Stacked optical base station voltage tracking method, system, device and medium

Abstract

The invention belongs to the technical field of photovoltaic communication base stations, and particularly relates to a voltage tracking method, system and device for a stacked light base station and a medium, and the method comprises the steps: S1, judging whether a switching power supply and a photovoltaic device have a communication function or not, and selecting different methods based on a judgment result to obtain an output voltage value of the switching power supply; s2, testing the photovoltaic equipment to obtain an initial output voltage value of the photovoltaic equipment, an output current value of the photovoltaic equipment and an output voltage value of the switching power supply so as to calculate the resistance of the direct-current cable; s3, calculating and adjusting the initial photovoltaic equipment output voltage value based on the switching power supply output voltage value, the DC cable resistance and the photovoltaic equipment output current value, and obtaining an adjusted photovoltaic equipment output voltage value; and S4, repeatedly executing S1-S3 based on a preset frequency to obtain a plurality of output voltages of the adjusted photovoltaic equipment, judging the change stability of the output voltages of the adjusted photovoltaic equipment, and adjusting the preset frequency based on a judgment result. The accuracy of voltage tracking is improved.

Description

Technical Field

[0001] The present disclosure belongs to the technical field of photovoltaic communication base stations, and in particular relates to a voltage tracking method, system, device and medium for a photovoltaic base station. Background Art

[0002] The stacked solar (DC) power supply system is a low-carbon energy solution that combines a photovoltaic power supply system with a utility-connected communication base station. This system directly converts the DC voltage output by the photovoltaic modules to the DC voltage level required by communication equipment, providing power to the base station equipment.

[0003] In addition to the original switching power supply, the communication base station is powered by photovoltaic equipment. The two power sources are used simultaneously, and the output voltage of the photovoltaic equipment is slightly higher than the output voltage of the switching power supply to ensure that the photovoltaic equipment is given priority power supply. The insufficient power supply of the photovoltaic equipment is supplemented by the switching power supply, maximizing the use of clean energy, increasing the proportion of green electricity in the communication base station, and reducing carbon emissions.

[0004] Because base stations use different battery types, such as lead-acid batteries and lithium iron phosphate batteries, the daily output voltage (float charge voltage) of the switching power supplies in different base stations varies. The switching power supplies in the same base station require regular battery equalization charging, and the output voltage periodically switches between the equalization charge voltage and the float charge voltage. Therefore, the output voltage of the same base station varies over time. The voltage drop in the cable from the photovoltaic equipment to the switching power supply also changes dynamically due to fluctuations in sunlight or load.

[0005] If the PV system's output voltage is too high, the battery may overcharge, shortening its lifespan, or exceed the operating voltage range of communications equipment, impacting its operation. If the PV system's output voltage is too low, the system will be unable to output power, resulting in abandoned light and wasting clean energy. Therefore, PV systems must track the switching power supply system's output voltage in real time and maintain a voltage slightly higher than the switching power supply voltage to ensure prioritized output and stable power supply. Summary of the Invention

[0006] To solve the above problems, the present disclosure provides a voltage tracking method, system, device and medium for a stacked optical base station. It adopts a strategy of dynamically sensing the switching power supply voltage, online calculating / updating the cable voltage drop, superimposing the safety margin, and introducing a control frequency adaptive mechanism, which can achieve accurate tracking of the photovoltaic output voltage to the switching power supply voltage.

[0007] In a first aspect, the present disclosure provides a voltage tracking method for a stacked optical base station, the method comprising: S1, determining whether the switching power supply and the photovoltaic device have communication functions, and selecting different methods to obtain the output voltage value of the switching power supply based on the determination result; S2, testing the photovoltaic device to obtain an initial photovoltaic device output voltage value, a photovoltaic device output current value, and an output voltage value of the switching power supply to calculate a DC cable resistance; S3, calculating and adjusting the initial photovoltaic device output voltage value based on the switching power supply output voltage value, the DC cable resistance, and the photovoltaic device output current value to obtain an adjusted photovoltaic device output voltage value; S4, repeatedly executing S1-S3 based on the preset frequency, obtaining a number of adjusted photovoltaic device output voltages, judging the stability of the output voltage changes of the several adjusted photovoltaic devices, and adjusting the preset frequency based on the judgment result.

