Control method for accurately adjusting voltage of voltage regulator

Abstract

The invention relates to the technical field of voltage regulation, and discloses a control method for accurately regulating voltage by a voltage regulator, which comprises the following steps of: determining equipment to be regulated, and connecting the equipment to be regulated with hardware of an electrical control system; wherein the hardware comprises an adjusting switch and a three-phase adjusting motor; determining a target output voltage of the to-be-adjusted device, and collecting an actual output voltage corresponding to the to-be-adjusted device at the initial moment; comparing the actual output voltage with the target output voltage, and determining a voltage control strategy of the to-be-adjusted equipment according to a comparison result; executing a voltage control strategy, and controlling an adjusting switch and a three-phase adjusting motor to adjust the actual output voltage; and when the actual output voltage of the to-be-adjusted equipment reaches the target output voltage, correcting the voltage deviation caused by the motor inertia of the three-phase adjusting motor by adopting a periodic on-off control method, and obtaining a stable output voltage. According to the invention, accurate and rapid actual output voltage regulation is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of voltage regulation, and in particular to a control method for a voltage regulator to accurately regulate voltage. Background Art

[0002] In the engineering field, it is often necessary to accurately control the output voltage to meet specific requirements, such as 400V, 450V, 230V, etc. Common solutions include using a converter to adjust the output voltage or utilizing a voltage regulator.

[0003] However, achieving the desired output voltage using a converter is often costly. Relying on a voltage regulator for output voltage adjustment can be difficult due to factors such as the inertia of the three-phase regulator motor, making it difficult to accurately achieve the desired voltage. In these cases, multiple manual adjustments are often required, making achieving the desired result challenging.

[0004] Therefore, it is necessary to design a control method for a voltage regulator to accurately adjust the voltage to solve the problems existing in the current technology. Summary of the Invention

[0005] In view of this, the present invention proposes a control method for a voltage regulator to accurately adjust voltage, aiming to provide a solution that can reduce costs and achieve accurate voltage adjustment.

[0006] The present invention proposes a control method for a voltage regulator to accurately adjust voltage, comprising:

[0007] Determine the device to be adjusted, and connect the device to be adjusted with the hardware of the electrical control system; wherein the hardware includes a regulating switch, a three-phase regulating motor and a voltage regulator;

[0008] Determining a target output voltage of the device to be adjusted, and collecting an actual output voltage corresponding to the device to be adjusted at an initial moment; comparing the actual output voltage with the target output voltage, and determining a voltage control strategy for the device to be adjusted based on the comparison result;

[0009] Execute the voltage control strategy, control the regulating switch and the three-phase regulating motor to adjust the actual output voltage; when the actual output voltage of the device to be adjusted reaches the target output voltage, use a periodic on-off control method to correct the voltage deviation caused by the motor inertia of the three-phase regulating motor, and obtain a stable output voltage.

[0010] Furthermore, the voltage control strategy includes controlling the state of the regulating switch and the direction of rotation of the three-phase regulating motor.

[0011] Furthermore, when determining the voltage control strategy of the device to be adjusted according to the comparison result, it includes:

[0012] When the actual output voltage is less than the target output voltage, the regulating switches are respectively adjusted to a conductive state to rotate the three-phase regulating motor in a forward direction;

[0013] When the actual output voltage rises to 0.95 times the target output voltage, the preliminary voltage regulation is completed, and 0.95 times the target output voltage is used as the preliminary regulation value.

[0014] Furthermore, when determining the voltage control strategy of the device to be adjusted according to the comparison result, the method further includes:

[0015] When the actual output voltage is greater than the target output voltage, the regulating switches are respectively adjusted to a conductive state, and the three-phase regulating motor is rotated in the reverse direction;

[0016] When the actual output voltage drops to 1.05 times the target output voltage, the preliminary voltage regulation is completed, and 1.05 times the target output voltage is used as the preliminary regulation value.

[0017] Furthermore, the calculation formula of the preliminary adjustment value is:

[0018]

[0019] Among them, U b Indicates the initial adjustment value; U o Indicates the actual output voltage; U g is the target output voltage.

