Method and system for adjusting voltage of optical stacking system for communication power supply

Abstract

The invention relates to the technical field of photovoltaic power supply control, and provides a voltage adjusting method and system of a light stacking system for a communication power supply, and the method comprises the following steps: obtaining an initial voltage difference from a photovoltaic control system to a switching power supply busbar; acquiring busbar voltage of the switching power supply in real time, calculating photovoltaic output voltage based on the initial voltage difference, and updating the output voltage of the photovoltaic control system to a calculated value; and when the updated photovoltaic output voltage is within the set voltage range, fine tuning is performed on the output voltage based on the photovoltaic output current, and the voltage of the photovoltaic control system is updated to a fine-tuned voltage value. The photovoltaic output voltage can be adjusted in real time according to the output voltage of the switching power supply, and fine adjustment is performed on the output voltage based on the feedback current to keep the photovoltaic output voltage higher than the output voltage of the switching power supply, so that the utilization rate of a photovoltaic system is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of photovoltaic power supply control, and more specifically, to a method and system for adjusting the voltage of an overlay light system for a communication power supply. Background Art

[0002] The statements in this section merely provide background technical information related to the present disclosure and do not necessarily constitute prior art.

[0003] In the power supply system of modern communication base stations or computer rooms, the commercial power supplies the load through a switching power supply system, and the photovoltaic power generation system and the switching power supply system operate in parallel to provide power for the load, so as to improve the utilization rate of renewable energy and reduce the operation cost. The current power supply strategy is to give priority to using photovoltaic power. That is, when the photovoltaic system has power output, the photovoltaic system gives priority to supplying power to the load. When the photovoltaic power is insufficient, the switching power supply supplies the power. When the photovoltaic system has no output, the load will automatically be powered by the switching power supply. To ensure the priority power supply of the photovoltaic system, the prior art usually adopts the method of fixed voltage setting, that is, the output voltage of the photovoltaic system is set slightly higher than the output voltage of the switching power supply. For example, when the voltage of the switching power supply is 53.5V, the output voltage of the photovoltaic system is set to 54V to ensure that the photovoltaic system outputs electric energy first. However, since the photovoltaic system and the switching power supply are two independently operating systems, and the voltage control of the photovoltaic system is based on a fixed set value, during long-term operation, affected by factors such as equipment error, temperature change and grid fluctuation, the actual output voltage of the switching power supply may deviate. If the deviation causes the voltage of the photovoltaic system to be lower than that of the switching power supply, the photovoltaic system will not be able to provide power, and the photovoltaic power generation will be idle, unable to effectively reduce the consumption of commercial power, thus reducing the utilization rate of photovoltaic energy. In addition, the connection cable between the photovoltaic system and the switching power supply may have an increased contact resistance after long-term operation, which will also cause the photovoltaic system to be unable to output or output less. Moreover, the existing photovoltaic control strategy cannot adjust the photovoltaic voltage in real time to adapt to the change of the switching power supply, resulting in the dependence of the photovoltaic utilization rate on manual intervention or periodic adjustment, increasing the maintenance cost. Summary of the Invention

[0004] To solve the above problems, the present disclosure provides a method and system for adjusting the voltage of an overlay light system for a communication power supply, which can automatically adjust the output voltage of the photovoltaic in real time according to the output voltage of the switching power supply, and fine-tune the output voltage based on the feedback current to keep the output voltage of the photovoltaic higher than that of the switching power supply, thereby improving the utilization rate of the photovoltaic system.

[0005] To achieve the above object, the present disclosure adopts the following technical solutions:

[0006] One or more embodiments provide a method for adjusting the voltage of an overlay light system for a communication power supply, including the following steps:

[0007] Obtain the initial voltage difference from the photovoltaic control system to the switch-mode power supply busbar;

[0008] Obtain the busbar voltage V0 of the switch-mode power supply in real time, calculate the photovoltaic output voltage based on the initial voltage difference, and update the output voltage of the photovoltaic control system to the calculated value;

[0009] When the updated photovoltaic output voltage is within the set voltage range, fine-tune the output voltage based on the photovoltaic output current, and update the voltage of the photovoltaic control system to the fine-tuned voltage value.

