Converter system compatible with different loads, its control method, and power grid

Abstract

The present invention discloses a converter system compatible with different loads, its control method, and a power grid. Among them, the system includes: a power supply for supplying power to the load; a power converter located between the power supply and the load, including two conversion circuits: a first conversion circuit for converting the power supply into an AC output; and a second conversion circuit for converting the power supply into a DC output; a control switching device located between the power supply and the power converter for controlling the system to switch to the conversion circuit corresponding to the type of the load; wherein the type of the load is a DC load and / or an AC load. The present invention solves the problem that the converter in the prior art is incompatible with different types of loads, and improves the compatibility and intelligence of the converter system.

Description

Technical Field

[0001] The present invention relates to the technical field of converters, and in particular, to a converter system compatible with different loads, its control method, and a power grid. Background Art

[0002] In real life, the energy generated by photovoltaic power generation cannot be directly applied, and a converter is often required to adjust the photovoltaic power. There are various loads in life, which can be divided into DC loads and AC loads according to different power supply methods. Most of the current converters are for single-type loads, either AC loads or DC loads. The converter cannot be used for multiple different types of loads. When the load includes multiple types of loads, the converter cannot be used or multiple converters are required, and the existing converters have insufficient intelligence.

[0003] Regarding the problem that the converter in the related art is not compatible with different types of loads, no effective solution has been proposed yet. Summary of the Invention

[0004] The present invention provides a converter system compatible with different loads, its control method, and a power grid to at least solve the problem that the converter in the prior art is not compatible with different types of loads.

[0005] To solve the above technical problem, according to one aspect of the embodiments of the present invention, a converter system compatible with different loads is provided, including: a power source for supplying power to a load; a power converter located between the power source and the load, including two conversion circuits: a first conversion circuit for converting the power source into an AC output; and a second conversion circuit for converting the power source into a DC output; a control switching device located between the power source and the power converter for controlling the system to switch to the conversion circuit corresponding to the type of the load; wherein the type of the load is a DC load and / or an AC load.

[0006] Further, the power source is a DC power source, and the DC power source includes at least one of the following: a photovoltaic power generation device, a wind power generation device.

[0007] Further, the control switching device includes: a switching circuit located between the power source and the power converter for connecting the power source to the first conversion circuit and / or the power source to the second conversion circuit; a controller connected to the switching circuit for controlling the system to switch to the conversion circuit corresponding to the type of the load through the switching circuit.

[0008] Further, the switching circuit includes: a first switching circuit, located between the power supply and the first conversion circuit, which is closed when the load includes an AC load to supply power to the AC load through the power supply; a second switching circuit, located between the power supply and the second conversion circuit, which is closed when the load includes a DC load to supply power to the DC load through the power supply.

[0009] Further, it further includes: a power grid system; the power grid system includes: a power grid, located between the first conversion circuit and the load, which is used to receive the AC output of the first conversion circuit, or supply power to the AC load when the load includes an AC load.

[0010] Further, the power grid system further includes: a third switching circuit, located between the first conversion circuit and the power grid, which is closed when the output power of the power supply is greater than the power consumption of the load to incorporate the excess electric energy of the power supply other than the load consumption into the power grid; a fourth switching circuit, located between the power grid and the load, which is closed when the load includes an AC load and the output power of the power supply is less than the power consumption of the load to supply power to the AC load through the power grid.

[0011] Further, it further includes: an energy storage system; the energy storage system includes: an energy storage device, located between the second conversion circuit and the load, which is used to receive and store the DC output of the second conversion circuit, or supply power to the DC load when the load includes a DC load.

[0012] Further, the energy storage system further includes: a fifth switching circuit, located between the second conversion circuit and the energy storage device, which is closed when the output power of the power supply is greater than the power consumption of the load to store the excess electric energy of the power supply other than the load consumption; a sixth switching circuit, located between the energy storage device and the load, which is closed when the load includes a DC load and the output power of the power supply is less than the power consumption of the load to supply power to the DC load through the energy storage device.

[0013] Further, it further includes: a seventh switching circuit, located between the energy storage device and the power grid, which is used to control the power grid to charge the energy storage device.

