Remote monitoring platform for off-grid inverter and double-direct-current bus energy storage system

Abstract

The invention relates to the technical field of energy storage power supplies, in particular to an off-grid inverter and double-direct-current bus energy storage system remote monitoring platform which comprises a wireless communication unit, a controller, a voltage detection unit and a switch unit. The wireless communication unit receives electric equipment operation state information, including power and preset duration, sent by terminal equipment, and transmits the information to the controller. The controller calculates the required total electricity consumption according to the information and adjusts the inclination angle of the photovoltaic cell panel so as to match the actual demand, ensure the consistency of the photovoltaic generating capacity and the electricity consumption and avoid energy waste or insufficiency, the voltage detection unit monitors the port voltage of the first energy storage power supply in real time, and when the voltage is lower than a preset threshold value, the first energy storage power supply is switched on. And sending a conduction signal to the controller. The controller automatically conducts the power supply connection between the second energy storage power supply and the off-grid inverter through the switch unit, and guarantees the power supply continuity.

Description

Technical Field

[0001] This invention relates to the field of energy storage power technology, and in particular to a remote monitoring platform for an off-grid inverter and a dual DC bus energy storage system. Background Technology

[0002] With the widespread application of renewable energy, off-grid photovoltaic (PV) power generation systems have been widely used in remote areas, emergency power supply, and independent microgrids due to their environmental friendliness and flexibility. However, traditional off-grid inverters and energy storage systems typically use PV panels with fixed angles or adjust power generation solely based on sunlight conditions, failing to dynamically adjust power generation according to the actual operating status of the electrical equipment (such as power demand and power consumption duration). This can lead to PV power generation far exceeding actual demand, resulting in overcharging of energy storage batteries and energy waste; or insufficient power generation, causing rapid depletion of the energy storage power supply and affecting power continuity.

[0003] Furthermore, existing monitoring platforms are mostly limited to collecting basic parameters such as voltage and current, lacking the ability to comprehensively analyze the operating status of electrical equipment. For example, users cannot obtain real-time total energy consumption data of electrical equipment through terminal devices, and thus cannot proactively adjust the power generation strategy of photovoltaic panels, making it difficult to achieve a dynamic balance between power generation and consumption. Summary of the Invention

[0004] The main objective of this invention is to provide a remote monitoring platform for off-grid inverters and dual DC bus energy storage systems. This platform aims to solve the technical problem that existing off-grid inverters and energy storage systems typically use photovoltaic panels with fixed angles or adjust power generation based solely on sunlight conditions, failing to dynamically adjust power generation in conjunction with the actual operating status of the electrical equipment.

[0005] To achieve the above objectives, the present invention provides a remote monitoring platform for an off-grid inverter and a dual DC bus energy storage system, the platform comprising: a wireless communication unit, a controller, a voltage detection unit, and a switching unit; The wireless communication unit is connected to the terminal device and the controller, the controller is connected to the photovoltaic panel and the switching unit, the photovoltaic panel is connected to the first energy storage power supply and the second energy storage power supply, the first energy storage power supply is connected to the off-grid inverter through the first DC power supply bus, the second energy storage power supply is connected to the off-grid inverter through the switching unit and the second DC power supply bus, the output terminal of the off-grid inverter is connected to the electrical equipment, and the voltage detection unit is connected to the power supply port of the first energy storage power supply and the controller. The wireless communication unit is used to receive the operating status information of the electrical equipment sent by the terminal device, and transmit the operating status information of the electrical equipment to the controller. The operating status information of the electrical equipment includes the power information of the electrical equipment and the preset power consumption duration information. The controller is used to adjust the tilt angle of the photovoltaic panel according to the operating status information of the electrical equipment, so that the photovoltaic panel outputs the corresponding charging power to the first energy storage power source according to the operating status information of the electrical equipment. The voltage detection unit is used to detect the port voltage of the first energy storage power supply, and output a conduction signal to the controller when the port voltage is lower than a preset voltage threshold. The controller is also configured to connect the power supply between the second energy storage power supply and the off-grid inverter through the switching unit, so that the second energy storage power supply outputs a power supply voltage to the off-grid inverter.

[0006] Optionally, the controller is further configured to obtain the power consumption parameters of the power consumption equipment based on the operating status information of the power consumption equipment, and generate a power consumption model of the power consumption equipment, wherein the power consumption model is a power consumption prediction model function about the time series, used to predict the power consumption of the power consumption equipment based on time. The target charging power of the photovoltaic panel is determined based on the power consumption prediction model function, and the tilt angle of the photovoltaic panel is adjusted based on the target charging power.

[0007] Optionally, the electricity consumption prediction model function is:

[0008] In the formula, For time-based power consumption of electrical equipment, This refers to the non-periodic variation of electricity consumption over time. This refers to the periodic variation of electricity consumption over time. This refers to the additional variation in electricity consumption at specific time points. This is the error term, used to cover unforeseen fluctuations in electricity consumption; in, In the formula, The growth rate of electricity consumption For growth rate The change For bias, The change in bias is used to make The interval is continuous; all the above parameters were obtained after training a deep learning network; among them... It is an indicator function used to define the direction of the growth rate based on multiple time points t1, t2...tj... of the time series t.

