A wind-solar-storage intelligent display screen full-energy regulation method and device and display screen

Abstract

The application provides a wind-solar-storage intelligent display screen full-area energy regulation and control method and device and a display screen, relates to the device technical field of balancing loads in a network by using an energy storage method, in particular to the technical field of wind-solar-storage intelligent display screens, and constructs a four-layer progressive full-area energy regulation and control system. The first layer is source end power generation dispatching, the charging input states of photovoltaic power generation units and wind power generation units are switched according to the light intensity, the light threshold value is dynamically adjusted according to seasons, the comprehensive utilization rate of wind-solar resources is improved, and anti-backflow control is simultaneously performed to protect power generation equipment. The second layer is load hierarchical power supply, high-priority loads and low-priority loads are managed in stages according to the state of charge of energy storage units, and core display priority operation is ensured.

Description

Technical Field

[0001] This invention relates to the field of devices for balancing loads in a network using energy storage methods, and particularly to the field of wind, solar, and energy storage smart display screen technology, specifically a method, device, and display screen for global energy regulation of a wind, solar, and energy storage smart display screen. Background Technology

[0002] Smart LED information displays have wide applications in scenarios such as variable message signs on highways, electronic bus stop signs in cities, scenic area guide information screens, and disaster prevention and early warning terminals in remote areas. However, these deployment locations are often far from the municipal power grid. Relying on dedicated power lines for power supply results in high line construction costs, long construction periods, and high subsequent operation and maintenance costs. Off-grid or microgrid power supply solutions based on the complementarity of wind and photovoltaic power generation and the configuration of energy storage batteries have become the main technical direction for solving the power supply needs of LED information displays in remote scenarios.

[0003] Chinese invention patent application CN202311739597.7, published on April 21, 2026, discloses a system combining wind power generation and solar power generation. The system includes a solar photovoltaic array, a wind turbine, an energy storage device, a main controller, and a display screen. The solar photovoltaic array is equipped with a solar sensor and an orientation adjustment mechanism (i.e., a tracking mechanism). Controller A controls the angle adjustment of the photovoltaic panels based on the solar orientation angle and tilt angle detected by the solar sensor to improve photovoltaic power generation efficiency. The wind turbine is equipped with a wind direction adjustment mechanism to adjust the wind turbine's orientation according to the wind direction.

[0004] The aforementioned existing technical solutions have the following shortcomings when applied to the scenario of full-area energy control for smart LED information displays: First, energy storage management relies solely on independent adjustments based on sunlight and wind direction, failing to dynamically predict battery power status or implement tiered load scheduling. When the battery's state of charge is acceptable but its actual discharge capacity decreases, continuous high-current extraction can easily trigger undervoltage protection, leading to abnormal power outages for the display screen. During prolonged periods of cloudy or rainy weather, all loads are indiscriminately powered, compromising the core display's reliability.

[0005] Second, the tracking mechanism's control is not linked to the energy storage capacity. When the energy storage capacity is low or the light intensity is extremely weak, the tracking mechanism still consumes electrical energy to perform tracking actions that do not provide any real benefit, thus exacerbating energy loss.

[0006] Third, the power supply architecture adopts a grid-connected topology, which has multi-stage conversion losses in the "DC-AC-DC" process. At the same time, the existing system cannot coordinate with the photovoltaic modules to perform passive snow melting without additional power consumption based on weather and power status, and the system loses its power generation capacity in winter snow accumulation scenarios.

[0007] Therefore, there is an urgent need to propose a method, device, and display screen for global energy regulation of wind, solar, and energy storage smart display screens. Summary of the Invention

