A solar and wind energy centralized power supply system for communication base stations

Abstract

The present invention provides a communication base station solar and wind energy centralized power supply system, which relates to the technical field of multi-channel energy power supply management. According to the present invention, a dual-busbar architecture is designed to form a physically isolated independent loop between the energy storage bus and the load bus. In conjunction with the coordinated control of the wind power switching module and the photovoltaic switching module, the switching decision module compares the wind power and photovoltaic output power with the load demand in real time. By dynamically switching the power supply path energy storage bus or load bus, the maximum on-site consumption of renewable energy power generation can be achieved, and the utilization rate of mains electricity can be reduced. The electric energy output by the wind power rectifier module and the isolated power supply module can be directly injected into the load bus through the wind power switching module and the photovoltaic switching module, so as to give priority to meeting the real-time load demand.

Description

Technical Field

[0001] The present invention relates to the technical field of multi-channel energy power supply management, and in particular to a communication base station solar and wind energy centralized power supply system. Background Art

[0002] As the core infrastructure of modern communications networks, the reliability of communication base stations' power supply directly impacts the quality of communication services. In remote mountainous areas, islands, and other areas with limited utility grid coverage, the use of wind-solar hybrid power systems has become a key solution. Existing technologies typically connect wind and photovoltaic power generation equipment in parallel to the same busbar, using rectifiers and energy storage systems to power the load. Energy storage batteries buffer intermittent power, switching to utility backup when wind and solar power generation is insufficient.

[0003] A single-bus architecture connects wind and solar power generation equipment and energy storage systems directly in parallel on the same bus. The power output from wind turbines and photovoltaic panels is fed into a single bus, where it is first stored in batteries after rectification and voltage regulation, and then supplied to the load by the energy storage system. This architecture requires wind and solar energy to pass through the energy storage stage before it can be utilized. This can easily lead to secondary energy losses caused by "storage first, then release" during fluctuating light and wind conditions. Furthermore, the capacity limitations of the energy storage system necessitate frequent utility intervention. Especially when wind and solar resources are highly intermittent, the existing system struggles to achieve real-time power balance between the generation and load sides, resulting in significant amounts of wind and solar energy being wasted during the storage and release process.

[0004] The above information disclosed in this Background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. Summary of the Invention

[0005] The object of the present invention is to provide a communication base station solar and wind energy centralized power supply system to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A solar and wind energy centralized power supply system for a communication base station, comprising a wind turbine, a photovoltaic unit, and a busbar, wherein the busbar comprises an energy storage busbar and a load busbar that are independent of each other, wherein:

[0008] The wind turbine generator set and the wind power switching module are electrically connected via a wind power rectifier module. The wind turbine generator set is used to convert wind energy into alternating current and then transmit it to the wind power rectifier module. The wind power rectifier module is used to rectify the alternating current generated by the wind turbine generator set into direct current and then transmit it to the energy storage bus or the load bus after switching and selecting through the wind power switching module.

[0009] The photovoltaic unit and the photoelectric switching module are electrically connected via an isolated power supply module. The photovoltaic unit is used to convert solar energy into direct current and then transmit it to the isolated power supply module. The isolated power supply module is used to perform voltage conversion and voltage isolation on the direct current generated by the photovoltaic unit, and then switch and select it through the photoelectric switching module before transmitting it to the energy storage bus or the load bus.

[0010] The load bus is also electrically connected to a mains power supply module, which is also electrically connected to a switching decision module and is configured to rectify the mains power into alternating current under the control of the switching decision module to supply power to the load bus;

[0011] The output end of the wind power rectifier module and the output end of the isolated power supply module are also electrically connected to a switching decision module, which is used to collect the output power of the wind power rectifier module and the isolated power supply module, and compare them with the output power of the load bus, and selectively control the output of the wind power rectifier module and the output of the isolated power supply module to power the energy storage bus or the load bus.

[0012] Furthermore, the AC power supply module includes a AC rectifier unit, which is used to rectify the AC power provided by the AC power supply bus and transmit it to the AC switching unit. The output end of the AC switching unit is electrically connected to the load bus, and the control end is electrically connected to the switching decision module, which is used to realize on-off switching with the load bus under the control of the switching decision module.