[0009] Optionally, the indicator function is:

[0010] The formula for calculating the periodic variation of electricity consumption over time is as follows:

[0011] In the formula, The period length is set according to the electrical characteristics of the electrical equipment, and n is the depth of the series decomposition. as well as The weighting coefficients are obtained by deep learning fitting of the electricity consumption parameters; For specific time points in a time series, the user manually inputs these specific time points, and the data is then processed through a deep learning network. Fitting.

[0012] Optionally, the tilt angle of the photovoltaic panel includes the latitudinal tilt angle and the longitudinal tilt angle of the photovoltaic panel; The controller is also used to obtain the actual charging power output by the photovoltaic panel after adjusting the tilt angle of the photovoltaic panel. If the actual charging power output by the photovoltaic panel is lower than the target charging power, the controller adjusts the latitudinal tilt angle and the longitudinal tilt angle of the photovoltaic panel so that the photovoltaic panel vertically tracks the sun.

[0013] Optionally, adjusting the latitudinal and meridional tilt angles of the photovoltaic panel to make the photovoltaic panel vertically track the sun includes: Obtain the output power of the solar cell arrays on both sides of the latitudinal edge and the solar cell arrays on both sides of the longitudinal edge of the photovoltaic panel; If the output power of the solar cell arrays on both sides of the latitudinal edge of the photovoltaic panel is not equal, the latitudinal tilt angle of the photovoltaic panel is adjusted. If the output power of the solar cell arrays on both sides of the meridional edge of the photovoltaic panel is not equal, the meridional tilt angle of the photovoltaic panel is adjusted. The adjustment speed of the photovoltaic panel is determined according to the difference in output power of the solar cell arrays on both sides. The larger the difference, the faster the adjustment speed. After adjustment, if the output power of all solar cell arrays in the photovoltaic panel is equal, it is determined that the photovoltaic panel is vertically tracking the sun.

[0014] Optionally, after adjusting the latitudinal and meridional tilt angles of the photovoltaic panel to ensure that the photovoltaic panel vertically tracks the sun, the method further includes: The actual charging power output by the photovoltaic panel is obtained again. If the actual charging power output by the photovoltaic panel is lower than the target charging power, the power supply connection between the second energy storage power supply and the off-grid inverter is turned on through the switching unit, so that the second energy storage power supply outputs power voltage to the off-grid inverter.

[0015] Optionally, the platform further includes: a power plant monitoring unit; The power station monitoring unit is connected to the wireless communication unit; The power station monitoring unit is used to collect real-time status information of the photovoltaic power station, including the power generation of the photovoltaic panels and the remaining power of the energy storage power supply; when the power generation of the photovoltaic panels and the remaining power of the energy storage power supply do not meet the predicted power demand of the electrical equipment, the corresponding power consumption warning signal is output to the terminal device through the wireless communication unit. The terminal device is used to display a power supply priority list of electrical devices when it receives the power consumption warning signal, and to allow the user to set the electrical devices to be turned off, have their power consumption limited, or be completely turned off according to the power supply priority list.

[0016] Optionally, the voltage detection unit includes: a first resistor, a first comparator, and a second resistor; Wherein, the first end of the first resistor is connected to the power supply port of the first energy storage power source, the second end of the first resistor is connected to the inverting input of the first comparator, the non-inverting input of the first comparator is connected to the first reference power source, the output of the first comparator is connected to the first end of the second resistor, and the second end of the second resistor is connected to the controller.

[0017] Optionally, the switching unit includes: a third resistor and a first switching transistor; The first end of the third resistor is connected to the controller, the second end of the third resistor is connected to the control terminal of the first switching transistor, the input terminal of the first switching transistor is connected to the second energy storage power supply, and the output terminal of the first switching transistor is connected to the off-grid inverter.

