Independent wind and light storage combined control system

Abstract

The invention discloses an independent wind and light storage combined control system, which comprises a core control module, a wind power generation module, a photovoltaic power generation module, an energy storage module, an ADC (Analog to Digital Converter) acquisition module and a display module, the wind power generation module and the photovoltaic power generation module respectively adopt a wind power generator and a photovoltaic panel to convert wind and light resources into electric energy to be supplied to the energy storage module, so that the endurance of the device is realized; the energy storage module comprises a storage battery and a standby battery, the storage battery supplies power to the main control module and the load, two voltage thresholds are set for the storage battery, and when wind and light resources are too few and the electric quantity of the storage battery is within the set voltage threshold interval, the system can be automatically switched to the standby battery for endurance of the device and the load. The system is reasonable in design, stable in work, good in performance, fast in data detection, simple in calculation, stable in output and capable of being controlled in real time, the output of each power supply can be adjusted according to weather conditions and the state of the storage battery, and a standby power supply can be switched to be used by a load.

Description

Technical Field

[0001] The present invention relates to the technical field of wind-solar-energy storage, and in particular to an independent wind-solar-energy storage combined control system. Background Art

[0002] With the emergence of various environmental problems such as global warming and environmental pollution, countries around the world are looking for renewable clean energy to replace traditional energy. Compared with traditional energy, the reserves of wind and solar energy are very abundant. A series of renewable energy sources such as wind and light energy will definitely become the core of the main energy structure in the future. Wind power and photovoltaic power generation are unstable distributed new energy power sources. Their power output is time-varying, random and uncertain, which makes it difficult to connect to the grid and optimize the scheduling in the power system. Therefore, it is necessary to implement joint control of wind power and photovoltaic power generation.

[0003] The independent wind, solar and storage jointly controlled power generation system is a brand-new technical system, so there will be many technical problems, such as how to predict the power generated by wind power generation and solar power generation, how to carry out multi-energy distribution of the combined power generation system, the intelligent control system of independent wind, solar and storage, reactive power compensation of independent wind, solar and storage systems, etc. There are many technical problems that need to be solved.

[0004] The disclosure of the above background technology content is only used to assist in understanding the concept and technical solution of the present invention. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this patent application, the above background technology should not be used to evaluate the novelty and creativity of the present application. Summary of the invention

[0005] The purpose of the present invention is to propose an independent wind, solar and storage combined control system to solve the technical problems existing in the above-mentioned prior art, such as how to predict the power generated by wind power generation and solar power generation, how to distribute the combined power generation into a system with multiple energies, how to make the independent wind, solar and storage control system more intelligent, and how to perform reactive power compensation for the independent wind, solar and storage system.

[0006] To this end, the present invention proposes an independent wind-solar-storage joint control system.

[0007] Preferably, the present invention may also have the following technical features:

[0008] An independent wind-solar-storage combined control system comprises a core control module, a wind power generation module, a photovoltaic power generation module, an energy storage module, an ADC acquisition module and a display module; the wind power generation module and the photovoltaic power generation module respectively use wind turbines and photovoltaic panels to convert wind and solar resources into electrical energy to supply the energy storage module to achieve the endurance of the device; the energy storage module comprises a storage battery and a backup battery, the storage battery supplies power to a main control module and a load, two voltage thresholds are set for the storage battery, when the wind and solar resources are too small and the power of the storage battery is within the set voltage threshold range, the system will automatically switch to the backup battery to supply the device and the load endurance.

[0009] Preferably, the photovoltaic power generation module comprises a photovoltaic panel and a boost module, and the electric energy generated by sunlight passing through the photovoltaic panel is supplied to the energy storage module through the boost module.

[0010] Preferably, the photovoltaic panel is composed of a plurality of photovoltaic cells, and the photovoltaic panel is arranged facing south.

[0011] Preferably, the photovoltaic cell panel is one of monocrystalline silicon, polycrystalline silicon and amorphous silicon.

[0012] Preferably, the wind power generation module comprises blades, a wind turbine and a boost module.

[0013] Preferably, the wind turbine is a variable pitch wind turbine, the pitch angle of which can be changed with the direction of wind force, thereby achieving the effect of adjusting the output power of the wind turbine.

[0014] Preferably, the ADC acquisition module is an ADC0832 module, which can collect the electrical signals transmitted by the wind power generation module, photovoltaic power generation module and energy storage module, and then convert them into digital signals and transmit them to the core control module. The core control module can make corresponding processing and judgment based on these data.

[0015] Preferably, the basic working process of the ADC acquisition module includes sampling, holding, quantization and encoding.

[0016] Preferably, the display module is an LCD1602 display system module, including a liquid crystal display screen and a driving chip.

[0017] Preferably, the core control module includes a single chip microcomputer, and the single chip microcomputer is STC89C52.

[0018] The beneficial effects of the present invention compared with the prior art include:

[0019] (1) In terms of economy, traditional thermal power generation needs to burn a large amount of garbage or coal every day, causing serious environmental pollution, and requires a lot of costs for power generation and maintenance. The materials used in the present invention are low-cost, simple to maintain and have a long service life. There is no fuel consumption, and all the wind and light energy that exist naturally in nature are used. Therefore, the system of the present invention has a low power generation cost and relatively high economic benefits. In addition, the design is suitable for remote areas and mountainous areas. While generating electricity, the related technology will also drive the development of local manufacturing and service industries, and will also provide a considerable number of jobs and employment opportunities, promoting economic growth. If the technology is widely developed, it will surely promote the development of global new energy business, drive the development of related enterprises, and generate more economic benefits.

[0020] (2) In terms of sustainable development, the utilization rate of wind and solar resources in existing new energy power stations is not very high, and there are still many phenomena of wind and solar abandonment. The present invention is aimed at studying the joint power generation strategy between wind power generation, photovoltaic power generation and energy storage system. The system design proposes a better strategy between wind power and photovoltaic power generation and energy storage system, which can increase the utilization rate of wind energy and solar energy.

[0021] (3) In terms of safety impact, the present invention can manually set the maximum battery voltage and can set upper and lower thresholds, so that the system can work in a stable environment. The system adds a function that can switch to a backup power supply when the system operating voltage is insufficient, which can make the system work more stably and can continuously and stably provide voltage to the load.

[0022] (4) In terms of environmental impact, the system has low energy consumption and focuses on the development of wind and solar energy. Wind and solar energy are the two major natural clean energy sources currently used by humans in nature. The development of these two resources is a relatively important measure to solve the energy crisis and the global greenhouse effect. The system optimizes the structure and improves the power generation efficiency and the quality of electric energy. In addition, due to the small and independent characteristics of the system, it can also be used in some places where it is not convenient to build large power stations. The control strategy of the present invention between the wind energy system, the photovoltaic system and the energy storage system not only achieves efficient utilization of wind and solar energy under different weather conditions, but also ensures the stable output of the system.

