All-weather photovoltaic power supply system and method

Abstract

The present invention relates to the technical field of photovoltaic power supply, and particularly relates to an all-weather photovoltaic power supply system and method. The power supply system comprises a photovoltaic assembly, a low-light collection assembly and a control assembly, wherein the photovoltaic assembly is used for implementing photoelectric conversion by relying on direct light; the low-light collection assembly is used for collecting and storing low-light electric energy output by the photovoltaic assembly; and the control assembly is used for controlling electric energy output by the low-light collection assembly. In the present invention, the low-light collection assembly is added between the photovoltaic assembly and the control assembly, and the low-light collection assembly uses the characteristics of a supercapacitor, such as a long cycle life, no voltage plateau and an instantaneous large current, to collect light sources and convert same into electric energy even in low-light environments such as nighttime, cloudy days and rainy days, so as to output the electric energy to the control assembly, thereby not only improving the utilization rate of the light sources, but also greatly improving the photoelectric conversion rate.

Description

All-weather photovoltaic power supply system and method TECHNICAL FIELD

[0001] The present application relates to the field of photovoltaic power generation, and in particular to an all-weather photovoltaic power supply system and method. BACKGROUND

[0002] With the increasingly prominent energy crisis, clean and renewable energy generation technologies such as photovoltaic power generation are being applied more and more widely. Due to the natural complementarity of light resources, photovoltaic complementary power generation has great development prospects. In a photovoltaic power supply system, each power generation unit can be independently controlled or work in coordination, and the power supply safety and reliability are relatively high, which can provide uninterrupted power for communication facilities and residential life in remote areas such as deserts and plateaus.

[0003] Photovoltaic power generation is affected by the intensity of sunlight. Since the change of sunlight in nature is unpredictable, the power output of a photovoltaic power generation system is unstable, and a certain capacity of energy storage device is usually required to compensate for the power to maintain stable output. In addition, when extreme bad weather, night, and other conditions occur, the system may stop supplying power to the user, and the waste of light energy will occur. If there is no backup energy support, some important and sensitive equipment will not work normally. SUMMARY

[0004] Other features and advantages of the present application will be set forth in the following specification, and in part will become apparent to those skilled in the art upon examination of the specification or can be learned by practice of the application. The objects and other advantages of the application can be realized and attained by the structure particularly pointed out in the specification as well as the appended drawings.

[0005] The present application aims to overcome the above-mentioned deficiencies, and provides an all-weather photovoltaic power supply system and method.

[0006] The present application provides an all-weather photovoltaic power supply system, comprising

[0007] a photovoltaic assembly for realizing photoelectric conversion by means of direct light;

[0008] a weak light collection assembly for collecting and storing weak light electric energy output by the photovoltaic assembly,

[0009] a control assembly for controlling the electric energy output by the weak light collection assembly.

[0010] In some embodiments, the weak light collection assembly comprises a super capacitor module and a detection device, the super capacitor module comprises a plurality of super capacitors, and the detection device is used to detect the output power of the super capacitor module to control the charging and discharging of the super capacitor module.

[0011] In some embodiments, when the detecting device detects that the output power of the super capacitor module rises and rises to the upper limit value of the optimal input power range of the control component, the super capacitor module starts discharging.

[0012] In some embodiments, when the detecting device detects that the output power of the super capacitor module falls and falls within the optimal input power range of the control component, the super capacitor module continues discharging.

[0013] In some embodiments, when the detecting device detects that the output power of the super capacitor module falls and falls to the lower limit value of the optimal input power range of the control component, the super capacitor module stops discharging and charges again.

[0014] In some embodiments, the initial charging voltage of the super capacitor module is 0V.

[0015] In some embodiments, the weak light collecting component further comprises a stabilizing device for improving and stabilizing the output power of the super capacitor module.

[0016] In some embodiments, the super capacitor module comprises a plurality of super capacitors, each of which is connected in series or / and in parallel with each other.

[0017] In some embodiments, the control component is an inverter.

[0018] The present application also provides a full-time photovoltaic power supply method, which is performed by using the system described above, and the method comprises

[0019] Step S1, obtaining the real-time output power of the super capacitor module;

[0020] Step S2, judging the real-time state of the output power of the super capacitor module;

[0021] Step S3, controlling the charging and discharging of the super capacitor module according to the real-time state of the output power of the super capacitor module.