[0008] To address the problems mentioned in the background art, the present invention provides the following technical solution: a method for global energy regulation of a wind-solar-storage smart display screen, comprising: S1. Get the current date and determine the current season; S2. Determine the first and second light thresholds based on the current season; S3. Obtain the light intensity, switch the charging status of the photovoltaic power generation unit and the wind power generation unit to the energy storage unit according to the light intensity, and perform anti-backflow control on the two output voltages: when the light intensity is higher than the first light threshold, only the photovoltaic power generation unit is activated; when the light intensity is lower than the second light threshold, only the wind power generation unit is activated; when the light intensity is between the first light threshold and the second light threshold, both the photovoltaic power generation unit and the wind power generation unit are activated simultaneously. S4. Obtain the state of charge of the energy storage unit and control the power supply to high-priority loads and low-priority loads according to the state of charge. S5. Obtain project parameters, assume that the current weather type will remain for the next preset number of days, calculate the power change trend for the next preset number of days in combination with the state of charge of the energy storage unit, and control the output power of high priority loads based on the calculation results and state of charge. S6. Based on the state of charge of the energy storage unit and the light intensity, control the tracking mechanism to switch between the stopped tracking state and the started tracking state. S7. The DC power output from the energy storage unit is converted from DC to DC and then supplied to the DC bus. The DC bus then supplies power to high-priority loads and performs dynamic voltage regulation on the DC bus. S8. Obtain the actual output power of the photovoltaic power generation unit, compare the actual output power with the estimated power generation, and identify the current weather type based on the comparison results and in combination with the irradiance and the actual output power of the wind power generation unit; wherein, the judgment threshold for identifying the weather type is dynamically adjusted according to the current season. S9. Based on the identified current weather type and season, execute the corresponding energy regulation strategy; Among them, the energy regulation strategy includes a snow melting control strategy. When the current weather type is identified as snowy, the low-voltage electric heating element attached to the back panel of the photovoltaic power generation unit is energized and heated, and the tilt angle of the photovoltaic power generation unit is adjusted to the anti-snow accumulation tilt angle.

[0009] A wind-solar-storage smart display screen global energy regulation device, used to execute a wind-solar-storage smart display screen global energy regulation method, comprising: Photovoltaic power generation unit, wind power generation unit, energy storage unit, DC-DC converter, DC bus, tracking mechanism, high priority load, low priority load, main control unit, temperature sensor, snow melting unit, and auxiliary control power supply; The output terminals of the photovoltaic power generation unit and the wind power generation unit are connected to the charging terminal of the energy storage unit after being combined through anti-backflow devices; The output of the energy storage unit is connected to the DC bus via a DC-DC converter; The DC bus connects to high-priority loads and low-priority loads respectively; The power supply circuit for high-priority loads does not pass through the switching devices used to disconnect low-priority loads; The snow melting unit includes a low-voltage electric heating element attached to the back panel of the photovoltaic power generation unit. The low-voltage electric heating element is electrically connected to the main control unit and is used to generate heat under the control of the main control unit. The auxiliary control power supply is electrically connected to the main control unit and is used to supply power to the main control unit when the energy storage unit is shut down due to power failure, so as to maintain the low power consumption operation of the main control unit. The main control unit is electrically connected to the photovoltaic power generation unit, wind power generation unit, energy storage unit, DC-DC converter, tracking mechanism, high priority load, low priority load, temperature sensor, snow melting unit and auxiliary control power supply.

[0010] A smart wind-solar-storage display screen, used to execute a method for global energy regulation of the smart wind-solar-storage display screen, comprising: The display module adopts a common cathode drive circuit architecture; A DC input power supply, the input terminal of which is used to connect to the DC bus, and the output terminal of which is connected to the power input terminal of the display module; A passive natural heat dissipation structure is located on the back side of the display module. The passive natural heat dissipation structure does not contain an air-cooled fan. The outer casing is a die-cast, one-piece sealed housing with an IP66 protection rating.

[0011] The present invention has the following beneficial effects: 1. This invention constructs a four-layer progressive global energy regulation system. The first layer is source-side power generation scheduling, which switches the charging and operation status of photovoltaic and wind power generation units according to the light intensity, and dynamically adjusts the light threshold according to the season to improve the comprehensive utilization rate of wind and solar resources, while implementing backflow prevention control to protect power generation equipment. The second layer is load-level power supply, which manages high-priority and low-priority loads according to the state of charge of energy storage units to ensure the core display operates first. The third layer is energy consumption prediction, which uses a localized energy consumption model to calculate the power shortage for the next few days and adjusts the load power in advance to avoid rapid depletion of energy storage under extreme weather conditions. The fourth layer is DC direct supply and snow melting linkage, which uses DC-DC conversion and DC bus power supply to reduce conversion links, and when snow is detected, it links and controls the heating of large tilt angle and low-voltage electric heating elements to actively melt snow, effectively restoring photovoltaic power generation capacity. The four-layer logic makes decisions step by step and operates in coordination, which significantly improves the power supply reliability and adaptability of off-grid wind, solar and energy storage displays in harsh environments such as long cloudy and rainy days and winter snow accumulation. Attached Figure Description

