TWI406473B - Controlling apparatus for photovoltaic power providing structure and method thereof - Google Patents

Abstract

A controlling apparatus for photovoltaic power providing structure is disclosed, wherein the controlling apparatus is adapted to connect to a load. The controlling apparatus comprises a detecting module, a power storage module, a voltage converter module and a control module. The detecting module is configured to detect the operation status of the photovoltaic power providing structure. The power storage module is capable of storing the energy provided by the photovoltaic power providing structure. The voltage converter module is configured to convert the output voltage of the power storage module. The control module is configured to provide power to the load either from the photovoltaic power providing structure or the power storage module based on a detection result provided by the detecting module.

Description

Control device and method applied to photovoltaic power supply architecture

The present invention relates to a photovoltaic power supply device and method, and more particularly to a control device and method for application to a photovoltaic power converter.

With the rise of environmental awareness and people's urgent need for energy use, a kind of power generation method known as pollution-free is in the ascendant, that is, solar power generation. In general, solar power generation uses solar panels as a means of collecting light energy, and converts light energy into electrical energy through a photovoltaic effect as a source of power. However, just like most power generation methods, energy conversion efficiency is also the focus of solar power generation.

Figure 1 shows a conventional solar panel connection that forms a solar powered architecture for providing power. As shown in FIG. 1, the solar powering architecture 100 includes a solar panel 110 to supply power to a load 120. Although the solar power supply architecture 100 has the advantages of low cost and simple wiring, it can only exert its conversion efficiency when it is at medium brightness. In other words, at low brightness, the voltage generated by the solar panel 110 will be too low to supply power to the load 120; while at high brightness, the solar panel 110 can only provide current at medium brightness. Accordingly, the solar power supply architecture 100 does not meet the current demand for solar power generation.

Figure 2 shows another conventional solar panel connection that constitutes a solar powered architecture for providing power. As shown in FIG. 2, the solar power supply architecture 200 includes a plurality of solar panels 210 connected in series to supply power to a load 220. The solar powering architecture 200 addresses some of the shortcomings of the solar powering architecture 100 shown in FIG. In other words, at low brightness, although the voltage generated by the individual solar panels 210 is too low to supply power to the load 220, the sum of the voltages in series can still be supplied to the load 220. Therefore, the solar power supply architecture 200 has the advantage of being able to operate at low brightness. However, at high brightness, the solar powered architecture 200 still only provides current at medium brightness.

Figure 3 shows another conventional solar panel connection that forms a solar powered architecture for providing power. As shown in FIG. 3, the solar power supply architecture 300 includes a plurality of solar panels 310 connected in parallel to supply power to a load 320. The solar power architecture 300 solves another of the disadvantages of the solar power architecture 100 shown in FIG. In other words, at medium to high brightness, the parallel solar power supply architecture 300 can provide more current than the solar power supply architecture 100 and the solar power supply architecture 200 can provide. However, at low brightness, the solar powering architecture 300 will still be unable to supply power to the load 320 due to the resulting voltage being too low.

Figure 4 shows another conventional solar panel connection that constitutes a solar powered architecture for providing power. As shown in FIG. 4, the solar power supply architecture 400 includes a plurality of solar panels 410 connected in series and in parallel to supply power to a load 420. The solar power supply architecture 400 combines the advantages of the solar power supply architecture 200 and the solar power supply architecture 300, that is, it can still supply power to the load 420 at low brightness; and at medium and high brightness, the solar power supply architecture 400 can also provide It is higher than the current that the solar power supply architecture 100 and the solar power supply architecture 200 can provide. However, since the connection manner of the solar panels 410 is fixed and cannot be changed, it must be matched with different use requirements and needs to be configured in advance, and thus cannot be adjusted. In addition, in order to achieve the advantages of the solar power supply architecture 200 and the solar power supply architecture 300 at the same time, the solar power supply architecture 400 also requires more solar panels to increase the cost.

Accordingly, what is needed in the industry is a control device and method for a photovoltaic power supply architecture, which can dynamically change the output control of the photovoltaic power supply architecture according to the needs of use and various environments, thereby achieving the purpose of improving the use efficiency.

