Photovoltaic power generation energy storage automatic regulation and control information processing system

Abstract

The invention provides a photovoltaic power generation energy storage automatic regulation and control information processing system, and belongs to the technical field of photovoltaic power generation. A photovoltaic power generation array is connected with an energy storage module through an MPPT controller; the controller is also connected with the super-capacitor energy storage module; the input end of the first DC / AC converter is connected with a power transmission bus; the output end of the first DC / AC converter is connected to a power grid; the input end of the second DC / AC converter is connected with the power transmission bus; the output end of the second DC / AC converter is connected to electric equipment; the photovoltaic power generation monitoring terminal is respectively connected with and controls the operation of the MPPT controller, the first DC / DC controller, the second DC / DC controller, the first DC / AC converter and the second DC / AC converter; the photovoltaic power generation monitoring terminal obtains power generation information; and the photovoltaic power generation monitoring terminal performs information interaction with the photovoltaic power generation monitoring server through the photovoltaic information communication gateway. The system can find and process potential faults or abnormal conditions in time, and the stability and safety of the system are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of photovoltaic power generation, and in particular relates to an automatic control information processing system for photovoltaic power generation and energy storage. Background Art

[0002] With the increasing attention paid to renewable energy and the rapid development of photovoltaic power generation technology, photovoltaic power generation systems have gradually become one of the important energy supply methods. However, photovoltaic power generation systems still face some technical challenges in practical applications, such as the instability of solar energy, the imbalance between power supply and demand, and the limitations of energy storage technology. In order to solve these problems, photovoltaic power generation and energy storage automatic control information processing systems came into being.

[0003] The photovoltaic power generation in the existing technology cannot ensure that the photovoltaic power generation array can output electricity at the maximum power under different lighting conditions, that is, to achieve maximum power point tracking. It is impossible to obtain real-time information such as the power generation, energy storage, current and voltage in the photovoltaic power station; resulting in untimely monitoring. If an abnormality occurs in the photovoltaic power generation process, it cannot be handled in time, affecting the stable operation of the system. Summary of the invention

[0004] The present invention provides a photovoltaic power generation and energy storage automatic control information processing system, which makes full use of solar energy resources and improves the energy conversion efficiency of the system. It has rapid response and self-adaptation capabilities, and can automatically adjust system parameters according to environmental conditions and load changes to maintain stable operation of the system.

[0005] The system includes: multiple photovoltaic power stations, photovoltaic information communication gateways and photovoltaic power generation monitoring servers;

[0006] The photovoltaic power station includes: a photovoltaic power generation array, an MPPT controller, an energy storage module, a supercapacitor energy storage module, a first DC / DC controller, a second DC / DC controller, a first DC / AC converter, a second DC / AC converter and a photovoltaic power generation monitoring terminal;

[0007] The photovoltaic power generation array is connected to the input end of the MPPT controller, and the output end of the MPPT controller is connected to the energy storage module through the power transmission bus and the first DC / DC controller;

[0008] The output end of the MPPT controller is connected to the supercapacitor energy storage module through the power transmission bus and the second DC / DC controller;

[0009] The first DC / AC converter input terminal is connected to the power transmission bus; the first DC / AC converter output terminal is connected to the power grid;

[0010] The input end of the second DC / AC converter is connected to the power transmission bus; the output end of the second DC / AC converter is connected to the power consumption device;

[0011] The photovoltaic power generation monitoring terminal is respectively connected to and controls the operation of the MPPT controller, the first DC / DC controller, the second DC / DC controller, the first DC / AC converter and the second DC / AC converter;

[0012] The photovoltaic power generation monitoring terminal is respectively connected to the photovoltaic power generation array, the energy storage module, the supercapacitor energy storage module and the transmission bus to obtain the power generation information, energy storage information, supercapacitor power information of the photovoltaic power generation array and the current and voltage information on the transmission bus;

[0013] The photovoltaic power generation monitoring terminal exchanges information with the photovoltaic power generation monitoring server through the photovoltaic information communication gateway, and controls the photovoltaic power station to generate electricity, supply power and store electricity according to the control instructions issued by the photovoltaic power generation monitoring server.