[0012] Figure 1 This is a flowchart of the method of the present invention. Detailed Implementation

[0013] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0014] Example 1 This embodiment provides a method for full-domain energy regulation of a smart display screen based on wind, solar, and energy storage, applied to a pure off-grid integrated wind, solar, and energy storage outdoor system. The system includes a photovoltaic power generation unit, a wind power generation unit, an energy storage unit, a DC-DC converter, a DC bus, a tracking mechanism, high-priority loads, low-priority loads, a main control unit, a temperature sensor, a snow melting unit, and an auxiliary control power supply. The output terminals of the photovoltaic and wind power generation units are connected to the charging terminal of the energy storage unit via backflow prevention devices. The backflow prevention devices are Schottky diodes. The output terminal of the energy storage unit is connected to the DC bus via the DC-DC converter. The DC bus connects to the high-priority and low-priority loads respectively. The power supply circuit of the high-priority loads does not pass through a switching device (a relay) used to disconnect the low-priority loads. The snow melting unit includes a low-voltage heating element attached to the backplate of the photovoltaic power generation unit. The auxiliary control power supply is a small-capacity lithium battery pack connected to the auxiliary power supply terminal of the main control unit, used to maintain low-power operation of the main control unit when the energy storage unit's power is depleted. The main control unit is electrically connected to the above components and performs the following regulation steps. The entire control method is implemented sequentially through four layers of logic working together.

[0015] The first level of control is source-end power generation scheduling. The main control unit executes S1, S2, and S3.

[0016] The main control unit obtains the current date and determines the current season through its built-in clock. Based on the current season, the main control unit determines a first light intensity threshold and a second light intensity threshold. In summer and spring, the first light intensity threshold is 200W / ㎡, and the second light intensity threshold is 50W / ㎡; in autumn and winter, the first light intensity threshold is 150W / ㎡, and the second light intensity threshold is 30W / ㎡. The main control unit acquires the light intensity collected by the light sensor. When the light intensity is higher than the first light intensity threshold, only the photovoltaic power generation unit is activated to charge the energy storage unit, while the charging circuit of the wind power generation unit is disconnected via a relay, and the wind turbine enters idle mode, retaining only monitoring. When the light intensity is lower than the second light intensity threshold, only the wind power generation unit is activated to charge, and the charging circuit of the photovoltaic power generation unit is shut off. When the light intensity is between the first and second light intensity thresholds, both circuits are activated simultaneously for parallel supplementary power. In the backflow prevention control, anti-reverse diodes are connected in series at the output terminals of both the photovoltaic and wind turbines. In terms of software, the main control unit compares the output voltages of the photovoltaic power generation unit and the wind power generation unit in real time. When the voltage of one path is higher than that of the other path and the difference exceeds 0.8V, the higher voltage path is subject to voltage limiting control to prevent backflow of electrical energy.

[0017] The second level of regulation involves tiered power supply to the load. The main control unit executes S4 and S6.

[0018] The main control unit acquires the state of charge (SOC) of the energy storage unit in real time. The high-priority load is the main LED display screen, and the low-priority load is auxiliary lighting equipment. The first SOC threshold is 40%, the second is 20%, and the third is 95%. When the SOC is above 40%, both high-priority and low-priority loads operate normally. When the SOC drops to 40%, the main control unit controls a relay to cut off the power supply to the low-priority load. When the SOC further drops to 20%, the main control unit sends a dimming command to the high-priority load to reduce its output power. The power supply circuit for the high-priority load is directly connected to the DC bus, bypassing the aforementioned relays. According to a preset start-stop schedule, at startup, regardless of the SOC level, the main control unit forcibly connects the power supply circuit for the high-priority load, allowing it to stop operating only when the SOC falls below the minimum operating threshold by 10%. The tracking mechanism is a single-axis pitch tracking mechanism with a self-locking function, employing a worm gear self-locking structure. The entire tracking system is mounted on the existing main support column of the LED screen using clamps, with the micro-wind generator fixed at the top of the same column. When the state of charge (SBC) of the energy storage unit is higher than the third SBC threshold, the main control unit controls the tracking mechanism to stop tracking and maintains the current tilt angle using a self-locking mechanism, while keeping the power supply to the tracking mechanism on. When the SBC drops below 75%, or the light intensity recovers to above the first light threshold for the current season and remains above it for 15 minutes, normal tracking resumes. When the light intensity is lower than the second light threshold for the current season, even if the SBC is not lower than 75%, the tracking mechanism resets to the initial tilt angle at sunrise and stops tracking. When the immediate cut-off command of S4 conflicts with the subsequent third-layer prediction command, the immediate cut-off command of S4 takes priority to ensure power supply to high-priority loads. When the SBC is lower than 10%, a protective cut-off is forcibly executed.

