Inverter double auxiliary power supply control method and inverter double auxiliary power supply control system

Abstract

The invention relates to an inverter dual-auxiliary power supply control method and an inverter dual-auxiliary power supply control system. The method comprises the following steps: determining whether a bidirectional inverter currently provides an inversion output voltage for load equipment or not; if yes, controlling the power input end of the first auxiliary power supply to be connected with the energy storage module, so that the first auxiliary power supply supplies power to the main control equipment; if not, determining whether a preset auxiliary power supply switching condition is met at present; and if the auxiliary power supply switching condition is met, controlling the power supply input end of the second auxiliary power supply to be connected with the AC power grid, controlling the load interface of the bidirectional inverter to be connected with the AC power grid, and controlling the first auxiliary power supply to be disconnected from the energy storage module, so that the second auxiliary power supply replaces the first auxiliary power supply to supply power to the main control equipment. According to the embodiment of the invention, the standby power consumption is reduced, the stability of the output voltage of the auxiliary power supply is improved, and the cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of inverters, and in particular to a control method for a dual auxiliary power supply of an inverter and a control system for a dual auxiliary power supply of an inverter. Background Art

[0002] In digital bidirectional inverter switching power supply circuits involving bidirectional inverter functions such as portable energy storage and photovoltaic converters, in order to ensure that the sampling devices, safety relays, switch tube driver chips and MCU main control chips in the main power circuit can work normally when the DC or AC side is powered on, it is necessary to design auxiliary power supplies on the DC side (battery side) and AC side to power the devices according to the voltage levels required by the above devices, so that they enter the working mode before the switch tube is powered on to ensure the normal operation of the whole machine.

[0003] In order to reduce the power consumption of the auxiliary power supply, third-generation semiconductor switching devices such as gallium nitride are generally used, or the loss is reduced by reducing the voltage level of the device. However, the above solutions have the problems of high cost and unstable output voltage of the auxiliary power supply. Summary of the invention

[0004] In view of this, in order to solve some or all of the above technical problems, the embodiments of the present application provide an inverter dual auxiliary power supply control method and an inverter dual auxiliary power supply control system.

[0005] In a first aspect, an embodiment of the present application provides an inverter dual auxiliary power supply control method, the method comprising: determining whether a bidirectional inverter currently provides an inverter output voltage to a load device; if so, controlling a power input terminal of a first auxiliary power supply to be connected to an energy storage module so that the first auxiliary power supply supplies power to a main control device; if not, determining whether a preset auxiliary power supply switching condition is currently met; if the auxiliary power supply switching condition is met, controlling a power input terminal of a second auxiliary power supply to be connected to an AC power grid, controlling a load interface of the bidirectional inverter to be connected to an AC power grid, and controlling the first auxiliary power supply to be disconnected from the energy storage module so that the second auxiliary power supply replaces the first auxiliary power supply to supply power to the main control device.

[0006] In one possible implementation, determining whether a preset auxiliary power switching condition is currently met includes: determining whether a first preset time period has passed from the moment when the bidirectional inverter stops providing the inverter output voltage to the load device to the current moment; if the first preset time period has passed, determining that the auxiliary power switching condition is met.

[0007] In one possible implementation, after controlling the first auxiliary power supply to be disconnected from the energy storage module, the method further includes: if it is detected that the load device is connected to the bidirectional inverter again, after a delay of a second preset time length, controlling the power input terminal of the first auxiliary power supply to be connected to the energy storage module, and controlling the power input terminal of the second auxiliary power supply to be disconnected from the AC power grid, so that the first auxiliary power supply replaces the second auxiliary power supply to supply power to the main control device.

[0008] In a possible implementation, after determining whether a preset auxiliary power switching condition is currently met, the method further includes: if the auxiliary power switching condition is met, controlling a device in the bidirectional inverter that generates power consumption to stop working.

[0009] In a second aspect, an embodiment of the present application provides an inverter dual auxiliary power supply control device, the device comprising: a first determination module, used to determine whether the bidirectional inverter currently provides an inverter output voltage to a load device; a first control module, used to control the power input terminal of the first auxiliary power supply to be connected to the energy storage module if so, so that the first auxiliary power supply supplies power to a main control device; a second determination module, used to determine whether a preset auxiliary power supply switching condition is currently met if not; a second control module, used to control the power input terminal of the second auxiliary power supply to be connected to an AC power grid if the auxiliary power supply switching condition is met, control the load interface of the bidirectional inverter to be connected to the AC power grid, and control the first auxiliary power supply to be disconnected from the energy storage module, so that the second auxiliary power supply replaces the first auxiliary power supply to supply power to the main control device.

