A folded optical base station voltage tracking method, system, device, and medium

Abstract

The present disclosure belongs to the technical field of photovoltaic communication base station, and particularly relates to a stacked light base station voltage tracking method, system, device and medium, the method comprising: S1, judging whether the switching power supply and the photovoltaic device have communication functions, and selecting different methods to obtain the switching power supply output voltage value based on the judgment result; S2, testing the photovoltaic device to obtain the initial photovoltaic device output voltage value, the photovoltaic device output current value and the switching power supply output voltage value, so as to calculate the direct current cable resistance; S3, calculating the adjustment of the initial photovoltaic device output voltage value based on the switching power supply output voltage value, the direct current cable resistance and the photovoltaic device output current value, to obtain the adjusted photovoltaic device output voltage value; S4, repeatedly executing S1-S3 based on the preset frequency to obtain several adjusted photovoltaic device output voltages, judging the stability of the change of the several adjusted photovoltaic device output voltages, and adjusting the preset frequency based on the judgment result. The present application improves the accuracy of voltage tracking.

Description

Technical Field

[0001] This disclosure belongs to the field of photovoltaic communication base station technology, and in particular relates to a voltage tracking method, system, device and medium for a photovoltaic base station. Background Technology

[0002] A photovoltaic (DC) power supply system is a low-carbon energy solution that superimposes a photovoltaic power supply system onto a communication base station with mains power. This system directly converts the DC voltage output from the photovoltaic modules into the DC voltage level required by the communication equipment to power the base station equipment.

[0003] In addition to the existing switching power supply, the communication base station is powered by photovoltaic equipment. The two power sources supply power simultaneously, with the output voltage of the photovoltaic equipment being slightly higher than that of the switching power supply to ensure priority power supply to the photovoltaic equipment. The switching power supply supplements the insufficient power supply from the photovoltaic equipment, maximizing the use of clean energy, increasing the green electricity ratio of 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 supply varies between different base stations. The switching power supply for the same base station needs to periodically equalize the battery charge, and the output voltage will periodically switch between equalization charge voltage and float charge voltage. Therefore, the output voltage of the same base station will differ at different times. Affected by solar radiation or load fluctuations, the cable voltage drop from the photovoltaic equipment to the switching power supply also changes dynamically.

[0005] When the output voltage of a photovoltaic (PV) device is too high, it may overcharge the battery, affecting its lifespan, or exceed the operating voltage range of the communication equipment, affecting its operation. Conversely, if the output voltage of the PV device is too low, it will be unable to output power, resulting in wasted solar energy. Therefore, PV devices need to track the output voltage of the switching power supply system in real time and keep it slightly higher to ensure priority output and stable power supply. Summary of the Invention

[0006] To address the aforementioned issues, this disclosure provides a method, system, device, and medium for voltage tracking of photovoltaic base stations. It employs a strategy of dynamically sensing the switching power supply voltage, calculating / updating cable voltage drop online, and adding a safety margin. Furthermore, it introduces a control frequency adaptive mechanism, enabling precise tracking of the photovoltaic output voltage to the switching power supply voltage.

[0007] In a first aspect, this disclosure provides a voltage tracking method for a superimposed optical base station, the method comprising, S1, determine whether the switching power supply and photovoltaic equipment have communication functions, and select different methods to obtain the output voltage value of the switching power supply based on the judgment result; S2, Test the photovoltaic equipment to obtain the initial output voltage value of the photovoltaic equipment, the output current value of the photovoltaic equipment, and the output voltage value of the switching power supply, so as to calculate the DC cable resistance; S3, calculate and adjust the initial output voltage value of the photovoltaic device based on the output voltage value of the switching power supply, the resistance of the DC cable, and the output current value of the photovoltaic device, to obtain the adjusted output voltage value of the photovoltaic device; S4, S1-S3 are repeatedly executed based on a preset frequency to obtain several adjustable photovoltaic device output voltages, the stability of the output voltage changes of several adjustable photovoltaic devices is judged, and the preset frequency is adjusted based on the judgment results.

