Wind and light storage circuit

Abstract

The embodiment of the utility model discloses a wind and light storage circuit, which relates to the technical field of integration of a wind and light storage all-in-one machine system and comprises an energy storage module, a voltage conversion module and an access switching module. And the voltage conversion module is connected with the energy storage module and is used for performing voltage conversion on the voltage output by the energy storage module so as to supply power to the load. The access switching module is connected with the energy storage module and the voltage conversion module, and the access switching module is used for providing an access for at least one of the photovoltaic power generation module, the mains supply and the wind power generation module to charge the energy storage module and performing voltage conversion; the access switching module is used for providing an access for at least one of the photovoltaic power generation module, the commercial power, the wind power generation module and the energy storage module to supply power to the load through the voltage conversion module and performing voltage conversion. The universality of the power electronic device based on the wind and light storage circuit can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the integration of wind and light storage machine system technical field, especially, a kind of wind and light storage circuit. BACKGROUND

[0002] Face the policy requirement of double carbon, the emission limit of pollutant and carbon dioxide is increasingly strict. In the coastal port city, large ships have begun to gradually prohibit the use of diesel engine group in offshore, and more use pure electric pilot and new energy power supply. But still there are quite a few small ships use diesel generator as the main power source when sailing. In ordinary household scene, many users still use diesel generator as emergency backup power, there are many problems such as slow start, long power recovery time, loud noise.

[0003] For the above problems, the prior art adopts integrated wind and light storage micro-grid device. The device saves land occupation, improves the installation efficiency of the device, does not need additional civil construction, is safe and convenient to transport, is simple and convenient to use, reduces the high cost of early construction and later maintenance. However, the device uses traditional alternating current bus as the energy transmission path between load and power supply equipment, which has the problems of multiple conversion levels, low system efficiency and complex parallel logic timing. And the maintenance and replacement of the equipment are difficult, the expansibility is poor, the multi-unit network is difficult, and the capacity expansion in the future is difficult. And, the fan unloading device needs to be used, which produces additional heat loss and reduces the service life of the device. And additional backup power supply is needed to provide system backup support, and the component load is not universal. That is, the wind and light storage device provided in the prior art has low universality. UTILITY MODEL CONTENTS

[0004] The utility model provides a kind of wind and light storage circuit to improve the universality of power electronic device based on the wind and light storage circuit.

[0005] The utility model provides a kind of wind and light storage circuit, comprising:

[0006] energy storage module;

[0007] voltage conversion module, connect the energy storage module, the voltage conversion module is used to voltage conversion for the voltage output by the energy storage module, to power supply for load;

[0008] path switching module, connect the energy storage module and the voltage conversion module, the path switching module is used to provide path and voltage conversion for at least one of photovoltaic power generation module, commercial power and wind power generation module to charge the energy storage module, and the path switching module is used to provide path and voltage conversion for at least one of the photovoltaic power generation module, the commercial power, the wind power generation module and the energy storage module to power supply for the load through the voltage conversion module.

[0009] Optionally, the path switching module comprises a first voltage conversion unit, a second voltage conversion unit and a third voltage conversion unit;

[0010] The input end of the first voltage conversion unit is connected with the photovoltaic power generation module or the commercial power, the input end of the second voltage conversion unit is connected with the wind power generation module or the commercial power, the output end of the first voltage conversion unit and the output end of the second voltage conversion unit are connected with the first input-output end of the third voltage conversion unit, the second input-output end of the third voltage conversion unit is connected with the energy storage module, and the output end of the first voltage conversion unit and the output end of the second voltage conversion unit are also connected with the voltage conversion module.

[0011] Optionally, the first voltage conversion unit and the second voltage conversion unit each comprise a first switch subunit, a second switch subunit and a first voltage conversion subunit;

[0012] The input end of the first voltage conversion subunit in the first voltage conversion unit is connected with the photovoltaic power generation module through the first switch subunit therein and connected with the commercial power through the second switch subunit therein, the input end of the first voltage conversion subunit in the second voltage conversion unit is connected with the wind power generation module through the first switch subunit therein and connected with the commercial power through the second switch subunit therein, and the output end of the first voltage conversion subunit is connected with the first input-output end of the third voltage conversion unit and connected with the input end of the voltage conversion module.

[0013] Optionally, the voltage conversion subunit comprises a first inductor, a second inductor, a first transistor, a second transistor, a first capacitor, a second capacitor, a third capacitor, a first diode and a second diode;

[0014] The first end of the first inductor is connected to the first end of the photovoltaic power generation module or the first end of the wind power generation module through the first switch subunit, and is connected to the first power supply end of the commercial power through the second switch subunit, the second end of the first inductor is connected to the first electrode of the first transistor, the first electrode of the first transistor is connected to the anode of the first diode, the cathode of the first diode is connected to the first end of the first capacitor, and the first end of the first capacitor serves as the first output end of the first voltage conversion unit and the first output end of the second voltage conversion unit; the first end of the second inductor is connected to the second end of the photovoltaic power generation module, the second end of the wind power generation module or the second power supply end of the commercial power, the second end of the second inductor is connected to the second electrode of the second transistor, the first electrode of the second transistor is connected to the second electrode of the first transistor, the second electrode of the second transistor is connected to the cathode of the second diode, the anode of the second diode is connected to the first end of the second capacitor, the second end of the second capacitor is connected to the second end of the first capacitor, and the first end of the second capacitor serves as the second output end of the first voltage conversion unit and the second output end of the second voltage conversion unit; the first end of the third capacitor is connected to the first end of the first inductor, and the second end of the third capacitor is connected to the first end of the second inductor.

[0015] The common end of the first transistor and the second transistor in the first voltage conversion unit is connected to the first output end of the voltage conversion module, and the common end of the first transistor and the second transistor in the second voltage conversion unit is grounded.

[0016] Optionally, the third voltage conversion unit comprises a second voltage conversion subunit.

[0017] The third input / output end of the second voltage conversion subunit is connected to the output end of the first voltage conversion unit and the output end of the second voltage conversion unit, and the fourth input / output end of the second voltage conversion subunit is connected to the energy storage module.

