Backflow control device, method and storage medium for inverter power supply equipment

Abstract

The present invention provides a backfeed control device, method and storage medium for an inverter device. The backfeed control device is connected to the output circuit of the inverter device; the output circuit is used to connect an electrical load; the backfeed control device includes: a power sensor, a control device and a backfeed energy discharge device; the power sensor is used to detect the power data of the output circuit of the inverter device; the control device is respectively connected to the power sensor and the backfeed energy discharge device, and is used to receive the power data detected by the power sensor, and control the backfeed energy discharge device to connect or exit the output circuit of the inverter device according to the power data. The control process of the backfeed control device provided by the present invention is simple and fast, the connection of the backfeed control device will not destroy the original internal circuit composition of the inverter device, and the backfeed control device has a simple structure and low cost.

Description

Technical Field

[0001] The present invention relates to the technical field of inverter power supply equipment, and in particular to a backfeed control device, method and storage medium for inverter power supply equipment. Background Art

[0002] At present, it is common for power supply equipment to have energy backflow. For DC power supply equipment, since its output is direct current, adding an anti-reverse diode to the output circuit can prevent energy backflow, which is simple and practical to operate. However, for inverter power supply equipment, its output is alternating current, and the current is positive and negative during normal output. It is no longer possible to simply add an anti-reverse diode to the output circuit to prevent energy backflow. For power supply equipment with a busbar, such as UPS, when energy backflow occurs, the backflow energy will be reflected on the busbar through the body diode of the inverter circuit switching device. Therefore, existing inverter power supply equipment usually sets a corresponding energy backflow circuit on the busbar side inside the equipment, but this method must be set during the product production stage, or it needs to destroy the internal structure of the equipment, and it cannot be flexibly added without destroying the internal structure of the equipment during use. Summary of the invention

[0003] The embodiment of the present invention provides a backfeed control device, method and storage medium for an inverter power supply device to solve the problem of complex structure of a backfeed prevention circuit.

[0004] In a first aspect, an embodiment of the present invention provides a backfeed control device for an inverter power supply device, wherein the backfeed control device is connected to an output circuit of the inverter power supply device; the output circuit is used to connect an electrical load; the backfeed control device includes: a power sensor, a control device, and a backfeed energy discharge device;

[0005] The power sensor is used to detect power data of the output circuit of the inverter power supply device;

[0006] The control device is connected to the power sensor and the backfeed energy discharge device respectively, and is used to receive power data detected by the power sensor, and control the backfeed energy discharge device to access or exit the output circuit of the inverter device according to the power data.

[0007] In a possible implementation, the backflow energy release device includes one or more adjustable dummy loads, and / or one or more fixed-value dummy loads; wherein the adjustable dummy load includes one or more of an inductive load element, a resistive load element, and a capacitive load element.

[0008] In a second aspect, an embodiment of the present invention provides a backfeed control method for an inverter power supply device, wherein an output circuit of the inverter power supply device is provided with the above-mentioned backfeed control device; the backfeed control method comprises:

[0009] Obtain power data of the output circuit;

[0010] When it is determined according to the power data that there is backfeed energy in the output circuit, the backfeed energy discharge device is controlled to be connected to the output circuit; or when it is determined according to the power data that there is no backfeed energy in the output circuit, the backfeed energy discharge device is controlled to exit the output circuit.

[0011] In a possible implementation manner, determining, according to the power data, whether there is backfeed energy in the output circuit includes:

[0012] When the power data is lower than a first preset power value, it is determined that there is backflow energy in the output circuit; wherein the power data includes active power.

[0013] In a possible implementation manner, judging, according to the power data, whether there is no backfeed energy in the output circuit includes:

[0014] When the feedback energy discharge device is connected to the output circuit and the power data is lower than a second preset power value, it is determined that there is no feedback energy on the output circuit; wherein the second preset power value is not lower than the power value of the feedback energy discharge device.

[0015] In a possible implementation manner, before the control backfeed energy release device is connected to the output circuit, the method further includes:

[0016] Determining a target dummy load connected to the output circuit according to the electrical load connected to the output circuit;

[0017] A control strategy for the backflow energy discharge device is determined according to the target dummy load.

[0018] In a possible implementation manner, determining the target dummy load connected to the output circuit according to the power data of the electrical load connected to the output circuit includes:

[0019] A target power value and / or a target resistance value is calculated according to the power of the electrical load.