[0010] One or more embodiments provide a voltage adjustment system for a communication power supply's superposed light system, including: a photovoltaic control system, a switch-mode power supply, and a monitoring module; the monitoring module is respectively connected to the switch-mode power supply and the photovoltaic control system, and the monitoring module is configured to execute the above-mentioned voltage adjustment method for a communication power supply's superposed light system, and adjust the output voltage of the photovoltaic control system based on the obtained output voltage of the switch-mode power supply.

[0011] One or more embodiments provide a voltage adjustment system for a communication power supply's superposed light system, including:

[0012] An acquisition module, configured to obtain the initial voltage difference from the photovoltaic control system to the switch-mode power supply busbar;

[0013] A calculation module, configured to obtain the busbar voltage V0 of the switch-mode power supply in real time, calculate the photovoltaic output voltage based on the initial voltage difference, and update the output voltage of the photovoltaic control system to the calculated value;

[0014] A fine-tuning module, configured to fine-tune the output voltage based on the photovoltaic output current when the updated photovoltaic output voltage is within the set voltage range, and update the voltage of the photovoltaic control system to the fine-tuned voltage value.

[0015] One or more embodiments provide an electronic device, including a memory, a processor, and computer instructions stored on the memory and running on the processor. When the computer instructions are run by the processor, the steps in the above-mentioned voltage adjustment method for a communication power supply's superposed light system are completed.

[0016] Compared with the prior art, the beneficial effects of the present disclosure are:

[0017] In this embodiment, a method combining voltage feedback and current feedback is used to achieve dynamic adjustment of the output voltage of the photovoltaic system. First, by measuring the voltage drop from the photovoltaic control system to the switch-mode power supply busbar, the initial voltage difference △V is obtained, and combined with the switch-mode power supply busbar voltage V0, a suitable photovoltaic output voltage is calculated. Subsequently, on the premise of ensuring that the voltage is within the set range, fine adjustment is performed based on the photovoltaic output current to make the output voltage of the photovoltaic control system more accurately match the system requirements, improving the power supply quality and stability. The adjustment method of this embodiment enables the photovoltaic output voltage to always be maintained within a reasonable range through real-time measurement and dynamic adjustment, reducing the impact caused by voltage fluctuations; using current feedback for fine adjustment to reduce power loss and improve the utilization rate of photovoltaic power; the method of this embodiment can be applied to different load requirements and can adaptively adjust the output voltage of the photovoltaic system to match different working environments.

[0018] The advantages of the present disclosure and the advantages of additional aspects will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings forming a part of this disclosure are used to provide a further understanding of the present disclosure. The schematic embodiments and descriptions thereof of the present disclosure are used to explain the present disclosure and do not constitute a limitation to the present disclosure.

[0020] Figure 1 is a schematic structural diagram of a voltage adjustment system for a stacked optical system for a communication power supply according to Embodiment 1 of the present disclosure;

[0021] Figure 2 is a flowchart of a voltage adjustment method for a stacked optical system for a communication power supply according to Embodiment 1 of the present disclosure; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The present disclosure will be further described below in conjunction with the drawings and embodiments.

[0023] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present disclosure. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present disclosure belongs.

[0024] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. It should be noted that, without conflict, the various embodiments and features in the present disclosure may be combined with each other. The embodiments will be described in detail below with reference to the accompanying drawings.

