Roof photovoltaic power generation intelligent energy storage system

Abstract

The invention discloses a roof photovoltaic power generation intelligent energy storage system, which belongs to the technical field of power generation intelligent energy storage, and comprises a photovoltaic power generation module, an energy conversion module, an energy storage module, a data acquisition module, an energy management module, a mode intelligent switching module, a load module and a communication module, by integrating the energy conversion module, the energy storage module and the energy management module, the system can utilize solar energy resources more efficiently. Especially through a maximum power point tracking technology and an intelligent charging and discharging strategy, it is ensured that energy output of a photovoltaic panel can be maximized under various weather conditions, the energy is reasonably distributed and used, a system operation mode is automatically adjusted through a mode intelligent switching module according to real-time energy supply and demand conditions, and the energy utilization efficiency is improved. Therefore, the system can maintain the optimal operation state under different conditions, the flexibility of the system is improved, and the adaptability of the system to environmental changes is enhanced.

Description

Technical Field

[0001] The present invention belongs to the technical field of intelligent energy storage for power generation, and specifically refers to a rooftop photovoltaic power generation intelligent energy storage system. Background Art

[0002] With the increasing demand for clean energy and the improvement of environmental protection awareness, solar energy, as a clean and renewable energy source, has received extensive attention. However, traditional rooftop photovoltaic power generation systems have problems such as low energy conversion efficiency, limited energy storage capacity, and insufficient intelligence, making it difficult to meet users' demand for stable power supply;

[0003] However, existing photovoltaic power generation intelligent energy storage systems still have certain defects. Existing photovoltaic power generation intelligent energy storage systems lack maximum power point tracking, resulting in the inability to maximize the energy output of photovoltaic panels under different light conditions. They only rely on basic charge and discharge logic and fail to dynamically adjust strategies according to real-time conditions, leading to low utilization efficiency of energy storage modules. Traditional systems often adopt fixed operating modes and cannot automatically adjust according to real-time energy supply and demand conditions, lacking an intelligent mode switching mechanism. Existing systems may perform poorly in the face of changing environmental conditions, resulting in unstable power supply. Therefore, a rooftop photovoltaic power generation intelligent energy storage system is proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a rooftop photovoltaic power generation intelligent energy storage system to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A rooftop photovoltaic power generation intelligent energy storage system includes a photovoltaic power generation module, an energy conversion module, an energy storage module, a data acquisition module, an energy management module, a mode intelligent switching module, a load module, and a communication module;

[0006] The photovoltaic power generation module is composed of a photovoltaic panel array installed on the roof of a building, which converts solar energy into electrical energy and outputs the electrical energy to the energy conversion module;

[0007] The energy conversion module is used to convert the electrical energy generated by the photovoltaic power generation module;

[0008] The energy storage module is used to store the electrical energy after the energy conversion module;

[0009] The data acquisition module is used to collect data information of the photovoltaic power generation module and send it to the energy management module for processing;

[0010] The energy management module is used to manage and analyze the charge and discharge process of the energy storage module;

[0011] The mode intelligent switching module is used to automatically switch the operation mode of the system according to the analysis results of the energy management module and the current energy supply and demand situation;

[0012] The load module is used to connect electrical equipment and intelligently distribute electric energy according to the real-time demand of the load and the operation status of each module;

[0013] The communication module is used to communicate with external devices to achieve remote monitoring and management.

[0014] Among them, the photovoltaic power generation module is composed of a photovoltaic panel array installed on the roof of a building, which converts solar energy into electric energy and outputs the electric energy to the energy conversion module; according to the roof structure assessment, and according to the pre-designed scheme, the photovoltaic panels are precisely arranged on the roof, and each photovoltaic panel is connected to form a series-parallel combination to optimize the overall voltage and current output, and the photovoltaic panels are connected to the energy conversion module through a special cable.