[0020] In a possible implementation, when the backflow energy discharge device includes one or more fixed-value dummy loads, determining a control strategy for the backflow energy discharge device according to the target dummy load includes:

[0021] The number of fixed-value dummy loads of the backflow energy discharge device connected to the output circuit is determined according to the target dummy load.

[0022] In a possible implementation, when the backflow energy discharging device includes one or more adjustable dummy loads, determining a control strategy for the backflow energy discharging device according to the target dummy load includes:

[0023] The number of adjustable dummy loads and / or the input power of the adjustable dummy loads of the backflow energy discharge device connected to the output circuit is determined according to the target dummy load.

[0024] In a possible implementation, when the backflow energy discharge device includes one or more fixed-value dummy loads and one or more adjustable dummy loads, determining a control strategy for the backflow energy discharge device according to the target dummy load includes:

[0025] The number of fixed-value dummy loads, the number of adjustable dummy loads, and the input power of the adjustable dummy loads of the backflow energy discharge device connected to the output circuit are determined according to the target dummy load.

[0026] In a third aspect, an embodiment of the present invention provides a backflow control device for an inverter power supply device, comprising:

[0027] An acquisition module, used for acquiring power data of an output circuit;

[0028] A judgment module is used to control the feedback energy discharge device to connect to the output circuit when it is judged that there is feedback energy on the output circuit according to the power data, or to control the feedback energy discharge device to exit the output circuit when it is judged that there is no feedback energy on the output circuit according to the power data.

[0029] In a fourth aspect, an embodiment of the present invention provides a terminal, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of the method described in the first aspect or any possible implementation manner of the first aspect are implemented.

[0030] In a fifth aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method described in the first aspect or any possible implementation method of the first aspect are implemented.

[0031] The embodiment of the present invention provides a backfeed control device, method and storage medium for an inverter device, and designs a backfeed control device connected to the output circuit of the inverter device, and the output circuit is used to connect an electrical load. The backfeed control device includes: a power sensor, a control device and a backfeed energy discharge device, and the power sensor is used to detect the power data of the output circuit of the inverter device. The control device is respectively connected to the power sensor and the backfeed energy discharge device, and is used to receive the power data detected by the power sensor, and control the backfeed energy discharge device to access or exit the output circuit of the inverter device according to the power data. The control process of the backfeed control device provided by the embodiment of the present invention is simple and fast, and the access of the backfeed control device will not destroy the original internal circuit composition of the inverter device. The backfeed control device has a simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0033] Figure 1 It is a schematic diagram of connection between an inverter power supply device and a backfeed control device provided by an embodiment of the present invention;

[0034] Figure 2 It is a flow chart of an implementation of a backfeed control method for an inverter power supply device provided by an embodiment of the present invention;

[0035] Figure 3 It is a structural schematic diagram of a backfeed control device for an inverter power supply device provided by an embodiment of the present invention;

[0036] Figure 4 is a schematic diagram of a terminal provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0037] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0038] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0039] Unless otherwise stated, the term "plurality" means two or more.

[0040] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0041] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0042] The solution provided in the embodiment of the present invention is used for anti-backflow control of inverter power supply equipment. In the specific application process, the inverter power supply equipment mainly involves new energy vehicle charging piles and uninterruptible power supplies (UPS) with energy backflow. The embodiment of the present invention is described by taking UPS as an example.

[0043] In order to make the purpose, technical solutions and advantages of the present invention more clear, specific embodiments will be described below in conjunction with the accompanying drawings.

[0044] Figure 1 The schematic diagram of the connection between the inverter power supply device and the backflow control device provided in the embodiment of the present invention. Figure 1 As shown, the backfeed control device 20 is connected to the output circuit of the inverter power supply device 10 .

[0045] In different embodiments, the output circuit of the inverter power supply device 10 has different specific compositions according to the type of the connected electrical load, and the subsequent circuit can be a one-phase circuit, a two-phase circuit, or a three-phase circuit ( Figure 1 The inverter power supply device 10 is shown as a three-phase circuit. The inverter power supply device 10 is taken as an example of UPS. UPS is a system device that connects an energy storage unit (such as a battery) to a host and converts direct current into commercial power through the inverter of the host. It is mainly used to provide a stable and uninterrupted power supply to a single computer, a computer network system or other power equipment such as a solenoid valve, a pressure transmitter and other loads. Corresponding to the inverter power supply device 10, the subsequent electrical load includes a computer, a computer network system, a solenoid valve or a pressure transmitter, etc.