[0014] Preferably, the photovoltaic power generation monitoring server is configured with a MySQL database;

[0015] The photovoltaic power generation monitoring server configures the IP address of each photovoltaic power generation monitoring terminal;

[0016] Define the transmission format of photovoltaic power generation information, define the information arrangement order and information bits, set the identifiers between information bits, and the frame header and frame tail identifiers.

[0017] Preferably, the photovoltaic power generation monitoring terminal receives the information arrangement order and information bits defined by the photovoltaic power generation monitoring server, and sets identifiers between information bits and frame header identifiers and frame tail identifiers;

[0018] When the photovoltaic power generation monitoring terminal sends photovoltaic power generation information, it configures the frame header identifier and frame tail identifier of the photovoltaic power generation information currently being sent. The frame header identifier is the IP address of the photovoltaic power generation monitoring terminal, and the frame tail identifier is the sending timestamp.

[0019] Preferably, the photovoltaic power generation monitoring terminal uploads the power generation information, energy storage information, super capacitor power information and current and voltage information on the transmission bus of the photovoltaic power generation array to the photovoltaic power generation monitoring server every preset time period;

[0020] Among them, the photovoltaic power generation monitoring terminal configures the uploaded information as a JSON data packet for uploading.

[0021] Preferably, the photovoltaic power generation monitoring server receives the JSON data packet sent by the photovoltaic power generation monitoring terminal through the photovoltaic information communication gateway, and parses out the IP address, sending timestamp, information arrangement order and information bit;

[0022] Determine whether the timestamp is sent within the preset time period, whether the information arrangement order conforms to the preset order, and whether the information position is vacant. If the information uploaded by the photovoltaic power generation monitoring terminal is abnormal, send an abnormal information instruction to the photovoltaic power generation monitoring terminal and re-acquire it.

[0023] Preferably, the photovoltaic information communication gateway is provided with an STM32 master communication chip, a WiFi module, an RS-232 communication module and a ZigBee module;

[0024] The STM32 main control communication chip is connected to the photovoltaic power generation monitoring terminal through the RS-232 communication module or ZigBee module;

[0025] The STM32 main control communication chip is connected to the photovoltaic power generation monitoring server through the WiFi module.

[0026] Preferably, the photovoltaic power generation monitoring server establishes a communication connection with the photovoltaic power generation monitoring terminal through a Socket;

[0027] The photovoltaic power generation monitoring terminal sends a JSON data packet to the photovoltaic power generation monitoring server at a preset time interval;

[0028] The photovoltaic information communication gateway continuously monitors the TCP request of each photovoltaic power generation monitoring terminal. When the TCP server receives a JSON data packet sent by any photovoltaic power generation monitoring terminal, it sends the JSON data packet to the photovoltaic power generation monitoring server;

[0029] The photovoltaic power generation monitoring server parses the received JSON data packet to obtain the corresponding photovoltaic power generation information and timestamp information, and stores it;

[0030] The photovoltaic power generation monitoring server also analyzes and records the timestamp information of the JSON data packet sent and received by each photovoltaic power generation monitoring terminal, and records the timestamp information of the JSON data packet not received and returns it to the corresponding photovoltaic power generation monitoring terminal.

[0031] Preferably, the photovoltaic power generation monitoring server obtains the system's built-in timestamp information through the time function.

[0032] Preferably, the photovoltaic power generation monitoring server obtains the power generation efficiency of the photovoltaic power station based on the following formula;

[0033]

[0034] Among them, V oc is the open circuit voltage of the photovoltaic power station; I scis the short-circuit current of the photovoltaic power station; FF is the filling factor of the photovoltaic power station; S is the radiation area of ​​the photovoltaic power station; E is the radiation intensity per unit area of ​​the photovoltaic power station per unit time.

[0035] Preferably, the photovoltaic power generation monitoring server obtains the remaining capacity state of the energy storage module based on the following formula;

[0036] SOC=Q c / C i

[0037] Q in the formula c Indicates the remaining capacity of the energy storage module, C i Indicates the capacity of the energy storage module if it is discharged at a constant current;

[0038] The photovoltaic power generation monitoring server calculates the supercapacitor charge state based on the following formula;

[0039]

[0040] SOCsc represents the percentage of power in the supercapacitor; Usc represents the current operating voltage of the supercapacitor; Usc_max is the maximum voltage value for maintaining normal operation of the supercapacitor; and Usc_min is the minimum voltage value for maintaining normal operation of the supercapacitor.