[0014] Further, it further includes: an output control device, with an input end connected to the power grid, the energy storage device, and the power converter, and an output end connected to the load, which is used to adjust the electric energy input from the power grid, and / or, the energy storage device, and / or, the power converter to supply power to the load.

[0015] Further, the output control device includes: a control device and a load access device connected in sequence; wherein, the control device is used to adjust the electric energy input from the power grid, and / or, the energy storage device, and / or, the power converter; the load access device is used to supply the electric energy adjusted by the control device to the load to supply power to the load.

[0016] Further, the control device includes: a voltage adjustment module, one end of which is connected to the input end of the control device and the other end is connected to the load access device, and is used for adjusting the voltage of the input electric energy to adapt to the voltage of the load.

[0017] Further, the control device further includes: an output monitoring module, one end of which is connected to the input end of the control device and the other end is connected to the load access device, and is used for monitoring the output parameters of the output control device in real time; an indication module, one end of which is connected to the input end of the control device and the other end is connected to the load access device, and is used for displaying the working condition of the output control device.

[0018] Further, it further includes: a human-machine interaction device, connected to the output monitoring module, and is used for receiving the output parameters monitored by the output monitoring module and displaying them to the user, and receiving the control parameters input by the user.

[0019] Further, the human-machine interaction device is also connected to the controller, and is used for determining the type of the load and sending the type of the load to the controller.

[0020] Further, the human-machine interaction interface determines the type of the load by receiving the load parameters input by the user, or determines the type of the load by providing the user with options of the type of the load and identifying the options selected by the user.

[0021] Further, it further includes: a filtering device, located between the power supply and the control switching device, and is used for filtering the output of the power supply.

[0022] According to another aspect of the embodiments of the present invention, there is provided a control method for a converter system compatible with different loads, applied to the system as described above, including: determining the type of the load, and determining the corresponding power conversion circuit according to the type of the load; wherein, the type of the load is a DC load, and / or, an AC load; the control system switches to the power conversion circuit corresponding to the type of the load to supply power to the load through the power supply.

[0023] Further, determining the type of the load includes: determining the type of the load by receiving the load parameters input by the user through the human-machine interaction device; or determining the type of the load by providing the user with options of the type of the load and identifying the options selected by the user.

[0024] Further, determining the corresponding power conversion circuit according to the type of the load includes: when the type of the load only includes an AC load, determining the corresponding power conversion circuit as the first conversion circuit; when the type of the load only includes a DC load, determining the corresponding power conversion circuit as the second conversion circuit; when the type of the load includes an AC load and a DC load, determining the corresponding power conversion circuit as the first conversion circuit and the second conversion circuit.

[0025] Further, the control system switches to the power conversion circuit corresponding to the type of the load, including: when the type of the load only includes AC loads, controlling the first switch circuit to close; wherein, the first switch circuit is located between the power supply and the first conversion circuit; when the type of the load only includes DC loads, controlling the second switch circuit to close; wherein, the second switch circuit is located between the power supply and the second conversion circuit; when the type of the load includes AC loads and DC loads, controlling the first switch circuit and the second switch circuit to close.

[0026] Further, after powering the load, it further includes: detecting the output power of the power supply and the consumed power of the load; when the output power of the power supply is greater than the consumed power of the load, controlling the third switch circuit to close to incorporate the redundant electric energy of the power supply except for the load consumption into the power grid, and / or, controlling the fifth switch circuit to close to store the redundant electric energy of the power supply except for the load consumption into the energy storage device; wherein, the third switch circuit is located between the first conversion circuit and the power grid; the fifth switch circuit is located between the second conversion circuit and the energy storage device; when the output power of the power supply is less than the consumed power of the load, executing a corresponding control strategy according to the type of the load.

[0027] Further, executing a corresponding control strategy according to the type of the load includes: when the type of the load only includes AC loads, controlling the fourth switch circuit to close to supply power to the AC load through the power grid; wherein, the fourth switch circuit is located between the power grid and the load; when the type of the load only includes DC loads, controlling the sixth switch circuit to close to supply power to the DC load through the energy storage device; wherein, the sixth switch circuit is located between the energy storage device and the load; when the type of the load includes AC loads and DC loads, controlling the fourth switch circuit and the sixth switch circuit to close to supply power to the AC load through the power grid, and, supply power to the DC load through the energy storage device.