[0019] The third level of control involves energy consumption simulation and prediction. The main control unit executes S5.

[0020] The main control unit has a built-in localized energy consumption simulation model with pre-stored project parameters, including the project location's latitude and longitude, the longest consecutive rainy days in winter (preset 4 days), total photovoltaic installed capacity, wind turbine power per unit, total energy storage capacity, power consumption per unit of high-priority loads, and 12 hours of daily operation. During calculations, the main control unit assumes that the current weather type identified by S8 will remain unchanged for the next 4 days, calculating the difference between power generation and power consumption daily to determine the daily energy storage gap.

[0021] The daily power generation calculation of the localized energy consumption simulation model is performed as follows: Daily photovoltaic (PV) power generation equals the product of the total installed PV capacity, the effective sunshine duration of the day, the PV power generation efficiency coefficient corresponding to the current season, and the PV power generation efficiency coefficient corresponding to the current weather type; daily wind power generation equals the product of the single wind turbine power, the effective wind speed duration of the day, and the wind power generation efficiency coefficient corresponding to the current weather type; the total daily power generation is the sum of daily PV power generation and daily wind power generation. Daily power consumption equals the product of the unit power consumption of high-priority loads in their corresponding operating mode and their daily operating time, plus the product of the unit power consumption of low-priority loads in their corresponding operating state and their daily operating time. Each efficiency coefficient is pre-stored in the main control unit; for example, the PV power generation efficiency coefficient is 0.55 for sunny winter days, 0.2 for cloudy winter days, and 0.4 for cloudy winter days, etc.

[0022] Taking a cloudy winter day as an example, daily calculations are performed. Pre-stored project parameters are: total photovoltaic capacity 4.5kW, wind turbine single-unit power 1kW, total energy storage unit capacity 23kWh, high-priority load power consumption in normal mode is 1050W, operating for 12 hours daily, low-priority load total rated power 300W, operating for 1.5 hours daily. The photovoltaic power generation efficiency coefficient for winter is taken as 0.55, the photovoltaic power generation efficiency coefficient for cloudy winter days is taken as 0.2, and the wind power generation efficiency coefficient for cloudy winter days is taken as 0.4. The effective sunshine duration for cloudy winter days is taken as 4.5 hours, and the effective wind speed duration is taken as 10 hours. The daily photovoltaic power generation is calculated by multiplying 4.5kW, 4.5 hours, 0.55, and 0.2, resulting in 2.23kWh. The daily wind power generation is calculated by multiplying 1kW, 10 hours, and 0.4, resulting in 4.0kWh. The total daily power generation is 6.23kWh. The daily power consumption is calculated as 1050W multiplied by 12 hours plus 300W multiplied by 1.5 hours, resulting in 13.05 kWh. The daily energy storage gap is 6.23 kWh minus 13.05 kWh, resulting in a net consumption of 6.82 kWh, which accounts for 29.7% of the total energy storage unit capacity of 23 kWh.

[0023] The main control unit performs daily rolling calculations, deducting the power consumption ratio corresponding to the energy storage gap each day from the initial state of charge, to estimate the remaining state of charge at the end of the fourth day. If it is predicted that the remaining state of charge will still be higher than the minimum operating threshold by 10% at the end of the fourth day, it is determined to be a mild shortage, and the system maintains the standard full-screen brightness of 6500 cd / m² without any operation. If it is predicted that the remaining state of charge will drop below 10% before the end of the fourth day, it is determined to be a severe shortage, and the output power of high-priority loads is reduced by 30% to 50% in stages, and unnecessary playback periods are shortened.