[0025] Embodiment 1

[0026] As Figure 1 and Figure 2 shown, a voltage regulation system for a superposed light system used in a communication power supply includes a photovoltaic control system, a switching power supply, and a monitoring module. The photovoltaic control system includes a plurality of photovoltaic modules, and each photovoltaic module is connected to a solar panel through a cable. Multiple solar panels form a solar array; the monitoring module is respectively connected to the switching power supply and the photovoltaic control system;

[0027] The output end of the photovoltaic module is connected to the switching power supply through a cable, and is used to supply power to the load through the switching power supply busbar by means of photovoltaic power generation;

[0028] The monitoring module is connected to the communication end of the photovoltaic module, and is used to send down the output voltage of the photovoltaic control system and simultaneously obtain the current of the photovoltaic control system;

[0029] The monitoring module is connected to the output end of the photovoltaic control system, and obtains the busbar output voltage of the switching power supply in the state where the photovoltaic module is turned off;

[0030] The photovoltaic control system mainly supplies power to the load. Generally, the photovoltaic output power is less than the load power; when the photovoltaic output power is greater than the load power, it can also supply power to a storage battery with management functions;

[0031] The photovoltaic control system can also be called a superposed light system and includes several photovoltaic modules;

[0032] Several photovoltaic modules are connected to the monitoring module through communication lines, and the switching power supply, the superposed light system, and the load are connected through busbars. The photovoltaic module is used to stabilize the photovoltaic output and supply power to the load, while the monitoring module is responsible for communicating with the photovoltaic module to achieve dynamic monitoring and adjustment of voltage and current.

[0033] Specifically, when the photovoltaic module starts to work, it will establish communication with the monitoring module. At this time, the output of the photovoltaic module is turned off, and the monitoring module obtains the output voltage of the photovoltaic system. At this time, this voltage is the busbar voltage, and based on this, the output voltage of the photovoltaic module is calculated, and then the calculated value is sent to the photovoltaic module. In addition, the monitoring module can also read the output current of the photovoltaic module in real time and adjust the output voltage according to the current feedback to ensure that the photovoltaic control system operates in the best working state.

[0034] In the technical solutions disclosed in one or more embodiments, a method for adjusting the voltage of a superposed light system for a communication power supply can be implemented in the monitoring module, as Figure 2 shown, and includes the following steps:

[0035] Step S1: Obtain the initial voltage difference △V between the photovoltaic control system and the switch-mode power supply busbar;

[0036] Step S2: Obtain the busbar voltage V0 of the switch-mode power supply in real time, calculate the photovoltaic output voltage based on the initial voltage difference, and update the output voltage of the photovoltaic control system to the calculated value;

[0037] Step S3: When the updated photovoltaic output voltage is within the set voltage range, finely adjust the output voltage based on the photovoltaic output current, and update the voltage of the photovoltaic control system to the finely adjusted voltage value;

[0038] Specifically, the output voltage of the photovoltaic control system is the output of the superposed light system after multiple photovoltaic modules are superimposed;

[0039] In this embodiment, a method combining voltage feedback and current feedback is used to realize the dynamic adjustment of the output voltage of the photovoltaic system. First, by measuring the voltage drop from the photovoltaic control system to the switch-mode power supply busbar, the initial voltage difference △V is obtained, and combined with the switch-mode power supply busbar voltage V0, a suitable photovoltaic output voltage is calculated; subsequently, on the premise of ensuring that the voltage is within the set range, fine adjustment is performed based on the photovoltaic output current, so that the output voltage of the photovoltaic control system more accurately matches the system requirements, improving the power supply quality and stability. The adjustment method of this embodiment enables the photovoltaic output voltage to always be maintained within a reasonable range through real-time measurement and dynamic adjustment, reducing the impact caused by voltage fluctuations; using current feedback for fine adjustment to reduce power loss and improve the utilization rate of photovoltaic electric energy; the method of this embodiment can be applied to different load requirements and can adaptively adjust the output voltage of the photovoltaic system to match different working environments.

[0040] Step S1: Obtain the voltage drop from the photovoltaic control system to the switch-mode power supply busbar as the initial voltage difference △V.