[0020] Furthermore, when a periodic on-off control method is used to correct the voltage deviation caused by the motor inertia of the three-phase regulating motor and obtain a stable output voltage, the method includes:

[0021] A cycle T is set, and in each cycle T, the three-phase regulating motor is controlled to be on and off;

[0022] Analyzing the voltage deviation to obtain the voltage deviation characteristic value, and determining the initial on-off time ratio of the three-phase regulating motor according to the voltage deviation characteristic value;

[0023] Obtaining the standard deviation of the voltage deviation within n consecutive cycles and recording it as the voltage standard deviation; wherein n ≥ 2, and n is an integer;

[0024] Determining whether to adjust the initial on-off time ratio according to the voltage standard deviation;

[0025] If yes, calculate the voltage change rate between the current cycle and the previous cycle, and obtain the target adjustment time, determine the adjustment coefficient of the initial on-off time ratio according to the voltage change rate and the target adjustment time, and obtain the final on-off time ratio;

[0026] The on and off of the three-phase regulating motor is controlled according to the final on-off time ratio until the voltage deviation is less than the voltage deviation threshold.

[0027] Furthermore, when determining the initial on-off time ratio of the three-phase regulating motor according to the voltage deviation characteristic value, it includes:

[0028] Comparing the voltage deviation characteristic value with a first voltage deviation characteristic value and a second voltage deviation characteristic value, and determining an initial on-off time ratio of the three-phase regulating motor according to the comparison result; wherein the first voltage deviation characteristic value is smaller than the second voltage deviation characteristic value;

[0029] When the voltage deviation characteristic value is less than or equal to the first voltage deviation characteristic value, determining the initial on-off time ratio of the three-phase regulating motor to be the first on-off time ratio;

[0030] When the voltage deviation characteristic value is greater than the first voltage deviation characteristic value and less than or equal to the second voltage deviation characteristic value, determining the initial on-off time ratio of the three-phase regulating motor to be the second on-off time ratio;

[0031] When the voltage deviation characteristic value is greater than the second voltage deviation characteristic value, the initial on-off time ratio of the three-phase regulating motor is determined to be a third on-off time ratio.

[0032] Furthermore, when determining whether to adjust the initial on-off time ratio according to the voltage standard deviation, the method includes:

[0033] Comparing the voltage standard deviation with a voltage standard deviation threshold, and determining whether to adjust the initial on-off time ratio according to the comparison result;

[0034] When the voltage standard deviation is less than or equal to the voltage standard deviation threshold, determining not to adjust the initial on-off time ratio;

[0035] When the voltage standard deviation is greater than the voltage standard deviation threshold, it is determined that the initial on-off time ratio is to be adjusted.

[0036] Furthermore, determining the adjustment coefficient of the initial on-off time ratio according to the voltage change rate and the target adjustment time, and obtaining the final on-off time ratio, includes:

[0037] constructing the voltage change rate and the target adjustment time into an adjustment feature group;

[0038] Comparing the adjustment feature group with the historical adjustment group, and determining the adjustment coefficient of the initial on-off time ratio according to the comparison result;

[0039] When there is a historical adjustment feature group identical to the adjustment feature group in the historical adjustment group, the historical adjustment coefficient corresponding to the historical adjustment feature group is used as the adjustment coefficient, and the product of the historical adjustment coefficient and the initial on-off time ratio is used as the final on-off time ratio;

[0040] When there is no historical adjustment feature group identical to the adjustment feature group in the historical adjustment group, the overlap between the adjustment feature group and the historical adjustment group is calculated, and the maximum overlap is extracted; the adjustment coefficient is determined based on the maximum overlap, and the product value of the adjustment coefficient and the initial on-off time ratio is used as the final on-off time ratio.

