A control method, device and electronic equipment for a voltage recovery circuit

Abstract

The present application provides a control method, device, and electronic device for a voltage recovery circuit, which relates to the field of power grid power supply technology and alleviates the technical problem of difficult circuit voltage recovery. The method includes: when the power grid stops supplying power to the load, controlling the energy storage element to supply power to the load; controlling the inverter module through the discharge rate controller to convert the power provided by the energy storage element from DC power to AC power; when the inverter module fails, controlling the transient protection module through the transient protection controller to detect whether the load has overvoltage and / or overcurrent; if the load has the overvoltage and / or overcurrent, controlling the energy storage element to stop supplying power to the load.

Description

Technical Field

[0001] The present application relates to the field of power grid power supply technology, and in particular to a control method, device, and electronic device for a voltage recovery circuit. Background Art

[0002] Currently, dynamic voltage restorers based on supercapacitor energy storage are widely used in various power supply and distribution industries, providing voltage drop and short-term power outage protection for various electrical equipment. The specific working process is as follows: the dynamic voltage restorer operates offline. That is, when the power grid is normal, the power is directly supplied to the load from the grid. When the grid loses power or is undervoltage, the power is supplied to the load by energy storage elements such as supercapacitors. Because the dynamic voltage restorer operates in a short-term mode, and supercapacitors have the advantages of low internal resistance and high instantaneous discharge current, existing technologies generally use supercapacitors as energy storage elements.

[0003] However, the use of supercapacitors as energy storage elements has a very high cost and low energy density, so the use of supercapacitors as energy storage elements seriously restricts the application of dynamic voltage restorers. Summary of the Invention

[0004] The purpose of this application is to provide a control method, device and electronic equipment for a voltage recovery circuit to alleviate the technical problem of difficult circuit voltage recovery.

[0005] In a first aspect, an embodiment of the present application provides a control method for a voltage recovery circuit, wherein the voltage recovery circuit includes an energy storage element, an inverter module, a discharge rate controller, a transient protection module, a transient protection controller, and a bypass circuit, wherein the energy storage element includes a battery of a preset type, and the bypass circuit includes a first thyristor; the method includes:

[0006] When the power grid stops supplying power to the load, controlling the energy storage element to supply power to the load;

[0007] Controlling the inverter module through the discharge rate controller to convert the electric energy provided by the energy storage element from direct current to alternating current;

[0008] When the inverter module fails, the transient protection controller controls the transient protection module to detect whether the load has overvoltage and / or overcurrent;

[0009] If the load has the overvoltage and / or the overcurrent condition, the energy storage element is controlled to stop supplying power to the load.

[0010] In one possible implementation, the transient protection module includes: a second thyristor, a fuse, and an absorption resistor, where the second thyristor is located between the fuse and the absorption resistor; if the load has the overvoltage and / or the overcurrent, the step of controlling the energy storage element to stop supplying power to the load includes:

[0011] If the load has the overvoltage and / or the overcurrent, triggering the second thyristor to connect the energy storage element and the absorption resistor;

[0012] controlling the energy storage element to discharge the absorption resistor through the fuse until the fuse blows;

[0013] The energy storage element connected to the fuse is cut off, and the energy storage element is controlled to stop supplying power to the load.

[0014] In one possible implementation, the preset type of battery includes a lead-acid battery and / or a lithium battery.

[0015] In one possible implementation, when the inverter module fails, the step of controlling the transient protection module by the transient protection controller to detect whether the load has an overvoltage and / or overcurrent condition includes:

[0016] When the inverter module fails, the transient protection controller controls the transient protection module to detect whether the voltage of the output current of the energy storage element is within a preset voltage range and / or whether the output current is within a preset current range.

[0017] In one possible implementation, the method further includes:

[0018] Controlling the discharge rate controller to monitor whether the output current change rate of the energy storage element is within a preset change rate range;

[0019] When the output current change rate is not within the preset change rate range, the discharge rate controller is controlled to adjust the output current change rate until it is adjusted to the preset change rate range.