The present invention provides a control device for an optoelectronic power supply architecture, wherein the control device is connectable to a load. The control device includes a detection module, an energy storage unit, a voltage conversion module, and a control module. The detection module is configured to detect the working state of the optoelectronic power supply architecture. The energy storage unit can store the electrical energy provided by the optoelectronic power supply architecture. The voltage conversion module is configured to convert an output voltage of the energy storage unit. The control module is configured to control the voltage conversion module and the optoelectronic power supply architecture to supply power to the load according to the detection result of the detection module.

The present invention provides another control method for an optoelectronic power supply architecture, comprising the steps of: storing the electrical energy provided by the optoelectronic power supply architecture to an energy storage unit; detecting the working state of the optoelectronic power supply architecture; The state is in a first state, the power is supplied to the load by the optoelectronic power supply architecture; and if the working state of the optoelectronic power supply architecture is in a second state, the output voltage of the energy storage unit is converted to conform to the load Charging voltage to provide electrical energy stored by the energy storage unit to the load.

The technical features of the present invention have been briefly described above, and the detailed description below will be better understood. Other technical features constituting the subject matter of the patent application of the present invention will be described below. It is to be understood by those of ordinary skill in the art that the present invention may be practiced otherwise. It is to be understood by those of ordinary skill in the art that this invention is not limited to the scope of the invention.

The invention discussed herein is directed to a control device and method for use in an optoelectronic power supply architecture. In order to thoroughly understand the present invention, detailed steps and compositions will be set forth in the following description. Obviously, the implementation of the present invention is not limited to the specific details familiar to those skilled in the art. On the other hand, well-known components or steps are not described in detail to avoid unnecessarily limiting the invention. The preferred embodiments of the present invention are described in detail below, but the present invention may be widely practiced in other embodiments, and the scope of the present invention is not limited by the scope of the following patents. .

FIG. 5 shows a schematic diagram of a control device applied to an optoelectronic power supply architecture in accordance with an embodiment of the present invention. As shown in FIG. 5, the control device 520 is respectively connected to one of the photoelectric power supply architecture 512 and a load 530 formed by a plurality of photoelectric conversion boards 510. In some embodiments of the present invention, the photoelectric conversion panels 510 may be solar panels, and the load 530 may be a battery or other various electronic products. The control device 520 includes a detection module 522, an energy storage unit 524, a voltage conversion module 526, and a control module 528. The detection module 522 is configured to detect the working state of the photoelectric conversion board 510. The energy storage unit 524 can store the power provided by the photoelectric power supply structure 512, and the voltage conversion module 526 is configured to convert the storage. The control module 528 is configured to control the voltage conversion module 526 and the optoelectronic power supply architecture 512 to provide power to the load 530 according to the detection result of the detection module 522. In some embodiments of the present invention, the energy storage unit 524 can be a capacitor or a battery.

6 shows a flow chart of a control method applied to an optoelectronic power supply architecture according to an embodiment of the present invention, wherein the optoelectronic power supply architecture is composed of a plurality of photoelectric conversion panels to supply power to a load. In some embodiments of the invention, the photoelectric conversion panels are solar panels. The start and end of the control method are controlled externally, for example, the switch can be manually switched to trigger the start and end of the method. At step 602, the power provided by the optoelectronic power supply architecture is continuously stored to an energy storage unit, and the process proceeds to step 604. In step 604, the working state of the optoelectronic power supply architecture is detected, and the process proceeds to step 606. At step 606, a manner of supplying power to the load is determined according to the operating state of the optoelectronic power supply architecture. If the operating state of the optoelectronic power supply architecture is in a first state, then step 608 is entered. In contrast, if the working state of the optoelectronic power supply architecture is in a second state, then step 610 is entered. At step 608, the power is directly supplied to the load using the optoelectronic power supply architecture and proceeds to step 612. At step 610, the output voltage of the energy storage unit is converted to conform to the charging voltage of the load to provide the energy stored by the energy storage unit to the load, and the process proceeds to step 612. At step 612, after triggering via a clock signal, returning to step 604. In some embodiments of the present invention, the energy storage unit can be a capacitor or a battery. It should be noted that, in step 606, if the operating state of the optoelectronic power supply architecture remains unchanged, the same steps as in the previous clock cycle are performed, that is, the same power supply mode is maintained.

As shown in FIG. 6, the control method applied to the optoelectronic power supply architecture can detect the working state of the optoelectronic power supply architecture, for example, the brightness received by the optoelectronic power supply architecture or the output state of the optoelectronic power supply architecture, and the optoelectronic power supply is changed accordingly. The way the architecture is powered to the load is to make it more efficient.