[0018] This invention discloses a remote monitoring platform for an off-grid inverter and a dual DC bus energy storage system. The platform includes a wireless communication unit, a controller, a voltage detection unit, and a switching unit. The wireless communication unit is connected to a terminal device and the controller. The controller is connected to a photovoltaic panel and the switching unit. The photovoltaic panel is connected to a first energy storage power source and a second energy storage power source. The first energy storage power source is connected to the off-grid inverter via a first DC power supply bus. The second energy storage power source is connected to the off-grid inverter via the switching unit and a second DC power supply bus. The output terminal of the off-grid inverter is connected to the user equipment. The voltage detection unit is connected to the power supply port of the first energy storage power source and the controller. The wireless communication unit receives the user equipment operating status information sent by the terminal device and transmits this information to the controller. The user equipment operating status information includes user equipment power information and preset power consumption duration information. The controller adjusts the tilt angle of the photovoltaic panel according to the user equipment operating status information, so that the photovoltaic panel outputs corresponding charging power to the first energy storage power source based on the user equipment operating status information. The voltage detection unit is used to detect the port voltage of the first energy storage power supply and output a conduction signal to the controller when the port voltage is lower than a preset voltage threshold. The controller is also used to connect the power supply between the second energy storage power supply and the off-grid inverter through the switching unit, so that the second energy storage power supply outputs power voltage to the off-grid inverter. In this invention, the controller calculates the required total power consumption based on the operating status information of the electrical equipment sent by the terminal device, including power information and preset power consumption duration information. Then, the controller adjusts the tilt angle of the photovoltaic panel so that the photovoltaic panel can output the corresponding charging power to the first energy storage power supply according to the actual demand. This ensures that the photovoltaic power generation matches the actual demand of the electrical equipment, avoiding energy waste or insufficiency. Furthermore, through the wireless communication unit, the user can update the operating status information of the electrical equipment at any time, and the controller will dynamically adjust the power generation strategy of the photovoltaic panel according to the latest information to ensure that the power generation is always consistent with the power consumption. Secondly, the voltage detection unit monitors the port voltage of the first energy storage power supply in real time and sends a conduction signal to the controller when the voltage is lower than a preset threshold. Upon receiving the signal, the controller automatically connects the second energy storage power source to the off-grid inverter via the switching unit, achieving seamless switching. This ensures that the second energy storage power source can promptly intervene when the first energy storage power source is low on power, guaranteeing continuous power supply. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the first embodiment of the remote monitoring platform for the off-grid inverter and dual DC bus energy storage system of the present invention; Figure 2 This is a schematic diagram of the structure of the second embodiment of the remote monitoring platform for the off-grid inverter and dual DC bus energy storage system of the present invention; Figure 3 This is a flowchart illustrating the steps of adjusting the latitudinal and longitudinal tilt angles of the photovoltaic panels in the remote monitoring platform for the off-grid inverter and dual DC bus energy storage system of the present invention.

[0020] Description of Figure Numbers:

[0021] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0023] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0024] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0025] This invention provides a remote monitoring platform for off-grid inverters and dual DC bus energy storage systems, referring to... Figure 1 As shown, Figure 1This is a structural block diagram of the first embodiment of the remote monitoring platform for off-grid inverters and dual DC bus energy storage systems of the present invention. The remote monitoring platform for off-grid inverters and dual DC bus energy storage systems of the present invention includes: a wireless communication unit 10, a controller 20, a voltage detection unit 30, and a switching unit 40; The wireless communication unit 10 is connected to the terminal device and the controller 20, respectively. The controller 20 is connected to the photovoltaic panel and the switching unit 40. The photovoltaic panel is connected to the first energy storage power supply and the second energy storage power supply, respectively. The first energy storage power supply is connected to the off-grid inverter through the first DC power supply bus. The second energy storage power supply is connected to the off-grid inverter through the switching unit 40 and the second DC power supply bus. The output terminal of the off-grid inverter is connected to the electrical equipment. The voltage detection unit 30 is connected to the power supply port of the first energy storage power supply and the controller 20, respectively.

[0026] It should be understood that photovoltaic (PV) panels are used to convert solar energy into electrical energy to charge the first and second energy storage power sources. They can also adjust their tilt angle according to instructions from controller 20 to optimize sunlight reception efficiency and increase power generation. The PV panel includes solar panels, a support frame, an adjustment mechanism, and a control circuit. The control circuit receives instructions from controller 20 and drives the adjustment mechanism. The first energy storage power source stores the electrical energy generated by the PV panel and supplies power to the off-grid inverter via a first DC power supply bus. The first energy storage power source may consist of a battery bank, a battery management system, and protection circuitry. The second energy storage power source serves as a backup power source, supplying power to the off-grid inverter when the first energy storage power source is insufficient, via a second DC power supply bus. The off-grid inverter converts DC power into AC power for use by electrical equipment.

[0027] It should be noted that the wireless communication unit 10 is used to receive the operating status information of the electrical equipment sent by the terminal device and transmit this information to the controller 20. The terminal device can send the operating status information of the electrical equipment through a mobile APP or PC. The operating status information includes power information and preset power consumption duration information. The wireless communication unit 10 can also feed back real-time operating data of the system to the terminal device, such as power generation, energy storage status, fault alarms, etc. The controller 20 is used to calculate the total power consumption required based on the operating status information of the electrical equipment received from the wireless communication unit 10, and adjust the tilt angle of the photovoltaic panel accordingly to match the actual demand. The controller 20 can control the angle adjustment motor of the photovoltaic panel to optimize power generation efficiency, and conduct the second energy storage power supply through the switching unit 40 according to the signal of the voltage detection unit 30 to ensure power supply continuity. The voltage detection unit 30 is used to monitor the port voltage of the first energy storage power supply in real time. When the port voltage is detected to be lower than the preset voltage threshold, a conduction signal is generated and sent to the controller 20. The voltage detection unit 30 can convert the analog voltage signal into a digital signal for easy processing by the controller 20. The switching unit 40 is used to connect or disconnect the power supply connection between the second energy storage power source and the off-grid inverter according to the instructions of the controller 20, so as to achieve seamless switching. It can be understood that when the remaining power of the first energy storage power source is low, the port voltage of the first energy storage power source is low. At this time, the remaining power of the first energy storage power source can be determined by detecting the port voltage of the first energy storage power source. When the remaining power of the first energy storage power source is insufficient to meet the total power demand of the electrical equipment, the connection between the second energy storage power source and the off-grid inverter is connected to meet the power demand of the electrical equipment.

