Solar energy and wind energy centralized power supply system for communication base station

Abstract

The invention provides a solar energy and wind energy centralized power supply system for a communication base station, and relates to the technical field of multi-path energy power supply management. According to a double-bus architecture design, an energy storage bus and a load bus form a physically isolated independent loop, and cooperative control of a wind power switching module and a photoelectric switching module is matched, so that the power supply efficiency is improved; the switching decision-making module compares wind power and photovoltaic output power with load requirements in real time, and by dynamically switching a power supply path energy storage bus or a load bus, maximum local consumption of renewable energy generating capacity can be realized, the utilization rate of commercial power is reduced, and the utilization rate of the commercial power is improved. Electric energy output by the wind power rectification module and the isolation power supply module can be directly injected into a load bus through the wind power switching module and the photoelectric switching module, and the real-time load requirement is met preferentially.

Description

Technical Field

[0001] The 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 communication networks, the reliability of power supply of communication base stations directly affects the quality of communication services. In remote mountainous areas, islands and other areas with weak grid coverage, the use of wind-solar complementary power supply systems has become an important solution. Existing technologies usually connect wind power generation and photovoltaic power generation equipment in parallel to the same bus, and use rectifiers and energy storage systems to power the loads, and use energy storage batteries to buffer intermittent power, and switch to grid backup when wind and solar power generation is insufficient.

[0003] A single busbar architecture is adopted to connect wind and solar power generation equipment and energy storage systems directly in parallel on the same busbar, and the electric energy output by wind turbines and photovoltaic panels is unified into a single busbar. After rectification / voltage stabilization, it is preferentially stored in the battery pack, and then the energy storage system supplies power to the load. This architecture requires wind energy and light energy to go through the energy storage link before they can be used. When the light and wind conditions fluctuate, it is easy to generate secondary losses of electricity "storing first and then releasing", and the capacity limitation of the energy storage system forces the city power to frequently intervene to supplement the power. Especially when the intermittent nature of wind and solar resources is strong, it is difficult for the existing system to achieve real-time power balance between the power generation side and the load side, and a large amount of wind and solar energy is wasted in the storage-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 constitute the prior art that is already known to one 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 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 communication base station solar wind energy centralized power supply system includes a wind turbine unit, a photovoltaic unit and a bus bar, wherein the bus bar includes a mutually independent energy storage bus bar and a load bus bar, wherein

[0008] The wind turbine set and the wind power switching module are electrically connected via a wind power rectifier module. The wind turbine 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 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, and the mains power supply module is also electrically connected to a switching decision module, and is used to rectify the mains power into alternating current to supply power to the load bus under the control of the switching decision module;

[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 sensor unit and a photoelectric sensor unit. The wind power sensor unit is electrically connected to the output of the wind power rectifier module for collecting power data output by the wind power rectifier module. The photoelectric sensor unit is electrically connected to the output of the isolation power supply module for collecting power data output by the isolation power supply module. The output end of the load bus is electrically connected to a load sensor unit, which is used to collect total power data output by the load bus. The wind power sensor unit, the photoelectric sensor unit and the load sensor unit are all electrically connected to the control unit, and the collected power data are sent 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, and the control end of the AC power switching unit is electrically connected to the control unit for realizing on-off switching with the load bus under the control of the control unit.

[0015] Further, the power data collected by the wind power sensing unit and the optoelectronic sensing unit are respectively the output powers of the wind power rectification module and the isolated power supply module within the time period [t0 - T, t0], where t0 represents the current timestamp and T represents the time length of the collected power data. The power data of the load sensing unit is the total power data output by the load bus within the time period [t0 - T, t0].

[0016] Further, the specific logic for the control unit to control the wind power switching module, the optoelectronic switching module, and the mains switching unit is as follows:

[0017] Calculate the relationship between the total power output by the load bus at time t and the sum of the output powers of the wind power rectification module and the isolated power supply module. If then both the wind power switching module and the optoelectronic switching module are switched to be electrically connected to the energy storage bus, and the mains switching unit is switched to the conducting state. and respectively represent the total power output by the load bus at time t0, the output powers of the wind power rectification module and the isolated power supply module.