[0008] Furthermore, The output voltage value of the switching power supply is obtained based on the judgment result, specifically including: When the switching power supply and photovoltaic equipment do not have communication function, the photovoltaic equipment shuts off the output voltage, and the output voltage value of the switching power supply is measured. When the switching power supply and the photovoltaic device have communication capabilities, the photovoltaic device communicates with the switching power supply and reads the output voltage value of the switching power supply.

[0009] Furthermore, Calculating the resistance of a DC cable specifically includes: DC cable resistance = (output voltage of photovoltaic equipment - output voltage of switching power supply) / output current of photovoltaic equipment.

[0010] Furthermore, Calculating and adjusting the output voltage of photovoltaic equipment specifically includes: Adjusting the output voltage of the photovoltaic equipment = switching power supply output voltage + DC cable resistance × output current + priority output voltage difference; The priority output voltage difference can be set from 0 to 0.5V.

[0011] Furthermore, Determining the stability of output voltage variations in several photovoltaic devices includes: Collect the output voltage values ​​of the photovoltaic equipment corresponding to several consecutive adjustment cycles, and calculate the absolute difference and voltage fluctuation amplitude of the voltage values ​​of adjacent cycles. Set an absolute difference threshold and a voltage fluctuation amplitude threshold. If the absolute difference 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 for M consecutive periods, then the output voltage of several adjusted photovoltaic devices is determined to be stable. Otherwise, the output voltage of several adjusted photovoltaic devices is determined to be unstable.

[0012] Furthermore, Adjusting the preset frequency based on the judgment result specifically includes: If the voltage change is determined to be stable, then the preset frequency is reduced; If the voltage change is determined to be unstable, the preset frequency is increased.

[0013] Secondly, based on the same inventive concept, this disclosure provides a voltage tracking system for a superimposed optical base station, the system comprising: The communication judgment module is used to determine whether the switching power supply and the photovoltaic device have communication functions, and obtains the output voltage value of the switching power supply based on the judgment result; The resistance calculation module is used to test the photovoltaic equipment, obtain the initial output voltage value of the photovoltaic equipment, the output current value of the photovoltaic equipment and the output voltage value of the switching power supply, and calculate the resistance of the DC cable. The device output adjustment module is used to calculate and adjust the initial photovoltaic device output voltage value based on the output voltage value of the switching power supply, the resistance of the DC cable, and the output current value of the photovoltaic device, so as to obtain the 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 several adjustable photovoltaic device output voltages, judge the stability of several adjustable photovoltaic device output voltage changes, and adjust the preset frequency based on the judgment results.

[0014] Thirdly, this disclosure also provides an electronic device, including at least one processor and at least one memory electrically connected; The memory is electrically connected to the processor, wherein the memory stores instructions executable by at least one of the processors, the instructions being executed by at least one of the processors to enable at least one of the processors to perform any of the superimposed optical base station voltage tracking methods as described above.

[0015] Fourthly, this disclosure also provides a computer storage medium in which a computer program is stored; When the computer program is executed by the processor, it implements any of the methods for voltage tracking of the superimposed optical base station as described above.

[0016] Fifthly, this disclosure also provides a computer program product, which is stored in at least one storage medium; The computer program product includes several instructions for causing at least one electronic device to perform any of the above-described methods for superimposed optical base station voltage tracking.

[0017] Compared with the prior art, this disclosure has the following advantages: 1. Differentiate between whether the switching power supply and photovoltaic equipment have communication functions, and obtain the output voltage value of the switching power supply using the corresponding method. Whether it is a direct reading in the scenario where the switching power supply and photovoltaic equipment can communicate normally, or an indirect measurement when communication is not possible, it can be adapted and has an adaptive function, covering different communication base station equipment configurations and has a wide range of applications.

[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 and improve the output voltage matching degree and the stability of the base station power supply.