[0041] It can be seen from the above technical solutions that the present invention has the following advantages:

[0042] The photovoltaic power generation energy storage automatic control information processing system provided by the present invention can adjust the working point of the photovoltaic power generation array in real time by using the MPPT controller, the DC / DC controller and the first DC / AC converter, ensuring that the maximum electric energy output can be obtained from the photovoltaic array under any lighting conditions, thereby improving the overall power generation efficiency of the photovoltaic system.

[0043] The system is equipped with energy storage modules and supercapacitor energy storage modules, both of which are connected to the transmission bus through different DC / DC controllers to achieve hierarchical energy storage. The energy storage module is suitable for storing large amounts of electrical energy and is used to balance long-term supply and demand differences; while the supercapacitor energy storage module, due to its fast charging and discharging characteristics, can be used to cope with instantaneous power fluctuations or as an emergency backup power supply, enhancing the flexibility and reliability of the system.

[0044] The photovoltaic power generation monitoring terminal in this application can not only monitor the power generation, energy storage, super capacitor power, transmission bus current and voltage of the entire photovoltaic power station, but also exchange information with the photovoltaic power generation monitoring server through the photovoltaic information communication gateway, and receive and execute control instructions from the server. This intelligent management and allocation mechanism enables the system to automatically adjust the power generation, power supply and power storage process according to factors such as grid demand, power equipment demand and energy storage status, so as to achieve efficient use of energy.

[0045] Through real-time monitoring and intelligent control, the system can promptly detect and handle potential faults or abnormal conditions, such as overload, undervoltage, overtemperature, etc., thereby avoiding equipment damage or safety accidents and improving the stability and safety of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0047] Figure 1 This is a schematic diagram of the photovoltaic power generation energy storage automatic control information processing system;

[0048] Figure 2 Schematic diagram of a photovoltaic power station. DETAILED DESCRIPTION

[0049] In the following, various embodiments of the present disclosure will be described more fully. The present disclosure may have various embodiments, and adjustments and changes may be made therein. However, it should be understood that there is no intention to limit the various embodiments of the present disclosure to the specific embodiments disclosed herein, but rather the present disclosure should be understood to cover all adjustments, equivalents and / or alternatives that fall within the spirit and scope of the various embodiments of the present disclosure.

[0050] Hereinafter, the terms "include" or "may include" used in various embodiments of the present disclosure indicate the presence of disclosed functions, operations, or elements, and do not limit the addition of one or more functions, operations, or elements. In addition, as used in various embodiments of the present disclosure, the terms "include", "have", and their cognates are intended only to indicate specific features, numbers, steps, operations, elements, components, or a combination of the foregoing, and should not be understood as first excluding the presence of one or more other features, numbers, steps, operations, elements, components, or a combination of the foregoing or the possibility of adding one or more features, numbers, steps, operations, elements, components, or a combination of the foregoing.

[0051] In various embodiments of the present disclosure, the expression "or" or "at least one of A or / and B" includes any combination or all combinations of the words listed at the same time. For example, the expression "A or B" or "at least one of A or / and B" may include A, may include B, or may include both A and B.

[0052] The expressions (such as "first", "second", etc.) used in the various embodiments of the present disclosure may modify the various constituent elements in the various embodiments, but may not limit the corresponding constituent elements. For example, the above expressions do not limit the order and / or importance of the elements. The above expressions are only used for the purpose of distinguishing one element from other elements. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, without departing from the scope of the various embodiments of the present disclosure, the first element may be referred to as the second element, and similarly, the second element may also be referred to as the first element.

[0053] It should be noted that if it is described that one component element is “connected” to another component element, the first component element may be directly connected to the second component element, and a third component element may be “connected” between the first component element and the second component element. Conversely, when one component element is “directly connected” to another component element, it can be understood that there is no third component element between the first component element and the second component element.

[0054] The term “user” used in various embodiments of the present disclosure may indicate a person using an electronic device or a device using the electronic device.

[0055] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] See also Figure 1 and Figure 2 Shown is a schematic diagram of a photovoltaic power generation and energy storage automatic control information processing system in a specific embodiment. The system includes: multiple photovoltaic power stations, a photovoltaic information communication gateway, and a photovoltaic power generation monitoring server.

