Adaptive voltage determination circuit, method and apparatus for governing voltage sag

Abstract

The application discloses an adaptive voltage determination circuit, method and device for treating voltage sag. The circuit comprises a full-bridge rectifier, a charging circuit, an energy storage capacitor, a discharging circuit and a power electronic converter, the energy storage capacitor is used for storing or releasing electric energy, wherein the full-bridge rectifier is connected with the power electronic converter; the charging circuit is connected with the full-bridge rectifier at one end and connected with the energy storage capacitor at the other end, and is used for charging the energy storage capacitor in response to the target DC bus voltage being the same as the rated voltage; the discharging circuit is connected with the energy storage capacitor at one end and connected with the power electronic converter at the other end, and is used for controlling the energy storage capacitor to discharge in response to the target DC bus voltage being less than the rated voltage, so that the output voltage of the discharging circuit is the same as the target output voltage. The application solves the technical problem of low voltage stability in the circuit where the power electronic equipment is located.

Description

Technical Field

[0001] This invention relates to the field of circuit design technology, and more specifically, to an adaptive voltage determination circuit, method, and apparatus for managing voltage sags. Background Technology

[0002] Currently, power electronic devices such as frequency converters, servo controllers, and switching power supplies are widely used in industrial production for the precision manufacturing of high value-added products. However, these power electronic devices have low transient immunity to the supply voltage and will shut down within a short-cycle low voltage period, resulting in a technical problem of low voltage stability in the circuits in which the power electronic devices are located.

[0003] There is currently no effective solution to the technical problem of low voltage stability in the circuits of power electronic devices. Summary of the Invention

[0004] This invention provides an adaptive voltage determination circuit, method, and apparatus for mitigating voltage sags, addressing the technical problem of low voltage stability in circuits containing power electronic devices.

[0005] According to one aspect of the invention, an adaptive voltage determination circuit for mitigating voltage sags is provided. The circuit includes: a full-bridge rectifier, a charging circuit, an energy storage capacitor, a discharging circuit, and a power electronic converter. The energy storage capacitor is used to store or release electrical energy. The full-bridge rectifier is connected to the power electronic converter and is used to output a target DC bus voltage. The charging circuit is connected at one end to the full-bridge rectifier and at the other end to the energy storage capacitor, and is used to charge the energy storage capacitor in response to the target DC bus voltage being the same as the rated voltage. The discharging circuit is connected at one end to the energy storage capacitor and at the other end to the power electronic converter, and is used to control the energy storage capacitor to discharge in response to the target DC bus voltage being less than the rated voltage, so as to control the output voltage of the discharging circuit to be the same as the target output voltage.

[0006] Optionally, the charging circuit includes: a first energy storage inductor for storing or releasing electrical energy; a first reverse protection diode, the input terminal of which is connected to the output terminal of the first energy storage inductor; and a first transistor connected to the output terminal of the first energy storage inductor.

[0007] Optionally, the discharge circuit includes: a second transistor connected to the output terminal of the first reverse protection diode; a second energy storage inductor, the input terminal of which is connected to the second transistor for storing or releasing electrical energy; a freewheeling diode, the input terminal of which is connected to the other end of the energy storage capacitor, and the output terminal of which is connected to the input terminal of the second energy storage inductor; a second reverse protection diode, the input terminal of which is connected to the output terminal of the second energy storage inductor, and the output terminal of which is connected to a power electronic converter; and a filter capacitor, one end of which is connected to the output terminal of the second energy storage inductor, and the other end of which is connected to the input terminal of the freewheeling diode.

[0008] According to one aspect of the invention, a method for determining the appropriate voltage to mitigate voltage sags is provided. This method is applied to an appropriate voltage determination circuit for mitigating voltage sags and may include: acquiring a target DC bus voltage; comparing the target DC bus voltage with a rated voltage to obtain a comparison result; in response to the comparison result indicating that the target DC bus voltage is the same as the rated voltage, charging an energy storage capacitor to obtain a charging result, wherein the charging result characterizes successful charging of the energy storage capacitor; and in response to the comparison result indicating that the target DC bus voltage is less than the rated voltage, controlling the energy storage capacitor to discharge so as to control the output voltage to be the same as the target output voltage, obtaining a discharge result, wherein the discharge result characterizes successful discharge of the energy storage capacitor.

[0009] Optionally, in response to the comparison result that the target DC bus voltage is the same as the rated voltage, the energy storage capacitor is charged to obtain a charging result, including: in response to the comparison result that the target DC bus voltage is the same as the rated voltage, controlling the first transistor to turn on to obtain a first storage result, wherein the first storage result is used to characterize that the first energy storage inductor converts the input electrical energy into magnetic energy and successfully stores it; based on the first storage result, the energy storage capacitor is charged using the first energy storage inductor to obtain a first release result, wherein the first release result is used to characterize that the first energy storage inductor converts the stored magnetic energy into electrical energy and successfully releases it; and the first release result is determined as the charging result.

[0010] Optionally, in response to the comparison result that the target DC bus voltage is less than the rated voltage, the energy storage capacitor is controlled to discharge so that the output voltage is the same as the target output voltage, and a discharge result is obtained. This includes: in response to the comparison result that the target DC bus voltage is less than the rated voltage, controlling the first transistor to turn on and the second transistor to turn on, to obtain a second storage result, wherein the second storage result is used to characterize that the second energy storage inductor converts the input electrical energy into magnetic energy and successfully stores it; based on the second storage result, controlling the first transistor to turn on, the second transistor to turn off, and the freewheeling diode to turn on, controlling the energy storage capacitor to discharge so that the output voltage is the same as the target output voltage, to obtain a second release result, wherein the second release result is used to characterize that the second energy storage inductor converts the stored magnetic energy into electrical energy and successfully releases it; and determining the second release result as the discharge result.