[0018] Optionally, the second voltage conversion subunit comprises a third inductor, a fourth inductor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a fourth capacitor, a fifth capacitor and a sixth capacitor.

[0019] The first end of the third inductor is connected to the first electrode of the third transistor, the first electrode of the third transistor is connected to the second electrode of the fourth transistor, the first electrode of the fourth transistor is connected to the first end of the fourth capacitor, and the first end of the fourth capacitor is connected to the first output end of the first voltage conversion unit and the first output end of the second voltage conversion unit.

[0020] The first end of the fourth inductor is connected to the second electrode of the fifth transistor, the first electrode of the fifth transistor is connected to the second electrode of the third transistor, the first electrode of the fifth transistor is grounded, the second electrode of the fifth transistor is connected to the first electrode of the sixth transistor, the second electrode of the sixth transistor is connected to the first end of the fifth capacitor, the first end of the fifth capacitor is connected to the second output end of the first voltage conversion unit and the second output end of the second voltage conversion unit; the second end of the fifth capacitor is connected to the second end of the fourth capacitor; the first end of the sixth capacitor is connected to the second end of the third inductor, and the second end of the sixth capacitor is connected to the second end of the fourth inductor.

[0021] Optionally, the voltage conversion module comprises a first switch unit, a second switch unit, a first energy storage unit and a second energy storage unit.

[0022] The first end of the first switch unit is connected to the first output end of the first voltage conversion unit, the second end of the first switch unit is connected to the first end of the second switch unit, the second end of the second switch unit is connected to the second output end of the first voltage conversion unit, the second end of the first switch unit is connected to the first end of the first energy storage unit, the second end of the first energy storage unit is connected to the first end of the second energy storage unit, the first end of the second energy storage unit serves as the second output end of the voltage conversion module, and the second end of the second energy storage unit serves as the first output end of the voltage conversion module.

[0023] Optionally, the first switch unit comprises a seventh transistor, the second switch unit comprises an eighth transistor, the first energy storage unit comprises a fifth inductor, and the second energy storage unit comprises a seventh capacitor.

[0024] The first electrode of the seventh transistor is connected to the first output end of the first voltage conversion unit, the second electrode of the seventh transistor is connected to the first electrode of the eighth transistor, the second electrode of the eighth transistor is connected to the second output end of the first voltage conversion unit, the second electrode of the seventh transistor is connected to the first end of the fifth inductor, the second end of the fifth inductor is connected to the first end of the seventh capacitor, the first end of the seventh capacitor serves as the second output end of the voltage conversion module, and the second end of the seventh capacitor serves as the first output end of the voltage conversion module.

[0025] Optionally, the wind-solar-storage circuit further comprises a control module connected to the energy storage module, the voltage conversion module, the path switching module, the photovoltaic power generation module and the wind power generation module, respectively, and configured to control the path switching module to switch paths and perform voltage conversion, so as to charge the energy storage module by at least one of the photovoltaic power generation module, the mains and the wind power generation module, and to supply power to the load by at least one of the photovoltaic power generation module, the mains, the wind power generation module and the energy storage module through the voltage conversion module.

[0026] Optionally, the path switching module comprises a first port, a second port, a third port and a fourth port, the first port is connected to the photovoltaic power generation module or the mains, the second port is connected to the mains or the wind power generation module, the third port is connected to the energy storage module, and the fourth port is connected to the voltage conversion module.

[0027] The technical scheme of the embodiment of the utility model, through setting energy storage module, voltage conversion module and path switching module, the path switching module is used for providing path and performing voltage conversion for at least one of photovoltaic power generation module, mains and wind power generation module to charge the energy storage module, and the path switching module is used for providing path and performing voltage conversion for at least one of photovoltaic power generation module, mains, wind power generation module and energy storage module to supply power to the load through voltage conversion module. Thus, when the wind-solar-storage circuit application scene is wind-solar-storage working mode, the path switching module accesses photovoltaic power generation module and wind power generation module, and when wind-solar power generation is sufficient, supplies power to the energy storage module and the load through photovoltaic power generation module and wind power generation module, and when wind-solar power generation is insufficient, the energy storage module discharges and supplies power to the load through the voltage conversion module. When the wind-solar-storage circuit application scene is backup power supply working mode, supplies power to the energy storage module and the load through the mains or the mains and photovoltaic power generation module or the mains and wind power generation module. In summary, the utility model provides a circuit integrating mains, wind power, photovoltaic, energy storage and voltage conversion. Compared with the traditional wind-solar-storage equipment, when facing different scenes such as ship use, household use, offshore island and household energy storage, the path switching module can be flexibly controlled to realize selection of functional modules, form photovoltaic-storage, wind-storage, wind-solar-storage and backup power supply unit, facilitate expansion of system capacity in the future, and improve the versatility of power electronic devices based on the wind-solar-storage circuit.

[0028] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the utility model, nor is it used to limit the scope of the utility model. Other features of the utility model will become easy to understand through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0030] Figure 1 A structural schematic diagram of a wind and light storage circuit provided by the embodiment of the present application is shown in the figure.

[0031] Figure 2 A structural schematic diagram of another wind and light storage circuit provided by the embodiment of the present application is shown in the figure.

[0032] Figure 3 A structural schematic diagram of another wind and light storage circuit provided by the embodiment of the present application is shown in the figure.

[0033] Figure 4 A power flow and signal control schematic diagram of a wind and light storage circuit provided by the embodiment of the present application is shown in the figure.

[0034] Figure 5 A structural schematic diagram of another wind and light storage circuit provided by the embodiment of the present application is shown in the figure.

[0035] Figure 6 A power flow and signal control schematic diagram of another wind and light storage circuit provided by the embodiment of the present application is shown in the figure.

[0036] Figure 7 A structural schematic diagram of a first voltage conversion unit provided by the embodiment of the present application is shown in the figure.

[0037] Figure 8 A structural schematic diagram of a second voltage conversion unit provided by the embodiment of the present application is shown in the figure.

