CN114640258A - Compensation type alternating current voltage stabilizer control method, control device and control terminal - Google Patents
Compensation type alternating current voltage stabilizer control method, control device and control terminal Download PDFInfo
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- CN114640258A CN114640258A CN202210190345.2A CN202210190345A CN114640258A CN 114640258 A CN114640258 A CN 114640258A CN 202210190345 A CN202210190345 A CN 202210190345A CN 114640258 A CN114640258 A CN 114640258A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
Abstract
The invention is suitable for the technical field of power supplies, and provides a control method, a control device and a control terminal of a compensation type alternating current voltage stabilizer, wherein the method comprises the following steps: acquiring voltage variation of mains voltage before and after a preset time interval; if the voltage variation is larger than the preset variation, determining a first target compensation grade according to the current mains voltage, and controlling the compensation grade of the compensation type alternating current voltage stabilizer to be switched into the first target compensation grade; and if the voltage variation is not larger than the preset variation, performing loop regulation on the compensation level of the compensation type alternating current voltage stabilizer according to the output voltage of the compensation type alternating current voltage stabilizer until the absolute value of the difference value between the output voltage of the compensation type alternating current voltage stabilizer and the rated voltage is smaller than the preset difference value. The invention determines quick adjustment or fine adjustment according to the sudden change condition of the mains supply, and combines the two adjustment modes, thereby effectively improving the adjustment speed and improving the performance of the compensation type alternating current voltage stabilizer.
Description
Technical Field
The invention belongs to the technical field of power supplies, and particularly relates to a control method, a control device and a control terminal of a compensation type alternating current voltage stabilizer.
Background
To ensure the normal operation of the UPS, an ac voltage regulator is usually provided in the bypass circuit to improve the quality of the power supply, and a bypass power supply meeting the requirement is provided, for example, referring to fig. 1. The compensation type alternating current voltage stabilizer is widely applied to the UPS by virtue of the advantages of high efficiency, energy conservation, quick adjustment, long service life and the like.
In the prior art, in order to ensure the regulation precision, the compensation type alternating current voltage stabilizer can carry out compensation control according to the actual output voltage, but the control method cannot carry out quick regulation when the conditions such as abnormal input voltage and the like are faced, and the regulation speed and the regulation precision are influenced.
Disclosure of Invention
In view of this, embodiments of the present invention provide a control method, a control device, and a control terminal for a compensation ac voltage regulator, so as to solve the problem in the prior art that compensation control is performed according to an output voltage, and an adjustment speed is affected when an input voltage is abnormal.
A first aspect of an embodiment of the present invention provides a compensation type ac voltage regulator control method, including:
acquiring voltage variation of mains voltage before and after a preset time interval;
if the voltage variation is larger than the preset variation, determining a first target compensation grade according to the current mains voltage, and controlling the compensation grade of the compensation type alternating current voltage stabilizer to be switched into the first target compensation grade;
and if the voltage variation is not larger than the preset variation, performing loop regulation on the compensation level of the compensation type alternating current voltage stabilizer according to the output voltage of the compensation type alternating current voltage stabilizer until the absolute value of the difference value between the output voltage of the compensation type alternating current voltage stabilizer and the rated voltage is smaller than the preset difference value.
A second aspect of the embodiments of the present invention provides a compensation type ac voltage regulator control apparatus, including:
the variable quantity acquisition module is used for acquiring voltage variable quantities of the mains voltage before and after a preset time interval;
the first compensation grade determining module is used for determining a first target compensation grade according to the current mains voltage and controlling the compensation grade of the compensation type alternating current voltage stabilizer to be switched into the first target compensation grade if the voltage variation is larger than the preset variation;
and the second compensation grade determining module is used for performing loop regulation on the compensation grade of the compensation type alternating current voltage stabilizer according to the output voltage of the compensation type alternating current voltage stabilizer if the voltage variation is not greater than the preset variation until the absolute value of the difference between the output voltage of the compensation type alternating current voltage stabilizer and the rated voltage is smaller than the preset difference.