[0018] If Calculate the sum of the total power output by the load bus within the past time length T, and the sum of the output powers of the wind power rectification module and the isolated power supply module within the past time length T. The formulas for calculation are as follows:

[0019]

[0020] where Pm T represents the sum of the total power output by the load bus within the past time length T, Pf T and Pg T respectively represent the sum of the output powers of the wind power rectification module and the isolated power supply module. Pm t , Pf t and Pg t respectively represent the total power output by the load bus at time t, the output powers of the wind power rectification module and the isolated power supply module, where t ∈ [t0 - T, t0].

[0021] If α * Pm T ≤ Pf T + Pg T , then the wind power switching module or the optoelectronic switching module or both are switched to be electrically connected to the load bus, and the mains switching unit is switched to the open state. Otherwise, both the wind power switching module and the optoelectronic switching module are switched to be electrically connected to the energy storage bus, and the mains switching unit is switched to the conducting state, where α represents the risk weight and 1 < α < 2.

[0022] Further, if α * Pm T ≤ Pf T, and Pf T >Pg T , the wind power switching module switches to be electrically connected to the load bus, the photovoltaic switching module switches to be electrically connected to the energy storage bus, and the mains switching unit switches to the open circuit state;

[0023] If Pm T ≤Pg T , and Pf T ≤Pg T , the photovoltaic switching module switches to be electrically connected to the load bus, the wind power switching module switches to be electrically connected to the energy storage bus, and the mains switching unit switches to the open circuit state;

[0024] If Pf T and Pg T are both less than α*Pm T , and α*Pm T ≤Pf T +Pg T , then both the wind power switching module and the photovoltaic switching module switch to be electrically connected to the load bus, and the mains switching unit switches to the open circuit state.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] According to the present invention, through the design of a dual-bus architecture, the energy storage bus and the load bus form physically isolated independent circuits. With the coordinated control of the wind power switching module and the photovoltaic switching module, the switching decision module compares the output powers of wind power and photovoltaic with the load demand in real time. By dynamically switching the power supply path between the energy storage bus and the load bus, the maximum in-situ consumption of renewable energy power generation can be achieved, the usage rate of the mains power is reduced, and the electric energy output by the wind power rectification module and the isolation power supply module can be directly injected into the load bus through the wind power switching module and the photovoltaic switching module to preferentially meet the real-time load demand. The switching decision module compares the output power of wind power / photovoltaic with the load demand in real time. When the total power of wind and light continuously covers the load demand, the mains power supply module is in the offline state; only when the wind and light power generation is insufficient and the power of the energy storage bus is lower than the threshold, the mains power supply is started to supplement the power, reducing the impact of mains switching on the stability of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall system structure of the present invention;

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

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

[0030] To make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below in conjunction with specific embodiments.

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

[0032] Embodiment:

[0033] Please refer to Figure 1 - Figure 2 , the present invention provides a technical solution:

[0034] A solar and wind energy centralized power supply system for communication base stations, including a wind turbine 10, a photovoltaic unit 40 and a bus 90. The bus 90 includes an independent energy storage bus 91 and a load bus 92, where

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

[0036] The energy storage bus 91 is connected to energy storage devices such as batteries and supercapacitors to supply power to the energy storage devices. The energy storage devices such as batteries and supercapacitors can achieve dynamic balance of energy and power through complementary characteristics: the battery provides medium- and long-term stable energy storage with high energy density, supporting the continuous power supply demand of the base station for several hours to several days; while the supercapacitor instantaneously suppresses the second-level fluctuations of wind and solar power generation and load mutation impacts with high power density and millisecond-level response speed, avoiding frequent deep charge and discharge of the battery, and can also supply power to the equipment when the mains power is cut off. The switching method has been widely used in the existing technology and will not be elaborated here.

[0037] The wind turbine 10 and the wind power switching module 30 are electrically connected through the wind power rectification module 20. The wind turbine 10 is used to convert wind energy into alternating current and then transmit it to the wind power rectification module 20. The wind power rectification 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 selection 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 unit 40 and the photovoltaic power switching module 60 are electrically connected through the isolation power module 50. The photovoltaic unit 40 is used to convert solar energy into direct current and then transmit it 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 it to the energy storage bus 91 or the load bus 92 after switching selection through the photovoltaic power switching module 30.