[0038] Figure 9 A structural schematic diagram of a third voltage conversion unit provided by the embodiment of the present application is shown in the figure.

[0039] Figure 10 A structural schematic diagram of a voltage conversion module provided by the embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0040] In order to make the person skilled in the art better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the present application.

[0041] It should be noted that the terms "first", "second" and the like in the description and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and their variants are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0042] The embodiment of the present application provides a wind and light energy storage circuit. Figure 1 The structure diagram of the wind and light energy storage circuit provided by the embodiment of the present application is shown in Figure 1 The wind and light energy storage circuit comprises an energy storage module 10, a voltage conversion module 20 and a path switching module 30.

[0043] The voltage conversion module 20 is connected with the energy storage module 10, and the voltage conversion module 20 is used for voltage conversion of the voltage output by the energy storage module 10 to supply power to the load 300. The path switching module 30 is connected with the energy storage module 10 and the voltage conversion module 20, and the path switching module 30 is used for providing a path for charging the energy storage module 10 by at least one of the photovoltaic power generation module 100, the commercial power and the wind power generation module 200 and performing voltage conversion, and the path switching module 30 is used for providing a path for supplying power to the load 300 by at least one of the photovoltaic power generation module 100, the commercial power, the wind power generation module 200 and the energy storage module 10 through the voltage conversion module 20 and performing voltage conversion.

[0044] The voltage conversion module 20 is connected with the energy storage module 10 through the path switching module 30. The photovoltaic power generation module 100 can include a photovoltaic panel, and the wind power generation module 200 can include a wind power generator. The voltage output by the photovoltaic panel, the wind power generator and the energy storage module 10 is a direct current voltage, and the voltage conversion module 20 is used to convert the direct current voltage into an alternating current voltage to supply power to the load 300. The path switching module 30 can be understood as a direct current multi-port converter.

[0045] To facilitate the description of the specific working process of the wind-solar-storage circuit, Figure 1 The path switching module 30 is connected with the photovoltaic power generation module 100 and the wind power generation module 200 respectively, and this is the wind-solar-storage working mode.

[0046] Specifically, when the light and wind are sufficient, that is, when the wind-solar power generation is sufficient, sufficient power support can be provided at this time. The path switching module 30 connects the lines between the photovoltaic power generation module 100 and the wind power generation module 200 and the energy storage module 10 and the voltage conversion module 20, and converts the voltage provided by the photovoltaic power generation module 100 and the wind power generation module 200, and then transmits the converted voltage to the energy storage module 10 and the load 300 to charge the energy storage module 10 and supply power to the load 300. It can be understood that when the path switching module 30 supplies power to the load 300 through the photovoltaic power generation module 100 and the wind power generation module 200, the converted voltage is first transmitted to the voltage conversion module 20, and the voltage conversion module 20 further converts the voltage and transmits it to the load 300 to supply power to the load 300. When the wind-solar power generation is insufficient, the energy storage module 10 can be used to supply power to the load 300. That is, the path switching module 30 connects the lines between the energy storage module 10 and the voltage conversion module 20, the energy storage module 10 discharges, and the voltage conversion module 20 converts the voltage output by the energy storage module 10 to supply power to the load 300.

[0047] Further, when using single power or using power and photovoltaic power generation module 100 or using power and wind power generation module 200 to supply power to the energy storage module 10 and the load 300, the wind-solar-storage circuit can act as an UPS (Uninterruptible Power Supply) to provide power to the load 300. This enriches the application scenarios of the wind-solar-storage circuit, and further enriches the application scenarios of the power electronic device based on the wind-solar-storage circuit, and improves its versatility.

[0048] The technical scheme of the embodiment of the utility model provides a circuit which integrates municipal power, wind power, photovoltaic power, energy storage and voltage conversion, compared with the traditional wind-solar-storage equipment, when facing different scenes such as ship use, household use, off-shore island and household energy storage, the path switching module 30 can be flexibly controlled to realize the selection of functional modules, to form a wind-solar-storage unit, a wind-storage unit, a wind-solar-storage unit and a backup power unit, and the system capacity can be expanded in the future, and the versatility of the power electronic device based on the wind-solar-storage circuit can be improved.

[0049] Figure 2 Another structure schematic view of the wind-solar-storage circuit provided by the embodiment of the utility model is provided, referring to Figure 2 On the basis of the above embodiment, optionally, the path switching module 30 is connected to the municipal power 400 and the wind power module 200 respectively.

[0050] Specifically, when the wind power is sufficient, the wind power module 200 can be preferentially selected to supply power to the energy storage module 10 and the load 300; when the wind power is insufficient, the municipal power 400 and the wind power module 200 can be used together to supply power to the energy storage module 10 and the load 300, or the municipal power 400 can be used alone to supply power to the energy storage module 10 and the load 300. When the wind power is insufficient and power is cut off, the energy storage module 10 and the voltage conversion module 20 can be used to supply power to the load 300.

[0051] It can be understood that in other embodiments, the access switching module 30 can also access the mains 400 and the photovoltaic power generation module 100 respectively. Specifically, when the light is sufficient, the photovoltaic power generation module 100 can be preferentially selected to supply power to the energy storage module 10 and the load 300; when the light is insufficient, the mains 400 and the photovoltaic power generation module 100 can be used together to supply power to the energy storage module 10 and the load 300, or the mains 400 can be used alone to supply power to the energy storage module 10 and the load 300. When the light is insufficient and power is off, the energy storage module 10 and the voltage conversion module 20 can be used to supply power to the load 300.

[0052] Figure 3 Another structure diagram of a wind-solar energy storage circuit provided by the embodiment of the utility model, see Figure 3 On the basis of the above embodiments, optionally, the access switching module 30 comprises a first voltage conversion unit 31, a second voltage conversion unit 32 and a third voltage conversion unit 33.

