Power conversion method, device, equipment and medium

Abstract

The present invention provides a power conversion method, device, equipment and medium. The power conversion device includes: a configurable input interface, a power conversion circuit, and a configurable output interface; the configurable input interface is used to configure a first electrical connection mode between an input power source and a power conversion circuit, and electrically connect the input power source and the power conversion circuit; the configurable output interface is used to configure a second electrical connection mode between a load and a power conversion circuit, and electrically connect the load and the power conversion circuit; the power conversion circuit is used to perform corresponding power conversion according to the parameters of the input power source and the parameters of the load. The present invention solves the problem of poor versatility of power conversion devices in related technologies and improves the versatility of power conversion devices.

Description

Technical Field

[0001] The present invention relates to the field of power conversion, and in particular to a power conversion method, device, equipment and medium. Background Art

[0002] Since the configurations of existing photovoltaic power generation systems, wind power generation systems, solar power generation systems, or AC power grids are very different, the corresponding power conversion devices are also very numerous and cannot be universal, resulting in complex power supply devices used in the system, poor universality and maintainability. Summary of the invention

[0003] The present invention provides a power conversion method, device, equipment and medium to at least solve the problem of poor universality of power conversion devices in related technologies.

[0004] In a first aspect, an embodiment of the present invention provides a power conversion device, comprising: a configurable input interface, a power conversion circuit, and a configurable output interface; wherein:

[0005] The configurable input interface is used to configure a first electrical connection mode between an input power source and the power conversion circuit, and electrically connect the input power source and the power conversion circuit;

[0006] The configurable output interface is used to configure a second electrical connection mode between the load and the power conversion circuit, and electrically connect the load and the power conversion circuit;

[0007] The power conversion circuit is used to perform corresponding power conversion according to the parameters of the input power supply and the parameters of the load.

[0008] In a second aspect, an embodiment of the present invention provides a power conversion method of the voltage conversion device of the first aspect, comprising:

[0009] According to the parameters of the input power supply and the parameters of the load, a single-pole double-throw switch K1, a single-pole double-throw switch K2, a single-pole double-throw switch K3 and a single-pole double-throw switch K4 are configured;

[0010] The on and off of the transistors in the switch tube group are controlled according to rules corresponding to the parameters of the input power supply and the parameters of the load.

[0011] In a third aspect, an embodiment of the present invention provides a power conversion device, comprising: at least one processor, at least one memory, and computer program instructions stored in the memory, and when the computer program instructions are executed by the processor, the method described in the second aspect is implemented.

[0012] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium having computer program instructions stored thereon, which implement the method described in the second aspect when the computer program instructions are executed by a processor.

[0013] The power conversion method, device, equipment and medium provided by the embodiments of the present invention, the power conversion device used includes: a configurable input interface, a power conversion circuit, and a configurable output interface; wherein the configurable input interface is used to configure a first electrical connection mode between an input power source and a power conversion circuit, and electrically connect the input power source and the power conversion circuit; the configurable output interface is used to configure a second electrical connection mode between a load and a power conversion circuit, and electrically connect the load and the power conversion circuit; the power conversion circuit is used to perform corresponding power conversion according to the parameters of the input power source and the parameters of the load, thereby solving the problem of poor versatility of the power conversion device in the related art and improving the versatility of the power conversion device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0015] Figure 1 is a structural block diagram of a power conversion device according to an embodiment of the present invention;

[0016] Figure 2 The circuit structure of the power conversion device according to the embodiment of the present invention is Figure 1 ;

[0017] Figure 3 The circuit structure of the power conversion device according to the embodiment of the present invention is Figure 2 ;

[0018] Figure 4 The circuit structure of the power conversion device according to the embodiment of the present invention is Figure 3 ;

[0019] Figure 5 is a flow chart of a power conversion method according to an embodiment of the present invention;

[0020] Figure 6 Schematic diagram of the hardware structure of a power conversion device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and Examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention.