[0011] According to one aspect of the present invention, an adaptation voltage determination device for mitigating voltage sags is provided. This device is applied to an adaptation voltage determination circuit for mitigating voltage sags. The device may include: an acquisition unit for acquiring a target DC bus voltage; a comparison unit for comparing the target DC bus voltage with a rated voltage to obtain a comparison result; a charging unit for charging an energy storage capacitor in response to the comparison result indicating that the target DC bus voltage is the same as the rated voltage, to obtain a charging result, wherein the charging result indicates that the energy storage capacitor has been successfully charged; and a discharging unit for controlling the energy storage capacitor to discharge in response to the comparison result indicating that the target DC bus voltage is less than the rated voltage, so as to control the output voltage to be the same as the target output voltage, to obtain a discharging result, wherein the discharging result indicates that the energy storage capacitor has been successfully discharged.

[0012] According to another aspect of the present invention, an electronic device is also provided, comprising: a memory storing an executable program; and a processor for running the program, wherein the program executes the methods of various embodiments of the present invention during runtime.

[0013] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored executable program, wherein, when the executable program is executed, it controls the device where the computer-readable storage medium is located to perform the methods of various embodiments of the present invention.

[0014] According to another aspect of the present invention, a computer program product is also provided, including a computer program that, when executed by a processor, implements the methods of various embodiments of the present invention.

[0015] According to another aspect of the present invention, a computer program product is also provided, including a non-volatile computer-readable storage medium storing a computer program that, when executed by a processor, implements the methods of various embodiments of the present invention.

[0016] According to another aspect of the present invention, a computer program is also provided, which, when executed by a processor, implements the methods of the various embodiments of the present invention.

[0017] In this embodiment of the invention, the voltage determination circuit for controlling voltage sags may include: a full-bridge rectifier, a charging circuit, an energy storage capacitor, a discharging circuit, and a power electronic converter. The energy storage capacitor is used to store or release electrical energy. The full-bridge rectifier is connected to the power electronic converter and is used to output the target DC bus voltage. The charging circuit is connected to the full-bridge rectifier at one end and to the energy storage capacitor at the other end, and is used to charge the energy storage capacitor in response to the target DC bus voltage being the same as the rated voltage. The discharging circuit is connected to the energy storage capacitor at one end and to the power electronic converter at the other end, and is used to control the energy storage capacitor to discharge in response to the target DC bus voltage being less than the rated voltage, so as to achieve the purpose of controlling the output voltage of the discharging circuit to be the same as the target output voltage. Based on the aforementioned adaptive voltage determination circuit, this invention can first obtain the target DC bus voltage, then compare the target DC bus voltage with the rated voltage to obtain a comparison result. If the target DC bus voltage is the same as the rated voltage, the energy storage capacitor can be charged to obtain a charging result; if the target DC bus voltage is less than the rated voltage, the energy storage capacitor can be controlled to discharge, so that the output voltage of the discharge voltage is the same as the target output voltage, thereby maintaining the output voltage in a stable state and protecting the power electronic equipment in the circuit. This solves the technical problem of low voltage stability in the circuit where the power electronic equipment is located, and achieves the technical effect of improving voltage stability in the circuit where the power electronic equipment is located. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings:

[0019] Figure 1 This is a schematic diagram of an adaptive voltage determination circuit for mitigating voltage sags according to an embodiment of the present invention;

[0020] Figure 2 This is a flowchart of a method for determining the appropriate voltage to manage voltage sags according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the operation of a Boost boost circuit when the S1 switch is turned on, according to an embodiment of the present invention.

[0022] Figure 4This is a schematic diagram of the operation of a Boost boost circuit when the S1 switch is off, according to an embodiment of the present invention.

[0023] Figure 5 This is a schematic diagram of the operation of a Buck step-down circuit when the S2 switch is turned on, according to an embodiment of the present invention.

[0024] Figure 6 This is a schematic diagram of the operation of a Buck step-down circuit when the S2 switch is off, according to an embodiment of the present invention.

[0025] Figure 7 This is a schematic diagram of an adaptive voltage determination device for managing voltage sags according to an embodiment of the present invention. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0027] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0028] According to an embodiment of the present invention, an adaptive voltage determination circuit for managing voltage sags is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0029] The following describes the adaptive voltage determination circuit for mitigating voltage sags according to an embodiment of the present invention.

[0030] Figure 1This is a schematic diagram of an adaptation voltage determination circuit for mitigating voltage sags according to an embodiment of the present invention, as shown below. Figure 1 As shown, the circuit may include: a full-bridge rectifier 101, a charging circuit 102, an energy storage capacitor 103, a discharging circuit 104, and a power electronic converter 105, wherein the energy storage capacitor is used to store electrical energy or release electrical energy.

[0031] The full-bridge rectifier 101 is connected to the power electronic converter 105 and is used to output the target DC bus voltage;

[0032] A full-bridge rectifier is a circuit used to rectify industrial frequency alternating current (AC) into direct current (DC). Its main process involves rectifying the input AC signal into a unidirectional DC signal, providing a stable DC voltage supply to the load devices in the circuit and thus enabling power supply functionality.

[0033] The charging circuit 102 is connected at one end to the full-bridge rectifier 101 and at the other end to the energy storage capacitor 103. It is used to charge the energy storage capacitor in response to the target DC bus voltage being the same as the rated voltage.

[0034] The charging circuit, also known as a boost converter, is used to increase the input voltage to a higher output voltage. Boost converters are commonly used in solar cells, electric vehicles, and mobile phone chargers to output the required high voltage.

[0035] Furthermore, the energy storage capacitor 103 can be called an energy storage supercapacitor, and is represented by C1. The rated voltage can be simply referred to as the rated value.

[0036] The discharge circuit 104 is connected at one end to the energy storage capacitor 103 and at the other end to the power electronic converter 105. It is used to control the energy storage capacitor to discharge in response to the target DC bus voltage being less than the rated voltage, so as to control the output voltage of the discharge circuit to be the same as the target output voltage.

[0037] The discharge circuit, also known as a Buck converter, is a power management circuit used to convert a high input voltage to a lower output voltage. Its main function is to reduce the voltage to meet the lower voltage requirements of specific devices or circuits. This type of Buck converter is commonly used in battery-powered devices, portable devices, and other devices that require a stable low voltage.