[0013] Furthermore, the switching decision module includes a wind power sensing unit and a photoelectric sensing unit. The wind power sensing unit is electrically connected to the output of the wind power rectifier module and is used to collect power data output by the wind power rectifier module. The photoelectric sensing unit is electrically connected to the output of the isolation power supply module and is used to collect power data output by the isolation power supply module. The output end of the load bus is electrically connected to a load sensing unit, and the load sensing unit is used to collect total power data output by the load bus. The wind power sensing unit, the photoelectric sensing unit and the load sensing unit are all electrically connected to the control unit and send the collected power data to the control unit respectively.

[0014] Furthermore, the control ends of the wind power switching module and the photovoltaic switching module are electrically connected to the control unit, and the control unit selectively controls the outputs of the wind power switching module and the photovoltaic switching module to supply power to the energy storage bus or the load bus. The control end of the AC power switching unit is electrically connected to the control unit, and is used to realize on-off switching with the load bus under the control of the control unit.

[0015] Furthermore, the power data collected by the wind power sensor unit and the photoelectric sensor unit are respectively The output power of the wind power rectifier module and the isolated power supply module within the time period, where Indicates the current timestamp, Indicates the time length of the collected power data. The power data of the load sensing unit is The total power data of the load bus output during the time period.

[0016] Furthermore, the specific logic of the control unit controlling the wind power switching module, the photovoltaic switching module and the mains switching unit is:

[0017] calculate The relationship between the total power output of the load bus at any moment and the sum of the output power of the wind power rectifier module and the isolated power supply module is , the wind power switching module and the photovoltaic switching module are switched to be electrically connected to the energy storage bus, and the mains switching unit is switched to the on state. 、 and Respectively The total power output by the load bus at any moment, and the output power of the wind power rectifier module and the isolated power supply module;

[0018] like , calculate the past The total power output of the load bus during the time length, and the total power output of the load bus during the past The sum of the output power of the wind power rectifier module and the isolated power supply module within the time length is calculated based on the formula:

[0019]

[0020] in, Indicates the past The sum of the total power output of the load bus within the time length, and Respectively represent the sum of the output power of the wind power rectifier module and the isolated power supply module, 、 and Respectively The total power output of the load bus at any moment, the output power of the wind power rectifier module and the isolation power module, ;

[0021] if , the wind power switching module or the photovoltaic switching module or both are switched to be electrically connected to the load bus, and the mains switching unit is switched to the disconnected state; otherwise, the wind power switching module and the photovoltaic switching module are both switched to be electrically connected to the energy storage bus, and the mains switching unit is switched to the on state, wherein represents the risk weight, and .

[0022] Furthermore, if ,and , the wind power switching module is switched to be electrically connected to the load bus, the photovoltaic switching module is switched to be electrically connected to the energy storage bus, and the mains switching unit is switched to the disconnected state;

[0023] like ,and , the photovoltaic switching module is switched to be electrically connected to the load bus, the wind power switching module is switched to be electrically connected to the energy storage bus, and the mains switching unit is switched to the disconnected state;

[0024] if and All less than ,and , the wind power switching module and the photovoltaic switching module are both switched to be electrically connected to the load bus, and the mains switching unit is switched to the circuit breaker state.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The present invention uses a dual-busbar architecture design to form a physically isolated independent loop between the energy storage bus and the load bus. In conjunction with the coordinated control of the wind power switching module and the photovoltaic switching module, the switching decision module compares the wind power and photovoltaic output power with the load demand in real time. By dynamically switching the power supply path energy storage bus or load bus, the maximum on-site consumption of renewable energy power generation can be achieved, and the utility power utilization rate can be reduced. The electric energy output by the wind power rectifier module and the isolated power supply module can be directly injected into the load bus through the wind power switching module and the photovoltaic switching module, giving priority to meeting the real-time load demand. The switching decision module compares the wind power / photovoltaic output power with the load demand in real time. When the total wind and solar power continuously covers the load demand, the utility power supply module is in an offline state; the utility power supply is only started when the wind and solar power generation is insufficient and the energy storage bus power is lower than the threshold, reducing the impact of the utility power switching on the stability of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the overall system structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the switching decision module structure of the present invention.