[0028] Further, executing a corresponding control strategy according to the type of the load further includes: when the type of the load only includes DC loads, or, the type of the load includes AC loads and DC loads, and the power supply cannot charge the energy storage device, controlling the seventh switch circuit to close to charge the energy storage device through the power grid; wherein, the seventh switch circuit is located between the energy storage device and the power grid.

[0029] According to another aspect of the embodiments of the present invention, a power grid is provided, including the converter system compatible with different loads as described above.

[0030] According to another aspect of the embodiments of the present invention, a computer device is provided, including a memory, a processor, and a computer program stored on the memory and executable on the processor, and when the processor executes the program, it implements the control method of the converter system compatible with different loads as described above.

[0031] According to another aspect of the embodiments of the present invention, there is provided a storage medium containing computer-executable instructions, which are used to execute the control method of the converter system compatible with different loads as described above when executed by a computer processor.

[0032] In the present invention, a converter system compatible with different loads is provided, which switches the power conversion circuit according to the type of the load to provide electrical energy corresponding to the type of the load for different types of loads, so that the system can supply power to different types of loads compatibly, thus effectively solving the problem that the converter in the prior art is incompatible with different types of loads and improving the compatibility and intelligence of the converter system. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is an alternative structural block diagram of the converter system compatible with different loads according to Embodiment 1 of the present invention;

[0034] Figure 2 is another alternative structural block diagram of the converter system compatible with different loads according to Embodiment 1 of the present invention;

[0035] Figure 3 is an alternative structural block diagram of the output control device according to Embodiment 1 of the present invention; and

[0036] Figure 4 is an alternative flowchart of the control method of the converter system compatible with different loads according to Embodiment 2 of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0038] Embodiment 1

[0039] In the preferred Embodiment 1 of the present invention, a converter system compatible with different loads is provided. Specifically, Figure 1 An alternative structural block diagram showing the method is as Figure 1 shown, and the system includes:

[0040] A power supply 102 for supplying power to a load 104;

[0041] A power converter 106, located between a power source 102 and a load 104, includes two conversion circuits: a first conversion circuit for converting the power source into an AC output; and a second conversion circuit for converting the power source into a DC output.

[0042] A control switching device 108, located between the power source 102 and the power converter 106, is used to control the system to switch to the conversion circuit corresponding to the type of the load; wherein, the type of the load is a DC load and / or an AC load.

[0043] In the above embodiment, a converter system compatible with different loads is provided. The power conversion circuit is switched according to the type of the load to provide electrical energy corresponding to the type of the load for different types of loads, so that the system can supply power to different types of loads compatibly, thus effectively solving the problem that the converter in the prior art is incompatible with different types of loads, and improving the compatibility and intelligence of the converter system.

[0044] In the present invention, the power source is a DC power source, and the DC power source includes at least one of the following: a photovoltaic power generation device, a wind power generation device.

[0045] Taking the power source as a photovoltaic power generation device as an example below, the converter system compatible with different loads in the present invention is explained in detail. The structural block diagram of the system is as Figure 2 shown.

[0046] In a preferred embodiment of the present invention, the control switching device includes: a switching circuit, located between the power source and the power converter, for connecting the power source to the first conversion circuit, i.e., a DC / AC converter, and / or the power source to the second conversion circuit, a DC / DC converter; a controller, connected to the switching circuit, for controlling the system to switch to the conversion circuit corresponding to the type of the load through the switching circuit. Further, the switching circuit includes: a first switch circuit, such as Figure 2 S1 in, located between the power source and the first conversion circuit, for closing when the load includes an AC load to supply power to the AC load through the power source; a second switch circuit, such as Figure 2 S2 in, located between the power source and the second conversion circuit, for closing when the load includes a DC load to supply power to the DC load through the power source. In the above embodiment, the load including an AC load includes the following situations: the load is an AC load, or the load is an AC load and a DC load. That is, the load including an AC load can include two situations. Similarly, the load including a DC load also includes the following situations: the load is a DC load, or the load is an AC load and a DC load.