[0024] Every day after sunrise, the actual photovoltaic power generation is collected and compared with the estimated power generation of the previous day. The actual photovoltaic power generation is divided by the estimated power generation to obtain the correction ratio. Then, the photovoltaic power generation efficiency coefficient corresponding to the current season is multiplied by the correction ratio to obtain the corrected photovoltaic power generation efficiency coefficient, which is used for subsequent calculations.

[0025] The fourth level of control is linked to direct DC power supply and snow melting. The main control unit executes S7, S8, and S9.

[0026] The 48V DC output from the energy storage unit is converted into a stable 48V DC by a DC-DC converter and then supplied to the DC bus, which in turn supplies power to high-priority loads. The DC-DC converter has an efficiency of up to 97%, and the main control unit dynamically adjusts the charging and discharging power to keep the voltage fluctuation of the DC bus within ±0.8V.

[0027] The main control unit acquires the actual output power of the photovoltaic power generation unit and compares it with the estimated power generation. The estimated power generation is calculated by multiplying the total installed photovoltaic capacity, the current real-time irradiance divided by the reference irradiance of 1000 W / m² under standard test conditions, the photovoltaic power generation efficiency coefficient corresponding to the current season, and the photovoltaic power generation efficiency coefficient corresponding to the currently identified weather type. The threshold for identifying the current weather type is dynamically adjusted according to the current season.

[0028] The identification logic is as follows: when the deviation between the actual output power and the estimated power of the photovoltaic power generation unit is within the first deviation range corresponding to the current season, and the light intensity is higher than the first light threshold corresponding to the current season, it is identified as a sunny day.

[0029] When the deviation is within the second deviation range corresponding to the current season, and the light intensity is lower than the second light threshold corresponding to the current season, it is identified as a cloudy day.

[0030] When the actual output power of the photovoltaic power generation unit is continuously lower than the estimated power generation power by more than the first power deviation threshold corresponding to the current season, the main control unit obtains the actual output power and its standard deviation of the wind power generation unit, and makes a judgment based on the ambient temperature detected by the temperature sensor. If the ambient temperature is not lower than the preset temperature threshold, the actual output power of the wind power generation unit is higher than 50% of its rated power, and its standard deviation is higher than 30% of the rated power, then it is identified as a sandstorm. If the ambient temperature is lower than the preset temperature threshold and the standard deviation of the actual output power of the wind power generation unit is less than 15% of the rated power, it is identified as a snowy day.

[0031] A typhoon is identified when, within 30 minutes, the actual output power of a wind power generation unit is consistently above 80% of its rated power for the first 15 minutes, and then suddenly drops to below 5% of its rated power for the next 15 minutes, while simultaneously the actual output power of a photovoltaic power generation unit is detected to decrease synchronously and the decrease exceeds 50% of the estimated power generation.

[0032] Based on the identified weather type and current season, the main control unit executes the corresponding control strategy.

[0033] When snowfall is detected, snow melting linkage control is executed: the main control unit controls the tracking mechanism to adjust the tilt angle of the photovoltaic power generation unit to a 70° anti-snow accumulation tilt angle; simultaneously, the low-voltage electric heating element attached to the back panel of the photovoltaic power generation unit is energized and heated, powered solely by the auxiliary battery. This low-voltage electric heating element is a self-regulating PTC heating cable, maintaining a maximum temperature of 65°C, directly powered by a 48V DC bus, with a laying density of 6 to 8 meters per square meter of back panel. After being energized, the heating cable heats up, and the heat is conducted to the surface of the photovoltaic glass, accelerating the melting of the snow at the bottom. Combined with the large tilt angle, the snow slides off due to gravity. Under these conditions, the actual output power changes of the photovoltaic power generation unit are continuously monitored.

[0034] If the actual output power shows an upward trend within 30 minutes and the increase exceeds 15% of the estimated power generation, the weather identification is considered correct. The 70° tilt angle and heating state are maintained until the actual output power recovers to more than 85% of the estimated power generation. After that, the tilt angle is restored to the target tilt angle controlled by the tracking mechanism and heating is stopped. If there is no upward trend within 30 minutes, the identification is considered incorrect. The tilt angle is directly restored to the target tilt angle and heating is stopped.