[0010] In a third aspect, an embodiment of the present application provides an inverter dual auxiliary power supply control system, the system comprising: a bidirectional inverter, a main control device, an energy storage module, a first auxiliary power supply, a first controlled switch, a second auxiliary power supply, and a second controlled switch; the power input end of the first auxiliary power supply is connected to the energy storage module through the first controlled switch; the power output end of the first auxiliary power supply is connected to the main control device; the power input end of the second auxiliary power supply is connected to the AC power grid through the second controlled switch; the power output end of the second auxiliary power supply is connected to the main control device; the load interface of the bidirectional inverter is connected to the AC power grid through the second controlled switch; the signal output end of the main control device is connected to the bidirectional inverter; the main control device is used to execute the inverter dual auxiliary power supply control method described in the first aspect above.

[0011] In a fourth aspect, an embodiment of the present application provides a bidirectional inverter switching power supply, which includes the inverter dual auxiliary power supply control system described in the third aspect above.

[0012] In a fifth aspect, an embodiment of the present application provides an electronic device, comprising: a memory for storing a computer program; a processor for executing the computer program stored in the memory, and when the computer program is executed, it implements the method of any embodiment of the inverter dual auxiliary power supply control method of the above-mentioned first aspect of the present application.

[0013] In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, a method of any embodiment of the inverter dual auxiliary power supply control method of the first aspect described above is implemented.

[0014] In the seventh aspect, an embodiment of the present application provides a computer program, which includes a computer readable code. When the computer readable code is executed on a device, the processor in the device implements a method as in any embodiment of the inverter dual auxiliary power supply control method of the first aspect mentioned above.

[0015] The inverter dual auxiliary power supply control method and inverter dual auxiliary power supply control system provided by the embodiment of the present application, by controlling the power input terminal of the first auxiliary power supply to be connected to the energy storage module when the bidirectional inverter provides the inverter output voltage to the load device, so that the first auxiliary power supply supplies power to the main control device, and when the bidirectional inverter does not provide the inverter output voltage to the load device, it is determined whether the preset auxiliary power supply switching condition is currently met, and if it is met, the power input terminal of the second auxiliary power supply is controlled to be connected to the AC power grid, the load interface of the bidirectional inverter is controlled to be connected to the AC power grid, and the first auxiliary power supply is controlled to be disconnected from the energy storage module, so that the second auxiliary power supply replaces the first auxiliary power supply to supply power to the main control device. The embodiment of the present application realizes that in the two states of the bidirectional inverter with load and no load, one of the auxiliary power supplies is controlled by the switch to supply power to the main control device of the bidirectional inverter, without the need for two auxiliary power supplies to supply power at the same time, thereby reducing the standby power consumption. And in the case of no load, the auxiliary power supply is powered by the AC power grid, without the need to use special low-power semiconductor devices in the auxiliary power supply, and without reducing the voltage level of the auxiliary power supply, thereby improving the stability of the auxiliary power supply output voltage and reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0019] Figure 1 A schematic diagram of a flow chart of a method for controlling dual auxiliary power supplies of an inverter provided in an embodiment of the present application;

[0020] Figure 2 A flowchart of another inverter dual auxiliary power supply control method provided in an embodiment of the present application;

[0021] Figure 3 A schematic diagram of the structure of an inverter dual auxiliary power supply control system provided in an embodiment of the present application;

[0022] Figure 4 A schematic diagram of the structure of another inverter dual auxiliary power supply control system provided in an embodiment of the present application;

[0023] Figure 5 A schematic diagram of the structure of a dual auxiliary power supply control device for an inverter provided in an embodiment of the present application;

[0024] Figure 6 A schematic diagram of the structure of a bidirectional inverter switching power supply provided in an embodiment of the present application;

[0025] Figure 7 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0026] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. It should be noted that unless otherwise specifically stated, the relative arrangement of the components and steps, the numerical expressions and the numerical values ​​described in these embodiments do not limit the scope of the present application.

[0027] Those skilled in the art will understand that the terms "first" and "second" in the embodiments of the present application are only used to distinguish between different steps, devices, modules and other objects, and do not represent any specific technical meanings, nor do they indicate the logical order between them.

[0028] It should also be understood that in this embodiment, “plurality” may refer to two or more than two, and “at least one” may refer to one, two or more than two.

[0029] It should also be understood that any component, data or structure mentioned in the embodiments of the present application can generally be understood as one or more, unless explicitly limited or otherwise indicated in the context.