[0008] Further, The output voltage value of the switching power supply is obtained based on the judgment result, specifically including: When the switching power supply and the photovoltaic device do not have the communication function, the photovoltaic device turns off the output voltage and measures the output voltage value of the switching power supply; When the switching power supply and the photovoltaic device have communication functions, the photovoltaic device communicates with the switching power supply to read the output voltage value of the switching power supply.

[0009] Further, Calculate the DC cable resistance, including: DC cable resistance = (PV device output voltage - switching power supply output voltage) / PV device output current.

[0010] Further, Calculate and adjust the output voltage of photovoltaic equipment, including: Adjust the output voltage of the photovoltaic equipment = the output voltage of the switching power supply + the resistance of the DC cable × the output current + the priority output voltage difference; Among them, the priority output voltage difference can be set to 0~0.5V.

[0011] Further, Determine the stability of the output voltage changes of several photovoltaic equipment adjustments, including: Collect the output voltage values ​​of the photovoltaic equipment corresponding to several consecutive adjustment cycles, and calculate the absolute difference between the voltage values ​​of adjacent cycles and the voltage fluctuation amplitude; An absolute difference threshold and a voltage fluctuation amplitude threshold are set. If the absolute difference corresponding to M consecutive cycles is less than or equal to the absolute difference threshold and the voltage fluctuation amplitude is less than or equal to the voltage fluctuation amplitude threshold, it is judged that the output voltage change of the photovoltaic device is stable after several adjustments. Otherwise, it is judged that the output voltage change of the photovoltaic device is unstable after several adjustments.

[0012] Further, Adjust the preset frequency based on the judgment result, specifically including: If it is determined that the voltage change is stable, reducing the preset frequency; If it is determined that the voltage change is unstable, the preset frequency is increased.

[0013] In a second aspect, based on the same inventive concept, the present disclosure provides a voltage tracking system for a stacked optical base station, the system comprising: A communication determination module is used to determine whether the switching power supply and the photovoltaic device have communication functions, and obtain the output voltage value of the switching power supply based on the determination result; A resistance calculation module is used to test the photovoltaic device and obtain an initial photovoltaic device output voltage value, a photovoltaic device output current value, and an output voltage value of the switching power supply to calculate the DC cable resistance; a device output adjustment module, configured to calculate and adjust the initial photovoltaic device output voltage value based on the switching power supply output voltage value, the DC cable resistance, and the photovoltaic device output current value, to obtain an adjusted photovoltaic device output voltage value; The frequency adjustment module is used to repeatedly execute the communication judgment module, the resistance calculation module and the device output adjustment module based on a preset frequency to obtain a number of adjusted photovoltaic device output voltages, judge the stability of the changes in the output voltages of the several adjusted photovoltaic devices, and adjust the preset frequency based on the judgment results.

[0014] In a third aspect, the present disclosure further provides an electronic device comprising at least one processor and at least one memory electrically connected; The memory is electrically connected to the processor, wherein the memory stores instructions that can be executed by at least one of the processors, and the instructions are executed by at least one of the processors to enable at least one of the processors to execute any of the methods for voltage tracking of stacked optical base stations as described above.

[0015] In a fourth aspect, the present disclosure further provides a computer storage medium, wherein the computer readable storage medium stores a computer program; When the computer program is executed by a processor, any of the above-mentioned methods for tracking voltage of a stacked optical base station is implemented.

[0016] In a fifth aspect, the present disclosure further provides a computer program product, wherein the computer program product is stored in at least one storage medium; The computer program product includes several instructions for causing at least one electronic device to execute any one of the above-mentioned methods for voltage tracking of a stacked optical base station.

