Compensation ac voltage stabilizer control method, device and electronic equipment

Abstract

The application provides a compensation type AC voltage stabilizer control method and device, electronic equipment and storage medium. The method comprises the following steps: acquiring the output voltage of the compensation type AC voltage stabilizer; determining the absolute value of the difference between the output voltage and the target voltage; if the absolute value is greater than or equal to the first threshold value and less than the second threshold value, determining the target compensation level according to the current compensation level and the slow compensation scheme; if the absolute value is greater than or equal to the second threshold value, determining the target compensation level according to the fast compensation scheme; performing voltage compensation control on the compensation type AC voltage stabilizer based on the target compensation level; wherein different compensation levels correspond to different compensation voltages; the compensation level span corresponding to the adjacent adjustment period determined by the fast compensation scheme is greater than or equal to the compensation level span corresponding to the adjacent adjustment period determined by the slow compensation scheme; the first threshold value is less than the second threshold value. The application can avoid over-regulation or mis-regulation, and adapt to fast regulation requirements to improve regulation efficiency.

Description

Technical Field

[0001] This application relates to the field of power supply technology, and in particular to a compensating AC voltage regulator control method, device and electronic equipment. Background Technology

[0002] To ensure the normal operation of a UPS, an AC voltage regulator is typically installed in the bypass circuit to improve power quality and provide a qualified bypass power supply, such as the one mentioned above. Figure 1 Compensated AC voltage regulators are widely used in UPS systems due to their advantages such as high efficiency and energy saving, rapid adjustment, and long service life.

[0003] In implementing the embodiments of this application, it was found that existing solutions have at least the following problems:

[0004] Existing compensation control schemes based on mains input voltage for compensated AC voltage regulators neglect the voltage regulation function of the compensated AC voltage regulators themselves, resulting in over-adjustment or mis-adjustment and reducing the regulation efficiency of the bypass power supply. Summary of the Invention

[0005] This application provides a compensation AC voltage regulator control method, device, and electronic device to solve the problem of low bypass power supply regulation efficiency in existing compensation control schemes for compensation AC voltage regulators.

[0006] In a first aspect, embodiments of this application provide a compensated AC voltage regulator control method, including:

[0007] Obtain the output voltage of the compensated AC voltage regulator;

[0008] Determine the absolute value of the difference between the output voltage and the target voltage;

[0009] If the absolute value is greater than or equal to the first threshold and less than the second threshold, the target compensation level is determined based on the current compensation level and the slow compensation scheme; if the absolute value is greater than or equal to the second threshold, the target compensation level is determined based on the current compensation level and the fast compensation scheme.

[0010] The voltage compensation control of the compensated AC voltage regulator is performed based on the target compensation level.

[0011] Different compensation levels correspond to different compensation voltages; the compensation level span between adjacent adjustment cycles determined by the fast compensation scheme is greater than or equal to the compensation level span between adjacent adjustment cycles determined by the slow compensation scheme; the first threshold is less than the second threshold.

[0012] In one possible implementation, determining the target compensation level based on the current compensation level and the slow compensation scheme includes:

[0013] If the difference is greater than zero and the current level is not the lowest level, then the compensation level one level lower than the current compensation level is determined as the target compensation level; if the difference is greater than zero and the current level is the lowest level, then the lowest level is determined as the target compensation level.

[0014] If the difference is less than zero and the current level is not the highest level, then the next higher compensation level is determined as the target compensation level; if the difference is greater than zero and the current level is the highest level, then the highest level is determined as the target compensation level; wherein, the compensation voltage values ​​corresponding to the compensation levels from low to high are from small to large, and the compensation voltage values ​​include negative voltage values, zero values, and positive voltage values.

[0015] In one possible implementation, determining the target compensation level based on the current compensation level and the rapid compensation scheme includes:

[0016] If the difference is greater than zero and the current level is not the lowest level, then the target compensation level is determined based on the difference and the current compensation level; if the difference is greater than zero and the current level is the lowest level, then the lowest level is determined as the target compensation level.

[0017] If the difference is less than zero and the current level is not the highest level, then the target compensation level is determined based on the difference and the current compensation level; if the difference is greater than zero and the current level is the highest level, then the highest level is determined as the target compensation level; wherein, the compensation voltage values ​​corresponding to the compensation levels from low to high are from small to large, and the compensation voltage values ​​include negative voltage values, zero values, and positive voltage values.

[0018] In one possible implementation, determining the target compensation level based on the difference and the current compensation level includes:

[0019] The candidate target compensation level is determined based on the difference and the current compensation level;

[0020] When the level span between the candidate target compensation level and the current compensation level is less than or equal to a set number of levels, the candidate target compensation level is determined as the target level;

[0021] When the gap between the candidate target compensation level and the current compensation level is greater than a set number of levels, the target compensation level is determined based on the current compensation level and the set number of levels; wherein, if the difference is greater than zero, the priority of the candidate target compensation level is lower than that of the target compensation level; if the difference is less than zero, the priority of the candidate target compensation level is higher than that of the target compensation level.

[0022] In one possible implementation, the method further includes:

[0023] Obtain a preset compensation level table, and determine the target compensation level by looking up the table according to the compensation level table;

[0024] The preset compensation level table includes: compensation level and compensation voltage value corresponding to each compensation level.