[0015] Among them, the quantity conversion module is used to convert the electric energy generated by the photovoltaic power generation module; collect the data information of the photovoltaic power generation module and send it to the energy management module for processing; install an inverter in the photovoltaic panel array, integrate the MPPT function in the inverter, and monitor the working status of the photovoltaic cells in real time and dynamically adjust the working point.

[0016] Among them, the energy storage module is used to store the electric energy after the energy conversion module. Before storing the electric energy, the energy storage module is initialized, calibrated by the BMS, and receives a charging instruction. After the energy conversion module converts the direct current generated by the photovoltaic power generation module or the alternating current input from the power grid into the electric energy form stored in the optimal energy storage module, the energy management module sends a charging instruction to the energy storage module according to the operation status of the system and the preset charge and discharge strategy. After receiving the charging instruction, the BMS controls the charging process according to the instruction. The BMS first detects the current voltage, current, temperature and other parameters of the energy storage module to judge whether the charging conditions are met. If the conditions are met, the charging circuit is controlled to start charging, and the energy storage module is charged according to the set charging current. During the charging process, the BMS monitors the parameters of the energy storage module in real time. When the voltage reaches the charging cut-off voltage, the BMS controls the charging circuit to stop charging and completes the electric energy storage operation.

[0017] Among them, the data acquisition module is used to collect the data information of the photovoltaic power generation module and send it to the energy management module for processing; the status data information of the photovoltaic panel is obtained by real-time monitoring through sensors. The data acquisition module periodically collects the data of each sensor according to the set acquisition frequency, packs the collected voltage, current, power, temperature, and light intensity data, and sends the packed data frame to the energy management module through the communication interface.

[0018] Among them, the energy management module is used to manage and analyze the charging and discharging processes of the energy storage module; obtain information from the photovoltaic panel, energy storage system, and load from the data acquisition module, and perform preprocessing to integrate various data from different data sources, formulate charging and discharging strategies according to the current power level of the energy storage module. When the SOC is lower than the set lower limit value, and the photovoltaic power generation is sufficient or the grid electricity price is at a low valley period, start the charging process, and preferentially use photovoltaic power generation to charge the energy storage module. If the photovoltaic power generation is insufficient, draw power from the grid to supplement the charging. When the SOC is higher than the set upper limit value, if the grid load is at a peak and the electricity price is high at this time, the energy storage module can be controlled to discharge to the grid; if there is a large electricity demand from the local load, preferentially use the electric energy of the energy storage module to supply power. Combining the user's electricity consumption habits and historical electricity consumption data, analyze the electricity demand patterns in different time periods. During the charging and discharging processes of the energy storage module, the energy management module continuously and real-time monitors various parameters of the energy storage module and external environment data. According to the real-time monitored data, the energy management module dynamically adjusts the charging and discharging strategies.

[0019] Among them, the mode intelligent switching module is used to automatically switch the operation mode of the system according to the analysis results of the energy management module and the current energy supply and demand situation; real-time monitor various indicators provided by the energy management module, including but not limited to the power generation of the photovoltaic panel, the state of charge of the energy storage system, and the demand of the load. Set specific mode switching rules according to different operating scenarios. When the electricity generated by the photovoltaic is sufficient to meet all load demands and the energy storage system is not full, store the excess power; if the photovoltaic power is insufficient to cover all loads, draw the required power from the energy storage system; if both are insufficient, turn to the grid to obtain additional power.

[0020] Among them, the load module is used to connect electrical equipment and intelligently distribute electric energy according to the real-time demand of the load and the operating states of each module; classify the loads according to importance and urgency, and set the priority order, real-time monitor the actual electricity consumption and change trends of each load, collect relevant data through sensors, and predict the load demand in the next period of time, formulate an electric energy distribution plan, and intelligently distribute electric energy to different loads according to the established rules and prediction results.