[0019] 3. The process is repeatedly executed based on a preset frequency, and the frequency is adjusted based on the stability feedback of the output voltage changes after several adjustments. The adjustment cycle can be flexibly adapted to the actual voltage fluctuation. When the fluctuation is large, the adjustment is intensified to ensure stability, and when the fluctuation is small, the frequency is reduced to reduce unnecessary calculations. While ensuring voltage tracking effect, resource consumption is optimized, and the intelligence and efficiency of the method are improved.

[0020] Other features and advantages of this disclosure will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the disclosure. The objects and other advantages of this disclosure may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic flowchart of a voltage tracking method for a superimposed optical base station according to an embodiment of the present disclosure is shown; Figure 2 This diagram illustrates a control flow when a photovoltaic device and a switching power supply cannot communicate, according to an embodiment of the present disclosure. Figure 3 A schematic diagram of the control flow is shown when a photovoltaic device and a switching power supply can communicate according to an embodiment of the present disclosure. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0024] Figure 1 A schematic flowchart of a voltage tracking method for a superimposed optical base station according to an embodiment of the present disclosure is shown, as follows: Figure 1 As shown, the voltage tracking method for a superimposed optical base station according to an embodiment of this disclosure includes, S1, determine whether the switching power supply and photovoltaic equipment have communication functions, and select a method to obtain the output voltage value of the switching power supply based on the judgment result; In this embodiment of the disclosure, communication capability detection can be based on handshake signals or status register readings from predefined communication protocols (such as Modbus, CAN, RS485). For scenarios lacking communication capabilities, a specific "detection mode" trigger signal (such as a specific IO level or a short-time shutdown pulse) can be designed to notify the photovoltaic equipment to cooperate in shutting down the output.

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

[0026] In the embodiments of this disclosure, step S1 specifically includes: S11, When the switching power supply and photovoltaic equipment do not have communication function, the photovoltaic equipment shuts off the output voltage and the output voltage value of the switching power supply is measured; In scenarios without communication, by actively controlling the photovoltaic equipment to shut down the output, the interference of 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 reference for subsequent calculations.

[0027] S12, when the switching power supply and photovoltaic equipment have communication functions, the photovoltaic equipment and the switching power supply communicate 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 read directly, which is fast and disturbance-free, and eliminates the need for frequent start-stop of photovoltaic equipment, thereby improving system response efficiency and energy utilization.

[0029] In this embodiment of the disclosure, step S12 may further include: An encrypted communication protocol is used to prevent unauthorized tampering during data transmission. S2, Test the photovoltaic equipment to obtain the initial output voltage value of the photovoltaic equipment, the output current value of the photovoltaic equipment, and the output voltage value of the switching power supply, so as to calculate the DC cable resistance; Wherein, DC cable resistance = (photovoltaic equipment output voltage value - switching power supply output voltage value) / photovoltaic equipment output current value.

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

[0031] In this embodiment of the disclosure, the DC cable resistance is measured and calculated in real time online, rather than relying on a fixed cable parameter table or initial measurement value, to accurately compensate for the line voltage drop caused by factors such as cable length, wire diameter, aging, and temperature changes (which affect resistivity), thereby ensuring that the photovoltaic output voltage effectively tracks the target value.

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

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

[0034] This disclosure embodiment prevents the photovoltaic power supply from reversing and supplying power to the photovoltaic device by setting a priority output voltage difference to prevent the photovoltaic voltage from falling below the switching power supply voltage. This protects the switching power supply and ensures that the photovoltaic system is always generating power. S4, S1-S3 are repeatedly executed based on a preset frequency to obtain several adjustable photovoltaic device output voltages, the stability of the output voltage changes of several adjustable photovoltaic devices is judged, and the preset frequency is adjusted based on the judgment results.

[0035] In this embodiment of the disclosure, step S5 specifically includes: S41, Collect the output voltage values ​​of the photovoltaic equipment corresponding to several consecutive adjustment cycles, and calculate the absolute difference and voltage fluctuation amplitude of the voltage values ​​of adjacent cycles. S42, set 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, then it is determined that the output voltage of several adjusted photovoltaic devices is stable; otherwise, it is determined that the output voltage of several adjusted photovoltaic devices is unstable.