In an embodiment of the invention, the first state represents that the brightness received by the photoelectric conversion plates is within a brightness range, and the second state represents that the brightness received by the photoelectric conversion plates is not between a brightness Within the scope. In another embodiment of the invention, the first state represents that the output voltage of the optoelectronic power supply architecture is within a voltage range, and the second state represents that the output voltage of the optoelectronic power supply architecture is not within a voltage range. In some embodiments of the present invention, the brightness range is such that the optoelectronic power supply architecture can directly supply power to the brightness range of the load, and the voltage range allows the optoelectronic power supply architecture to directly supply power to the voltage range of the load.

7 shows a flow chart of a control method applied to an optoelectronic power supply architecture according to another embodiment of the present invention, wherein the optoelectronic power supply architecture is composed of a plurality of photoelectric conversion panels to supply power to a load. The start and end of the control method are controlled externally, for example, the switch can be manually switched to trigger the start and end of the method. At step 702, the power provided by the optoelectronic power supply architecture is continuously stored to an energy storage unit, and the process proceeds to step 704. At step 704, the output voltage of the optoelectronic power supply architecture is detected and proceeds to step 706. At step 706, a manner of supplying power to the load is determined based on an output voltage of the optoelectronic power supply architecture. If the output voltage of the optoelectronic power supply architecture is within a voltage range, then step 708 is entered. Conversely, if the output voltage of the optoelectronic power supply architecture is not within a voltage range, then step 710 is entered. At step 708, the power is directly supplied to the load using the optoelectronic power supply architecture and proceeds to step 724. At step 710, it is determined that the output voltage of the optoelectronic power supply architecture is lower or higher than the voltage range. If the output voltage of the optoelectronic power supply architecture is lower than the voltage range, then step 712 is entered. If the output voltage of the optoelectronic power supply architecture is higher than the voltage range, then step 714 is entered. At step 712, it is determined whether the output voltage of the optoelectronic power supply architecture is stable. If the output voltage of the optoelectronic power supply architecture is stable, then go to step 716, otherwise go to step 724. At step 714, it is determined whether the output voltage of the optoelectronic power supply architecture is stable. If the output voltage of the optoelectronic power supply architecture is stable, then go to step 718, otherwise go to step 724. At step 716, the output voltage of the energy storage unit is increased to conform to the charging voltage of the load to provide the stored energy of the energy storage unit to the load, and the process proceeds to step 720. In contrast, in step 718, the output voltage of the energy storage unit is lowered to conform to the charging voltage of the load to provide the energy stored by the energy storage unit to the load, and the process proceeds to step 722. At step 720, after the power of the energy storage unit has been supplied to the load, the output voltage of the energy storage unit is restored, and the process proceeds to step 724. In step 722, after the power of the energy storage unit has been supplied to the load, the output voltage of the energy storage unit is restored, and the process proceeds to step 724. After the step is triggered by a clock signal, the process returns to step 704. It should be noted that, in step 706, if the photo-electric output voltage remains unchanged, the same steps as in the previous clock cycle are entered, that is, the same power supply mode is maintained.

Referring to Figure 5, a flow chart of one embodiment of a control device for applying a control method of the present invention to an optoelectronic power supply architecture is described below. At step 702, the electrical energy provided by the optoelectronic power supply architecture 512 is stored to the energy storage unit 524. At step 704, the output voltage of the optoelectronic power supply architecture 512 is detected. If the brightness of the optoelectronic conversion board 510 is sufficient, that is, the output voltage of the optoelectronic power supply architecture 512 can be supplied to the load, then step 708 is performed, and the power supply architecture 512 is used to directly supply power to the load. If the brightness received by the photoelectric conversion board 510 is insufficient, that is, the output voltage of the photovoltaic power supply architecture 512 cannot be supplied to the load. At this time, when the voltage of the energy storage unit 524 rises to the output voltage of the optoelectronic power supply architecture 512, that is, the output voltage of the optoelectronic power supply architecture 512 is stable, the process proceeds to step 716, and the energy storage module 526 is used to improve the energy storage. The output voltage of unit 524 is such that it meets the charging voltage of the load 530 to provide the stored energy of the energy storage unit 524 to the load 530. Accordingly, the control apparatus and method applied to the optoelectronic power supply architecture according to embodiments of the present invention can still provide the converted electrical energy to the load when the brightness is insufficient.