[0028] In specific implementation, the wireless communication unit 10 receives power information and preset power consumption duration information of the electrical devices from the terminal device. The controller 20 parses the received data, extracts the power and preset power consumption duration of each electrical device, calculates the total power consumption of the electrical devices based on the power and preset power consumption duration of each device, and determines the target power output of the photovoltaic panel based on the calculated total power consumption. The power generation efficiency of the photovoltaic panel is affected by the angle of sunlight. The controller 20 calculates the optimal tilt angle based on the current time and geographical location to maximize power generation. For adjustable tilt systems, adjustments can be made based on the real-time solar altitude angle and azimuth angle. The controller 20 generates a control signal to adjust the tilt angle of the photovoltaic panel through the motor drive module. The control signal can be a PWM signal or other types of control signals, depending on the type of motor drive module. The controller 20 monitors the port voltage of the first energy storage power source in real time through the voltage detection unit 30 to ensure that it is within the normal range. If the port voltage is lower than a preset threshold, the controller 20 will conduct the second energy storage power source through the switching unit 40 to ensure power supply continuity. Users can update the operating status information of their electrical equipment at any time through terminal devices. The controller 20 dynamically adjusts the tilt angle of the photovoltaic panels based on the latest information to ensure that the power generation is always consistent with the power consumption.

[0029] This embodiment discloses a remote monitoring platform for an off-grid inverter and a dual DC bus energy storage system. The platform includes: a wireless communication unit 10, a controller 20, a voltage detection unit 30, and a switching unit 40. The wireless communication unit 10 is connected to a terminal device and the controller 20. The controller 20 is connected to a photovoltaic panel and the switching unit 40. The photovoltaic panel is connected to a first energy storage power supply and a second energy storage power supply. The first energy storage power supply is connected to the off-grid inverter via a first DC power supply bus. The second energy storage power supply is connected to the off-grid inverter via the switching unit 40 and a second DC power supply bus. The output terminal of the off-grid inverter is connected to the electrical equipment. The voltage detection unit 30 is connected to the power supply port of the first energy storage power supply and the controller 20. The wireless communication unit 10 is used to receive the operating status information of the electrical equipment sent by the terminal device and transmit the operating status information of the electrical equipment to the controller 20. The operating status information of the electrical equipment includes the power information of the electrical equipment and the preset power consumption duration information. The controller 20 is used to adjust the tilt angle of the photovoltaic panel according to the operating status information of the electrical equipment, so that the photovoltaic panel outputs the corresponding charging power to the first energy storage power source according to the operating status information of the electrical equipment. The voltage detection unit 30 is used to detect the port voltage of the first energy storage power source and output a conduction signal to the controller 20 when the port voltage is lower than a preset voltage threshold. The controller 20 is also used to conduct the power supply connection between the second energy storage power source and the off-grid inverter through the switching unit 40, so that the second energy storage power source outputs power voltage to the off-grid inverter. In this invention, the controller 20 calculates the required total power consumption based on the operating status information of the electrical equipment sent by the terminal device, including the power information and the preset power consumption duration information. Then, the controller 20 adjusts the tilt angle of the photovoltaic panel to enable it to output the corresponding charging power to the first energy storage power source according to actual needs. This ensures that the photovoltaic power generation matches the actual needs of the electrical equipment, avoiding energy waste or insufficiency. Furthermore, through the wireless communication unit 10, users can update the operating status information of the electrical equipment at any time. The controller 20 dynamically adjusts the photovoltaic panel's power generation strategy based on the latest information, ensuring that the power generation always matches the power consumption. Next, the voltage detection unit 30 monitors the port voltage of the first energy storage power source in real time and sends a conduction signal to the controller 20 when the voltage falls below a preset threshold. Upon receiving the signal, the controller 20 automatically connects the power supply between the second energy storage power source and the off-grid inverter through the switching unit 40, achieving seamless switching. This ensures that the second energy storage power source can promptly intervene when the first energy storage power source is insufficient, guaranteeing continuous power supply.

[0030] Furthermore, the controller 20 can predict energy storage demand based on the total power consumption (power × duration) of the electrical equipment and make corresponding adjustments in advance. For example, when the first energy storage power source is expected to run out, the second energy storage power source can be started in advance to avoid power outages caused by switching delays. The wireless communication unit 10 can receive and transmit the operating status information of the electrical equipment to the controller 20. The controller 20 performs comprehensive analysis on this information, calculates the total power consumption, and adjusts the power generation strategy of the photovoltaic panels accordingly. Users can view the total energy consumption data of the electrical equipment in real time through terminal devices, thereby proactively adjusting the system's operating parameters. Users can monitor the operating status of the entire system in real time through terminal devices, including the power generation of the photovoltaic panels, the voltage of the energy storage power source, and the output of the off-grid inverter. Once an abnormality is detected, users can immediately take measures to adjust the system, improving its reliability and efficiency.

[0031] Furthermore, the controller 20 is also configured to obtain the power consumption parameters of the power consumption equipment based on the operating status information of the power consumption equipment, and generate a power consumption model of the power consumption equipment. The power consumption model is a power consumption prediction model function about the time series, used to predict the power consumption of the power consumption equipment based on time. The target charging power of the photovoltaic panel is determined based on the power consumption prediction model function, and the tilt angle of the photovoltaic panel is adjusted based on the target charging power.