[0025] In one possible implementation, after performing voltage compensation control on the compensated AC voltage regulator based on the target compensation level, the method further includes:

[0026] The sampling time interval of the output voltage is determined based on the absolute value;

[0027] The smaller the absolute value, the smaller the corresponding data collection time interval.

[0028] Secondly, embodiments of this application provide a compensated AC voltage regulator control device, comprising:

[0029] The acquisition module is used to acquire the output voltage of the compensated AC voltage regulator;

[0030] The determination module is used to determine the absolute value of the difference between the output voltage and the target voltage; if the absolute value is greater than or equal to a first threshold and less than a second threshold, then a target compensation level is determined based on the current compensation level and the slow compensation scheme; if the absolute value is greater than or equal to the second threshold, then a target compensation level is determined based on the current compensation level and the fast compensation scheme.

[0031] The compensation control module is used to perform voltage compensation control on the compensated AC voltage regulator based on the target compensation level.

[0032] Different compensation levels correspond to different compensation-type AC voltage regulator loops; the compensation level span between adjacent adjustment cycles determined by the fast compensation scheme is greater than or equal to the compensation level span between adjacent adjustment cycles determined by the slow compensation scheme; the first threshold is less than the second threshold.

[0033] In one possible implementation, the determining module is specifically used for:

[0034] If the difference is greater than zero and the current level is not the lowest level, then the compensation level one level lower than the current compensation level is determined as the target compensation level; if the difference is greater than zero and the current level is the lowest level, then the lowest level is determined as the target compensation level.

[0035] If the difference is less than zero and the current level is not the highest level, then the next higher compensation level is determined as the target compensation level; if the difference is greater than zero and the current level is the highest level, then the highest level is determined as the target compensation level; wherein, the compensation voltage values ​​corresponding to the compensation levels from low to high are from small to large, and the compensation voltage values ​​include negative voltage values, zero values, and positive voltage values.

[0036] In one possible implementation, the determining module is specifically used for:

[0037] If the difference is greater than zero and the current level is not the lowest level, then the target compensation level is determined based on the difference and the current compensation level; if the difference is greater than zero and the current level is the lowest level, then the lowest level is determined as the target compensation level.

[0038] If the difference is less than zero and the current level is not the highest level, then the target compensation level is determined based on the difference and the current compensation level; if the difference is greater than zero and the current level is the highest level, then the highest level is determined as the target compensation level; wherein, the compensation voltage values ​​corresponding to the compensation levels from low to high are from small to large, and the compensation voltage values ​​include negative voltage values, zero values, and positive voltage values.

[0039] In one possible implementation, the determining module is specifically used for:

[0040] The candidate target compensation level is determined based on the difference and the current compensation level;

[0041] When the level span between the candidate target compensation level and the current compensation level is less than or equal to a set number of levels, the candidate target compensation level is determined as the target level;

[0042] When the gap between the candidate target compensation level and the current compensation level is greater than a set number of levels, the target compensation level is determined based on the current compensation level and the set number of levels; wherein, if the difference is greater than zero, the priority of the candidate target compensation level is lower than that of the target compensation level; if the difference is less than zero, the priority of the candidate target compensation level is higher than that of the target compensation level.

[0043] In one possible implementation, the acquisition module is further configured to acquire a preset compensation level table, and determine the target compensation level by looking up the table according to the compensation level table;

[0044] The preset compensation level table includes: compensation level and compensation voltage value corresponding to each compensation level.

[0045] In one possible implementation, the acquisition module is further configured to determine the sampling time interval of the output voltage based on the absolute value after the compensation control module performs voltage compensation control on the compensated AC regulator based on the target compensation level.

[0046] The smaller the absolute value, the smaller the corresponding data collection time interval.

[0047] Thirdly, embodiments of this application provide an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the method as described in the first aspect or any possible implementation of the first aspect above.

[0048] Fourthly, embodiments of this application provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the method as described in the first aspect or any possible implementation of the first aspect.

[0049] This application provides a compensation-type AC voltage regulator control method, device, electronic device, and storage medium. By acquiring the actual output voltage of the compensation-type AC voltage regulator, the AC voltage regulator is compensated and adjusted, avoiding over-adjustment or misadjustment that can occur when compensation is based on the mains input, thus reducing the number of trial-and-error adjustments. Furthermore, after acquiring the output voltage of the compensation-type AC voltage regulator, the absolute value of the difference between the output voltage and the target voltage is determined. Based on the relationship between the absolute value, a first threshold, and a second threshold, a fast compensation scheme or a slow compensation scheme is selected to adapt to voltage stability adjustment requirements when the difference between the output voltage and the target voltage is small, and also to adapt to rapid adjustment requirements when the difference between the output voltage and the target voltage is large, thereby improving adjustment efficiency. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0051] Figure 1 This is a schematic diagram of a compensated AC voltage regulator provided in one embodiment of this application;

[0052] Figure 2 This is a flowchart illustrating the implementation of a compensated AC voltage regulator control method according to an embodiment of this application.

[0053] Figure 3 This is a flowchart illustrating the implementation of a compensated AC voltage regulator control method according to another embodiment of this application;

[0054] Figure 4 This is a schematic diagram of the structure of a compensated AC voltage regulator control device provided in an embodiment of this application;

[0055] Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0056] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0057] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0058] Unless otherwise stated, the term "multiple" means two or more. The character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B means: A or B. The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0059] The terms used in this application are for describing embodiments only and are not intended to limit the claims. As used in the description of embodiments and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term “and / or” as used herein means including one or more of the associated listed elements and all possible combinations thereof. Additionally, when used in this application, the terms “comprise” and its variations “comprises” and / or “comprising” refer to the presence of stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. Without further limitation, an element defined by the phrase “comprising an…” does not exclude the presence of additional identical elements in the process, method, or apparatus that includes said element.