A third aspect of the embodiments of the present invention provides a control terminal, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the computer program to implement the steps of the control method for the compensated ac voltage regulator according to the first aspect of the embodiments of the present invention.
A fourth aspect of the embodiments of the present invention provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the steps of the control method for a compensated ac voltage regulator according to the first aspect of the embodiments of the present invention are implemented.
The embodiment of the invention provides a control method, a control device and a control terminal of a compensation type alternating current voltage stabilizer, wherein the method comprises the following steps: acquiring voltage variation of mains voltage before and after a preset time interval; if the voltage variation is larger than the preset variation, determining a first target compensation grade according to the current mains voltage, and controlling the compensation grade of the compensation type alternating current voltage stabilizer to be switched into the first target compensation grade; and if the voltage variation is not larger than the preset variation, performing loop regulation on the compensation level of the compensation type alternating current voltage stabilizer according to the output voltage of the compensation type alternating current voltage stabilizer until the absolute value of the difference value between the output voltage of the compensation type alternating current voltage stabilizer and the rated voltage is smaller than the preset difference value. In the embodiment of the invention, the quick adjustment or the fine adjustment is determined according to the sudden change condition of the mains supply, and the two adjustment modes are combined, so that the adjustment speed is increased, the adjustment precision is ensured, and the performance of the compensation type alternating current voltage stabilizer is effectively improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the embodiments or the prior art description will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings may be obtained according to these drawings without inventive labor.
FIG. 1 is a topology diagram of a UPS of the prior art;
fig. 2 is a schematic flow chart illustrating an implementation of a control method of a compensated ac voltage regulator according to an embodiment of the present invention;
FIG. 3 is a topology diagram of a prior art compensated AC voltage regulator;
FIG. 4 is a schematic diagram of a control apparatus of a compensated AC voltage regulator according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a control terminal according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
Referring to fig. 2, an embodiment of the present invention provides a method for controlling a compensated ac voltage regulator, including:
s101: acquiring voltage variation of mains voltage before and after a preset time interval;
s102: if the voltage variation is larger than the preset variation, determining a first target compensation grade according to the current mains voltage, and controlling the compensation grade of the compensation type alternating current voltage stabilizer to be switched into the first target compensation grade;
s103: and if the voltage variation is not larger than the preset variation, performing loop regulation on the compensation level of the compensation type alternating current voltage stabilizer according to the output voltage of the compensation type alternating current voltage stabilizer until the absolute value of the difference value between the output voltage of the compensation type alternating current voltage stabilizer and the rated voltage is smaller than the preset difference value.
Fig. 3 shows a topology diagram of a compensated ac voltage regulator, which provides multi-level voltage compensation by changing the on-off combination state of the thyristors in the thyristor switch group and changing the compensation level, thereby realizing stable output of voltage. In the embodiment of the invention, when the mains supply voltage is input suddenly, the first target compensation level is determined according to the mains supply voltage, the compensation level of the compensation type alternating current voltage stabilizer is directly adjusted to the first target compensation level, the compensation level of the compensation type alternating current voltage stabilizer is roughly adjusted, and the compensation type alternating current voltage stabilizer is quickly adjusted. And when the commercial power does not suddenly change, finely adjusting the compensation grade of the compensation type alternating current voltage stabilizer through the loop. According to the embodiment of the invention, different adjusting modes are adopted for the compensation type alternating current voltage stabilizer according to the variation of the mains voltage, the adjusting speed of the compensation type alternating current voltage stabilizer is improved through coarse adjustment, the adjusting precision is improved through fine adjustment, and the adjusting speed and the adjusting precision are combined, so that the adjusting speed and the adjusting precision are ensured, and the performance of the compensation type alternating current voltage stabilizer is effectively improved.