[0047] In another preferred embodiment of the present invention, the system further includes: a power grid system; the power grid system includes: a power grid located between the first conversion circuit and the load, for receiving the AC output of the first conversion circuit, or for supplying power to an AC load when the load includes an AC load. Preferably, the power grid system further includes: a third switch circuit S3 located between the first conversion circuit and the power grid, for closing when the output power of the power supply is greater than the consumption power of the load, so as to incorporate the excess electric energy of the power supply except for the load consumption into the power grid; a fourth switch circuit S4 located between the power grid and the load, for closing when the load includes an AC load and the output power of the power supply is less than the consumption power of the load, so as to supply power to the AC load through the power grid.

[0048] Furthermore, it further includes: an energy storage system; the energy storage system includes: an energy storage device located between the second conversion circuit and the load, for receiving and storing the DC output of the second conversion circuit, or for supplying power to a DC load when the load includes a DC load. The energy storage system further includes: a fifth switch circuit located between the second conversion circuit and the energy storage device, for closing when the output power of the power supply is greater than the consumption power of the load, so as to store the excess electric energy of the power supply except for the load consumption; a sixth switch circuit located between the energy storage device and the load, for closing when the load includes a DC load and the output power of the power supply is less than the consumption power of the load, so as to supply power to the DC load through the energy storage device.

[0049] That is, in the present invention, not only can the power supply supply power to the load, but also considering that the load of the power supply may be insufficient to supply power to the load and exceed the load demand, for the situation where the load of the power grid is insufficient to supply power to the load, other power forms are adopted, including the power grid (corresponding to AC loads) and the energy storage device (corresponding to DC loads), to provide backup electric energy for different types of loads. And for the situation where the power supply exceeds the load demand, the converters in the prior art cannot utilize the excess electric energy except for the load consumption, resulting in low energy utilization efficiency. To improve the energy utilization efficiency, the present invention also recovers the excess electric energy through the power grid and the energy storage device to achieve intelligent energy management of the converter.

[0050] Moreover, when the output end is no-load, the system will default to S1 open and S2 closed to charge the energy storage device. After the charging is completed, S2 is disconnected and S1 is closed to incorporate the excess generated power into the power grid.

[0051] Optionally, the system further includes: a seventh switch circuit S7 located between the energy storage device and the power grid, for controlling the power grid to charge the energy storage device. When the power of the energy storage device is insufficient and the photovoltaic power generation cannot charge it, the controller will turn on S7, and the power grid will charge the energy storage device.

[0052] S1 to S7 are switching devices such as switching tubes, analog switches or contactors.

[0053] In another preferred embodiment of the present invention, the system further includes: an output control device, with its input end connected to the power grid, the energy storage device, and the power converter, and its output end connected to the load, for regulating the electric energy input from the power grid, and / or, the energy storage device, and / or, the power converter to supply power to the load. As described above, the power grid and the energy storage device can provide auxiliary power supply when the power source is insufficient to supply power to the load. Therefore, the input end of the output control device is connected to the power grid, the energy storage device, and the power converter. Figure 3 Fig. shows an optional structural block diagram of the output control device.

[0054] As Figure 3 shown, the output control device includes: a control device and a load access device connected in sequence; wherein, the control device is used for regulating the electric energy input from the power grid, and / or, the energy storage device, and / or, the power converter; the load access device is used for supplying the electric energy regulated by the control device to the load to supply power to the load. The control device includes: a voltage adjustment module, with one end connected to the input end of the control device and the other end connected to the load access device, for regulating the voltage of the input electric energy to adapt to the voltage of the load. An output monitoring module, with one end connected to the input end of the control device and the other end connected to the load access device, for real-time monitoring of the output parameters of the output control device; an indication module, with one end connected to the input end of the control device and the other end connected to the load access device, for displaying the working condition of the output control device. The load access is composed of a multi-channel analog switch, which can access multiple loads (including the same type of load or different types of loads) simultaneously, supply power to the load through the load switching module, display the working condition of the output end by the indication module, and at the same time, the output monitoring module will real-time monitor parameters such as output voltage, current, and power.