[0060] In this application, each embodiment focuses on describing the differences from other embodiments, and similar or identical parts between embodiments can be referred to mutually. For methods, products, etc., disclosed in the embodiments, if they correspond to the method section disclosed in the embodiments, then the relevant parts can be referred to the description of the method section.

[0061] The solution provided in this application is mainly for the control of compensated AC voltage stabilizers. For example... Figure 1 This is a schematic diagram of a compensated AC voltage regulator, which includes a compensation unit and two compensation transformers (such as...). Figure 1 The compensation unit (T2 and T3) is connected to the secondary winding of the compensation transformer. The compensation unit includes multiple compensation switches (such as...). Figure 1 In the case of SCR1 to SCR10), multiple compensation circuits are formed by different on / off states of multiple compensation switches and the secondary winding of the compensation transformer.

[0062] In this embodiment, a voltage regulator based on silicon controlled rectifier (SCR) compensation is applied in the bypass voltage regulation scenario of a UPS. Discrete voltage compensation is achieved through the combination of multi-stage taps of the compensation transformer and the on / off switching of the SCR group. Each SCR includes thyristors with opposite conduction directions. Figure 1 As shown, the secondary winding of compensation transformer T2 has two taps, and the secondary winding of compensation transformer T3 has one tap. SCR11 is the total compensation SCR of the circuit. Before switching the tap, SCR11 is disconnected first, and the soft-start resistor plays a role in buffering the transformer. After SCR1 to SCR10 are turned off, SCR11 is turned on. Figure 1 The secondary taps of the compensation transformer and the SCR can be combined to form 15 different compensation circuits, which in turn generate 15 levels of compensation voltage.

[0063] The compensation principle of a compensated AC voltage regulator is explained using a specific embodiment: Figure 1 As shown, the turns ratio of the three windings of transformer T2 is 6.2:88:132; the turns ratio of compensation transformer T3 is 20:220. When the output voltage Uout is 220V, based on the SCR including thyristors with opposite conduction directions, compensation transformer T2 can generate seven compensation voltages in its primary winding (6.2 turns): ±15.1V, ±10.4V, ±6.2V, and 0V. Compensation transformer T3 can generate three compensation voltages in its primary winding (20 turns): ±20.0V and 0V, for a total of 15 voltage compensation options. In other embodiments, the more windings of the compensation transformer, the more compensation levels are available.

[0064] In addition, to achieve closed-loop control of the output voltage, a table is created based on the available compensation levels (or grades) of the compensated AC voltage regulator provided in this specific embodiment. For example... Figure 1The topology has a total of 15 levels, divided into compensation levels from low to high according to the compensation voltage. Compensation level 1 corresponds to a minimum negative compensation voltage of -35.1V, and level 15 corresponds to a maximum compensation voltage of +35.1V, as shown in the table below:

[0065] Table 1. Comparison Table of Compensation Level and Compensation Voltage

[0066]

[0067] In specific embodiments, the buffering capacity of the soft-start resistor on the transformer varies depending on the load power value. This means that the compensated AC voltage regulator, in addition to the compensation unit, possesses a certain degree of voltage regulation function. Current control schemes for compensated AC voltage regulators, which involve compensation control based on the mains input voltage value, neglect the regulator's own voltage regulation performance, leading to over-adjustment of the output voltage.

[0068] The embodiments of this application aim to achieve a rapid effect on the output voltage by using the output voltage of a compensated AC voltage regulator to compensate for voltage regulation, so as to ensure that the output voltage of the compensated AC voltage regulator is stable near or equal to the target voltage.

[0069] To make the objectives, technical solutions, and advantages of this application clearer, the following description will be provided in conjunction with the accompanying drawings and specific embodiments.

[0070] Figure 2 This is a flowchart illustrating the implementation of a compensated AC voltage regulator control method according to an embodiment of this application, as shown below. Figure 2 As shown, the method includes the following steps:

[0071] S201, obtain the output voltage of the compensated AC voltage regulator.

[0072] The execution entity in this embodiment is a controller connected to a compensated AC voltage regulator. By setting a voltage sensor at the output terminal of the compensated AC voltage regulator to collect the output voltage of the compensated AC voltage regulator, the controller directly reads the voltage information collected by the voltage sensor.

[0073] S202 determines the absolute value of the difference between the output voltage and the target voltage.

[0074] The target voltage is the voltage required by the subsequent load circuit of the compensated AC voltage regulator.

[0075] The absolute value of the difference between the output voltage and the target voltage determines the degree of deviation of the output voltage from the target voltage, facilitating the selection of a fast or slow adjustment strategy based on this deviation. Specifically, a larger absolute value indicates a greater deviation of the output voltage from the target voltage, allowing for a faster adjustment strategy to improve output voltage regulation efficiency; conversely, a smaller absolute value indicates a smaller deviation, allowing for a slower adjustment strategy to ensure accurate output voltage regulation and maintain the output voltage at or near the target voltage.