In some embodiments, S102 may include:
s1021: if the voltage variation is larger than the preset variation, determining a first target compensation grade according to the current mains supply voltage and a preset compensation grade table;
s1022: and controlling the compensation level of the compensation type alternating current voltage stabilizer to be switched to a first target compensation level.
In the embodiment of the invention, if the mains voltage suddenly changes, the first target compensation level can be determined according to the current mains voltage and a preset compensation level table. The preset compensation grade table comprises a plurality of compensation grades and voltage values corresponding to the compensation grades. And if the current mains voltage is 200V, looking up a table to determine that the compensation grade corresponding to 200V is 3, thereby determining that the first target compensation grade is 3, and switching the compensation type alternating current voltage stabilizer to 3 grades by switching the on-off combination state of each thyristor. By the method, the output voltage can be accurately compensated. The setting of the specific compensation grade can be set according to the actual application requirement.
In some embodiments, S103 may include:
s1031: if the voltage variation is not larger than the preset variation, repeating the step of loop control until the absolute value of the difference between the output voltage of the compensation type alternating current voltage stabilizer and the rated voltage is smaller than the preset difference;
the step of loop control may comprise: obtaining the current output voltage and the current compensation grade of the compensation type alternating current voltage stabilizer, and subtracting the rated voltage from the current output voltage of the compensation type alternating current voltage stabilizer to obtain a voltage difference value; if the voltage difference value is larger than the preset difference value, reducing the current compensation grade by the preset grade to obtain a second target compensation grade; if the voltage difference value is smaller than the negative preset difference value, the current compensation grade is increased by the preset grade to obtain a second target compensation grade; controlling the compensation grade of the compensation type alternating current voltage stabilizer to be switched to a second target compensation grade; wherein the preset difference is a positive value.
In the embodiment of the invention, when the mains voltage does not suddenly change, the compensation grade of the compensation type voltage stabilizer is adjusted step by step through the loop. If the voltage difference is larger than the preset difference, namely the output voltage is higher, the compensation grade of the compensation type alternating current voltage stabilizer is reduced, and the compensation voltage is reduced. If the voltage difference value is smaller than the negative preset difference value, the output voltage is low, the compensation grade of the compensation type alternating current voltage stabilizer is increased, the compensation voltage is increased, fine adjustment is carried out on the compensation grade through closed-loop control, the adjustment precision is higher, and the adjustment is more stable.
During closed-loop control each time, the preset grade can be increased or decreased according to the magnitude of the voltage difference value, and the voltage can be regulated step by step to realize stable output of the voltage. Wherein, the preset level may be level 1. Specifically, the preset level may be set according to a voltage difference between each compensation level and a practical application requirement, which is not described herein again.
In some embodiments, controlling the compensation level of the compensated ac voltage regulator to switch to the second target compensation level may include:
1. determining the target switching state of each grade control switching tube in the compensation type alternating current voltage stabilizer according to the second target compensation grade; the target switch state is on or off;
2. taking the first peak value moment of the mains voltage after the current moment as a first target moment;
3. taking the second peak value moment of the mains voltage after the current moment as a second target moment;
4. at a first target moment, controlling the switch tubes of all levels with the switch states of the control targets being disconnected to be disconnected;
5. and at the second target moment, controlling the switch tubes of all the grades with the switch states of the control targets as the on states to be switched on.
In the embodiment of the invention, in order to prevent the damage to equipment caused by the simultaneous conduction of the switching tubes of the upper bridge arm and the lower bridge arm in the compensation grade adjusting process, the switching tubes of the corresponding bridge arms are controlled to be switched off at the first peak moment after the current moment, and the switching tubes of the corresponding bridge arms are controlled to be switched on at the second peak moment, so that the switching tubes of the same bridge arm can be prevented from being switched on at the same time, and the safety is improved.