[0040] The photovoltaic power switching module 60 is also 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. The mains power supply module 80 is also electrically connected to the switching decision module 70 and is used to rectify the mains power into alternating current to supply power to the load bus 91 under the control of the switching decision module 70.

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

[0043] The mains power switching unit 83 is essentially a switch controlled by the control unit 73. When closed, it connects the load bus 92 to the mains power. When open, it disconnects the load bus 92 from the mains power and does not supply power using the mains power.

[0044] The control terminals of the wind power switching module 30 and the photovoltaic power 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 power switching module 60 to supply power to the energy storage bus 91 or the load bus 92. The control terminal of the mains power switching unit 83 is electrically connected to the control unit 73 and is used to achieve the on-off switching with the load bus 92 under the control of the control unit 73.

[0045] The output terminals of the wind power rectification module 20 and the isolation 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 powers of the wind power rectification module 20 and the isolation power supply module 50, compare them with the output power of the load bus 92, and selectively control the outputs of the wind power rectification module 20 and the isolation power supply module 50 to supply power to the energy storage bus 91 or the load bus 92.

[0046] In this embodiment, the switching decision module 70 includes a wind power sensing unit 71 and a photovoltaic power sensing unit 72. The wind power sensing unit 71 is electrically connected to the output of the wind power rectification module 20 and is used to collect the power data output by the wind power rectification module 20. The photovoltaic power sensing unit 72 is electrically connected to the output of the isolation power supply module 50 and is used to collect the power data output by the isolation power supply module 50. The output terminal of the load bus 92 is electrically connected to a load sensing unit 74. The load sensing unit 74 is used to collect the total power data output by the load bus. The wind power sensing unit 71, the photovoltaic power 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.

[0047] The core logic of this embodiment revolves around the dynamic coordination of wind-solar power generation, energy storage allocation, and utility power backup. Wind turbines and photovoltaic units, as the main power generation units, respectively convert wind energy and solar energy into direct current matching the bus voltage through the wind power rectification module 20 and the isolated power supply module 50. The wind power rectification module 20 converts the AC output of the wind turbine into DC, while the photovoltaic isolated power supply module 50 stabilizes the voltage and performs electrical isolation on the DC power of the photovoltaic panel. The two paths of electric energy are then connected to their respective switching modules. The switching module, as an "energy valve", is controlled by the control unit 73 and selectively delivers electric energy to the energy storage bus 91 or the load bus 92 in real time. The energy storage bus 91 is connected to a battery and a supercapacitor. The former is responsible for medium- and long-term energy storage, and the latter responds to instantaneous power fluctuations. The load bus 92 directly supplies power to the base station equipment, and its voltage is strictly stabilized within the equipment demand range. The utility power supply module serves as the ultimate guarantee layer.

[0048] The AC output of the wind turbine 10 is connected to the Vicor VI-ARM-48 three-phase wind power rectification module 20. The specific model of the wind power rectification module 20 is VI-ARM-48-400-48. This module converts AC into DC. The wind power switching module 30 selects the Crydom D1D40 solid-state relay and is controlled by the control unit 73 through PWM signals. According to the instructions of the switching decision module 70 in real time, it dynamically distributes the wind power energy to the energy storage bus 91 or the load bus 92. The specific model of the control unit 73 is XCZU19EG.