[0022] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0023] In this embodiment, a power conversion device is provided. Figure 1 is a structural block diagram of a power conversion device according to an embodiment of the present invention. Figure 1 As shown, the device comprises: a configurable input interface 1, a power conversion circuit 2, and a configurable output interface 3; wherein,

[0024] A configurable input interface 1, used to configure a first electrical connection mode between an input power source and a power conversion circuit 2, and electrically connect the input power source and the power conversion circuit 2;

[0025] A configurable output interface 3, used to configure a second electrical connection mode between the load and the power conversion circuit 2, and electrically connect the load and the power conversion circuit 2;

[0026] The power conversion circuit 2 is used to perform corresponding power conversion according to the parameters of the input power supply and the parameters of the load.

[0027] Through the above-mentioned device, a configurable input interface and a configurable output interface are used to connect to the power conversion circuit according to different electrical connection methods. The power conversion circuit performs corresponding power conversion according to the parameters of the input power supply and the parameters of the load, so that the power conversion device can adapt to the power conversion requirements of various input power supplies and loads for AC voltage, DC voltage, voltage boost, and voltage step-down, thereby solving the problem of poor versatility of the power conversion device in the related art and improving the versatility of the power conversion device.

[0028] The above-mentioned input power sources include, but are not limited to: photovoltaic power generation grid, wind power generation grid, energy storage system, AC power grid, etc., and the above-mentioned loads include DC loads and AC loads.

[0029] Optionally, the power conversion performed by the power conversion circuit includes at least two of the following: DC / DC boost conversion, DC / DC buck conversion, AC / DC conversion, DC / AC conversion, AC / AC conversion, DC / DC boost conversion first and then DC / AC conversion. These power conversion functions can be implemented by using multiple independent circuits, for example, the DC / DC boost conversion circuit is a separate circuit, the DC / DC buck circuit is a separate circuit, etc., and except for sharing the input and output terminals through the configurable input interface and the configurable output interface, the other parts of the circuits are independent of each other.

[0030] Preferably, in this embodiment, the power conversion function is implemented by a circuit. In this embodiment, the power conversion function is implemented by using a power conversion circuit as an example. Figure 2 is a circuit diagram of a power conversion device according to an embodiment of the present invention. Figure 2 This embodiment is described and illustrated.

[0031] Optionally, the configurable input interface 1 includes: a single-pole double-throw switch K1 and a single-pole double-throw switch K2, wherein the fixed end K1-1 of the single-pole double-throw switch K1 and the fixed end K2-1 of the single-pole double-throw switch K2 are respectively used to electrically connect to the input power supply; the moving end K1-2 and the moving end K1-3 of the single-pole double-throw switch K1, and the moving end K2-2 and the moving end K2-3 of the single-pole double-throw switch K2 are respectively used to electrically connect to the four input ends of the power conversion circuit; wherein the moving end K1-2, the moving end K1-3, the moving end K2-2 and the moving end K2-3 are electrically connected to the input end IN1, the input end IN2, the input end IN3 and the input end IN4 of the power conversion circuit one by one.

[0032] Optionally, the configurable output interface 3 includes: a single-pole double-throw switch K3 and a single-pole double-throw switch K4, wherein the fixed end K3-1 of the single-pole double-throw switch K3 and the fixed end K4-1 of the single-pole double-throw switch K4 are respectively used to electrically connect to the load; the moving end K3-2 and the moving end K3-3 of the single-pole double-throw switch K3, and the moving end K4-2 and the moving end K4-3 of the single-pole double-throw switch K4 are respectively used to electrically connect to the four output ends of the power conversion circuit; wherein the moving end K3-2, the moving end K3-3, the moving end K4-2 and the moving end K4-3 are electrically connected to the output end OUT1, the output end OUT2, the output end OUT3 and the output end OUT4 of the power conversion circuit one by one.

[0033] The above-mentioned single-pole double-throw switch is preferably a relay or a contactor to achieve automatic circuit control.