[0032] It should be noted that, in order to more accurately predict the power consumption of electrical equipment and adjust the tilt angle of the photovoltaic panels accordingly, the controller 20 needs to generate a time-series-based power consumption prediction model. The controller 20 collects operating status information of electrical equipment over a period of time, including power consumption and usage duration; this historical data is used to train the power consumption prediction model. Commonly used time-series prediction models include ARIMA, LSTM (Long Short-Term Memory), and Prophet. For example, an LSTM model can be used for power consumption prediction. After training, a time-series power consumption prediction model function is obtained.

[0033] The electricity consumption prediction model function can be:

[0034] In the formula, For time-based power consumption of electrical equipment, This refers to the non-periodic variation of electricity consumption over time. This refers to the periodic variation of electricity consumption over time. This refers to the additional variation in electricity consumption at specific time points. This is the error term, used to cover unforeseen fluctuations in electricity consumption; It should be noted that the aperiodic variation portion represents the long-term trend of electricity consumption over time. This portion reflects the overall growth or decline trend of electricity consumption. The periodic variation portion represents the periodic changes in electricity consumption over time. This portion typically reflects the regular daily, weekly, or yearly changes in electricity consumption. The additional variation portion at specific time points represents the additional changes in electricity consumption at certain specific time points (such as holidays, special events, etc.). This portion typically reflects unconventional electricity consumption behavior. The error term represents unpredictable fluctuations in electricity consumption. This portion is usually random and reflects all factors that the model cannot fully capture.

[0035] in, In the formula, The growth rate of electricity consumption For growth rate The change For bias, The change in bias is used to make The interval is continuous; all the above parameters were obtained after training a deep learning network; among them... It is an indicator function used to define the direction of the growth rate based on multiple time points t1, t2...tj... of the time series t.

[0036] The indicator function is:

[0037] It should be noted that the electricity consumption growth rate represents the rate at which electricity consumption increases over time. This parameter can be linear or non-linear, depending on the trend of the data. The change in the growth rate represents how the growth rate changes over time. This parameter reflects the trend of the growth rate itself. The bias represents the initial or baseline value of electricity consumption. This parameter can be a constant or a function that changes slowly over time. The change in the bias represents how the bias changes over time. This parameter ensures that the non-periodic variation of electricity consumption in the time series is continuous across different time periods. The indicator function is used to define the direction of the growth rate based on multiple time points t1, t2...tj... of the time series t. This function is usually piecewise and can change the direction of the growth rate based on specific time points, such as changing the direction of the growth rate based on the indicator function mentioned above.

[0038] The formula for calculating the periodic variation of electricity consumption over time is as follows:

[0039] In the formula, The period length is set according to the electrical characteristics of the electrical equipment, and n is the depth of the series decomposition. as well as The weighting coefficients are obtained by deep learning fitting of the electricity consumption parameters; For specific time points in a time series, the user manually inputs these specific time points, and the data is then processed through a deep learning network. Fitting.

[0040] It should be noted that the cycle length represents the length of a complete cycle of electricity consumption, and the depth of the series decomposition represents the number of terms in the Fourier series. The depth of the series decomposition determines the complexity and fitting accuracy of the model. The weight coefficients represent the weight coefficients of each term in the Fourier series. These coefficients are obtained through fitting using a deep learning network and reflect the contributions of different frequency components. The additional changes in electricity consumption at specific time points represent specific time points in the time series, which are manually entered by the user and usually represent certain specific events or holidays.

[0041] Furthermore, in this embodiment of the invention, the tilt angle of the photovoltaic panel includes the latitudinal tilt angle and the longitudinal tilt angle of the photovoltaic panel. The controller 20 is also used to obtain the actual charging power output by the photovoltaic panel after adjusting the tilt angle of the photovoltaic panel. If the actual charging power output by the photovoltaic panel is lower than the target charging power, the controller adjusts the latitudinal tilt angle and the longitudinal tilt angle of the photovoltaic panel so that the photovoltaic panel vertically tracks the sun.

[0042] It should be noted that the latitudinal tilt angle is the tilt angle of the photovoltaic panel relative to the horizontal plane, typically used to adjust the altitude angle of the panel relative to the sun. The meridional tilt angle is the tilt angle of the photovoltaic panel relative to the north-south direction, typically used to adjust the azimuth angle of the panel relative to the sun. The controller 20 calculates the ideal latitudinal and meridional tilt angles based on the current time and geographical location, ensuring the photovoltaic panel vertically tracks the sun. Initial settings can be based on astronomical algorithms or a preset angle table. After adjusting the tilt angle of the photovoltaic panel, the controller 20 obtains the actual charging power output of the photovoltaic panel through sensors. The actual charging power can be measured by current and voltage sensors. The controller 20 compares the actual charging power with the target charging power. The target charging power is a preset value based on current illumination conditions and system requirements. If the actual charging power is lower than the target charging power, the controller 20 will adjust the latitudinal and meridional tilt angles of the photovoltaic panel to increase the charging power. The adjustment process can be achieved by increasing or decreasing the latitudinal tilt angle to adjust the altitude angle of the panel relative to the sun. For example, if the solar altitude angle is high, the zonal tilt angle can be decreased; if the solar altitude angle is low, the zonal tilt angle can be increased. The meridional tilt angle can be increased or decreased to adjust the azimuth angle between the solar panel and the sun. For example, if the sun is in the east, the meridional tilt angle can be increased; if the sun is in the west, the meridional tilt angle can be decreased.