[0076] S203, if the absolute value is greater than or equal to the first threshold and less than the second threshold, then the target compensation level is determined according to the current compensation level and the slow compensation scheme; if the absolute value is greater than or equal to the second threshold, then the target compensation level is determined according to the current compensation level and the fast compensation scheme.

[0077] Wherein, the absolute value is the absolute value of the difference between the output voltage and the target voltage of the compensated AC voltage regulator. Unless otherwise specified below, the difference is the difference between the output voltage and the target voltage, and the absolute value is the absolute value of the difference between the output voltage and the target voltage.

[0078] Different compensation levels correspond to different compensation voltages. The compensation level span between adjacent adjustment cycles determined by the fast compensation scheme is greater than or equal to the compensation level span between adjacent adjustment cycles determined by the slow compensation scheme. That is, when compensation adjustment is performed based on the fast compensation scheme, the compensation voltage value is greater than that of the slow compensation scheme.

[0079] In practice, when the absolute value detected is greater than or equal to the first threshold and less than the second threshold at different times, the combination of different on / off states of multiple compensation switches in the compensation unit of the compensated AC voltage regulator is not fixed. Therefore, when determining the target compensation level, it is necessary to base the current compensation level on the current time when the detected absolute value is greater than the first threshold, so as to adjust at the current compensation level and ensure that the compensation voltage difference corresponding to the compensation level before and after the adjustment meets the adjustment requirements of the output voltage.

[0080] Taking a difference of 6.2V between the output voltage and the target voltage as an example, when the current compensation level of the compensated AC voltage regulator is level 8, according to Table 1, a target level of level 7 can meet the requirement that the difference between the output voltage and the target voltage be 0V. If the current compensation level of the compensated AC voltage regulator is level 7, then according to Table 1, a target level lower than level 7 is required to meet the requirement that the difference between the output voltage and the target voltage be 0V.

[0081] In one possible implementation, the method further includes: obtaining a preset compensation level table, and determining the target compensation level by looking up the table; wherein the preset compensation level table includes: compensation levels and compensation voltage values ​​corresponding to each compensation level.

[0082] In this implementation, a preset compensation level table stores the compensation levels and their corresponding compensation voltage values. Determining the target compensation level based on this table lookup is more intuitive and clear. Optionally, the preset compensation registration table can be stored in the controller or memory of the compensated AC voltage regulator. Additionally, based on... Figure 1 As shown in the structure, the compensation voltage value corresponding to each compensation level is different depending on the output voltage Uout. Therefore, a preset compensation level table is stored for each different output voltage Uout.

[0083] Referring to the compensation levels and compensation voltages in Table 1 above, considering the complexity and cost of the circuit structure of the compensated AC voltage regulator, the number of compensation switches should not be too large. Therefore, the compensation unit can achieve a limited number of compensation voltage adjustments based on different on / off states of multiple compensation switches. Based on this limited number of compensation voltage adjustments, in actual implementation, the output voltage can be adjusted to approach the target voltage, but it cannot guarantee that the output voltage is completely consistent with the target voltage; that is, after voltage regulation, there will still be a certain error between the output voltage and the target voltage. Therefore, in this embodiment, a first threshold and a second threshold are set, with the first threshold being less than the second threshold. This first threshold is less than or equal to the minimum compensation voltage value corresponding to the combination of compensation units. If the absolute value of the difference between the output voltage and the target voltage is determined to be less than the first threshold, then the output voltage is close to the target voltage, and voltage compensation based on any compensation level cannot satisfy the requirement that the output voltage equals the target voltage; in this case, no voltage compensation adjustment is performed.

[0084] If the absolute value is greater than or equal to the first threshold and less than the second threshold, it indicates that the output voltage deviates from the target voltage by a small amount. In this case, a small-amplitude voltage compensation is performed based on the slow adjustment scheme to avoid over-adjustment of the voltage.

[0085] If the absolute value is greater than or equal to the second threshold, it indicates that the output voltage deviates significantly from the target voltage. In this case, a large voltage compensation is performed based on the fast adjustment scheme to achieve rapid adjustment.

[0086] For the same compensated AC voltage regulator, the setting of the first threshold and the second threshold is determined based on the output voltage. The larger the output voltage, the larger the first threshold and the second threshold.

[0087] In other possible implementations, unlike querying a preset compensation level table, the compensation level is calculated using a formula. The output voltage, target voltage, and current level are input into the formula, which outputs the target compensation level. This formula-based approach integrates the compensation level relationships for different output voltages, reducing the storage requirements for compensation level and voltage relationships.

[0088] S204 performs voltage compensation control on a compensated AC voltage regulator based on the target compensation level.

[0089] See the above regarding Figure 1 As introduced in Table 1, different compensation levels correspond to different compensation voltages, which in turn correspond to different combinations of on / off states of the compensation switch. Therefore, voltage compensation control of the compensated AC voltage regulator is performed based on the target compensation level, that is, the on / off state of the compensation switch is adjusted according to the target compensation level.

[0090] In this embodiment, the AC voltage regulator is compensated and adjusted by acquiring the actual output voltage of the compensated AC voltage regulator. This avoids over-adjustment or misadjustment that can occur when adjusting based on the mains input, thus reducing the number of trial and error attempts in the compensation adjustment. Furthermore, after acquiring the output voltage of the compensated AC voltage regulator, the absolute value of the difference between the output voltage and the target voltage is determined. Based on the relationship between the absolute value, a first threshold, and a second threshold, a fast compensation scheme or a slow compensation scheme is selected to meet the voltage stability adjustment requirements when the difference between the output voltage and the target voltage is small. Additionally, it also meets the rapid adjustment requirements when the difference between the output voltage and the target voltage is large, thereby improving adjustment efficiency.