[0049] The DC output of the photovoltaic unit 40 is connected to the Delta DC-DC isolated power supply module, with the specific model being RPS-3000-48. It inputs 300 - 800VDC and outputs 48VDC / 62.5A to achieve voltage conversion and 3000V electrical isolation. Both the photovoltaic switching module 60 and the wind power switching module use the TE Connectivity RTD48005 single-pole double-throw relay, which is controlled by the control unit 73. Combining the photovoltaic power data collected by the photovoltaic sensing unit 72, it dynamically switches to the energy storage bus 91 or the load bus 92. The photovoltaic sensing unit 72 uses the LEM HAH3DR 200A Hall sensor, the wind power sensing unit 71 uses the Honeywell CSLA2CD 100A current sensor, the load sensing unit 74 uses the 16-bit high-precision power monitoring IC of the model TI INA226, the utility power switching unit 83 uses the Schneider LC1D09 48VDC contactor, the utility power rectification unit 82 uses a three-phase full-bridge rectification circuit built with the Infineon FF600R12ME4 IGBT module, the ABB SACE Emax 2 circuit breaker of the utility power switching unit 83, and the utility power supply bus 81 is the power supply circuit of the utility power.

[0050] Further, the power data collected by the wind power sensing unit 71 and the optoelectronic sensing unit 72 are respectively the output powers of the wind power rectification module and the isolated power supply module 50 during the time period [t0 - T, t0], where t0 represents the current timestamp and T represents 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 [t0 - T, t0].

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

[0052] Calculate the relationship between the total power output by the load bus 92 at time t0 and the sum of the output powers of the wind power rectification module and the isolated power supply module 50. If then both the wind power switching module 30 and the optoelectronic switching module 60 are 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 represent the total power output by the load bus 92 at time t0, the output powers of the wind power rectification module and the isolated power supply module 50.

[0053] If Calculate the sum of the total powers output by the load bus 92 during the past T time length, and the sum of the output powers of the wind power rectification module and the isolated power supply module 50 during the past T time length. The calculation formula is:

[0054]

[0055] where, Pm T represents the sum of the total powers output by the load bus 92 during the past T time length, Pf T and Pg T respectively represent the sum of the output powers of the wind power rectification module and the isolated power supply module 50. Pm t 、Pf t and Pg t respectively represent the total power output by the load bus 92 at time t, the output powers of the wind power rectification module and the isolated power supply module 50, where t ∈ [t0 - T, t0].

[0056] If α * Pm T ≤ Pf T + Pg T , then the wind power switching module 30 or the optoelectronic 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 open state. Otherwise, both the wind power switching module 30 and the optoelectronic switching module 60 are switched to be electrically connected to the energy storage bus, and the mains switching unit 83 is switched to the conducting state, where α represents the risk weight and 1 < α < 2.

[0057] In the power supply system, the risk weight is set to 1 < α < 2 to achieve an optimal balance between reliability and economy: 1 < α provides a redundant safety margin for the system to cope with fluctuations in wind and light, equipment delays, and prediction errors, and avoids frequent switching losses in critical states; it is required that the total power of wind and light power generation in the historical time period exceeds α times the load demand before it is allowed to directly supply power to the load bus 92. In this way, even if there are short-term fluctuations in wind and light power generation, the load demand can still be covered; α < 2 prevents waste of wind and light resources and overcharging of energy storage caused by overly conservative strategies. An overly high α will cause the system to be overly conservative: even if the wind and light power generation is sufficient to cover the load demand, some energy is still forced to be stored in the energy storage or the mains power is enabled.

[0058] Furthermore, if α·Pm T ≤Pf T and Pf T >Pg T , the wind power switching module 30 switches to be electrically connected to the load bus 92, the photovoltaic switching module 60 switches to be electrically connected to the energy storage bus 91, and the mains power switching unit 83 switches to the open state;

[0059] If Pm T ≤Pg T and Pf T ≤Pg T , the photovoltaic switching module 60 switches to be electrically connected to the load bus 92, the wind power switching module 30 switches to be electrically connected to the energy storage bus 91, and the mains power switching unit 83 switches to the open state;

[0060] If Pf T and Pg T are both less than α*Pm T and α*Pm T ≤Pf T +Pg T , then both the wind power switching module 30 and the photovoltaic switching module 60 switch to be electrically connected to the load bus 92, and the mains power switching unit 83 switches to the open state.