[0022] In some embodiments, step S2, judging the real-time state of the output power of the super capacitor module, specifically comprises

[0023] judging whether the real-time output power of the super capacitor module is within the optimal input power range of the control component and the change trend of the real-time output power of the super capacitor module, so as to obtain the real-time state of the output power of the super capacitor module.

[0024] In some embodiments, the real-time state of the output power of the super capacitor module includes a first state, a second state and a third state,

[0025] When the detection device detects that the output power of the super capacitor module rises and rises to the upper limit value of the optimal input power range of the control component, the output power of the super capacitor module is in the first state;

[0026] When the detection device detects that the output power of the super capacitor module decreases and is within the optimal input power range of the control component, the output power of the super capacitor module is in the second state;

[0027] When the detection device detects that the output power of the super capacitor module decreases and decreases to the lower limit value of the optimal input power range of the control component, the output power of the super capacitor module is in the third state.

[0028] In some embodiments, step S3, controlling the charging and discharging of the super capacitor module according to the real-time state of the output power of the super capacitor module, specifically

[0029] If the output power of the super capacitor module is in the first state, control the super capacitor module to start discharging and start supplying power to the control component;

[0030] If the output power of the super capacitor module is in the second state, control the super capacitor module to continue discharging and continue supplying power to the control component;

[0031] If the output power of the super capacitor module is in the third state, control the super capacitor module to stop discharging and charging again, and stop supplying power to the control component.

[0032] By adopting the technical scheme, the present application has the following beneficial effects:

[0033] The present application increases a weak light collecting component between the photovoltaic component and the control component. The weak light collecting component utilizes the long cycle life, no voltage platform and instantaneous large current of the super capacitor to realize the collection and conversion of light into electric energy in strong light environment and weak light environment (night, cloudy day, rainy day, etc.), thereby improving the utilization rate of light source and greatly improving the photoelectric conversion rate. In addition, the present application further provides a detection device for detecting the output power of the photovoltaic component and the super capacitor, so as to control the power supply path of the photovoltaic component and effectively control the charging and discharging of the super capacitor.

[0034] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0035] It will become readily apparent to those skilled in this art that the above stated object and other objects, features and advantages of the present application will become readily apparent after reading the foregoing specification, together with the detailed description of the preferred embodiment which follows, when considered in connection with the accompanying drawings.

[0036] In order to make the above and other objects, features and advantages of the present application more comprehensible, one or more preferred embodiments will be described in detail hereafter with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0037] The accompanying drawings are included to provide a further understanding of the present application and are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and together with the description serve to explain the present application. In the drawings:

[0038] In the drawings, like numerals describe similar components throughout the several views, and the use of "up", "down", "right" and "left" in the description that follow refer to the orientation of the device as shown in the drawings.

[0039] In order to make the above and other objects, features and advantages of the present application more comprehensible, one or more preferred embodiments will be described in detail hereafter with reference to the accompanying drawings.

[0040] Fig. 1 is a schematic diagram of an all-weather photovoltaic power supply system according to some embodiments of the present application;

[0041] Fig. 2 is another schematic diagram of an all-weather photovoltaic power supply system according to some embodiments of the present application;

[0042] Fig. 3 is a schematic diagram of a power supply process of an all-weather photovoltaic power supply system according to some embodiments of the present application. DETAILED DESCRIPTION

[0043] In order to make the above and other objects, features and advantages of the present application more comprehensible, one or more preferred embodiments will be described in detail hereafter with reference to the accompanying drawings.

[0044] In addition, in the description of the present application, it needs to be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0045] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements. However, it is noted that direct connection means that the connection between the two main bodies does not form a connection relationship through a transition structure, but is connected only through a connection structure to form a whole. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. In the description of the present application, the description referring to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. SUMMARY

[0047] With the increasing prominence of energy crisis, clean and renewable energy generation technologies such as photovoltaic power generation are being applied more and more widely. Due to the natural complementarity of light resources, photovoltaic power generation complementary power generation has great development prospects. Each power generation unit in a photovoltaic power supply system can be independently controlled and also can work coordinately, and the power supply safety and reliability is relatively high, and can provide uninterrupted power for communication facilities and residential life in remote areas such as deserts and plateaus.