[0020] In one possible implementation, the method further includes:

[0021] When there are multiple groups of batteries of the preset type, the multiple groups of batteries are connected in series.

[0022] In a second aspect, a control device for a voltage recovery circuit is provided, the control device comprising an energy storage element, an inverter module, a discharge rate controller, a transient protection module, a transient protection controller, and a bypass circuit, the energy storage element comprising a battery of a preset type, and the bypass circuit comprising a first thyristor;

[0023] an energy storage element, configured to control itself to supply power to the load when the power grid stops supplying power to the load;

[0024] an inverter module, configured to convert the electrical energy provided by the energy storage element from direct current to alternating current;

[0025] A discharge rate controller, used to control the operation of the inverter module;

[0026] a transient protection module, configured to detect whether the load has an overvoltage and / or overcurrent condition when the inverter module fails, and control the energy storage element to stop supplying power to the load if the load has the overvoltage and / or overcurrent condition;

[0027] An instantaneous protection controller, used to control the operation of the instantaneous protection module;

[0028] The bypass circuit module is used to supply power to the load through the bypass circuit module itself when the power grid is normal, and to control itself to shut down and supply power to the load through the inverter module when the power grid loses power or a fault occurs.

[0029] In one possible implementation, the transient protection module includes: a second thyristor, a fuse, and an absorption resistor, wherein the second thyristor is located between the fuse and the absorption resistor; the transient protection module is configured to:

[0030] If the load has the overvoltage and / or the overcurrent, triggering the second thyristor to connect the energy storage element and the absorption resistor;

[0031] controlling the energy storage element to discharge the absorption resistor through the fuse until the fuse blows;

[0032] The energy storage element connected to the fuse is cut off, and the energy storage element is controlled to stop supplying power to the load.

[0033] In a third aspect, an embodiment of the present application provides an electronic device comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and when the processor executes the computer program, the method described in the first aspect is implemented.

[0034] In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are called and executed by a processor, the computer-executable instructions prompt the processor to execute the method described in the first aspect above.

[0035] The embodiments of the present application bring the following beneficial effects:

[0036] The embodiments of the present application provide a control method, device, and electronic device for a voltage recovery circuit, which can control the energy storage element to supply power to the load when the power grid stops supplying power to the load; control the inverter module through the discharge rate controller to convert the electric energy provided by the energy storage element from DC power to AC power; when the inverter module fails, control the transient protection module through the transient protection controller to detect whether the load has overvoltage and / or overcurrent; if the load has the overvoltage and / or overcurrent, control the energy storage element to stop supplying power to the load. In this solution, since batteries have the characteristics of low cost and high energy density, when the power grid stops supplying power to the load, the batteries can be used as energy storage elements to supply power to the load; in the process of the battery supplying power to the load, the current in the battery flows through the transient protection module and the inverter module. When the inverter module fails, the electronic device will control the transient protection module through the transient protection controller to detect whether the load has overvoltage and / or overcurrent. If overvoltage and / or overcurrent occurs, the energy storage element is controlled to stop supplying power to the load to avoid excessive voltage or current of the load, so as to avoid overvoltage and overcurrent damage to the load; therefore, the energy storage element composed of a battery, the inverter module, the discharge rate controller, the transient protection module, the transient protection controller and the bypass circuit are used to alleviate the technical problem of difficult circuit voltage recovery.

[0037] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0039] Figure 1 A flow chart of a control method for a voltage recovery circuit provided in an embodiment of the present application;

[0040] Figure 2 A circuit schematic diagram of a control method for a voltage recovery circuit provided in an embodiment of the present application;

[0041] Figure 3 A circuit schematic diagram of a transient protection module of a voltage recovery circuit provided in an embodiment of the present application;

[0042] Figure 4Another circuit schematic diagram of the control method of the voltage recovery circuit provided in an embodiment of the present application;

[0043] Figure 5 Another circuit schematic diagram of the transient protection module of the voltage recovery circuit provided in an embodiment of the present application;

[0044] Figure 6 A schematic structural diagram of a control device for a voltage recovery circuit provided in an embodiment of the present application;

[0045] Figure 7 A schematic structural diagram of an electronic device provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0046] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0047] The terms "including," "having," and any variations thereof, as used in the embodiments of this application, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not limited to the listed steps or units but may optionally include other steps or units not listed, or may optionally include other steps or units inherent to the process, method, product, or apparatus.