[0053] The input end of the first voltage conversion unit 31 is connected with the photovoltaic power generation module 100 or the mains, the input end of the second voltage conversion unit 32 is connected with the wind power generation module 200 or the mains, the output end of the first voltage conversion unit 31 and the output end of the second voltage conversion unit 32 are connected with the first input-output end of the third voltage conversion unit 33, the second input-output end of the third voltage conversion unit 33 is connected with the energy storage module 10, and the output end of the first voltage conversion unit 31 and the output end of the second voltage conversion unit 32 are also connected with the voltage conversion module 20.

[0054] Figure 3 The access switching module 30 is connected with the photovoltaic power generation module 100 and the wind power generation module 200.

[0055] The first voltage conversion unit 31 converts the voltage inputted by the input end into stable and accurate direct current voltage to meet the requirements of subsequent circuits (the energy storage module 10 and the voltage conversion module 20). Especially, when the photovoltaic power generation module 100 is connected, the first voltage conversion unit 31 also adjusts the working point of the photovoltaic panel in real time, so that it always outputs maximum power, thereby improving the efficiency of photovoltaic power generation and energy utilization.

[0056] The second voltage conversion unit 32 converts the voltage inputted by the input end into stable and accurate direct current voltage to meet the requirements of subsequent circuits (the energy storage module 10 and the voltage conversion module 20). Especially, when the wind power generation module 200 is connected, the second voltage conversion unit 32 can adjust the load of the wind driven generator by controlling the input current or duty cycle, so that the impeller always runs at the highest speed of capturing wind energy, thereby maximizing the utilization of wind energy and improving the efficiency of wind power generation and energy utilization.

[0057] The third voltage conversion unit 33 further converts the voltage outputted by the first voltage conversion unit 31 and the second voltage conversion unit 32 to match the charging current of the energy storage module 10, further improves the charging efficiency and energy utilization, and converts the voltage outputted by the energy storage module 10 to provide to the voltage conversion module 20 to supply power to the load 300.

[0058] Optionally, the first voltage conversion unit 31, the second voltage conversion unit 32 and the third voltage conversion unit 33 all include a DC / DC (Direct Current to Direct Current) converter.

[0059] Specifically, when the photovoltaic and wind power is sufficient, the first voltage conversion unit 31 converts the direct current voltage provided by the photovoltaic power generation module 100 to form a more stable first direct current voltage, which can be transmitted to the third voltage conversion unit 33 through the first input / output end of the third voltage conversion unit 33, and further converted by the third voltage conversion unit 33, and then supplied to the energy storage module 10 through the second input / output end of the third voltage conversion unit 33. At the same time, the first direct current voltage outputted by the first voltage conversion unit 31 can be converted to alternating current voltage by the voltage conversion module 20 to supply power to the load 300. The second voltage conversion unit 32 converts the direct current voltage provided by the wind power generation module 200 to form a more stable second direct current voltage, which can be transmitted to the third voltage conversion unit 33 through the first input / output end of the third voltage conversion unit 33, and further converted by the third voltage conversion unit 33, and then supplied to the energy storage module 10 through the second input / output end of the third voltage conversion unit 33. At the same time, the second direct current voltage outputted by the second voltage conversion unit 32 can be converted to alternating current voltage by the voltage conversion module 20 to supply power to the load 300. When the photovoltaic and wind power is not sufficient, the energy storage module 10 discharges, transmits to the third voltage conversion unit 33 through the second input / output end of the third voltage conversion unit 33, and further converts by the third voltage conversion unit 33, and then transmits to the voltage conversion module 20 through the first input / output end of the third voltage conversion unit 33. The voltage conversion module 20 converts the direct current voltage outputted by it to alternating current voltage to supply power to the load 300.

[0060] The technical scheme of the embodiment of the utility model discloses first voltage conversion unit 31, second voltage conversion unit 32 and third voltage conversion unit 33 are included in the passage switching module 30 set up, can promote the efficiency and energy utilization rate of photovoltaic power generation and wind power generation, and can promote the efficiency and energy utilization rate of the charging and discharging of energy storage module 10. Meanwhile, the permanent magnet DC wind driven generator, energy storage module 10, photovoltaic panel are directly coupled to the DC bus through DC / DC converter, and the link of first-stage DC / AC (Direct Current to Alternating Current, direct current-alternating current converter) inversion is saved, and the efficiency is further improved. By setting first voltage conversion unit 31 and second voltage conversion unit 32, an independent, controllable energy input channel is added for the power electronic device based on the wind-solar-storage circuit. Wind energy can be supplemented by solar energy and commercial power.

[0061] Figure 4 The utility model provides a kind of power flow and signal control schematic diagram of wind-solar-storage circuit for the embodiment of the utility model, refer to Figure 4 On the basis of each embodiment described above, optionally, the wind-solar-storage circuit further includes a control module 40 connected to the energy storage module 10, the voltage conversion module 20, the passage switching module 30, the photovoltaic power generation module 100 and the wind power generation module 200, respectively. The control module 40 is used to control the passage switching module 30 to switch the passage and convert the voltage, so as to charge the energy storage module 10 by at least one of the photovoltaic power generation module 100, the commercial power and the wind power generation module 200, and to supply power to the load 300 by at least one of the photovoltaic power generation module 100, the commercial power, the wind power generation module 200 and the energy storage module 10 through the voltage conversion module 20.

[0062] Among them, the photovoltaic power generation module 100 includes a photovoltaic panel, the wind power generation module 200 includes a wind driven generator, the control module 40 includes an MCU (Microcontroller Unit), which can be used as a monitoring system, the energy storage module 10 includes a battery, and the voltage conversion module 20 includes an inverter. The arrow is the direction of power flow, the dashed line is the signal line, and the MCU controls each module through the signal bus.

[0063] Specifically, the control module 40 controls the battery, the inverter, the photovoltaic panel and the fan through the communication bus. For example, the control module 40 controls the path switching module 30 to switch the path and convert the voltage, so as to realize charging the energy storage module 10 through at least one of the photovoltaic power generation module 100 and the wind power generation module 200, and realize supplying power to the load 300 through at least one of the photovoltaic power generation module 100 and the wind power generation module 200 through the voltage conversion module 20. The specific working process of the wind-solar energy storage circuit can refer to the description of the above-mentioned embodiments, which will not be repeated here.