[0048] Photovoltaic (PV) power generation systems are gaining increasing attention as a clean energy source. Grid-connected PV systems are those connected to the local power grid. Currently, grid-connected PV systems are widely installed on urban rooftops. However, the power output of grid-connected PV systems is naturally fluctuating due to environmental factors such as weather conditions, temperature, and sunlight intensity. In other words, the output power of PV systems is often random and intermittent. Therefore, the output power of PV systems cannot fully meet the input power requirements of electrical equipment, especially in low-light environments such as nighttime, cloudy days, and rainy days. This can lead to equipment malfunctions and significant waste of light resources.

[0049] Therefore, a photovoltaic power generation system needs to be equipped with an energy storage tank to collect light sources in low-light environments such as nighttime, cloudy days, and rainy days, and convert them into electrical energy to improve the photoelectric conversion efficiency. In other words, equipping the system with an energy storage tank is a technical problem that urgently needs to be solved.

[0050] Supercapacitors are a new type of energy storage device that combines the advantages of traditional capacitors and batteries. They utilize the double electric layer at the interface between the electrodes and the electrolyte for energy storage. They possess both the rapid charging and discharging capabilities of capacitors and the energy storage characteristics of batteries. Furthermore, supercapacitors have the following characteristics:

[0051] Long cycle life: It can be used up to 1 million times;

[0052] Instantaneous high current: Its instantaneous current can reach up to 4600A;

[0053] High safety: It will not spontaneously explode;

[0054] Voltage-free platform: It can be charged even under low current conditions.

[0055] Therefore, supercapacitors are often used as energy storage tanks, and their applications are becoming increasingly widespread.

[0056] Furthermore, it can be seen that supercapacitors can also be used in photovoltaic power generation systems as energy storage pools. However, how to combine supercapacitors with photovoltaic power generation systems to achieve the collection of weak light and photoelectric conversion is a technical problem that urgently needs to be solved.

[0057] In view of the above technical problems, the basic idea of the present application is to provide an all-weather photovoltaic power supply system and a power supply method. The present application adds a weak light collection assembly between the photovoltaic assembly and the control assembly. The weak light collection assembly utilizes the long cycle life, no voltage platform, and instantaneous large current characteristics of the super capacitor to realize the collection and conversion of light into electric energy in weak light environments such as night, cloudy days, rainy days, and the like, to output electric energy for the control assembly, thereby improving the utilization rate of light sources and greatly improving the photoelectric conversion rate. In addition, the present application also provides a detection device for detecting the output power of the photovoltaic assembly and the super capacitor, to realize the control of the power supply path of the photovoltaic assembly and effectively control the charging and discharging of the super capacitor.

[0058] Exemplary system

[0059] Referring to FIG. 1, FIG. 1 is a schematic diagram of an all-weather photovoltaic power supply system according to some embodiments of the present application. The exemplary system includes a photovoltaic assembly, a weak light collection assembly, and a control assembly. The photovoltaic assembly is used to realize photoelectric conversion by means of direct light. The weak light collection assembly is used to collect and store weak light electric energy output by the photovoltaic assembly. The control assembly is used to control the electric energy output by the weak light collection assembly.

[0060] In one implementation of the embodiments of the present application, the weak light collection assembly includes a super capacitor module and a detection device. The super capacitor module includes a plurality of super capacitors. The detection device is used to detect the output power of the super capacitor module to control the charging and discharging of the super capacitor module.

[0061] Referring to FIG. 2, FIG. 2 is another schematic diagram of an all-weather photovoltaic power supply system according to some embodiments of the present application.

[0062] In one implementation of the embodiments of the present application, the weak light collection assembly includes a super capacitor module, a detection device, and a stabilizing device. The super capacitor module includes a plurality of super capacitors. The detection device is used to detect the output power of the super capacitor module to control the charging and discharging of the super capacitor module. The stabilizing device is used to improve and stabilize the output power of the super capacitor module.

[0063] In one implementation of the embodiments of the present application, each super capacitor is connected in series with each other, so that the output power of the super capacitor module is within the optimal input power range of the control assembly.

[0064] In one implementation of the embodiments of the present application, each super capacitor is connected in parallel with each other, so that the output power of the super capacitor module is within the optimal input power range of the control assembly.

[0065] In one implementation of the embodiment of the present application, some of the super capacitors are connected in series and some are connected in parallel, so that the output power of the super capacitor module is within the optimal input power range of the control component.

[0066] In one implementation of the embodiment of the present application, when the detection device detects that the output power of the super capacitor module rises and rises to the upper limit of the optimal input power range of the control component, the super capacitor module starts discharging. When the detection device detects that the output power of the super capacitor module decreases and is within the optimal input power range of the control component, the super capacitor module continues to discharge. When the detection device detects that the output power of the super capacitor module decreases and decreases to the lower limit of the optimal input power range of the control component, the super capacitor module stops discharging and charges again.