[0043] Furthermore, referring to Figure 3 The adjustment of the latitudinal and meridional tilt angles of the photovoltaic panel to make the photovoltaic panel vertically track the sun includes: Obtain the output power of the solar cell arrays on both sides of the latitudinal edge and the solar cell arrays on both sides of the longitudinal edge of the photovoltaic panel; If the output power of the solar cell arrays on both sides of the latitudinal edge of the photovoltaic panel is not equal, the latitudinal tilt angle of the photovoltaic panel is adjusted. If the output power of the solar cell arrays on both sides of the meridional edge of the photovoltaic panel is not equal, the meridional tilt angle of the photovoltaic panel is adjusted. The adjustment speed of the photovoltaic panel is determined according to the difference in output power of the solar cell arrays on both sides. The larger the difference, the faster the adjustment speed. After adjustment, if the output power of all solar cell arrays in the photovoltaic panel is equal, it is determined that the photovoltaic panel is vertically tracking the sun.

[0044] It's important to note that the output power of the solar cells on both sides of the latitudinal (north-south) edge and the meridional (east-west) edge of the photovoltaic panel is measured. If the output power of the solar cells on both sides of the latitudinal edge is unequal, it means the photovoltaic panel is not perfectly perpendicular to the sun in the latitudinal direction. Adjust the latitudinal tilt angle to make the output power on both sides more equal. The specific adjustment speed depends on the difference in output power between the two sides; the larger the difference, the faster the adjustment. Similarly, if the output power of the solar cells on both sides of the meridional edge is unequal, it means the photovoltaic panel is not perfectly perpendicular to the sun in the meridional direction. Adjust the meridional tilt angle to make the output power on both sides more equal. The specific adjustment speed depends on the difference in output power between the two sides; the larger the difference, the faster the adjustment. After adjustment, if the output power of all solar cells in the photovoltaic panel is equal, it means the photovoltaic panel has achieved vertical tracking of the sun. If inequalities still exist, continue adjusting until the output power of all solar cells is equal.

[0045] Furthermore, after adjusting the latitudinal and meridional tilt angles of the photovoltaic panel to ensure that the photovoltaic panel vertically tracks the sun, the method further includes: The actual charging power output by the photovoltaic panel is obtained again. If the actual charging power output by the photovoltaic panel is lower than the target charging power, the power supply connection between the second energy storage power supply and the off-grid inverter is turned on through the switching unit 40, so that the second energy storage power supply outputs power voltage to the off-grid inverter.

[0046] It should be noted that after adjusting the tilt angle of the photovoltaic panels, the controller 20 again obtains the actual charging power output of the photovoltaic panels through sensors. The actual charging power is compared with the preset target charging power. If the actual charging power is still lower than the target charging power, the next step is executed. The power supply connection between the second energy storage power source and the off-grid inverter is established through the switching unit 40: if the actual charging power is lower than the target charging power, the controller 20 will establish the power supply connection between the second energy storage power source and the off-grid inverter through the switching unit 40. In this way, the second energy storage power source will output power voltage to the off-grid inverter to supplement the system's power demand.

[0047] Reference Figure 2 , Figure 2 This is a schematic diagram of the structure of the second embodiment of the remote monitoring platform for off-grid inverter and dual DC bus energy storage system of the present invention; based on the above first embodiment, a second embodiment of the remote monitoring platform for off-grid inverter and dual DC bus energy storage system of the present invention is proposed.

[0048] Furthermore, in this embodiment, the platform further includes: a power plant monitoring unit 50; The power station monitoring unit 50 is connected to the wireless communication unit 10; The power station monitoring unit 50 is used to collect real-time status information of the photovoltaic power station, including the power generation of the photovoltaic panels and the remaining power of the energy storage power supply; when the power generation of the photovoltaic panels and the remaining power of the energy storage power supply do not meet the predicted power demand of the electrical equipment, the corresponding power consumption warning signal is output to the terminal device through the wireless communication unit 10. The terminal device is used to display a power supply priority list of electrical devices when it receives the power consumption warning signal, and to allow the user to set the electrical devices to be turned off, have their power consumption limited, or be completely turned off according to the power supply priority list.