[0091] In one possible implementation, the target compensation level is determined based on the current compensation level and the slow compensation scheme, including:

[0092] If the difference is greater than zero and the current level is not the lowest level, then the compensation level one level lower than the current compensation level is determined as the target compensation level; if the difference is greater than zero and the current level is the lowest level, then the lowest level is determined as the target compensation level.

[0093] If the difference is less than zero and the current level is not the highest level, then the next higher compensation level is determined as the target compensation level; if the difference is greater than zero and the current level is the highest level, then the highest level is determined as the target compensation level; wherein, the compensation voltage values ​​corresponding to the compensation levels from low to high are from small to large, and the compensation voltage values ​​include negative voltage values, zero values ​​and positive voltage values.

[0094] Specifically, based on the condition that the absolute value is greater than or equal to the first threshold and less than the second threshold, if the difference is greater than or equal to zero, that is, the output voltage is greater than the target voltage, then the compensation level needs to be reduced; if the difference is less than or equal to zero, that is, the output voltage is greater than the target voltage, then the compensation level needs to be increased.

[0095] Because the on / off combinations of multiple compensation switches in the compensation unit of the compensated AC voltage regulator are not fixed at different times when the absolute value detected is greater than or equal to the first threshold and less than the second threshold, there are situations where the current compensation level is already at the lowest level when a reduction in compensation is needed, and the current compensation level is already at the highest level when an increase in compensation is needed. In such cases, the current compensation level is maintained unchanged. Otherwise, a single-stage adjustment is performed, either increasing or decreasing the current compensation level by one stage.

[0096] Since the absolute value is greater than or equal to the first threshold and less than the second threshold, meaning the output voltage deviates from the target voltage by a small amount, adjusting the compensation voltage in a step-by-step manner can avoid over-adjustment.

[0097] In one specific embodiment, taking a first threshold of 4V, a second threshold of 10V, and a preset compensation level table as shown in Table 1 as an example, if the current compensation level is level 8 and the difference is 3V, then no compensation level adjustment is made; if the current compensation level is level 8 and the difference is 4.2V, then it is reduced to level 7, which exactly satisfies the difference of 0V; if the current compensation level is level 8 and the difference is 9V, then it is reduced to level 7; if the current compensation level is level 7 and the difference is -9V, then it is increased to level 8.

[0098] It can be seen that if the current compensation level is 8 and the difference is 9V, reducing it to level 7 may still result in a difference greater than zero, while reducing it to level 6 will lead to over-adjustment, meaning the difference changes from greater than zero to less than zero. Furthermore, as described in the aforementioned embodiments, the compensation level and compensation voltage vary depending on the output voltage value. Therefore, by adopting a step-by-step reduction approach, when reducing to level 7, the output voltage changes, and the corresponding compensation level and compensation voltage also change accordingly. If the difference is still greater than zero, the compensation level can be further reduced. This step-by-step reduction process can also reduce voltage fluctuations.

[0099] In this embodiment, when the difference between the output voltage and the target voltage is small, the circuit voltage fluctuation during the compensation voltage adjustment process is reduced based on the slow compensation scheme to meet the voltage stability regulation requirements.

[0100] In one possible implementation, the target compensation level is determined based on the current compensation level and the rapid compensation scheme, including:

[0101] If the difference is greater than zero and the current level is not the lowest level, then the target compensation level is determined based on the difference and the current compensation level; if the difference is greater than zero and the current level is the lowest level, then the lowest level is determined as the target compensation level.

[0102] If the difference is less than zero and the current level is not the highest level, the target compensation level is determined based on the difference and the current compensation level; if the difference is greater than zero and the current level is the highest level, the highest level is determined as the target compensation level; wherein, the compensation voltage values ​​corresponding to the compensation levels from low to high are from small to large, and the compensation voltage values ​​include negative voltage values, zero values ​​and positive voltage values.

[0103] Specifically, similar to the aforementioned embodiments, based on an absolute value greater than or equal to the second threshold, if the difference is greater than or equal to zero (i.e., the output voltage is greater than the target voltage), the compensation level needs to be reduced; if the difference is less than or equal to zero (i.e., the output voltage is greater than the target voltage), the compensation level needs to be increased. There are situations where the current compensation level is already at the lowest level when a reduction in compensation is needed, and the current compensation level is already at the highest level when an increase in compensation is needed. In such cases, the current compensation level is maintained unchanged.

[0104] Unlike the previous embodiments, the output voltage in this embodiment deviates from the target voltage to a greater extent, requiring a significant adjustment of the output voltage. Gradual reduction would prolong the adjustment time, so a rapid compensation scheme is adopted to achieve multi-level upgrades or downgrades.

[0105] In one specific embodiment, taking a first threshold of 4V, a second threshold of 10V, and a preset compensation level table as shown in Table 1 as an example, if the current compensation level is level 8 and the difference is 11V, then it will directly drop two levels to level 6; if the current compensation level is level 6 and the difference is -15V, then it will directly rise three levels to level 9.