[0064] Figure 5 Another structure diagram of the wind-solar energy storage circuit provided by the embodiment of the utility model, see Figure 5 On the basis of the above-mentioned embodiments, optionally, the path switching module 30 only accesses the commercial power, at this time, the path switching module 30 can access two commercial powers 400, the two commercial powers 400 are connected in parallel, or only one commercial power 400 can be accessed. At this time, the power electronic device based on the wind-solar energy storage circuit can act as an UPS to provide power supply for the load 300.

[0065] For example, when the wind-solar energy storage circuit and the power electronic device based on the wind-solar energy storage circuit are configured as a backup power supply mode, the ports for photovoltaic and wind power generation can be connected in parallel to the commercial power 400, and work in a PFC (Power Factor Correction, power factor correction) rectification state, at this time, the device can act as an UPS to provide power supply for the load.

[0066] Figure 6 Another power flow and signal control diagram of the wind-solar energy storage circuit provided by the embodiment of the utility model, see Figure 6 On the basis of the above-mentioned embodiments, optionally, the wind-solar energy storage circuit further comprises a control module 40, which is connected with the energy storage module 10, the voltage conversion module 20, the path switching module 30, the photovoltaic power generation module 100 and the wind power generation module 200 respectively, and the control module 40 is used for controlling the path switching module 30 to switch the path and convert the voltage, so as to realize charging the energy storage module 10 through at least one of the photovoltaic power generation module 100, the commercial power and the wind power generation module 200, and realize supplying power to the load 300 through at least one of the photovoltaic power generation module 100, the commercial power, the wind power generation module 200 and the energy storage module 10 through the voltage conversion module 20.

[0067] The photovoltaic power generation module 100 comprises a photovoltaic panel, the wind power generation module 200 comprises a wind turbine, the control module 40 comprises an MCU (Microcontroller Unit), the energy storage module 10 comprises a battery, and the voltage conversion module 20 comprises an inverter. The arrow is the flow direction of the power flow, and the dashed line is a signal line. The MCU controls each module through a signal bus.

[0068] Specifically, the control module 40 is configured to control the path switching module 30 to perform path switching and voltage conversion, so as to charge the energy storage module 10 by the commercial power 400, and to supply the load 300 by the commercial power 400 through the voltage conversion module 20. The specific working process of the wind-solar-storage power supply circuit can be referred to the description of the above-mentioned embodiments, which will not be repeated here.

[0069] Optionally, on the basis of the above-mentioned embodiments, the path switching module 30 comprises a first port, a second port, a third port and a fourth port. The first port is connected to the photovoltaic power generation module 100 or the commercial power 400, and the second port is connected to the commercial power 400 or the wind power generation module 200. The third port is connected to the energy storage module 10, and the fourth port is connected to the voltage conversion module 20. That is, the first port can be a photovoltaic interface, the second port can be a wind turbine interface, the third port can be a battery interface, and the fourth port can be an inverter interface.

[0070] Figure 7 A structure diagram of a first voltage conversion unit provided by the embodiment of the present application is shown in the figure, Figure 8 A structure diagram of a second voltage conversion unit provided by the embodiment of the present application is shown in the figure, Figure 9 A structure diagram of a third voltage conversion unit provided by the embodiment of the present application is shown in the figure, Figure 10 A structure diagram of a voltage conversion module provided by the embodiment of the present application is shown in the figure, Figures 7 to 10 On the basis of the above-mentioned embodiments, the first voltage conversion unit 31 and the second voltage conversion unit 32 comprise a first switching subunit 301, a second switching subunit 302 and a first voltage conversion subunit 303.

[0071] In the first voltage conversion unit 31, the input end of the first voltage conversion subunit 303 is connected to the photovoltaic power generation module 100 through the first switching subunit 301 and connected to the commercial power 400 through the second switching subunit 302. In the second voltage conversion unit 32, the input end of the first voltage conversion subunit 303 is connected to the wind power generation module 200 through the first switching subunit 301 and connected to the commercial power 400 through the second switching subunit 302. The output end of the first voltage conversion subunit 303 is connected to the first input / output end of the third voltage conversion unit 33 and connected to the input end of the voltage conversion module 20.

[0072] The output end of the first voltage conversion sub-unit 303 includes a third output end OUT1 and a fourth output end OUT2. The third output end OUT1 of the first voltage conversion sub-unit 303 serves as the first output end of the first voltage conversion unit 31 and the first output end of the second voltage conversion unit 32. The fourth output end OUT2 of the first voltage conversion sub-unit 303 serves as the second output end of the first voltage conversion unit 31 and the second output end of the second voltage conversion unit 32. The first input-output end of the third voltage conversion unit 33 includes a first input-output connection end IN / OUT11 and a second input-output connection end IN / OUT12. The second input-output end of the third voltage conversion unit 33 includes a third input-output connection end IN / OUT21 and a fourth input-output connection end IN / OUT22. The third output end OUT1 of the first voltage conversion sub-unit 303 is connected to the first input-output connection end IN / OUT11 of the third voltage conversion unit 33. The fourth output end OUT2 of the first voltage conversion sub-unit 303 is connected to the second input-output connection end IN / OUT12 of the third voltage conversion unit 33.

[0073] Specifically, the first switch sub-unit 301 and the second switch sub-unit 302 are not turned on at the same time, and the control ends of the first switch sub-unit 301 and the second switch sub-unit 302 are connected to a control module 40 (not shown in the figure). That is, at the same time, the first port of the path switching module 30 only inputs one of the voltage provided by the commercial power supply 400 and the voltage provided by the photovoltaic power generation module 100. Similarly, the second port of the path switching module 30 only inputs one of the voltage provided by the commercial power supply 400 and the voltage provided by the wind power generation module 200.

[0074] Optionally, the first voltage conversion sub-unit 303 includes a first inductor L1, a second inductor L2, a first transistor Q1, a second transistor Q2, a first capacitor C1, a second capacitor C2, a third capacitor C3, a first diode D1, and a second diode D2.

