Voltage regulation method, device and computer equipment

Abstract

The present application relates to a voltage regulation method, apparatus, and computer equipment, and relates to the field of circuit parameter regulation technology. The method comprises: obtaining a voltage tracking difference of a target circuit at each moment, wherein the voltage tracking difference at each moment varies with the output voltage of the target circuit; obtaining a reference voltage at the current moment based on the output voltage of the target circuit at the previous moment and the voltage tracking difference at the current moment; and controlling the switching frequency of the target circuit at the current moment based on the current reference voltage and the output voltage at the previous moment to adjust the starting output voltage of the target circuit to the corresponding open-circuit voltage of the target circuit. This method enables a smooth transition of the starting output voltage of the target circuit to the corresponding open-circuit voltage of the target circuit, thereby ensuring the stability of the target circuit.

Description

Technical Field

[0001] The present application relates to the technical field of circuit parameter adjustment, and in particular to a voltage adjustment method, device and computer equipment. Background Art

[0002] When the load at the output end of the resonant conversion circuit is a micro-inverter with maximum power point tracking (MPPT) functional characteristics, the output of the resonant conversion circuit needs to meet the current-voltage output characteristic curve of the photovoltaic cell in order to adapt to the normal operation of the micro-inverter. Otherwise, the output voltage of the resonant conversion circuit will be continuously pulled down, causing shutdown. Therefore, in order to make the output of the resonant conversion circuit meet the current-voltage output characteristic curve of the photovoltaic cell, after the duty cycle and frequency of the resonant conversion circuit are soft-started, the output voltage of the resonant conversion circuit at no load is required to be the open-circuit voltage Uoc that meets the characteristic curve.

[0003] If the output voltage of the resonant converter circuit is directly switched to the open-circuit voltage, a frequency mutation may occur, which may cause phenomena such as resonant current spikes and voltage overshoot, thereby resulting in poor stability of the voltage regulation target circuit. Summary of the Invention

[0004] Based on this, it is necessary to provide a voltage regulation method, device and computer equipment to address the above technical problems, support the target circuit to smoothly transition to the circuit voltage, and improve the stability of the target circuit.

[0005] In a first aspect, the present application provides a voltage regulation method, the method comprising:

[0006] Obtaining the voltage tracking difference of the target circuit at each moment, where the voltage tracking difference at each moment changes with the output voltage of the target circuit at each moment;

[0007] Obtain the reference voltage at the current moment based on the output voltage of the target circuit at the previous moment and the voltage tracking difference at the current moment;

[0008] Based on the reference voltage at the current moment and the output voltage at the previous moment, the switching frequency of the target circuit at the current moment is controlled to adjust the initial output voltage of the target circuit to the open circuit voltage corresponding to the target circuit.

[0009] In one embodiment, obtaining the voltage tracking difference of the target circuit at each moment includes:

[0010] Determine the voltage change difference at each moment based on the frequency mutation tolerance of the target circuit, the output voltage of the target circuit at the previous moment, the open-circuit voltage, and the initial output voltage;

[0011] Determine the fixed voltage difference at each moment based on the frequency mutation tolerance of the target circuit;

[0012] According to the voltage fixed difference and the voltage change difference, the voltage tracking difference at each moment is obtained;

[0013] The initial output voltage is the output voltage of the target circuit at the end of the soft start.

[0014] In one embodiment, determining the voltage change difference at each moment based on the frequency mutation tolerance of the target circuit, the output voltage of the target circuit at a previous moment, the open-circuit voltage, and the initial output voltage at each moment includes:

[0015] obtaining an intermediate voltage value between the initial output voltage and the open circuit voltage, and an average voltage difference between the initial output voltage and the open circuit voltage;

[0016] Obtaining a first difference value of the target circuit at each moment based on the output voltage and the intermediate voltage value of the target circuit at each moment before the target circuit;

[0017] obtaining a ratio between the first difference and the average voltage difference;

[0018] determining a second difference between the predetermined value and the ratio;

[0019] The voltage change difference at each moment is obtained according to the second difference, the preset proportional coefficient and the frequency mutation tolerance.

[0020] In one embodiment, the process of determining the frequency mutation tolerance includes:

[0021] Performing a performance test on the target circuit according to the initial switching frequency of the target circuit and a preset frequency increment to obtain a performance test result;

[0022] If the performance test result of the target circuit corresponding to the first target switching frequency does not meet the preset requirements, the frequency mutation tolerance is determined based on the target switching frequency, the initial switching frequency, and the preset frequency increment.

[0023] In one embodiment, determining the fixed voltage difference at each moment according to the frequency mutation tolerance of the target circuit includes:

[0024] The voltage fixed difference is determined according to the ratio of the frequency mutation tolerance and the preset proportional coefficient of the closed-loop control.

[0025] In one embodiment, obtaining a voltage tracking difference at each moment based on the voltage fixed difference and the voltage changing difference includes:

[0026] The voltage fixed difference and the voltage changing difference are weighted to obtain the voltage tracking difference at each moment.

[0027] In one embodiment, the previous moment is not the soft-start end moment of the target circuit; and controlling the switching frequency of the target circuit at the current moment based on the reference voltage at the current moment and the output voltage at the previous moment includes:

[0028] Obtaining a third difference between the output voltage at a previous moment and the reference voltage at a current moment, and fusing the third difference with a preset proportional coefficient to obtain a first switching frequency;

[0029] Obtaining a second switching frequency according to the third difference, a preset integral coefficient, and the switching frequency at a previous moment;

[0030] The first switching frequency and the second switching frequency are superimposed to obtain the switching frequency of the target circuit at the current moment.

[0031] In one embodiment, obtaining the second switching frequency according to the third difference, a preset integral coefficient, and the switching frequency at the previous moment includes:

[0032] The third difference is fused with the preset integral coefficient, and the fused result is superimposed on the switching frequency at the previous moment to obtain the second switching frequency.

[0033] In a second aspect, the present application further provides a voltage regulating device, comprising:

[0034] A voltage tracking acquisition module is used to obtain the voltage tracking difference of the target circuit at each moment. The voltage tracking difference at each moment changes with the output voltage of the target circuit at each moment.

[0035] A reference voltage determination module is used to obtain a reference voltage at a current moment based on a voltage tracking difference between the target circuit's output voltage at a previous moment and the current moment;

[0036] The switching frequency determination module is used to control the switching frequency of the target circuit at the current moment based on the reference voltage at the current moment and the output voltage at the previous moment, so as to adjust the starting output voltage of the target circuit to the open circuit voltage corresponding to the target circuit.

[0037] In a third aspect, the present application further provides a computer device comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the method in any one of the embodiments of the first aspect are implemented.