[0038] In this embodiment of the invention, the voltage determination circuit for controlling voltage sags may include: a full-bridge rectifier, a charging circuit, an energy storage capacitor, a discharging circuit, and a power electronic converter. The energy storage capacitor is used to store or release electrical energy. The full-bridge rectifier is connected to the power electronic converter and is used to output the target DC bus voltage. The charging circuit is connected to the full-bridge rectifier at one end and to the energy storage capacitor at the other end, and is used to charge the energy storage capacitor in response to the target DC bus voltage being the same as the rated voltage. The discharging circuit is connected to the energy storage capacitor at one end and to the power electronic converter at the other end, and is used to control the energy storage capacitor to discharge in response to the target DC bus voltage being less than the rated voltage, so as to achieve the purpose of controlling the output voltage of the discharging circuit to be the same as the target output voltage. Based on the aforementioned adaptive voltage determination circuit, this invention can first obtain the target DC bus voltage, then compare the target DC bus voltage with the rated voltage to obtain a comparison result. If the target DC bus voltage is the same as the rated voltage, the energy storage capacitor can be charged to obtain a charging result; if the target DC bus voltage is less than the rated voltage, the energy storage capacitor can be controlled to discharge, so that the output voltage of the discharge voltage is the same as the target output voltage, thereby maintaining the output voltage in a stable state and protecting the power electronic equipment in the circuit. This solves the technical problem of low voltage stability in the circuit where the power electronic equipment is located, and achieves the technical effect of improving voltage stability in the circuit where the power electronic equipment is located.

[0039] The circuit described in this embodiment will be further described below.

[0040] As an optional embodiment, the charging circuit includes: a first energy storage inductor for storing or releasing electrical energy; a first reverse protection diode, the input terminal of which is connected to the output terminal of the first energy storage inductor; and a first transistor connected to the output terminal of the first energy storage inductor.

[0041] In this embodiment, the charging circuit may include: a first energy storage inductor, a first anti-reverse diode, and a first transistor. The first energy storage inductor, also known as an inductor or inductor, is an electronic component used to store and release energy, and can be represented by L1.

[0042] Furthermore, the first reverse protection diode is used to prevent reverse voltage or reverse current in the circuit from damaging other components, and can be represented by D1. The first transistor can be an Insulated Gate Bipolar Transistor (IGBT), which can be called an IGBT switch, and is represented by S1.

[0043] For example, a charging circuit for a supercapacitor is composed of an energy storage inductor, an IGBT switch, and a reverse protection diode. The charging voltage of the supercapacitor C1 is controlled by controlling the on and off states of the IGBT device.

[0044] As an optional embodiment, the discharge circuit includes: a second transistor connected to the output terminal of a first reverse-biased diode; a second energy storage inductor, the input terminal of which is connected to the second transistor, for storing or releasing electrical energy; a freewheeling diode, the input terminal of which is connected to the other end of the energy storage capacitor, and the output terminal of which is connected to the input terminal of the second energy storage inductor; a second reverse-biased diode, the input terminal of which is connected to the output terminal of the second energy storage inductor, and the output terminal of which is connected to a power electronic converter; and a filter capacitor, one end of which is connected to the output terminal of the second energy storage inductor, and the other end of which is connected to the input terminal of the freewheeling diode.

[0045] In this embodiment, the discharge circuit may include: a second transistor, a second energy storage inductor, a freewheeling diode, a second anti-reverse diode, and a filter capacitor. The second transistor can be referred to as an IGBT switch and is denoted by S2. The second energy storage inductor can be denoted by L2.

[0046] As can be understood, a freewheeling diode, represented by D2, is used to allow current to flow in one direction and prevent current from flowing in the reverse direction. That is, it provides a stable current flow while protecting other components in the circuit from damage by reverse voltage.

[0047] Optionally, the second anti-reverse diode is used to ensure that the current direction is unidirectional, thereby avoiding the formation of circulating current, and is represented by D3. The filter capacitor is used to filter out high-frequency noise or fluctuating signals in the circuit, so that only the required signal is transmitted in the circuit, reducing the ripple of the output voltage, and is represented by C2.

[0048] For example, a discharge circuit for the target bus is composed of an IGBT switching transistor, an energy storage inductor, a freewheeling diode, a filter capacitor, and a reverse protection diode. The discharge voltage to the target bus is controlled by controlling the on and off states of the IGBT devices.

[0049] According to another aspect of the present invention, a method for determining the adaptation voltage to manage voltage sags is also provided, which is applied to the adaptation voltage determination circuit described above. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0050] Figure 2 This is a flowchart of a method for determining the adaptation voltage to mitigate voltage sags according to an embodiment of the present invention, as shown below. Figure 2 As shown, the method includes the following steps:

[0051] Step S201: Obtain the target DC bus voltage.

[0052] In step S201 of this embodiment of the invention, the target DC bus voltage can be obtained by using the full-bridge rectifier in the voltage matching circuit, and then the obtained target DC bus voltage can be further processed. The target DC bus voltage can be determined by U... i To express.

[0053] It should be noted that this is only a preferred embodiment for obtaining the target DC bus voltage, and the process and method for obtaining the target DC bus voltage are not specifically limited. As long as the process and method for obtaining the target DC bus voltage are achieved through a full-bridge rectifier, they are all within the protection scope of this invention, and will not be listed here.

[0054] Step S202: Compare the target DC bus voltage with the rated voltage to obtain the comparison result.

[0055] In step S202 of this embodiment of the invention, after obtaining the target DC bus voltage, the target DC bus voltage can be compared with the rated voltage to obtain a comparison result. The comparison result is either that the target DC bus voltage is the same as the rated voltage, or that the target DC bus voltage is less than the rated voltage.

[0056] Optionally, depending on the different comparison results, it is necessary to control the adapter voltage to determine whether specific components in the circuit are turned on or off, so that the target DC bus voltage in the circuit is maintained in a stable state, thereby protecting the components in the circuit from damage.

[0057] In step S203, in response to the comparison result that the target DC bus voltage is the same as the rated voltage, the energy storage capacitor is charged to obtain the charging result.