[0029] In the figure: wind turbine 10, wind power rectifier module 20, wind power switching module 30, photovoltaic unit 40, isolated power supply module 50, photoelectric switching module 60, switching decision module 70, wind power sensor unit 71, photoelectric sensor unit 72, control unit 73, load sensing unit 74, mains power supply module 80, mains power supply bus 81, mains rectifier unit 82, mains switching unit 83, bus 90, energy storage bus 91, load bus 92. DETAILED DESCRIPTION

[0030] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to specific embodiments.

[0031] It should be noted that, unless otherwise defined, the technical or scientific terms used in the present invention should have the usual meanings understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0032] Example:

[0033] See also Figure 1-Figure 2 , the present invention provides a technical solution:

[0034] A solar and wind energy centralized power supply system for a communication base station includes a wind turbine 10, a photovoltaic unit 40, and a bus 90. The bus 90 includes an energy storage bus 91 and a load bus 92 that are independent of each other, wherein:

[0035] The energy storage bus 91 and the load bus 92 are both DC buses. The energy storage bus 91 is used to connect energy storage devices such as batteries and supercapacitors, and the load bus 92 is mainly used to connect the working equipment of the communication base station and power the working equipment of the communication base station. The voltage level of the energy storage bus 91 and the load bus 92 is the same. Currently, core loads such as base station equipment and transmission equipment all use -48VDC or +24VDC DC input.

[0036] The energy storage bus 91 is connected to energy storage devices such as batteries and supercapacitors to power the energy storage devices. Energy storage devices such as batteries and supercapacitors can achieve a dynamic balance of energy and power through their complementary characteristics: batteries provide medium- and long-term stable energy storage with their high energy density, supporting the continuous power supply needs of base stations for several hours to several days; while supercapacitors use their high power density and millisecond response speed to instantly smooth out the second-level fluctuations and load mutation impacts of wind and solar power generation, avoiding frequent deep charging and discharging of batteries, and can power equipment when the city power is cut off. The switching method has been widely used in the existing technology and will not be elaborated on.

[0037] The wind turbine 10 and the wind power switching module 30 are electrically connected through the wind power rectifier module 20. The wind turbine 10 is used to convert wind energy into alternating current and then transmit it to the wind power rectifier module 20. The wind power rectifier module 20 is used to rectify the alternating current generated by the wind turbine 10 into direct current and then transmit it to the energy storage bus 91 or the load bus 92 after switching and selecting through the wind power switching module 30.

[0038] The wind power switching module 30 is essentially a single-pole double-throw switch, which is controlled by the control unit 73 and can be switched to be electrically connected to the energy storage bus 91 or to be electrically connected to the load bus 92 .

[0039] The photovoltaic group 40 and the photoelectric switching module 60 are electrically connected through the isolation power supply module 50. The photovoltaic group 40 is used to convert solar energy into direct current and then transmit it to the isolation power supply module 50. The isolation power supply module 50 is used to perform voltage conversion and voltage isolation on the direct current generated by the photovoltaic group 40, and then switch and select it through the photoelectric switching module 60 and transmit it to the energy storage bus 91 or the load bus 92.

[0040] The photoelectric switching module 60 is essentially a single-pole double-throw switch, which is controlled by the control unit 73 and can be switched to be electrically connected to the energy storage bus 91 or to be electrically connected to the load bus 92 .

[0041] The load bus 92 is also electrically connected to the mains power supply module 80 , and the mains power supply module 80 is also electrically connected to the switching decision module 70 for rectifying the mains power into alternating current under the control of the switching decision module 70 to supply power to the load bus 91 .

[0042] In this embodiment, the AC power supply module 80 includes a AC rectifier unit 82, which is used to rectify the AC power provided by the AC power supply bus 81 and transmit it to the AC switching unit 83. The output end of the AC switching unit 83 is electrically connected to the load bus 92, and the control end is electrically connected to the switching decision module 70, and is used to realize on-off switching with the load bus 92 under the control of the switching decision module 70.