[0038] The voltage regulation method, apparatus, and computer device described above obtain a voltage tracking difference at each moment of the target circuit, obtain a reference voltage at the current moment based on the target circuit's output voltage at the previous moment and the voltage tracking difference at the current moment, and control the switching frequency of the target circuit at the current moment based on the current reference voltage and the output voltage at the previous moment to adjust the target circuit's initial output voltage to the target circuit's corresponding open-circuit voltage. The voltage tracking difference at each moment gradually changes with the target circuit's output voltage at each moment. Thus, the voltage tracking difference at each moment is dynamically determined based on the output voltage at each moment, and the reference voltage of the target circuit at different moments is gradually and dynamically determined. The switching frequency of the target circuit at the current moment is gradually and dynamically adjusted based on the current reference voltage and the output voltage at the previous moment, thereby achieving gradual adjustment of the output voltage. This ensures that the target circuit's output voltage is less susceptible to frequency fluctuations, excessively rapid voltage changes, or overvoltage during its transition from the target circuit's output voltage to the open-circuit voltage, resulting in a smooth transition from the target circuit's initial output voltage to the target circuit's corresponding open-circuit voltage, which is beneficial to the stability of the target circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments of the present application or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying any creative work.

[0040] Figure 1 Schematic diagram of a circuit topology structure of a voltage regulation method in one embodiment;

[0041] Figure 2 is a schematic diagram of a circuit topology of a target circuit in one embodiment;

[0042] Figure 3 Schematic diagram of the output voltage control loop of the target circuit in one embodiment;

[0043] Figure 4 1 is a flow chart of a voltage regulation method according to an embodiment;

[0044] Figure 5 1 is a flow chart of a voltage tracking difference determination step in one embodiment;

[0045] Figure 6 1 is a flow chart of steps for determining the upper limit of the switching frequency and the final value of the switching frequency soft start of the target circuit in one embodiment;

[0046] Figure 7Schematic diagram of a photovoltaic simulation curve of a target circuit in one embodiment;

[0047] Figure 8a Schematic diagram of the inductor current variation curve of the target circuit in the prior art;

[0048] Figure 8b Schematic diagram of a switching frequency variation curve of a target circuit in the prior art;

[0049] Figure 8c Schematic diagram of a duty cycle variation curve of a target circuit in the prior art;

[0050] Figure 8d Schematic diagram of output voltage variation curve of target circuit in prior art;

[0051] Figure 9a is a schematic diagram of an inductor current variation curve of a target circuit in one embodiment;

[0052] Figure 9b Schematic diagram of a switching frequency variation curve of a target circuit in one embodiment;

[0053] Figure 9c FIG1 is a schematic diagram of a duty cycle variation curve of a target circuit in one embodiment;

[0054] Figure 9d Schematic diagram of an output voltage variation curve of a target circuit in one embodiment;

[0055] Figure 10 is a structural block diagram of a voltage regulating device in one embodiment;

[0056] Figure 11 FIG. 1 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0058] The technical context of the embodiments of the present application is described below.

[0059] In the battery field, the mathematical model of solar photovoltaic cells is applied to the resonant conversion circuit to simulate the output characteristics of the solar cell, so that the load can operate under maximum power point tracking conditions, thereby realizing specific functional testing.

[0060] See Figure 1 , Figure 1 A schematic diagram of the circuit topology structure of the voltage regulation method provided in an embodiment of the present application. Figure 1 In this scheme, the DC source module is the energy source, typically a battery. The resonant converter circuit is the energy conversion module, used to convert the DC source output voltage into a voltage suitable for the maximum power point tracking module. The maximum power point tracking module is an energy-consuming load with maximum power point tracking functionality. In practical applications, since the load has maximum power point tracking functionality, the resonant converter circuit must have the voltage and current output characteristics of a solar photovoltaic cell.

[0061] Furthermore, in order to achieve the voltage and current output characteristics of the solar photovoltaic cell in the resonant conversion circuit, the mathematical model of the solar photovoltaic cell (i.e., the photovoltaic simulation curve) needs to be applied to the resonant conversion circuit. Figure 2 , Figure 2 This is a circuit topology diagram of the resonant conversion circuit. Figure 2 In the resonant converter circuit, the input voltage V in , sampling resonant converter circuit output current I out , sampling resonant converter circuit output voltage V out In the embodiment of the present application, a reference voltage is obtained from a mathematical model of a solar photovoltaic cell, and the switching frequencies of the four switching tubes S1, S2, S3 and S4 in the resonant conversion circuit are obtained through a controller to adjust the output voltage of the circuit.

[0062] The controller is a proportional integral controller (PI) controller. Figure 3 Schematic diagram of the output voltage control loop of the resonant converter circuit, V ref Refers to obtaining I by querying the photovoltaic simulation curve out The corresponding reference voltage, V out Refers to the actual output voltage of the resonant converter circuit. The switching frequency of the resonant converter circuit is dynamically adjusted through the PI controller. To adjust the voltage gain of the resonant converter circuit, thereby controlling the output voltage of the resonant converter circuit .

[0063] Figure 3 The output voltage control strategy can be characterized by the following calculation formula:

[0064]

[0065]

[0066] in, is the preset scale factor, is the preset integral coefficient, is the integral term, For the resonant converter circuit The output voltage at the moment, for The reference voltage at that moment.

[0067] It's important to note that when used to simulate solar cells, the resonant converter circuit topology primarily replicates the nonlinear current-voltage (IV) characteristics of solar cells by combining resonant characteristics with control strategies. Resonant converter circuits require a soft start to gradually establish resonant conditions, allowing the energy in the resonant capacitor and inductor to increase steadily, avoiding transient high voltages or high currents.

[0068] Common soft-start methods include: (1) Duty cycle soft-start: gradually increase the duty cycle of the switch by 50% at a fixed frequency (target operating frequency). (2) Frequency soft-start: gradually reduce the switching frequency from a value far above the resonant frequency to the operating frequency (resonant frequency). (3) Hybrid soft-start: first perform duty cycle soft-start, then perform frequency soft-start.

[0069] Ideally, the resonant converter circuit is soft-started in the no-load state, and the output voltage corresponding to the no-load state is the open-circuit voltage U of the photovoltaic simulation curve. oc , open circuit voltage U of photovoltaic simulation curve oc is the maximum voltage value of the curve. After the resonant converter circuit soft start is completed, the switching frequency should be low, corresponding to a high voltage gain.

[0070] However, in actual application scenarios, after the target circuit is soft-started, the actual output voltage of the target circuit is often inconsistent with the open-circuit voltage. In this case, how to make the output voltage of the target circuit after soft-start gradually and smoothly transition to the open-circuit voltage is a technical problem that needs to be urgently solved in this field.

[0071] The following specific embodiments describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0072] In an exemplary embodiment, Figure 4 As shown, a voltage regulation method is provided, the method comprising the following steps:

[0073] S401 , obtaining a voltage tracking difference of a target circuit at each moment, where the voltage tracking difference at each moment varies with the output voltage of the target circuit.

[0074] The target circuit refers to a circuit with voltage and current output characteristics of a solar photovoltaic cell, which can be a resonant conversion circuit, a DC-DC conversion circuit, an inverter circuit, etc. In the embodiment of the present application, the target circuit is illustrated as a resonant conversion circuit. The specific circuit structure can be found in the aforementioned Figure 2 The topology diagram and description are not repeated here.