[0041] Furthermore, when determining the adjustment coefficient according to the maximum overlap, it includes:

[0042] Comparing the maximum overlap with a first maximum overlap and a second maximum overlap, and determining the adjustment coefficient according to the comparison result; wherein the first maximum overlap is smaller than the second maximum overlap;

[0043] When the maximum overlap is less than or equal to the first maximum overlap, determining the adjustment coefficient to be the first adjustment coefficient;

[0044] When the maximum overlap is greater than the first maximum overlap and less than or equal to the second maximum overlap, determining the adjustment coefficient to be a second adjustment coefficient;

[0045] When the maximum overlap is greater than the second maximum overlap, the adjustment coefficient is determined to be a third adjustment coefficient.

[0046] Compared with the prior art, the present invention has the following beneficial effects: The control method for precisely adjusting the voltage of a voltage regulator provided by the present invention is cost-effective by precisely adjusting the actual output voltage, making it particularly suitable for applications where frequent adjustment of the actual output voltage is required and where budgets are limited. This method enables high-precision voltage regulation, ensuring the accuracy of regulation and avoiding deviations between the output voltage and the target output voltage. Furthermore, the regulation process does not require operator expertise, is simple to operate, and has low complexity and difficulty, thereby ensuring output voltage stability and avoiding voltage fluctuations caused by human factors. This method utilizes automated control, enabling rapid response and precise regulation, meeting the needs of modern industrial automation and diversified engineering projects, and enabling rapid adaptation to application scenarios with varying voltage outputs.

[0047] The control method for precisely adjusting voltage in a voltage regulator, provided by this invention, introduces a phased intelligent control strategy between existing manual or automatic command transmission and actuators, without adding additional hardware costs. Without increasing costs, it achieves precise and rapid regulation of the actual output voltage to achieve the target output voltage value. This method can quickly achieve the desired target output voltage. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0049] Figure 1 A flow chart of a control method for accurately adjusting voltage by a voltage regulator provided by an embodiment of the present invention;

[0050] Figure 2 This is a schematic diagram of actual output voltage regulation changes provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0051] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, unless there is a conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0052] See Figure 1-2 As shown, in some embodiments of the present application, this embodiment provides a control method for a voltage regulator to accurately adjust voltage, including the following steps:

[0053] S100: Determine a device to be adjusted, and connect the device to be adjusted to hardware of an electrical control system; wherein the hardware includes a regulating switch, a three-phase regulating motor, and a voltage regulator;

[0054] S200: Determine a target output voltage of the device to be adjusted, and collect an actual output voltage corresponding to the device to be adjusted at an initial moment; compare the actual output voltage with the target output voltage, and determine a voltage control strategy for the device to be adjusted based on the comparison result;

[0055] S300: Execute the voltage control strategy, control the regulating switch and the three-phase regulating motor to adjust the actual output voltage; when the actual output voltage of the device to be adjusted reaches the target output voltage, use a periodic on-off control method to correct the voltage deviation caused by the motor inertia of the three-phase regulating motor, and obtain a stable output voltage.

[0056] The control method for precisely adjusting the voltage of a voltage regulator provided in this embodiment is cost-effective, precisely adjusting the actual output voltage. It is particularly suitable for applications requiring frequent adjustments to the actual output voltage and with limited budgets. This method enables high-precision voltage regulation, ensuring accurate regulation and avoiding deviations between the output voltage and the target output voltage. Furthermore, the regulation process does not require specialized operator skills, is simple to operate, and has minimal complexity and difficulty, thereby ensuring output voltage stability and avoiding voltage fluctuations caused by human factors. This method utilizes automated control, enabling rapid response and precise regulation, meeting the needs of modern industrial automation and diverse engineering projects, and enabling rapid adaptation to diverse voltage output scenarios.

[0057] The control method for precisely adjusting voltage in a voltage regulator, provided in this embodiment, introduces a phased intelligent control strategy between existing manual or automatic command transmission and actuators without adding additional hardware costs. Without increasing costs, this method achieves precise and rapid regulation of the actual output voltage to achieve the target output voltage value. This method can quickly achieve the desired target output voltage.

[0058] Specifically, the voltage control strategy includes controlling the state of the regulating switch and the direction of rotation of the three-phase regulating motor.