[0061] This embodiment realizes the intelligent coordination of wind-solar energy storage and mains power through a combination of real-time dynamic evaluation and historical data trend analysis, maximizing the utilization rate of renewable energy while ensuring power supply stability. Quick decisions are made based on the power relationship at the current moment: when the instantaneous power of the load exceeds the sum of wind and light power generation, the mains power supply module 80 is enabled to supply power. This mechanism effectively prevents power supply interruptions caused by sudden increases in load 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, the integral power comparison within the time window T is further introduced. By calculating the cumulative relationship between the total load demand and the total wind and solar power generation within the T time period and superimposing the risk weights, a dual safety redundancy is constructed. It not only considers the misjudgment that may be caused by short-term fluctuations but also reserves a buffer space for unforeseen factors such as equipment response delays and sudden weather changes, significantly enhancing the robustness of the system to cope with complex working conditions.

[0063] Using integral calculation instead of simple average, essentially, it judges the continuous trend of the supply-demand relationship through the energy accumulation, 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 the energy storage bus from charging and discharging frequently. At the same time, the hierarchical decision-making mechanism (prioritizing to meet real-time demand and then evaluating the historical supply-demand ratio) optimizes the energy distribution path: when α*Pm T ≤Pf T +Pg T According to the historical contribution degree of wind and solar power generation, the access method is dynamically allocated - preferentially select the power generation unit with higher historical output to directly supply the load, and the other unit charges the energy storage. This strategy not only improves the immediate consumption rate of wind and solar power generation but also realizes the energy transfer across time scales through the energy storage medium, indirectly enhancing the system's adaptability to the fluctuations of wind and solar resources. The construction of the overall logic fully reflects the integration of preventive control and adaptive regulation, achieving a balance between power supply reliability and clean energy utilization efficiency while reducing the dependence on the municipal power grid.

[0064] The above formulas are all dimensionless and take their numerical values for calculation. The formulas are obtained by collecting a large amount of data for software simulation to get a formula closest to the real situation. The preset parameters in the formulas are set by those skilled in the art according to the actual situation.

[0065] The above embodiments can be implemented in whole or in part by software, hardware, firmware, or any other combination. 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 can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or by a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software methods 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 separated, and the components shown as units may or may not be physical units. They can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0067] As described above, it is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed by this application can easily think of changes or substitutions, which should all be covered within the protection scope of this application.

Claims

1. A centralized power supply system for a communication base station using solar and wind energy, characterized in that, It includes a wind turbine unit (10), a photovoltaic unit (40), and a bus bar (90). The bus bar (90) includes an independent energy storage bus bar (91) and a load bus bar (92), where the wind turbine unit (10) is electrically connected to the wind power switching module (30) through the wind power rectification module (20). The wind turbine unit (10) is used to convert wind energy into alternating current and then transmit it to the wind power rectification module (20). The wind power rectification module (20) is used to rectify the alternating current generated by the wind turbine unit (10) into direct current and then, after switching selection through the wind power switching module (30), transmit it to the energy storage bus bar (91) or the load bus bar (92); the photovoltaic unit (40) is electrically connected to the photovoltaic power switching module (60) through the isolation power supply module (50). The photovoltaic unit (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 unit (40) and then, after switching selection through the photovoltaic power switching module (30), transmit it to the energy storage bus bar (91) or the load bus bar (92); the load bus bar (92) is also electrically connected to a mains power supply module (80). The mains power supply module (80) is also electrically connected to the switching decision-making module (70) and is used to rectify the mains power into alternating current to supply power to the load bus bar (91) under the control of the switching decision-making module (70); the output ends of the wind power rectification module (20) and the isolation power supply module (50) are also electrically connected to the switching decision-making module (70). The switching decision-making module (70) is used to collect the output powers of the wind power rectification module (20) and the isolation power supply module (50), compare them with the output power of the load bus bar (92), and selectively control the outputs of the wind power rectification module (20) and the isolation power supply module (50) to supply power to the energy storage bus bar (91) or the load bus bar (92).

2. The centralized power supply system for a communication base station using solar and wind energy according to claim 1, wherein: The mains power supply module (80) includes a mains power rectification unit (82). The mains power rectification unit (82) is used to rectify the mains alternating current provided by the mains power supply bus bar (81) and then transmit it to the mains power switching unit (83). The output end of the mains power switching unit (83) is electrically connected to the load bus bar (92), and the control end is electrically connected to the switching decision-making module (70) and is used to realize the on-off switching with the load bus bar (92) under the control of the switching decision-making module (70).