[0075] In the embodiment of the present application, the voltage regulation process is applied after the soft start of the target circuit is completed and the output voltage of the target circuit has not yet reached the open-circuit voltage of the target circuit. During this stage, the voltage tracking difference at each moment is determined based on the output voltage of the target circuit at each moment, and the switching frequency of the target circuit at each moment is adjusted based on the voltage tracking difference at each moment, thereby adjusting the output voltage of the target circuit at each moment and the next moment. This cycle is repeated until the output voltage of the target circuit smoothly transitions to the open-circuit voltage.

[0076] As a feasible method for determining the voltage tracking difference, the determination process can be: for any moment, the output voltage at that moment can be input into a preset voltage tracking difference model, and the input voltage value is analyzed and inferred through the voltage tracking difference model to output the voltage tracking difference corresponding to that moment.

[0077] As another feasible method for determining the voltage tracking difference, the determination process may also be: for any moment, under preset constraints, the voltage tracking difference of the target circuit at that moment is determined based on the output voltage of the target circuit at the previous moment, the control parameters of the controller, and the output voltage of the target circuit at the end of the soft start.

[0078] S402 , obtaining a reference voltage at the current moment according to the output voltage of the target circuit at the previous moment and the voltage tracking difference at the current moment.

[0079] The output voltage of the target circuit at the previous moment and the voltage tracking difference at the current moment are superimposed to obtain the reference voltage at the current moment:

[0080]

[0081] in, is the reference voltage at the output of the target circuit at time t, is the output voltage of the target circuit at time t-1, is the voltage tracking difference at time t.

[0082] S403 , based on the reference voltage at the current moment and the output voltage at the previous moment, controlling the switching frequency of the target circuit at the current moment to adjust the initial output voltage of the target circuit to the open circuit voltage corresponding to the target circuit.

[0083] It should be emphasized that in the process of adjusting the starting output voltage of the target circuit to the open-circuit voltage, in order to ensure the smoothness of the voltage change of the target circuit, the embodiment of the present application adopts multiple control cycles for gradual adjustment, for example, the switching frequency of the target circuit is adjusted once according to a preset time interval.

[0084] Based on this, at the moments corresponding to different regulation cycles, different calculation strategies are adopted to determine the switching frequency of the target circuit at the current moment.

[0085] In an embodiment of the present application, based on obtaining the voltage tracking difference of the target circuit at each moment, a reference voltage at the current moment is obtained based on the output voltage of the target circuit at the previous moment and the voltage tracking difference at the current moment. Based on the current reference voltage and the output voltage at the previous moment, the switching frequency of the target circuit at the current moment is controlled to adjust the initial output voltage of the target circuit to the corresponding open-circuit voltage of the target circuit. The voltage tracking difference at each moment gradually changes with the output voltage of the target circuit at each moment. In this way, the voltage tracking difference at each moment is dynamically determined based on the output voltage at each moment, and the reference voltage of the target circuit at different moments is gradually and dynamically determined. The switching frequency of the target circuit at the current moment is gradually and dynamically adjusted based on the current reference voltage and the output voltage at the previous moment. This allows for gradual adjustment of the output voltage, making it less likely for frequency abrupt changes, excessively rapid voltage changes, or overvoltage to occur during the transition from the output voltage of the target circuit to the open-circuit voltage. This ensures a smooth transition from the initial output voltage of the target circuit to the corresponding open-circuit voltage of the target circuit, which is beneficial to the stability of the target circuit.

[0086] As can be seen from the preceding embodiments, at any given moment, the voltage tracking difference corresponding to the target circuit at that moment is one of the important bases for determining the target circuit's reference voltage at that moment, and is crucial for adjusting the target circuit's switching frequency at that moment. Based on this, the following describes how to obtain the voltage tracking difference of the target circuit at each moment.

[0087] In an exemplary embodiment, Figure 5 As shown, the voltage tracking difference of the target circuit at each moment is obtained ,include:

[0088] S501 , determining a voltage change difference at each moment based on a frequency mutation tolerance of a target circuit, an output voltage at a previous moment, an open-circuit voltage, and an initial output voltage of the target circuit at each moment.

[0089] The initial output voltage is the output voltage of the target circuit at the end of the soft start, that is, the starting output voltage in the above embodiment.

[0090] The frequency mutation tolerance of the target circuit refers to the single adjustment upper limit of the switching frequency of the target circuit. The frequency mutation tolerance in the embodiment of the present application can be set based on an empirical value, or it can be determined by evaluating multiple candidate frequency mutation tolerances.

[0091] At any given moment, the voltage variation difference of the target circuit at that moment changes with the output voltage of the target circuit at that moment, and the relationship between the two can be characterized using a preset voltage variation difference calculation module function. Thus, the target circuit's frequency mutation tolerance, the target circuit's output voltage at that moment, the open-circuit voltage, and the initial output voltage can be input into the preset voltage variation difference calculation function to calculate the voltage variation difference of the target circuit at that moment.

[0092] S502 , determining a fixed voltage difference at each moment according to the frequency mutation tolerance of the target circuit.

[0093] It should be noted that the fixed voltage difference is a constant value greater than 0. In other words, the fixed voltage difference corresponding to different moments in the voltage regulation process is the same value.

[0094] Optionally, the fixed voltage difference may be determined based on a mapping relationship between the frequency mutation tolerance and the fixed voltage difference, or the fixed voltage difference may be calculated based on adjustment parameters of a frequency adjustment controller of the target circuit and the frequency mutation tolerance of the target circuit.

[0095] S503 , obtaining a voltage tracking difference at each moment according to the voltage fixed difference and the voltage changing difference.

[0096] At any moment, the voltage fixed difference and the voltage change difference corresponding to the target circuit at that moment are merged to obtain the voltage tracking difference of the target circuit at that moment.

[0097] In the embodiments of the present application, a voltage variation difference is determined at each moment based on the target circuit's frequency mutation tolerance, the target circuit's output voltage at the previous moment, the open-circuit voltage, and the initial output voltage. This ensures the rationality and reliability of the voltage variation difference. Furthermore, a fixed voltage difference is determined at each moment based on the target circuit's frequency mutation tolerance to ensure that the target circuit's output voltage consistently maintains an upward trend. Therefore, the voltage tracking difference at each moment, determined by comprehensively considering the fixed voltage difference and the voltage variation difference at each moment, is also reasonable and accurate.

[0098] Next, an embodiment is used to describe the frequency mutation tolerance in step S501. The determination process is described, including:

[0099] A performance test is performed on the target circuit based on the initial switching frequency and the preset frequency increment of the target circuit to obtain a performance test result. If the performance test result corresponding to the first target switching frequency of the target circuit does not meet the preset requirements, the frequency mutation tolerance is determined based on the target switching frequency, the initial switching frequency and the preset frequency increment.