[0030] In addition, the term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0031] It should also be understood that the description of the various embodiments in this application focuses on the differences between the various embodiments, and the same or similar aspects thereof can be referenced to each other, and for the sake of brevity, they will not be described one by one.

[0032] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0033] Technologies, circuits, and devices known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the above-mentioned technologies, circuits, and devices should be considered as part of the specification.

[0034] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0035] It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. To facilitate the understanding of the embodiments of the present application, the present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0036] In order to solve the technical problems of high standby power consumption, high cost and poor power supply stability of the auxiliary power supply of the bidirectional inverter in the prior art, the present application provides a dual auxiliary power supply control method for an inverter, which does not require two auxiliary power supplies to be supplied at the same time, does not require the use of special low-power semiconductor devices in the auxiliary power supply, and does not require the reduction of the voltage level of the auxiliary power supply, thereby reducing standby power consumption, improving the stability of the auxiliary power supply output voltage, and reducing costs.

[0037] Figure 1A flow chart of a method for controlling a dual auxiliary power supply of an inverter provided in an embodiment of the present application. The method can be applied to a main control device of a bidirectional inverter, and the main control device can be a control chip arranged in the bidirectional inverter, or an electronic device connected to the bidirectional inverter. In addition, the execution subject of the method can be hardware or software. When the above-mentioned execution subject is hardware, the execution subject can be one or more of the above-mentioned electronic devices. For example, a single electronic device can execute the method, or a plurality of electronic devices can cooperate with each other to execute the method. When the above-mentioned execution subject is software, the method can be implemented as a plurality of software or software modules, or as a single software or software module. No specific limitation is made here.

[0038] like Figure 1 As shown, the method specifically includes:

[0039] Step 101, determining whether the bidirectional inverter currently provides an inverter output voltage to a load device.

[0040] In some embodiments, the main control device executing the method can monitor in real time whether the bidirectional inverter is connected to a load device and provide an inverter output voltage to the load device. For example, it can determine whether to provide an inverter output voltage to the load device by collecting the output current of the load interface in real time.

[0041] If the master control device determines that the bidirectional inverter currently provides an inverter output voltage to the load device, step 102 is executed; otherwise, step 103 is executed.

[0042] Step 102: Control the power input terminal of the first auxiliary power supply to be connected to the energy storage module, so that the first auxiliary power supply supplies power to the main control device.

[0043] In some embodiments, a controlled switch may be provided between the power input terminal of the first auxiliary power supply and the energy storage module. The main control device may control the controlled switch so that the energy storage module provides input voltage to the first auxiliary power supply, and the first auxiliary power supply may supply power to the main control device so that the main control device can operate normally.

[0044] It should be noted that, before receiving the power supply voltage input by the first auxiliary power supply, the main control device is powered by the second auxiliary power supply described below, so as to achieve long-term operation.

[0045] Step 103, determining whether the preset auxiliary power supply switching condition is currently met.

[0046] In some embodiments, if the master control device detects that the bidirectional inverter does not provide an inverter output voltage to the load device, it means that the bidirectional inverter is no longer operating, and the master control device can wait to switch the second auxiliary power supply to supply power to the master control device.

[0047] In the main control device, the auxiliary power supply switching condition can be pre-set. When the auxiliary power supply switching condition is met, the main control device controls the second auxiliary power supply to supply power to the main control device, and stops the first auxiliary power supply from supplying power to the main control device. For example, the power supply switching condition may include: detecting that the load device is disconnected from the bidirectional inverter.

[0048] Step 104, if the auxiliary power supply switching condition is met, control the power input terminal of the second auxiliary power supply to be connected to the AC power grid, control the load interface of the bidirectional inverter to be connected to the AC power grid, and control the first auxiliary power supply to be disconnected from the energy storage module, so that the second auxiliary power supply replaces the first auxiliary power supply to supply power to the main control device.

[0049] In some embodiments, a controlled switch may be provided between the power input terminal of the second auxiliary power supply and the AC power grid, and between the load interface of the bidirectional inverter and the AC power grid. When the power switching conditions are met, the main control device controls the controlled switch to change state so that the AC power grid supplies power to the second auxiliary power supply, and at the same time the load interface is connected to the AC power grid, so that when the load device is connected, the AC power grid supplies power to the load device.

[0050] It should be understood that in order to maintain the continuity of power supply to the main control device, the second auxiliary power supply should first be used to supply power to the main control device, and then the first auxiliary power supply should be stopped from supplying power to the main control device.