[0059] Specifically, determining the voltage control strategy of the device to be adjusted based on the comparison result includes:

[0060] When the actual output voltage is less than the target output voltage, the regulating switches are respectively adjusted to a conductive state to rotate the three-phase regulating motor in a forward direction;

[0061] When the actual output voltage rises to 0.95 times the target output voltage, the preliminary voltage regulation is completed, and 0.95 times the target output voltage is used as the preliminary regulation value.

[0062] Specifically, when determining the voltage control strategy of the device to be adjusted according to the comparison result, it also includes:

[0063] When the actual output voltage is greater than the target output voltage, the regulating switches are respectively adjusted to a conductive state, and the three-phase regulating motor is rotated in the reverse direction;

[0064] When the actual output voltage drops to 1.05 times the target output voltage, the preliminary voltage regulation is completed, and 1.05 times the target output voltage is used as the preliminary regulation value.

[0065] It can be understood that setting the initial adjustment value helps more accurately approach the target output voltage, reducing the amplitude and frequency of subsequent adjustments, thereby improving adjustment efficiency and accuracy. After the initial adjustment is completed, the system continues to monitor the gap between the actual output voltage and the target output voltage, and further narrows this gap by fine-tuning the state of the adjustment switch and the speed of the three-phase adjustment motor. This staged intelligent control adjustment strategy not only improves the accuracy of voltage regulation, but also ensures the smoothness and continuity of the adjustment process, avoiding the impact and damage to the electrical system caused by sudden, large-scale adjustments.

[0066] Specifically, the calculation formula of the preliminary adjustment value is:

[0067]

[0068] Among them, U b Indicates the initial adjustment value; U o Indicates the actual output voltage; U g is the target output voltage.

[0069] Specifically, when a periodic on-off control method is used to correct the voltage deviation caused by the motor inertia of the three-phase regulating motor and obtain a stable output voltage, the method includes:

[0070] A cycle T is set, and in each cycle T, the three-phase regulating motor is controlled to be on and off;

[0071] Analyzing the voltage deviation to obtain the voltage deviation characteristic value, and determining the initial on-off time ratio of the three-phase regulating motor according to the voltage deviation characteristic value;

[0072] Obtaining the standard deviation of the voltage deviation within n consecutive cycles and recording it as the voltage standard deviation; wherein n ≥ 2, and n is an integer;

[0073] Determining whether to adjust the initial on-off time ratio according to the voltage standard deviation;

[0074] If yes, calculate the voltage change rate between the current cycle and the previous cycle, and obtain the target adjustment time, determine the adjustment coefficient of the initial on-off time ratio according to the voltage change rate and the target adjustment time, and obtain the final on-off time ratio;

[0075] The on and off of the three-phase regulating motor is controlled according to the final on-off time ratio until the voltage deviation is less than the voltage deviation threshold.

[0076] In an embodiment, the voltage deviation characteristic value is preferably an absolute value of the voltage deviation or a square value of the voltage deviation.

[0077] In the embodiment, the standard deviation of the voltage deviation within n consecutive cycles is an important indicator for measuring voltage fluctuation. By calculating the discrete degree of the voltage deviation within n consecutive cycles, the stability of the voltage regulation process can be more accurately reflected.

[0078] It is understandable that when the voltage standard deviation is large, it indicates that the voltage fluctuation is more severe, and it may be necessary to adjust the initial on-off time ratio more significantly to quickly stabilize the voltage; when the voltage standard deviation is small, it indicates that the voltage is already relatively stable. At this time, the adjustment of the initial on-off time ratio should be more precise to avoid voltage overshoot or oscillation caused by excessive adjustment.

[0079] It's understandable that by calculating the voltage change rate between the current cycle and the previous cycle and obtaining the target regulation time, we can further refine the adjustment of the initial on-off time ratio. The voltage change rate reflects the speed and trend of voltage regulation, while the target regulation time is determined based on the voltage change rate and the desired regulation effect. By comprehensively considering the voltage change rate and target regulation time, we can determine a more reasonable adjustment coefficient, thereby achieving a more accurate final on-off time ratio.