[0017] Compared with the prior art, the present disclosure has the following advantages: 1. Distinguish whether the switching power supply and photovoltaic equipment have communication functions, and use corresponding methods to obtain the output voltage value of the switching power supply. Whether it is direct reading in the scenario where the switching power supply and photovoltaic equipment can communicate normally, or indirect measurement when communication is impossible, it can adapt and have adaptive functions, covering different communication base station equipment configurations, and has a wide range of applicability.

[0018] 2. By calculating the DC cable resistance, the voltage loss caused by the cable resistance is fully considered when adjusting the output voltage of the photovoltaic equipment. The output voltage of the photovoltaic equipment is dynamically adjusted in combination with the output voltage of the switching power supply and the output current of the photovoltaic equipment. Compared with simply setting the output voltage without considering factors such as cable resistance, this can make the output voltage of the photovoltaic equipment more accurate, improve the output voltage matching and the stability of the base station power supply.

[0019] 3. Repeat the process at a preset frequency, adjusting the frequency based on feedback from the stability of the output voltage after several adjustments. The adjustment period can be flexibly adapted to actual voltage fluctuations, with frequent adjustments to ensure stability when fluctuations are large, and reduced frequency to eliminate unnecessary calculations when fluctuations are small. This ensures voltage tracking effectiveness while optimizing resource consumption, improving the method's intelligence and efficiency.

[0020] Other features and advantages of the present disclosure will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present disclosure. The purposes and other advantages of the present disclosure can be realized and obtained by the structures indicated in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A schematic flow chart of a voltage tracking method for a stacked optical base station according to an embodiment of the present disclosure is shown; Figure 2 A schematic diagram of a control flow when a photovoltaic device and a switching power supply cannot communicate according to an embodiment of the present disclosure is shown; Figure 3 A schematic diagram of a control flow when a photovoltaic device and a switching power supply can communicate according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present disclosure without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0024] Figure 1 FIG. 1 shows a flow chart of a voltage tracking method for a stacked optical base station according to an embodiment of the present disclosure, as shown in FIG. Figure 1 As shown, the voltage tracking method of the stacked optical base station of the embodiment of the present disclosure includes: S1, determining whether the switching power supply and the photovoltaic device have a communication function, and selecting a method for obtaining the output voltage value of the switching power supply based on the determination result; In the disclosed embodiment, the communication capability detection may be based on a predefined communication protocol (e.g., Modbus, CAN, RS485) handshake signal or status register reading; For scenarios without communication capabilities, a specific “detection mode” trigger signal (such as a specific IO level or a short shutdown pulse) can be designed to notify the photovoltaic equipment to cooperate in shutting down the output.

[0025] The disclosed embodiments automatically adapt to switching power supplies with different configurations (with or without communication functions) and can be deployed without hardware modification of existing switching power supplies, thereby reducing system upgrade costs and barriers to entry.

[0026] In the embodiment of the present disclosure, step S1 specifically includes: S11, when the switching power supply and the photovoltaic device do not have a communication function, the photovoltaic device turns off the output voltage and measures the output voltage value of the switching power supply; In a non-communication scenario, by actively controlling the photovoltaic equipment to shut down its output, the interference of the photovoltaic side voltage on the measurement is eliminated, ensuring that the measured voltage value is the true output voltage of the pure switching power supply under no-load or light load (only base station load), providing an accurate benchmark for subsequent calculations.

[0027] S12, when the switching power supply and the photovoltaic device have a communication function, the photovoltaic device communicates with the switching power supply to read the output voltage value of the switching power supply.

[0028] When communication capability is available, the output voltage value of the switching power supply can be directly read, which is fast and disturbance-free, and does not require frequent start and stop of photovoltaic equipment, thereby improving system response efficiency and energy utilization.

[0029] In the embodiment of the present disclosure, the specific step of S12 may further include: Use encrypted communication protocol to prevent illegal tampering during data transmission S2, testing the photovoltaic device to obtain an initial photovoltaic device output voltage value, a photovoltaic device output current value, and an output voltage value of the switching power supply to calculate a DC cable resistance; Among them, DC cable resistance = (PV device output voltage value - switching power supply output voltage value) / PV device output current value.