[0051] The inverter dual auxiliary power supply control method provided in the embodiment of the present application, by controlling the power input terminal of the first auxiliary power supply to be connected to the energy storage module when the bidirectional inverter provides the inverter output voltage to the load device, so that the first auxiliary power supply supplies power to the main control device, and when the bidirectional inverter does not provide the inverter output voltage to the load device, determining whether the preset auxiliary power supply switching condition is currently met, if it is met, controlling the power input terminal of the second auxiliary power supply to be connected to the AC power grid, controlling the load interface of the bidirectional inverter to be connected to the AC power grid, and controlling the first auxiliary power supply to be disconnected from the energy storage module, so that the second auxiliary power supply replaces the first auxiliary power supply to supply power to the main control device. The embodiment of the present application realizes that in the two states of the bidirectional inverter with load and no load, one of the auxiliary power supplies is controlled by the switch to supply power to the main control device of the bidirectional inverter, without the need for two auxiliary power supplies to supply power at the same time, thereby reducing the standby power consumption. And in the case of no load, the auxiliary power supply is powered by the AC power grid, without the need to use special low-power semiconductor devices in the auxiliary power supply, and without reducing the voltage level of the auxiliary power supply, thereby improving the stability of the auxiliary power supply output voltage and reducing the cost.

[0052] In some optional implementations, such as Figure 2 As shown, step 103 includes:

[0053] Step 1031, determining whether the time from the moment when the bidirectional inverter stops providing the inverter output voltage to the load device to the current moment exceeds a first preset time length.

[0054] Step 1032: If the first preset time period is exceeded, it is determined that the auxiliary power switching condition is met.

[0055] Specifically, when the main control device detects in real time that the inverter output voltage is no longer output to the load device, it starts timing. If the timing duration exceeds a first preset duration (for example, 30 seconds), it is determined that the auxiliary power supply switching condition is met, and then step 104 is executed to switch to the second auxiliary power supply to power the main control device.

[0056] In this embodiment, after the bidirectional inverter stops providing voltage to the load device, the energy storage module continues to provide input voltage to the first auxiliary power supply, and after a delay of a period of time, switches to the second auxiliary power supply, thereby helping to keep the input voltage of the main control device stable before and after switching the auxiliary power supply, and reducing the risk of the bidirectional inverter not being able to work normally due to unstable power supply of the main control device.

[0057] In some optional implementations, after step 104, the method further includes:

[0058] If it is detected that the load device is connected to the bidirectional inverter again, after a delay of a second preset time length, the power input end of the first auxiliary power supply is controlled to be connected to the energy storage module, and the power input end of the second auxiliary power supply is controlled to be disconnected from the AC power grid, so that the first auxiliary power supply replaces the second auxiliary power supply to supply power to the main control device.

[0059] Specifically, since the main control device receives the power supply voltage provided by the first auxiliary power supply, when the bidirectional inverter is not working properly, it can still monitor the load access status of the bidirectional inverter in real time. When it is detected that the inverter output voltage is output to the load device again, the timing starts. If the timing duration exceeds the second preset duration (for example, 3 seconds), the first auxiliary power supply is switched to supply power to the main control device.

[0060] In this embodiment, after the bidirectional inverter provides voltage to the load device again, the AC power grid continues to provide input voltage to the second auxiliary power supply, and after a delay of a period of time, switches to the first auxiliary power supply, thereby helping to keep the input voltage of the main control device stable before and after the bidirectional inverter works, and reducing the risk of the bidirectional inverter not being able to work normally due to unstable power supply of the main control device.

[0061] In some optional implementations, after step 103, the method further includes:

[0062] If the auxiliary power supply switching condition is met, the devices generating power consumption in the bidirectional inverter are controlled to stop working.

[0063] Among them, the devices that generate power consumption in the bidirectional inverter may include an internal switch tube driving module and a switch tube, etc. After the switch tube driver stops working, the bidirectional inverter stops consuming energy, and the second auxiliary power supply provides power for the main control device, thereby reducing the power consumed by the energy storage module.

[0064] Figure 3 The schematic diagram of the structure of an inverter dual auxiliary power supply control system 300 provided in an embodiment of the present application. The system 300 specifically includes: a bidirectional inverter 301, a main control device 302, an energy storage module 303, a first auxiliary power supply 304, a first controlled switch 305, a second auxiliary power supply 306, and a second controlled switch 307.

[0065] like Figure 4 As shown, it shows another structural schematic diagram of the system. Among them, the bidirectional inverter 301 includes an AC protection device F1, which can be a self-recovering fuse, a fuse, a positive temperature coefficient thermistor, etc. The bidirectional inverter 301 also includes an AC rectifier filter module (C1, C2, L1), an inverter and rectifier module (Q1, Q2, Q3, Q4, L2), a DC filter module (C4, C5), and a switch tube drive module. The AC and DC end protection and AC and DC filter modules are mainly to meet the EMC design requirements of the power board, and mainly include a fuse F1, an X capacitor C1, a Y capacitor C2, C3, a common mode inductor L1, and a differential mode inductor L2. The inverter and rectifier module includes a four-switch rectifier circuit. The switch tube drive module has a switch tube control chip and its peripheral circuits.