[0080] Specifically, determining the initial on-off time ratio of the three-phase regulating motor according to the voltage deviation characteristic value includes:

[0081] Comparing the voltage deviation characteristic value with a first voltage deviation characteristic value and a second voltage deviation characteristic value, and determining an initial on-off time ratio of the three-phase regulating motor according to the comparison result; wherein the first voltage deviation characteristic value is smaller than the second voltage deviation characteristic value;

[0082] When the voltage deviation characteristic value is less than or equal to the first voltage deviation characteristic value, determining the initial on-off time ratio of the three-phase regulating motor to be the first on-off time ratio;

[0083] When the voltage deviation characteristic value is greater than the first voltage deviation characteristic value and less than or equal to the second voltage deviation characteristic value, determining the initial on-off time ratio of the three-phase regulating motor to be the second on-off time ratio;

[0084] When the voltage deviation characteristic value is greater than the second voltage deviation characteristic value, the initial on-off time ratio of the three-phase regulating motor is determined to be a third on-off time ratio.

[0085] In the embodiment, the first on-off time ratio, the second on-off time ratio, and the third on-off time ratio are pre-set based on actual regulation requirements and system characteristics. The first on-off time ratio, the second on-off time ratio, and the third on-off time ratio are in a relationship such that the first on-off time ratio < the second on-off time ratio < the third on-off time ratio.

[0086] It can be understood that by setting different voltage deviation characteristic value ranges and corresponding initial on-off time ratios, the on-off control strategy of the three-phase regulating motor can be flexibly adjusted according to the actual voltage deviation. This not only improves the flexibility and adaptability of voltage regulation, but also helps maintain voltage stability and accuracy under different operating conditions. In addition, as the voltage deviation gradually decreases, the initial on-off time ratio is adjusted accordingly to ensure a smooth transition during the regulation process and a stable final voltage output.

[0087] Specifically, determining whether to adjust the initial on-off time ratio according to the voltage standard deviation includes:

[0088] Comparing the voltage standard deviation with a voltage standard deviation threshold, and determining whether to adjust the initial on-off time ratio according to the comparison result;

[0089] When the voltage standard deviation is less than or equal to the voltage standard deviation threshold, determining not to adjust the initial on-off time ratio;

[0090] When the voltage standard deviation is greater than the voltage standard deviation threshold, it is determined that the initial on-off time ratio is to be adjusted.

[0091] As you can see, by setting the voltage standard deviation threshold, we can intelligently determine the stability of the voltage regulation process and thus decide whether to adjust the initial on-off time ratio. This intelligent judgment mechanism not only improves the automation level of voltage regulation but also helps ensure the stability and accuracy of voltage output while maintaining regulation efficiency.

[0092] Specifically, determining the adjustment coefficient of the initial on-off time ratio according to the voltage change rate and the target adjustment time, and obtaining the final on-off time ratio, includes:

[0093] constructing the voltage change rate and the target adjustment time into an adjustment feature group;

[0094] Comparing the adjustment feature group with the historical adjustment group, and determining the adjustment coefficient of the initial on-off time ratio according to the comparison result;

[0095] When there is a historical adjustment feature group identical to the adjustment feature group in the historical adjustment group, the historical adjustment coefficient corresponding to the historical adjustment feature group is used as the adjustment coefficient, and the product of the historical adjustment coefficient and the initial on-off time ratio is used as the final on-off time ratio;

[0096] When there is no historical adjustment feature group identical to the adjustment feature group in the historical adjustment group, the overlap between the adjustment feature group and the historical adjustment group is calculated, and the maximum overlap is extracted; the adjustment coefficient is determined based on the maximum overlap, and the product value of the adjustment coefficient and the initial on-off time ratio is used as the final on-off time ratio.