[0023] (5) In terms of society, the device is simple in design and very convenient to use. Moreover, the new energy power generation device is also widely used and can be applied to various occasions for power generation. The design can be used for energy supply in many places. In many remote areas where it is not suitable to build traditional power stations, the design can be used for daily power supply and power generation. In addition, the device is small in size and can provide power for the daily life of a single family or be used as a backup energy source. It can improve people's living and production conditions and improve the level of social development. The present invention is a new energy power generation device, which can also improve people's awareness of new energy and environmental protection, enhance everyone's environmental awareness, and jointly create a green society.

[0024] (6) In terms of culture, the present invention adopts renewable energy for power generation. Nowadays, with the improvement of industrial level and the increasing urbanization, people are getting further and further away from nature. The present invention can work anywhere and can enter thousands of households, allowing people to feel the greatness of nature and enable humans to get closer to nature and live in harmony with nature. The system utilizes the combination of photovoltaic power generation and wind power generation technology to improve the efficiency and reliability of energy utilization and provide people with a green and environmentally friendly energy solution. The realization of this system reflects human’s understanding of the laws of nature and realizes scientific and technological innovation and promotion through nature, which is conducive to cultivating people’s understanding of new energy and environmental protection, cultivating green travel consumption, and promoting the construction of a civilized society. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the interior of the pn junction of the photovoltaic cell of the present invention.

[0026] Figure 2 It is a schematic diagram of the operation mode of the wind-solar-storage complementary power generation system of the present invention.

[0027] Figure 3 This is the basic principle of the wind-solar power generation system of the present invention.

[0028] Figure 4 This is the structure diagram of the independent wind-solar-storage combined control system of the present invention.

[0029] Figure 5 It is the STC89C52 pin diagram of the present invention.

[0030] Figure 6 It is the minimum control circuit diagram of the single chip microcomputer of the present invention.

[0031] Figure 7 It is the crystal oscillator circuit diagram of the present invention.

[0032] Figure 8 It is a reset circuit diagram of the present invention.

[0033] Fig. 9 It is a principle diagram of the wind-solar-storage power generation device of the present invention.

[0034] Fig.10 It is the ADC acquisition module of the present invention.

[0035] Fig.11 It is the schematic diagram of the LCD1602 display module of the present invention.

[0036] Fig.12 It is the main program flow chart of the present invention.

[0037] Fig.13 It is a prototype display diagram of the present invention.

[0038] Fig.14 It is a startup status display diagram of the system of the present invention.

[0039] Fig.15 This is a diagram showing the working status of the wind-solar system of the present invention.

[0040] Fig.16 It is a display diagram of the battery voltage setting state of the present invention.

[0041] Fig.17 It is a diagram showing the threshold voltage setting state of the present invention. DETAILED DESCRIPTION

[0042] The present invention will be further described in detail below in conjunction with specific implementations and with reference to the accompanying drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope of the present invention and its application.

[0043] Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein like reference numerals refer to like parts unless otherwise specifically stated.

[0044] An independent wind-solar-storage combined control system comprises a core control module, a wind power generation module, a photovoltaic power generation module, an energy storage module, an ADC acquisition module and a display module; the wind power generation module and the photovoltaic power generation module respectively use wind turbines and photovoltaic panels to convert wind and solar resources into electrical energy to supply the energy storage module to achieve the endurance of the device; the energy storage module comprises a battery and a backup battery, the battery is used to power a main control module and a load, two voltage thresholds are set for the battery, when the wind and solar resources are too few and the battery power is within the set voltage threshold range, the system will automatically switch to the backup battery to supply the device and the load endurance, the system has a reasonable design, stable operation, good performance, fast data detection, simple calculation, smooth output, real-time control, and can adjust the output of each power supply according to weather conditions and the state of the battery, and can switch the backup power supply for the load. The system is introduced in detail below.

[0045] 1Main system composition

[0046] 1.1 Photovoltaic system

[0047] Semiconductor materials have a photovoltaic effect, so they can convert solar energy in nature into the electrical energy needed by the system.

[0048] The wind power generation system in the independent wind-solar-storage joint control system is mainly composed of photovoltaic arrays, energy storage combinations, inverters, loads, etc. The light energy radiation in nature first passes through the photovoltaic array to convert the light energy into the electrical energy required by the system, and then is converted by the converter in the system to supply the load. At the same time, the excess electrical energy can also be stored in the energy storage system in the independent wind-solar-storage joint control system.

[0049] In the process of making solar panels, trivalent boron atoms are first added to silicon crystals, which constitute the p-type silicon wafer in the photovoltaic cell. After the p-type silicon wafer is formed, phosphorus atoms are added to the surface of the silicon. After the above operation, a thicker n-type silicon wafer can be obtained. Because there are more holes in the p-type silicon wafer than the n-type in the photovoltaic cell, and there are relatively more electrons inside the n-type silicon wafer, a special part with a potential difference can be formed inside the silicon wafer. It is this potential difference that generates current. This special part is the pn junction we are familiar with.

[0050] When the silicon wafer is away from light, the movement of the electrons inside will change accordingly, and the original movement trajectory will change from the n-type area to the p-type area, so that current can be generated between them; the n-type part has a positive charge due to the loss of electrons, and the p-type part has a negative charge due to the gain of electrons, so an electric field can be formed, and its direction is from the n-type area to the p-type area. This process allows the electric field to continue to grow, thereby achieving the purpose of preventing electrons from diffusing and reaching equilibrium, such as Figure 1 shown.

[0051] When light shines on the silicon wafer in the solar panel, it can be absorbed by the bound electrons on it, thus breaking free from the constraints of the atomic nucleus at the beginning, and being excited and becoming free-moving photoelectrons inside. Under the action of the electric field, the photoelectrons in the p-type part will transfer to the n-type part after passing through the pn junction. In this process, the movement of charges can make the potential of the p-type part higher than that of the n-type part, generating a voltage between the two electrodes.