[0046] In addition, the UPS output circuit is connected to another UPS output circuit to achieve parallel operation. UPS parallel operation refers to running two UPS in parallel to jointly power the load to provide a more reliable power supply. However, voltage backflow may occur between the two parallel UPS. For example, in some scenarios, when the output voltage of one UPS is higher than the bus voltage of another UPS in parallel, its output voltage may be backflowed to the bus of the other UPS, causing the bus of the other UPS to increase in current. When the increased current exceeds the upper limit of the inverter switching device of the other UPS, it may cause damage to the inverter of the other UPS. Corresponding to the UPS parallel scenario, the backflow control device 20 is connected to the intersection of two or more UPS output circuits to avoid backflow in any direction between multiple UPS.

[0047] The backfeed control device 20 includes: a power sensor 201 , a control device 202 and a backfeed energy release device 203 .

[0048] The power sensor 201 is used to detect the power data of the output circuit of the inverter device. When the subsequent output circuit corresponding to the output circuit of the inverter device is complex, for example, including multiple loads, the power data corresponds to the total power data of the multiple loads of the subsequent output circuit.

[0049] The power sensor 201 directly samples the power data and transmits it to the control device 202, so that the control device 202 can determine whether there is backflow energy based on the power data, thereby avoiding the process of the control device 202 calculating the power data based on the power data. Optionally, the power sensor 201 includes a current sensor and a voltage sensor, and outputs power data based on the sampled current data and voltage data.

[0050] The control device 202 is connected to the power sensor 201 and the backflow energy discharge device 203 respectively, and is used to receive power data detected by the power sensor 201, and control the backflow energy discharge device 203 to access or exit the output circuit of the inverter power supply device 10 according to the power data.

[0051] In the specific implementation process, the reverse energy discharge device 203 is controlled to be connected to the output circuit of the inverter power supply device 10, that is, the reverse energy discharge device 203 is controlled to be turned on and absorb and consume the reverse energy. Correspondingly, the reverse energy discharge device 203 is controlled to exit the output circuit of the inverter power supply device 10, that is, the inverter power supply device 10 is controlled to supply power according to the actual needs of the subsequent output circuit, and the reverse energy discharge device 203 is turned off and does not consume power.

[0052] In different embodiments, the backflow energy release device 203 has different components.

[0053] In a possible implementation, the backfeed energy discharge device 203 includes one or more adjustable dummy loads, wherein the adjustable dummy load includes one or more of an inductive load element, a resistive load element, and a capacitive load element, adapted to different backfeed energy absorption control of the subsequent output circuit.

[0054] In a possible implementation, the backflow energy release device 203 includes one or more fixed-value dummy loads.

[0055] In a possible implementation, the backflow energy release device 203 includes one or more adjustable dummy loads and one or more fixed value dummy loads, wherein the adjustable dummy load includes one or more of an inductive load element, a resistive load element, and a capacitive load element.

[0056] based on Figure 1 It can be seen that the inverter power supply device 10 includes a rectifier AC / DC converter and an inverter DC / AC converter. The backfeed energy discharge device 203 is connected between the DC / AC converter and the rear-stage output circuit of the inverter power supply device 10, that is, connected to the AC output circuit. Its output is AC power. During normal output, the current is positive and negative. The traditional output circuit adopts the method of adding an anti-reverse diode to prevent energy backfeed, which is not applicable. The present application scheme directly collects power data. In terms of the specific composition of the backfeed energy discharge device 203, the AC module is used, which is low in cost and simple in structure compared to the DC module in the existing anti-reverse scheme.

[0057] In addition, the backfeed energy discharge device 203 provided in the embodiment of the present invention can be independently arranged outside the inverter power supply device 10, and will not damage the internal circuit composition of the inverter power supply device 10 to achieve backfeed prevention, and has a simple structure and strong applicability.

[0058] Figure 2 is a flowchart of a backflow control method for an inverter power supply device provided by an embodiment of the present invention, such as Figure 2 As shown, the method comprises the following steps:

[0059] S201, obtaining power data of an output circuit.

[0060] The method provided in this embodiment is performed by a control device for a backfeed control device of an inverter power supply device. When the output circuit structure load includes multiple branches or loads, the power data is the total power data output by the inverter power supply device to the subsequent output circuit.