If the brightness received by the photoelectric conversion panel 510 is too sufficient, the photovoltaic power supply architecture 512 can provide a voltage higher than the load demand. At this time, when the voltage of the energy storage unit 524 rises to the output voltage of the optoelectronic power supply architecture 512, that is, the output voltage of the optoelectronic power supply architecture 512 is stable, the process proceeds to step 718, and the energy storage module 526 is used to reduce the energy storage. The output voltage of unit 524 is such that it meets the charging voltage of the load 530 to provide the stored energy of the energy storage unit 524 to the load 530. After reducing the output voltage of the energy storage unit 524, the energy storage unit 524 can provide more current than the photovoltaic power supply architecture 512, so that the load 530 can provide more power. Accordingly, the control apparatus and method for an optoelectronic power supply architecture in accordance with embodiments of the present invention can provide more power to the load when the optoelectronic power supply architecture is at a higher voltage than the load demand.

Figure 8 shows a simulated comparison of the efficiency of the control apparatus and method applied to the optoelectronic power supply architecture and the prior art in accordance with an embodiment of the present invention. As shown in FIG. 8, the photoelectric conversion panel connected in series by the prior art can operate at low brightness, but can only provide a lower current at medium and high brightness. The photoelectric conversion plates connected in parallel by the prior art can provide a high current at medium and high brightness, but cannot operate at low brightness. The range of operation of the conventional series-parallel connection and the available current are between the former two. In contrast, the control apparatus and method according to embodiments of the present invention can provide a small amount of electrical energy to the load when the brightness is insufficient, and provide more power to the load when the brightness is sufficient when the brightness is excessively sufficient. On the other hand, according to the energy formula P=I ² /R, if the load is fixed, the larger the area under the current curve, the larger the energy can be supplied in the same time. As can be seen from FIG. 8, the control apparatus and method according to the embodiment of the present invention have a larger area under the current curve than the conventional technique. Accordingly, the control apparatus and method according to embodiments of the present invention have higher output power than conventional techniques.

In summary, the control device and method applied to the optoelectronic power supply architecture according to the embodiment of the present invention can dynamically change the output control of the optoelectronic power supply architecture according to the use requirements and environment changes, so that the optoelectronic power supply architecture is in various working states. The corresponding power can be provided below. Accordingly, the control apparatus and method applied to the optoelectronic power supply architecture according to embodiments of the present invention can have higher output power than conventional techniques.

The technical and technical features of the present invention have been disclosed as above, and those skilled in the art can still make various substitutions and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the present invention should be construed as being limited by the scope of the appended claims

100. . . Solar power supply architecture

110. . . Solar panels

120. . . load

200. . . Solar power supply architecture

210. . . Solar panels

220. . . load

300. . . Solar power supply architecture

310. . . Solar panels

320. . . load

400. . . Solar power supply architecture

410. . . Solar panels

420. . . load

510. . . Photoelectric conversion board

512. . . Photoelectric power supply architecture

520. . . Control device

522. . . Detection module

524. . . Energy storage unit

526. . . Voltage conversion module

528. . . Control module

530. . . load

602~614. . . step

702~724. . . step

Figure 1 shows a conventional solar panel connection method;

Figure 2 shows another conventional solar panel connection method;

Figure 3 shows another conventional solar panel connection method;

Figure 4 shows another conventional solar panel connection method;

FIG. 5 is a schematic diagram showing a control device applied to an optoelectronic power supply architecture according to an embodiment of the present invention; FIG.

6 shows a flow chart of a control method applied to an optoelectronic power supply architecture according to an embodiment of the present invention;

7 shows a flow chart of a control method applied to a photovoltaic power supply architecture according to another embodiment of the present invention;

Figure 8 shows a simulated comparison of the efficiency of the control apparatus and method applied to the optoelectronic power supply architecture and the prior art in accordance with an embodiment of the present invention.