[0052] When the photovoltaic panel is exposed to sunlight, the surface layer of the photovoltaic panel can absorb light, and then the photons with energy can be excited to become electrons in the covalent bond, forming an electron-hole pair. Because the charge in the space will produce an electric field, the electrons and holes will be separated, and then their combination can be organized. Then the electrons will move to the n-type part because this part has a positive charge, and on the contrary, the holes will move in the direction of the negative charge. The charge separation effect will occur between the p-type part and the n-type part, so a voltage can be formed between these areas. At this time, an open circuit voltage of 0.5 to 0.6 will be obtained by detecting between the two electrodes on the silicon wafer. Because the number of electron-hole pairs formed on the interface layer under the effect of light energy is increasing, a gradually increasing current will be generated. Similarly, because the light obtained on the silicon wafer is increasing, the area of ​​the interface layer of the silicon wafer, that is, the photovoltaic cell, is also increasing, so the current inside the photovoltaic cell is also gradually increasing.

[0053] 1.2 Wind power generation system

[0054] 1.2.1 Wind turbine model

[0055] Horizontal-axis wind turbines are divided into fixed-pitch wind turbines and variable-pitch wind turbines. The connection between the hub and the blades of a fixed-pitch wind turbine is fixed, and this type of machine cannot flexibly adjust the pitch angle according to the direction and size of the wind speed; the pitch angle of a variable-pitch wind turbine can be changed with the direction of the wind, which can achieve the effect of adjusting the output power of the wind turbine.

[0056] 1.2.2 Operational characteristics of wind turbines

[0057] The magnitude of wind energy is determined by the magnitude of air pressure in various parts of the atmosphere. Since the wind speed in nature is uncertain, and the magnitude and direction are constantly changing, the kinetic energy E of the flowing air can be obtained through the theory of aerodynamics and fluid mechanics and can be expressed by formula (1.1):

[0058]

[0059] In formula (1.1), m is the air mass; v is the velocity of the flowing air, i.e. the wind speed.

[0060] The wind speed is represented by ρ. In a certain specified unit time, S is the cross-sectional area of ​​the atmosphere, so the wind energy in this state is as follows (1.2):

[0061]

[0062] The ultimate goal of wind power generation is to successfully convert wind energy into energy. During this period, multiple parts inside the wind turbine need to cooperate with each other. First, the wind energy captured by the blades in nature is converted into kinetic energy, and then the energy is transmitted to the mechanical bearings through the transmission device to drive the generator to generate electricity. This is a complete wind power generation process.

[0063] In fact, the hub of the wind wheel does not really exist, and the number of wind wheel blades is not just a few as usually believed, but infinite, so the wind can pass through the turbine part very smoothly and efficiently, and there is almost no resistance when the gas passes through the turbine; and assuming that the air distribution on the swept surface of the wind wheel is very even, and there is no situation where the density is different in different places, and the airflow before and after the wind wheel should be axial. Based on the relevant content in aerodynamics, it can be inferred that when the wind flows through the wind wheel, the maximum power that the wind wheel can obtain is formula (1.3).

[0064]

[0065] The wind energy utilization coefficient is defined as the ratio of the maximum wind energy that the rotor can obtain to the total wind energy flowing through the rotor. This ratio is the theoretical maximum efficiency of the wind turbine and the Betz limit value, see formula (1.4):

[0066]

[0067] Because of the interference of various factors in the environment, the above formula is a limit value, that is, the wind turbine cannot capture all the energy of natural wind.

[0068] Wind energy is proportional to the wind energy utilization coefficient. That is why the wind energy utilization coefficient C is used to express the efficiency of wind energy used by wind turbines. p To illustrate. There are many factors that will affect this data, such as the speed of wind turbine rotation, wind speed, and blade pitch angle data, etc. Assuming that there is no need to consider the diameter and rotation speed of the impeller, in some special cases, the tip speed ratio λ is introduced to further analyze the performance of the impeller. λ is the ratio between the speed at the tip of the blade and the wind speed. See the following formula (1.5):

[0069]

[0070] Where a is the speed of the wind turbine, r / s, ω is the angular velocity of the wind turbine, rad / s; R, v are the same as the above formula. In a wind turbine generator set with a variable speed but equal frequency, the structure of the wind turbine generator of the present invention is a variable pitch. Moreover, in most cases, the wind energy utilization coefficient is closely related to the working efficiency of the wind turbine generator. The performance of the wind turbine during specific operation can be judged according to the wind energy utilization coefficient.

[0071] Wind power generation is a clean energy technology that uses wind energy to convert it into electrical energy. It can effectively reduce environmental pollution, reduce the use of fossil fuels, and ease energy pressure. It is one of the renewable energy sources that is widely used worldwide. Wind power generation does not produce greenhouse gases such as carbon dioxide and other harmful substances, and does not pollute the environment. In addition, the use of wind power generation can effectively reduce the consumption of non-renewable energy and achieve the goal of saving energy.

[0072] 1.3 Energy Storage System

[0073] Efficient use of energy storage materials, equipment and energy storage technologies can make the energy storage of new energy systems more efficient, thereby providing a more stable and efficient energy storage system for independent wind, solar and storage combined control systems.

[0074] Chemical energy storage technology requires the support of an appropriate energy storage system to complete the transfer of chemical energy required by the device. Lithium batteries are used in this device. The energy storage efficiency of lithium batteries can be as high as 85% or more. This is closely related to the basic structure of the lithium battery. In addition to the single battery, the lithium battery energy storage system also has a charging and discharging system and a battery management system to support each other. This system has more efficient energy storage and discharge, greater energy density, and higher safety and stability.

[0075] The battery energy storage system can be used in conjunction with the photovoltaic power generation system to store the remaining electricity from photovoltaic power generation during the day and use it at night or on cloudy days to meet household or industrial electricity needs. Since the wind power generation system is limited by natural conditions and the power generation is greatly affected by the weather, a stable energy storage system is required to maintain normal power supply when there is insufficient wind or power generation is impossible. Compared with traditional thermal power generation, the battery energy storage system does not emit any harmful substances and does not pollute the environment. It can store various types of energy and can release electricity at any time according to demand. Because its design adopts advanced control technology, the battery energy storage system has high reliability and stability.

[0076] Lithium batteries are widely used because of their high energy density, long life and high efficiency. They can be used in various applications such as consumer electronics, electric vehicles and large-scale energy storage systems. Lithium batteries are composed of positive electrodes, negative electrodes, separators and electrolytes. The positive electrode is usually made of lithium ion compounds (such as LiCoO2), and the negative electrode is usually made of carbon materials (such as graphite). The separator is used to prevent short circuits between the positive and negative electrodes and allow ions to pass through. The electrolyte is a mixture of lithium salts and organic solvents for ion transport. When charging, the positive electrode releases lithium ions and oxidizes in the process. These ions pass through the separator and enter the negative electrode. At the same time, electrons flow from the positive electrode to the negative electrode. Once all the lithium ions enter the negative electrode, it means that the battery is fully charged. When discharging, the negative electrode receives lithium ions and reduces them, while releasing electrons. These electrons flow to the positive electrode, thereby generating current. When the lithium ions in the negative electrode are exhausted, the battery no longer works. As an energy storage technology, lithium batteries are widely used for their high energy density, long life and high efficiency.