[0106] In this embodiment, when the output voltage differs significantly from the target voltage, a fast compensation scheme is used to achieve single-stage multi-level voltage increase and decrease, thereby improving the voltage compensation regulation efficiency.

[0107] In practice, when the compensation level is adjusted by multiple levels in a single operation based on the aforementioned embodiments, it can cause significant voltage fluctuations.

[0108] In one possible implementation, the target compensation level is determined based on the difference and the current compensation level, including:

[0109] The compensation level of the candidate target is determined based on the difference and the current compensation level;

[0110] When the level span between the candidate target compensation level and the current compensation level is less than or equal to the set number of levels, the candidate target compensation level is determined as the target level;

[0111] When the gap between the candidate target compensation level and the current compensation level is greater than a set number of levels, the target compensation level is determined based on the current compensation level and the set number of levels. If the difference is greater than zero, the candidate target compensation level has a lower priority than the target compensation level; if the difference is less than zero, the candidate target compensation level has a higher priority than the target compensation level.

[0112] The number of adjustment levels is determined based on the output voltage, the compensation level, and the corresponding compensation voltage value for each compensation level. The number of adjustment levels is the maximum adjustment amount that can be increased or decreased in a single operation.

[0113] In a specific embodiment, the following example is used: the set compensation level is 3, the first threshold is 4V, the second threshold is 10V, and the preset compensation level table is shown in Table 1. If the current compensation level is 8 and the difference is 11V, the candidate target compensation level is determined to be 6 according to Table 1. The span between the current compensation level 8 and the current compensation level is less than 3 levels, so the level is directly reduced by two levels to 6. If the current compensation level is 6 and the difference is -15V, the level is directly increased by 3 levels to 9. If the current compensation level is 6 and the difference is -35V, the candidate target compensation level is determined to be 10. The span between the current compensation level 6 and the current compensation level is 4 levels, which exceeds the set compensation level of 3 levels, so the level is directly increased by 3 levels to 9. After the adjustment is completed according to the target compensation level, S201 to S204 in the previous embodiment are repeated based on the latest obtained output voltage.

[0114] In this embodiment, the range of change of a single compensation level is limited by the set number of levels, thereby limiting the amount of voltage adjustment in a single compensation, avoiding excessive voltage fluctuations in the circuit, and thus preventing voltage fluctuations from affecting the load equipment.

[0115] In one possible implementation, after performing voltage compensation control on the compensated AC voltage regulator based on the target compensation level, the method further includes:

[0116] The sampling time interval of the output voltage is determined based on the absolute value; the smaller the absolute value, the smaller the corresponding sampling time interval.

[0117] In this embodiment, when the absolute value is large, the voltage difference before and after voltage compensation is large, the voltage in the circuit is high, and it takes a long time to recover to a stable state. Therefore, increasing the sampling time interval of the output voltage can ensure the accuracy of the sampling results.

[0118] In addition, when the SCR drive is turned off, a current zero-crossing is required to completely turn off the SCR. Therefore, the time interval between two consecutive voltage compensation level adjustments must be at least an integer multiple of the grid voltage cycle.

[0119] Figure 3 This is a flowchart illustrating the implementation of a compensated AC voltage regulator control method according to an embodiment of this application, as shown below. Figure 3 As shown, the method includes the following steps:

[0120] Determine the difference between the output voltage and the target voltage;

[0121] Determine if the absolute value is greater than or equal to the second threshold;

[0122] If the absolute value is greater than or equal to the second threshold, fast compensation control is executed; otherwise, it is determined whether the absolute value is greater than or equal to the first threshold. If it is greater than or equal to the first threshold, fast compensation control is executed; otherwise, the process returns to the step of determining the difference between the output voltage and the target voltage.

[0123] The implementation of rapid compensation control specifically includes:

[0124] Determine if the difference is greater than zero;

[0125] If the difference is greater than zero, determine whether the current voltage compensation level is greater than the minimum level. If it is greater than the minimum level, gradually reduce the level according to the set level or directly increase it to the target compensation level. If the current voltage compensation level is the minimum level, the level limit is the minimum level.

[0126] If the difference is less than zero, determine whether the current voltage compensation level is lower than the highest level. If it is lower than the highest level, gradually increase the level according to the set level, or directly increase it to the target compensation level. If the current voltage compensation level is the highest level, the level limit is the highest level.

[0127] The implementation of slow-speed compensation control specifically includes:

[0128] Determine if the difference is greater than zero;

[0129] If the difference is greater than zero, determine whether the current voltage compensation level is greater than the lowest level. If it is greater than the lowest level, reduce it by one level. If the current voltage compensation level is the lowest level, the level limit is the lowest level.

[0130] If the difference is less than zero, determine whether the current voltage compensation level is lower than the highest level. If it is lower than the highest level, increase it by one level. If the current voltage compensation level is the highest level, the level limit is the highest level.

[0131] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0132] The following are device embodiments of this application. For details not described in detail, please refer to the corresponding method embodiments described above.

[0133] Figure 4 This is a schematic diagram of the structure of a compensated AC voltage regulator control device provided in an embodiment of this application, as shown below. Figure 4 As shown, for ease of explanation, only the parts related to the embodiments of this application are shown, such as... Figure 4 As shown, the device includes:

[0134] The acquisition module 401 is used to acquire the output voltage of the compensated AC voltage regulator;

[0135] The determination module 402 is used to determine the absolute value of the difference between the output voltage and the target voltage; if the absolute value is greater than or equal to a first threshold and less than a second threshold, the target compensation level is determined according to the current compensation level and the slow compensation scheme; if the absolute value is greater than or equal to the second threshold, the target compensation level is determined according to the current compensation level and the fast compensation scheme.