[0036] In this embodiment, the number of consecutive 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 this embodiment of the disclosure, step S4 further includes: S43, if it is determined that the voltage change is stable, then reduce the preset frequency; S44, if it is determined that the voltage change is unstable, then 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] This embodiment of the present disclosure solves the problems faced by fixed-frequency control by dynamically adjusting the update frequency of voltage tracking. High-frequency control has high precision but heavy communication / computing burden and may cause oscillation, while low-frequency control has light burden but slow response and poor precision. When the system is running stably, the execution frequency is automatically reduced, which greatly reduces unnecessary communication traffic, computing resource consumption and the number of times photovoltaic equipment control commands are sent, thereby improving the overall efficiency and reliability of the system. When voltage fluctuations are detected, the execution frequency is automatically increased to quickly restore tracking accuracy and system stability, ensuring efficient photovoltaic power generation and power quality.

[0041] Figure 2 This diagram illustrates a control flow when a photovoltaic device and a power source cannot communicate, according to an embodiment of this disclosure. See also... Figure 2 As shown, the process includes: starting the control flow, shutting down the photovoltaic equipment output, testing the switching power supply voltage, ensuring the photovoltaic equipment outputs normally, testing the output voltage and current, calculating the cable resistance R, adjusting the photovoltaic equipment output voltage, compensating for cable voltage loss, and ensuring the photovoltaic equipment's final output meets system requirements. It then loops back to the "shut down photovoltaic equipment output..." step because the switching power supply output may change due to switching between equalization and float charging, changes in battery type, etc., requiring periodic retesting and adjustments to ensure compatibility.

[0042] Figure 3This diagram illustrates a control flow when a photovoltaic device and a power supply can communicate according to an embodiment of the present disclosure. See also: Figure 3 As shown, it includes: Start: Initiating the control process, the photovoltaic device reads the switching power supply voltage using communication functions (such as RS485, CAN bus, etc.). The photovoltaic device directly obtains the output voltage from the switching power supply, tests the output voltage and current of the photovoltaic device, calculates the cable resistance R using a formula, and adjusts the output voltage of the photovoltaic device according to the formula to compensate for the cable voltage drop, making the output compatible with the system. Then it loops (returning to the "read switching power supply voltage" step) to continuously calibrate the power supply voltage to cope with fluctuations caused by equalization and floating charging, load changes, etc.

[0043] Based on the same inventive concept, this disclosure also provides a photovoltaic base station voltage tracking system corresponding to the above method, including: The communication judgment module is used to determine whether the switching power supply and the photovoltaic device have communication functions, and obtains the output voltage value of the switching power supply based on the judgment result; The resistance calculation module is used to test the photovoltaic equipment, obtain the initial output voltage value of the photovoltaic equipment, the output current value of the photovoltaic equipment and the output voltage value of the switching power supply, and calculate the resistance of the DC cable. The device output adjustment module is used to calculate and adjust the initial photovoltaic device output voltage value based on the output voltage value of the switching power supply, the resistance of the DC cable, and the output current value of the photovoltaic device, so as to obtain the 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 several adjustable photovoltaic device output voltages, judge the stability of several adjustable photovoltaic device output voltage changes, and adjust the preset frequency based on the judgment results.

[0044] Based on the same inventive concept, this disclosure also provides an electronic device. The electronic device of this 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, which, when executed, enables the at least one processor to perform the method for superimposed optical base station voltage tracking as described above.

[0045] It should be noted that the electrical connections between the various units mentioned above do not necessarily represent the connections between lines. Any indirect connection method can be applied to the embodiments of this disclosure as long as it achieves the purpose of this disclosure.

[0046] Based on the same inventive concept, this disclosure also provides a computer storage medium storing a computer program, which, when executed by a processor, implements the method for voltage tracking of a superimposed optical base station as described above.