[0077] 2. Wind, solar and energy storage combined control system

[0078] 2.1 Control strategy of wind-solar hybrid power generation system

[0079] The output power of the wind system in this system is assumed to be P1, the output power of the photovoltaic system is P2, the output power of the energy storage system is P3, and P4 is used as the power to maintain the load. Under normal circumstances, the control strategy of the system is to make real-time adjustments based on changes in the weather by monitoring the real-time output of electricity and the difference in load. Control principle: Real-time monitoring of the power output of the wind-solar hybrid power generation system and comparing it with the load requirements, and then controlling the charging and discharging of the energy storage system in the wind-solar hybrid power generation system through the control device. When the output power of the system is higher than the load requirement, the energy storage device charges the system; when the load requirement is higher than the output power of the system, the energy storage part discharges the system. The system working mode of this system is as follows: Figure 2 As shown, according to the different climates, the devices of this strategy are divided into four different climate conditions, and the system is divided into seven different working conditions according to the four climate conditions.

[0080] The traditional control method is to change in real time with the climate at that time, and then find the best control result according to the weather at that time, and then charge and discharge the energy storage device through the system. According to the load requirements, a new method of electric energy storage is designed, and the state of the power of the photovoltaic battery is monitored to realize the operation of the wind-solar complementary power generation system, which reduces the abandonment of wind and light by wind turbines, and can also improve the comprehensive utilization rate of wind and light in this system. The principle of the wind-solar power generation system is as follows: Figure 3 express.

[0081] In the working mode of modes 1 to 4, the energy storage devices are all in the state of discharge. The three power generation modes of the photovoltaic system, wind system and energy storage system will change accordingly with the change of load. At the same time, the load is in the working state. However, in the system modes 5 to 10, they are all in the fully charged state, and only the SOC problem needs to be considered. Each system can switch freely between the several modes described above. In the wind, solar and storage joint control system strategy, the SOC of the energy storage system must be monitored in real time.

[0082] 2.2 Composition of wind, solar and storage combined power generation system

[0083] This invention studies a small independent wind, solar and storage joint control system. The independent characteristics determine that this design does not participate in grid-connected power generation. Since the system is a small wind, solar and storage joint control system, the small characteristics determine that the system has a small power generation capacity. Therefore, the composition of the system is as follows: Figure 4 As shown, the system is mainly composed of wind power components, solar power generation components, core controller components, energy storage system control components and various load components. The wind turbine generator includes a wind turbine, a permanent magnet synchronous generator, etc. The light energy system includes a photovoltaic cell array, etc. The controller components include control core and power conversion circuits.

[0084] In the wind-solar-storage joint control system circuit, in order to reduce transmission loss and simplify the system structure, the wind turbine and the generator are usually connected in a direct drive mode. The wind turbine can pull the generator connected to it to rotate under the influence of wind energy, and then convert the mechanical energy of wind energy into electrical energy, and power the energy storage system under the control of the control system. The power generation of the photovoltaic system utilizes the principle of the photovoltaic effect. The electrical energy generated by the photovoltaic system can complete the power supply of the energy storage system under the action of the control device. The electrical energy generated by the wind power generation system and the photovoltaic system can provide the required electrical energy for the energy storage system and the load through the system's DC bus. The energy storage device part serves as the energy storage system in the entire independent wind-solar-storage joint control system. The electrical energy stored in this module can directly supply the load.

[0085] The controller component is the core component of the system. Its main work content is to complete the control of the entire system, including wind power generation and photovoltaic power generation, as well as the control of the charging and discharging of the energy storage system and the protection of the charging and discharging of the battery. In nature, since wind energy and light energy are very random, in order to maximize the acquisition of electrical energy, the control system also needs to complete the maximum tracking and control of wind energy and light energy.

[0086] 2.2 Selection of main functional modules

[0087] 2.2.1 Core Control Module

[0088] In this system, the core control module should complete the control of the photovoltaic system, wind energy system and energy storage system. Because the wind and light in nature are very random, the control system should analyze the data of each module and make effective judgments.

[0089] The core control module includes a single-chip microcomputer, which is a common 51 single-chip microcomputer STC89C52 that processes data very efficiently. For detailed pinout, see Figure 5 , the single-chip microcomputer processes data quickly and has low power consumption, which is more in line with the independent and small conditions of this design. The single-chip microcomputer is an eight-bit single-chip microcomputer with many interfaces and powerful computing power. This single-chip microcomputer uses the MCS-51 instruction set, and the frequency of the built-in clock can reach 33MHz, with fast response speed and very high working efficiency. This control system has a lot of peripherals, including built-in 128 bytes of RAM and 8kb flash memory, multiple groups of timers and counters, two groups of serial ports and one group of SPI and one group of IAP, which can facilitate various data acquisition processing and communication. This system has a lot of interfaces and can flexibly exchange and communicate data with other modules of this system. The power consumption of the single-chip microcomputer is very low, and many working modes are in low power consumption mode, which is conducive to extending the battery life. The single-chip microcomputer used in this system has very powerful computing power, can support fast arithmetic and logical operations, and can handle more complex data calculations under any circumstances or emergencies. This system chip has many protection mechanisms, including write protection, read protection and code protection, which can protect the programs stored in this chip from unauthorized tampering. The development tool chain of this microcontroller is relatively complete and supports multi-language development, which can easily carry out software development in various environments.

[0090] In addition to the CPU, the 51 microcontroller also includes ROM, RAM, EEPROM memory and other memories for storing programs, data and configuration information. Among them, ROM is a read-only memory used to store programs and data that do not change frequently; RAM is a random access memory used to store temporary variables and runtime data; EEPROM is an erasable and programmable memory that can be used to store configuration information and user data, etc. The 51 microcontroller also has a variety of peripheral interfaces, such as timers, counters, serial ports, parallel ports, interrupt controllers, etc., which can communicate and control with external devices. Among them, timers and counters can be used for applications such as timing, delay and frequency measurement; serial ports and parallel ports can be used for data transmission and communication; interrupt controllers can monitor and respond to various interrupt events to achieve priority processing and asynchronous communication. For software development, the 51 microcontroller provides good support. It can be programmed in a variety of programming languages ​​such as C language, assembly language, BASIC language, and there are many IDEs and compilers to choose from. In addition, since the 51 microcontroller is widely used in the field of embedded systems, there are many standard libraries and routines available for use, which is convenient for developers to quickly build applications. In short, the 51 single-chip microcomputer is a mature, stable and reliable microcomputer that has been widely used in various electronic products and industrial automation control. It has the characteristics of small size, low cost, low power consumption, strong programmability, etc., and is suitable for various embedded systems and low-power applications.