[0100] Based on the initial switching frequency and preset frequency increment of the target circuit, multiple switching frequency test values ​​are determined, and the performance of the target circuit at different switching frequency test values ​​is tested in ascending order. During the test process, if the performance test result corresponding to the first target switching frequency of the target circuit does not meet the preset requirements, the difference between the target switching frequency and the initial switching frequency is obtained, and the ratio between the difference and the preset frequency increment is rounded down. Then, the product of the rounded-down result and the preset frequency increment is calculated as the frequency mutation tolerance.

[0101] The target circuit is the resonant conversion circuit, and the initial switching frequency is the lower limit of the switching frequency. (Far from the resonant frequency point, the voltage gain changes rapidly), the preset frequency increment is For example, the steps for determining the frequency mutation tolerance are explained:

[0102] First test: Control the resonant converter circuit to operate at the initial switching frequency, and set the switching frequency test value to If the drain-source voltage (VDS) peak of the switch tube does not exceed its withstand voltage value, the resonant inductor current does not exceed its saturation value, and the switch tube can achieve soft opening, then the second set of tests is carried out. Otherwise, reduce the frequency increment and retest.

[0103] Second test: Control the resonant converter circuit to operate at the initial switching frequency, and set the switching frequency test value to If the VDS peak of the switch tube does not exceed its withstand voltage, the resonant inductor current does not exceed its saturation value, and the switch tube can achieve soft opening, the third set of tests is performed. Otherwise, the frequency mutation tolerance .

[0104] The third test: Control the resonant converter circuit to work at the initial switching frequency, and set the switching frequency test value to If the VDS peak of the switch tube does not exceed its withstand voltage, the resonant inductor current does not exceed its saturation value, and the switch tube can achieve soft opening, the third set of tests is performed. Otherwise, the frequency mutation tolerance .

[0105] Nth test: Control the resonant conversion circuit to operate at the initial switching frequency, and set the switching frequency test value to , it is observed that the VDS peak of the switch tube exceeds its withstand voltage value, or the resonant inductor current exceeds its saturation value, or the switch tube cannot achieve soft opening, and the frequency mutation tolerance is obtained. .

[0106] In an embodiment of the present application, a performance test is performed on the target circuit based on the initial switching frequency and the preset frequency increment of the target circuit. When the performance test result corresponding to the first target switching frequency of the target circuit does not meet the preset requirements, the frequency mutation tolerance is determined based on the target switching frequency, the initial switching frequency and the preset frequency increment. By gradually determining the frequency mutation tolerance of the target circuit through multiple groups of tests, it is possible to avoid to a large extent problems such as circuit soft opening, excessive peak value, inductor current oversaturation, etc. during the frequency adjustment process of the target circuit, thereby ensuring the safety of the target circuit.

[0107] Next, an embodiment is used to illustrate an implementation method of step S501 in the above embodiment, which is "determining the voltage change difference at each moment based on the frequency mutation tolerance of the target circuit, the output voltage of the target circuit at the previous moment, the open-circuit voltage and the initial output voltage at each moment", including the following steps (1) to (5).

[0108] (1) Obtain the intermediate voltage value between the initial output voltage and the open-circuit voltage, and the average voltage difference between the initial output voltage and the open-circuit voltage.

[0109] Among them, the intermediate voltage value is: , the average voltage difference is: , the initial output voltage is the output voltage of the target circuit at the end of soft start. is the output voltage of the resonant converter circuit at the end of the frequency soft start, that is, the initial output voltage in the embodiment of the present application, is the open circuit voltage of the target circuit.

[0110] (2) Obtain a first difference value of the target circuit at each moment based on the output voltage and the intermediate voltage value of the target circuit at each moment before the target circuit.

[0111] Among them, the first difference is: , For the resonant converter circuit The actual output voltage at that moment.

[0112] (3) Obtain the ratio between the first difference and the average voltage difference.

[0113] (4) Determine a second difference between the preset value and the ratio.

[0114] In one embodiment, the preset value may be 1, and the difference between the preset value and the ratio is the second difference.

[0115] (5) Obtain the voltage change difference at each moment based on the second difference, the preset proportional coefficient and the frequency mutation tolerance.

[0116] Among them, taking the target circuit as a resonant conversion circuit, and the target circuit as a frequency soft start or mixed soft start as an example, the voltage change difference of the resonant conversion circuit at time t is The expression is as follows:

[0117]

[0118] In the above formula, is the frequency mutation tolerance, is the proportional coefficient of the controller, is the open circuit voltage of the target circuit.

[0119] In the embodiment of the present application, the voltage change difference The existence of the reference voltage makes the reference voltage and With the output voltage of the target circuit The switching frequency of the resonant converter circuit changes gradually, thereby achieving a smooth transition of the output voltage when simulating the photovoltaic curve during the soft start of the resonant converter circuit.

[0120] Specifically, for and The intermediate voltage value between , it can be seen that in the above loop control process, the voltage at the output end of the resonant converter circuit is In this range, the ratio As the output voltage increases, it gradually decreases. The voltage at the output end of the resonant converter circuit is When the ratio is within the interval As the output voltage increases, it gradually increases. When the voltage change value increases gradually with the increase of output voltage, When the output voltage is within the range, the voltage change value gradually decreases as the output voltage increases; in the loop control process of the resonant conversion circuit, when the output voltage is the intermediate voltage value When the voltage change value reaches the maximum value in the loop control process, it also reflects that the voltage change value changes gradually in the loop control process, rather than suddenly. and end value When the voltage change value is the minimum, it also shows that at the starting point and end point of the above loop control, the output voltage changes smoothly to avoid excessive voltage changes when the loop control starts and overvoltage at the end.

[0121] Next, an implementation of step S502 of the aforementioned embodiment, “determining a fixed voltage difference at each moment according to the frequency mutation tolerance of the target circuit,” is described through an embodiment, including:

[0122] The voltage fixed difference is determined according to the ratio of the frequency mutation tolerance and the preset proportional coefficient of the closed-loop control.

[0123] Taking the PI controller regulating the switching frequency of the target circuit as an example, the preset proportional coefficient refers to the proportional coefficient of the PI controller. The ratio between the frequency mutation tolerance and the preset proportional coefficient is calculated to obtain the voltage fixed difference.

[0124] Continuing with the target circuit as an example of a resonant converter circuit, the voltage difference of the resonant converter circuit is fixed. The expression is as follows:

[0125]

[0126] In the above formula, is the frequency mutation tolerance, The preset proportional coefficient of the controller.

[0127] Among them, the voltage fixed difference Is a fixed component that ensures the voltage change difference Has a minimum non-zero value to ensure that the output voltage of the target circuit has an increasing trend.

[0128] In an embodiment of the present application, a fixed voltage difference is determined based on the ratio of the frequency mutation tolerance and the preset proportional coefficient of the closed-loop control, and adaptive matching of the voltage adjustment amount is achieved through logical coupling between parameters, thereby improving the stability, response accuracy and robustness of the system in frequency mutation scenarios.