[0035] When a sandstorm is detected, the main control unit controls the tracking mechanism to adjust the tilt angle of the photovoltaic power generation units to the initial horizontal tilt angle, reduces the output power of high-priority loads, and keeps low-priority loads off. When a sandstorm occurs in spring, the output power of high-priority loads is reduced to 40% of the normal value; when it occurs in other seasons, it is reduced to 60% of the normal value.

[0036] When a typhoon is detected, the main control unit controls the tracking mechanism to adjust the tilt angle of the photovoltaic power generation unit to the minimum windward tilt angle of 0° and locks the self-locking mechanism, cutting off low-priority loads and reducing the output power of high-priority loads. When the output power of the wind power generation unit drops sharply below the preset shutdown threshold, the wind power generation unit is switched to unloading protection mode.

[0037] When the weather is identified as cloudy and the current season is winter, the main control unit will reduce the output power of high-priority loads by 50% of the normal value; on cloudy days in other seasons, the output power will be reduced by 30% of the normal value.

[0038] The above four-layer control cycle iterates, updating model data every minute to continuously and dynamically optimize the entire energy strategy. When the system shuts down due to power loss in the energy storage unit, the main control unit is powered by the auxiliary control power supply to maintain a low-power operation state, continuously monitoring solar intensity, wind speed, and energy storage unit voltage. When it detects that wind and solar resources have recovered and the voltage has risen back to the allowable closing value, the main control unit controls the closing of the main circuit, restarts the system, and restores all detection and control functions.

[0039] Example 2 This embodiment provides a wind-solar-storage smart display screen with full-domain energy regulation device, including a photovoltaic power generation unit, a wind power generation unit, an energy storage unit, a DC-DC converter, a DC bus, a light tracking mechanism, high-priority loads, low-priority loads, a main control unit, a temperature sensor, a snow melting unit, and an auxiliary control power supply. The photovoltaic power generation unit uses monocrystalline modules with a total installed capacity of 4.5kW; the wind power generation unit is a micro-wind generator with a rated power of 1kW. The energy storage unit is a 15-cell lithium iron phosphate battery pack with a rated voltage of 48V and a total capacity of 23kWh. The batteries use low-temperature modified electrolyte and can still be charged and discharged normally in a -20℃ low-temperature environment. The backflow prevention device is a Schottky diode with a forward voltage drop of 0.4V. The output of the energy storage unit is connected to the 48V DC bus through a DC-DC converter with an efficiency of 97%. The DC bus connects to both the high-priority and low-priority loads. The high-priority load is a common-cathode LED display screen, whose power supply circuit is directly connected to the DC bus, bypassing the relay used to disconnect the low-priority load. The snow melting unit includes a low-voltage electric heating element attached to the back panel of the photovoltaic power generation unit. This low-voltage electric heating element is a self-regulating PTC heating cable with an operating voltage of 48V DC and a maximum maintenance temperature of 65°C. The sheath is made of double-layer fluoroplastic or silicone and is attached using aluminum foil thermal conductive tape and fixing clips at a density of 6 to 8 meters per square meter of back panel. As an alternative, carbon fiber heating wire can also be used as the low-voltage electric heating element, with a laying density of 10 meters per square meter, suitable for large screens in high-altitude and cold regions. The auxiliary control power supply is a small-capacity lithium battery pack connected to the auxiliary power supply terminal of the main control unit. The entire device adopts a single-column fully modular integrated assembly structure, which is divided into an LED screen display module, a photovoltaic tracking array module, and a column-integrated energy storage module. The main control unit is electrically connected to each of the above components and executes the method of Example 1.

[0040] Example 3 This embodiment provides a smart display screen for wind, solar, and energy storage, including a display module, a DC input power supply, a passive natural heat dissipation structure, and a housing. The display module adopts a common cathode drive circuit architecture, with red, green, and blue LEDs sharing a common ground cathode, and is powered by an independent constant current drive chip. The DC input power supply is a 48V DC input switching power supply, whose input terminal is used to connect to an external 48V DC bus, and whose output terminal is connected to the power input terminal of the display module. No AC-DC rectification conversion module is installed inside the screen. The passive natural heat dissipation structure consists of heat sink fins and is located on the back side of the display module, without a fan. The housing is a die-cast, one-piece sealed housing with an IP66 protection rating. The display screen has a peak brightness of 6500 cd / m² and a refresh rate of 7680 Hz. This display screen can execute the method of Embodiment 1.