[0055] Preferably, the system further includes: a human-machine interaction device, connected to the output monitoring module, for receiving the output parameters monitored by the output monitoring module and displaying them to the user, and receiving the control parameters input by the user. The output monitoring module will real-time monitor parameters such as output voltage, current, and power, and transmit the data to the human-machine interaction device, improving the human-machine interaction effect of the entire converter. During the operation of the entire intelligent converter system, the working status data will be fed back to the human-machine interaction device by the controller according to the user's needs through communication. The user can view the relevant working data and set the status of the converter, including output voltage, maximum output power limit, etc., to achieve human-machine interaction operation. The human-machine interaction device can be a display screen, APP, or web page, etc. The controller and the human-machine interaction device are connected by wired or wireless communication methods.

[0056] Meanwhile, the human-machine interaction device is also connected to the controller, which is used to determine the type of the load and send the type of the load to the controller. Among them, the human-machine interaction interface determines the type of the load by receiving the load parameters input by the user, or by providing options of the type of the load to the user and identifying the selected option by the user to determine the type of the load.

[0057] When a load is connected to the output terminal, the user sets the power supply type and voltage of the load in the human-machine interaction device, and transmits them to the controller through a communication (wired communication or wireless communication) device. The controller will switch the on / off states of switches S1 and S2 according to the user's instructions (S1 is on and S2 is off for an AC load, and S1 is off and S2 is on for a DC load), perform corresponding DC / AC or DC / DC conversion, and use the voltage at the output terminal to configure the corresponding power supply voltage for the load. The load is powered through the load switching module, and the working condition of the output terminal is displayed by the indication module. At the same time, the output monitoring module will monitor parameters such as the output voltage, current, and power in real time and transmit the data to the human-machine interaction device.

[0058] Furthermore, the system further includes: a filtering device, which is located between the power supply and the control switching device and is used to filter the output of the power supply.

[0059] From the above content, it can be seen that the present system realizes the compatible power supply of the inverter for different types of loads, supports multiple outputs, performs energy management on the input photovoltaic power, and realizes the intelligent interaction between the user and the inverter, improving the user experience and usage effect.

[0060] Embodiment 2

[0061] In a preferred Embodiment 2 of the present invention, a control method for an inverter system compatible with different loads is further provided, which is applied to the system as described in Embodiment 1 above. Specifically, Figure 4 An optional flowchart showing the method is as Figure 4 shown. The method includes the following steps S402 - S404:

[0062] S402: Determine the type of the load, and determine the corresponding power conversion circuit according to the type of the load; wherein, the type of the load is a DC load and / or an AC load;

[0063] S404: Control the system to switch to the power conversion circuit corresponding to the type of the load to supply power to the load through the power supply.

[0064] In the above embodiment, a control method for a converter system compatible with different loads is provided. The power conversion circuit is switched according to the type of load to provide electrical energy corresponding to the type of different loads, so that the system can supply power to different types of loads compatibly, thus effectively solving the problem that the converter in the prior art is incompatible with different types of loads and improving the compatibility and intelligence of the converter system.

[0065] In a preferred embodiment of the present invention, determining the type of load includes: determining the type of load by receiving load parameters input by the user through a man-machine interaction device; or, providing options of the type of load to the user and identifying the options selected by the user to determine the type of load.

[0066] Preferably, determining the corresponding power conversion circuit according to the type of load includes: when the type of load only includes AC loads, determining the corresponding power conversion circuit as the first conversion circuit; when the type of load only includes DC loads, determining the corresponding power conversion circuit as the second conversion circuit; when the type of load includes both AC loads and DC loads, determining the corresponding power conversion circuits as the first conversion circuit and the second conversion circuit.

[0067] Further, controlling the system to switch to the power conversion circuit corresponding to the type of load includes: when the type of load only includes AC loads, controlling the first switch circuit to close; wherein, the first switch circuit is located between the power supply and the first conversion circuit; when the type of load only includes DC loads, controlling the second switch circuit to close; wherein, the second switch circuit is located between the power supply and the second conversion circuit; when the type of load includes both AC loads and DC loads, controlling the first switch circuit and the second switch circuit to close.