[0129] Next, an implementation of step S503 of the aforementioned embodiment, "obtaining a voltage tracking difference at each moment based on the fixed voltage difference and the voltage variation difference," is described through an embodiment, including:

[0130] The voltage fixed difference and the voltage changing difference are weighted to obtain the voltage tracking difference at each moment.

[0131] The voltage tracking difference of the target circuit at that moment is obtained by performing a weighted summation on the voltage fixed difference and the voltage changing difference according to a preset weighting coefficient.

[0132] Among them, the voltage tracking difference of the target circuit at time t is The expression is as follows:

[0133]

[0134]

[0135] In the above formula, 、 is the weighting coefficient, and its value range is In actual application scenarios, 、 It can be obtained by testing multiple sets of candidate weighting coefficient combinations. The testing process is:

[0136] First test: =0.1, =0.9, use the oscilloscope to observe whether the VDS peak of the switch tube or the peak value of the resonant circuit exceeds the corresponding preset value. If not, perform the next test. If so, reduce , increase ;

[0137] Second test: =0.2, =0.8, observe the VDS peak of the switch tube or the peak value of the resonant circuit through the oscilloscope. If not, perform the next test. If so, set the corresponding value of the previous test to 、 Determined as the target proportion coefficient.

[0138] Third test: =0.3, =0.7, observe the VDS peak of the switch tube or the peak value of the resonant circuit through the oscilloscope. If not, perform the next test. If so, set the corresponding value of the previous test to 、 Determined as the target proportion coefficient;

[0139] Ninth test: =0.9, =0.1, observe the VDS peak of the switch tube or the peak value of the resonant circuit through the oscilloscope. If not, perform the next test. If so, set the corresponding value of the previous test to 、 Determined as the target proportion coefficient.

[0140] In an embodiment of the present application, at any moment, the fixed voltage difference and the voltage change difference of the target circuit at that moment are weighted to obtain the voltage tracking difference of the target circuit at that moment, and support flexible adjustment of the fixed voltage difference and the voltage change difference of the target circuit at that moment, thereby improving the reliability of the voltage tracking difference of the target circuit at that moment.

[0141] In a specific embodiment, the above step S403 of “controlling the switching frequency of the target circuit at the current moment based on the reference voltage at the current moment and the output voltage at the previous moment to adjust the initial output voltage of the target circuit to the open-circuit voltage corresponding to the target circuit” is specifically as follows:

[0142] At the moment corresponding to each regulation cycle, the integral term at the current moment is determined based on the reference voltage at the current moment, the output voltage at the previous moment, and the integral coefficient of the PI controller. Then, the switching frequency at the current moment is determined based on the reference voltage at the current moment, the output voltage at the previous moment, the proportional coefficient of the controller, and the integral term at the current moment. The corresponding calculation formula is as follows:

[0143]

[0144]

[0145] in, is the preset proportional coefficient, which is the proportional coefficient in the PI controller. is the integral coefficient in the PI controller, where the proportional coefficient and the integral coefficient can be obtained using existing technology. is the integral term. For the resonant converter circuit The output voltage at the moment. for The reference voltage at the moment. Among them, the switching frequency value at the initial moment of adjustment is the switching frequency of the target circuit at the end of the soft start. ,Right now .

[0146] In an embodiment of the present application, based on the reference voltage at the current moment and the output voltage at the previous moment, the switching frequency at the current moment is obtained based on PI control, where the switching frequency at each moment corresponds to an output voltage, and when the output circuit reaches the open-circuit voltage, the voltage adjustment process is completed.

[0147] Taking the resonant converter circuit as an example, after the resonant converter circuit frequency soft start, the reference voltage soft start is performed according to the loop control voltage tracking difference, which is divided into two stages:

[0148] Phase 1: At the moment corresponding to the first adjustment cycle ( ) to perform the first PI loop control.

[0149] Among them, t=0 is the moment when the resonant converter circuit completes the frequency soft start. At this time, the resonant converter circuit is The integral term at time The switching frequency of the resonant converter circuit is completed during the frequency soft start. ,Right now The resonant converter circuit has a switching frequency of Output voltage at , This is the output voltage of the aforementioned resonant converter circuit at the end of frequency soft start. , the resonant converter circuit Voltage tracking difference at time , the resonant converter circuit Reference voltage at the moment .

[0150] Thus, according to the calculation formula of the switching frequency in the aforementioned step S403, the switching frequency of the resonant converter circuit after the first output voltage adjustment period is determined. for:

[0151]

[0152] exist At the switching frequency, the resonant converter circuit has an output voltage .

[0153] The second stage: During the second regulation cycle and each regulation cycle thereafter, multiple PI loop controls are performed until the output voltage of the resonant converter circuit reaches the open circuit voltage. .

[0154] At the moment corresponding to the tth adjustment cycle Taking loop control as an example, the third difference between the output voltage at the previous moment and the reference voltage at the current moment is obtained, and the third difference is combined with the preset proportional coefficient to obtain the first switching frequency. The corresponding expression is as follows:

[0155]

[0156] in, For the resonant converter circuit The first switching frequency at the moment, is the preset scale factor, For the resonant converter circuit The output voltage at the moment, for The reference voltage at that moment.

[0157] A second switching frequency is obtained according to the third difference, a preset integral coefficient, and the switching frequency at a previous moment.

[0158] Specifically, the third difference is fused with the preset integral coefficient, and the fused result is superimposed with the switching frequency at the previous moment to obtain the second switching frequency. The corresponding expression is as follows:

[0159]

[0160] in, is the second switching frequency at time t, is the preset integral coefficient, is the switching frequency at the previous moment, For the resonant converter circuit The output voltage at the moment, for The reference voltage at that moment.

[0161] The first switching frequency and the second switching frequency are superimposed to obtain the switching frequency of the target circuit at the current moment.

[0162] Among them, the switching frequency of the target circuit at the current moment is The expression is as follows:

[0163]

[0164] In this way, the switching frequency of the target circuit is adjusted through a proportional-integral controller (PI controller), combining the fast response characteristics of proportional control with the steady-state error elimination capability of integral control to improve the regulation efficiency and regulation accuracy of the target circuit.

[0165] The switching frequency of the target circuit at each moment There is an output voltage corresponding to this. After multiple loop controls, the final reference voltage of the resonant converter circuit is When , the reference voltage soft start of the resonant conversion circuit is completed.

[0166] In the embodiment of the present application, the startup process of the target circuit includes the following steps:

[0167] (1) Duty cycle soft start. Use the upper limit of switching frequency Perform duty cycle soft start, and after the duty cycle soft start is completed, enter frequency soft start.

[0168] At the upper limit of switching frequency Perform duty cycle soft start for fixed frequency and adjust the duty cycle from 0 to 50%.

[0169] (2) Frequency soft start. From the upper limit of switching frequency To the final value of switching frequency soft start Perform frequency soft start. After the frequency soft start is completed, the control loop integral inherits the switching frequency soft start final value. .