[0058] In step S203 of this embodiment of the invention, based on the comparison results obtained above, if the comparison results show that the target DC bus voltage is the same as the rated voltage, the energy storage capacitor can be charged using the charging circuit to obtain the charging result, wherein the charging result is used to characterize the successful charging of the energy storage capacitor.

[0059] For example, when the target DC bus voltage is at its rated value, the Boost circuit starts working and charges the supercapacitor. Once the charging is basically complete, it can switch to standby float charging mode.

[0060] In step S204, in response to the comparison result that the target DC bus voltage is less than the rated voltage, the energy storage capacitor is controlled to discharge so as to control the output voltage to be the same as the target output voltage, and the discharge result is obtained.

[0061] In step S204 of this embodiment of the invention, if the comparison result obtained above indicates that the target DC bus voltage is less than the rated voltage, then the discharge circuit is used to control the energy storage capacitor to discharge, so that the output voltage of the discharge circuit is the same as the target output voltage, thereby obtaining the discharge result.

[0062] Optionally, the discharge result is used to characterize the successful discharge of the energy storage capacitor. The target output voltage can be a preset voltage, a rated voltage, or the rated DC bus voltage.

[0063] For example, when the target DC bus voltage drops, the Buck step-down circuit starts to work. When the output voltage is equal to the rated value of the DC bus voltage, it can maintain the normal operation of the equipment in the circuit until the output voltage recovers to the target voltage, or the voltage of the energy storage supercapacitor drops below the rated value of the DC bus voltage.

[0064] Furthermore, the energy output of the supercapacitor can be represented by 1 / 2CΔU2. Depending on the power of the target device, when the voltage of the supercapacitor is reduced to below the rated value of the DC bus voltage, the energy provided can support the device to operate for 400 milliseconds (ms), thereby enabling the configuration of an appropriate number of supercapacitors.

[0065] In this embodiment of the invention, the voltage determination circuit for controlling voltage sags may include: a full-bridge rectifier, a charging circuit, an energy storage capacitor, a discharging circuit, and a power electronic converter. The energy storage capacitor is used to store or release electrical energy. The full-bridge rectifier is connected to the power electronic converter and is used to output the target DC bus voltage. The charging circuit is connected to the full-bridge rectifier at one end and to the energy storage capacitor at the other end, and is used to charge the energy storage capacitor in response to the target DC bus voltage being the same as the rated voltage. The discharging circuit is connected to the energy storage capacitor at one end and to the power electronic converter at the other end, and is used to control the energy storage capacitor to discharge in response to the target DC bus voltage being less than the rated voltage, so as to achieve the purpose of controlling the output voltage of the discharging circuit to be the same as the target output voltage. Based on the aforementioned adaptive voltage determination circuit, this invention can first obtain the target DC bus voltage, then compare the target DC bus voltage with the rated voltage to obtain a comparison result. If the target DC bus voltage is the same as the rated voltage, the energy storage capacitor can be charged to obtain a charging result; if the target DC bus voltage is less than the rated voltage, the energy storage capacitor can be controlled to discharge, so that the output voltage of the discharge voltage is the same as the target output voltage, thereby maintaining the output voltage in a stable state and protecting the power electronic equipment in the circuit. This solves the technical problem of low voltage stability in the circuit where the power electronic equipment is located, and achieves the technical effect of improving voltage stability in the circuit where the power electronic equipment is located.

[0066] As an optional embodiment, in response to the comparison result that the target DC bus voltage is the same as the rated voltage, the energy storage capacitor is charged to obtain a charging result, including: in response to the comparison result that the target DC bus voltage is the same as the rated voltage, controlling the first transistor to turn on to obtain a first storage result, wherein the first storage result is used to characterize that the first energy storage inductor converts the input electrical energy into magnetic energy and successfully stores it; based on the first storage result, the energy storage capacitor is charged using the first energy storage inductor to obtain a first release result, wherein the first release result is used to characterize that the first energy storage inductor converts the stored magnetic energy into electrical energy and successfully releases it; and the first release result is determined as the charging result.

[0067] In this embodiment, when the comparison result shows that the target DC bus voltage is the same as the rated voltage, the first transistor can be turned on to obtain the first storage result, so that the first energy storage inductor converts the input electrical energy into magnetic energy and successfully stores it.

[0068] For example, Figure 3 This is a schematic diagram of the operation of a Boost converter circuit when the S1 switch is turned on, according to an embodiment of the present invention. Figure 3 As shown, when the IGBT switch S1 is turned on, the energy storage inductor L1 in the Boost circuit will generate a self-induced electromotive force U due to the characteristics of the inductor itself.L This will hinder the increase of current. The above process is equivalent to inductor L1 converting electrical energy into magnetic energy for storage, and diode D1 can prevent capacitor discharge. The input current of the energy storage inductor L1 can be controlled by i... L To illustrate, the input voltage of the boost circuit can be expressed as U. i To illustrate, the output voltage of the boost circuit can be expressed as U o To express.

[0069] Optionally, based on the first storage result obtained above, the first transistor is controlled to turn off, so that the first energy storage inductor charges the energy storage capacitor in order to obtain the first release result, and the first release result obtained above is determined as the charging result.

[0070] For example, Figure 4 This is a schematic diagram of the operation of a Boost converter circuit when the S1 switch is off, according to an embodiment of the present invention. Figure 4 As shown, when the IGBT switch S1 is turned off, the current flowing through the energy storage inductor L1 in the Boost circuit decreases, and due to the characteristics of the energy storage inductor itself, L1 will generate a self-induced electromotive force U. L This hinders the decrease in current, and in the above process, it is equivalent to the energy storage inductor L1 releasing the stored magnetic energy. At this time, the voltage U across the energy storage capacitor C1... o =U i +U L Furthermore, the output voltage is greater than the input voltage, thus achieving the purpose of charging the energy storage capacitor C1 using a boost converter. The input current of the energy storage capacitor C1 can be controlled by i... c To express.

[0071] Furthermore, by controlling the duty cycle of the IGBT switch S1 during its on and off states, the charging voltage of the energy storage capacitor C1 can be controlled.