[0048] At present, dynamic voltage restorers based on supercapacitor energy storage have been widely used in various power supply and distribution industries, providing voltage drop and short-term power outage protection for various electrical equipment. The specific working process is: the dynamic voltage restorer works offline, that is, when the power grid is normal, the power grid directly supplies electricity to the load. When the power grid loses power or is undervoltage, the load is supplied by energy storage elements such as supercapacitors. Since the dynamic voltage restorer is a short-time working mode, and supercapacitors have the advantages of small internal resistance and large instantaneous discharge current, the existing technology generally uses supercapacitors as energy storage elements. However, the use of supercapacitors as energy storage elements is very expensive and has low energy density. Therefore, using supercapacitors as energy storage elements seriously restricts the application of dynamic voltage restorers.

[0049] Based on this, the embodiments of the present application provide a control method, device, and electronic device for a voltage recovery circuit, by which the technical problem of difficult circuit voltage recovery can be alleviated.

[0050] The embodiments of the present application are further described below with reference to the accompanying drawings.

[0051] Figure 1 The present invention provides a flow chart of a control method for a voltage recovery circuit according to an embodiment of the present invention. The method is applied to an electronic device, wherein the voltage recovery circuit includes an energy storage element, an inverter module, a discharge rate controller, a transient protection module, a transient protection controller, and a bypass circuit. The energy storage element includes a battery of a preset type, and the bypass circuit includes a first thyristor. Figure 1 As shown, the method includes:

[0052] Step S110, when the power grid stops supplying power to the load, controlling the energy storage element to supply power to the load;

[0053] It should be noted that the power grid and the circuit are in a parallel structure. If the power grid loses power or is undervoltage, it will stop supplying power to the load. At this time, the electronic equipment will control the battery in the voltage recovery circuit as an energy storage element to supply power to the load.

[0054] Step S120, controlling the inverter module through the discharge rate controller to convert the electric energy provided by the energy storage element from DC electric energy to AC electric energy;

[0055] Step S130, when the inverter module fails, the transient protection controller controls the transient protection module to detect whether the load has overvoltage and / or overcurrent;

[0056] It should be noted that when the energy storage element supplies power to the load, the current in the energy storage element will flow through the inverter module and the transient protection module. When the inverter module fails, the electronic device will control the transient protection module through the transient protection controller to detect the current size, and then determine whether the load has overvoltage and / or overcurrent.

[0057] Step S140: If the load has an overvoltage and / or overcurrent condition, the energy storage element is controlled to stop supplying power to the load.

[0058] Specifically, if the load has an overvoltage and / or overcurrent condition, the electronic device will automatically control the energy storage element to stop supplying power to the load.

[0059] In an embodiment of the present invention, when the power grid stops supplying power to the load, the energy storage element is controlled to supply power to the load; the discharge rate controller controls the inverter module to convert the electric energy provided by the energy storage element from DC power to AC power; when the inverter module fails, the transient protection controller controls the transient protection module to detect whether the load has overvoltage and / or overcurrent; if the load has overvoltage and / or overcurrent, the energy storage element is controlled to stop supplying power to the load. In this solution, since batteries have the characteristics of low cost and high energy density, when the power grid stops supplying power to the load, the batteries can be used as energy storage elements to supply power to the load; in the process of the battery supplying power to the load, the current in the battery flows through the transient protection module and the inverter module. When the inverter module fails, the electronic device will control the transient protection module through the transient protection controller to detect whether the load has overvoltage and / or overcurrent. If overvoltage and / or overcurrent occurs, the energy storage element is controlled to stop supplying power to the load to avoid excessive voltage or current of the load, so as to avoid overvoltage and overcurrent damage to the load; therefore, the energy storage element composed of a battery, the inverter module, the discharge rate controller, the transient protection module, the transient protection controller and the bypass circuit are used to alleviate the technical problem of difficult circuit voltage recovery.