510. . . Photoelectric conversion board

512. . . Photoelectric power supply architecture

520. . . Control device

522. . . Detection module

524. . . Energy storage unit

526. . . Voltage conversion module

528. . . Control module

530. . . load

Claims (21)

A control device for an optoelectronic power supply architecture can be connected to a load, the control device comprising: a detection module configured to detect an operating state of the optoelectronic power supply architecture; and an energy storage unit for storing the optoelectronic power supply architecture a voltage conversion module configured to convert an output voltage of the energy storage unit; a control module configured to control the voltage conversion module and the photovoltaic power supply architecture according to the detection result of the detection module Supplying power to the load; wherein the operating state of the optoelectronic power supply architecture is an output voltage of the optoelectronic power supply architecture; and wherein the detection module detects that the output voltage of the optoelectronic power supply architecture is lower than a voltage range, and the optoelectronic The output voltage of the power supply architecture is stable, and the voltage conversion module increases the output voltage of the energy storage unit to meet the charging voltage of the load to provide the energy stored by the energy storage unit to the load. The control device of claim 1, wherein the operating state of the optoelectronic power supply architecture is the brightness received by the optoelectronic power supply architecture. According to the control device of claim 2, if the detection module detects that the brightness received by the optoelectronic power supply architecture is within a range of brightness, the control module directly supplies the optoelectronic power supply structure to the power supply. The load. The control device of claim 3, wherein the brightness range is such that the optoelectronic power supply architecture can directly supply power to a range of brightness of the load. The control device of claim 2, wherein the detecting module detects that the brightness received by the photoelectric conversion board is not within a brightness range, The voltage conversion module converts the output voltage of the energy storage unit to meet the charging voltage of the load to provide the energy stored by the energy storage unit to the load. According to the control device of claim 1, wherein the control module detects that the output voltage of the optoelectronic power supply structure is within the voltage range, the control module directly supplies the optoelectronic power supply structure to the load. The control device of claim 6, wherein the voltage range is such that the optoelectronic power supply architecture can directly supply power to a voltage range of the load. According to the control device of claim 1, wherein the detection module detects that the output voltage of the optoelectronic power supply architecture is higher than the voltage range, and the output voltage of the optoelectronic power supply architecture is stable, the voltage conversion mode The group reduces the output voltage of the energy storage unit to conform to the charging voltage of the load to provide the energy stored by the energy storage unit to the load. The control device according to claim 1, wherein the energy storage unit is a capacitor or a battery. The control device according to claim 1, wherein the optoelectronic power supply structure is constituted by at least one photoelectric conversion panel. The control device of claim 10, wherein the at least one photoelectric conversion panel is a solar panel. A control method for an optoelectronic power supply architecture, comprising the steps of: storing the electrical energy provided by the optoelectronic power supply architecture to an energy storage unit; detecting an operating state of the optoelectronic power supply architecture; if the working state of the optoelectronic power supply architecture is in a In a state, the power supply architecture is used to supply power to a load; If the working state of the optoelectronic power supply architecture is in a second state, converting an output voltage of the energy storage unit to meet a charging voltage of the load to provide the energy stored by the energy storage unit to the load; wherein the The second state is that the output voltage of the optoelectronic power supply architecture is not within a voltage range; and wherein if the output voltage of the optoelectronic power supply architecture is lower than the voltage range, and the output voltage of the optoelectronic power supply architecture is stable, the storage is increased. The output voltage of the energy unit is such that it meets the charging voltage of the load to provide the energy stored by the energy storage unit to the load. The control method of claim 12, wherein the first state is that the brightness received by the optoelectronic power supply architecture is within a range of brightness. The control method of claim 13, wherein the brightness range is such that the optoelectronic power supply architecture can directly supply power to a range of brightness of the load. The control method of claim 16, wherein the second state is that the brightness received by the optoelectronic power supply architecture is not within a range of brightness. The control method of claim 12, wherein the first state is that an output voltage of the optoelectronic power supply architecture is within the voltage range. The control method of claim 16, wherein the voltage range is such that the optoelectronic power supply architecture can directly supply power to a voltage range of the load. The control method of claim 12, wherein if the output voltage of the optoelectronic power supply architecture is higher than the voltage range, and the output voltage of the optoelectronic power supply architecture is stable, reducing the output voltage of the energy storage unit to conform to The charging voltage of the load is to supply the energy stored by the energy storage unit to the load. The control method of claim 12, wherein the energy storage unit is a capacitor or a battery. The control method of claim 12, wherein the optoelectronic power supply architecture is comprised of at least one photoelectric conversion panel. The control method according to claim 20, wherein the at least one photoelectric conversion panel is a solar panel.