[0136] Compensation control module 403 is used to perform voltage compensation control on the compensated AC voltage regulator based on the target compensation level;

[0137] Among them, different compensation levels correspond to different compensation-type AC voltage regulator loops; the compensation level span corresponding to adjacent adjustment cycles determined by the fast compensation scheme is greater than or equal to the compensation level span corresponding to adjacent adjustment cycles determined by the slow compensation scheme; the first threshold is less than the second threshold.

[0138] In one possible implementation, module 402 is specifically used for:

[0139] If the difference is greater than zero and the current level is not the lowest level, then the compensation level one level lower than the current compensation level is determined as the target compensation level; if the difference is greater than zero and the current level is the lowest level, then the lowest level is determined as the target compensation level.

[0140] If the difference is less than zero and the current level is not the highest level, then the next higher compensation level is determined as the target compensation level; if the difference is greater than zero and the current level is the highest level, then the highest level is determined as the target compensation level; wherein, the compensation voltage values ​​corresponding to the compensation levels from low to high are from small to large, and the compensation voltage values ​​include negative voltage values, zero values ​​and positive voltage values.

[0141] In one possible implementation, module 402 is specifically used for:

[0142] If the difference is greater than zero and the current level is not the lowest level, then the target compensation level is determined based on the difference and the current compensation level; if the difference is greater than zero and the current level is the lowest level, then the lowest level is determined as the target compensation level.

[0143] If the difference is less than zero and the current level is not the highest level, the target compensation level is determined based on the difference and the current compensation level; if the difference is greater than zero and the current level is the highest level, the highest level is determined as the target compensation level; wherein, the compensation voltage values ​​corresponding to the compensation levels from low to high are from small to large, and the compensation voltage values ​​include negative voltage values, zero values ​​and positive voltage values.

[0144] In one possible implementation, module 402 is specifically used for:

[0145] The compensation level of the candidate target is determined based on the difference and the current compensation level;

[0146] When the level span between the candidate target compensation level and the current compensation level is less than or equal to the set number of levels, the candidate target compensation level is determined as the target level;

[0147] When the gap between the candidate target compensation level and the current compensation level is greater than a set number of levels, the target compensation level is determined based on the current compensation level and the set number of levels. If the difference is greater than zero, the candidate target compensation level has a lower priority than the target compensation level; if the difference is less than zero, the candidate target compensation level has a higher priority than the target compensation level.

[0148] In one possible implementation, the acquisition module 401 is further configured to acquire a preset compensation level table, so as to determine the target compensation level by looking up the table according to the compensation level table.

[0149] The preset compensation level table includes: compensation level and the compensation voltage value corresponding to each compensation level.

[0150] In one possible implementation, the acquisition module 401 is further configured to determine the sampling time interval of the output voltage based on the absolute value after the compensation control module performs voltage compensation control on the compensated AC regulator based on the target compensation level.

[0151] The smaller the absolute value, the smaller the corresponding data collection time interval.

[0152] In this embodiment, the AC voltage regulator is compensated and adjusted by acquiring the actual output voltage of the compensated AC voltage regulator. This avoids over-adjustment or misadjustment that can occur when adjusting based on the mains input, thus reducing the number of trial and error attempts in the compensation adjustment. Furthermore, after acquiring the output voltage of the compensated AC voltage regulator, the absolute value of the difference between the output voltage and the target voltage is determined. Based on the relationship between the absolute value, a first threshold, and a second threshold, a fast compensation scheme or a slow compensation scheme is selected to meet the voltage stability adjustment requirements when the difference between the output voltage and the target voltage is small. Additionally, it also meets the rapid adjustment requirements when the difference between the output voltage and the target voltage is large, thereby improving adjustment efficiency.

[0153] Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. For example... Figure 5 As shown, the electronic device 5 in this embodiment includes: a processor 50, a memory 51, and a computer program 52 stored in the memory 51 and executable on the processor 50. When the processor 50 executes the computer program 52, it implements the steps in the various compensation AC voltage regulator control method embodiments described above, for example... Figure 1 Steps S201 to S204 are shown. Alternatively, when the processor 50 executes the computer program 52, it implements the functions of each module / unit in the above-described device embodiments, for example... Figure 4The functions of modules 401 to 403 are shown.

[0154] For example, the computer program 52 can be divided into one or more modules / units, which are stored in the memory 51 and executed by the processor 50 to complete this application. The one or more modules / units can be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the computer program 52 in the electronic device 5. For example, the computer program 52 can be divided into... Figure 3 Modules 301 to 303 are shown.

[0155] The electronic device 5 can be a desktop computer, laptop, handheld computer, cloud server, or other computing device. The electronic device 5 may include, but is not limited to, a processor 50 and a memory 51. Those skilled in the art will understand that... Figure 5 This is merely an example of electronic device 5 and does not constitute a limitation on electronic device 5. It may include more or fewer components than shown, or combine certain components, or different components. For example, the electronic device may also include input / output devices, network access devices, buses, etc.