[0060] The above steps are described in detail below.

[0061] For example, Figure 2 The circuit schematic diagram of the control method of the voltage recovery circuit is shown. Specifically, the power grid and the voltage recovery circuit in the present application are connected in parallel. The voltage recovery circuit in the present application includes: an energy storage element, an inverter module, a discharge rate controller, a transient protection module, a transient protection controller and a bypass circuit. The energy storage element includes a battery of a preset type, the bypass circuit includes a first thyristor A, and the number of energy storage elements is 1; Figure 3 The circuit diagram of the transient protection module of the voltage recovery circuit is shown. Figure 2 The corresponding instantaneous protection module includes: a second thyristor S, a fuse F and an absorption resistor R; Figure 4 Shown is another circuit schematic diagram of the control method of the voltage recovery circuit, in which the number of energy storage elements is 2; Figure 5 Shown is another circuit schematic diagram of the instantaneous protection module of the voltage recovery circuit. Specifically, Figure 4 The corresponding instantaneous protection module includes: a second thyristor S, a fuse F and an absorption resistor R.

[0062] In some embodiments, as an example, the transient protection module includes: a second thyristor, a fuse, and an absorption resistor, wherein the second thyristor is located between the fuse and the absorption resistor; step S140 may include the following steps:

[0063] Step a), if the load has an overvoltage and / or overcurrent condition, triggering the second thyristor to connect the energy storage element and the absorption resistor;

[0064] Step b), controlling the energy storage element to discharge the absorption resistor through the fuse until the fuse blows;

[0065] Step c) disconnecting the energy storage element connected to the fuse, and controlling the energy storage element to stop supplying power to the load.

[0066] In an embodiment of the present invention, if there is an overvoltage and / or overcurrent in the load, the electronic device will automatically trigger the second thyristor, thereby connecting the circuit between the energy storage element and the absorption resistor. The electronic device then controls the energy storage element to discharge the absorption resistor through the fuse until the fuse blows. When the fuse blows, the energy storage element connected to the fuse will be cut off, and power supply to the load will be stopped, thereby protecting the load and preventing the load from having too high a voltage or too high a current, thereby preventing overvoltage or overcurrent damage to the load.

[0067] In some embodiments, as an example, the predetermined type of battery includes a lead-acid battery and / or a lithium battery.

[0068] It should be noted that the energy storage element in this circuit can be a lead-acid battery and / or a lithium battery.

[0069] In the embodiment of the present application, the preset type of battery includes a lead-acid battery and / or a lithium battery. Therefore, by utilizing the characteristics of low cost and high energy density of lead-acid batteries and / or lithium batteries, energy storage elements composed of lead-acid batteries and / or lithium batteries can be widely popularized.

[0070] In some embodiments, based on the above step S130, the transient protection controller can control the transient protection module to detect whether the load has overvoltage and / or overcurrent to avoid damage to the load. As an example, step S130 may include the following steps:

[0071] Step d): when the inverter module fails, the transient protection controller controls the transient protection module to detect whether the voltage of the output current of the energy storage element is within a preset voltage range and / or whether the output current is within a preset current range.

[0072] It should be noted that the preset voltage range is a voltage range pre-set by the electronic device. For example, the preset voltage range is [210V, 220V]. When the inverter module fails and current flows through the transient protection module, the electronic device controls the transient protection module through the transient protection controller to detect whether the voltage of the output current of the energy storage element is within the preset voltage range. Specifically, the output current voltage is compared with the preset voltage range [210V, 220V] to determine whether the output current voltage is within the preset voltage range [210V, 220V].