[0097] In this embodiment, the adjustment feature set is (voltage change rate, target adjustment time), denoted by (ΔU, Ttarget). The historical adjustment set is the adjustment feature set and its corresponding adjustment coefficient, recorded from similar adjustment processes in the past, denoted by (ΔUhistory,i, Ttargethistory,i; Khistory,i), where Khistory,i is the historical adjustment coefficient of the i-th historical adjustment set. By comparing the current adjustment feature set with the historical adjustment sets, the historical adjustment strategy that most closely matches the current operating conditions can be quickly identified, allowing for more accurate determination of the adjustment coefficient and improving the efficiency and accuracy of voltage regulation. If no historical adjustment feature set exists that is identical to the current adjustment feature set in the historical adjustment set, the most similar historical adjustment strategy is found by calculating the degree of overlap. The degree of overlap reflects the degree of similarity between the current adjustment feature set and the historical adjustment set; a higher degree of overlap indicates closer similarity. The adjustment coefficient determined based on the maximum degree of overlap can more closely align with actual regulation requirements, thereby ensuring the accuracy and stability of voltage regulation. This intelligent adjustment strategy based on historical data not only improves the automation of voltage regulation but also facilitates rapid and accurate voltage regulation under various operating conditions.

[0098] In this embodiment, the overlap is obtained by the following formula:

[0099]

[0100] Wherein, Oi represents the overlap between the adjustment feature group and the i-th historical adjustment group; ΔU represents the voltage change rate; Ttarget represents the target adjustment time; ΔUhistory,i and Ttargethistory,i represent the voltage change rate and target adjustment time in the i-th historical adjustment group, respectively.

[0101] Specifically, determining the adjustment coefficient according to the maximum overlap includes:

[0102] Comparing the maximum overlap with a first maximum overlap and a second maximum overlap, and determining the adjustment coefficient according to the comparison result; wherein the first maximum overlap is smaller than the second maximum overlap;

[0103] When the maximum overlap is less than or equal to the first maximum overlap, determining the adjustment coefficient to be the first adjustment coefficient;

[0104] When the maximum overlap is greater than the first maximum overlap and less than or equal to the second maximum overlap, determining the adjustment coefficient to be a second adjustment coefficient;

[0105] When the maximum overlap is greater than the second maximum overlap, the adjustment coefficient is determined to be a third adjustment coefficient.

[0106] In this embodiment, the first adjustment coefficient, the second adjustment coefficient and the third adjustment coefficient are pre-set according to actual adjustment requirements, and the magnitude relationship between the first adjustment coefficient, the second adjustment coefficient and the third adjustment coefficient is first adjustment coefficient < second adjustment coefficient < third adjustment coefficient.

[0107] It's understandable that by setting different maximum overlap ranges and corresponding adjustment coefficients, the initial on-off time ratio adjustment coefficient can be flexibly adjusted based on the similarity between the current adjustment profile and the historical adjustment profile. This maximum overlap-based adjustment strategy not only enhances the intelligence of voltage regulation but also helps improve regulation efficiency and stability while ensuring regulation accuracy. Furthermore, as the voltage regulation process progresses, the adjustment coefficient is dynamically adjusted based on actual voltage changes and the target regulation time to ensure smoothness and continuity throughout the entire regulation process.

[0108] In this embodiment, the final on-off time ratio is determined to be 7:3, that is, the final on time T1 is 700ms, and the final off time T2 is 300ms.

[0109] When the final on-state time is 700ms, the state of the regulating switch is on, and the direction of the three-phase regulating motor continues to rotate forward and reverse according to the relationship between the target output voltage and the actual output voltage. During the on-state period, the actual output voltage will be further adjusted according to the rotation direction of the three-phase regulating motor;

[0110] When the final open circuit time is 300ms, the state of the regulation switch is open circuit, and the three-phase regulation motor moves by inertia until it stops rotating. During the open circuit period, due to the inertia of the three-phase regulation motor, after it stops rotating, the actual output voltage remains stable.

[0111] See Figure 2, which is a schematic diagram of actual output voltage regulation changes provided by this embodiment. In the figure, the horizontal axis represents time; the vertical axis represents the output voltage value.

[0112] Table 1 shows three target output voltage control methods as examples. The target output voltage can be set as needed, and the control method is automatically determined and executed.