[0021] Among them, the communication module is used to communicate with external devices to achieve remote monitoring and management; configure corresponding communication protocols in the communication module according to the communication requirements with external devices. The intelligent control unit real-time collects the operating data of the energy storage system, including the power level, voltage, current, and temperature of the energy storage unit, the working state of the energy conversion and management unit, and the power generation power information of the photovoltaic power generation module, package the data according to the pre-set communication protocol format to form a data frame, and the communication module sends the packaged data frame to the external device.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] 1. By integrating an energy conversion module, an energy storage module, and an energy management module, the system of the present invention can utilize solar energy resources more efficiently. In particular, through the maximum power point tracking technology and intelligent charge and discharge strategies, it ensures that the energy output of the photovoltaic panels can be maximized under various weather conditions and rationally distributes and uses this energy;

[0024] 2. Through the mode intelligent switching module, the present invention automatically adjusts the system operation mode according to the real-time energy supply and demand situation, enabling the system to maintain an optimal operating state under different conditions, which not only improves the flexibility of the system but also enhances its adaptability to environmental changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of a rooftop photovoltaic power generation intelligent energy storage system of the present invention;

[0026] Figure 2 is the operation flow of a rooftop photovoltaic power generation intelligent energy storage system of the present invention Figure 1 ;

[0027] Figure 3 is the operation flow of a rooftop photovoltaic power generation intelligent energy storage system of the present invention Figure 2 ;

[0028] Figure 4 is the operation flow of a rooftop photovoltaic power generation intelligent energy storage system of the present invention Figure 3 . DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment

[0031] Please refer to Figures 1-4 as shown. The present invention provides a technical solution: including a photovoltaic power generation module, an energy conversion module, an energy storage module, a data acquisition module, an energy management module, a mode intelligent switching module, a load module, and a communication module;

[0032] The photovoltaic power generation module is composed of a photovoltaic panel array installed on the roof of a building, which converts solar energy into electrical energy and outputs the electrical energy to the energy conversion module;

[0033] The quantity conversion module is used to convert the electric energy generated by the photovoltaic power generation module;

[0034] The energy storage module is used to store the electric energy after the energy conversion module;

[0035] The data acquisition module is used to collect the data information of the photovoltaic power generation module and send it to the energy management module for processing;

[0036] The energy management module is used to manage and analyze the charge and discharge process of the energy storage module;

[0037] The mode intelligent switching module is used to automatically switch the operation mode of the system according to the analysis result of the energy management module and the current energy supply and demand situation;

[0038] The load module is used to connect electrical equipment and intelligently allocate electric energy according to the real-time demand of the load and the operating status of each module;

[0039] The communication module is used to communicate with external devices to achieve remote monitoring and management.

[0040] Among them, the photovoltaic power generation module is composed of a photovoltaic panel array installed on the roof of a building, which converts solar energy into electric energy and outputs the electric energy to the energy conversion module; according to the roof structure evaluation, the photovoltaic panels are precisely arranged on the roof according to the pre-designed scheme, and each photovoltaic panel is connected to form a series-parallel combination to optimize the overall voltage and current output, and the photovoltaic panels are connected to the energy conversion module through a special cable.

[0041] Among them, the quantity conversion module is used to convert the electric energy generated by the photovoltaic power generation module; collect the data information of the photovoltaic power generation module and send it to the energy management module for processing; install an inverter in the photovoltaic panel array design, integrate the MPPT function in the inverter, monitor the working status of the photovoltaic cells in real time, and dynamically adjust the working point.

[0042] Among them, the energy storage module is used to store the electric energy after the energy conversion module. Before the electric energy storage, the energy storage module is initialized. The energy storage module is calibrated by the BMS. After receiving the charging instruction, the energy conversion module converts the direct current generated by the photovoltaic power generation module or the alternating current input from the power grid into the electric energy form stored in the optimal energy storage module. Then, according to the operating state of the system and the preset charge-discharge strategy, the energy management module sends a charging instruction to the energy storage module. After receiving the charging instruction, the BMS controls the charging process according to the instruction. The BMS first detects parameters such as the current voltage, current, and temperature of the energy storage module to determine whether the charging conditions are met. If the conditions are met, it controls the charging circuit to start charging and charges the energy storage module according to the set charging current. During the charging process, the BMS monitors various parameters of the energy storage module in real time. When the voltage reaches the charging cut-off voltage, the BMS controls the charging circuit to stop charging, completing the electric energy storage operation.