[0073] When the voltage exceeds the maximum value of 220V in the preset voltage range, the electronic device will control the instantaneous protection module through the instantaneous protection controller to reduce the voltage until it is adjusted to the preset voltage range; when the voltage is less than the minimum value of 210V in the preset voltage range, the electronic device will control the instantaneous protection module through the instantaneous protection controller to increase the voltage until it is adjusted to the preset voltage range.

[0074] Alternatively, when the inverter module fails and current flows through the transient protection module, the electronic device will control the transient protection module through the transient protection controller to detect whether the output current of the energy storage element is within a preset current range. Specifically, the output current is compared with the preset current range to determine whether the output current is within the preset current range. When the current exceeds the preset current range, the electronic device will control the transient protection module through the transient protection controller to control the current until it is adjusted to within the preset current range.

[0075] In the embodiment of the present application, when an inverter module fails, the transient protection controller controls the transient protection module to detect whether the voltage of the energy storage element's output current is within a preset voltage range and / or whether the output current is within a preset current range. Therefore, the electronic device controls the transient protection controller to control the transient protection module to detect the output current and / or voltage of the energy storage element, thereby preventing overvoltage and overcurrent damage to the load.

[0076] In some embodiments, the discharge rate controller may be controlled to monitor the output current change rate of the battery. As an example, the method may further include the following steps:

[0077] Step e), controlling the discharge rate controller to monitor whether the output current change rate of the energy storage element is within a preset change rate range;

[0078] Step f): When the output current change rate is not within the preset change rate range, controlling the discharge rate controller to adjust the output current change rate until it is adjusted to the preset change rate range.

[0079] Regarding the above step e), it should be noted that the output current change rate of the battery refers to the value of the derivative of the current with respect to time. For example, if the output current of the battery increases from 0A to 10A, it takes 5 seconds or 10 seconds, then the output current change rate of 5 seconds is greater than the output current change rate of 10 seconds; the preset change rate range refers to the change rate range preset by the electronic device. For example, the preset change rate range is: the time range from 0A to 10A is [5 seconds, 6 seconds].

[0080] For the above step f), specifically, when the output current change rate is not within the preset change rate range and is greater than the critical value of 6 seconds, the discharge rate controller is controlled to adjust the output current change rate until it is adjusted to the preset change rate range; when the output current change rate is less than the critical value of 5 seconds, the discharge rate controller is controlled to adjust the output current change rate until it is adjusted to the preset change rate range.

[0081] In embodiments of the present application, a discharge rate controller can be controlled to monitor whether the output current change rate of an energy storage element is within a preset change rate range. If the output current change rate is not within the preset change rate range, the discharge rate controller is controlled to adjust the output current change rate until it is within the preset change rate range. Therefore, electronic devices monitor the output current change rate of a battery through the discharge rate controller to prevent the output current change rate of the battery from exceeding a preset time range, thereby avoiding safety hazards such as overcurrent damage to the energy storage element and battery overheating.

[0082] In some embodiments, multiple batteries may be connected in parallel and / or in series. As an example, the method may further include the following steps:

[0083] Step g): when there are multiple groups of batteries of the preset type, the multiple groups of batteries are connected in series.

[0084] In this step, when there are multiple groups of batteries of the preset type, the multiple groups of batteries can be connected in series.

[0085] In some embodiments, the discharge rate controller may be controlled to monitor the discharge rate of the battery. As an example, the method may further include the following steps:

[0086] Step h), when current flows through the inverter module, controlling the discharge rate controller to monitor whether the discharge rate of the energy storage element is within a preset time range;

[0087] Step i): when the discharge rate is not within the preset time range, controlling the discharge rate controller to adjust the discharge rate until it is adjusted to the preset time range.