[0170] The fixed duty cycle is 50%, from the upper limit of the switching frequency Start to gradually reduce the frequency to the switching frequency soft start final value .

[0171] (3) Output voltage soft start, which is the process of adjusting the output voltage of the target circuit to the open circuit voltage.

[0172] Tracking the voltage difference according to the changing voltage at different times , set the reference voltage to change gradually , and then adjust the output voltage of the target circuit according to the reference value Tracking changes are made until the output voltage of the target circuit Reach the open circuit voltage of the photovoltaic simulation curve The voltage regulation process can be referred to the description of each embodiment of the voltage regulation method above, which will not be described here in detail. Given by the photovoltaic simulation curve.

[0173] In an embodiment of the present application, a hierarchical control logic is performed on the output voltage of the target circuit, and the startup process of the target circuit is decomposed into multiple orderly parameter adjustment stages to avoid electrical shock and control instability caused by a single parameter hard start, thereby improving the stability of the target circuit.

[0174] During the startup process of the target circuit above, the duty cycle soft start and frequency soft start process involve the upper limit of the switching frequency. and the switching frequency soft start final value Below, taking the target circuit as a resonant converter circuit as an example, the upper limit of the switching frequency is and soft start final value The steps for determining Figure 6 As shown, the following steps are included:

[0175] S601: Determine the output voltage range.

[0176] According to the photovoltaic simulation curve, the target output voltage minimum value and the target output voltage maximum value are determined, and then the target output voltage range is determined.

[0177] The minimum target output voltage is 60%-70% of the maximum power point voltage in the photovoltaic simulation curve. The maximum target output voltage is the open circuit voltage of the photovoltaic simulation curve. .

[0178] S602: Determine the upper limit of the switching frequency.

[0179] The voltage output from the DC source module to the resonant conversion circuit has a certain range. During the frequency modulation of the resonant conversion circuit, the frequency modulation range of the switching frequency is: 70% of the resonant frequency of the resonant cavity of the resonant conversion circuit to 130% of the resonant frequency of the resonant cavity. During the frequency modulation process, the output voltage of the resonant conversion circuit at each switching frequency is recorded to obtain the minimum output voltage of the resonant conversion circuit during the frequency modulation process and the upper limit of the switching frequency corresponding to the minimum output voltage. Wherein, when the output voltage of the target circuit of the resonant conversion circuit is at the maximum value within the output voltage range of the DC source module, the output voltage of the target circuit of the resonant conversion circuit is at the minimum value.

[0180] S603: Determine the lower limit of the switching frequency.

[0181] The voltage output from the DC source module to the resonant conversion circuit has a certain range. During the frequency modulation of the resonant conversion circuit, the frequency modulation range of the switching frequency is: 130% of the resonant frequency of the resonant cavity of the resonant conversion circuit to 70% of the resonant frequency of the resonant cavity. During the frequency modulation process, the output voltage of the resonant conversion circuit at each switching frequency is recorded, and the maximum output voltage of the resonant conversion circuit during the frequency modulation process and the lower limit of the switching frequency corresponding to the maximum output voltage are obtained. Wherein, when the output voltage of the target circuit of the resonant conversion circuit is at the minimum value within the output voltage range of the DC source module, the output voltage of the target circuit of the resonant conversion circuit is at the maximum value.

[0182] S604: Determine the final soft-start value of the switching frequency.

[0183] Switching frequency soft start final value The calculation expression is:

[0184]

[0185] Where, is the frequency margin, and its value range is [10%, 20%].

[0186] In the embodiment of the present application, when the output voltage of the DC source module is at its maximum value, the output voltage can reach the open circuit voltage of the photovoltaic simulation curve under the condition of a small voltage gain. , it can be satisfied that under any input voltage, the output voltage will not be greater than , to prevent output overvoltage; it is also necessary to consider that when the output voltage of the DC source module is at its maximum value, a certain frequency margin should be left , so that after the frequency soft start is completed, the output voltage is always less than the open circuit voltage of the photovoltaic simulation curve , preparing for the aforementioned output voltage soft start process.

[0187] In the startup process of the target circuit described above, the duty cycle soft start, frequency soft start, and output voltage soft start processes involve determining soft start parameters, such as the target output voltage range and open-circuit voltage, based on the photovoltaic simulation curve. The following describes the process of determining the parameters involved in the photovoltaic simulation curve, using the target circuit simulating a silicon solar cell as an example.

[0188] First, the mathematical model of the IV characteristic curve of silicon solar cells is explained and represented by the following formula:

[0189]

[0190]

[0191]

[0192] Where, is the short-circuit current, is the open circuit voltage, is the open circuit voltage, 、 is the intermediate calculation parameter, is the maximum power point current, is the maximum power point voltage, let , , 、 The calculation can be simplified as follows:

[0193]

[0194]

[0195] Then, the steps for determining the parameters of the photovoltaic simulation curve are as follows:

[0196] Considering the maximum power point voltage of the photovoltaic panel and open circuit voltage The ratio is usually around 0.8, and the maximum power point current and short-circuit current The ratio is about 0.8. In the embodiment of the present application, the ratio of the maximum power point voltage to the open circuit voltage and the ratio of the maximum power point current to the short circuit current are set to be: 、 .

[0197] Rated power of resonant converter circuit (Maximum output power of resonant converter circuit) and rated current (the maximum output current of the resonant converter circuit) as the ratio of the maximum power point voltage , to ensure that the resonant conversion circuit can achieve rated power output:

[0198]

[0199] In determining Based on the open circuit voltage in the photovoltaic simulation curve and maximum power point voltage The open circuit voltage can be determined by the relationship :

[0200]

[0201] Maximum power point current in photovoltaic simulation curve With set power (less than or equal to rated power) related to:

[0202]

[0203] In determining Based on the short-circuit current in the photovoltaic simulation curve and maximum power point current The short-circuit current can be determined by the relationship :

[0204]

[0205] So far, 、 、 、 It has been confirmed that the photovoltaic simulation curve can be constructed, such as Figure 7 As shown, Figure 7 Schematic diagram of photovoltaic simulation curve of the target circuit.

[0206] Based on the aforementioned embodiments, a full-cycle startup method for a target circuit is described. Furthermore, to verify the voltage regulation performance of the startup method provided by the embodiments of this application, a resonant converter circuit was used as an example of the target circuit. Circuit voltage regulation was performed using the voltage regulation method of this application and a voltage regulation method in related art. Circuit simulation experiments were also conducted from two dimensions: switching frequency and output voltage.