[0043] Among them, the data acquisition module is used to collect the data information of the photovoltaic power generation module and send it to the energy management module for processing; the state data information of the photovoltaic panel is obtained by real-time monitoring through sensors. The data acquisition module periodically collects the data of each sensor according to the set acquisition frequency, packs the collected voltage, current, power, temperature, and light intensity data, and sends the packed data frame to the energy management module through the communication interface.

[0044] Among them, the energy management module is used to manage and analyze the charge-discharge process of the energy storage module; obtain information from the photovoltaic panel, energy storage system, and load from the data acquisition module and perform preprocessing, integrate various data from different data sources, and formulate a charge-discharge strategy according to the current power of the energy storage module. When the SOC is lower than the set lower limit value, and the photovoltaic power generation is sufficient or the grid electricity price is in the low valley period, start the charging process, and preferentially use the photovoltaic power generation to charge the energy storage module. If the photovoltaic power generation is insufficient, take electricity from the grid to supplement the charging. When the SOC is higher than the set upper limit value, if the grid load is at a peak and the electricity price is high at this time, the energy storage module can be controlled to discharge to the grid; if there is a large electricity demand from the local load, preferentially use the electric energy of the energy storage module to supply power. Combining the user's electricity consumption habits and historical electricity consumption data, analyze the electricity demand law in different time periods. During the charge-discharge process of the energy storage module, the energy management module continuously monitors various parameters of the energy storage module and external environment data in real time, and dynamically adjusts the charge-discharge strategy according to the real-time monitored data.

[0045] Among them, the mode intelligent switching module is used to automatically switch the operation mode of the system according to the analysis results of the energy management module and the current energy supply and demand situation; it monitors in real time various indicators provided by the energy management module, including but not limited to the power generation of the photovoltaic panels, the state of charge of the energy storage system, and the demand of the load, sets specific mode switching rules according to different operating scenarios, stores the excess power when the power generated by the photovoltaic is sufficient to meet all load demands and the energy storage system is not full; if the photovoltaic power is insufficient to cover all loads, the required power is drawn from the energy storage system; if both are insufficient, additional power is obtained from the power grid.

[0046] Among them, the load module is used to connect electrical equipment, intelligently allocate electric energy according to the real-time demand of the load and the operating status of each module; classify the loads according to importance and urgency, set the priority order, monitor in real time the actual power consumption and change trend of each load, collect relevant data through sensors, predict the load demand in a future period of time, formulate an electric energy allocation plan, and intelligently allocate electric energy to different loads according to the established rules and prediction results.

[0047] Among them, the communication module is used to communicate with external devices to achieve remote monitoring and management; configure the corresponding communication protocol in the communication module according to the communication requirements with external devices, the intelligent control unit collects in real time the operation data of the energy storage system, including the power, voltage, current, and temperature of the energy storage unit, the working state of the energy conversion and management unit, and the power generation power information of the photovoltaic power generation module, packs the data according to the pre-set communication protocol format to form a data frame, and the communication module sends the packed data frame to the external device.