[0091] 2.2.2 Photovoltaic power generation module

[0092] The photovoltaic power generation module of this system consists of a solar panel made of crystalline silicon and a boost module. The solar panel is also called a photovoltaic panel. The electricity generated by sunlight passing through the photovoltaic panel is then supplied to the energy storage system and the microcontroller through the boost module of the system.

[0093] Photovoltaic panels are made up of many photovoltaic cells, each of which is made of semiconductor materials, such as silicon. When sunlight shines on the photovoltaic cells, electrons are released from the semiconductor material and flow along the wires to form direct current, which can be fed into the inverter, which converts it into alternating current, so that it can be powered to the house or other equipment. Before installing photovoltaic panels, you need to determine the best installation location and angle. Generally, photovoltaic panels should face south because this will get the most sunlight. In addition, the shadow situation around the building should also be considered, because even a small amount of shadow can significantly reduce the efficiency of the panel. In addition to the installation location and angle, you also need to consider the type of photovoltaic panel. Photovoltaic panels include monocrystalline silicon, polycrystalline silicon and amorphous silicon. Monocrystalline silicon panels are the most efficient, but also the most expensive; polycrystalline silicon panels are less efficient, but cheaper; amorphous silicon panels are a new technology that has higher efficiency and lower cost, but it has not yet been widely used. After installing PV panels, regular maintenance is required to ensure they are functioning properly, which includes cleaning the panel surface, checking for loose or damaged wire connections, and regularly checking the performance of the panels.

[0094] Photovoltaic power generation mainly utilizes a special effect in semiconductors, which is usually called the photovoltaic effect. This effect can convert light energy resources in nature into electrical energy needed by this system. Since the system is small and independent, it does not participate in grid-connected power generation. Moreover, because it is a small system, the power generation capacity of the system is relatively small. Therefore, this system only uses one solar panel to generate electricity and then supplies it to the energy storage system and microcontroller through a boost device.

[0095] 2.2.3 Wind power generation module

[0096] The wind power generation module of this system is mainly composed of blades, wind turbines and boost modules. When the blades of the wind turbine capture the wind in nature, they will start to make the generator move. Then the generator drives the coil inside the generator through rotation. The coil will cut the magnetic field inside the generator, so that the generator will generate current and voltage, and then the boost module will be used to power the energy storage device and the single-chip microcomputer.

[0097] The wind turbine of this system is generally composed of nacelle blades, shaft, low-speed shaft and generator. The faster the wind turbine cuts the magnetic lines of force or the larger the induced electromagnetic field, the stronger the induced electromotive force becomes, so the current generated becomes larger than before.

[0098] Wind power generation is a clean energy technology that converts wind energy into electrical energy. It uses wind energy to drive the turbine to rotate, thereby driving the generator to generate electricity. This technology has the advantages of being environmentally friendly, renewable, and low-cost, and can be used in scenarios of all sizes, from small household uses to large industrial applications. The principle of wind power generation is relatively simple. When the wind blows through the wind rotor blades, the blades are pushed by the airflow and rotate. The wind rotor transmits the rotational torque to the turbine through the axial direction. The turbine converts the rotational kinetic energy into mechanical work, further driving the generator, which converts the mechanical energy into electrical energy and outputs it to the power grid. The core component of wind power generation is the wind turbine group, which consists of a wind rotor and a main shaft, a gearbox, a generator, a control system, etc. Among them, the wind rotor is usually a three-blade or two-blade type, and the blade angle can be automatically adjusted according to the wind speed to optimize the energy conversion efficiency. The main shaft and gearbox are the key components that connect the wind rotor and the generator, which can amplify the rotation speed of the wind rotor and increase the output torque. The generator is the core component that converts mechanical energy into electrical energy, and usually uses a synchronous generator or an asynchronous generator. The control system is responsible for monitoring wind speed, adjusting blade angles, protecting wind turbines, and managing power generation systems. Wind power generation is a very environmentally friendly clean energy source. Compared with fossil fuels, it does not produce any pollutants or greenhouse gases and has less impact on the environment. Wind power generation is a renewable energy source. Wind is always available and can provide energy continuously. Due to the low equipment and operating costs, wind power generation is also economical.

[0099] 2.2.3 Energy Storage Module

[0100] The energy storage module is mainly composed of a battery, a backup battery and an ADC acquisition chip. The battery is used to store the electricity generated by the photovoltaic system and the wind energy system, and then provides a fixed voltage to the microcontroller and the load through the boost module. The ADC acquisition chip collects the analog values ​​of the voltages generated by the energy storage system, the photovoltaic system and the wind energy system, and then converts them into digital signals and transmits them to the control system, so that the control system can make corresponding processing according to the status of the energy storage system, the wind energy system and the photovoltaic system.

[0101] In the energy storage system, the battery mainly provides voltage to the microcontroller and the load, and the wind energy system and the photovoltaic system provide voltage to the battery. The control system will determine whether it is necessary to switch to the backup power supply based on a range of battery voltage preset in the system. In this system, a dangerous voltage and a minimum voltage that the battery can withstand can be set. The voltage of the wind energy system and the photovoltaic system will be judged within a range between the two voltages. When the battery voltage is within this voltage range and the voltage provided by the wind energy system and the photovoltaic system is insufficient, the system will automatically switch to the backup power supply to continue to supply power to the load and the microcontroller. When the wind energy system and the photovoltaic system continue to supply power and fully charge the battery, the control system will automatically switch to battery power supply, so that the system can achieve a stable output.

[0102] 2.2.4ADC0832 acquisition system module

[0103] The acquisition system module uses the ADC0832 module, which can collect electrical signals transmitted by the wind energy system, photovoltaic system and energy storage system, and then convert them into digital signals and transmit them to the control system. The control system can then make corresponding processing and judgments based on these data.