[0072] It should be noted that this is only a preferred embodiment for determining the charging result, and the process and method for determining the charging result are not specifically limited. As long as the energy storage capacitor is charged in response to the comparison result that the target DC bus voltage is the same as the rated voltage, the process and method for obtaining the charging result are within the protection scope of this invention, and will not be listed here.

[0073] As an optional embodiment, in response to the comparison result that the target DC bus voltage is less than the rated voltage, the energy storage capacitor is controlled to discharge so that the output voltage is the same as the target output voltage, and a discharge result is obtained. This includes: in response to the comparison result that the target DC bus voltage is less than the rated voltage, controlling the first transistor to turn on and the second transistor to turn on, obtaining a second storage result, wherein the second storage result is used to characterize that the second energy storage inductor converts the input electrical energy into magnetic energy and successfully stores it; based on the second storage result, controlling the first transistor to turn on, the second transistor to turn off, and the freewheeling diode to turn on, controlling the energy storage capacitor to discharge so that the output voltage is the same as the target output voltage, obtaining a second release result, wherein the second release result is used to characterize that the second energy storage inductor converts the stored magnetic energy into electrical energy and successfully releases it; and determining the second release result as the discharge result.

[0074] In this embodiment, if the comparison result shows that the target DC bus voltage is less than the rated voltage, the first transistor and the second transistor can be turned on to obtain the second storage result, so that the second energy storage inductor can convert the input electrical energy into magnetic energy and successfully store it.

[0075] For example, Figure 5 This is a schematic diagram of the operation of a Buck step-down circuit when the S2 switch is turned on, according to an embodiment of the present invention. Figure 5 As shown, when the IGBT switch S2 is turned on, the energy storage inductor L2 will generate a self-induced electromotive force U. L In order to impede the increase of current, the energy storage inductor L2 converts electrical energy into magnetic energy for storage, and the output voltage U of the step-down circuit... o =U C -U L Among them, the voltage of the energy storage supercapacitor C1 is controlled by U. C This is represented. The input current of the energy storage inductor L2 passes through i L To express.

[0076] Optionally, based on the second storage result obtained above, the first transistor can be turned on, the second transistor can be turned off, and the freewheeling diode can be turned on to control the energy storage capacitor to discharge, so as to control the output voltage to be the same as the target output voltage, thereby achieving the purpose of obtaining the second release result.

[0077] For example, Figure 6 This is a schematic diagram of the operation of a Buck step-down circuit when the S2 switch is off, according to an embodiment of the present invention. Figure 6 As shown, when the IGBT switch S2 is turned off, the energy storage inductor L2 will generate a self-induced electromotive force U. L In order to impede the decrease in current, the freewheeling diode D2 is controlled to conduct, thus obtaining the output voltage U. o =U LFurthermore, the output voltage can be controlled by adjusting the duty cycle of the IGBT switch S2 during its on and off states. When the target DC bus voltage drops, the energy storage capacitor C1 discharges through the Buck step-down circuit to maintain the stability of the target DC bus voltage.

[0078] In this embodiment, the voltage determination circuit for controlling voltage sags may include: a full-bridge rectifier, a charging circuit, an energy storage capacitor, a discharging circuit, and a power electronic converter. The energy storage capacitor is used to store or release electrical energy. The full-bridge rectifier is connected to the power electronic converter and is used to output the target DC bus voltage. The charging circuit is connected to the full-bridge rectifier at one end and to the energy storage capacitor at the other end, and is used to charge the energy storage capacitor in response to the target DC bus voltage being the same as the rated voltage. The discharging circuit is connected to the energy storage capacitor at one end and to the power electronic converter at the other end, and is used to control the energy storage capacitor to discharge in response to the target DC bus voltage being less than the rated voltage, so as to achieve the purpose of controlling the output voltage of the discharging circuit to be the same as the target output voltage. Based on the aforementioned adaptive voltage determination circuit, this invention can first obtain the target DC bus voltage, then compare the target DC bus voltage with the rated voltage to obtain a comparison result. If the target DC bus voltage is the same as the rated voltage, the energy storage capacitor can be charged to obtain a charging result; if the target DC bus voltage is less than the rated voltage, the energy storage capacitor can be controlled to discharge, so that the output voltage of the discharge voltage is the same as the target output voltage, thereby maintaining the output voltage in a stable state and protecting the power electronic equipment in the circuit. This solves the technical problem of low voltage stability in the circuit where the power electronic equipment is located, and achieves the technical effect of improving voltage stability in the circuit where the power electronic equipment is located.

[0079] The technical solutions of the embodiments of the present invention will be illustrated below with reference to preferred embodiments.

[0080] Currently, power electronic devices such as frequency converters, servo controllers, and switching power supplies are widely used in industrial production for the precision manufacturing of high value-added products. However, due to the low transient immunity of these power electronic devices to the supply voltage, voltage dips in the power system often occur, or the system may shut down within one or two cycles of low voltage, which can lead to equipment damage in severe cases.

[0081] Statistical data on power system voltage sag events show that for over 99% of devices, the duration of a single voltage sag does not exceed 200ms. Of these, approximately 15% of devices experience a second voltage sag, also not exceeding 200ms, following the initial sag. This means that 99% of devices will experience power supply voltage instability events leading to the shutdown of user power electronic equipment, with each event lasting no more than 400ms. This results in low voltage stability within the circuits housing power electronic equipment.

[0082] To address the aforementioned problems, this invention proposes a short-time energy source device based on supercapacitor energy storage. This device is a low-power charging device that can utilize time to exchange for energy during long standby periods, fully charging the energy storage element. The device uses supercapacitors with low energy density but high power density as the energy storage element, providing short-time backup power of over 400ms. This avoids 99% of production interruptions caused by voltage instability in actual production, thereby solving the technical problem of low voltage stability in circuits containing power electronic equipment and achieving the technical effect of improving voltage stability in circuits containing power electronic equipment.

[0083] Optionally, commonly used short-term energy source devices are classified into three categories according to their working principle: online continuous uninterruptible power supplies (UPS), offline interactive dynamic voltage restorers (DVRs), and emergency power supplies (EPS) that restart after a mains power outage. They are also classified according to the backup power endurance of their energy storage components: batteries with endurance ranging from minutes to hours and supercapacitors with endurance ranging from seconds.