[0048] Working principle: The photovoltaic power generation module receives solar energy through the photovoltaic panel array installed on the building roof and converts it into electrical energy. The electrical energy is then output to the energy conversion module. The energy conversion module receives the electrical energy from the photovoltaic power generation module and performs necessary conversions. The energy conversion module may be integrated with the maximum power point tracking function to monitor the working state of the photovoltaic cells in real time and dynamically adjust the working point, so as to maximize the energy output. The converted electrical energy is stored in the energy storage module. Before storing the electrical energy, the energy storage module will perform initialization settings and calibration. The energy management module sends charging or discharging instructions to the energy storage module according to the operating state of the system and the preset charge-discharge strategy. The energy storage module controls the charging and discharging processes through the battery management system. The data acquisition module monitors the status data of the photovoltaic panels in real time through sensors. The data is periodically collected and packaged and sent to the energy management module for processing. The energy management module receives the information from the data acquisition module, performs preprocessing and integration, and formulates the charge-discharge strategy according to the current power of the energy storage module and other factors. The energy management module continuously monitors the data of the energy storage module and the external environment, and dynamically adjusts the charge-discharge strategy according to the real-time monitored data. The mode intelligent switching module monitors the various indicators provided by the energy management module in real time, and automatically switches the operating mode of the system according to different operating scenarios and the preset mode switching rules. The load module is connected to the electrical equipment and intelligently distributes electrical energy according to the real-time demand of the load and the operating states of each module. The load module classifies the loads according to the importance and urgency of the loads, and sets the priority order. By predicting the load demand in the next period of time, it formulates the electrical energy distribution plan and intelligently distributes the electrical energy to different loads. The communication module communicates with external devices to achieve remote monitoring and management. The communication module configures the corresponding communication protocol and collects the operating data of the energy storage system in real time. The data is packaged into data frames and sent to external devices.

[0049] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

[0050] The above describes the present invention and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. All in all, if those of ordinary skill in the art are inspired by it and, without departing from the purpose of the present invention, design similar structural manners and embodiments to this technical solution without creative efforts, they should all fall within the protection scope of the present invention.

Claims

1. A rooftop photovoltaic power generation intelligent energy storage system, characterized by: It includes photovoltaic power generation module, energy conversion module, energy storage module, data acquisition module, energy management module, mode intelligent switching module, load module and communication module; The photovoltaic power generation module is composed of a photovoltaic panel array installed on the roof of a building, converting solar energy into electrical energy and outputting the electrical energy to an energy conversion module; The energy conversion module is used to convert the electric energy generated by the photovoltaic power generation module; The energy storage module is used to store the electric energy after the energy conversion module; The data acquisition module is used to collect data information of the photovoltaic power generation module and send it to the energy management module for processing; The energy management module is used to manage and analyze the charging and discharging process of the energy storage module; The mode intelligent switching module is used to automatically switch the operation mode of the system according to the analysis results of the energy management module and the current energy supply and demand conditions; The load module is used to connect to electrical equipment and intelligently distribute electrical energy according to the real-time demand of the load and the operating status of each module; The communication module is used to communicate with external devices to achieve remote monitoring and management.

2. A rooftop photovoltaic power generation intelligent energy storage system according to claim 1, characterized in that: The photovoltaic power generation module is composed of a photovoltaic panel array installed on the roof of a building, which converts solar energy into electrical energy and outputs the electrical energy to the energy conversion module; a structural assessment is performed based on the roof, and photovoltaic panels are accurately arranged on the roof according to a pre-designed plan, and each photovoltaic panel is connected to form a series-parallel combination to optimize the overall voltage and current output, and the photovoltaic panels are connected to the energy conversion module via a dedicated cable.

3. A rooftop photovoltaic power generation intelligent energy storage system according to claim 1, characterized in that: The quantity conversion module is used to convert the electric energy generated by the photovoltaic power generation module; collect the data information of the photovoltaic power generation module and send it to the energy management module for processing; design and install the inverter in the photovoltaic panel array, integrate the MPPT function in the inverter, monitor the working status of the photovoltaic cell in real time, and dynamically adjust the working point.