[0057] The photovoltaic power station includes: a photovoltaic power generation array, an MPPT controller, an energy storage module, a supercapacitor energy storage module, a first DC / DC controller, a second DC / DC controller, a first DC / AC converter, a second DC / AC converter and a photovoltaic power generation monitoring terminal.

[0058] The photovoltaic power generation array is connected to the input end of the MPPT controller, and the output end of the MPPT controller is connected to the energy storage module through the power transmission bus and the first DC / DC controller.

[0059] The output end of the MPPT controller is connected to the supercapacitor energy storage module through the power transmission bus and the second DC / DC controller.

[0060] The first DC / AC converter input terminal is connected to the power transmission bus; the first DC / AC converter output terminal is connected to the power grid.

[0061] The input end of the second DC / AC converter is connected to the power transmission bus; the output end of the second DC / AC converter is connected to the power-consuming device.

[0062] The photovoltaic power generation monitoring terminal is respectively connected to and controls the operation of the MPPT controller, the first DC / DC controller, the second DC / DC controller, the first DC / AC converter and the second DC / AC converter.

[0063] The photovoltaic power generation monitoring terminal is connected to the photovoltaic power generation array, energy storage module, supercapacitor energy storage module and transmission bus respectively to obtain the power generation information, energy storage information, supercapacitor information of the photovoltaic power generation array and the current and voltage information on the transmission bus.

[0064] The photovoltaic power generation monitoring terminal exchanges information with the photovoltaic power generation monitoring server through the photovoltaic information communication gateway, and controls the photovoltaic power station to generate electricity, supply power and store electricity according to the control instructions issued by the photovoltaic power generation monitoring server.

[0065] In some embodiments, the MPPT controller can be used for real-time monitoring and adjustment, so that the solar panel operates at the maximum power point, thereby making full use of solar energy resources and improving the energy conversion efficiency of the system. It has fast response and adaptive capabilities, and can automatically adjust system parameters according to environmental conditions and load changes to maintain stable operation of the system.

[0066] The energy storage module of this embodiment stores electric energy when the photovoltaic power generation system generates excess power; when the power generation is insufficient or the demand is at a peak, it releases electric energy to meet the load demand. Through charge and discharge control, it participates in the frequency modulation process of the power system and improves the characteristics of the power grid. It can regulate the peak-to-valley difference of the power system, increase the load rate, and improve the asset utilization rate of the power system.

[0067] Supercapacitor energy storage modules can complete the charging and discharging process in a very short time, providing instantaneous high power output. The number of charge and discharge cycles far exceeds that of traditional batteries, making them suitable for frequent charge and discharge applications. They can operate in a wide temperature range and are suitable for applications in extreme environments.

[0068] The DC / DC controller of this embodiment converts the DC power output by the photovoltaic cell into DC power of the required voltage level to meet the needs of the electrical equipment. It has the characteristics of high efficiency and low energy consumption, and can achieve stable operation of the system. It has overcurrent, overvoltage, undervoltage and other protection functions to ensure the safety of electrical equipment and photovoltaic power generation systems.

[0069] DC / AC converters can convert direct current generated by solar panels into alternating current to meet the power needs of households, industries, and businesses. Through intelligent control systems, photovoltaic power generation systems can be monitored and controlled to optimize energy utilization.

[0070] In an exemplary embodiment, the photovoltaic power generation monitoring server obtains the power generation efficiency of the photovoltaic power station based on the following formula;

[0071] Among them, V oc is the open circuit voltage of the photovoltaic power station; I sc is the short-circuit current of the photovoltaic power station; FF is the filling factor of the photovoltaic power station; S is the radiation area of ​​the photovoltaic power station; E is the radiation intensity per unit area of ​​the photovoltaic power station per unit time.

[0072] The energy storage module uses lithium-ion batteries, nickel-metal hydride batteries, or nickel-cadmium batteries; the photovoltaic power generation monitoring server obtains the remaining capacity status of the energy storage module based on the following formula;

[0073] SOC=Q c / C i

[0074] Q in the formula c Indicates the remaining capacity of the energy storage module, C i Indicates the capacity of the energy storage module when it is discharged at a constant current.