[0030] In the embodiment of the present disclosure, an example of S2 may include: performing measurements at multiple different test current points, calculating an average cable resistance value, or fitting a resistance-current curve.

[0031] In the disclosed embodiment, by measuring and calculating the DC cable resistance online in real time, rather than relying on a fixed cable parameter table or initial measurement values, the line voltage drop caused by factors such as cable length, wire diameter, aging, and temperature changes (affecting resistivity) is accurately compensated to ensure that the photovoltaic output voltage effectively tracks the target value.

[0032] S3, calculating and adjusting the initial photovoltaic device output voltage value based on the switching power supply output voltage value, the DC cable resistance, and the photovoltaic device output current value to obtain an adjusted photovoltaic device output voltage value; Among them, the adjusted output voltage value of the photovoltaic equipment = the output voltage value of the switching power supply + the DC cable resistance × the output current value + the priority output voltage difference; Among them, the priority output voltage difference can be set to 0~0.5V.

[0033] In the disclosed embodiment, the priority output voltage difference can be configured as a dynamic bias. For example: When the system starts or a large load fluctuation is detected, the difference can be temporarily increased (for example, 0.3V to 0.5V) to enhance system stability and avoid circulating current or oscillation; After the system is running stably, the difference can be reduced (e.g. 0V-0.1V) to pursue higher photovoltaic power generation efficiency; The priority output voltage difference may also be adaptively adjusted based on historical data or a load prediction model.

[0034] The embodiment of the present disclosure sets a priority output voltage difference to prevent the photovoltaic voltage from being lower than the switching power supply voltage, which causes the switching power supply to reversely supply power to the photovoltaic device, thereby protecting the switching power supply and ensuring that the photovoltaic device is always in a power generation state. S4, repeatedly executing S1-S3 based on the preset frequency, obtaining a number of adjusted photovoltaic device output voltages, judging the stability of the output voltage changes of the several adjusted photovoltaic devices, and adjusting the preset frequency based on the judgment result.

[0035] In the embodiment of the present disclosure, step S5 specifically includes: S41, collecting the output voltage values ​​of the photovoltaic device corresponding to a number of consecutive adjustment cycles, and calculating the absolute difference between the voltage values ​​of adjacent cycles and the voltage fluctuation amplitude; S42, setting an absolute difference threshold and a voltage fluctuation amplitude threshold. If the absolute difference corresponding to M consecutive cycles is less than or equal to the absolute difference threshold and the voltage fluctuation amplitude is less than or equal to the voltage fluctuation amplitude threshold, it is determined that the output voltage changes of the photovoltaic devices are stable. Otherwise, it is determined that the output voltage changes of the photovoltaic devices are unstable.

[0036] In this embodiment, the consecutive plurality of adjustment cycles is at least five adjustment cycles, and M≥3.

[0037] In this embodiment, the absolute difference threshold is set to 0.2V and the voltage fluctuation amplitude threshold is set to 1%.

[0038] In the embodiment of the present disclosure, step S4 specifically further includes: S43, if it is determined that the voltage change is stable, reducing the preset frequency; S44: If it is determined that the voltage change is unstable, increase the preset frequency.

[0039] In this embodiment, the frequency is adjusted by dynamically configuring the timer parameters of the control system to ensure that the frequency adjustment step does not exceed ±50% of the original frequency.

[0040] The disclosed embodiments solve the problems faced by fixed-frequency control, namely, high frequency and high precision but heavy communication / computing burden that may cause oscillation, and low frequency with light burden but slow response and poor precision, by dynamically adjusting the update frequency of voltage tracking. The embodiment of the present invention automatically reduces the execution frequency when the system is running stably, significantly reducing unnecessary communication traffic, computing resource consumption, and the number of times photovoltaic equipment control instructions are sent, thereby improving the overall efficiency and reliability of the system. When voltage fluctuations are detected, the execution frequency is automatically increased, and tracking accuracy and system stability are quickly restored, ensuring efficient photovoltaic power generation and power quality.