[0066] The energy storage module 303 includes an energy storage battery and a battery management system.

[0067] In this embodiment, the power input end of the first auxiliary power supply 304 is connected to the energy storage module 303 through the first controlled switch 305 ; the power output end of the first auxiliary power supply 304 is connected to the main control device 302 .

[0068] like Figure 3 As shown, one of the two DC buses externally connected to the energy storage module 303 is directly connected to the first auxiliary power supply 304, and the other is connected to the first controlled switch 305, which is in turn connected to the first auxiliary power supply 304. The main control device 302 outputs a control signal S1 to the first controlled switch 305 to control the on / off state of the first controlled switch 305, and controls the on / off state of the first auxiliary power supply 304 and one of the DC buses, thereby controlling the first auxiliary power supply 304 to receive an input DC voltage or stop receiving an input DC voltage.

[0069] The first auxiliary power supply 304 is a direct current to direct current (DC-DC) power supply module, which can convert the direct current voltage output by the energy storage module 303 into the direct current voltage required by the main control device 302 .

[0070] In this embodiment, the power input end of the second auxiliary power supply 306 is connected to the AC power grid through the second controlled switch 307 ; the power output end of the second auxiliary power supply 306 is connected to the main control device 302 .

[0071] like Figure 3 As shown, one of the two AC busbars of the AC power grid AC is directly connected to the second auxiliary power supply 306, and the other is connected to the second controlled switch 307, which is in turn connected to the second auxiliary power supply 306. The main control device 302 outputs a control signal S2 to the second controlled switch 307 to control the on / off state of the second controlled switch 307, and controls the on / off state of the second auxiliary power supply 306 and one of the AC busbars, thereby controlling the second auxiliary power supply 306 to receive the input AC voltage or stop receiving the input AC voltage.

[0072] The second auxiliary power supply 306 is an AC-DC power supply module, which can convert the AC voltage output by the AC power grid into the DC voltage required by the main control device 302 .

[0073] In this embodiment, the load interface of the bidirectional inverter 301 is connected to the AC power grid through the second controlled switch 307 .

[0074] like Figure 3 As shown, RL is a load device, and its two ends are connected to two load interfaces of the bidirectional inverter 301. The load interface includes two connection ends, one connection end is directly connected to an AC bus of the AC power grid AC, and the other connection end is connected to the relay. The main control device 302 controls the on-off state of the second controlled switch 307, so that the load interface is connected to the AC power from the AC bus, or stops connecting to the AC power.

[0075] In this embodiment, the signal output terminal of the master control device 302 is connected to the bidirectional inverter 301. The master control device 302 can control the state of the components inside the bidirectional inverter 301 to control the working state of the bidirectional inverter 301.

[0076] In this embodiment, the main control device 302 is used to execute the inverter dual auxiliary power supply control method described in any of the above embodiments.

[0077] The inverter dual auxiliary power supply control system provided in the embodiment of the present application includes a bidirectional inverter, a main control device, an energy storage module, a first auxiliary power supply, a first controlled switch, a second auxiliary power supply, and a second controlled switch. Through the main control device, the connection state between the power input terminal of the first auxiliary power supply and the energy storage module is controlled, the connection state between the power input terminal of the second auxiliary power supply and the AC power grid is controlled, and the connection state between the load interface of the bidirectional inverter and the AC power grid is controlled. The embodiment of the present application realizes that when the bidirectional inverter is loaded and unloaded, one of the auxiliary power supplies is controlled by the controlled switch to power the main control device of the bidirectional inverter, without the need for two auxiliary power supplies to supply power at the same time, thereby reducing standby power consumption. And in the case of no load, the auxiliary power supply is powered by the AC power grid, and there is no need to use special low-power semiconductor devices in the auxiliary power supply, nor is there a need to reduce the voltage level of the auxiliary power supply, thereby improving the stability of the output voltage of the auxiliary power supply and reducing costs.

[0078] In some optional implementations, such as Figure 4 As shown, the signal output end of the master control device 302 is connected to the switch tube driving module 3011 of the bidirectional inverter 301. The switch tube driving module is connected to the switch tubes Q1, Q2, Q3, and Q4, and is used to drive the on and off states of the switch tubes under the control of the master control device 302, so that the bidirectional inverter 301 can output AC power to the load device, or obtain AC power from the AC power grid and convert it into DC power to charge the energy storage module 303.