[0075] The photovoltaic power generation monitoring server calculates the supercapacitor charge state based on the following formula;

[0076]

[0077] SOCsc represents the percentage of power in the supercapacitor; Usc represents the current operating voltage of the supercapacitor; Usc_max is the maximum voltage value for maintaining normal operation of the supercapacitor; and Usc_min is the minimum voltage value for maintaining normal operation of the supercapacitor.

[0078] Photovoltaic power generation monitoring server can manage energy storage modules and supercapacitor energy storage modules. This includes: single cell voltage balance, battery pack protection, working status data collection, battery failure maintenance, etc. It can also manage battery voltage balancing function, battery pack protection function, battery monitoring, heat dissipation design, fault diagnosis and fault tolerance, battery online capacity evaluation and other functions.

[0079] In some embodiments, the photovoltaic information communication gateway is provided with an STM32 main control communication chip, a WiFi module, an RS-232 communication module and a ZigBee module; the STM32 main control communication chip is connected to the photovoltaic power generation monitoring terminal through the RS-232 communication module or the ZigBee module; the STM32 main control communication chip is connected to the photovoltaic power generation monitoring server through the WiFi module.

[0080] In some embodiments, the photovoltaic power generation monitoring server is configured with a MySQL database; the photovoltaic power generation monitoring server is configured with the IP address of each photovoltaic power generation monitoring terminal; the sending format of photovoltaic power generation information is defined, and the information arrangement order and information bits are defined, and identifiers between information bits and frame header identifiers and frame tail identifiers are set.

[0081] For example, the information arrangement order can be set based on the order of power generation information, energy storage information, super capacitor information, and current and voltage information on the transmission bus, and a separator can be set between each piece of information, such as a horizontal line or a special character as a separator, to facilitate automatic recognition by the system. The frame header identifier and the frame tail identifier can be set at the corresponding identifier.

[0082] The photovoltaic power generation monitoring terminal of this embodiment receives the information arrangement order and information bits defined by the photovoltaic power generation monitoring server, sets the identifier between the information bits and the frame header identifier and the frame tail identifier; when sending photovoltaic power generation information, the photovoltaic power generation monitoring terminal configures the frame header identifier and the frame tail identifier of the photovoltaic power generation information currently being sent, the frame header identifier is the IP address of the photovoltaic power generation monitoring terminal, and the frame tail identifier is the sending timestamp.

[0083] According to an embodiment of the present application, the photovoltaic power generation monitoring terminal uploads the power generation information, energy storage information, supercapacitor power information and current and voltage information on the transmission bus of the photovoltaic power generation array to the photovoltaic power generation monitoring server every preset time period; wherein, the photovoltaic power generation monitoring terminal configures the uploaded information as a JSON data packet for uploading.

[0084] The photovoltaic power generation monitoring server receives the JSON data packet sent by the photovoltaic power generation monitoring terminal through the photovoltaic information communication gateway, and parses the IP address, sending timestamp, information arrangement order and information position; determines whether the timestamp is sent within the preset time period, whether the information arrangement order conforms to the preset order, and whether the information position is vacant. If the information uploaded by the photovoltaic power generation monitoring terminal is abnormal, an abnormal information instruction is sent to the photovoltaic power generation monitoring terminal and it is retrieved again.

[0085] In some embodiments, the photovoltaic power generation monitoring server establishes a communication connection with the photovoltaic power generation monitoring terminal through a Socket; the photovoltaic power generation monitoring terminal sends a JSON data packet to the photovoltaic power generation monitoring server at a preset time interval; the photovoltaic information communication gateway continuously monitors the TCP request of each photovoltaic power generation monitoring terminal, and when the TCP server receives the JSON data packet sent by any photovoltaic power generation monitoring terminal, it sends the JSON data packet to the photovoltaic power generation monitoring server.

[0086] The photovoltaic power generation monitoring server parses the received JSON data packet to obtain the corresponding photovoltaic power generation information and timestamp information, and stores it; the photovoltaic power generation monitoring server also analyzes and records the timestamp information of the JSON data packet sent and received by each photovoltaic power generation monitoring terminal, and records the timestamp information of the JSON data packet that is not received and returns it to the corresponding photovoltaic power generation monitoring terminal. The photovoltaic power generation monitoring server obtains the system's built-in timestamp information through the time function.