[0043] The mains switching unit 83 is essentially a switch, which is controlled by the control unit 73. When closed, the load bus 92 is connected to the mains. When open, the load bus 92 is disconnected from the mains, and the mains is not used for power supply.

[0044] The control ends of the wind power switching module 30 and the photovoltaic switching module 60 are both electrically connected to the control unit 73. The control unit 73 selectively controls the outputs of the wind power switching module 30 and the photovoltaic switching module 60 to supply power to the energy storage bus 91 or the load bus 92. The control end of the AC power switching unit 83 is electrically connected to the control unit 73, and is used to realize on-off switching with the load bus 92 under the control of the control unit 73.

[0045] The output end of the wind power rectifier module 20 and the output end of the isolated power supply module 50 are also electrically connected to a switching decision module 70. The switching decision module 70 is used to collect the output power of the wind power rectifier module 20 and the isolated power supply module 50, and compare them with the output power of the load bus 92, and selectively control the output of the wind power rectifier module 20 and the output of the isolated power supply module 50 to power the energy storage bus 91 or the load bus 92.

[0046] In this embodiment, the switching decision module 70 includes a wind power sensor unit 71 and a photoelectric sensor unit 72. The wind power sensor unit 71 is electrically connected to the output of the wind power rectifier module 20 for collecting power data output by the wind power rectifier module 20. The photoelectric sensor unit 72 is electrically connected to the output of the isolation power supply module 50 for collecting power data output by the isolation power supply module 50. The output end of the load bus 92 is electrically connected to a load sensor unit 74. The load sensor unit 74 is used to collect total power data output by the load bus. The wind power sensor unit 71, the photoelectric sensor unit 72 and the load sensor unit 74 are all electrically connected to the control unit 73, and respectively send the collected power data to the control unit 73.

[0047] The core logic of this embodiment revolves around the dynamic coordination of wind and solar power generation, energy storage and allocation, and city power standby. Wind turbines and photovoltaic units serve as the main power generation units, which convert wind energy and solar energy into DC power that matches the bus voltage through the wind power rectifier module 20 and the isolation power module 50 respectively. The wind power rectifier module 20 converts the AC output of the wind turbine into DC, and the photovoltaic isolation power module 50 stabilizes and electrically isolates the DC power of the photovoltaic panel. The two lines of electricity are then connected to their respective switching modules. The switching modules serve as "energy valves" and are controlled by the control unit 73 to select in real time whether to deliver electricity to the energy storage bus 91 or the load bus 92. The energy storage bus 91 connects batteries and supercapacitors. The former is responsible for medium- and long-term energy storage, and the latter copes with instantaneous power fluctuations. The load bus 92 directly supplies power to the base station equipment, and its voltage is strictly stable within the equipment requirements. The city power supply module serves as the final guarantee layer.

[0048] The AC output of the wind turbine 10 is connected to a Vicor VI-ARM-48 three-phase wind power rectifier module 20. The specific model of the wind power rectifier module 20 is VI-ARM-48-400-48, which converts AC power into DC power. The wind power switching module 30 uses a Crydom D1D40 solid-state relay controlled by a control unit 73 through a PWM signal. In real time, according to the instructions of the switching decision module 70, the wind power energy is dynamically distributed to the energy storage bus 91 or the load bus 92. The specific model used by the control unit 73 is XCZU19EG.

[0049] The DC output of photovoltaic unit 40 is connected to Delta's DC-DC isolated power supply module, specifically model RPS-3000-48, with an input of 300-800VDC and an output of 48VDC / 62.5A, achieving voltage conversion and 3000V electrical isolation. Both the photovoltaic switching module 60 and the wind power switching module use TE Connectivity RTD48005 single-pole double-throw relays, which are controlled by the control unit 73. Combined with the photovoltaic power data collected by the photoelectric sensor unit 72, they dynamically switch to the energy storage bus 91 or the load bus 92. The photoelectric sensor unit 72 uses a LEM HAH3DR 200A Hall sensor, the wind power sensor unit 71 uses a Honeywell CSLA2CD 100A current sensor, and the load sensor unit 74 uses a TI INA226 16-bit high-precision power monitoring IC. The mains switching unit 83 uses a Schneider LC1D09 48VDC contactor, the mains rectifier unit 82 shown uses a three-phase full-bridge rectifier circuit built with Infineon FF600R12ME4 IGBT module, the mains switching unit 83 uses an ABB SACE Emax 2 circuit breaker, and the mains power supply bus 81 is the mains power supply circuit.