[0061] S202, when it is determined according to the power data that there is backfeed energy in the output circuit, the backfeed energy discharge device is controlled to be connected to the output circuit, or when it is determined according to the power data that there is no backfeed energy in the output circuit, the backfeed energy discharge device is controlled to exit the output circuit.

[0062] In different embodiments, the manners of determining whether there is backfeed energy in the output circuit according to the power data are different.

[0063] In one possible implementation, judging the presence of backfeed energy in the output circuit based on power data includes: when the power data is a negative value, judging the presence of backfeed energy in the output circuit, i.e., performing anti-backfeed control based on measured data, so as to achieve energy backfeed when it actually occurs, and being able to perform anti-backfeed operation at the initial stage of backfeed.

[0064] In a possible implementation, judging the presence of backflow energy on the output circuit according to the power data includes: judging the presence of backflow energy on the output circuit when the power data is lower than a first preset power value; wherein the power data includes active power. That is, when it is detected that the power data has a decreasing trend and is close to a negative value, it is predicted in advance that energy backflow will occur, and a backflow energy discharge device is connected in advance to ensure that when energy backflow occurs, energy backflow is effectively avoided, such as inside the inverter power supply device.

[0065] Wherein, the first preset power value is a positive value and is determined according to the power value of the electrical load connected to the output circuit. The larger the power value of the electrical load connected to the output circuit, the larger the first preset power value. Optionally, the ratio between the first preset power value and the power value of the electrical load connected to the output circuit is 10% to 30%. The larger the power value of the electrical load connected to the output circuit, the smaller the ratio. Optionally, the ratio is 10%, 15%, 20%, 25% or 30%.

[0066] Among them, determining the first preset power value according to the power value of the electrical load connected to the output circuit can connect the backflow energy discharge device before energy backflow occurs, and the connection time will not be too early or too late, so that energy backflow can be effectively avoided and energy consumption can be optimized.

[0067] For example: when the power value of the electrical load connected to the output circuit is 100w, the ratio is 30%, then the first preset power value is 30w; when the power value of the electrical load connected to the output circuit is 1kw, the ratio is 10%, then the first preset power value is 100w.

[0068] During the application process, as the electrical load in the rear-stage output circuit of the inverter power supply equipment is connected or exited and the energy backflow is eliminated, it is necessary to promptly control the backflow energy discharge device to exit the output circuit to reduce energy consumption.

[0069] In a possible implementation, judging whether there is no backfeed energy in the output circuit according to the power data includes:

[0070] When the backfeed energy discharge device is connected to the output circuit and the power data is higher than the second preset power value, it is determined that there is no backfeed energy on the output circuit; wherein the second preset power value is not lower than the power value of the backfeed energy discharge device.

[0071] Optionally, the second preset power value is determined based on the power value and hysteresis value of the backfeed energy discharge device. The hysteresis value is determined based on the power value of the backfeed energy discharge device. The larger the power value of the backfeed energy discharge device, the larger the hysteresis value, so as to avoid energy backfeeding again in the critical state of backfeed energy elimination, thereby improving the safety of the inverter power supply equipment. Optionally, when the first preset power value is a positive value, the second preset power value can be selected to be not less than the sum of the first preset power value and the power value of the connected backfeed energy discharge device, so as to avoid erroneous judgment of whether there is backfeed energy in the output circuit.

[0072] The embodiment of the present invention designs a backfeed control device connected to the output circuit of the inverter device, and the output circuit is used to connect an electrical load. The backfeed control device includes: a power sensor, a control device and a backfeed energy discharge device, and the power sensor is used to detect the power data of the output circuit of the inverter device. Based on the backfeed control device, the power data of the output circuit of the inverter device is obtained. When it is determined that there is backfeed energy in the circuit according to the power data, the backfeed energy discharge device is controlled to be connected to the output circuit, and the backfeed control process is simple and fast.

[0073] In a possible implementation, in step S202, before controlling the backfeed energy discharge device to connect to the output circuit, the step further includes:

[0074] Determine a target dummy load connected to the output circuit according to the power of the electrical load connected to the output circuit;

[0075] A control strategy for the backflow energy release device is determined according to the target dummy load.

[0076] Among them, determining the target dummy load according to the power of the electrical load connected to the output circuit rather than the power data detected in real time can avoid energy backflow into the inverter power supply equipment to the greatest extent and improve the safety of equipment operation.

[0077] In a possible implementation, determining the target dummy load connected to the output circuit according to the power data of the electrical load connected to the output circuit includes:

[0078] A target power value and / or a target resistance value is calculated based on the power of the electrical load.