[0068] In another preferred embodiment of the present invention, after supplying power to the load, it further includes: detecting the output power of the power supply and the consumption power of the load; when the output power of the power supply is greater than the consumption power of the load, controlling the third switch circuit to close to incorporate the redundant electrical energy of the power supply other than the load consumption into the power grid, and / or, controlling the fifth switch circuit to close to store the redundant electrical energy of the power supply other than the load consumption in the energy storage device; wherein, the third switch circuit is located between the first conversion circuit and the power grid; the fifth switch circuit is located between the second conversion circuit and the energy storage device; when the output power of the power supply is less than the consumption power of the load, executing corresponding control strategies according to the type of load.

[0069] Among them, corresponding control strategies are executed according to the type of load, including: when the type of load only includes AC loads, controlling the fourth switch circuit to close to supply power to the AC loads through the power grid; wherein, the fourth switch circuit is located between the power grid and the load; when the type of load only includes DC loads, controlling the sixth switch circuit to close to supply power to the DC loads through the energy storage device; wherein, the sixth switch circuit is located between the energy storage device and the load; when the type of load includes AC loads and DC loads, controlling the fourth switch circuit and the sixth switch circuit to close to supply power to the AC loads through the power grid and supply power to the DC loads through the energy storage device.

[0070] Optionally, executing corresponding control strategies according to the type of load further includes: when the type of load only includes DC loads, or when the type of load includes AC loads and DC loads and the power supply cannot charge the energy storage device, controlling the seventh switch circuit to close to charge the energy storage device through the power grid; wherein, the seventh switch circuit is located between the energy storage device and the power grid.

[0071] Through the above method, the converter realizes compatible power supply for different types of loads, supports multiple outputs, performs energy management on the input photovoltaic power, and realizes intelligent interaction between the user and the converter, improving the user experience and usage effect.

[0072] Embodiment 3

[0073] Based on the converter system compatible with different loads provided in the above Embodiment 1, in the preferred Embodiment 3 of the present invention, a power grid is further provided, including the converter system compatible with different loads as described in the above Embodiment 1.

[0074] In the above embodiment, a converter system compatible with different loads is provided, which switches the power conversion circuit according to the type of load to provide electrical energy corresponding to the type for different types of loads, enabling the system to provide compatible power supply for different types of loads, thereby effectively solving the problem that the converter in the prior art is incompatible with different types of loads and improving the compatibility and intelligence of the converter system.

[0075] Embodiment 4

[0076] Based on the control method of the converter system compatible with different loads provided in the above Embodiment 1, in the preferred Embodiment 4 of the present invention, a computer device is further provided, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the above method is implemented.

[0077] In the above embodiment, a control method for a converter system compatible with different loads is provided. The power conversion circuit is switched according to the type of load to provide electrical energy corresponding to the type of different loads, so that the system can supply power to different types of loads compatibly, thereby effectively solving the problem that the converter in the prior art is incompatible with different types of loads, and improving the compatibility and intelligence of the converter system.

[0078] Embodiment 5

[0079] Based on the control method for a converter system compatible with different loads provided in the above Embodiment 1, in the preferred Embodiment 5 of the present invention, a storage medium containing computer-executable instructions is further provided. The computer-executable instructions are used to execute the method as described above when executed by a computer processor.

[0080] In the above embodiment, a control method for a converter system compatible with different loads is provided. The power conversion circuit is switched according to the type of load to provide electrical energy corresponding to the type of different loads, so that the system can supply power to different types of loads compatibly, thereby effectively solving the problem that the converter in the prior art is incompatible with different types of loads, and improving the compatibility and intelligence of the converter system.

[0081] Those skilled in the art will readily think of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention, which follow the general principles of the present invention and include known common knowledge or conventional technical means in the technical field not invented by the present invention. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present invention are pointed out by the following claims.