[0207] When the voltage regulation method of directly cutting into the control loop in the related art is adopted, the parameter curve diagram of the target circuit is as follows: Figure 8a 、 Figure 8b 、 Figure 8c and Figure 8d shown. Figure 8a Schematic diagram showing the change of the inductor current of the target circuit over time, where the horizontal axis represents time and the vertical axis represents the inductor current of the resonant inductor of the target circuit. Figure 8bThe curve L1 in FIG. 1 is a schematic diagram of a curve showing how the switching frequency of the target circuit changes with time, where the horizontal axis is time and the vertical axis is the switching frequency of the target circuit. Figure 8c The curve L2 in FIG. 1 is a schematic diagram of a curve showing the switching duty cycle of the target circuit changing with time, where the horizontal axis is time and the vertical axis is the duty cycle of the target circuit. Figure 8d Schematic diagram of the output voltage and reference voltage of the target circuit changing with time. Figure 8d The L3 in the figure represents the curve diagram of the output voltage changing with time. Figure 8d L4 in the figure represents the curve diagram of the reference voltage changing with time. Figure 8a 、 Figure 8b 、 Figure 8c and Figure 8d It can be seen that if the control loop (resonant conversion circuit) is directly switched on, the frequency will change suddenly due to the large error, which will cause a local resonant current spike; further, the error integral saturation will occur, resulting in voltage overshoot.

[0208] When the voltage regulation method in the embodiment of the present application is adopted, the parameter curve diagram of the target circuit is as follows: Figure 9a 、 Figure 9b 、 Figure 9c and Figure 9d shown. Figure 9a This is a schematic diagram showing how the inductor current of the resonant inductor of the target circuit changes with time, where the horizontal axis represents time and the vertical axis represents the inductor current of the target circuit. Figure 9b The curve L5 in FIG. 5 is a schematic diagram of a curve showing how the switching frequency of the target circuit changes with time, where the horizontal axis is time and the vertical axis is the switching frequency. Figure 9c The curve L6 in FIG. 1 is a schematic diagram of a curve showing the switching duty cycle of the target circuit changing with time, where the horizontal axis is time and the vertical axis is the duty cycle. Figure 9d Schematic diagram of the output voltage and reference voltage of the target circuit changing with time. Figure 9d The L7 in the figure represents the curve diagram of the output voltage changing with time. Figure 9d L8 in the figure represents the curve diagram of the reference voltage changing with time. Figure 9a 、 Figure 9b 、 Figure 9c and Figure 9d It can be seen that by adopting the voltage regulation method in the embodiment of the present application, the output voltage change at each moment of the output voltage of the target current at the final value of the frequency soft start is small, there is basically no frequency mutation, and the output voltage smoothly transitions to the open-circuit voltage of the photovoltaic simulation curve, without voltage overshoot and resonant current spike.

[0209] Combined with the above experimental comparison results, it can be explained that the voltage regulation method provided in the embodiment of the present application can make the target circuit have a smooth change in output voltage during the startup process of the resonant conversion circuit within the full input voltage range, without output overvoltage; the resonant current changes smoothly during the startup process of the resonant conversion circuit without current spikes; and after the resonant conversion circuit frequency soft start is completed, it switches smoothly to the photovoltaic simulation algorithm control loop, and the switching frequency changes smoothly.

[0210] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0211] Based on the same inventive concept, embodiments of the present application further provide a voltage regulating device for implementing the aforementioned voltage regulating method. The solution provided by this device is similar to the solution described in the aforementioned method. Therefore, the specific limitations of one or more voltage regulating device embodiments provided below can be found in the above-described limitations of the voltage regulating method and are not further elaborated here.

[0212] In an exemplary embodiment, Figure 10 As shown, a voltage regulation device is provided, including: a voltage tracking and acquisition module 1001, a reference voltage determination module 1002 and a switching frequency determination module 1003, wherein:

[0213] The voltage tracking acquisition module 1001 is used to obtain the voltage tracking difference of the target circuit at each moment, where the voltage tracking difference at each moment varies with the output voltage of the target circuit at each moment;

[0214] A reference voltage determination module 1002 is configured to obtain a reference voltage at a current moment based on a voltage tracking difference between the target circuit's output voltage at a previous moment and the current moment;

[0215] The switching frequency determination module 1003 is used to control the switching frequency of the target circuit at the current moment based on the reference voltage at the current moment and the output voltage at the previous moment, so as to adjust the initial output voltage of the target circuit to the open circuit voltage corresponding to the target circuit.

[0216] In an exemplary embodiment, the voltage tracking acquisition module 1001 includes: a variation difference determination unit, a fixed difference determination unit, and a tracking difference determination unit, wherein:

[0217] a change difference determination unit, configured to determine a voltage change difference at each moment based on a frequency mutation tolerance of the target circuit, an output voltage at a previous moment, an open-circuit voltage, and an initial output voltage of the target circuit at each moment;

[0218] A fixed difference determination unit, configured to determine a fixed voltage difference at each moment according to a frequency mutation tolerance of a target circuit;

[0219] The tracking difference determination unit is used to obtain the voltage tracking difference at each moment according to the voltage fixed difference and the voltage variation difference; wherein the initial output voltage is the output voltage of the target circuit at the end of the soft start.

[0220] In an exemplary embodiment, the change difference determination unit includes: a voltage value calculation subunit, a first difference calculation subunit, a voltage ratio calculation subunit, a second difference calculation subunit, and a voltage change value determination subunit, wherein:

[0221] a voltage value calculation subunit, configured to obtain an intermediate voltage value between the initial output voltage and the open circuit voltage, and an average voltage difference between the initial output voltage and the open circuit voltage;

[0222] a first difference calculation unit, configured to obtain a first difference value of the target circuit at each moment based on the output voltage and the intermediate voltage value of the target circuit at each moment before the target circuit;

[0223] a voltage ratio calculation subunit, configured to obtain a ratio between the first difference and the average voltage difference;

[0224] a second difference calculation subunit, configured to determine a second difference between the preset value and the ratio;

[0225] The voltage change value determining subunit is used to obtain the voltage change difference at each moment according to the second difference, a preset proportional coefficient and a frequency mutation tolerance.

[0226] In an exemplary embodiment, the voltage regulation device further includes a frequency mutation tolerance determination module, which is used to perform a performance test on the target circuit based on the initial switching frequency and the preset frequency increment of the target circuit to obtain a performance test result; if the performance test result corresponding to the first target switching frequency of the target circuit does not meet the preset requirements, the frequency mutation tolerance is determined based on the target switching frequency, the initial switching frequency and the preset frequency increment.

[0227] In an exemplary embodiment, the fixed difference determination unit is further configured to determine the voltage fixed difference according to a ratio of a frequency mutation tolerance and a preset proportional coefficient of the closed-loop control.

[0228] In an exemplary embodiment, the tracking difference determining unit is further configured to weight the voltage fixed difference and the voltage variation difference to obtain the voltage tracking difference at that moment.

[0229] In an exemplary embodiment, the previous moment is not the target circuit soft start end moment; the switching frequency determination module 1003 includes: a first switching frequency acquisition unit, a second switching frequency acquisition unit and a switching frequency superposition unit, wherein:

[0230] a first switching frequency acquisition unit, configured to acquire a third difference between the output voltage at a previous moment and the reference voltage at a current moment, and fuse the third difference with a preset proportional coefficient to obtain a first switching frequency;

[0231] a second switching frequency obtaining unit, configured to obtain a second switching frequency according to the third difference, a preset integral coefficient, and the switching frequency at a previous moment;

[0232] The switching frequency superposition unit is used to superimpose the first switching frequency and the second switching frequency to obtain the switching frequency of the target circuit at the current moment.