[0104] ADC0832 is an analog-to-digital conversion chip with eight-bit resolution and a dual-channel multiplexer. This chip uses CMOS technology and its main function is to digitize analog signals. This chip has a low cost and is suitable for many occasions, such as temperature sensors, pressure sensors, etc. Therefore, this design uses this chip for digital-to-analog conversion. The chip has high accuracy and strong conversion capability. If the reference voltage is higher, the accuracy will be higher. ADC0832 has two input channels, and one of the channels can be selected for conversion through the internal multiplexer. This function can effectively reduce the number of pins, so that the chip can adapt to different application requirements. The chip integrates an internal 1.23 volt reference voltage source, which can provide a reference for external analog signals. Therefore, high-precision conversion can be performed without an additional reference voltage. The chip has a fast conversion speed and can complete a complete conversion within eight clock cycles. It is very helpful for applications that require high-speed data acquisition and processing. The chip has very low power consumption and only consumes 0.1μA in standby mode, which can achieve long-term battery power supply and is suitable for battery-powered occasions. The chip has a wide range of applications and is often used in digital processing of sensor signals, so it can be used in many fields. The ADC0832 chip is a digital-to-analog conversion chip with excellent characteristics such as high precision, multiplexing, fast conversion time and low power consumption. Using this chip in this system can meet the ultimate accuracy and computing speed requirements of the system.

[0105] 2.2.5 LCD1602 display system module

[0106] The LCD1602 display system module is a common 16x2 character LCD display, usually used with a microcontroller (such as Arduino or Raspberry Pi, etc.), which can display simple text and numbers, and the backlight brightness and contrast can be controlled by program. The module consists of two parts: the LCD screen and the driver chip. The LCD screen consists of 1602 pixels, with a total of two rows, and each row can display 16 characters. The driver chip is responsible for converting the input signal into the pixel output of the LCD screen to display images or text on the screen. Commonly used driver chips are HD44780 and KS0066. The LCD1602 display system module requires at least 6 pins to connect to the microcontroller: VSS, VDD, VO, RS, RW and E. Among them, VSS is ground, VDD is the positive power supply, VO is contrast adjustment, RS is register selection (used to select instructions or data transmission), RW is the read / write signal line (used to determine whether a read or write operation is in progress), and E is the enable line used to start instructions or data transmission. Before using the LCD1602 display system module, you need to initialize it, set the display mode, such as the number of lines, character size and other information, and connect it to the microcontroller. Then, you can send commands or data to the LCD1602 to control its display content. When the LCD1602 is no longer needed, you can turn it off or disconnect its power supply by sending the corresponding command to avoid wasting power. This module can be widely used in various embedded systems, controllers, robots and other devices, such as displaying program prompt information, sensor data, debugging information, etc., and can meet various needs by using different fonts, character sets and custom images.

[0107] 2.3 System Design Impact

[0108] Since my country has a lot of terrain and landforms, and these terrain and landforms have abundant solar and wind energy resources. Therefore, according to relevant research, when the height from the ground reaches 10m, there can be up to 1 billion kW of wind energy resources. Due to its excellent geographical location, my country also has a large amount of solar energy. Up to 2 / 3 of the places have an average sunshine time of about 2,000 hours per year, and the total radiation per year can reach 6000MJ / m 2 Therefore, there is a broad space for the development of independent wind, solar and storage joint control systems.

[0109] The independent wind, solar and energy storage combined control system is a power system that can complement each other in output power. The system is mainly composed of photovoltaic systems, wind energy systems and energy storage systems. The combined output power of these three systems can provide a certain amount of electricity for power users. However, due to climate reasons, two of the power generation systems are very susceptible to weather and climate, so the system combines the wind energy system and the photovoltaic system. In addition, the energy storage system can make the independent wind, solar and energy storage combined control system no longer affected by the climate and become more stable. Therefore, how to effectively coordinate the control of the independent wind, solar and energy storage combined control system becomes particularly important.

[0110] In terms of law, this design complies with the laws and regulations and land use norms that new energy systems need to follow, as well as various policies and norms for photovoltaic and solar power generation. This invention can ensure legal and compliant operation and can make a contribution to the development of new energy and environmental protection. While improving legal awareness and social responsibility, it also enhances the importance of saving resources and protecting the earth's environment.

[0111] In terms of economy, traditional thermal power generation needs to burn a large amount of garbage or coal every day, causing serious environmental pollution and requiring a lot of costs for power generation and maintenance. The materials used in the present invention are low-cost, simple to maintain and have a long service life. There is no fuel consumption and all that is used are wind and light energy that exist naturally in nature. Therefore, the present invention has a lower power generation cost and a relatively high economic benefit. The present invention is suitable for remote areas and mountainous areas. While generating electricity, the related technology will also drive the development of local manufacturing and service industries, and will also provide a considerable number of jobs and employment opportunities, promoting economic growth. If the technology is widely developed, it will surely promote the development of global new energy business, drive the development of related enterprises, and generate more economic benefits.

[0112] 3 Hardware System Design

[0113] 3.1 Single-chip microcomputer control system

[0114] The control part of this system is composed of a 52-chip minimum system board. The MCU minimum system is a microcontroller based on the Intel 8051 architecture, which can be used in various embedded applications. The minimum system refers to the minimum hardware components required in a complete 52-chip system. The system includes a 52 chip, a clock circuit and a reset circuit. The 52-chip chip is the core of the minimum system. It includes a series of important functions such as CPU, memory, input and output ports, and timers. The chip has the characteristics of high performance, easy programming and low power consumption.

[0115] The microcontroller requires a temperature clock signal to synchronize the operation of the processor, so the clock circuit is another important component of the minimum system such as Figure 7 ,The clock circuit is usually composed of a crystal oscillator, two capacitors and a Zener diode. The selection of the crystal oscillator frequency needs to be evaluated and selected based on the actual application scenario.

[0116] When the microcontroller is powered on or reset, a stable voltage level is required to ensure the normal operation of the chip. The reset circuit usually consists of a resistor, a capacitor and a button. In the reset circuit, the resistor acts as a current limiter and the capacitor acts as a delay device. They can ensure that the chip can be initialized correctly after power-on or reset. The reset circuit is as follows: Figure 8 shown.

[0117] The working principle of the minimum system is very simple. When powered on or reset, the reset circuit will reset the chip to its initial state. At this time, the clock circuit starts to provide a stable clock signal to the chip. The chip will execute the program step by step according to the instructions in the program memory. If communication with external devices is required, the reading and output of data can be controlled through the input and output ports.

[0118] 3.2 Wind, solar and storage power generation devices

[0119] This part includes wind turbines, solar panels, TP4056 modules, energy storage systems, backup power supplies and boost modules. Fig. 9 This is the schematic diagram of the wind, solar, and energy storage device.

[0120] The main operation method is to transfer the electric energy converted from wind and solar energy by solar panels and wind turbines to the battery through the TP4056 module. Then the battery is boosted from 3V to 5V through the boost module and transferred to the load and the microcontroller for power supply.