[0113] Table 1:

[0114]

[0115]

[0116] Open circuit means that the three-phase regulating motor is disabled, so that the actual output voltage does not change;

[0117] The path refers to enabling the three-phase regulating motor so that the actual output voltage increases or decreases with the direction of the three-phase regulating motor;

[0118] Braking refers to maintaining the rotation angle of the three-phase regulating motor during its operation, thereby fixing the actual output voltage;

[0119] When the three-phase regulating motor is in the forward direction, the actual output voltage is controlled to increase;

[0120] When the three-phase regulating motor rotates in the reverse direction, the actual output voltage is controlled to decrease;

[0121] The completion time of the initial moment refers to the end of the initial adjustment process. At this time, the actual output voltage is close to the target output voltage, but there may still be a certain deviation;

[0122] The fine-tuning moment t1 refers to the first fine-tuning operation. At this time, the state of the adjustment switch and the direction of the three-phase adjustment motor are controlled according to the final on-off time ratio to further approach the target output voltage.

[0123] The fine-tuning moment t2 refers to the second fine-tuning operation. At this time, the state of the regulating switch may become open, causing the three-phase regulating motor to stop rotating, and using inertia to keep the actual output voltage stable.

[0124] The target output voltage is reached when the actual output voltage reaches or is very close to the target output voltage, and the voltage deviation is less than the preset voltage deviation threshold. The voltage regulation process ends. The three-phase regulating motor stops, the regulating switch remains open, and the system enters a stable state.

[0125] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or a combination of software and hardware embodiments. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0126] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0127] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0128] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0129] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. A control method for accurately adjusting voltage of a voltage regulator, characterized in that: include: Determine the device to be adjusted, and connect the device to be adjusted with the hardware of the electrical control system; wherein the hardware includes a regulating switch, a three-phase regulating motor and a voltage regulator; Determining a target output voltage of the device to be adjusted, and collecting an actual output voltage corresponding to the device to be adjusted at an initial moment; comparing the actual output voltage with the target output voltage, and determining a voltage control strategy for the device to be adjusted based on the comparison result; Execute the voltage control strategy, control the regulating switch and the three-phase regulating motor to adjust the actual output voltage; when the actual output voltage of the device to be adjusted reaches the target output voltage, use a periodic on-off control method to correct the voltage deviation caused by the motor inertia of the three-phase regulating motor, and obtain a stable output voltage.

2. The control method for accurately adjusting voltage of a voltage regulator according to claim 1, characterized in that: The voltage control strategy includes controlling the state of the regulating switch and the direction of rotation of the three-phase regulating motor.

3. The control method for accurately adjusting voltage of a voltage regulator according to claim 2, characterized in that: Determining the voltage control strategy of the device to be adjusted based on the comparison result includes: When the actual output voltage is less than the target output voltage, the regulating switches are respectively adjusted to a conductive state to rotate the three-phase regulating motor in a forward direction; When the actual output voltage rises to 0.95 times the target output voltage, the preliminary voltage regulation is completed, and 0.95 times the target output voltage is used as the preliminary regulation value.

4. The control method for accurately adjusting voltage of a voltage regulator according to claim 3, characterized in that: When determining the voltage control strategy of the device to be adjusted according to the comparison result, the method further includes: When the actual output voltage is greater than the target output voltage, the regulating switches are respectively adjusted to a conductive state, and the three-phase regulating motor is rotated in the reverse direction; When the actual output voltage drops to 1.05 times the target output voltage, the preliminary voltage regulation is completed, and 1.05 times the target output voltage is used as the preliminary regulation value.

5. The control method for accurately adjusting voltage of a voltage regulator according to claim 4, characterized in that: The calculation formula of the preliminary adjustment value is: Among them, U b Indicates the initial adjustment value; U o Indicates the actual output voltage; U g is the target output voltage.