[0075] The first end of the first inductor L1 is connected to the first end of the photovoltaic power generation module 100 or the first end of the wind power generation module 200 through the first switch subunit 301, and is connected to the first power supply end of the commercial power 400 through the second switch subunit 302, the second end of the first inductor L1 is connected to the first electrode of the first transistor Q1, the first electrode of the first transistor Q1 is connected to the anode of the first diode D1, the cathode of the first diode D1 is connected to the first end of the first capacitor C1, and the first end of the first capacitor C1 is used as the first output end of the first voltage conversion unit 31 and the first output end of the second voltage conversion unit 32; the first end of the second inductor L2 is connected to the second end of the photovoltaic power generation module 100, the second end of the wind power generation module 200 or the second power supply end of the commercial power 400, the second end of the second inductor L2 is connected to the second electrode of the second transistor Q2, the first electrode of the second transistor Q2 is connected to the second electrode of the first transistor Q1, the second electrode of the second transistor Q2 is connected to the cathode of the second diode D2, the anode of the second diode D2 is connected to the first end of the second capacitor C2, and the second end of the second capacitor C2 is connected to the second end of the first capacitor C1, and the first end of the second capacitor C2 is used as the second output end of the first voltage conversion unit 31 and the second output end of the second voltage conversion unit 32; the first end of the third capacitor C3 is connected to the first end of the first inductor L1, and the second end of the third capacitor C3 is connected to the first end of the second inductor L2.

[0076] The common end of the first transistor Q1 and the second transistor Q2 in the first voltage conversion unit 31 is connected to the first output end INV_N of the voltage conversion module 20, and the common end of the first transistor Q1 and the second transistor Q2 in the second voltage conversion unit 32 is grounded (GND).

[0077] The first inductor L1 and the second inductor L2 are used for energy storage, storing energy when turned on and releasing energy when turned off. The first transistor Q1 and the second transistor Q2 are used for controlling current on-off and adjusting duty cycle. The first diode D1 and the second diode D2 are used for preventing reverse current and forming a freewheeling circuit when the switch is turned off. The first capacitor C1 and the second capacitor C2 are used for filtering and reducing output voltage ripple. The third capacitor C3 is used for energy storage.

[0078] Optionally, the first switch subunit 301 includes a first switch S1, and the second switch subunit 302 includes a second switch S2.

[0079] Specifically, the first voltage conversion subunit 303 constitutes a double-Boost circuit, and when working in a DC / DC mode, the first capacitor C1 and the second capacitor C2 are respectively subjected to voltage regulation to ensure that the voltages of the series-connected capacitors are balanced.

[0080] Specifically, the first voltage conversion subunit 303 constitutes a double-Boost circuit, and when working in a DC / DC mode, the first capacitor C1 and the second capacitor C2 are respectively subjected to voltage regulation to ensure that the voltages of the series-connected capacitors are balanced. Figure 9Optionally, the third voltage conversion unit 33 comprises a second voltage conversion sub-unit 331. The third input / output terminal of the second voltage conversion sub-unit 331 is connected to the output terminal of the first voltage conversion unit 31 and the output terminal of the second voltage conversion unit 32, and the fourth input / output terminal of the second voltage conversion sub-unit 331 is connected to the energy storage module 10.

[0081] The third input / output terminal of the second voltage conversion sub-unit 331 comprises a fifth input / output connection terminal and a sixth input / output connection terminal, the fifth input / output connection terminal being the first input / output connection terminal IN / OUT 11 of the third voltage conversion unit 33, and the sixth input / output connection terminal being the second input / output connection terminal IN / OUT 12 of the third voltage conversion unit 33. The fourth input / output terminal of the second voltage conversion sub-unit 331 comprises a seventh input / output connection terminal and an eighth input / output connection terminal, the seventh input / output connection terminal being the third input / output connection terminal IN / OUT 21 of the third voltage conversion unit 33, and the eighth input / output connection terminal being the fourth input / output connection terminal IN / OUT 22 of the third voltage conversion unit 33.

[0082] Optionally, the second voltage conversion sub-unit 331 comprises a third inductor L3, a fourth inductor L4, a third transistor Q3, a fourth transistor Q4, a fifth transistor Q5, a sixth transistor Q6, a fourth capacitor C4, a fifth capacitor C5, and a sixth capacitor C6.

[0083] The first terminal of the third inductor L3 is connected to the first pole of the third transistor Q3, the first pole of the third transistor Q3 is connected to the second pole of the fourth transistor Q4, the first pole of the fourth transistor Q4 is connected to the first terminal of the fourth capacitor C4, and the first terminal of the fourth capacitor C4 is connected to the first output terminal of the first voltage conversion unit 31 and the first output terminal of the second voltage conversion unit 32.

[0084] The first terminal of the fourth inductor L4 is connected to the second pole of the fifth transistor Q5, the first pole of the fifth transistor Q5 is connected to the second pole of the third transistor Q3, the first pole of the fifth transistor Q5 is grounded, the second pole of the fifth transistor Q5 is connected to the first pole of the sixth transistor Q6, the second pole of the sixth transistor Q6 is connected to the first terminal of the fifth capacitor C5, the first terminal of the fifth capacitor C5 is connected to the second output terminal of the first voltage conversion unit 31 and the second output terminal of the second voltage conversion unit 32; the second terminal of the fifth capacitor C5 is connected to the second terminal of the fourth capacitor C4; the first terminal of the sixth capacitor C6 is connected to the second terminal of the third inductor L3, and the second terminal of the sixth capacitor C6 is connected to the second terminal of the fourth inductor L4. The second terminal of the third inductor L3 is the third input / output connection terminal IN / OUT 21 of the third voltage conversion unit 33, and the second terminal of the fourth inductor L4 is the fourth input / output connection terminal IN / OUT 22 of the third voltage conversion unit 33.