[0047] Based on the same inventive concept, this disclosure also provides a computer program product stored in at least one storage medium; the computer program product includes several instructions to cause at least one computer device to perform the method of superimposed optical base station voltage tracking as described above.

[0048] Although the present disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and such modifications or substitutions 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 superimposed optical base station, characterized in that, The method includes, S1, determine whether the switching power supply and photovoltaic equipment have communication functions, and select different methods to obtain the output voltage value of the switching power supply based on the judgment result; S2, Test the photovoltaic equipment to obtain the initial output voltage value of the photovoltaic equipment, the output current value of the photovoltaic equipment, and the output voltage value of the switching power supply, so as to calculate the DC cable resistance; S3, calculate and adjust the initial output voltage value of the photovoltaic device based on the output voltage value of the switching power supply, the resistance of the DC cable, and the output current value of the photovoltaic device, to obtain the adjusted output voltage value of the photovoltaic device; Calculating and adjusting the output voltage of photovoltaic equipment specifically includes: Adjusting the output voltage of the photovoltaic equipment = switching power supply output voltage + DC cable resistance × output current + priority output voltage difference; The priority output voltage difference is set to 0–0.5V; S4, S1-S3 are repeatedly executed based on a preset frequency to obtain several adjustable photovoltaic device output voltages, the stability of the output voltage changes of several adjustable photovoltaic devices is judged, and the preset frequency is adjusted based on the judgment results; Determining the stability of output voltage variations in several photovoltaic devices includes: Collect the output voltage values ​​of the photovoltaic equipment corresponding to several consecutive adjustment cycles, and calculate the absolute difference and voltage fluctuation amplitude of the voltage values ​​of adjacent cycles. Set 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, then the output voltage of several adjusted photovoltaic devices is determined to be stable. Otherwise, the output voltage of several adjusted photovoltaic devices is determined to be unstable. Adjusting the preset frequency based on the judgment result specifically includes: If the voltage change is determined to be stable, then the preset frequency is reduced; If the voltage change is determined to be unstable, the preset frequency is increased.

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 photovoltaic equipment do not have communication function, the photovoltaic equipment shuts off the output voltage, and the output voltage value of the switching power supply is measured. When the switching power supply and the photovoltaic device have communication capabilities, the photovoltaic device communicates with the switching power supply and reads the output voltage value of the switching power supply.

3. The method according to claim 2, characterized in that, Calculating the resistance of a DC cable specifically includes: DC cable resistance = (output voltage of photovoltaic equipment - output voltage of switching power supply) / output current of photovoltaic equipment.

4. A voltage tracking system for a superimposed optical base station, executing the voltage tracking method for a superimposed optical base station as described in any one of claims 1-3, characterized in that, The system includes: The communication judgment module is used to determine whether the switching power supply and the photovoltaic device have communication functions, and obtains the output voltage value of the switching power supply based on the judgment result; The resistance calculation module is used to test the photovoltaic equipment, obtain the initial output voltage value of the photovoltaic equipment, the output current value of the photovoltaic equipment and the output voltage value of the switching power supply, and calculate the resistance of the DC cable. The device output adjustment module is used to calculate and adjust the initial photovoltaic device output voltage value based on the output voltage value of the switching power supply, the resistance of the DC cable, and the output current value of the photovoltaic device, so as to obtain the 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 several adjustable photovoltaic device output voltages, judge the stability of several adjustable photovoltaic device output voltage changes, and adjust the preset frequency based on the judgment results.

5. An electronic device, characterized in that, Includes at least one processor and at least one memory electrically connected; The memory is electrically connected to the processor, wherein the memory stores instructions executable by at least one of the processors, the instructions being executed by at least one of the processors to enable at least one of the processors to perform the method of superimposed optical base station voltage tracking as described in any one of claims 1-3.

6. A computer storage medium, characterized in that, The computer storage medium stores a computer program. When the computer program is executed by the processor, it implements the method for voltage tracking of the superimposed optical base station as described in any one of claims 1-3.

7. 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 perform the method of voltage tracking of a superimposed optical base station as described in any one of claims 1-3.

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