[0049] It should be noted that the power station monitoring unit 50 collects real-time data on the power generation of the photovoltaic panels and the remaining power of the energy storage system through sensors and data acquisition equipment. The collected data is transmitted to the central control system or cloud server for processing via the wireless communication unit 10. The central control system or cloud server predicts the electricity demand for a future period based on historical electricity consumption data, weather forecasts, time, and other factors. The collected data on the power generation of the photovoltaic panels and the remaining power of the energy storage system are compared with the predicted electricity demand. If the actual power generation and the remaining power of the energy storage system are insufficient to meet the predicted electricity demand, an electricity consumption warning signal is generated. The electricity consumption warning signal is sent to the terminal device via the wireless communication unit 10. After receiving the electricity consumption warning signal, the terminal device displays a power supply priority list of the electrical equipment. The power supply priority list can be sorted based on the importance and energy consumption of the equipment; for example, important equipment (such as refrigerators and medical equipment) is listed first, and non-important equipment (such as entertainment equipment) is listed later. Users can choose to turn off some equipment, limit the power consumption of some equipment, or completely turn off all non-important equipment according to the power supply priority list. The user's settings are fed back to the central control system or cloud server via the wireless communication unit 10 so that corresponding control operations can be executed.

[0050] In this embodiment, optionally, the voltage detection unit 30 includes: a first resistor R1, a first comparator V1, and a second resistor R2; Wherein, the first end of the first resistor R1 is connected to the power supply port of the first energy storage power source, the second end of the first resistor R1 is connected to the inverting input of the first comparator V1, the non-inverting input of the first comparator V1 is connected to the first reference power source VA, the output of the first comparator V1 is connected to the first end of the second resistor R2, and the second end of the second resistor R2 is connected to the controller 20.

[0051] It should be noted that the voltage of the first energy storage power source is divided by the first resistor R1 to ensure that the voltage input to the comparator is within a reasonable range. The first comparator V1 compares the divided voltage with a reference voltage to determine whether the voltage of the energy storage power source is lower or higher than the reference voltage. The output signal of the first comparator V1 is transmitted to the controller 20 through the second resistor R2, and the controller 20 performs corresponding processing and control based on the signal. By monitoring the voltage of the energy storage power source in real time, abnormal voltage conditions can be detected in a timely manner, allowing for appropriate measures to be taken.

[0052] Furthermore, the switching unit 40 includes: a third resistor R3 and a first switching transistor Q1; The first end of the third resistor R3 is connected to the controller 20, the second end of the third resistor R3 is connected to the control terminal of the first switch Q1, the input terminal of the first switch Q1 is connected to the second energy storage power supply, and the output terminal of the first switch Q1 is connected to the off-grid inverter.

[0053] It should be noted that the third resistor R3 is mainly used for current limiting and protecting the control terminal of the first switching transistor Q1. It limits the current from the controller 20 output to the control terminal of the first switching transistor Q1, preventing excessive current from damaging the control terminal. Through the third resistor R3, it is ensured that the signal output by the controller 20 can safely drive the first switching transistor Q1, while avoiding damage to the transistor due to excessive current. The first switching transistor Q1 can be an electronic switch, such as a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) or a BJT (Bipolar Junction Transistor). Its main function is to turn on or off the connection between the second energy storage power supply and the off-grid inverter based on the signal from the controller 20. When the controller 20 outputs a high-level signal, it is transmitted to the control terminal of the first switching transistor Q1 through the third resistor R3, turning on Q1. At this time, the voltage of the second energy storage power supply can be transmitted to the off-grid inverter through the first switching transistor Q1. When the controller 20 outputs a low-level signal, there is insufficient voltage at the control terminal of the first switching transistor Q1, and Q1 is in the off state, disconnecting the connection between the second energy storage power supply and the off-grid inverter.

[0054] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A remote monitoring platform for an off-grid inverter and a dual DC bus energy storage system, characterized in that, The platform includes: a wireless communication unit, a controller, a voltage detection unit, and a switching unit; The wireless communication unit is connected to the terminal device and the controller, the controller is connected to the photovoltaic panel and the switching unit, the photovoltaic panel is connected to the first energy storage power supply and the second energy storage power supply, the first energy storage power supply is connected to the off-grid inverter through the first DC power supply bus, the second energy storage power supply is connected to the off-grid inverter through the switching unit and the second DC power supply bus, the output terminal of the off-grid inverter is connected to the electrical equipment, and the voltage detection unit is connected to the power supply port of the first energy storage power supply and the controller. The wireless communication unit is used to receive the operating status information of the electrical equipment sent by the terminal device, and transmit the operating status information of the electrical equipment to the controller. The operating status information of the electrical equipment includes the power information of the electrical equipment and the preset power consumption duration information. The controller is used to adjust the tilt angle of the photovoltaic panel according to the operating status information of the electrical equipment, so that the photovoltaic panel outputs the corresponding charging power to the first energy storage power source according to the operating status information of the electrical equipment. The voltage detection unit is used to detect the port voltage of the first energy storage power supply, and output a conduction signal to the controller when the port voltage is lower than a preset voltage threshold. The controller is also configured to connect the power supply between the second energy storage power supply and the off-grid inverter through the switching unit, so that the second energy storage power supply outputs a power supply voltage to the off-grid inverter.

2. The remote monitoring platform for off-grid inverters and dual DC bus energy storage systems as described in claim 1, characterized in that, The controller is further configured to obtain the power consumption parameters of the power consumption equipment based on the operating status information of the power consumption equipment, and generate a power consumption model of the power consumption equipment. The power consumption model is a power consumption prediction model function about the time series, used to predict the power consumption of the power consumption equipment based on time. The target charging power of the photovoltaic panel is determined based on the power consumption prediction model function, and the tilt angle of the photovoltaic panel is adjusted based on the target charging power.