[0034] Optionally, the power conversion circuit 2 includes: an input terminal IN1, an input terminal IN2, an input terminal IN3, an input terminal IN4, an output terminal OUT1, an output terminal OUT2, an output terminal OUT3, an output terminal OUT4, a switch tube group S1, a switch tube group S2, a switch tube group S3, a switch tube group S4, a switch tube group S5, a switch tube group S6, a switch tube group S7, a switch tube group S8, an inductor L1, an inductor L2, and a capacitor C, wherein the input terminal IN1 is electrically connected to the output terminal OUT1; the input terminal IN4 is electrically connected to the output terminal OUT4; the switch tube group S1 and the switch tube group S2, and the switch tube group S3 and the switch tube group S8 connected in series in the same direction are connected in series in the same direction. 4. The capacitor C, the switch tube group S5 and the switch tube group S6 connected in series in the same direction, and the switch tube group S7 and the switch tube group S8 connected in series in the same direction are connected in parallel between the input terminal IN1 and the input terminal IN4; the inductor L1 is connected in series between the input terminal IN2 and the series node of the switch tube group S1 and the switch tube group S2; the inductor L2 is connected in series between the output terminal OUT2 and the series node of the switch tube group S5 and the switch tube group S6; the input terminal IN3 is electrically connected to the series node of the switch tube group S3 and the switch tube group S4; the output terminal OUT3 is electrically connected to the series node of the switch tube group S7 and the switch tube group S8; wherein each of the above-mentioned switch tube groups includes: anti-parallel transistors and diodes.

[0035] refer to Figure 3 Optionally, the power conversion circuit 2 further includes: a PWM control unit, which is used to control the on and off of the transistors in the switch tube group according to a rule corresponding to the combination of the first electrical connection mode and the second electrical connection mode.

[0036] refer to Figure 4 Optionally, the power conversion circuit 2 also includes other peripheral circuits, which are used to realize automatic control of the single-pole double-throw switches K1~K4, sampling of the voltage and current of the input interface and the output interface, and other functions.

[0037] Through the above power conversion device, multiple power conversions can be achieved using one circuit, which greatly reduces the size of the device.

[0038] The control method of the above power conversion device, that is, the power conversion method, will be described and illustrated below.

[0039] Figure 5 is a flow chart of a power conversion method according to an embodiment of the present invention. Figure 5 As shown, the method comprises the following steps:

[0040] Step S501, configuring a single-pole double-throw switch K1, a single-pole double-throw switch K2, a single-pole double-throw switch K3 and a single-pole double-throw switch K4 according to the parameters of the input power supply and the parameters of the load;

[0041] Step S502, controlling the on and off of the transistors in the switch tube group according to the rules corresponding to the parameters of the input power supply and the parameters of the load.

[0042] According to different power conversion requirements, the configuration of the single-pole double-throw switches K1 to K4 is different, and the on-off control rules of the transistors of the switch tube group S1 to S8 are also different. Figure 3 Explain them separately.

[0043] Optionally, when the input power supply is a DC power supply, the load is a DC load, and the voltage required by the load is higher than the voltage of the input power supply, the fixed end K1-1 of the single-pole double-throw switch K1 is connected to the moving end K1-3, the fixed end K2-1 of the single-pole double-throw switch K2 is connected to the moving end K2-3, the fixed end K3-1 of the single-pole double-throw switch K3 is connected to the moving end K3-2, and the fixed end K4-1 of the single-pole double-throw switch K4 is connected to the moving end K4-3; the transistors of the switch tube group S1, the switch tube group S3, the switch tube group S4, the switch tube group S5, the switch tube group S6, the switch tube group S7, and the switch tube group S8 are controlled to be locked, and the transistor of the switch tube group S2 is controlled to be turned on and off according to a predetermined frequency. At this time, a DC boost circuit is formed.

[0044] Optionally, when the input power supply is a DC power supply, the load is a DC load, and the voltage required by the load is lower than the voltage of the input power supply, the fixed end K1-1 of the single-pole double-throw switch K1 is connected to the movable end K1-2, the fixed end K2-1 of the single-pole double-throw switch K2 is connected to the movable end K2-3, the fixed end K3-1 of the single-pole double-throw switch K3 is connected to the movable end K3-3, and the fixed end K4-1 of the single-pole double-throw switch K4 is connected to the movable end K4-3; the transistors of the switch tube group S1, the switch tube group S2, the switch tube group S3, the switch tube group S4, the switch tube group S6, the switch tube group S7, and the switch tube group S8 are controlled to be locked, and the transistor of the switch tube group S5 is controlled to be turned on and off according to a predetermined frequency. At this time, a DC step-down circuit is formed.