Meanwhile, as can be seen from the above, when the commercial power does not suddenly change, the time of loop control each time is at least two commercial power cycles. In the embodiment of the invention, if the commercial power suddenly changes, no matter which stage the commercial power is in, the compensation grade of the compensation type alternating current voltage stabilizer can be directly switched, and the switching is not required to be carried out until the current loop control cycle is finished, so that the regulation speed is further improved.
In some embodiments, the step of loop control may further comprise:
acquiring the current compensation level of the compensation type alternating current voltage stabilizer; and if the current compensation grade is the preset highest compensation grade or the preset lowest compensation grade, controlling the compensation type alternating current voltage stabilizer to switch to the protection mode.
The embodiment of the invention can acquire the compensation level of the compensation type alternating current voltage stabilizer in real time, and if the compensation level reaches the highest level or the lowest level, which indicates that the input voltage or equipment hardware (such as a thyristor) possibly has a fault, the compensation type alternating current voltage stabilizer is controlled to enter a protection mode. Wherein the protection mode may be an input breaker open, exiting the current control logic.
In some embodiments, after S102, the method may further include:
s104: and performing loop regulation on the compensation type alternating current voltage stabilizer according to the output voltage of the compensation type alternating current voltage stabilizer until the absolute value of the difference value between the output voltage of the compensation type alternating current voltage stabilizer and the rated voltage is smaller than a preset difference value.
Under the influence of output load, transformer parameter errors and the like, the compensation grade (open-loop control) directly calculated according to the mains voltage may have errors, so that large deviation may exist between the output voltage and the rated voltage. Therefore, in the embodiment of the invention, after the level of the compensation type alternating current voltage stabilizer is coarsely adjusted according to the mains voltage, the compensation level of the compensation type voltage stabilizer can be finely adjusted by adopting closed-loop control, so that the output voltage of the compensation type voltage stabilizer is stable.
In some embodiments, the method may further include:
s105: and when the compensation type alternating current voltage stabilizer is detected to be powered on, acquiring the current mains voltage, determining a third target compensation grade according to the current mains voltage, and controlling the compensation grade of the compensation type alternating current voltage stabilizer to be switched to the third target compensation grade.
When the compensation type alternating current voltage stabilizer in the embodiment of the invention is electrified, if closed-loop control is adopted, the compensation level is adjusted step by step, and the adjusting time is longer, so that the compensation level can be roughly adjusted according to the input commercial power voltage during electrification, the adjusting time is greatly shortened on the premise of ensuring the normal output of the output voltage, and the rapid adjustment of the voltage is realized.
In some embodiments, after S105, the method may further include:
s106: and performing loop regulation on the compensation type alternating current voltage stabilizer according to the output voltage of the compensation type alternating current voltage stabilizer until the absolute value of the difference value between the output voltage of the compensation type alternating current voltage stabilizer and the rated voltage is smaller than a preset difference value.
In the same way, after the power-on, the compensation grade of the compensation type alternating current voltage stabilizer is directly set according to the input voltage, the compensation grade is not accurate enough, and the compensation grade can be finely set through closed-loop control, so that the stable output of the compensation type alternating current voltage stabilizer is realized.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
Corresponding to the above-mentioned control method of the compensated ac voltage regulator, referring to fig. 4, an embodiment of the present invention further provides a control apparatus of the compensated ac voltage regulator, including:
a variation obtaining module 21, configured to obtain voltage variations of the mains voltage before and after a preset time interval;
the first compensation grade determining module 22 is configured to determine a first target compensation grade according to the current mains voltage and control the compensation grade of the compensation type ac voltage regulator to be switched to the first target compensation grade if the voltage variation is greater than a preset variation;
and a second compensation level determining module 23, configured to perform loop adjustment on the compensation level of the compensation ac voltage regulator according to the output voltage of the compensation ac voltage regulator until an absolute value of a difference between the output voltage of the compensation ac voltage regulator and the rated voltage is smaller than a preset difference if the voltage variation is not greater than the preset variation.