6. The control method for accurately adjusting voltage of a voltage regulator according to claim 5, characterized in that: When a periodic on-off control method is used to correct the voltage deviation caused by the motor inertia of the three-phase regulating motor and obtain a stable output voltage, the method includes: A cycle T is set, and in each cycle T, the three-phase regulating motor is controlled to be on and off; Analyzing the voltage deviation to obtain the voltage deviation characteristic value, and determining the initial on-off time ratio of the three-phase regulating motor according to the voltage deviation characteristic value; Obtaining the standard deviation of the voltage deviation within n consecutive cycles and recording it as the voltage standard deviation; wherein n ≥ 2, and n is an integer; Determining whether to adjust the initial on-off time ratio according to the voltage standard deviation; If yes, calculate the voltage change rate between the current cycle and the previous cycle, and obtain the target adjustment time, determine the adjustment coefficient of the initial on-off time ratio according to the voltage change rate and the target adjustment time, and obtain the final on-off time ratio; The on and off of the three-phase regulating motor is controlled according to the final on-off time ratio until the voltage deviation is less than the voltage deviation threshold.

7. The control method for accurately adjusting voltage of a voltage regulator according to claim 6, characterized in that: When determining the initial on-off time ratio of the three-phase regulating motor according to the voltage deviation characteristic value, it includes: Comparing the voltage deviation characteristic value with a first voltage deviation characteristic value and a second voltage deviation characteristic value, and determining an initial on-off time ratio of the three-phase regulating motor according to the comparison result; wherein the first voltage deviation characteristic value is smaller than the second voltage deviation characteristic value; When the voltage deviation characteristic value is less than or equal to the first voltage deviation characteristic value, determining the initial on-off time ratio of the three-phase regulating motor to be the first on-off time ratio; When the voltage deviation characteristic value is greater than the first voltage deviation characteristic value and less than or equal to the second voltage deviation characteristic value, determining the initial on-off time ratio of the three-phase regulating motor to be the second on-off time ratio; When the voltage deviation characteristic value is greater than the second voltage deviation characteristic value, the initial on-off time ratio of the three-phase regulating motor is determined to be a third on-off time ratio.

8. The control method for accurately adjusting voltage of a voltage regulator according to claim 6, characterized in that: When determining whether to adjust the initial on-off time ratio according to the voltage standard deviation, the method includes: Comparing the voltage standard deviation with a voltage standard deviation threshold, and determining whether to adjust the initial on-off time ratio according to the comparison result; When the voltage standard deviation is less than or equal to the voltage standard deviation threshold, determining not to adjust the initial on-off time ratio; When the voltage standard deviation is greater than the voltage standard deviation threshold, it is determined that the initial on-off time ratio is to be adjusted.

9. The control method for accurately adjusting voltage of a voltage regulator according to claim 6, characterized in that: Determining the adjustment coefficient of the initial on-off time ratio according to the voltage change rate and the target adjustment time, and obtaining the final on-off time ratio, includes: constructing the voltage change rate and the target adjustment time into an adjustment feature group; Comparing the adjustment feature group with the historical adjustment group, and determining the adjustment coefficient of the initial on-off time ratio according to the comparison result; When there is a historical adjustment feature group identical to the adjustment feature group in the historical adjustment group, the historical adjustment coefficient corresponding to the historical adjustment feature group is used as the adjustment coefficient, and the product of the historical adjustment coefficient and the initial on-off time ratio is used as the final on-off time ratio; When there is no historical adjustment feature group identical to the adjustment feature group in the historical adjustment group, the overlap between the adjustment feature group and the historical adjustment group is calculated, and the maximum overlap is extracted; the adjustment coefficient is determined based on the maximum overlap, and the product value of the adjustment coefficient and the initial on-off time ratio is used as the final on-off time ratio.

10. The control method for accurately adjusting voltage of a voltage regulator according to claim 9, characterized in that: Determining the adjustment coefficient according to the maximum overlap includes: Comparing the maximum overlap with a first maximum overlap and a second maximum overlap, and determining the adjustment coefficient according to the comparison result; wherein the first maximum overlap is smaller than the second maximum overlap; When the maximum overlap is less than or equal to the first maximum overlap, determining the adjustment coefficient to be the first adjustment coefficient; When the maximum overlap is greater than the first maximum overlap and less than or equal to the second maximum overlap, determining the adjustment coefficient to be a second adjustment coefficient; When the maximum overlap is greater than the second maximum overlap, the adjustment coefficient is determined to be a third adjustment coefficient.

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