[0082] It should be understood that the present invention is not limited to the exact structure already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A converter system compatible with different loads, characterized in that, Comprising: A power supply for powering a load; A power converter located between the power supply and the load, including two conversion circuits: a first conversion circuit for converting the power supply into an AC output; And a second conversion circuit for converting the power supply into a DC output; A control switching device located between the power supply and the power converter for controlling the system to switch to the conversion circuit corresponding to the type of the load; wherein the type of the load is a DC load and / or an AC load; A power grid system; the power grid system includes: a power grid located between the first conversion circuit and the load for receiving the AC output of the first conversion circuit when the output power of the power supply is greater than the power consumption of the load, or for powering the AC load when the load includes an AC load and the output power of the power supply is less than the power consumption of the load; An energy storage system; the energy storage system includes: an energy storage device located between the second conversion circuit and the load for receiving and storing the DC output of the second conversion circuit when the output power of the power supply is greater than the power consumption of the load, or for powering the DC load when the load includes a DC load and the output power of the power supply is less than the power consumption of the load; Wherein, when the load is connected to the output end of the system, the type and supply voltage of the load are obtained, the control switching device controls the power converter to switch to the conversion circuit corresponding to the type of the load, adjusts the voltage at the output end to the supply voltage of the load, powers the load, and monitors the output parameters at the output end in real time.

2. The system according to claim 1, wherein The power supply is a DC power supply, and the DC power supply includes at least one of the following: a photovoltaic power generation device, a wind power generation device.

3. The system according to claim 1, wherein The control switching device includes: A switching circuit located between the power supply and the power converter for connecting the power supply to the first conversion circuit and / or the power supply to the second conversion circuit; A controller connected to the switching circuit for controlling the system to switch to the conversion circuit corresponding to the type of the load through the switching circuit.

4. The system according to claim 3, wherein The switching circuit includes: A first switch circuit located between the power supply and the first conversion circuit for closing when the load includes an AC load to power the AC load through the power supply; A second switch circuit located between the power supply and the second conversion circuit for closing when the load includes a DC load to power the DC load through the power supply.

5. The system according to claim 1, characterized in that, The power grid system further includes: A third switch circuit located between the first conversion circuit and the power grid for closing when the output power of the power supply is greater than the power consumption of the load to incorporate the excess electric energy other than the load consumption of the power supply into the power grid; A fourth switch circuit located between the power grid and the load for closing when the load includes an AC load and the output power of the power supply is less than the power consumption of the load to power the AC load through the power grid.

6. The system according to claim 1, wherein The energy storage system further includes: The fifth switching circuit, located between the second conversion circuit and the energy storage device, is used to close when the output power of the power supply is greater than the consumption power of the load, so as to store the excess electric energy of the power supply except for the consumption of the load. The sixth switching circuit, located between the energy storage device and the load, is used to close when the load includes a DC load and the output power of the power supply is less than the consumption power of the load, so as to supply power to the DC load through the energy storage device.

7. The system according to claim 1, wherein It further includes: The seventh switching circuit, located between the energy storage device and the power grid, is used to control the power grid to charge the energy storage device.

8. The system according to claim 3, wherein It further includes: The output control device, with its input end connected to the power grid, the energy storage device and the power converter, and its output end connected to the load, is used to adjust the electric energy input by the power grid, and / or, the energy storage device, and / or, the power converter to supply power to the load.

9. The system according to claim 8, wherein The output control device includes: a control device and a load access device connected in sequence; wherein, The control device is used to adjust the electric energy input by the power grid, and / or, the energy storage device, and / or, the power converter. The load access device is used to provide the electric energy adjusted by the control device to the load to supply power to the load.

10. The system according to claim 9, wherein The control device includes: The voltage adjustment module, with one end connected to the input end of the control device and the other end connected to the load access device, is used to adjust the voltage of the input electric energy to adapt to the voltage of the load.

11. The system according to claim 10, wherein The control device further includes: The output monitoring module, with one end connected to the input end of the control device and the other end connected to the load access device, is used to monitor the output parameters of the output control device in real time. The indication module, with one end connected to the input end of the control device and the other end connected to the load access device, is used to display the working condition of the output control device.