[0085] The third inductor L3 and the fourth inductor L4 are used for energy storage, storing energy when turned on and releasing energy when turned off. The third transistor Q3, the fourth transistor Q4, the fifth transistor Q5 and the sixth transistor Q6 are used for controlling current on-off and adjusting duty cycle. The fourth capacitor C4 and the fifth capacitor C5 are used for filtering and reducing output voltage ripple. The sixth capacitor C6 is used for energy storage.

[0086] Specifically referring to Figure 10 Optionally, the voltage conversion module 20 comprises a first switching unit 21, a second switching unit 22, a first energy storage unit 23 and a second energy storage unit 24.

[0087] The first end of the first switching unit 21 is connected to the first output end of the first voltage conversion unit 31, the second end of the first switching unit 21 is connected to the first end of the second switching unit 22, the second end of the second switching unit 22 is connected to the second output end of the first voltage conversion unit 31, the second end of the first switching unit 21 is connected to the first end of the first energy storage unit 23, the second end of the first energy storage unit 23 is connected to the first end of the second energy storage unit 24, the first end of the second energy storage unit 24 is the second output end INV_L of the voltage conversion module 20, and the second end of the second energy storage unit 24 is the first output end INV_N of the voltage conversion module 20.

[0088] The voltage conversion module 20 is used for converting an input DC voltage into an AC voltage to supply power to the load 300.

[0089] Optionally, the first switching unit 21 comprises a seventh transistor Q7, the second switching unit 22 comprises an eighth transistor Q8, the first energy storage unit 23 comprises a fifth inductor L5, and the second energy storage unit 24 comprises a seventh capacitor C7.

[0090] The first pole of the seventh transistor Q7 is connected to the first output end of the first voltage conversion unit 31, the second pole of the seventh transistor Q7 is connected to the first pole of the eighth transistor Q8, the second pole of the eighth transistor Q8 is connected to the second output end of the first voltage conversion unit 31, the second pole of the seventh transistor Q7 is connected to the first end of the fifth inductor L5, the second end of the fifth inductor L5 is connected to the first end of the seventh capacitor C7, the first end of the seventh capacitor C7 is the second output end INV_L of the voltage conversion module 20, and the second end of the seventh capacitor C7 is the first output end INV_N of the voltage conversion module 20.

[0091] The second output end INV_L of the voltage conversion module 20 is connected to the first power supply end of the load 300, and the first output end INV_N of the voltage conversion module 20 is connected to the second power supply end of the load 300. The circuit is specifically an inverter circuit, and the inverter is controlled in a half-bridge two-level manner to output AC power to the load.

[0092] It can be understood that the control electrodes of the first transistor Q1, the second transistor Q2, the third transistor Q3, the fourth transistor Q4, the fifth transistor Q5, the sixth transistor Q6, the seventh transistor Q7 and the eighth transistor Q8 are connected to the control module 40. Figures 7-10 For the convenience of description, the connection relationship between each transistor and the control module 40 is not specifically shown.

[0093] In summary, the wind-solar power storage circuit provided by the embodiment of the present application directly couples the permanent magnet DC wind power generator, the energy storage battery and the photovoltaic panel to the DC bus through the DC / DC converter, thereby omitting the first-stage DC / AC inversion link and improving the efficiency. When the circuit is not connected to the wind power generation and the photovoltaic panel, another power supply can be directly connected as a backup power supply, thereby increasing the versatility of the device. Compared with the prior art, the wind-solar power storage circuit integrating the wind power, the photovoltaic power, the energy storage, the inversion and the power distribution management system is designed, so that the device based on the wind-solar power storage circuit can omit the first-stage DC / AC inversion in the AC coupling. Compared with the traditional wind-solar power storage device, when facing different scenes such as marine, household, off-shore island and household energy storage, the function modules can be flexibly selected and matched to form the light storage, the wind storage, the wind-solar storage and the UPS unit, and the system capacity can be easily expanded in the future. Moreover, the diesel generator set can be replaced by the wind-solar power storage circuit as a backup emergency power supply. The novel multipurpose wind-solar power storage circuit and the device thereof can also realize the bidirectional interaction with the user and lead the intelligent life.

[0094] It should be understood that the various forms of flow shown above can be used to reorder, add or delete steps. For example, the steps described in the present application can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solutions of the present application can be achieved, which is not limited herein.

[0095] The above specific embodiments do not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent replacement and improvement made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A wind-solar-storage power conversion circuit, characterized in that, The application relates to a power supply system, which comprises: a storage module; a voltage conversion module connected to the storage module, the voltage conversion module being used for voltage conversion of the voltage output by the storage module to supply power to a load; a path switching module connected to the storage module and the voltage conversion module, the path switching module being used for providing a path for charging the storage module by at least one of a photovoltaic power generation module, commercial power and a wind power generation module and performing voltage conversion, and the path switching module being used for providing a path for supplying power to the load by at least one of the photovoltaic power generation module, the commercial power, the wind power generation module and the storage module through the voltage conversion module and performing voltage conversion.

2. The wind-solar-storage power routing circuit according to claim 1, characterized in that, The path switching module comprises a first voltage conversion unit, a second voltage conversion unit and a third voltage conversion unit; an input end of the first voltage conversion unit is connected to the photovoltaic power generation module or the commercial power, an input end of the second voltage conversion unit is connected to the wind power generation module or the commercial power, an output end of the first voltage conversion unit and an output end of the second voltage conversion unit are connected to a first input-output end of the third voltage conversion unit, a second input-output end of the third voltage conversion unit is connected to the storage module, and the output end of the first voltage conversion unit and the output end of the second voltage conversion unit are also connected to the voltage conversion module.

3. The wind-solar-storage power routing circuit according to claim 2, characterized in that, The first voltage conversion unit and the second voltage conversion unit each comprise a first switch subunit, a second switch subunit and a first voltage conversion subunit; in the first voltage conversion unit, an input end of the first voltage conversion subunit is connected to the photovoltaic power generation module through the first switch subunit and connected to the commercial power through the second switch subunit, and in the second voltage conversion unit, an input end of the first voltage conversion subunit is connected to the wind power generation module through the first switch subunit and connected to the commercial power through the second switch subunit; an output end of the first voltage conversion subunit is connected to the first input-output end of the third voltage conversion unit and connected to an input end of the voltage conversion module.

