to claim 1, characterized in that: The photovoltaic optimal storage terminal has temperature monitoring and automatic over-temperature protection functions, and also supports output shutdown commands, charging commands, and discharging commands.

8. The component-level photovoltaic optimized energy storage control system according to claim 1, characterized in that: The monitoring gateway corresponds to 1 to 200 inverters.

9. The component-level photovoltaic optimized energy storage control system according to claim 1, characterized in that: The monitoring gateway manages 1 to 100,000 optimal storage terminals.

Images