[0079] The main control device 302 is also used for:

[0080] If the preset auxiliary power switching condition is currently met, the switch tube driving module 3011 is controlled to stop running, so that the switch device that generates power consumption in the bidirectional inverter 301 stops working.

[0081] The devices generating power consumption in the bidirectional inverter 301 may include a switch tube driving module 3011 and a Figure 4 After the switch tubes Q1, Q2, Q3, Q4, etc. in the power supply module stop working, the bidirectional inverter 301 stops consuming energy, and the second auxiliary power supply 306 provides power for the main control device 302, thereby reducing the power consumption of the energy storage module 303.

[0082] In some optional implementations, the types of the first controlled switch 305 and the second controlled switch 307 are any of the following: relay, contactor. Both the relay and the contactor can switch on and off states under the control of the main control device 302 to control the first auxiliary power supply 304 and the second auxiliary power supply 306 to supply power to or stop supplying power to the main control device 302. The structure and control method of the relay and the contactor are simple, which helps to reduce costs.

[0083] Figure 5A schematic diagram of the structure of a dual auxiliary power supply control device for an inverter provided in an embodiment of the present application. Specifically comprising:

[0084] A first determination module 501 is used to determine whether the bidirectional inverter currently provides an inverter output voltage to a load device;

[0085] The first control module 502 is used to control the power input terminal of the first auxiliary power module to be connected to the energy storage module if the inverter output voltage is provided to the load device, so that the first auxiliary power module supplies power to the main control device;

[0086] The second determination module 503 is used to determine whether the preset auxiliary power supply switching condition is currently met if the inverter output voltage is not provided to the load device;

[0087] The second control module 504 is used to control the power input terminal of the second auxiliary power supply module to be connected to the AC power grid, control the load interface of the bidirectional inverter to be connected to the AC power grid, and control the first auxiliary power supply to be disconnected from the energy storage module if the auxiliary power supply switching conditions are met, so that the second auxiliary power supply module replaces the first auxiliary power supply module to supply power to the main control device.

[0088] In some optional implementations, the second determination module includes: a first determination unit, used to determine whether the time from the moment when the bidirectional inverter stops providing the inverter output voltage to the load device to the current moment exceeds a first preset time length; a second determination unit, used to determine that the auxiliary power supply switching conditions are met if the time length exceeds the first preset time length.

[0089] In some optional implementations, the device also includes: a third control module, which is used to control the power input terminal of the first auxiliary power supply module to be connected to the energy storage module after a delay of a second preset time period if it is detected that the load device is connected to the bidirectional inverter again, and to control the power input terminal of the second auxiliary power supply module to be disconnected from the AC power grid, so that the first auxiliary power supply module replaces the second auxiliary power supply module to supply power to the main control device.

[0090] In some optional implementations, the device further includes: a fourth control module, configured to control the power-consuming devices in the bidirectional inverter to stop working if the auxiliary power supply switching condition is met.

[0091] The inverter dual auxiliary power supply control device provided in this embodiment can be as follows Figure 5 The inverter dual auxiliary power supply control device shown in can execute all the steps of the above inverter dual auxiliary power supply control methods, thereby achieving the technical effects of the above inverter dual auxiliary power supply control methods. Please refer to the above related description for details. For the sake of brevity, it will not be repeated here.

[0092] Figure 6A schematic diagram of the structure of a bidirectional inverter switching power supply 600 provided in an embodiment of the present application. The bidirectional inverter switching power supply 600 specifically includes the inverter dual auxiliary power supply control system 300 described in the above examples. In addition, the bidirectional inverter switching power supply may also include an AC input interface 601 and a load interface 602. Among them, the AC input interface 601 can be used to connect to an AC power grid, and the load interface 602 is used to connect a load device. The bidirectional inverter switching power supply may also include other functional modules, such as a display module, a communication module, an operation panel, etc. The above functional modules can be connected to the controller included in the DC voltage conversion circuit.

[0093] The bidirectional inverter switching power supply provided in the embodiment of the present application realizes that in both the loaded and unloaded states, one of the auxiliary power supplies is controlled by a controlled switch to supply power to the main control device of the bidirectional inverter, without the need for two auxiliary power supplies to supply power at the same time, thereby reducing the standby power consumption. In addition, in the unloaded state, the auxiliary power supply is powered by the AC power grid, without the need to use special low-power semiconductor devices in the auxiliary power supply, and without the need to reduce the voltage level of the auxiliary power supply, thereby improving the stability of the auxiliary power supply output voltage and reducing the cost.