[0088] For the above step h), it should be noted that the discharge rate of the battery refers to a measurement of the battery discharge parameters. The discharge rate is usually expressed in two ways, including hour rate and rate. This application takes the hour rate for detailed description. Specifically, the hour rate is the discharge rate expressed in terms of discharge time. For example, a group of batteries with a rated capacity of 60Ah is discharged in 10 hours, which is called the C10 discharge rate; the preset time range is the time range preset by the electronic device. For example, the preset time range is: [10h, 11h].

[0089] In this step, when current flows through the inverter module, the discharge rate controller monitors whether the discharge rate of the battery is within the preset time range. Specifically, the discharge rate of the battery is compared with the preset time range [10h, 11h] to determine whether the discharge rate of the battery is within the preset time range [10h, 11h].

[0090] For the above step i), when the discharge rate exceeds the maximum value of 11h in the preset time range, the discharge rate controller is controlled to shorten the discharge rate until it is adjusted to within the preset time range; when the discharge rate is less than the minimum value of 10h in the preset time range, the discharge rate controller is controlled to extend the discharge rate until it is adjusted to within the preset time range.

[0091] In the embodiment of the present application, when current flows through the inverter module, the discharge rate controller monitors whether the discharge rate of the energy storage element is within a preset time range. If the discharge rate is not within the preset time range, the discharge rate controller adjusts the discharge rate until it is within the preset time range. Therefore, the electronic device monitors the battery's discharge rate through the discharge rate controller to prevent the battery's discharge rate from exceeding the preset time range, thereby avoiding safety hazards such as overcurrent damage to the energy storage element and battery overheating.

[0092] Figure 6 A schematic diagram of a control device for a voltage recovery circuit is provided. The control device includes an energy storage element, an inverter module, a discharge rate controller, a transient protection module, a transient protection controller, and a bypass circuit. The energy storage element includes a battery of a preset type, and the bypass circuit includes a first thyristor; Figure 6 As shown, the control device 600 of the voltage recovery circuit includes:

[0093] Energy storage element 601, used to control itself to supply power to the load when the power grid stops supplying power to the load;

[0094] The inverter module 602 is used to convert the electric energy provided by the energy storage element from DC electric energy to AC electric energy;

[0095] The discharge rate controller 603 is used to control the operation of the inverter module;

[0096] The transient protection module 604 is used to detect whether the load has overvoltage and / or overcurrent when the inverter module fails, and if the load has overvoltage and / or overcurrent, control the energy storage element to stop supplying power to the load;

[0097] The instantaneous protection controller 605 is used to control the operation of the instantaneous protection module;

[0098] The bypass circuit module 606 is used to supply power to the load through the bypass circuit module itself when the grid is normal, and to control itself to shut down and supply power to the load through the inverter module when the grid loses power or fails.

[0099] In some embodiments, the transient protection module includes: a second thyristor, a fuse, and an absorption resistor, wherein the second thyristor is located between the fuse and the absorption resistor; the transient protection module is configured to:

[0100] If there is an overvoltage and / or overcurrent condition on the load, triggering the second thyristor to connect the energy storage element and the absorption resistor;

[0101] Control the energy storage element to discharge the absorption resistor through the fuse until the fuse melts;

[0102] Cut off the energy storage element connected to the fuse and control the energy storage element to stop supplying power to the load.

[0103] In some embodiments, the predetermined type of battery includes a lead-acid battery and / or a lithium battery.

[0104] In some embodiments, the transient protection module is configured to:

[0105] When the inverter module fails, the transient protection controller controls the transient protection module to detect whether the voltage of the output current of the energy storage element is within a preset voltage range and / or whether the output current is within a preset current range.

[0106] In some embodiments, the control device is further configured to:

[0107] A discharge rate controller monitors whether the output current change rate of the energy storage element is within a preset change rate range;

[0108] When the output current change rate is not within the preset change rate range, the discharge rate controller is controlled to adjust the output current change rate until it is adjusted to the preset change rate range.

[0109] In some embodiments, the control device is further configured to:

[0110] When there are multiple groups of batteries of the preset type, the multiple groups of batteries are connected in series.