[0067] In one implementation of the embodiment of the present application, the initial charging voltage of the super capacitor module is 0V.

[0068] In one implementation of the embodiment of the present application, the control component is an inverter.

[0069] Exemplary method

[0070] Referring to FIG. 3, FIG. 3 is a schematic diagram of a power supply process of an all-weather photovoltaic power supply system according to some embodiments of the present application. The exemplary method comprises

[0071] Step S1, obtaining the real-time output power of the super capacitor module;

[0072] Step S2, judging the real-time state of the output power of the super capacitor module;

[0073] Step S3, controlling the charging and discharging of the super capacitor module according to the real-time state of the output power of the super capacitor module, so as to realize whether to supply power to the control component.

[0074] The present application obtains the real-time output power of the super capacitor module, judges the real-time state of the output power of the super capacitor module, and then controls the charging and discharging of the super capacitor module, so as to realize whether to supply power to the control component. The present application uses the characteristics of super capacitors, uses the super capacitor module as an electric energy storage pool, realizes that the light source can be collected and converted into electric energy in weak light environment such as night, cloudy day, rainy day, etc., and outputs electric energy for the control component, which not only improves the utilization rate of the light source, but also greatly improves the photoelectric conversion rate. In addition, the present application also sets a detection device for detecting the output power of the photovoltaic component and the super capacitor, so as to realize the control of the power supply path of the photovoltaic component, and can also effectively control the charging and discharging of the super capacitor.

[0075] In one implementation of the embodiment of the present application, in step S2, the real-time state of the output power of the super capacitor module is determined, specifically

[0076] The real-time output power of the super capacitor module is determined whether it is within the optimal input power range of the control component and the change trend of the real-time output power of the super capacitor module, so as to obtain the real-time state of the output power of the super capacitor module.

[0077] The present application monitors the real-time output power of the super capacitor module and its change trend in real time, and compares it with the optimal input power of the control component, so as to obtain the real-time state of the output power of the super capacitor module, which can realize precise control for the control component.

[0078] In one implementation of the embodiment of the present application, the real-time state of the output power of the super capacitor module includes a first state, a second state and a third state,

[0079] When the detection device detects that the output power of the super capacitor module rises and rises to the upper limit value of the optimal input power range of the control component, the output power of the super capacitor module is in the first state;

[0080] When the detection device detects that the output power of the super capacitor module decreases and is within the optimal input power range of the control component, the output power of the super capacitor module is in the second state;

[0081] When the detection device detects that the output power of the super capacitor module decreases and decreases to the lower limit value of the optimal input power range of the control component, the output power of the super capacitor module is in the third state.

[0082] It should be noted that in one implementation of the embodiment of the present application, the present application detects the output voltage of the super capacitor module through the detection device, and then obtains the output power of the super capacitor module.

[0083] It should be noted that in one implementation of the embodiment of the present application, the present application detects the output current of the super capacitor module through the detection device, and then obtains the output power of the super capacitor module.

[0084] It should be noted that in one implementation of the embodiment of the present application, the present application detects the output voltage and output current of the super capacitor module through the detection device, and then obtains the output power of the super capacitor module.

[0085] The application monitors the real-time output voltage and real-time output current of the super capacitor module through the detection device, and then obtains the real-time output power and its change trend of the super capacitor module, and compares them with the optimal input power of the control assembly, so as to obtain three real-time states of the output power of the super capacitor module, thereby accurately controlling power supply.

[0086] In one implementation manner of the embodiment of the application, in step S3, the charging and discharging of the super capacitor module are controlled according to the real-time state of the output power of the super capacitor module, specifically

[0087] If the output power of the super capacitor module is in the first state, the super capacitor module is controlled to start discharging and start supplying power to the control assembly;

[0088] If the output power of the super capacitor module is in the second state, the super capacitor module is controlled to continuously discharge and continuously supply power to the control assembly;

[0089] If the output power of the super capacitor module is in the third state, the super capacitor module is controlled to stop discharging and recharging, and stop supplying power to the control assembly.

[0090] The application controls the discharging and charging of the super capacitor module according to the three states of the output power of the super capacitor module, and then accurately controls the power supply to the control assembly.