In some embodiments, the first compensation level determining module 22 may include:
a level determining unit 221, configured to determine a first target compensation level according to the current mains voltage and a preset compensation level table if the voltage variation is greater than a preset variation;
and a level adjusting unit 222, configured to control the compensation level of the compensated ac voltage regulator to switch to the first target compensation level.
In some embodiments, the second compensation level determining module 23 may include:
a loop control unit 231, configured to, if the voltage variation is not greater than the preset variation, repeat the loop control step until an absolute value of a difference between the output voltage of the compensation ac voltage regulator and the rated voltage is smaller than a preset difference;
the step of loop control may comprise: obtaining the current output voltage and the current compensation grade of the compensation type alternating current voltage stabilizer, and subtracting the rated voltage from the current output voltage of the compensation type alternating current voltage stabilizer to obtain a voltage difference value; if the voltage difference value is larger than the preset difference value, reducing the current compensation grade by the preset grade to obtain a second target compensation grade; if the voltage difference value is smaller than the negative preset difference value, the current compensation grade is increased by the preset grade to obtain a second target compensation grade; controlling the compensation grade of the compensation type alternating current voltage stabilizer to be switched to a second target compensation grade; wherein the preset difference is a positive value.
In some embodiments, the loop control unit 231 may be specifically configured to:
1. determining the target switching state of each grade control switching tube in the compensation type alternating current voltage stabilizer according to the second target compensation grade; the target switch state is on or off;
2. taking the first peak value moment of the mains voltage after the current moment as a first target moment;
3. taking the second peak value moment of the mains voltage after the current moment as a second target moment;
4. at a first target moment, controlling the switch tubes of all levels with the off state of the target switch to be off;
5. and at the second target moment, controlling the switch tubes of the grades of which the switch states of the control targets are switched on to be switched on.
In some embodiments, the step of loop control may further comprise:
acquiring the current compensation level of the compensation type alternating current voltage stabilizer; and if the current compensation grade is the preset highest compensation grade or the preset lowest compensation grade, controlling the compensation type alternating current voltage stabilizer to switch to the protection mode.
In some embodiments, the apparatus may further include:
and the third level adjusting module 24 is configured to perform loop adjustment on the compensation level of the compensation type ac voltage regulator according to the output voltage of the compensation type ac voltage regulator until the absolute value of the difference between the output voltage of the compensation type ac voltage regulator and the rated voltage is smaller than the preset difference.
In some embodiments, the apparatus may further include:
and the fourth level adjusting module 25 is configured to, when it is detected that the compensation type ac voltage regulator is powered on, obtain the current mains voltage, determine a third target compensation level according to the current mains voltage, and set the compensation level of the compensation type ac voltage regulator to the third target compensation level.
It is obvious to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional units and modules is merely used as an example, and in practical applications, the above function distribution may be performed by different functional units and modules as needed, that is, the internal structure of the terminal device is divided into different functional units or modules to perform all or part of the above described functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only used for distinguishing one functional unit from another, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the above-mentioned apparatus may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
Fig. 5 is a schematic block diagram of a terminal device according to an embodiment of the present invention. As shown in fig. 5, the terminal device 4 of this embodiment includes: one or more processors 40, a memory 41, and a computer program 42 stored in the memory 41 and executable on the processors 40. The processor 40 executes the computer program 42 to implement the steps in the above-described embodiments of the compensated ac voltage regulator control method, such as the steps S101 to S103 shown in fig. 2. Alternatively, the processor 40, when executing the computer program 42, implements the functions of the modules/units in the above-described embodiment of the compensated ac voltage regulator control apparatus, such as the functions of the modules 21 to 23 shown in fig. 4.