[0045] Optionally, when the input power source is an AC power source and the load is a DC load, the fixed end K1-1 of the single-pole double-throw switch K1 is connected to the moving end K1-3, the fixed end K2-1 of the single-pole double-throw switch K2 is connected to the moving end K2-2, the fixed end K3-1 of the single-pole double-throw switch K3 is connected to the moving end K3-2, and the fixed end K4-1 of the single-pole double-throw switch K4 is connected to the moving end K4-3; the transistors of the switch tube group S5, the switch tube group S6, the switch tube group S7, and the switch tube group S8 are controlled to be locked, and the transistors of the switch tube group S1, the switch tube group S2, the switch tube group S3, and the switch tube group S4 are controlled to be turned on and off according to a predetermined frequency. At this time, a controllable rectifier circuit is formed.

[0046] Optionally, when the input power source is a DC power source and the load is an AC load, the fixed end K1-1 of the single-pole double-throw switch K1 is connected to the moving end K1-2, the fixed end K2-1 of the single-pole double-throw switch K2 is connected to the moving end K2-3, the fixed end K3-1 of the single-pole double-throw switch K3 is connected to the moving end K3-3, and the fixed end K4-1 of the single-pole double-throw switch K4 is connected to the moving end K4-2; the transistors of the switch tube group S1, the switch tube group S2, the switch tube group S3, and the switch tube group S4 are controlled to be locked, and the transistors of the switch tube group S5, the switch tube group S6, the switch tube group S7, and the switch tube group S8 are controlled to be turned on and off according to a predetermined frequency. At this time, an inverter circuit is formed.

[0047] Optionally, when the input power source is an AC power source and the load is an AC load, the fixed end K1-1 of the single-pole double-throw switch K1 is connected to the moving end K1-3, the fixed end K2-1 of the single-pole double-throw switch K2 is connected to the moving end K2-2, the fixed end K3-1 of the single-pole double-throw switch K3 is connected to the moving end K3-3, and the fixed end K4-1 of the single-pole double-throw switch K4 is connected to the moving end K4-2; the triodes of the switch tube group S1, the switch tube group S2, the switch tube group S3, the switch tube group S4, the switch tube group S5, the switch tube group S6, the switch tube group S7, and the switch tube group S8 are controlled to be turned on and off according to a predetermined frequency. At this time, the switch tube S1, the switch tube group S2, the switch tube group S3, the switch tube group S4 and other components form a controllable rectifier circuit, and the switch tube group S5, the switch tube group S6, the switch tube group S7, the switch tube group S8 and other components form an inverter circuit.

[0048] Optionally, when the input power source is a DC power source, the load is an AC load, and the voltage required by the load needs to be boosted, the fixed end K1-1 of the single-pole double-throw switch K1 is connected to the moving end K1-3, the fixed end K2-1 of the single-pole double-throw switch K2 is connected to the moving end K2-3, the fixed end K3-1 of the single-pole double-throw switch K3 is connected to the moving end K3-3, and the fixed end K4-1 of the single-pole double-throw switch K4 is connected to the moving end K4-2; the transistors of the switch tube group S1, the switch tube group S3, and the switch tube group S4 are controlled to be locked, and the transistors of the switch tube group S2, the switch tube group S5, the switch tube group S6, the switch tube group S7, and the switch tube group S8 are controlled to be turned on and off according to a predetermined frequency. At this time, the switch tube S1, the switch tube group S2, the switch tube group S3, the switch tube group S4 and other components form a boost circuit, and the switch tube group S5, the switch tube group S6, the switch tube group S7, the switch tube group S8 and other components form an inverter circuit.

[0049] Optionally, in order to realize automatic configuration of the configurable input interface and the configurable output interface, current sampling and voltage sampling can be performed on the configurable input interface and the configurable output interface; and the parameters of the input power supply and the parameters of the load can be determined according to the current sampling and the voltage sampling. These power supply parameters and load parameters include: the DC / AC type of the power supply and the load and whether the voltage required by the load needs to be stepped up / down.

[0050] In addition, the configurable attributes of the input and output of the traditional power conversion device are fixed, and can only specify the input connection of AC or DC, and the output of AC or DC; and the configuration of the input and output terminals is strict, and the input and output terminals cannot be universal, and on-site installation and debugging require a large number of experienced technical personnel to guide. Figure 2 The power conversion device of the circuit structure shown has completely identical structures on the left and right sides of the circuit, and there is no need to forcibly define the input and output ends, and the input and output ends can be universal.