3. The centralized power supply system for a communication base station using solar and wind energy according to claim 2, characterized in that: The switching decision module (70) includes a wind power sensing unit (71) and a photovoltaic sensing unit (72). The wind power sensing unit (71) is electrically connected to the output of the wind power rectification module (20) and is used to collect the power data output by the wind power rectification module (20). The photovoltaic sensing unit (72) is electrically connected to the output of the isolated power supply module (50) and is used to collect the power data output by the isolated power supply module (50). The output end of the load bus (92) is electrically connected with a load sensing unit (74), and the load sensing unit (74) is used to collect the total power data output by the load bus. The wind power sensing unit (71), the photovoltaic 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 solar and wind energy centralized power supply system for a communication base station according to claim 3, characterized in that: 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 mains switching unit (83) is electrically connected to the control unit (73) and is used to realize the on-off switching with the load bus (92) under the control of the control unit (73).

5. The centralized power supply system for a communication base station using solar and wind energy according to claim 4, characterized in that: The power data collected by the wind power sensing unit (71) and the photovoltaic sensing unit (72) are respectively the output powers of the wind power rectification module and the isolated power supply module (50) in the time period [t0 - T, t0], where t0 represents the current time stamp and T represents 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) in the time period [t0 - T, t0].

6. A solar and wind energy centralized power supply system for a communication base station according to claim 5, characterized in that: The specific logic for the control unit (73) to control the wind power switching module (30), the photovoltaic switching module (60) and the mains switching unit (83) is as follows: Calculate the relationship between the total power output by the load bus bar (92) at time t0 and the sum of the output powers of the wind power rectification module and the isolated power supply module (50). If then both the wind power switching module (30) and the photovoltaic switching module (60) are switched to be electrically connected to the energy storage bus bar (91), and the mains switching unit (83) is switched to the conducting state. And respectively represent the total power output by the load bus bar (92) at time t0, the output powers of the wind power rectification module and the isolated power supply module (50). If Calculate the sum of the total power output by the load bus (92) within the past time length T, and the sum of the output powers of the wind power rectification module and the isolated power supply module (50) within the past time length T. The calculation is based on the following formula: Among them, Pm T represents the sum of the total power output by the load busbar (92) within the past time length T, Pf T and Pg T respectively represent the sum of the output powers of the wind power rectification module and the isolated power supply module (50), Pm t , Pf t and Pg t respectively represent the total power output by the load busbar (92), the output powers of the wind power rectification module and the isolated power supply module (50) at time t, where t ∈ [t0 - T, t0]; If it is α*Pm T ≤Pf T +Pg T , then the wind power switching module (30) or the photovoltaic power switching module (60) or both jointly switch to be electrically connected to the load busbar (92), and the mains switching unit (83) switches to the open state. Otherwise, both the wind power switching module (30) and the photovoltaic power switching module (60) switch to be electrically connected to the energy storage busbar, and the mains switching unit (83) switches to the conducting state, where α represents the risk weight and 1 < α < 2.

7. A centralized power supply system for a communication base station using solar and wind energy, as claimed in claim 6, wherein: If it is α*Pm T ≤Pf T , and Pf T >Pg T , the wind power switching module (30) switches to be electrically connected to the load bus (92), the photovoltaic switching module (60) switches to be electrically connected to the energy storage bus (91), and the mains switching unit (83) switches to the open circuit state; If Pm T ≤Pg T , and Pf T ≤Pg T , the optoelectronic switching module (60) switches to be electrically connected to the load bus (92), the wind power switching module (30) switches to be electrically connected to the energy storage bus (91), and the mains switching unit (83) switches to an open circuit state; If Pf T and Pg T are both less than α*Pm T , and α*Pm T ≤Pf T +Pg T , then both the wind power switching module (30) and the photovoltaic power switching module (60) are jointly switched to be electrically connected to the load busbar (92), and the mains power switching unit (83) is switched to the open state.

Images