[0094] Figure 7 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application, Figure 7 The electronic device 700 shown includes: at least one processor 701, a memory 702, at least one network interface 704 and other user interfaces 703. The various components in the electronic device 700 are coupled together via a bus system 705. It is understood that the bus system 705 is used to achieve connection and communication between these components. In addition to the data bus, the bus system 705 also includes a power bus, a control bus and a status signal bus. However, for the sake of clarity, the bus system 705 is not described in detail. Figure 7 Various buses are labeled as bus system 705.

[0095] The user interface 703 may include a display, a keyboard, or a pointing device (eg, a mouse, a trackball, a touch pad, or a touch screen).

[0096] It can be understood that the memory 702 in the embodiment of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM) and direct RAM bus random access memory (DRRAM). The memory 702 described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0097] In some implementations, the memory 702 stores the following elements, executable units or data structures, or a subset thereof, or an extended set thereof: an operating system 7021 and an application 7022 .

[0098] The operating system 7021 includes various system programs, such as a framework layer, a core library layer, a driver layer, etc., which are used to implement various basic services and process hardware-based tasks. The application 7022 includes various application programs, such as a media player (Media Player), a browser (Browser), etc., which are used to implement various application services. The program for implementing the method of the embodiment of the present application can be included in the application 7022.

[0099] In this embodiment, by calling the program or instruction stored in the memory 702, specifically, the program or instruction stored in the application 7022, the processor 701 is used to execute the method steps provided by each method embodiment, for example, including:

[0100] Determine whether the bidirectional inverter currently provides an inverter output voltage to the load device; if so, control the power input terminal of the first auxiliary power supply to be connected to the energy storage module so that the first auxiliary power supply supplies power to the main control device; if not, determine whether the preset auxiliary power supply switching condition is currently met; if the auxiliary power supply switching condition is met, control the power input terminal of the second auxiliary power supply to be connected to the AC power grid, control the load interface of the bidirectional inverter to be connected to the AC power grid, and control the first auxiliary power supply to be disconnected from the energy storage module so that the second auxiliary power supply replaces the first auxiliary power supply to supply power to the main control device.

[0101] The method disclosed in the above embodiment of the present application can be applied to the processor 701, or implemented by the processor 701. The processor 701 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit in the processor 701 or the instruction in the form of software. The above processor 701 can be a general processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to execute, or the hardware and software units in the decoding processor can be executed. The software unit can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 702, and the processor 701 reads the information in the memory 702 and completes the steps of the above method in combination with its hardware.

[0102] It is understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit may be implemented in one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPDevice, DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), general purpose processors, controllers, microcontrollers, microprocessors, other electronic units for performing the above functions of the present application, or a combination thereof.

[0103] For software implementation, the technology described above in this article can be implemented by a unit that performs the functions described above in this article. The software code can be stored in a memory and executed by a processor. The memory can be implemented in the processor or outside the processor.

[0104] The electronic device provided in this embodiment may be Figure 7 The electronic device shown in can execute all the steps of the above-mentioned inverter dual auxiliary power supply control method, thereby achieving the technical effects of the above-mentioned inverter dual auxiliary power supply control method. Please refer to the above related description for details. For the sake of brevity, it will not be repeated here.

[0105] The embodiment of the present application also provides a storage medium (computer-readable storage medium). The storage medium here stores one or more programs. The storage medium may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a read-only memory, a flash memory, a hard disk or a solid-state drive; the memory may also include a combination of the above-mentioned types of memory.

[0106] When one or more programs in the storage medium can be executed by one or more processors, the inverter dual auxiliary power supply control method executed on the electronic device side can be implemented.

[0107] The processor is used to execute the program stored in the memory to implement the following steps of the inverter dual auxiliary power supply control method executed on the electronic device side:

[0108] Determine whether the bidirectional inverter currently provides an inverter output voltage to the load device; if so, control the power input terminal of the first auxiliary power supply to be connected to the energy storage module so that the first auxiliary power supply supplies power to the main control device; if not, determine whether the preset auxiliary power supply switching condition is currently met; if the auxiliary power supply switching condition is met, control the power input terminal of the second auxiliary power supply to be connected to the AC power grid, control the load interface of the bidirectional inverter to be connected to the AC power grid, and control the first auxiliary power supply to be disconnected from the energy storage module so that the second auxiliary power supply replaces the first auxiliary power supply to supply power to the main control device.