[0041] Specifically, start the monitoring module to measure the voltage drop from the photovoltaic control system to the switch-mode power supply busbar in real time, and store the measured voltage drop △V as the initial voltage difference in the monitoring module for subsequent calculation of the output voltage. This measurement is based on the current state of the system and can directly reflect the actual voltage difference.

[0042] Further, the monitoring module establishes communication with the photovoltaic module;

[0043] In step S2, the photovoltaic output voltage is the sum of the initial voltage difference and the busbar voltage of the switch-mode power supply. Based on the initial voltage difference, the calculation formula for the photovoltaic output voltage is:

[0044] V = V0 + △V;

[0045] where △V is the initial voltage difference and V0 is the busbar voltage of the switch-mode power supply.

[0046] Further, determine whether the updated photovoltaic output voltage is within the preset voltage range to generate a comparison result; optionally, for the communication switch-mode power supply, the preset voltage range is set to 48V - 56.4V, that is, the upper limit value is 56.4V and the lower limit value is 48V;

[0047] Further, in step S3, based on the comparison result with the preset voltage range, execute the corresponding output voltage determination instruction, specifically as follows;

[0048] Step S31: If the calculated photovoltaic output voltage V exceeds the preset output voltage range, the updated output voltage value is not sent to the photovoltaic module to keep the current output voltage of the photovoltaic control system unchanged; re-execute step 2 to obtain the busbar voltage of the switch-mode power supply and calculate the photovoltaic output voltage value V = V0 + △V;

[0049] Step S32: If the calculated photovoltaic output voltage V is within the preset output voltage range, send the output voltage value to the photovoltaic control system and update the calculated output voltage value V0 + △V to the rated voltage of the photovoltaic control system;

[0050] Further, when the updated photovoltaic output voltage is within the set voltage range, the method for fine-tuning the output voltage based on the photovoltaic output current includes the following steps:

[0051] Step S41: If the output current is 0, turn off the output loop of the photovoltaic module, re-obtain the busbar voltage V0 of the switch-mode power supply, calculate and send the photovoltaic control system output voltage V0 + △V to the photovoltaic module, and control the photovoltaic module to turn on;

[0052] Step S42: If the output current is not 0, execute the corresponding output voltage fine-tuning strategy and send the fine-tuned output voltage value to the photovoltaic control system;

[0053] Further technical solution: a fine-tuning strategy for the output voltage of a photovoltaic control system. By increasing or decreasing the output voltage by a preset voltage amplitude value, monitoring the increase and decrease of the current value, and changing the magnitude of the output voltage of the photovoltaic control system until the current remains unchanged after the voltage change, the changed voltage is used as the output voltage of the photovoltaic control system. The specific process is as follows:

[0054] 1-1) Set a first preset voltage difference amplitude A1 and a second preset voltage difference amplitude A2, and A1 > A2;

[0055] Further, the preset voltage difference amplitude satisfies a set proportional relationship. Specifically:

[0056] A2 = k × A1;

[0057] Where 0 < k < 1, and the preferred value range is 0.2 to 0.5 to ensure the accuracy of small-step adjustment;

[0058] In this embodiment, A2 is a certain proportion of A1, so that after initially determining the optimal voltage, finer adjustment can be performed with a smaller step size, improving the fine-tuning accuracy and convergence speed of the system;

[0059] 1-2) Continuously increase the output voltage value of the photovoltaic control system by a first preset voltage difference amplitude A1, obtain the output current value of the photovoltaic control system, and monitor the change of the output current value of the photovoltaic control system;

[0060] 1-3) If the output current value of the photovoltaic control system increases, continue to increase by a first preset voltage difference amplitude A1 until the current value of the photovoltaic control system remains unchanged, and obtain the output voltage of the photovoltaic control system;

[0061] 1-4) If during the process of repeatedly increasing by a first preset voltage difference amplitude A1, the current value of the photovoltaic control system decreases, then reduce the output voltage value of the photovoltaic control system by a second preset voltage difference amplitude A2 until the current value remains unchanged, and obtain the output voltage of the photovoltaic control system;

[0062] Further, in step 1-4), when the output current value remains unchanged, control the output voltage value to decrease by a preset voltage difference amplitude A1, and then determine whether the output current value changes again. If the output current value continues to remain unchanged, determine the output voltage value and send it to the photovoltaic module.