[0156] The processor 50 may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0157] The memory 51 can be an internal storage unit of the electronic device 5, such as a hard disk or memory. The memory 51 can also be an external storage device of the electronic device 5, such as a plug-in hard disk, Smart Media Card (SMC), Secure Digital (SD) card, or Flash Card. Furthermore, the memory 51 can include both internal and external storage units of the electronic device 5. The memory 51 is used to store the computer program and other programs and data required by the electronic device. The memory 51 can also be used to temporarily store data that has been output or will be output.

[0158] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0159] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0160] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed in this application can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0161] In the embodiments provided in this application, it should be understood that the disclosed devices / electronic devices and methods can be implemented in other ways. For example, the device / electronic device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual couplings or direct couplings or communication connections may be through some interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0162] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0163] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0164] If the integrated module / unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the above-described embodiments can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various compensation-type AC voltage regulator control method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc.

[0165] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A control method for a compensating AC voltage regulator, characterized by, include: Obtain the output voltage of the compensated AC voltage regulator; Determine the absolute value of the difference between the output voltage and the target voltage; If the absolute value is greater than or equal to the first threshold and less than the second threshold, the target compensation level is determined based on the current compensation level and the slow compensation scheme; if the absolute value is greater than or equal to the second threshold, the target compensation level is determined based on the current compensation level and the fast compensation scheme. The voltage compensation control of the compensated AC voltage regulator is performed based on the target compensation level. Different compensation levels correspond to different compensation voltages; the compensation level span between adjacent adjustment cycles determined by the fast compensation scheme is greater than or equal to the compensation level span between adjacent adjustment cycles determined by the slow compensation scheme; the first threshold is less than the second threshold.

2. The compensation-type AC voltage regulator control method according to claim 1, characterized in that, The process of determining the target compensation level based on the current compensation level and the slow compensation scheme includes: If the difference is greater than zero and the current level is not the lowest level, then the compensation level one level lower than the current compensation level is determined as the target compensation level; if the difference is greater than zero and the current level is the lowest level, then the lowest level is determined as the target compensation level. If the difference is less than zero and the current level is not the highest level, then the next higher compensation level is determined as the target compensation level; if the difference is greater than zero and the current level is the highest level, then the highest level is determined as the target compensation level; wherein, the compensation voltage values ​​corresponding to the compensation levels from low to high are from small to large, and the compensation voltage values ​​include negative voltage values, zero values, and positive voltage values.

3. The compensation-type AC voltage regulator control method according to claim 1, characterized in that, The process of determining the target compensation level based on the current compensation level and the rapid compensation plan includes: If the difference is greater than zero and the current level is not the lowest level, then the target compensation level is determined based on the difference and the current compensation level; if the difference is greater than zero and the current level is the lowest level, then the lowest level is determined as the target compensation level. If the difference is less than zero and the current level is not the highest level, then the target compensation level is determined based on the difference and the current compensation level; if the difference is greater than zero and the current level is the highest level, then the highest level is determined as the target compensation level; wherein, the compensation voltage values ​​corresponding to the compensation levels from low to high are from small to large, and the compensation voltage values ​​include negative voltage values, zero values, and positive voltage values.

4. The compensation-type AC voltage regulator control method according to claim 3, characterized in that, Determining the target compensation level based on the difference and the current compensation level includes: The candidate target compensation level is determined based on the difference and the current compensation level; When the level span between the candidate target compensation level and the current compensation level is less than or equal to a set number of levels, the candidate target compensation level is determined as the target level; When the gap between the candidate target compensation level and the current compensation level is greater than a set number of levels, the target compensation level is determined based on the current compensation level and the set number of levels; wherein, if the difference is greater than zero, the priority of the candidate target compensation level is lower than that of the target compensation level; if the difference is less than zero, the priority of the candidate target compensation level is higher than that of the target compensation level.

5. The compensation-type AC voltage regulator control method according to claim 1, characterized in that, The method also includes: Obtain a preset compensation level table, and determine the target compensation level by looking up the table according to the compensation level table; The preset compensation level table includes: compensation level and compensation voltage value corresponding to each compensation level.

6. The control method for a compensated AC voltage regulator according to any one of claims 1 to 5, characterized in that, After performing voltage compensation control on the compensated AC voltage regulator based on the target compensation level, the method further includes: The sampling time interval of the output voltage is determined based on the absolute value; The smaller the absolute value, the smaller the corresponding data collection time interval.

7. A compensating AC voltage regulator control device, characterized in that, include: The acquisition module is used to acquire the output voltage of the compensated AC voltage regulator; The determination module is used to determine the absolute value of the difference between the output voltage and the target voltage; if the absolute value is greater than or equal to a first threshold and less than a second threshold, then the target compensation level is determined according to the current compensation level and the slow compensation scheme; if the absolute value is greater than or equal to the second threshold, then the target compensation level is determined according to the current compensation level and the fast compensation scheme. The compensation control module is used to perform voltage compensation control on the compensated AC voltage regulator based on the target compensation level. Different compensation levels correspond to different compensation-type AC voltage regulator loops; the compensation level span between adjacent adjustment cycles determined by the fast compensation scheme is greater than or equal to the compensation level span between adjacent adjustment cycles determined by the slow compensation scheme; the first threshold is less than the second threshold.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the method as described in any one of claims 1 to 6 above.

9. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method as described in any one of claims 1 to 6 above.

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