Claims

1. A method for global energy regulation of a smart wind-solar-storage display screen, characterized in that, include: S1. Get the current date and determine the current season; S2. Determine the first light threshold and the second light threshold based on the current season; S3. Obtain the light intensity, and switch the charging status of the photovoltaic power generation unit and the wind power generation unit to the energy storage unit according to the light intensity, and perform anti-backflow control on the two output voltages: when the light intensity is higher than the first light threshold, only the photovoltaic power generation unit is activated; when the light intensity is lower than the second light threshold, only the wind power generation unit is activated; when the light intensity is between the first light threshold and the second light threshold, both the photovoltaic power generation unit and the wind power generation unit are activated simultaneously. S4. Obtain the state of charge of the energy storage unit, and control the power supply of high-priority loads and low-priority loads according to the state of charge; S5. Obtain project parameters, assume that the current weather type will remain for the next preset number of days, calculate the power change trend for the next preset number of days in combination with the state of charge of the energy storage unit, and control the output power of the high priority load based on the calculation results and the state of charge. S6. Based on the state of charge of the energy storage unit and the light intensity, control the light tracking mechanism to switch between the stopped light tracking state and the started light tracking state. S7. The DC power output from the energy storage unit is converted from DC to DC and then supplied to the DC bus. The DC bus then supplies power to the high-priority load and performs dynamic voltage regulation on the DC bus. S8. Obtain the actual output power of the photovoltaic power generation unit, compare the actual output power with the estimated power generation, and identify the current weather type based on the comparison result and in combination with the light intensity and the actual output power of the wind power generation unit; wherein, the judgment threshold for identifying the weather type is dynamically adjusted according to the current season. S9. Execute the corresponding energy regulation strategy based on the identified current weather type and the current season.

2. The method according to claim 1, characterized in that, The identification of the current weather type described in S8 includes: When the deviation between the actual output power of the photovoltaic power generation unit and the estimated power generation is within a first deviation range and the light intensity is higher than the first light threshold, it is identified as a sunny day. When the deviation value is within the second deviation range and the light intensity is lower than the second light threshold, it is identified as a cloudy day. When the actual output power of the photovoltaic power generation unit is continuously lower than the estimated power generation power by a deviation value exceeding the first power deviation threshold, the actual output power and its standard deviation of the wind power generation unit are obtained: if the actual output power of the wind power generation unit is higher than the first power threshold and its standard deviation is higher than the first wind speed fluctuation threshold, it is identified as a sandstorm; if the ambient temperature is lower than the preset temperature threshold and the standard deviation is lower than the second wind speed fluctuation threshold, it is identified as a snowy day. If, within a preset time period, the actual output power of the wind power generation unit is continuously higher than the preset power threshold in the first time period and then suddenly drops below the preset shutdown threshold in the second time period, and at the same time, the actual output power of the photovoltaic power generation unit is detected to decrease synchronously and the decrease exceeds the second power deviation threshold, it is identified as a typhoon day.

3. The method according to claim 2, characterized in that, In summer and spring, the first light threshold is 200W / ㎡ and the second light threshold is 50W / ㎡; in autumn and winter, the first light threshold is 150W / ㎡ and the second light threshold is 30W / ㎡.

4. The method according to claim 2, characterized in that, When the current weather type is identified as snowy in S9, the snow melting control strategy is executed as follows: The tilt angle of the photovoltaic power generation unit is adjusted to an anti-snow accumulation tilt angle, which is greater than or equal to 60°; The low-voltage heating element is activated to generate heat. During the snow melting process, the actual output power of the photovoltaic power generation unit is continuously monitored. If the actual output power shows an upward trend within the set time window and the increase exceeds the power change threshold, the identification is determined to be correct. The anti-snow accumulation tilt angle and heating state are maintained until the actual output power recovers to the recovery ratio range of the estimated power generation. Then, the tilt angle of the photovoltaic power generation unit is restored to the target tilt angle controlled by the tracking mechanism, and heating is stopped. If the actual output power does not show an upward trend within the set time window, it is determined that the identification is incorrect, the tilt angle of the photovoltaic power generation unit is restored to the target tilt angle controlled by the tracking mechanism, and heating is stopped.