[0233] In an exemplary embodiment, the second switching frequency acquiring unit is further configured to fuse the third difference with a preset integral coefficient, and superimpose the fused result with the switching frequency at the previous moment to obtain the second switching frequency.

[0234] Each module in the voltage regulation device described above may be implemented in whole or in part through software, hardware, or a combination thereof. Each module may be embedded in or independent of a processor in a computer device in hardware form, or may be stored in a memory in the computer device in software form, so that the processor can call and execute the corresponding operations of each module.

[0235] In an exemplary embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as shown in FIG. Figure 11As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, abbreviated as I / O) and a communication interface. The processor, memory and input / output interface are connected via a system bus, and the communication interface is connected to the system bus via the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and computer program in the non-volatile storage medium. The database of the computer device is used to store voltage regulation data. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, a voltage regulation method is implemented.

[0236] Those skilled in the art will understand that Figure 11 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0237] In an exemplary embodiment, a computer device is provided, including a memory and a processor. The memory stores a computer program, and the processor implements the steps in the above method embodiments when executing the computer program.

[0238] In an exemplary embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0239] In an exemplary embodiment, a computer program product is provided, including a computer program. When the computer program is executed by a processor, the steps in the above method embodiments are implemented.

[0240] It should be noted that the data involved in this application (including but not limited to data used for analysis, stored data, displayed data, etc.) are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0241] Those skilled in the art will understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. In particular, any reference to memory, database, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The databases involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the various embodiments provided herein may be, but are not limited to, general-purpose processors, central processing units (CPUs), graphics processing units (GPUs), digital signal processors (DSPs), programmable logic devices (PLDs), quantum computing-based data processing logic devices, artificial intelligence (AI) processors, and the like.

[0242] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0243] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A voltage regulation method, characterized in that: The method comprises: Determining a voltage change difference at each moment based on a frequency mutation tolerance of the target circuit, an output voltage of the target circuit at a previous moment, an open-circuit voltage corresponding to the target circuit, and an initial output voltage; the initial output voltage being the output voltage of the target circuit at the end of soft start; Determining a fixed voltage difference at each moment according to the frequency mutation tolerance of the target circuit; Obtaining a voltage tracking difference at each moment according to the voltage fixed difference and the voltage variation difference; wherein the voltage tracking difference at each moment varies with the output voltage of the target circuit; Obtaining a reference voltage at the current moment based on an output voltage of the target circuit at a moment before the current moment and a voltage tracking difference at the current moment; Based on the reference voltage at the current moment and the output voltage at the previous moment, the switching frequency of the target circuit at the current moment is controlled to adjust the initial output voltage of the target circuit to the open circuit voltage corresponding to the target circuit.

2. The method according to claim 1, characterized in that The determining of the voltage change difference at each moment according to the frequency mutation tolerance of the target circuit, the output voltage of the target circuit at a previous moment at each moment, the open circuit voltage, and the initial output voltage includes: obtaining an intermediate voltage value between the initial output voltage and the open circuit voltage, and an average voltage difference between the initial output voltage and the open circuit voltage; Obtaining a first difference value of the target circuit at each moment according to the output voltage of the target circuit at a previous moment and the intermediate voltage value at each moment; Obtaining a ratio between the first difference and the average voltage difference; determining a second difference between the predetermined value and the ratio; The voltage change difference at each moment is obtained according to the second difference, the preset proportional coefficient and the frequency mutation tolerance.

3. The method according to claim 1, characterized in that The process of determining the frequency mutation tolerance includes: Performing a performance test on the target circuit according to the initial switching frequency of the target circuit and a preset frequency increment to obtain a performance test result; If the performance test result of the target circuit corresponding to the first target switching frequency does not meet the preset requirement, the frequency mutation tolerance is determined according to the target switching frequency, the initial switching frequency and the preset frequency increment.

4. The method according to any one of claims 1 to 3, characterized in that The step of determining the fixed voltage difference at each moment according to the frequency mutation tolerance of the target circuit includes: The voltage fixed difference is determined according to the ratio of the frequency mutation tolerance and a preset proportional coefficient of the closed-loop control.

5. The method according to any one of claims 1 to 3, characterized in that The step of obtaining a voltage tracking difference at each moment according to the fixed voltage difference and the voltage variation difference includes: The voltage fixed difference and the voltage change difference are weighted to obtain the voltage tracking difference at each moment.

6. The method according to claim 1, characterized in that The previous moment is not the soft-start end moment of the target circuit; and controlling the switching frequency of the target circuit at the current moment based on the reference voltage at the current moment and the output voltage at the previous moment includes: Obtaining a third difference between the output voltage at the previous moment and the reference voltage at the current moment, and fusing the third difference with a preset proportional coefficient to obtain a first switching frequency; Obtaining a second switching frequency according to the third difference, a preset integral coefficient, and the switching frequency at the previous moment; The first switching frequency and the second switching frequency are superimposed to obtain the switching frequency of the target circuit at the current moment.

7. The method according to claim 6, characterized in that Obtaining the second switching frequency according to the third difference, a preset integral coefficient, and the switching frequency at the previous moment includes: The third difference is fused with the preset integral coefficient, and the fused result is superimposed with the switching frequency at the previous moment to obtain the second switching frequency.

8. A voltage regulating device, characterized in that: The device comprises: a voltage tracking acquisition module, configured to determine a voltage variation difference at each moment based on a frequency mutation tolerance of a target circuit, an output voltage of the target circuit at a moment before each moment, an open-circuit voltage corresponding to the target circuit, and an initial output voltage; the initial output voltage being the output voltage of the target circuit at the end of soft start; determining a fixed voltage difference at each moment based on the frequency mutation tolerance of the target circuit; acquiring a voltage tracking difference at each moment based on the fixed voltage difference and the voltage variation difference; the voltage tracking difference at each moment varying with the output voltage of the target circuit; a reference voltage determination module, configured to obtain a reference voltage at a current moment based on an output voltage of the target circuit at a moment before the current moment and a voltage tracking difference at the current moment; A switching frequency determination module is used to control the switching frequency of the target circuit at the current moment based on the reference voltage at the current moment and the output voltage at the previous moment, so as to adjust the starting output voltage of the target circuit to the open-circuit voltage corresponding to the target circuit.

9. The device according to claim 8, characterized in that The device comprises: A frequency mutation tolerance determination module is used to perform a performance test on the target circuit based on the initial switching frequency and the preset frequency increment of the target circuit to obtain a performance test result; if the performance test result corresponding to the first target switching frequency of the target circuit does not meet the preset requirements, the frequency mutation tolerance is determined based on the target switching frequency, the initial switching frequency and the preset frequency increment.

10. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

Images