12. The system according to claim 11, wherein, It further includes: The human-machine interaction device, connected to the output monitoring module, is used to receive the output parameters monitored by the output monitoring module and display them to the user, and receive the control parameters input by the user.

13. The system according to claim 12, wherein, The human-machine interaction device is further connected to the controller and is used to determine the type of the load and send the type of the load to the controller.

14. The system according to claim 13, wherein The human-machine interaction interface determines the type of the load by receiving the load parameters input by the user, or, by providing the options of the type of the load to the user and identifying the options selected by the user.

15. The system according to claim 1, wherein It further includes: The filtering device, located between the power supply and the control switching device, is used to filter the output of the power supply.

16. A control method for a converter system compatible with different loads, applied to the system according to any one of claims 1-15, characterized in that, It includes: Determine the type of the load, and determine the corresponding power conversion circuit according to the type of the load; wherein, the type of the load is a DC load, and / or, an AC load. The control system switches to the power conversion circuit corresponding to the type of the load to supply power to the load through the power supply.

17. The method according to claim 16, wherein Determining the type of the load includes: Receive the load parameters input by the user through the human-machine interaction device to determine the type of the load; or, provide the user with options for the type of the load and identify the option selected by the user to determine the type of the load.

18. The method according to claim 16, wherein Determine the corresponding power conversion circuit according to the type of the load, including: When the type of the load only includes AC loads, determine that the corresponding power conversion circuit is the first conversion circuit; When the type of the load only includes DC loads, determine that the corresponding power conversion circuit is the second conversion circuit; When the type of the load includes both AC loads and DC loads, determine that the corresponding power conversion circuits are the first conversion circuit and the second conversion circuit.

19. The method according to claim 18, characterized in that, Control the system to switch to the power conversion circuit corresponding to the type of the load, including: When the type of the load only includes AC loads, control the first switch circuit to close; wherein, the first switch circuit is located between the power supply and the first conversion circuit; When the type of the load only includes DC loads, control the second switch circuit to close; wherein, the second switch circuit is located between the power supply and the second conversion circuit; when the type of the load includes both AC loads and DC loads, control the first switch circuit and the second switch circuit to close.

20. The method according to claim 16, wherein After powering the load, it further includes: Detect the output power of the power supply and the consumption power of the load; When the output power of the power supply is greater than the consumption power of the load, control the third switch circuit to close to incorporate the redundant electric energy other than the load consumption of the power supply into the power grid, and / or, control the fifth switch circuit to close to store the redundant electric energy other than the load consumption of the power supply into the energy storage device; wherein, the third switch circuit is located between the first conversion circuit and the power grid; the fifth switch circuit is located between the second conversion circuit and the energy storage device; When the output power of the power supply is less than the consumption power of the load, execute the corresponding control strategy according to the type of the load.

21. The method according to claim 20, wherein Execute the corresponding control strategy according to the type of the load, including: When the type of the load only includes AC loads, control the fourth switch circuit to close to supply power to the AC load through the power grid; wherein, the fourth switch circuit is located between the power grid and the load; When the type of the load only includes DC loads, control the sixth switch circuit to close to supply power to the DC load through the energy storage device; wherein, the sixth switch circuit is located between the energy storage device and the load; When the type of the load includes both AC loads and DC loads, control the fourth switch circuit and the sixth switch circuit to close to supply power to the AC load through the power grid and supply power to the DC load through the energy storage device.

22. The method according to claim 21, wherein Execute the corresponding control strategy according to the type of the load, and it further includes: When the type of the load only includes DC loads, or when the type of the load includes AC loads and DC loads and the power supply cannot charge the energy storage device, control the seventh switching circuit to close so as to charge the energy storage device through the power grid; wherein, the seventh switching circuit is located between the energy storage device and the power grid.

23. A power grid, characterized in that, Comprising a converter system compatible with different loads according to any one of claims 1-15.

24. A computer device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the control method of the converter system compatible with different loads according to any one of claims 16 to 22.

25. A storage medium containing computer-executable instructions, which are used to execute the control method of the converter system compatible with different loads according to any one of claims 16 to 22 when executed by a computer processor.

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