[0084] In this embodiment of the invention, the voltage determination circuit for controlling voltage sags may include: a full-bridge rectifier, a charging circuit, an energy storage capacitor, a discharging circuit, and a power electronic converter. The energy storage capacitor is used to store or release electrical energy. The full-bridge rectifier is connected to the power electronic converter and is used to output the target DC bus voltage. The charging circuit is connected to the full-bridge rectifier at one end and to the energy storage capacitor at the other end, and is used to charge the energy storage capacitor in response to the target DC bus voltage being the same as the rated voltage. The discharging circuit is connected to the energy storage capacitor at one end and to the power electronic converter at the other end, and is used to control the energy storage capacitor to discharge in response to the target DC bus voltage being less than the rated voltage, so as to achieve the purpose of controlling the output voltage of the discharging circuit to be the same as the target output voltage.

[0085] Optionally, the charging circuit may include: an energy storage inductor L1, a reverse-biased diode D1, and a transistor S1, wherein the input terminal of the energy storage inductor L1 is connected to the output terminal of the full-bridge rectifier, the output terminal of the energy storage inductor L1 is connected to the input terminal of the reverse-biased diode D1, and the transistor S1 is connected to the input terminal of the reverse-biased diode D1.

[0086] Optionally, the discharge circuit may include: transistor S2, energy storage inductor L2, freewheeling diode D2, reverse protection diode D3, and filter capacitor C2. One end of transistor S2 is connected to energy storage capacitor C1, and the other end of transistor S2 is connected to freewheeling diode D2 and one end of energy storage inductor L2. The other end of energy storage inductor L2 is connected to filter capacitor C2 and reverse protection diode D3.

[0087] Optionally, a charging circuit for the supercapacitor is formed by an energy storage inductor, an IGBT switch, and a reverse protection diode. The charging voltage of the supercapacitor C1 is controlled by controlling the on and off states of the IGBT device.

[0088] Optionally, a discharge circuit for the target bus is composed of an IGBT switching transistor, an energy storage inductor, a freewheeling diode, a filter capacitor, and a reverse protection diode. The discharge voltage to the target bus is controlled by controlling the on and off states of the IGBT devices.

[0089] In this embodiment of the invention, when the target DC bus voltage is at its rated value, the Boost circuit starts working and charges the supercapacitor. After the charging is basically completed, it can switch to standby float charging state. When the target DC bus voltage drops, the Buck circuit starts working. When the output voltage is equal to the rated value of the DC bus voltage, it can maintain the normal operation of the equipment in the circuit until the output voltage recovers to the target voltage or the voltage of the supercapacitor drops below the rated value of the DC bus voltage.

[0090] Optionally, the energy output of the supercapacitor can be represented by 1 / 2CΔU2. Depending on the power of the target device, the energy provided can support the device to operate for 400ms when the voltage of the supercapacitor is reduced to below the rated value of the DC bus voltage, thereby enabling the configuration of an appropriate number of supercapacitors.

[0091] Optionally, such as Figure 3 As shown, when the IGBT switch S1 is turned on, the energy storage inductor L1 in the Boost circuit will generate a self-induced electromotive force U due to the characteristics of the inductor itself. L This will hinder the increase of current. The above process is equivalent to inductor L1 converting electrical energy into magnetic energy for storage, and diode D1 can prevent capacitor discharge. The input current of the energy storage inductor L1 can be controlled by i... LTo illustrate, the input voltage of the boost circuit can be expressed as U. i To illustrate, the output voltage of the boost circuit can be expressed as U o To express.

[0092] Optionally, such as Figure 4 As shown, when the IGBT switch S1 is turned off, the current flowing through the energy storage inductor L1 in the Boost circuit decreases, and due to the characteristics of the energy storage inductor itself, L1 will generate a self-induced electromotive force U. L This hinders the decrease in current, and in the above process, it is equivalent to the energy storage inductor L1 releasing the stored magnetic energy. At this time, the voltage U across the energy storage capacitor C1... o =U i +U L Furthermore, the output voltage is greater than the input voltage, thus achieving the purpose of charging the energy storage capacitor C1 using a boost converter. The input current of the energy storage capacitor C1 can be controlled by i... c To express.

[0093] Furthermore, by controlling the duty cycle of the IGBT switch S1 during its on and off states, the charging voltage of the energy storage capacitor C1 can be controlled.

[0094] Optionally, such as Figure 5 As shown, when the IGBT switch S2 is turned on, the energy storage inductor L2 will generate a self-induced electromotive force U. L In order to impede the increase of current, the energy storage inductor L2 converts electrical energy into magnetic energy for storage, and the output voltage U of the step-down circuit... o =U C -U L Among them, the voltage of the energy storage supercapacitor C1 is controlled by U. C This is represented. The input current of the energy storage inductor L2 passes through i L To express.

[0095] Optionally, such as Figure 6 As shown, when the IGBT switch S2 is turned off, the energy storage inductor L2 will generate a self-induced electromotive force U. L In order to impede the decrease in current, the freewheeling diode D2 is controlled to conduct, thus obtaining the output voltage U. o =U L Furthermore, the output voltage can be controlled by adjusting the duty cycle of the IGBT switch S2 during its on and off states. When the target DC bus voltage drops, the energy storage capacitor C1 discharges through the Buck step-down circuit to maintain the stability of the target DC bus voltage.