[0111] The control device of the voltage recovery circuit provided in the embodiment of the present application has the same technical features as the control method of the voltage recovery circuit provided in the above embodiment, and therefore can also solve the same technical problems and achieve the same technical effects.

[0112] An electronic device provided in an embodiment of the present application is Figure 7 As shown, the electronic device 700 includes a memory 701 and a processor 702. The memory stores a computer program that can be run on the processor. When the processor executes the computer program, the steps of the method provided in the above embodiment are implemented.

[0113] See also Figure 7 The electronic device further includes a bus 703 and a communication interface 704 , and the processor 702 , the communication interface 704 and the memory 701 are connected via the bus 703 .

[0114] The memory 701 may include high-speed random access memory (RAM) and may also include non-volatile memory, such as at least one disk storage. The system network element communicates with at least one other network element via at least one communication interface 704 (which may be wired or wireless), and may utilize the Internet, a wide area network, a local area network, a metropolitan area network, or the like.

[0115] The bus 703 may be an ISA bus, a PCI bus, or an EISA bus. The bus may be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, Figure 7 Only one bidirectional arrow is used in the diagram, but this does not mean that there is only one bus or one type of bus.

[0116] Among them, the memory 701 is used to store programs, and the processor 702 executes the program after receiving the execution instruction. The method executed by the device defined by the process disclosed in any embodiment of the present application can be applied to the processor 702 or implemented by the processor 702.

[0117] The processor 702 may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method can be completed by an integrated logic circuit of hardware in the processor 702 or by instructions in the form of software. The above-mentioned processor 702 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gates or transistor logic devices, or discrete hardware components. The various methods, steps, and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium well-known in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. The storage medium is located in memory 701, and processor 702 reads the information in memory 701 and, in conjunction with its hardware, completes the steps of the above method.

[0118] Corresponding to the control method of the above-mentioned voltage recovery circuit, an embodiment of the present application also provides a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are called and executed by the processor, the computer-executable instructions prompt the processor to execute the steps of the control method of the above-mentioned voltage recovery circuit.

[0119] The control device of the voltage recovery circuit provided in the embodiment of the present application can be specific hardware on the device or software or firmware installed on the device. The implementation principle and technical effects of the device provided in the embodiment of the present application are the same as those of the aforementioned method embodiment. For the sake of brief description, for any part not mentioned in the device embodiment, reference can be made to the corresponding content in the aforementioned method embodiment. Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can all refer to the corresponding processes in the aforementioned method embodiment, and will not be repeated here.

[0120] In the embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, 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 communication interface, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0121] For another example, the flowcharts and block diagrams in the accompanying drawings show the possible architectures, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of code, and the module, program segment or a part of code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of the boxes in the block diagram and / or flowchart, can be implemented with a dedicated hardware-based system that performs the specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0122] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0123] In addition, each functional unit in the embodiments provided in the present application 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.

[0124] If the function 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 technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the control method for voltage recovery in the circuit described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, and other media that can store program codes.

[0125] It should be noted that similar numbers and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and are not to be understood as indicating or implying relative importance.