[0051] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0052] In addition, combined Figure 5 The power conversion method according to the embodiment of the present invention described above may be implemented by a power conversion device. Figure 6 A schematic diagram of the hardware structure of a power conversion device provided by an embodiment of the present invention is shown.

[0053] The power conversion device may include a processor 61 and a memory 62 storing computer program instructions.

[0054] Specifically, the processor 61 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiment of the present invention.

[0055] The memory 62 may include a large capacity memory for data or instructions. By way of example and not limitation, the memory 62 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive or a combination of two or more of these. Where appropriate, the memory 62 may include a removable or non-removable (or fixed) medium. Where appropriate, the memory 62 may be inside or outside the data processing device. In a particular embodiment, the memory 62 is a non-volatile solid-state memory. In a particular embodiment, the memory 62 includes a read-only memory (ROM). Where appropriate, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM) or a flash memory or a combination of two or more of these.

[0056] The processor 61 implements any one of the power conversion methods in the above embodiments by reading and executing computer program instructions stored in the memory 62 .

[0057] In one example, the power conversion device may further include a communication interface 63 and a bus 60. Figure 6 As shown, the processor 61, the memory 62, and the communication interface 63 are connected via a bus 60 and communicate with each other.

[0058] The communication interface 63 is mainly used to implement communication between various modules, devices, units and / or equipment in the embodiment of the present invention.

[0059] Bus 60 includes hardware, software or both, and the components of power conversion equipment are coupled to each other. For example, but not limitation, bus may include accelerated graphics port (AGP) or other graphics bus, enhanced industrial standard architecture (EISA) bus, front side bus (FSB), hypertransport (HT) interconnection, industrial standard architecture (ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory bus, micro channel architecture (MCA) bus, peripheral component interconnection (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations. In appropriate cases, bus 60 may include one or more buses. Although the embodiment of the present invention describes and shows a specific bus, the present invention considers any suitable bus or interconnection.

[0060] The power conversion device can execute the power conversion method in the embodiment of the present invention based on the acquired data, thereby realizing the combination Figure 5 Describe the power conversion method.