[0041] Figure 2 A schematic diagram of a control flow diagram when a photovoltaic device and a power supply cannot communicate according to an embodiment of the present disclosure is shown. Figure 2 As shown in the figure, this process includes: starting the control process, shutting down the PV device output, testing the switching power supply voltage, ensuring normal PV device output, testing the output voltage and current, calculating the cable resistance R, adjusting the PV device output voltage, compensating for cable voltage losses, and ensuring that the final PV device output meets system requirements. The process then loops back to the "Shutting Down the PV Device Output..." step. Because the switching power supply output may change due to factors such as switching between equalizing and floating charge, changes in battery type, etc., regular retesting and adjustment are required to ensure compatibility.

[0042] Figure 3A schematic diagram of a control flow diagram when a photovoltaic device and a power supply can communicate according to an embodiment of the present disclosure is shown. Figure 3 As shown in the figure, it includes the following steps: Start: Initiate the control process. The PV device reads the switching power supply voltage using communication functions (such as RS485 or CAN bus). The PV device directly obtains the output voltage from the switching power supply. The PV device output voltage and current are tested. The cable resistance R is calculated using a formula. The PV device output voltage is adjusted to compensate for cable voltage drop according to the formula to adapt the output to the system. The cycle then loops (returning to the "Reading the Switching Power Supply Voltage" step) to continuously calibrate the power supply voltage to account for fluctuations caused by equalizing and floating charging, load changes, and other factors.

[0043] Based on the same inventive concept, the embodiment of the present disclosure further provides a photovoltaic base station voltage tracking system corresponding to the above method, including: A communication determination module is used to determine whether the switching power supply and the photovoltaic device have communication functions, and obtain the output voltage value of the switching power supply based on the determination result; A resistance calculation module is used to test the photovoltaic device and obtain an initial photovoltaic device output voltage value, a photovoltaic device output current value, and an output voltage value of the switching power supply to calculate the DC cable resistance; a device output adjustment module, configured to calculate and adjust the initial photovoltaic device output voltage value based on the switching power supply output voltage value, the DC cable resistance, and the photovoltaic device output current value, to obtain an adjusted photovoltaic device output voltage value; The frequency adjustment module is used to repeatedly execute the communication judgment module, the resistance calculation module and the device output adjustment module based on a preset frequency to obtain a number of adjusted photovoltaic device output voltages, judge the stability of the changes in the output voltages of the several adjusted photovoltaic devices, and adjust the preset frequency based on the judgment results.

[0044] Based on the same inventive concept, the present disclosure also provides an electronic device. The electronic device of an embodiment of the present disclosure includes at least one processor and at least one memory electrically connected to the processor, wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method for tracking voltage of a stacked optical base station as described above.

[0045] It should be noted that the electrical connection between the above-mentioned units does not necessarily mean the connection between lines. An indirect connection method is applicable to the embodiments of the present disclosure as long as the purpose of the present disclosure is achieved.

[0046] Based on the same inventive concept, the present disclosure further provides a computer storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method for voltage tracking of a stacked optical base station as described above is implemented.

[0047] Based on the same inventive concept, the present disclosure also provides a computer program product, which is stored in at least one storage medium; the computer program product includes several instructions for enabling at least one computer device to execute the above-mentioned method for tracking voltage of a stacked optical base station.

[0048] Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A voltage tracking method for a stacked optical base station, characterized in that: The method comprises, S1, determining whether the switching power supply and the photovoltaic device have communication functions, and selecting different methods to obtain the output voltage value of the switching power supply based on the determination result; S2, testing the photovoltaic device to obtain an initial photovoltaic device output voltage value, a photovoltaic device output current value, and an output voltage value of the switching power supply to calculate a DC cable resistance; S3, calculating and adjusting the initial photovoltaic device output voltage value based on the switching power supply output voltage value, the DC cable resistance, and the photovoltaic device output current value to obtain an adjusted photovoltaic device output voltage value; S4, repeatedly executing S1-S3 based on the preset frequency, obtaining a number of adjusted photovoltaic device output voltages, judging the stability of the output voltage changes of the several adjusted photovoltaic devices, and adjusting the preset frequency based on the judgment result.