[0050] Furthermore, the power data collected by the wind power sensor unit 71 and the photoelectric sensor unit 72 are respectively The output power of the wind power rectifier module and the isolated power supply module 50 within the time period, where Indicates the current timestamp, Indicates the time length of the collected power data. The power data of the load sensing unit 74 is The total power data output by the load bus 92 during the time period.

[0051] In this embodiment, the specific logic of the control unit 73 controlling the wind power switching module 30, the photovoltaic switching module 60 and the mains switching unit 83 is as follows:

[0052] calculate The relationship between the total power output of the load bus 92 at the moment and the sum of the output power of the wind power rectifier module and the isolated power supply module 50 is , the wind power switching module 30 and the photovoltaic switching module 60 are both switched to be electrically connected to the energy storage bus 91, and the mains switching unit 83 is switched to the conducting state. 、 and Respectively The total power output by the load bus 92 at that moment, and the output power of the wind power rectifier module and the isolated power supply module 50;

[0053] like , calculate the past The total power output of the load bus 92 during the time length, and the ... The sum of the output powers of the wind power rectifier module and the isolated power supply module 50 within the time length is calculated based on the formula:

[0054]

[0055] in, Indicates the past The sum of the total power output by the load bus 92 within the time length, and Respectively represent the sum of the output power of the wind power rectifier module and the isolated power supply module 50, 、 and Respectively The total power output by the load bus 92 at the moment, the output power of the wind power rectifier module and the isolated power supply module 50, ;

[0056] if , the wind power switching module 30 or the photovoltaic switching module 60 or both are switched to be electrically connected to the load bus 92, and the mains switching unit 83 is switched to the disconnected state; otherwise, the wind power switching module 30 and the photovoltaic switching module 60 are both switched to be electrically connected to the energy storage bus, and the mains switching unit 83 is switched to the on state, wherein represents the risk weight, and .

[0057] In the power supply system, the risk weight is set as , is to achieve the best balance between reliability and economy: Provide redundant safety margin for the system to cope with wind and solar fluctuations, equipment delays and prediction errors, and avoid frequent switching losses under critical conditions; require that the total power of wind and solar power generation in the historical period must exceed the load demand. times, it is allowed to directly supply power to the load bus 92, so that even if the wind and solar power generation fluctuates in the short term, the load demand can still be covered; This prevents overly conservative strategies from causing waste of wind and solar resources and overcharging of energy storage. This will cause the system to be overly conservative: even if the wind and solar power generation is sufficient to cover the load demand, part of the energy is still forced to be stored in energy storage or to enable the use of mains power.

[0058] Furthermore, if ,and , the wind power switching module 30 is switched to be electrically connected to the load bus 92 , the photovoltaic switching module 60 is switched to be electrically connected to the energy storage bus 91 , and the mains switching unit 83 is switched to the disconnected state;

[0059] like ,and , the photovoltaic switching module 60 is switched to be electrically connected to the load bus 92, the wind power switching module 30 is switched to be electrically connected to the energy storage bus 91, and the mains switching unit 83 is switched to the disconnected state;

[0060] if and All less than ,and , the wind power switching module 30 and the photovoltaic switching module 60 are both switched to be electrically connected to the load bus 92, and the mains switching unit 83 is switched to the disconnected state.

[0061] This embodiment combines real-time dynamic evaluation with historical data trend analysis to achieve intelligent collaboration between wind, solar, and power storage, and the mains, ensuring power supply stability while maximizing renewable energy utilization. Rapid decisions are made based on current power relationships: when the instantaneous load power exceeds the combined wind and solar power generation, the mains power supply module 80 is activated. This mechanism effectively prevents power outages caused by sudden load increases and ensures the reliability of the system's real-time response.