[0096] In this embodiment, the voltage determination circuit for controlling voltage sags may include: a full-bridge rectifier, a charging circuit, an energy storage capacitor, a discharging circuit, and a power electronic converter. The energy storage capacitor is used to store or release electrical energy. The full-bridge rectifier is connected to the power electronic converter and is used to output the target DC bus voltage. The charging circuit is connected to the full-bridge rectifier at one end and to the energy storage capacitor at the other end, and is used to charge the energy storage capacitor in response to the target DC bus voltage being the same as the rated voltage. The discharging circuit is connected to the energy storage capacitor at one end and to the power electronic converter at the other end, and is used to control the energy storage capacitor to discharge in response to the target DC bus voltage being less than the rated voltage, so as to achieve the purpose of controlling the output voltage of the discharging circuit to be the same as the target output voltage. Based on the aforementioned adaptive voltage determination circuit, this invention can first obtain the target DC bus voltage, then compare the target DC bus voltage with the rated voltage to obtain a comparison result. If the target DC bus voltage is the same as the rated voltage, the energy storage capacitor can be charged to obtain a charging result; if the target DC bus voltage is less than the rated voltage, the energy storage capacitor can be controlled to discharge, so that the output voltage of the discharge voltage is the same as the target output voltage, thereby maintaining the output voltage in a stable state and protecting the power electronic equipment in the circuit. This solves the technical problem of low voltage stability in the circuit where the power electronic equipment is located, and achieves the technical effect of improving voltage stability in the circuit where the power electronic equipment is located.

[0097] According to embodiments of the present invention, an adaptability voltage determination device for mitigating voltage sags is provided. It should be noted that this adaptability voltage determination device for mitigating voltage sags can be used to execute one of the adaptability voltage determination methods for mitigating voltage sags described in the embodiments.

[0098] Figure 7 This is a schematic diagram of an adaptation voltage determination device for mitigating voltage sags according to an embodiment of the present invention. This device can utilize an adaptation voltage determination circuit for mitigating voltage sags. Figure 7 As shown, an adaptive voltage determination device 700 for managing voltage sags may include: an acquisition unit 701, a comparison unit 702, a charging unit 703, and a discharging unit 704.

[0099] Acquisition unit 701 is used to acquire the target DC bus voltage.

[0100] The comparison unit 702 is used to compare the target DC bus voltage with the rated voltage to obtain the comparison result.

[0101] The charging unit 703 is used to charge the energy storage capacitor in response to the comparison result that the target DC bus voltage is the same as the rated voltage, and to obtain the charging result, wherein the charging result is used to characterize the successful charging of the energy storage capacitor.

[0102] The discharge unit 704 is used to control the energy storage capacitor to discharge in response to the comparison result that the target DC bus voltage is less than the rated voltage, so as to control the output voltage to be the same as the target output voltage and obtain the discharge result. The discharge result is used to characterize the successful discharge of the energy storage capacitor.

[0103] Optionally, the charging unit 703 may include: a first control module, configured to control the first transistor to turn on in response to a comparison result indicating that the target DC bus voltage is the same as the rated voltage, to obtain a first storage result, wherein the first storage result is used to characterize that the first energy storage inductor converts the input electrical energy into magnetic energy and successfully stores it; a charging module, configured to charge the energy storage capacitor using the first energy storage inductor based on the first storage result, to obtain a first release result, wherein the first release result is used to characterize that the first energy storage inductor converts the stored magnetic energy into electrical energy and successfully releases it; and a first determining submodule, configured to determine the first release result as the charging result.

[0104] Optionally, the discharge unit 704 may include: a second control module, configured to control the first transistor to turn on and the second transistor to turn on in response to a comparison result that the target DC bus voltage is less than the rated voltage, to obtain a second storage result, wherein the second storage result is used to characterize that the second energy storage inductor converts the input electrical energy into magnetic energy and successfully stores it; a discharge module, configured to control the first transistor to turn on, the second transistor to turn off, and the freewheeling diode to turn on based on the second storage result, to control the energy storage capacitor to discharge, so as to control the output voltage to be the same as the target output voltage, to obtain a second release result, wherein the second release result is used to characterize that the second energy storage inductor converts the stored magnetic energy into electrical energy and successfully releases it; and a second determining submodule, configured to determine the second release result as the discharge result.

[0105] In this embodiment, the target DC bus voltage is acquired by an acquisition unit; the target DC bus voltage is compared with the rated voltage by a comparison unit to obtain a comparison result; the energy storage capacitor is charged by a charging unit in response to the comparison result indicating that the target DC bus voltage is the same as the rated voltage, to obtain a charging result, wherein the charging result is used to characterize that the energy storage capacitor is successfully charged; the energy storage capacitor is controlled to discharge by a discharging unit in response to the comparison result indicating that the target DC bus voltage is less than the rated voltage, so as to control the output voltage to be the same as the target output voltage, to obtain a discharging result, wherein the discharging result is used to characterize that the energy storage capacitor is successfully discharged, thereby maintaining the output voltage in a stable state, protecting the power electronic equipment in the circuit, solving the technical problem of low voltage stability in the circuit where the power electronic equipment is located, and achieving the technical effect of improving voltage stability in the circuit where the power electronic equipment is located.

[0106] Embodiments of the present invention also provide an electronic device, including: a memory storing an executable program; and a processor for running the program, wherein the program executes the methods of various embodiments of the present invention during runtime.

[0107] Embodiments of the present invention also provide a computer-readable storage medium including a stored executable program, wherein, when the executable program is executed, it controls the device where the computer-readable storage medium is located to perform the methods of various embodiments of the present invention.

[0108] Embodiments of the present invention also provide a computer program product, including a computer program that, when executed by a processor, implements the methods of various embodiments of the present invention.

[0109] Embodiments of the present invention also provide a computer program product, including a non-volatile computer-readable storage medium for storing a computer program, which, when executed by a processor, implements the methods of various embodiments of the present invention.

[0110] Embodiments of the present invention also provide a computer program that, when executed by a processor, implements the methods described in the various embodiments of the present invention.

[0111] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0112] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0113] In the several embodiments provided by this invention, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed can be through some interfaces; the indirect coupling or communication connection of units or modules can be electrical or other forms.