4. A rooftop photovoltaic power generation intelligent energy storage system according to claim 1, characterized in that: The energy storage module is used to store the electric energy after the energy conversion module. Before storing electric energy, the energy storage module is initialized and set, and the energy storage module is calibrated through the BMS. After receiving the charging instruction, the energy conversion module converts the AC power generated by the photovoltaic power generation module and the input of the power grid into the form of electric energy stored in the optimal energy storage module. The energy management module sends the charging instruction to the energy storage module according to the operating status of the system and the preset charging and discharging strategy. After the energy storage module receives the charging instruction, the BMS controls the charging process according to the instruction. The BMS first detects the current voltage, current, temperature and other parameters of the energy storage module to determine whether the charging conditions are met. If the conditions are met, the charging circuit is controlled to start charging, and the energy storage module is charged according to the set charging current. During the charging process, the BMS monitors the various parameters of the energy storage module in real time. When the voltage reaches the charging cut-off voltage, the BMS controls the charging circuit to stop charging to complete the electric energy storage operation.

5. The rooftop photovoltaic power generation intelligent energy storage system according to claim 1, characterized in that: The data acquisition module is used to collect data information of the photovoltaic power generation module and send it to the energy management module for processing; the status data information of the photovoltaic panel is acquired through real-time monitoring by sensors. The data acquisition module periodically collects data from each sensor according to the set collection frequency, packages the collected voltage, current, power, temperature, and light intensity data, and sends the packaged data frames to the energy management module through the communication interface.

6. A rooftop photovoltaic power generation intelligent energy storage system according to claim 1, characterized in that: The energy management module is used to manage and analyze the charging and discharging process of the energy storage module; obtain information from the photovoltaic panel, energy storage system and load from the data acquisition module, and pre-process it, integrate various types of data from different data sources, and formulate a charging and discharging strategy according to the current power of the energy storage module. When the SOC is lower than the set lower limit, and the photovoltaic power generation is sufficient or the power grid electricity price is at a low period, the charging process is started, and photovoltaic power generation is preferentially used to charge the energy storage module. If the photovoltaic power generation is insufficient, electricity is taken from the grid for supplementary charging. When the SOC is higher than the set upper limit, if the grid load is peak and the electricity price is high at this time, the energy storage module can be controlled to discharge to the grid; if the local load has a large power demand, the energy storage module is preferentially used for power supply. Combined with the user's power consumption habits and historical power consumption data, the power consumption demand patterns in different time periods are analyzed. During the charging and discharging process of the energy storage module, the energy management module continuously monitors various parameters of the energy storage module and external environmental data in real time. According to the real-time monitoring data, the energy management module dynamically adjusts the charging and discharging strategy.

7. A rooftop photovoltaic power generation intelligent energy storage system according to claim 1, characterized in that: The mode intelligent switching module is used to automatically switch the operation mode of the system according to the analysis results of the energy management module and the current energy supply and demand conditions; Real-time monitoring of various indicators provided by the energy management module, including but not limited to the power generation of photovoltaic panels, the charge state of the energy storage system and the load demand, and setting specific mode switching rules according to different operating scenarios. When the amount of electricity generated by photovoltaics is sufficient to meet all load demands and the energy storage system is not full, the excess electricity is stored; if the photovoltaic power is insufficient to cover all loads, the required electricity is drawn from the energy storage system; if both are insufficient, turn to the grid for additional electricity.

8. The rooftop photovoltaic power generation intelligent energy storage system according to claim 1, characterized in that: The load module is used to connect electrical equipment and intelligently distribute electrical energy according to the real-time demand of the load and the operating status of each module; classify the loads according to their importance and urgency, set a priority order, monitor the actual power consumption and change trend of each load in real time, collect relevant data through sensors, and predict the load demand in the future, formulate an energy distribution plan, and intelligently distribute electrical energy to different loads according to established rules and prediction results.

9. A rooftop photovoltaic power generation intelligent energy storage system according to claim 1, characterized in that: The communication module is used to communicate with external devices to achieve remote monitoring and management; according to the needs of communicating with external devices, the corresponding communication protocol is configured in the communication module, and the intelligent control unit collects the operating data of the energy storage system in real time, including the power, voltage, current, temperature of the energy storage unit, the working status of the energy conversion and management unit, and the power generation information of the photovoltaic power generation module, and packages the data according to the pre-set communication protocol format to form a data frame. The communication module sends the packaged data frame to the external device.

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