[0062] When the load power can be covered by wind and solar power generation, a time window is further introduced. The integrated power comparison within is calculated by The cumulative relationship between total load demand and total wind and solar power generation over a time period, combined with risk weights, creates a double safety redundancy. This not only accounts for potential misjudgments caused by short-term fluctuations, but also provides buffer space for unforeseen factors such as equipment response delays and sudden weather changes, significantly improving the system's robustness in complex operating conditions.

[0063] The use of integral calculation rather than simple average value is essentially to judge the continuous trend of the supply and demand relationship by the accumulated energy, avoiding the interference of instantaneous power fluctuations on system switching. For example, in rainy weather with intermittent changes in sunlight, this method can smooth the random fluctuations of photovoltaic output and prevent frequent charging and discharging of the energy storage bus. At the same time, the hierarchical decision-making mechanism (giving priority to meeting real-time demand and secondly evaluating the historical supply and demand ratio) optimizes the energy distribution path: when When the system is connected, it dynamically allocates access based on the historical contribution of wind and solar power generation—preferring units with higher historical output to directly supply the load, while other units charge energy storage. This strategy not only improves the immediate absorption rate of wind and solar power, but also enables cross-timescale energy transfer through energy storage, indirectly enhancing the system's adaptability to fluctuations in wind and solar resources. The overall logic fully embodies the integration of preventive control and adaptive regulation, achieving a balance between power supply reliability and clean energy efficiency while reducing dependence on utility power.

[0064] The above formulas are all dimensionless and numerical calculations. The formulas are obtained by collecting a large amount of data and performing software simulation to obtain the most recent real situation. The preset parameters in the formulas are set by technicians in this field according to actual conditions.

[0065] The above embodiments can be implemented in whole or in part by software, hardware, firmware, or any other combination thereof. When implemented using software, the above embodiments can be implemented in whole or in part in the form of a computer program product. Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed by hardware or software depends on the specific application and design constraints of the technical solution.

[0066] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, and may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment as needed.

[0067] The above is only a specific implementation method of the present application, but the scope of protection of the present application is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed in this application, which should be covered by the scope of protection of the present application.