[0114] The units described as separate components may or may not be physically separate. 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 units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0115] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0116] If the integrated unit is implemented as 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 invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0117] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A voltage determination circuit for mitigating voltage sags, characterized in that, include: The system comprises a full-bridge rectifier, a charging circuit, an energy storage capacitor, a discharging circuit, and a power electronic converter. The energy storage capacitor is used to store or release electrical energy. The full-bridge rectifier is connected to the power electronic converter and is used to rectify the input AC signal, convert the AC signal into a unidirectional DC signal, and output the target DC bus voltage corresponding to the DC signal. The charging circuit is connected at one end to the full-bridge rectifier and at the other end to the energy storage capacitor. It is used to charge the energy storage capacitor in response to the target DC bus voltage being the same as the rated voltage. The energy storage capacitor is an energy storage supercapacitor. The discharge circuit has one end connected to the energy storage capacitor and the other end connected to the power electronic converter. It is used to control the energy storage capacitor to discharge in response to the target DC bus voltage being less than the rated voltage, so as to control the output voltage of the discharge circuit to be the same as the target output voltage. The charging circuit includes: a first energy storage inductor, a first anti-reverse diode, and a first transistor. The first energy storage inductor is used to store or release electrical energy. The input terminal of the first anti-reverse diode is connected to the output terminal of the first energy storage inductor. The first transistor is an insulated-gate bipolar transistor and is connected to the output terminal of the first energy storage inductor. The charging circuit is also used to control the charging voltage of the energy storage capacitor by controlling the conduction or cutoff of the first transistor. The discharge circuit includes: a second transistor, a second energy storage inductor, a freewheeling diode, a second reverse protection diode, and a filter capacitor. The second transistor is connected to the output terminal of the first reverse protection diode. The second energy storage inductor stores or releases electrical energy. The freewheeling diode allows current to flow in one direction and prevents current from flowing in the opposite direction. The input terminal of the second reverse protection diode is connected to the output terminal of the second energy storage inductor, and the output terminal of the second reverse protection diode is connected to the power electronic converter. The filter capacitor filters out high-frequency noise or fluctuating signals. The discharge circuit is also used to control the discharge voltage of the target DC bus by controlling the conduction or cutoff of the second transistor.

2. The circuit according to claim 1, characterized in that, The input terminal of the second energy storage inductor is connected to the second transistor; the input terminal of the freewheeling diode is connected to the other end of the energy storage capacitor, and the output terminal of the freewheeling diode is connected to the input terminal of the second energy storage inductor; one end of the filter capacitor is connected to the output terminal of the second energy storage inductor, and the other end of the filter capacitor is connected to the input terminal of the freewheeling diode.

3. A method for determining the appropriate voltage to mitigate voltage sags, characterized in that, The adaptive voltage determination circuit for mitigating voltage sags as described in any one of claims 1 to 2 includes: The target DC bus voltage is obtained using a full-bridge rectifier; The target DC bus voltage and the rated voltage are compared to obtain the comparison results; In response to the comparison result that the target DC bus voltage is the same as the rated voltage, the first transistor is controlled to turn on to obtain a first storage result; based on the first storage result, the energy storage capacitor is charged to obtain a charging result, wherein the first storage result is used to characterize that the first energy storage inductor converts the input electrical energy into magnetic energy and successfully stores it, and the charging result is used to characterize that the energy storage capacitor is successfully charged, and the energy storage capacitor is an energy storage supercapacitor. In response to the comparison result that the target DC bus voltage is less than the rated voltage, the first transistor and the second transistor are turned on to obtain a second storage result; based on the second storage result, the energy storage capacitor is controlled to discharge so that the output voltage is the same as the target output voltage to obtain a discharge result, wherein the second storage result is used to characterize that the second energy storage inductor converts the input electrical energy into magnetic energy and successfully stores it, and the discharge result is used to characterize that the energy storage capacitor discharges successfully.

4. The method according to claim 3, characterized in that, Based on the first storage result, the energy storage capacitor is charged to obtain the charging result, including: Based on the first storage result, the energy storage capacitor is charged using the first energy storage inductor to obtain a first release result, wherein the first release result is used to characterize that the first energy storage inductor converts the stored magnetic energy into electrical energy and successfully releases it; The first release result is determined as the charging result.

5. The method according to claim 3, characterized in that, Based on the second storage result, the energy storage capacitor is controlled to discharge so that the output voltage is the same as the target output voltage, and the discharge result is obtained, including: Based on the second storage result, the first transistor is turned on, the second transistor is turned off, and the freewheeling diode is turned on. The energy storage capacitor is controlled to discharge so that the output voltage is the same as the target output voltage, and a second release result is obtained. The second release result is used to characterize that the second energy storage inductor converts the stored magnetic energy into electrical energy and successfully releases it. The second release result is determined as the discharge result.

6. A device for determining the appropriate voltage to mitigate voltage sags, characterized in that, The adaptive voltage determination circuit for mitigating voltage sags as described in any one of claims 1 to 2 includes: The acquisition unit is used to acquire the target DC bus voltage using a full-bridge rectifier; The comparison unit is used to compare the target DC bus voltage with the rated voltage to obtain a comparison result; A charging unit is configured to control a first transistor to turn on in response to the comparison result that the target DC bus voltage is the same as the rated voltage, thereby obtaining a first storage result; and to charge an energy storage capacitor based on the first storage result, thereby obtaining a charging result, wherein the first storage result is used to characterize that the first energy storage inductor converts the input electrical energy into magnetic energy and successfully stores it, and the charging result is used to characterize that the energy storage capacitor is successfully charged, and the energy storage capacitor is an energy storage supercapacitor; A discharge unit is configured to, in response to the comparison result that the target DC bus voltage is less than the rated voltage, control the first transistor to turn on and the second transistor to turn on, thereby obtaining a second storage result; based on the second storage result, control the energy storage capacitor to discharge, thereby controlling the output voltage to be the same as the target output voltage, thereby obtaining a discharge result, wherein the second storage result is used to characterize that the second energy storage inductor successfully converts the input electrical energy into magnetic energy and stores it, and the discharge result is used to characterize that the energy storage capacitor successfully discharges.

7. An electronic device, characterized in that, include: Memory, which stores executable programs; A processor for running the program, wherein the program, when running, executes the method for determining the appropriate voltage for managing voltage sags as described in any one of claims 3 to 5.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored executable program, wherein, when the executable program is executed, it controls the device in which the storage medium is located to perform the adaptive voltage determination method for managing voltage sags as described in any one of claims 3 to 5.

9. A computer program product, characterized in that, Includes a computer program that, when executed by a processor, implements the method for determining the appropriate voltage for managing voltage sags according to any one of claims 3 to 5.

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