5. The method according to claim 2, characterized in that, When the current weather type identified in S9 is a sandstorm, the energy regulation strategy implemented includes: The tilt angle of the photovoltaic power generation unit is adjusted to the initial horizontal tilt angle, the output power of the high-priority load is reduced, and the low-priority load is kept off. When a sandstorm occurs in spring, the reduction in the output power of the high-priority load is greater than that when a sandstorm occurs in other seasons.

6. The method according to claim 2, characterized in that, When the current weather type identified in S9 is a typhoon day, the energy regulation strategy executed includes: Adjust the tilt angle of the photovoltaic power generation unit to the minimum windward tilt angle and lock the self-locking mechanism of the tracking mechanism to cut off the low-priority load and reduce the output power of the high-priority load; when the output power of the wind power generation unit drops sharply below the preset shutdown threshold, switch the wind power generation unit into the unloading protection state.

7. The method according to claim 2, characterized in that, When the current weather type identified in S9 is cloudy and the current season is winter, the energy regulation strategy includes: increasing the reduction in the output power of the high-priority load.

8. The method according to claim 1, characterized in that, S4 describes controlling the power supply to high-priority and low-priority loads based on the state of charge, including: When the state of charge is higher than the first charge threshold, maintain normal power supply to the high-priority load and the low-priority load; When the state of charge drops to the first charge threshold, the power supply to the low-priority load is cut off; When the state of charge drops to a second charge threshold, the output power of the high-priority load is reduced, where the second charge threshold is lower than the first charge threshold. The method further includes: forcibly activating the power supply circuit of the high-priority load at the power-on time according to a preset timed start-stop schedule; The calculation of the electricity consumption trend within a preset number of days in S5, and the control of the output power of the high-priority load based on the calculation results and the state of charge, include: maintaining the full-screen standard brightness of the high-priority load when a slight power shortage is predicted; reducing the output power of the high-priority load and cutting off the low-priority load when a moderate power shortage is predicted; reducing the output power of the high-priority load in stages and shortening the invalid playback period when a severe power shortage is predicted; collecting the actual photovoltaic power generation after sunrise each day, and correcting the photovoltaic power generation efficiency coefficient corresponding to the current season in subsequent calculations based on the deviation between the actual photovoltaic power generation and the estimated power generation. The control mechanism for switching between a stopped tracking state and a started tracking state as described in S6 includes: when the state of charge is higher than a third charge threshold, controlling the tracking mechanism to enter a stopped tracking state; the third charge threshold is higher than the first charge threshold.

9. A wind-solar-storage smart display screen with global energy regulation device, used to execute the method of any one of claims 1 to 8, characterized in that, include: Photovoltaic power generation unit, wind power generation unit, energy storage unit, DC-DC converter, DC bus, tracking mechanism, high priority load, low priority load, main control unit, temperature sensor, snow melting unit, and auxiliary control power supply; The output terminals of the photovoltaic power generation unit and the wind power generation unit are connected to the charging terminal of the energy storage unit after being combined through anti-backflow devices. The output of the energy storage unit is connected to the DC bus via the DC-DC converter. The DC bus is connected to the high-priority load and the low-priority load respectively; The power supply circuit for the high-priority load does not pass through the switching device used to disconnect the low-priority load; The snow melting unit includes a low-voltage electric heating element attached to the back panel of the photovoltaic power generation unit. The low-voltage electric heating element is electrically connected to the main control unit and is used to generate heat under the control of the main control unit. The auxiliary control power supply is electrically connected to the main control unit and is used to supply power to the main control unit when the energy storage unit is shut down due to power failure, so as to maintain the low power consumption operation state of the main control unit. The main control unit is electrically connected to the photovoltaic power generation unit, the wind power generation unit, the energy storage unit, the DC-DC converter, the light tracking mechanism, the high-priority load, the low-priority load, the temperature sensor, the snow melting unit, and the auxiliary control power supply.

10. A smart display screen for wind, solar, and energy storage, used to perform the method according to any one of claims 1 to 8, characterized in that, include: The display module adopts a common cathode driving circuit architecture; A DC input power supply, wherein the input terminal of the DC input power supply is used to connect to a DC bus, and the output terminal of the DC input power supply is connected to the power input terminal of the display module; A passive natural heat dissipation structure is disposed on the back side of the display module, and the passive natural heat dissipation structure does not contain a fan; The outer casing is a die-cast, one-piece sealed housing with an IP66 protection rating.

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