[0061] In addition, in combination with the power conversion method in the above embodiment, the embodiment of the present invention can provide a computer-readable storage medium for implementation. The computer-readable storage medium stores computer program instructions; when the computer program instructions are executed by a processor, any one of the power conversion methods in the above embodiment is implemented.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A power conversion device, characterized in that: include: Configurable input interface, power conversion circuit, and configurable output interface; wherein, The configurable input interface is used to configure a first electrical connection mode between an input power source and the power conversion circuit, and electrically connect the input power source and the power conversion circuit; The configurable input interface includes: a single-pole double-throw switch K1 and a single-pole double-throw switch K2, wherein the fixed end K1-1 of the single-pole double-throw switch K1 and the fixed end K2-1 of the single-pole double-throw switch K2 are respectively used to electrically connect the input power supply; the moving end K1-2 and the moving end K1-3 of the single-pole double-throw switch K1, and the moving end K2-2 and the moving end K2-3 of the single-pole double-throw switch K2 are respectively used to electrically connect the four input ends of the power conversion circuit; wherein the moving end K1-2, the moving end K1-3, the moving end K2-2 and the moving end K2-3 are electrically connected to the input end IN1, the input end IN2, the input end IN3 and the input end IN4 of the power conversion circuit one by one; The configurable output interface is used to configure a second electrical connection mode between the load and the power conversion circuit, and electrically connect the load and the power conversion circuit; The configurable output interface includes: a single-pole double-throw switch K3 and a single-pole double-throw switch K4, wherein the fixed end K3-1 of the single-pole double-throw switch K3 and the fixed end K4-1 of the single-pole double-throw switch K4 are respectively used to electrically connect the load; the moving end K3-2 and the moving end K3-3 of the single-pole double-throw switch K3, and the moving end K4-2 and the moving end K4-3 of the single-pole double-throw switch K4 are respectively used to electrically connect the four output ends of the power conversion circuit; wherein the moving end K3-2, the moving end K3-3, the moving end K4-2 and the moving end K4-3 are electrically connected to the output end OUT1, the output end OUT2, the output end OUT3 and the output end OUT4 of the power conversion circuit one by one; The power conversion circuit is used to perform corresponding power conversion according to the parameters of the input power supply and the parameters of the load; the power conversion includes at least two of the following: DC / DC boost conversion, DC / DC buck conversion, AC / DC conversion, DC / AC conversion, AC / AC conversion, DC / DC boost conversion followed by DC / AC conversion; The power conversion circuit includes: an input terminal IN1, an input terminal IN2, an input terminal IN3, an input terminal IN4, an output terminal OUT1, an output terminal OUT2, an output terminal OUT3, an output terminal OUT4, a switch tube group S1, a switch tube group S2, a switch tube group S3, a switch tube group S4, a switch tube group S5, a switch tube group S6, a switch tube group S7, a switch tube group S8, an inductor L1, an inductor L2, and a capacitor C, wherein the input terminal IN1 is electrically connected to the output terminal OUT1; the input terminal IN4 is electrically connected to the output terminal OUT4; the switch tube group S1 and the switch tube group S2, the switch tube group S3 and the switch tube group S4, the capacitor C, the switch tube group S1 and the switch tube group S2, the switch tube group S3 and the switch tube group S4, the capacitor C, the switch tube group S1 and the switch tube group S2, the switch tube group S3 and the switch tube group S4, the capacitor C, the switch tube group S6, the switch tube group S7, the switch tube group S8, the inductor L1, the inductor L2, and the capacitor C. The switch tube group S5 and the switch tube group S6, and the switch tube group S7 and the switch tube group S8 connected in series in the same direction are connected in parallel between the input terminal IN1 and the input terminal IN4; the inductor L1 is connected in series between the input terminal IN2 and the series node of the switch tube group S1 and the switch tube group S2; the inductor L2 is connected in series between the output terminal OUT2 and the series node of the switch tube group S5 and the switch tube group S6; the input terminal IN3 is electrically connected to the series node of the switch tube group S3 and the switch tube group S4; the output terminal OUT3 is electrically connected to the series node of the switch tube group S7 and the switch tube group S8; wherein each of the above-mentioned switch tube groups includes: anti-parallel transistors and diodes.

2. The device according to claim 1, characterized in that The power conversion circuit further includes: A PWM control unit is used to control the on and off of the transistors in the above-mentioned switch tube group according to rules corresponding to the parameters of the input power supply and the parameters of the load.

3. A power conversion method for a power conversion device according to claim 2, characterized in that: include: According to the parameters of the input power supply and the parameters of the load, a single-pole double-throw switch K1, a single-pole double-throw switch K2, a single-pole double-throw switch K3 and a single-pole double-throw switch K4 are configured; The on and off of the transistors in the switch tube group are controlled according to rules corresponding to the parameters of the input power supply and the parameters of the load.

4. The method according to claim 3, characterized in that: In the case where the input power supply is a DC power supply, the load is a DC load, and the voltage required by the load is higher than the voltage of the input power supply, the method includes: The fixed terminal K1-1 of the single-pole double-throw switch K1 is connected to the movable terminal K1-3, the fixed terminal K2-1 of the single-pole double-throw switch K2 is connected to the movable terminal K2-3, the fixed terminal K3-1 of the single-pole double-throw switch K3 is connected to the movable terminal K3-2, and the fixed terminal K4-1 of the single-pole double-throw switch K4 is connected to the movable terminal K4-3; The transistors of switch tube group S1, switch tube group S3, switch tube group S4, switch tube group S5, switch tube group S6, switch tube group S7 and switch tube group S8 are controlled to be locked, and the transistor of switch tube group S2 is controlled to be turned on and off according to a predetermined frequency.

5. The method according to claim 3, characterized in that: In the case where the input power source is a DC power source, the load is a DC load, and the voltage required by the load is lower than the voltage of the input power source, the method includes: The fixed terminal K1-1 of the single-pole double-throw switch K1 is connected to the movable terminal K1-2, the fixed terminal K2-1 of the single-pole double-throw switch K2 is connected to the movable terminal K2-3, the fixed terminal K3-1 of the single-pole double-throw switch K3 is connected to the movable terminal K3-3, and the fixed terminal K4-1 of the single-pole double-throw switch K4 is connected to the movable terminal K4-3; The transistors of the switch tube group S1, the switch tube group S2, the switch tube group S3, the switch tube group S4, the switch tube group S6, the switch tube group S7, and the switch tube group S8 are controlled to be locked, and the transistor of the switch tube group S5 is controlled to be turned on and off according to a predetermined frequency.