Illustratively, the computer program 42 may be divided into one or more modules/units, which are stored in the memory 41 and executed by the processor 40 to accomplish the present application. One or more of the modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution of the computer program 42 in the terminal device 4. For example, the computer program 42 may be divided into the variation obtaining module 21, the first compensation level determining module 22, and the second level determining module 23.
A variation obtaining module 21, configured to obtain voltage variations of the mains voltage before and after a preset time interval;
the first compensation grade determining module 22 is configured to determine a first target compensation grade according to the current mains voltage and control the compensation grade of the compensation type ac voltage regulator to be switched to the first target compensation grade if the voltage variation is greater than a preset variation;
and a second compensation level determining module 23, configured to perform loop adjustment on the compensation level of the compensation ac voltage regulator according to the output voltage of the compensation ac voltage regulator until an absolute value of a difference between the output voltage of the compensation ac voltage regulator and the rated voltage is smaller than a preset difference if the voltage variation is not greater than the preset variation.
Other modules or units are not described in detail herein.
Terminal device 4 includes, but is not limited to, processor 40, memory 41. Those skilled in the art will appreciate that fig. 5 is only one example of a terminal device and does not constitute a limitation of terminal device 4 and may include more or fewer components than shown, or combine certain components, or different components, e.g., terminal device 4 may also include input devices, output devices, network access devices, buses, etc.
The Processor 40 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage 41 may be an internal storage unit of the terminal device, such as a hard disk or a memory of the terminal device. The memory 41 may also be an external storage device of the terminal device, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like provided on the terminal device. Further, the memory 41 may also include both an internal storage unit of the terminal device and an external storage device. The memory 41 is used for storing the computer program 42 and other programs and data required by the terminal device. The memory 41 may also be used to temporarily store data that has been output or is to be output.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed terminal device and method may be implemented in other ways. For example, the above-described terminal device embodiments are merely illustrative, and for example, a module or a unit may be divided into only one logical function, and may be implemented in other ways, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method according to the embodiments described above may be implemented by a computer program, which is stored in a computer readable storage medium and used by a processor to implement the steps of the embodiments of the methods described above. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may include any suitable increase or decrease as required by legislation and patent practice in the jurisdiction, for example, in some jurisdictions, computer readable media may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. A control method of a compensated AC voltage regulator is characterized by comprising the following steps:
acquiring voltage variation of mains voltage before and after a preset time interval;
if the voltage variation is larger than the preset variation, determining a first target compensation grade according to the current mains voltage, and controlling the compensation grade of the compensation type alternating current voltage stabilizer to be switched to the first target compensation grade;
and if the voltage variation is not greater than the preset variation, performing loop regulation on the compensation level of the compensation type alternating current voltage stabilizer according to the output voltage of the compensation type alternating current voltage stabilizer until the absolute value of the difference between the output voltage of the compensation type alternating current voltage stabilizer and the rated voltage is smaller than the preset difference.
2. The method as claimed in claim 1, wherein if the voltage variation is greater than a predetermined variation, determining a first target compensation level according to a current utility voltage, and controlling the compensation level of the ac voltage regulator to switch to the first target compensation level comprises:
if the voltage variation is larger than the preset variation, determining the first target compensation level according to the current mains voltage and a preset compensation level table;
and controlling the compensation grade of the compensation type alternating current voltage stabilizer to be switched to the first target compensation grade.
3. The method as claimed in claim 1, wherein if the voltage variation is not greater than the predetermined variation, performing loop adjustment on the compensation level of the ac voltage regulator according to the output voltage of the ac voltage regulator until the absolute value of the difference between the output voltage of the ac voltage regulator and the rated voltage is less than a predetermined difference, comprises:
if the voltage variation is not greater than the preset variation, repeating the step of loop control until the absolute value of the difference between the output voltage of the compensation type alternating current voltage stabilizer and the rated voltage is smaller than the preset difference;
the loop control step includes: obtaining the current output voltage and the current compensation grade of the compensation type alternating current voltage stabilizer, and subtracting the rated voltage from the current output voltage of the compensation type alternating current voltage stabilizer to obtain a voltage difference value; if the voltage difference value is larger than the preset difference value, reducing the current compensation grade by a preset grade to obtain a second target compensation grade; if the voltage difference value is smaller than a negative preset difference value, increasing the current compensation grade by the preset grade to obtain a second target compensation grade; controlling the compensation grade of the compensation type alternating current voltage stabilizer to be switched to the second target compensation grade; wherein the preset difference is a positive value.