[0126] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The scope of protection of the present application is not limited thereto. Although the present application has been described in detail with reference to the above-mentioned embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-mentioned embodiments within the technical scope disclosed in the present application, or perform equivalent replacements for some of the technical features thereof. However, these modifications, changes, or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application. They should all be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A control method for a voltage recovery circuit, characterized in that: The voltage recovery circuit includes an energy storage element, an inverter module, a discharge rate controller, a transient protection module, a transient protection controller, and a bypass circuit. The energy storage element includes a battery of a preset type, and the bypass circuit includes a first thyristor. The method includes: When the power grid stops supplying power to the load, controlling the energy storage element to supply power to the load; Controlling the inverter module through the discharge rate controller to convert the electric energy provided by the energy storage element from direct current to alternating current; When the inverter module fails, the transient protection controller controls the transient protection module to detect whether the load has overvoltage and / or overcurrent; If the load has the overvoltage and / or the overcurrent, controlling the energy storage element to stop supplying power to the load; The transient protection module includes: a second thyristor, a fuse, and an absorption resistor, wherein the second thyristor is located between the fuse and the absorption resistor; if the load has the overvoltage and / or the overcurrent, the step of controlling the energy storage element to stop supplying power to the load includes: If the load has the overvoltage and / or the overcurrent, triggering the second thyristor to connect the energy storage element and the absorption resistor; controlling the energy storage element to discharge the absorption resistor through the fuse until the fuse blows; Cutting off the energy storage element connected to the fuse, and controlling the energy storage element to stop supplying power to the load; The method further comprises: When current flows through the inverter module, the discharge rate controller monitors whether the discharge rate of the energy storage element is within a preset time range; When the discharge rate is not within the preset time range, the discharge rate controller is controlled to adjust the discharge rate until it is adjusted to the preset time range.

2. The control method of the voltage recovery circuit according to claim 1, characterized in that: The preset type of battery includes a lead-acid battery and / or a lithium battery.

3. The control method of the voltage recovery circuit according to claim 1, characterized in that: The step of controlling the transient protection module to detect whether the load has overvoltage and / or overcurrent by the transient protection controller when the inverter module fails comprises: When the inverter module fails, the transient protection controller controls the transient protection module to detect whether the output voltage of the energy storage element is within a preset voltage range and / or whether the output current is within a preset current range.

4. The control method of the voltage recovery circuit according to claim 1, characterized in that: The method further comprises: Controlling the discharge rate controller to monitor whether the output current change rate of the energy storage element is within a preset change rate range; When the output current change rate is not within the preset change rate range, the discharge rate controller is controlled to adjust the output current change rate until it is adjusted to the preset change rate range.

5. The control method of the voltage recovery circuit according to claim 1, characterized in that: The method further comprises: When there are multiple groups of batteries of the preset type, the multiple groups of batteries are connected in series.

6. A control device for a voltage recovery circuit, characterized in that: The control device includes an energy storage element, an inverter module, a discharge rate controller, a transient protection module, a transient protection controller and a bypass circuit, the energy storage element includes a battery of a preset type, and the bypass circuit includes a first thyristor; an energy storage element, configured to control itself to supply power to the load when the power grid stops supplying power to the load; an inverter module, configured to convert the electrical energy provided by the energy storage element from direct current to alternating current; A discharge rate controller, used to control the operation of the inverter module; a transient protection module, configured to detect whether the load has an overvoltage and / or overcurrent condition when the inverter module fails, and control the energy storage element to stop supplying power to the load if the load has the overvoltage and / or overcurrent condition; An instantaneous protection controller, used to control the operation of the instantaneous protection module; The bypass circuit module is used to supply power to the load through the bypass circuit module itself when the power grid is normal, and to control itself to shut down when the power grid loses power or a fault occurs, and supply power to the load through the inverter module; Wherein, the instantaneous protection module includes: a second thyristor, a fuse and an absorption resistor, and the second thyristor is located between the fuse and the absorption resistor; a transient protection module, configured to trigger the second thyristor to connect the energy storage element and the absorption resistor if the load experiences the overvoltage and / or overcurrent; controlling the energy storage element to discharge the absorption resistor through the fuse until the fuse blows; Cutting off the energy storage element connected to the fuse, and controlling the energy storage element to stop supplying power to the load; The device is also used to: when current flows through the inverter module, control the discharge rate controller to monitor whether the discharge rate of the energy storage element is within a preset time range; when the discharge rate is not within the preset time range, control the discharge rate controller to adjust the discharge rate until it is adjusted to the preset time range.

7. An electronic device comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 5 are implemented.

8. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer-executable instructions. When the computer-executable instructions are called and executed by a processor, the computer-executable instructions prompt the processor to execute the method according to any one of claims 1 to 5.

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