[0121] This module is the core module of the system. It is mainly used to obtain electrical energy and provide electrical energy for the load and the single-chip microcomputer to ensure the complete operation of the entire system. The electrical energy converted from natural resources through the power generation system is supplied to the battery. When the entire system cannot detect this input and the battery power does not meet the minimum power set by the system, the system will automatically switch the power supply to the backup power supply for the load and the single-chip microcomputer. When the electricity provided by wind energy and solar energy fully charges the battery, the system will switch to battery power supply and then replenish the backup power supply to achieve a stable output.

[0122] 3.3ADC acquisition module

[0123] The main function of the ADC0832 module is to convert analog signals into digital signals required by the microcontroller. In this system, when the electric energy generated by the wind turbine and photovoltaic solar panels is transmitted to the battery, it is transmitted to the module through the pin of the ADC acquisition module. Then the module converts the analog signals generated by other modules into digital signals transmitted to the microcontroller. At the same time, it detects the signals transmitted by the battery to the microcontroller and converts them into analog signals to be transmitted to the microcontroller for control. Fig.10 shown.

[0124] The basic workflow of the ADC acquisition module includes four steps: sampling, holding, quantization, and encoding. Sampling refers to converting a continuous analog signal into discrete samples; holding refers to storing samples before quantization to avoid distortion; quantization refers to converting the analog signal after holding into a digital signal and determining its accuracy; encoding refers to converting the digital signal into a binary number for easy transmission and processing. In practical applications, the ADC acquisition module is usually combined with a microprocessor or other control circuit to facilitate data processing and analysis.

[0125] The ADC acquisition module can be used to collect various types of signals, such as physical quantity signals such as temperature, pressure, humidity, or analog signals such as audio and images, for digital processing. It can also be used in combination with various types of sensors, such as photoresistors, Hall elements, pressure sensors, etc., to achieve accurate measurement and control of physical quantities. The ADC acquisition module can convert physical quantities into digital signals, which can then be automatically controlled by a microcontroller or other controller, such as turning lights on and off, adjusting temperature, etc.

[0126] 3.4 LCD1602 display module

[0127] LCD1602 is a common 16x2 character liquid crystal display, which has two lines, each line can display 16 characters. This display is usually used with a microcontroller, such as Arduino or Raspberry Pi. This display can display simple text and numbers, and the backlight brightness and contrast can be controlled by the program. To use it, you need to connect at least 6 pins: VSS, VDD, VO, RS, RW and E, where VSS is ground, VDD is the positive power supply, VO is contrast adjustment, RS is register selection (used to select instructions or data transmission), RW is the read / write signal line (used to determine whether a read or write operation is being performed), and E is the enable line, which is used to start instructions or data transmission. The principle is shown in Fig.11 .

[0128] LCD1602 only needs a small amount of electricity to work, so it is very suitable for electronic devices that need to run for a long time. LCD1602 uses reflective liquid crystal display technology, which can display black characters without using backlight, so the contrast is very high. At the same time, LCD1602 also has a wide viewing angle range, and users can see clear display content from multiple angles.

[0129] 4. Software System Design

[0130] 4.1 Main program design

[0131] The main program design idea is as follows Fig.12 First, initialize the peripherals and program display interface. Before that, you can set the threshold 1 and threshold 2 of the battery voltage. After that, the device will regularly detect the voltage delivered by the wind system and the battery voltage. If the battery voltage is lower than threshold 1, the main control system will switch the power supply to the backup power supply and the buzzer will start a short reminder. If the battery voltage is lower than threshold 2 but higher than threshold 1, the main control system of the system circuit will use whether the wind energy system and the photovoltaic system provide voltage as a basis. If there is no charging voltage, the main control system will switch the power supply to the backup power supply and the buzzer will give a short reminder. Then the system will check whether the battery is full. If it is full, the system will switch the power supply to the main power supply. Of course, if the voltage is higher than threshold 2, the same is true. If the backup power supply is used, the voltage is higher than threshold 2 at this time, then the system will determine whether the capacity of the main battery is full. If it is full, the system will switch the power supply to the main battery.

[0132] Next is the flow chart displayed by LCD1602. If the system is charging, the system's LCD1602 will display that it is charging. During charging, if the battery is full, it will display the full status. After that, it will detect whether there is a key pressed. Then the system will process according to the key pressed and during the processing, the system will still regularly detect the charging voltage and the battery voltage.

[0133] Usually a delay function is added to the main program to ensure the stable operation of the program. C language is usually used to define the delay function. The delay function mainly uses meaningless instructions to achieve a delay on the microcontroller. Different types of variables can be used in C language to design delay functions. After many experiments, the unsigned char type has more optimized code than unsigned int. The crystal oscillator of the system microcontroller is 11.0592MHz, and the crystal oscillator is 11.0592MHz, which means that one machine cycle is 1us.

[0134] 4.2ADC0832 Programming

[0135] ADC0832 is a classic eight-bit analog-to-digital converter with the characteristics of low power consumption, high precision and ease of use. It is widely used in microcontroller systems.

[0136] First, you need to connect the VCC pin of ADC0832 to a 3.3V power supply, the GND pin to the ground, the AIN0 pin to the signal to be measured, and the CLK, CS and DIN pins to the IO ports of the microcontroller. After the connection is completed, the control of ADC0832 can be realized through software programming.

[0137] It is necessary to define the GPIO port, including the port and pin number of the CLK, CS and DIN pins, and the analog input channel of the AIN0 pin, and then perform initialization configuration, including setting the GPIO port to output or input state, and setting the working mode and clock frequency of ADC0832.

[0138] Next, enter the data acquisition loop, in which the conversion instruction is first sent to ADC0832, then wait until the conversion is completed and finally read and process the conversion result. The conversion instruction usually consists of 5 bytes, one byte is the start byte, the second byte is the analog input channel selection byte, the third byte is the control byte, the fourth is the invalid byte and the last fifth byte is the end byte.

[0139] After the conversion command is sent, it is necessary to wait for a while to ensure that the conversion has been completed. The conversion time of ADC0832 is between 10us and 100us. The conversion result is usually 8-bit binary data. After reading, necessary conversion and processing can be performed. For example, the collected voltage value is converted into a temperature value or other physical value. After that, the system selects the appropriate data output method according to the application requirements, such as sending it to the host computer through the serial port or displaying it on the LCD screen.