[0079] In different embodiments, based on different compositions of the backflow energy release device, different control strategies are determined for the backflow energy release device.

[0080] In a possible implementation, when the backflow energy release device includes one or more fixed-value dummy loads, determining a control strategy for the backflow energy release device according to the target dummy load includes:

[0081] The number of fixed-value dummy loads of the backflow energy discharge device connected to the output circuit is determined according to the target dummy load.

[0082] Among them, the back-feeding energy release device is equipped with multiple fixed-value dummy loads, which can adjust the load amount according to the power of the electrical load, avoid overshoot, and save energy consumption.

[0083] In a possible implementation, when the backflow energy release device includes one or more adjustable dummy loads, determining a control strategy for the backflow energy release device according to a target dummy load includes:

[0084] The number of adjustable dummy loads and / or the input power of the adjustable dummy loads of the backfeed energy discharge device connected to the output circuit is determined according to the target dummy load.

[0085] Among them, the back-feed energy release device adopts an adjustable dummy load to avoid voltage mutations and improve safety.

[0086] In a possible implementation, when the backflow energy discharge device includes one or more fixed-value dummy loads and one or more adjustable dummy loads, a control strategy for the backflow energy discharge device is determined according to a target dummy load, including:

[0087] The number of fixed dummy loads, the number of adjustable dummy loads and the input power of the adjustable dummy loads of the backfeed energy release device connected to the output circuit are determined according to the target dummy load.

[0088] Among them, the backflow energy release device is provided with a fixed dummy load and an adjustable dummy load, which can improve the applicability and realize the precise control of anti-backflow.

[0089] It should be understood that the order of execution of the steps in the above embodiment does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention.

[0090] The following is an embodiment of the device of the present invention. For details not described in detail therein, reference may be made to the corresponding method embodiment described above.

[0091] Figure 3 The structure diagram of the backflow control device for the inverter power supply device provided by the embodiment of the present invention is shown. For the convenience of explanation, only the part related to the embodiment of the present invention is shown, which is described in detail as follows:

[0092] like Figure 3As shown, the backfeed control device for an inverter power supply device includes: an acquisition module 301 , a judgment module 302 and a control module 303 .

[0093] Wherein, the acquisition module 301 is used to acquire power data of the output circuit;

[0094] The judging module 302 is used to judge whether there is backflow energy in the output circuit according to the power data.

[0095] The control module 303 is used to control the backfeed energy discharge device to connect to the output circuit when the judgment module 302 judges that there is backfeed energy in the output circuit, or to control the backfeed energy discharge device to exit the output circuit when it is judged according to the power data that there is no backfeed energy in the output circuit.

[0096] The embodiment of the present invention designs a backfeed control device connected to the output circuit of the inverter device. The backfeed control device includes: a power sensor, a control device and a backfeed energy discharge device, and the power sensor is used to detect the power data of the output circuit of the inverter device. Based on the backfeed control device, the power data of the output circuit of the inverter device is obtained. When it is determined that there is backfeed energy in the circuit according to the power data, the backfeed energy discharge device is controlled to be connected to the output circuit, and the backfeed control process is simple and fast.

[0097] In one possible implementation, the backfeed control device also includes a strategy determination module, which is used to determine a target dummy load connected to the output circuit according to the power of the electrical load connected to the output circuit before the control module 303 controls the backfeed energy discharge device to connect to the output circuit, and determine the control strategy for the backfeed energy discharge device according to the target dummy load.

[0098] Figure 4 is a schematic diagram of a terminal provided by an embodiment of the present invention. Figure 4 As shown, the terminal 4 of this embodiment includes: a processor 40, a memory 41, and a computer program 42 stored in the memory 41 and executable on the processor 40. When the processor 40 executes the computer program 42, the steps in the above-mentioned backflow control method for an inverter power supply device are implemented, for example Figure 2 Alternatively, when the processor 40 executes the computer program 42, the functions of each module / unit in the above-mentioned device embodiments are realized, for example Figure 3 Functions of modules 301 to 303 are shown.

[0099] Exemplarily, the computer program 42 may be divided into one or more modules / units, which are stored in the memory 41 and executed by the processor 40 to implement the present invention. The one or more modules / units may be a series of computer program instruction segments capable of implementing specific functions, which are used to describe the execution process of the computer program 42 in the terminal 4. For example, the computer program 42 may be divided into Figure 3 Modules 301 to 303 are shown.