[0087] For the photovoltaic power generation monitoring terminal of the present embodiment, it can be a desktop computer, a workbench, a personal digital assistant, and other suitable computers. The photovoltaic power generation monitoring terminal can also represent various forms of mobile devices, such as personal digital processing and other similar computing devices. The components shown herein, their connections and relationships, and their functions are only examples and are not intended to limit the implementation of the embodiments of the present application described and / or required herein.

[0088] The photovoltaic power generation monitoring terminal may include a processor, an external interface, a memory, a universal serial bus interface, a wireless communication module, an audio module, a mouse and keyboard, a camera, a display screen, etc.

[0089] It is to be understood that the structure illustrated in the embodiment of the present application does not constitute a specific limitation on the photovoltaic power generation monitoring terminal. In other embodiments of the present application, the photovoltaic power generation monitoring terminal may include more or fewer components than shown in the figure, or combine certain components, or split certain components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0090] The processor may include one or more processing units, for example, the processor may include a central processing unit (CPU), an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a memory, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU), etc. Different processing units may be independent devices or integrated into one or more processors.

[0091] The processor can be the nerve center and command center of the electronic device. The controller can generate an operation control signal according to the instruction operation code and timing signal to complete the control of fetching and executing instructions.

[0092] The wireless communication module can provide wireless communication solutions for electronic devices, including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), Bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), infrared technology (IR), etc.

[0093] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0094] In the several embodiments provided in the present application, 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 only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, or it can be an electrical, mechanical or other form of connection.

[0095] In addition, the described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present invention. However, those skilled in the art will appreciate that the technical solution of the present invention can be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be adopted. In other cases, known methods, devices, implementations or operations are not shown or described in detail to avoid blurring various aspects of the present invention.

[0096] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one 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 present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A photovoltaic power generation energy storage automatic control information processing system, characterized in that: include: Multiple photovoltaic power stations, photovoltaic information communication gateways, and photovoltaic power generation monitoring servers; The photovoltaic power station includes: a photovoltaic power generation array, an MPPT controller, an energy storage module, a supercapacitor energy storage module, a first DC / DC controller, a second DC / DC controller, a first DC / AC converter, a second DC / AC converter and a photovoltaic power generation monitoring terminal; The photovoltaic power generation array is connected to the input end of the MPPT controller, and the output end of the MPPT controller is connected to the energy storage module through the power transmission bus and the first DC / DC controller; The output end of the MPPT controller is connected to the supercapacitor energy storage module through the power transmission bus and the second DC / DC controller; The first DC / AC converter input terminal is connected to the power transmission bus; the first DC / AC converter output terminal is connected to the power grid; The input end of the second DC / AC converter is connected to the power transmission bus; the output end of the second DC / AC converter is connected to the power consumption device; The photovoltaic power generation monitoring terminal is respectively connected to and controls the operation of the MPPT controller, the first DC / DC controller, the second DC / DC controller, the first DC / AC converter and the second DC / AC converter; The photovoltaic power generation monitoring terminal is respectively connected to the photovoltaic power generation array, the energy storage module, the supercapacitor energy storage module and the transmission bus to obtain the power generation information, energy storage information, supercapacitor power information of the photovoltaic power generation array and the current and voltage information on the transmission bus; The photovoltaic power generation monitoring terminal exchanges information with the photovoltaic power generation monitoring server through the photovoltaic information communication gateway, and controls the photovoltaic power station to generate electricity, supply power and store electricity according to the control instructions issued by the photovoltaic power generation monitoring server.

2. The photovoltaic power generation energy storage automatic control information processing system according to claim 1 is characterized in that: The photovoltaic power generation monitoring server is configured with a MySQL database; The photovoltaic power generation monitoring server configures the IP address of each photovoltaic power generation monitoring terminal; Define the transmission format of photovoltaic power generation information, define the information arrangement order and information bits, set the identifiers between information bits, and the frame header identifier and frame tail identifier.