3. The remote monitoring platform for off-grid inverters and dual DC bus energy storage systems as described in claim 2, characterized in that, The electricity consumption prediction model function is: In the formula, For time-based power consumption of electrical equipment, This refers to the non-periodic variation of electricity consumption over time. This refers to the periodic variation of electricity consumption over time. This refers to the additional variation in electricity consumption at specific time points. This is the error term, used to cover unforeseen fluctuations in electricity consumption; in, In the formula, The growth rate of electricity consumption For growth rate The change For bias, The change in bias is used to make The interval is continuous; all the above parameters were obtained after training a deep learning network; among them... It is an indicator function used to define the direction of the growth rate based on multiple time points t1, t2...tj... of the time series t.

4. The remote monitoring platform for off-grid inverters and dual DC bus energy storage systems as described in claim 3, characterized in that, The indicator function is: The formula for calculating the periodic variation of electricity consumption over time is as follows: In the formula, The period length is set according to the electrical characteristics of the electrical equipment, and n is the depth of the series decomposition. as well as The weighting coefficients are obtained by deep learning fitting of the electricity consumption parameters; For specific time points in a time series, the user manually inputs these specific time points, and the data is then processed through a deep learning network. Fitting.

5. The remote monitoring platform for off-grid inverters and dual DC bus energy storage systems as described in claim 2, characterized in that, The tilt angle of the photovoltaic panel includes the latitudinal tilt angle and the longitudinal tilt angle. The controller is also used to obtain the actual charging power output by the photovoltaic panel after adjusting the tilt angle of the photovoltaic panel. If the actual charging power output by the photovoltaic panel is lower than the target charging power, the controller adjusts the latitudinal tilt angle and the longitudinal tilt angle of the photovoltaic panel so that the photovoltaic panel vertically tracks the sun.

6. The remote monitoring platform for off-grid inverters and dual DC bus energy storage systems as described in claim 5, characterized in that, Adjusting the latitudinal and meridional tilt angles of the photovoltaic panel to ensure that the photovoltaic panel vertically tracks the sun includes: Obtain the output power of the solar cell arrays on both sides of the latitudinal edge and the solar cell arrays on both sides of the longitudinal edge of the photovoltaic panel; If the output power of the solar cell arrays on both sides of the latitudinal edge of the photovoltaic panel is not equal, the latitudinal tilt angle of the photovoltaic panel is adjusted. If the output power of the solar cell arrays on both sides of the meridional edge of the photovoltaic panel is not equal, the meridional tilt angle of the photovoltaic panel is adjusted. The adjustment speed of the photovoltaic panel is determined according to the difference in output power of the solar cell arrays on both sides. The larger the difference, the faster the adjustment speed. After adjustment, if the output power of all solar cell arrays in the photovoltaic panel is equal, it is determined that the photovoltaic panel is vertically tracking the sun.

7. The remote monitoring platform for off-grid inverters and dual DC bus energy storage systems as described in claim 6, characterized in that, After adjusting the latitudinal and meridional tilt angles of the photovoltaic panel to ensure that the photovoltaic panel vertically tracks the sun, the method further includes: The actual charging power output by the photovoltaic panel is obtained again. If the actual charging power output by the photovoltaic panel is lower than the target charging power, the power supply connection between the second energy storage power supply and the off-grid inverter is turned on through the switching unit, so that the second energy storage power supply outputs power voltage to the off-grid inverter.

8. The remote monitoring platform for off-grid inverters and dual DC bus energy storage systems as described in claim 2, characterized in that, The platform also includes: a power plant monitoring unit; The power station monitoring unit is connected to the wireless communication unit; The power station monitoring unit is used to collect real-time status information of the photovoltaic power station, including the power generation of the photovoltaic panels and the remaining power of the energy storage power supply; when the power generation of the photovoltaic panels and the remaining power of the energy storage power supply do not meet the predicted power demand of the electrical equipment, the corresponding power consumption warning signal is output to the terminal device through the wireless communication unit. The terminal device is used to display a power supply priority list of electrical devices when it receives the power consumption warning signal, and to allow the user to set the electrical devices to be turned off, have their power consumption limited, or be completely turned off according to the power supply priority list.

9. The remote monitoring platform for off-grid inverters and dual DC bus energy storage systems as described in claim 1, characterized in that, The voltage detection unit includes: a first resistor, a first comparator, and a second resistor; Wherein, the first end of the first resistor is connected to the power supply port of the first energy storage power source, the second end of the first resistor is connected to the inverting input of the first comparator, the non-inverting input of the first comparator is connected to the first reference power source, the output of the first comparator is connected to the first end of the second resistor, and the second end of the second resistor is connected to the controller.

10. The remote monitoring platform for off-grid inverters and dual DC bus energy storage systems as described in claim 1, characterized in that, The switching unit includes: a third resistor and a first switching transistor; The first end of the third resistor is connected to the controller, the second end of the third resistor is connected to the control terminal of the first switching transistor, the input terminal of the first switching transistor is connected to the second energy storage power supply, and the output terminal of the first switching transistor is connected to the off-grid inverter.

Images