2. The method according to claim 1, characterized in that The output voltage value of the switching power supply is obtained based on the judgment result, specifically including: When the switching power supply and the photovoltaic device do not have the communication function, the photovoltaic device turns off the output voltage and measures the output voltage value of the switching power supply; When the switching power supply and the photovoltaic device have communication functions, the photovoltaic device communicates with the switching power supply to read the output voltage value of the switching power supply.

3. The method according to claim 2, characterized in that Calculate the DC cable resistance, including: DC cable resistance = (PV device output voltage - switching power supply output voltage) / PV device output current.

4. The method according to claim 3, characterized in that Calculate and adjust the output voltage of photovoltaic equipment, including: Adjust the output voltage of the photovoltaic equipment = the output voltage of the switching power supply + the resistance of the DC cable × the output current + the priority output voltage difference; Among them, the priority output voltage difference can be set to 0~0.5V.

5. The method according to claim 4, characterized in that Determine the stability of the output voltage changes of several photovoltaic equipment adjustments, including: Collect the output voltage values ​​of the photovoltaic equipment corresponding to several consecutive adjustment cycles, and calculate the absolute difference between the voltage values ​​of adjacent cycles and the voltage fluctuation amplitude; An absolute difference threshold and a voltage fluctuation amplitude threshold are set. If the absolute difference corresponding to M consecutive cycles is less than or equal to the absolute difference threshold and the voltage fluctuation amplitude is less than or equal to the voltage fluctuation amplitude threshold, it is judged that the output voltage change of the photovoltaic device is stable after several adjustments. Otherwise, it is judged that the output voltage change of the photovoltaic device is unstable after several adjustments.

6. The method according to claim 5, characterized in that Adjust the preset frequency based on the judgment result, specifically including: If it is determined that the voltage change is stable, reducing the preset frequency; If it is determined that the voltage change is unstable, the preset frequency is increased.

7. A voltage tracking system for a stacked optical base station, characterized in that: The system comprises: A communication determination module is used to determine whether the switching power supply and the photovoltaic device have communication functions, and obtain the output voltage value of the switching power supply based on the determination result; A resistance calculation module is used to test the photovoltaic device and obtain an initial photovoltaic device output voltage value, a photovoltaic device output current value, and an output voltage value of the switching power supply to calculate the DC cable resistance; a device output adjustment module, configured to calculate and adjust the initial photovoltaic device output voltage value based on the switching power supply output voltage value, the DC cable resistance, and the photovoltaic device output current value, to obtain an adjusted photovoltaic device output voltage value; The frequency adjustment module is used to repeatedly execute the communication judgment module, the resistance calculation module and the device output adjustment module based on a preset frequency to obtain a number of adjusted photovoltaic device output voltages, judge the stability of the changes in the output voltages of the several adjusted photovoltaic devices, and adjust the preset frequency based on the judgment results.

8. An electronic device, characterized in that: comprising at least one processor and at least one memory electrically connected; The memory is electrically connected to the processor, wherein the memory stores instructions that can be executed by at least one of the processors, and the instructions are executed by at least one of the processors to enable at least one of the processors to execute the method for voltage tracking of a stacked optical base station as described in any one of claims 1-6.

9. A computer storage medium, characterized in that The computer readable storage medium stores a computer program; When the computer program is executed by a processor, the method for voltage tracking of a stacked optical base station according to any one of claims 1 to 6 is implemented.

10. A computer program product, characterized in that The computer program product is stored in at least one storage medium; The computer program product includes several instructions for causing at least one electronic device to execute the method for voltage tracking of a stacked optical base station according to any one of claims 1 to 6.

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