3. The photovoltaic power generation energy storage automatic control information processing system according to claim 2 is characterized in that: The photovoltaic power generation monitoring terminal receives the information arrangement order and information bits defined by the photovoltaic power generation monitoring server, and sets identifiers between information bits and frame header identifiers and frame tail identifiers; When the photovoltaic power generation monitoring terminal sends photovoltaic power generation information, it configures the frame header identifier and frame tail identifier of the photovoltaic power generation information currently being sent. The frame header identifier is the IP address of the photovoltaic power generation monitoring terminal, and the frame tail identifier is the sending timestamp.

4. The photovoltaic power generation energy storage automatic control information processing system according to claim 1 or 2, characterized in that: The photovoltaic power generation monitoring terminal uploads the power generation information, energy storage information, super capacitor information and current and voltage information on the transmission bus of the photovoltaic power generation array to the photovoltaic power generation monitoring server at each preset time; Among them, the photovoltaic power generation monitoring terminal configures the uploaded information as a JSON data packet for uploading.

5. The photovoltaic power generation energy storage automatic control information processing system according to claim 4 is characterized in that: The photovoltaic power generation monitoring server receives the JSON data packet sent by the photovoltaic power generation monitoring terminal through the photovoltaic information communication gateway, and parses out the IP address, sending timestamp, information arrangement order and information position; Determine whether the timestamp is sent within the preset time period, whether the information arrangement order conforms to the preset order, and whether the information position is vacant. If the information uploaded by the photovoltaic power generation monitoring terminal is abnormal, send an abnormal information instruction to the photovoltaic power generation monitoring terminal and re-acquire it.

6. The photovoltaic power generation energy storage automatic control information processing system according to claim 1 or 2, characterized in that: The photovoltaic information communication gateway is equipped with an STM32 main control communication chip, a WiFi module, an RS-232 communication module, and a ZigBee module; The STM32 main control communication chip is connected to the photovoltaic power generation monitoring terminal through the RS-232 communication module or ZigBee module; The STM32 main control communication chip is connected to the photovoltaic power generation monitoring server through the WiFi module.

7. The photovoltaic power generation energy storage automatic control information processing system according to claim 1 or 2, characterized in that: The photovoltaic power generation monitoring server establishes a communication connection with the photovoltaic power generation monitoring terminal through Socket; The photovoltaic power generation monitoring terminal sends a JSON data packet to the photovoltaic power generation monitoring server at a preset time interval; The photovoltaic information communication gateway continuously monitors the TCP request of each photovoltaic power generation monitoring terminal. When the TCP server receives a JSON data packet sent by any photovoltaic power generation monitoring terminal, it sends the JSON data packet to the photovoltaic power generation monitoring server; The photovoltaic power generation monitoring server parses the received JSON data packet to obtain the corresponding photovoltaic power generation information and timestamp information, and stores it; The photovoltaic power generation monitoring server also analyzes and records the timestamp information of the JSON data packet sent and received by each photovoltaic power generation monitoring terminal, and records the timestamp information of the JSON data packet not received and returns it to the corresponding photovoltaic power generation monitoring terminal.

8. The photovoltaic power generation energy storage automatic control information processing system according to claim 7 is characterized in that: The photovoltaic power generation monitoring server obtains the system's built-in timestamp information through the time function.

9. The photovoltaic power generation energy storage automatic control information processing system according to claim 1 or 2, characterized in that: The photovoltaic power generation monitoring server obtains the power generation efficiency of the photovoltaic power station based on the following formula; Among them, V oc is the open circuit voltage of the photovoltaic power station; I sc is the short-circuit current of the photovoltaic power station; FF is the filling factor of the photovoltaic power station; S is the radiation area of ​​the photovoltaic power station; E is the radiation intensity per unit area of ​​the photovoltaic power station per unit time.

10. The photovoltaic power generation energy storage automatic control information processing system according to claim 1 or 2, characterized in that: The photovoltaic power generation monitoring server obtains the remaining capacity status of the energy storage module based on the following formula; SOC=Q c / C i Q in the formula c Indicates the remaining capacity of the energy storage module, C i Indicates the capacity of the energy storage module if it is discharged at a constant current; The photovoltaic power generation monitoring server calculates the supercapacitor charge state based on the following formula; SOCsc represents the percentage of the supercapacitor's charge; Usc represents the current supercapacitor's operating voltage; Usc_max is the maximum voltage value for keeping the supercapacitor working normally; Usc_min is the minimum voltage value for keeping the supercapacitor working normally.

Images