4. The method as claimed in claim 3, wherein said controlling the compensation level of the compensated ac voltage regulator to switch to the second target compensation level comprises:
determining the target switching state of each grade control switching tube in the compensation type alternating current voltage stabilizer according to the second target compensation grade; the target switch state is on or off;
taking the first peak value moment of the mains voltage after the current moment as a first target moment;
taking the second peak value moment of the mains voltage after the current moment as a second target moment;
at the first target moment, controlling the switch tubes of all levels with the switch states of the control targets being off to be switched off;
and controlling the switch tubes of all the grades of which the switch states of the control targets are switched on to be switched on at the second target moment.
5. The compensated ac regulator control method of claim 3, wherein the loop control step further comprises:
acquiring the current compensation level of the compensation type alternating current voltage stabilizer; and if the current compensation grade is a preset highest compensation grade or a preset lowest compensation grade, controlling the compensation type alternating current voltage stabilizer to be switched into a protection mode.
6. The compensated ac voltage regulator control method according to any one of claims 1 to 5, wherein after determining a first target compensation level according to a current utility voltage and controlling the compensation level of the compensated ac voltage regulator to switch to the first target compensation level if the voltage variation is greater than a preset variation, the method further comprises:
and performing loop regulation on the compensation grade of the compensation type alternating current voltage stabilizer according to the output voltage of the compensation type alternating current voltage stabilizer until the absolute value of the difference between the output voltage of the compensation type alternating current voltage stabilizer and the rated voltage is smaller than a preset difference.
7. The compensated ac regulator control method of any one of claims 1 to 5, further comprising:
when the compensation type alternating current voltage stabilizer is detected to be powered on, the current mains voltage is obtained, a third target compensation grade is determined according to the current mains voltage, and the compensation grade of the compensation type alternating current voltage stabilizer is controlled to be switched to the third target compensation grade.
8. A compensated AC regulator control apparatus, comprising:
the variable quantity acquisition module is used for acquiring voltage variable quantities of the mains voltage before and after a preset time interval;
the first compensation grade determining module is used for determining a first target compensation grade according to the current mains voltage and controlling the compensation grade of the compensation type alternating current voltage stabilizer to be switched into the first target compensation grade if the voltage variation is larger than a preset variation;
and the second compensation grade determining module is used for performing loop regulation on the compensation grade of the compensation type alternating current voltage stabilizer according to the output voltage of the compensation type alternating current voltage stabilizer if the voltage variation is not greater than the preset variation until the absolute value of the difference between the output voltage of the compensation type alternating current voltage stabilizer and the rated voltage is smaller than the preset difference.
9. A control terminal comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the compensated ac voltage regulator control method according to any one of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, in which a computer program is stored, wherein the computer program, when being executed by a processor, implements the steps of the control method of the compensated ac voltage regulator according to any one of claims 1 to 7.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115833363A (en) * | 2023-02-14 | 2023-03-21 | 长沙巨翊医疗科技有限公司 | Automatic switching method and system for multiple power supply modes |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115833363A (en) * | 2023-02-14 | 2023-03-21 | 长沙巨翊医疗科技有限公司 | Automatic switching method and system for multiple power supply modes |
| CN115833363B (en) * | 2023-02-14 | 2023-05-16 | 长沙巨翊医疗科技有限公司 | Automatic switching method and system for multiple power supply modes |
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