[0140] 4.3 LCD1602 Programming

[0141] LCD1602 is a commonly used character LCD display, usually used as an output device in microcontroller applications. Connect the VSS pin of LCD1602 to ground, the VDD pin to 3.3V power supply, and the V0 pin to the ground and 3.3V power supply through a 10K potentiometer to adjust the contrast. Connect the RS, RW and E pins to the GPIO port of the microcontroller respectively, and connect the D0~D7 pins to the GPIO port of the microcontroller. After the connection is completed, control the LCD1602 through software programming.

[0142] In the software design, the GPIO port is defined, including the port and pin number of the three pins RS, RW and E, as well as the port and pin number of the pins D0 to D7. Then the initialization configuration is performed, including setting the GPIO port to output state, setting the display mode of LCD1602, clearing the display content, etc. Next, the content to be displayed is implemented in the main function, such as welcome words, sensor data, etc. Characters or strings can be output by calling a special display function, and operations such as clearing the screen and moving the cursor can be performed when necessary. Among them, the output of characters or strings can use custom functions or standard library functions. At the end of the program, a delay function needs to be set to ensure that LCD1602 can correctly respond to instructions and complete the corresponding display operations. The simplest method is to use timer interrupts to achieve precise delays. Reasonable program design and debugging can achieve clear, stable, and beautiful LCD1602 display effects, and provide necessary information output for various application requirements.

[0143] This function is called LCD_DispStr, and its main function is to let the LCD display a string continuously starting from a certain position, where column is the column coordinate of the position, row is the row coordinate of the position, and p_str is a pointer to the position where the string is stored.

[0144] 5 Prototype and debugging

[0145] 5.1 Prototype

[0146] Fig.13 It is a prototype, mainly composed of a wind turbine, solar panels, batteries and a control module.

[0147] 5.2 Debugging

[0148] 5.2.1 System startup status

[0149] like Fig.14 The system startup state;

[0150] The Battery_V status bar indicates the battery voltage, and the capital letter M on the right indicates that the system is currently powered by the main power supply. If it is switched to B, the system will use the backup power supply.

[0151] Status is the status bar of the system. No Charge means that neither the wind power system nor the photovoltaic system generates current and transmits it to the battery. On the contrary, if it is Charging, current is input to the battery.

[0152] 5.2.2 Wind and solar system working status

[0153] The status of the wind and solar system when working is shown in Fig.15As shown, LCD1602 displays Charging, which means the battery is being charged. That is, when outdoors, the system can receive electricity converted from photovoltaic and wind energy and supply power to the battery and the system.

[0154] When the system board is turned on, the power light on the system board will turn on. If the wind energy system and photovoltaic system are started and working, the charging indicator light on the TP4056 charging module will light up, indicating that the system is in charging state.

[0155] 5.2.3 Battery voltage setting status

[0156] Fig.16 It is the battery voltage setting state, which is the setting state of the maximum battery voltage. When the battery reaches this voltage, the system will display Full on LCD1602, indicating that the battery is fully charged. When the system reaches this state, if the system is using the backup power supply at this time, it will switch to battery power supply when the battery is fully charged.

[0157] 5.2.4 Threshold voltage setting state

[0158] Fig.17 The threshold voltage setting state, in this state, you can manually set the two threshold voltages of the battery through the button, which are threshold 1 and threshold 2. Threshold 1 is the lowest voltage that the battery can withstand. When the battery reaches this voltage, regardless of whether there is current input, the system will actively switch to the backup power supply to power the system and load. Threshold 2 is set to a dangerous voltage. When the battery reaches below this voltage and is above the voltage of threshold 1, if the system cannot detect the current input in this range, that is, wind power and photovoltaic power no longer supply power to the system and load due to weather reasons, when this state is reached, the system will actively switch to the backup battery power supply until the battery power reaches the set maximum voltage.

[0159] Those skilled in the art will appreciate that numerous variations to the above description are possible, and that the examples and figures are intended only to describe one or more specific implementations.

[0160] Although what is considered as exemplary embodiments of the present invention has been described and described, it will be understood by those skilled in the art that various changes and substitutions may be made thereto without departing from the spirit of the present invention. In addition, many modifications may be made to adapt specific situations to the teachings of the present invention without departing from the central concept of the present invention described herein. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but the present invention may also include all embodiments and their equivalents that fall within the scope of the present invention.

Claims

1. An independent wind, solar and energy storage joint control system, characterized by: It includes a core control module, a wind power generation module, a photovoltaic power generation module, an energy storage module, an ADC acquisition module and a display module; the wind power generation module and the photovoltaic power generation module respectively use wind turbines and photovoltaic panels to convert wind and light resources into electrical energy to supply the energy storage module to achieve the endurance of the device; the energy storage module includes a battery and a backup battery, the battery is used to power the main control module and the load, two voltage thresholds are set for the battery, when the wind and light resources are too small and the battery power is within the set voltage threshold range, the system will automatically switch to the backup battery to supply the device and load endurance.

2. The independent wind-solar-storage joint control system according to claim 1 is characterized in that: The photovoltaic power generation module includes a photovoltaic panel and a boost module. The electric energy generated by sunlight passing through the photovoltaic panel is supplied to the energy storage module through the boost module.

3. The independent wind-solar-storage joint control system according to claim 2 is characterized in that: The photovoltaic cell panel is composed of a plurality of photovoltaic cells, and the photovoltaic cell panel is arranged facing south.

4. The independent wind-solar-storage joint control system according to claim 3 is characterized in that: The photovoltaic cell panel is one of monocrystalline silicon, polycrystalline silicon and amorphous silicon.

5. The independent wind-solar-storage joint control system according to claim 1 is characterized in that: The wind power generation module comprises blades, a wind turbine generator and a boost module.

6. The independent wind-solar-storage joint control system according to claim 5 is characterized in that: The wind turbine generator is a variable pitch wind turbine, the pitch angle of which can be changed with the direction of wind force, thereby achieving the effect of adjusting the output power of the wind turbine.

7. The independent wind-solar-storage joint control system according to claim 1 is characterized in that: The ADC acquisition module is an ADC0832 module, which can collect the electrical signals transmitted by the wind power generation module, photovoltaic power generation module and energy storage module, and then convert them into digital signals and transmit them to the core control module. The core control module can make corresponding processing and judgment based on these data.

8. The independent wind-solar-storage joint control system according to claim 1 is characterized in that: The basic working process of the ADC acquisition module includes sampling, holding, quantization and encoding.

9. The independent wind-solar-storage joint control system according to claim 1 is characterized in that: The display module is an LCD1602 display system module, including a liquid crystal display screen and a driver chip.

10. The independent wind-solar-storage joint control system according to claim 1 is characterized in that: The core control module includes a single chip microcomputer, and the single chip microcomputer adopts STC89C52.

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