[0063] In this embodiment, the output voltage of the photovoltaic control system is dynamically adjusted to adapt to the load demand and ensure that the photovoltaic system operates at the optimal operating point. The fine-tuning strategy adopts the method of increasing or decreasing the voltage, and through the adjustment of unequal step sizes (A1, A2), precise output voltage control is achieved. When the photovoltaic output current changes, the monitoring module adjusts the output voltage to optimize the system performance; if the current remains unchanged, fine-tuning is performed to avoid energy loss or system instability caused by too high or too low voltage. The unequal step size voltage adjustment method is adopted to ensure that the photovoltaic output voltage can quickly and accurately match the load demand. By dynamically adjusting the output voltage, the photovoltaic system always operates in the best state, improving the conversion efficiency of photovoltaic power generation. It can effectively respond to load changes, ensure stable power supply of the photovoltaic control system, and reduce the impact of voltage fluctuations.

[0064] Through the above control scheme, the output voltage of the photovoltaic module can be automatically adjusted. When the photovoltaic module works and the output current maintains the maximum value, the corresponding output voltage is output as the rated voltage (reference voltage), so as to give priority to the output of the photovoltaic module while improving the utilization rate of the superposed light system.

[0065] Embodiment 2

[0066] Based on Embodiment 1, a voltage adjustment system for a superposed light system for a communication power supply is provided in this embodiment, including:

[0067] An acquisition module, configured to acquire the initial voltage difference from the photovoltaic control system to the switch power supply busbar;

[0068] A calculation module, configured to acquire the busbar voltage of the switch power supply when the photovoltaic module does not output, calculate the photovoltaic output voltage based on the initial voltage difference, and update the output voltage of the photovoltaic control system to the calculated value;

[0069] A fine-tuning module, configured to fine-tune the output voltage based on the photovoltaic output current when the updated photovoltaic output voltage is within the set voltage range, and update the voltage of the photovoltaic control system to the fine-tuned voltage value.

[0070] It should be noted here that each module in this embodiment corresponds to each step in Embodiment 1, and the specific implementation process is the same, so it will not be repeated here.

[0071] Embodiment 3

[0072] Based on Embodiment 1, an electronic device is provided in this embodiment, including a memory, a processor, and computer instructions stored on the memory and running on the processor. When the computer instructions are run by the processor, the steps in the method for adjusting the voltage of a superposed light system for a communication power supply described in Embodiment 1 are completed.

[0073] The above are only the preferred embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included within the protection scope of the present disclosure.

[0074] Although the specific implementation manners of the present disclosure have been described above in conjunction with the accompanying drawings, it is not a limitation on the protection scope of the present disclosure. Those skilled in the art should understand that, based on the technical solutions of the present disclosure, various modifications or deformations that can be made by those skilled in the art without creative efforts are still within the protection scope of the present disclosure.

Claims

1. A method for adjusting the voltage of an optical superposition system for a communication power supply, characterized in that, It includes the following steps: Obtain the initial voltage difference between the photovoltaic control system and the switch-mode power supply busbar; Obtain the busbar voltage of the switch-mode power supply in real time, calculate the photovoltaic output voltage based on the initial voltage difference, and update the output voltage of the photovoltaic control system to the calculated value; When the updated photovoltaic output voltage is within the set voltage range, finely adjust the output voltage based on the photovoltaic output current, and update the voltage of the photovoltaic control system to the finely adjusted voltage value.

2. The voltage adjustment method of the superposed optical system for a communication power supply according to claim 1, characterized in that: The photovoltaic output voltage is the sum of the initial voltage difference and the busbar voltage of the switch-mode power supply.