[0091] It should be understood that the disclosed embodiments of the application are not limited to the specific processing steps or materials disclosed herein, but extend to equivalent alternatives of such features as understood by those skilled in the relevant art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0092] The term "embodiment" mentioned in the specification means that the specific features or characteristics described in connection with the embodiment are included in at least one embodiment of the application. Therefore, the phrase "embodiment" or "embodiments" appearing throughout the specification does not necessarily mean the same embodiment.

[0093] In addition, the described features or characteristics can be combined into one or more embodiments in any other suitable manner. In the above description, some specific details, such as thickness, number, etc., are provided to provide a comprehensive understanding of the embodiments of the application. However, those skilled in the relevant art will understand that the application can be implemented without the above one or more specific details or can be implemented using other methods, components, materials, etc.

Claims

1. An all-weather photovoltaic powered system, characterized in that, Comprising a photovoltaic assembly for photoelectric conversion by means of direct light; a weak light collecting assembly for collecting and storing weak light electric energy output by the photovoltaic assembly, a control assembly for controlling electric energy output by the weak light collecting assembly.

2. The all-weather photovoltaic powered system of claim 1, wherein, The weak light collecting assembly comprises a super capacitor module and a detection device, the super capacitor module comprises a plurality of super capacitors, and the detection device is used for detecting output power of the super capacitor module to control charging and discharging of the super capacitor module.

3. The all-weather photovoltaic powered system of claim 2, wherein, When the detection device detects that the output power of the super capacitor module rises and rises to an upper limit value of the optimal input power range of the control assembly, the super capacitor module starts discharging.

4. The all-weather photovoltaic powered system of claim 2, wherein, When the detection device detects that the output power of the super capacitor module falls and is within the optimal input power range of the control assembly, the super capacitor module continues discharging.

5. The all-weather photovoltaic powered system of claim 2, wherein, When the detection device detects that the output power of the super capacitor module falls and falls to a lower limit value of the optimal input power range of the control assembly, the super capacitor module stops discharging and charges again.

6. The all-weather photovoltaic powered system of claim 2, wherein, The initial charging voltage of the super capacitor module is 0V.

7. The all-weather photovoltaic powered system of claim 2, wherein, The weak light collecting assembly further comprises a stabilizing device used for improving and stabilizing the output power of the super capacitor module.

8. The all-weather photovoltaic powered system of claim 2, wherein, The super capacitor module comprises a plurality of super capacitors, and each of the super capacitors is connected in series or / and in parallel with each other.

9. The all-weather photovoltaic powered system of claim 1, wherein, The control assembly is an inverter.

10. A method of providing photovoltaic power throughout the day, characterized by, The method is performed by using the system of any one of claims 2-9, and the method comprises acquiring real-time output power of the super capacitor module; judging a real-time state of the output power of the super capacitor module; controlling charging and discharging of the super capacitor module according to the real-time state of the output power of the super capacitor module.

11. The all-weather photovoltaic power supply method according to claim 10, characterized in that, The judgment of the real-time state of the output power of the super capacitor module specifically comprises judging whether the real-time output power of the super capacitor module is within the optimal input power range of the control assembly and a change trend of the real-time output power of the super capacitor module, so as to obtain the real-time state of the output power of the super capacitor module.

12. The all-weather photovoltaic power supply method according to claim 11, characterized in that, The real-time state of the output power of the super capacitor module comprises a first state, a second state and a third state, when the detection device detects that the output power of the super capacitor module rises and rises to an upper limit value of the optimal input power range of the control assembly, the output power of the super capacitor module is in the first state; when the detection device detects that the output power of the super capacitor module falls and is within the optimal input power range of the control assembly, the output power of the super capacitor module is in the second state; when the detection device detects that the output power of the super capacitor module falls and falls to a lower limit value of the optimal input power range of the control assembly, the output power of the super capacitor module is in the third state.

13. The all-weather photovoltaic power supply method according to claim 12, characterized in that, The control of charging and discharging of the super capacitor module according to the real-time state of the output power of the super capacitor module specifically comprises if the output power of the super capacitor module is in the first state, controlling the super capacitor module to start discharging and start supplying power to the control assembly; if the output power of the super capacitor module is in the second state, controlling the super capacitor module to continuously discharge and continuously supply power to the control assembly; if the output power of the super capacitor module is in the third state, controlling the super capacitor module to stop discharging and charging again, and stop supplying power to the control assembly.

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