4. The wind-solar-storage power routing circuit according to claim 3, characterized in that, The first voltage conversion subunit comprises a first inductor, a second inductor, a first transistor, a second transistor, a first capacitor, a second capacitor, a third capacitor, a first diode and a second diode. The first end of the first inductor is connected to the first end of the photovoltaic power generation module or the first end of the wind power generation module through the first switch subunit, and is connected to the first power supply end of the commercial power through the second switch subunit, the second end of the first inductor is connected to the first electrode of the first transistor, the first electrode of the first transistor is connected to the anode of the first diode, the cathode of the first diode is connected to the first end of the first capacitor, and the first end of the first capacitor is used as the first output end of the first voltage conversion unit and the first output end of the second voltage conversion unit; the first end of the second inductor is connected to the second end of the photovoltaic power generation module, the second end of the wind power generation module or the second power supply end of the commercial power, the second end of the second inductor is connected to the second electrode of the second transistor, the first electrode of the second transistor is connected to the second electrode of the first transistor, the second electrode of the second transistor is connected to the cathode of the second diode, the anode of the second diode is connected to the first end of the second capacitor, the second end of the second capacitor is connected to the second end of the first capacitor, and the first end of the second capacitor is used as the second output end of the first voltage conversion unit and the second output end of the second voltage conversion unit; the first end of the third capacitor is connected to the first end of the first inductor, and the second end of the third capacitor is connected to the first end of the second inductor. The common end of the first transistor and the second transistor in the first voltage conversion unit is connected to the first output end of the voltage conversion module, and the common end of the first transistor and the second transistor in the second voltage conversion unit is grounded.

5. The wind-solar-storage power routing circuit of claim 2, wherein, The third voltage conversion unit comprises a second voltage conversion subunit. The third input / output end of the second voltage conversion subunit is connected to the output end of the first voltage conversion unit and the output end of the second voltage conversion unit, and the fourth input / output end of the second voltage conversion subunit is connected to the energy storage module.

6. The wind-solar-storage power routing circuit according to claim 5, characterized in that, The second voltage conversion subunit comprises a third inductor, a fourth inductor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a fourth capacitor, a fifth capacitor and a sixth capacitor. The first end of the third inductor is connected to the first electrode of the third transistor, the first electrode of the third transistor is connected to the second electrode of the fourth transistor, the first electrode of the fourth transistor is connected to the first end of the fourth capacitor, and the first end of the fourth capacitor is connected to the first output end of the first voltage conversion unit and the first output end of the second voltage conversion unit. The first end of the third inductor is connected to the first electrode of the third transistor, the first electrode of the third transistor is connected to the second electrode of the fourth transistor, the first electrode of the fourth transistor is connected to the first end of the fourth capacitor, and the first end of the fourth capacitor is connected to the first output end of the first voltage conversion unit and the first output end of the second voltage conversion unit. The first end of the fourth inductor is connected to the second electrode of the fifth transistor, the first electrode of the fifth transistor is connected to the second electrode of the third transistor, the first electrode of the fifth transistor is grounded, the second electrode of the fifth transistor is connected to the first electrode of the sixth transistor, the second electrode of the sixth transistor is connected to the first end of the fifth capacitor, and the first end of the fifth capacitor is connected to the second output end of the first voltage conversion unit and the second output end of the second voltage conversion unit; the second end of the fifth capacitor is connected to the second end of the fourth capacitor; the first end of the sixth capacitor is connected to the second end of the third inductor, and the second end of the sixth capacitor is connected to the second end of the fourth inductor.

7. The wind-solar-storage power routing circuit of claim 2, wherein, The voltage conversion module comprises a first switching unit, a second switching unit, a first energy storage unit and a second energy storage unit. The first end of the first switching unit is connected to the first output end of the first voltage conversion unit, the second end of the first switching unit is connected to the first end of the second switching unit, the second end of the second switching unit is connected to the second output end of the first voltage conversion unit, the second end of the first switching unit is connected to the first end of the first energy storage unit, the second end of the first energy storage unit is connected to the first end of the second energy storage unit, the first end of the second energy storage unit serves as the second output end of the voltage conversion module, and the second end of the second energy storage unit serves as the first output end of the voltage conversion module.

8. The wind-solar-storage power routing circuit according to claim 7, characterized in that, The first switching unit comprises a seventh transistor, the second switching unit comprises an eighth transistor, the first energy storage unit comprises a fifth inductor, and the second energy storage unit comprises a seventh capacitor. The first electrode of the seventh transistor is connected to the first output end of the first voltage conversion unit, the second electrode of the seventh transistor is connected to the first electrode of the eighth transistor, the second electrode of the eighth transistor is connected to the second output end of the first voltage conversion unit, the second electrode of the seventh transistor is connected to the first end of the fifth inductor, the second end of the fifth inductor is connected to the first end of the seventh capacitor, the first end of the seventh capacitor serves as the second output end of the voltage conversion module, and the second end of the seventh capacitor serves as the first output end of the voltage conversion module.

9. The wind-solar-storage power routing circuit of claim 1, wherein, The control module is further included and is connected to the energy storage module, the voltage conversion module, the path switching module, the photovoltaic power generation module and the wind power generation module respectively, and is configured to control the path switching module to perform path switching and voltage conversion, so as to charge the energy storage module by at least one of the photovoltaic power generation module, commercial power and the wind power generation module, and to supply power to the load by at least one of the photovoltaic power generation module, the commercial power, the wind power generation module and the energy storage module through the voltage conversion module.

10. The wind-solar power storage circuit of claim 1, wherein, The passage switching module comprises a first port, a second port, a third port and a fourth port, the first port is connected with the photovoltaic power generation module or the commercial power, the second port is connected with the commercial power or the wind power generation module; the third port is connected with the energy storage module, and the fourth port is connected with the voltage conversion module.

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