[0100] The terminal 4 may be a computing device such as a desktop computer, a notebook, a PDA, or a cloud server. The terminal 4 may include, but is not limited to, a processor 40 and a memory 41. Those skilled in the art will appreciate that Figure 4 It is only an example of terminal 4 and does not constitute a limitation on terminal 4. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the terminal may also include input and output devices, network access devices, buses, etc.

[0101] The processor 40 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0102] The memory 41 may be an internal storage unit of the terminal 4, such as a hard disk or memory of the terminal 4. The memory 41 may also be an external storage device of the terminal 4, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the terminal 4. Further, the memory 41 may also include both an internal storage unit and an external storage device of the terminal 4. The memory 41 is used to store the computer program and other programs and data required by the terminal. The memory 41 may also be used to temporarily store data that has been output or is to be output.

[0103] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0104] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0105] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0106] In the embodiments provided by the present invention, it should be understood that the disclosed devices / terminals and methods can be implemented in other ways. For example, the device / terminal embodiments described above are only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0107] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0108] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0109] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of the above-mentioned embodiments of the backflow control method for the inverter power supply device can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device that can carry the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium.

[0110] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A backflow control device for an inverter power supply device, It is characterized in that The backfeed control device is connected to the output circuit of the inverter power supply device, and the output circuit is used to connect the electrical load; the backfeed control device includes: a power sensor, a control device and a backfeed energy discharge device; The power sensor is used to detect power data of the output circuit of the inverter power supply device; The control device is connected to the power sensor and the backfeed energy discharge device respectively, and is used to receive power data detected by the power sensor, and control the backfeed energy discharge device to access or exit the output circuit of the inverter power supply device according to the power data.

2. The backflow control device according to claim 1, It is characterized in that The backflow energy release device includes one or more adjustable dummy loads and / or one or more fixed-value dummy loads; wherein the dummy load includes one or more of an inductive load element, a resistive load element and a capacitive load element.

3. A backflow control method for inverter power supply equipment, It is characterized in that The output circuit of the inverter power supply device is provided with the backfeed control device according to claim 1 or 2; The backflow control method comprises: Acquiring power data of the output circuit; When it is determined according to the power data that there is backfeed energy in the output circuit, the backfeed energy discharge device is controlled to be connected to the output circuit; or when it is determined according to the power data that there is no backfeed energy in the output circuit, the backfeed energy discharge device is controlled to exit the output circuit.

4. The method according to claim 3, It is characterized in that The determining, according to the power data, whether there is backflow energy in the output circuit comprises: When the power data is lower than a first preset power value, it is determined that there is backflow energy in the output circuit; wherein the power data includes active power.

5. The method according to claim 4, It is characterized in that Judging, according to the power data, that there is no backfeed energy in the output circuit includes: When the feedback energy discharge device is connected to the output circuit and the power data is higher than a second preset power value, it is determined that there is no feedback energy on the output circuit; wherein the second preset power value is not lower than the power value of the feedback energy discharge device.

6. The method according to claim 3, It is characterized in that Before controlling the backflow energy discharge device to be connected to the output circuit, the method further includes: Determining a target dummy load connected to the output circuit according to the power of the electrical load connected to the output circuit; A control strategy for the backflow energy discharge device is determined according to the target dummy load.

7. The method according to claim 6, It is characterized in that Determining a target dummy load connected to the output circuit according to power data of an electrical load connected to the output circuit comprises: A target power value and / or a target resistance value is calculated according to the power of the electrical load.

8. The method according to claim 7, It is characterized in that When the backflow energy discharging device includes one or more adjustable dummy loads, determining a control strategy for the backflow energy discharging device according to the target dummy load includes: The number of adjustable dummy loads and / or the input power of the adjustable dummy loads of the backflow energy discharge device connected to the output circuit is determined according to the target dummy load.

9. The method according to claim 7, It is characterized in that When the backflow energy discharge device includes one or more fixed-value dummy loads and one or more adjustable dummy loads, the control strategy for the backflow energy discharge device is determined according to the target dummy load, including: The number of fixed-value dummy loads, the number of adjustable dummy loads, and the input power of the adjustable dummy loads of the backflow energy discharge device connected to the output circuit are determined according to the target dummy load.

10. A computer-readable storage medium storing a computer program. It is characterized in that When the computer program is executed by a processor, the steps of the method as claimed in any one of claims 3 to 9 are implemented.

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