Claims

1. A communication base station solar and wind energy centralized power supply system, characterized in that: The invention comprises a wind turbine generator set (10), a photovoltaic generator set (40), and a busbar (90), wherein the busbar (90) comprises a mutually independent energy storage busbar (91) and a load busbar (92), and both the energy storage busbar (91) and the load busbar (92) are DC buses, wherein: The wind turbine generator set (10) and the wind power switching module (30) are electrically connected via a wind power rectifier module (20); the wind turbine generator set (10) is used to convert wind energy into alternating current and transmit the converted alternating current to the wind power rectifier module (20); the wind power rectifier module (20) is used to rectify the alternating current generated by the wind turbine generator set (10) into direct current and transmit the converted alternating current to the energy storage bus (91) or the load bus (92) after switching and selecting the converted direct current through the wind power switching module (30); The photovoltaic unit (40) and the photoelectric switching module (60) are electrically connected via an isolation power module (50); the photovoltaic unit (40) is used to convert solar energy into direct current and transmit the converted direct current to the isolation power module (50); the isolation power module (50) is used to perform voltage conversion and voltage isolation on the direct current generated by the photovoltaic unit (40), and then transmit the converted direct current to the energy storage bus (91) or the load bus (92) after switching and selecting the converted direct current through the photoelectric switching module (60); The load bus (92) is also electrically connected to a mains power supply module (80), and the mains power supply module (80) is also electrically connected to a switching decision module (70) for rectifying the mains power into alternating current under the control of the switching decision module (70) to supply power to the load bus (91); The output end of the wind power rectifier module (20) and the output end of the isolated power supply module (50) are also electrically connected to a switching decision module (70), and the switching decision module (70) is used to collect the output power of the wind power rectifier module (20) and the isolated power supply module (50), and compare it with the output power of the load bus (92), and selectively control the output of the wind power rectifier module (20) and the output of the isolated power supply module (50) to supply power to the energy storage bus (91) or the load bus (92); The control ends of the wind power switching module (30) and the photoelectric switching module (60) are electrically connected to the control unit (73), and the control end of the mains power switching unit (83) is electrically connected to the control unit (73); The specific logic of the control unit (73) controlling the wind power switching module (30), the photovoltaic switching module (60) and the mains power switching unit (83) is as follows: calculate The relationship between the total power output by the load bus (92) at the moment and the sum of the output powers of the wind power rectifier module and the isolation power module (50) is: , the wind power switching module (30) and the photovoltaic switching module (60) are both switched to be electrically connected to the energy storage bus (91), and the mains switching unit (83) is switched to the conducting state, 、 and Respectively The total power output by the load bus (92) at each moment, and the output power of the wind power rectifier module and the isolated power supply module (50); like , calculate the past The sum of the total power output from the load bus (92) during the time length, and the past The sum of the output powers of the wind power rectifier module and the isolation power supply module (50) within the time length is calculated based on the formula: in, Indicates the past The sum of the total power output by the load bus (92) within the time length, and represent the sum of the output powers of the wind power rectifier module and the isolated power supply module (50), respectively. 、 and Respectively The total power output by the load bus (92) at the moment, the output power of the wind power rectifier module and the isolation power supply module (50), ; if , the wind power switching module (30) or the photovoltaic switching module (60) or both are switched to be electrically connected to the load bus (92), and the mains switching unit (83) is switched to the disconnected state; otherwise, the wind power switching module (30) and the photovoltaic switching module (60) are both switched to be electrically connected to the energy storage bus, and the mains switching unit (83) is switched to the on state, wherein represents the risk weight, and ; if ,and , the wind power switching module (30) is switched to be electrically connected to the load bus (92), the photovoltaic switching module (60) is switched to be electrically connected to the energy storage bus (91), and the mains switching unit (83) is switched to a disconnected state; like ,and , the photoelectric switching module (60) is switched to be electrically connected to the load bus (92), the wind power switching module (30) is switched to be electrically connected to the energy storage bus (91), and the mains switching unit (83) is switched to an open circuit state; if and All less than ,and , the wind power switching module (30) and the photovoltaic switching module (60) are both switched to be electrically connected to the load bus (92), and the mains switching unit (83) is switched to the disconnected state.

2. A communication base station solar and wind energy centralized power supply system according to claim 1, characterized in that: The mains power supply module (80) includes a mains rectifier unit (82), which is used to rectify the mains AC power provided by the mains power supply bus (81) and transmit it to the mains switching unit (83). The output end of the mains switching unit (83) is electrically connected to the load bus (92), and the control end is electrically connected to the switching decision module (70), and is used to realize on-off switching with the load bus (92) under the control of the switching decision module (70).

3. The communication base station solar and wind energy centralized power supply system according to claim 2, characterized in that: The switching decision module (70) includes a wind power sensing unit (71) and a photoelectric sensing unit (72). The wind power sensing unit (71) is electrically connected to the output of the wind power rectifier module (20) and is used to collect power data output by the wind power rectifier module (20). The photoelectric sensing unit (72) is electrically connected to the output of the isolation power module (50) and is used to collect power data output by the isolation power module (50). The output end of the load bus (92) is electrically connected to a load sensing unit (74). The load sensing unit (74) is used to collect total power data output by the load bus. The wind power sensing unit (71), the photoelectric sensing unit (72) and the load sensing unit (74) are all electrically connected to the control unit (73) and respectively send the collected power data to the control unit (73).

4. A communication base station solar and wind energy centralized power supply system according to claim 3, characterized in that: The control unit (73) selectively controls the outputs of the wind power switching module (30) and the photovoltaic switching module (60) to supply power to the energy storage bus (91) or the load bus (92). The control end of the mains power switching unit (83) is electrically connected to the control unit (73) for realizing on-off switching with the load bus (92) under the control of the control unit (73).

5. The communication base station solar and wind energy centralized power supply system according to claim 4, characterized in that: The power data collected by the wind power sensor unit (71) and the photoelectric sensor unit (72) are The output power of the wind power rectifier module and the isolated power supply module (50) within the time period, wherein Indicates the current timestamp, Indicates the time length of the collected power data. The power data of the load sensing unit (74) is The total power data output by the load bus (92) during the time period.

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