3. The voltage adjustment method of the superimposed optical system for a communication power supply according to claim 1, characterized in that, Based on the comparison result with the preset voltage range, execute the corresponding output voltage determination instruction, specifically as follows: If it is calculated that the photovoltaic output voltage exceeds the preset output voltage range, the updated output voltage value is not sent to the photovoltaic module to keep the current output voltage of the photovoltaic control system unchanged, and the busbar voltage is re-obtained for calculation; If it is calculated that the photovoltaic output voltage is within the preset output voltage range, the output voltage value is sent to the photovoltaic control system, and the calculated output voltage value is updated to the rated voltage of the photovoltaic control system.

4. A method for adjusting the voltage of an optical superposition system for a communication power supply according to claim 1, characterized in that: The output voltage fine-tuning strategy is to increase or decrease the output voltage by a preset voltage amplitude value, monitor the increase and decrease of the current value, and change the magnitude of the output voltage of the photovoltaic control system until the current remains unchanged after the voltage change, and use the changed voltage as the output voltage of the photovoltaic control system.

5. The voltage adjustment method for a superimposed light system for a communication power supply according to claim 4, characterized in that: The output voltage fine-tuning strategy of the photovoltaic control system is specifically as follows: Set a first preset voltage difference amplitude A1 and a second preset voltage difference amplitude A2, and A1 > A2; Continue to increase the output voltage value of the photovoltaic control system by a first preset voltage difference amplitude A1, obtain the output current value of the photovoltaic control system, and monitor the change of the output current value of the photovoltaic control system; If the output current value of the photovoltaic control system increases, continue to increase it by a first preset voltage difference amplitude A1 until the current value of the photovoltaic control system remains unchanged, and obtain the output voltage of the photovoltaic control system; If during the process of increasing a first preset voltage difference amplitude A1 multiple times, the current value of the photovoltaic control system decreases, then reduce the output voltage value of the photovoltaic control system by a second preset voltage difference amplitude A2 until the current value remains unchanged, and obtain the output voltage of the photovoltaic control system.

6. The voltage adjustment method for a superimposed light system for a communication power supply according to claim 1, characterized in that: When the output current value remains unchanged, control the output voltage value to decrease by a preset voltage difference amplitude A1, and then determine whether the output current value changes again. If the output current value continues to remain unchanged, determine the output voltage value and send it to the photovoltaic module.

7. A method for adjusting the voltage of an optical superposition system for a communication power supply according to claim 1, characterized in that: The first preset voltage difference amplitude A1 and the second preset voltage difference amplitude A2 satisfy a set proportional relationship.

8. A voltage adjustment system for an optical superposition system used in a communication power supply, characterized in that, It includes: A photovoltaic control system, a switch-mode power supply, and a monitoring module; the monitoring module is respectively connected to the switch-mode power supply and the photovoltaic control system, and the monitoring module is configured to execute the voltage adjustment method for a superimposed light system for a communication power supply according to any one of claims 1-7, and adjust the output voltage of the photovoltaic control system based on the obtained output voltage of the switch-mode power supply.

9. A voltage adjustment system for an overlapping optical system used in a communication power supply, characterized in that, It includes: An acquisition module, configured to acquire an initial voltage difference between a photovoltaic control system and a switch-mode power supply busbar; A calculation module, configured to acquire the busbar voltage of the switch-mode power supply in real time, calculate the photovoltaic output voltage based on the initial voltage difference, and update the output voltage of the photovoltaic control system to the calculated value; A fine-tuning module, configured to fine-tune the output voltage based on the photovoltaic output current when the updated photovoltaic output voltage is within a set voltage range, and update the voltage of the photovoltaic control system to the fine-tuned voltage value.

10. An electronic device, characterized in that, It includes a memory, a processor, and computer instructions stored on the memory and running on the processor. When the computer instructions are run by the processor, the steps in a method for adjusting the voltage of an optical superposition system for a communication power supply according to any one of claims 1-7 are completed.

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