[0109] The professionals should further realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. 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 circuits to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0110] The steps of the circuits or algorithms described in conjunction with the embodiments disclosed herein may be implemented using hardware, software modules executed by a processor, or a combination of the two. The software modules may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0111] It should be understood that the terms used in the text are only for the purpose of describing specific example embodiments, and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used in the text may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The steps, processes, and operations described in the text are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0112] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A method for controlling dual auxiliary power supplies of an inverter, characterized in that: The method comprises: Determine whether the bidirectional inverter currently provides an inverter output voltage to the load device; If so, controlling the power input terminal of the first auxiliary power supply to be connected to the energy storage module so that the first auxiliary power supply supplies power to the main control device; If not, determine whether the preset auxiliary power supply switching condition is currently met; If the auxiliary power supply switching condition is met, the power input terminal of the second auxiliary power supply is controlled to be connected to the AC power grid, the load interface of the bidirectional inverter is controlled to be connected to the AC power grid, and the first auxiliary power supply is controlled to be disconnected from the energy storage module, so that the second auxiliary power supply replaces the first auxiliary power supply to supply power to the main control device.

2. The method according to claim 1, characterized in that The step of determining whether the preset auxiliary power supply switching condition is currently met includes: Determine whether a first preset time period has elapsed from the moment when the bidirectional inverter stops providing the inverter output voltage to the load device to the current moment; If the first preset time period is exceeded, it is determined that the auxiliary power supply switching condition is met.

3. The method according to claim 1, characterized in that After controlling the first auxiliary power supply to be disconnected from the energy storage module, the method further includes: If it is detected that the load device is connected to the bidirectional inverter again, after a delay of a second preset time length, the power input end of the first auxiliary power supply is controlled to be connected to the energy storage module, and the power input end of the second auxiliary power supply is controlled to be disconnected from the AC power grid, so that the first auxiliary power supply replaces the second auxiliary power supply to supply power to the main control device.

4. The method according to claim 1, characterized in that: After determining whether the preset auxiliary power supply switching condition is currently met, the method further includes: If the auxiliary power supply switching condition is met, the device generating power consumption in the bidirectional inverter is controlled to stop working.

5. An inverter dual auxiliary power supply control device, characterized in that: The device comprises: A first determination module is used to determine whether the bidirectional inverter currently provides an inverter output voltage to the load device; A first control module is used to control the power input terminal of the first auxiliary power supply to be connected to the energy storage module if an inverter output voltage is provided to the load device, so that the first auxiliary power supply supplies power to the main control device; A second determination module is used to determine whether a preset auxiliary power supply switching condition is currently met if the inverter output voltage is not provided to the load device; The second control module is used to control the power input terminal of the second auxiliary power supply to be connected to the AC power grid, control the load interface of the bidirectional inverter to be connected to the AC power grid, and control the first auxiliary power supply to be disconnected from the energy storage module if the auxiliary power supply switching condition is met, so that the second auxiliary power supply replaces the first auxiliary power supply to supply power to the main control device.

6. An inverter dual auxiliary power supply control system, characterized in that: The system comprises: a bidirectional inverter, a main control device, an energy storage module, a first auxiliary power supply, a first controlled switch, a second auxiliary power supply, and a second controlled switch; The power input end of the first auxiliary power supply is connected to the energy storage module through the first controlled switch; the power output end of the first auxiliary power supply is connected to the main control device; The power input end of the second auxiliary power supply is connected to the AC power grid through the second controlled switch; the power output end of the second auxiliary power supply is connected to the main control device; The load interface of the bidirectional inverter is connected to the AC power grid through the second controlled switch; The signal output terminal of the main control device is connected to the bidirectional inverter; The main control device is used to execute the inverter dual auxiliary power supply control method described in any one of claims 1-4.

7. The system according to claim 6, characterized in that The signal output terminal of the main control device is connected to the switch tube driving module of the bidirectional inverter; The main control device is also used for: If the preset auxiliary power switching condition is currently met, the switch tube driving module is controlled to stop running, so that the switch device that generates power consumption in the bidirectional inverter stops working.

8. The system according to claim 6, characterized in that The types of the first controlled switch and the second controlled switch are any one of the following: relay, contactor.

9. A bidirectional inverter switching power supply, characterized in that: The bidirectional inverter switching power supply includes the inverter dual auxiliary power supply control system according to any one of claims 6-8.

10. An electronic device, characterized in that: include: Memory for storing computer programs; A processor is used to execute the computer program stored in the memory, and when the computer program is executed, the inverter dual auxiliary power supply control method described in any one of claims 1 to 4 is implemented.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the inverter dual auxiliary power supply control method described in any one of claims 1 to 4 is implemented.

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