6. The method according to claim 3, characterized in that: When the input power source is an AC power source and the load is a DC load, the method includes: The fixed terminal K1-1 of the single-pole double-throw switch K1 is connected to the movable terminal K1-3, the fixed terminal K2-1 of the single-pole double-throw switch K2 is connected to the movable terminal K2-2, the fixed terminal K3-1 of the single-pole double-throw switch K3 is connected to the movable terminal K3-2, and the fixed terminal K4-1 of the single-pole double-throw switch K4 is connected to the movable terminal K4-3; The transistors of the switch tube group S5, the switch tube group S6, the switch tube group S7, and the switch tube group S8 are controlled to be locked, and the transistors of the switch tube group S1, the switch tube group S2, the switch tube group S3, and the switch tube group S4 are controlled to be switched on and off according to a predetermined frequency.

7. The method according to claim 3, characterized in that: When the input power source is a DC power source and the load is an AC load, the method includes: The fixed terminal K1-1 of the single-pole double-throw switch K1 is connected to the movable terminal K1-2, the fixed terminal K2-1 of the single-pole double-throw switch K2 is connected to the movable terminal K2-3, the fixed terminal K3-1 of the single-pole double-throw switch K3 is connected to the movable terminal K3-3, and the fixed terminal K4-1 of the single-pole double-throw switch K4 is connected to the movable terminal K4-2; The transistors of the switch tube group S1, the switch tube group S2, the switch tube group S3, and the switch tube group S4 are controlled to be locked, and the transistors of the switch tube group S5, the switch tube group S6, the switch tube group S7, and the switch tube group S8 are controlled to be switched on and off according to a predetermined frequency.

8. The method according to claim 3, characterized in that: When the input power source is an AC power source and the load is an AC load, the method includes: The fixed terminal K1-1 of the single-pole double-throw switch K1 is connected to the movable terminal K1-3, the fixed terminal K2-1 of the single-pole double-throw switch K2 is connected to the movable terminal K2-2, the fixed terminal K3-1 of the single-pole double-throw switch K3 is connected to the movable terminal K3-3, and the fixed terminal K4-1 of the single-pole double-throw switch K4 is connected to the movable terminal K4-2; The transistors of the switch tube group S1, the switch tube group S2, the switch tube group S3, the switch tube group S4, the switch tube group S5, the switch tube group S6, the switch tube group S7 and the switch tube group S8 are controlled to be turned on and off according to a predetermined frequency.

9. The method according to claim 3, characterized in that: In the case where the input power source is a DC power source, the load is an AC load, and the voltage required by the load needs to be boosted, the method includes: The fixed terminal K1-1 of the single-pole double-throw switch K1 is connected to the movable terminal K1-3, the fixed terminal K2-1 of the single-pole double-throw switch K2 is connected to the movable terminal K2-3, the fixed terminal K3-1 of the single-pole double-throw switch K3 is connected to the movable terminal K3-3, and the fixed terminal K4-1 of the single-pole double-throw switch K4 is connected to the movable terminal K4-2; The transistors of the switch tube group S1, the switch tube group S3, and the switch tube group S4 are controlled to be locked, and the transistors of the switch tube group S2, the switch tube group S5, the switch tube group S6, the switch tube group S7, and the switch tube group S8 are controlled to be turned on and off according to a predetermined frequency.

10. The method according to any one of claims 3 to 9, characterized in that: The method further comprises: Performing current sampling and voltage sampling on the configurable input interface and the configurable output interface; Parameters of the input power supply and parameters of the load are determined according to the current sampling and the voltage sampling.

11. A power conversion device, characterized in that: include: At least one processor, at least one memory and computer program instructions stored in the memory, when the computer program instructions are executed by the processor, implement the method according to any one of claims 3 to 10.

12. A computer-readable storage medium having computer program instructions stored thereon, characterized in that: When the computer program instructions are executed by a processor, the method according to any one of claims 3 to 10 is implemented.

Images