CN113224959B - Inverter control method and UPS - Google Patents
Inverter control method and UPS Download PDFInfo
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- CN113224959B CN113224959B CN202110432471.XA CN202110432471A CN113224959B CN 113224959 B CN113224959 B CN 113224959B CN 202110432471 A CN202110432471 A CN 202110432471A CN 113224959 B CN113224959 B CN 113224959B
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
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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
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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Abstract
The invention is suitable for the technical field of UPS, and provides an inverter control method and a UPS, wherein an inverter is controlled by an instantaneous value loop, and the instantaneous value loop is provided with a limiter; the control method comprises the following steps: sampling trigger state signals of a current limiting protection device of an inverter within a first preset time to obtain a first number of trigger state values; the first quantity of trigger state values comprises a second quantity of first preset values, and if the second quantity is larger than the first preset quantity, the amplitude limiting value of the amplitude limiter of the instantaneous value ring of the inverter is reduced to a first preset amplitude value; when the inverter is connected with the RCD load, if the hardware current limiting state is entered and the time is longer, the amplitude limiting value of the instantaneous value loop of the inverter is reduced, so that the inverter software is limited, the hardware current limiting state is exited, the device failure caused by long-term operation of the hardware current limiting protection device is prevented, and the reliability of the device is improved.
Description
Technical Field
The invention belongs to the technical field of UPS (uninterrupted Power supply), and particularly relates to an inverter control method and UPS.
Background
The RCD load is a nonlinear analog load, and can be used for testing power supply equipment such as UPS and the like, and knowing the actual working capacity of the power supply equipment when the power supply equipment is provided with nonlinear loads such as computers, network equipment and the like. Referring to fig. 1, when a sinusoidal voltage is applied to an RCD load, the current of the RCD load is intermittent, spike.
In the prior art, when an inverter is connected to an RCD load, in order to prevent equipment damage caused by peak current of the RCD load, a hardware current limiting protection device is generally provided, and when the current of the RCD load is greater than a preset value, hardware current limiting is triggered. However, when the RCD load is fully loaded, the hardware current limiting protection device may work for a long time, resulting in failure of the device, and reducing the reliability of the device.
Disclosure of Invention
In view of the above, the embodiment of the invention provides an inverter control method and a UPS, so as to solve the problems that in the prior art, when an inverter is connected to an RCD load, a hardware current limiting circuit can work for a long time, so that a device is invalid, and the reliability of a system is reduced.
A first aspect of the embodiment of the present invention provides an inverter control method, where an inverter is controlled by an instantaneous value loop, and the instantaneous value loop is provided with a limiter; the inverter control method includes:
sampling trigger state signals of a current limiting protection device of an inverter within a first preset time to obtain a first number of trigger state values; when the trigger state value is a first preset value, the current limiting protection device is triggered; when the trigger state value is a second preset value, the current limiting protection device is not triggered;
the first quantity of trigger state values comprises a second quantity of first preset values, and if the second quantity is larger than the first preset quantity, the amplitude limiting value of the amplitude limiter of the instantaneous value ring of the inverter is reduced to a first preset amplitude value;
the first preset number is larger than the number of periods of the inverter in the first preset time.
A second aspect of the embodiment of the present invention provides an inverter control device, in which an inverter is controlled by an instantaneous value loop, and the instantaneous value loop is provided with a limiter; the inverter control device includes:
the first sampling module is used for sampling trigger state signals of the current-limiting protection device of the inverter within a first preset time to obtain a first number of trigger state values; when the trigger state value is a first preset value, the current limiting protection device is triggered; when the trigger state value is a second preset value, the current limiting protection device is not triggered;
the first amplitude limiting adjustment module is used for reducing the amplitude limiting value of the amplitude limiter of the instantaneous value ring of the inverter to a first preset amplitude value if the first quantity of the trigger state values contains a first preset value of a second quantity, and the second quantity of the trigger state values is larger than the first preset value; the first preset number is larger than the number of periods of the inverter in the first preset time.
A third aspect of an embodiment of the present invention provides a UPS, including: a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the inverter control method as provided in the first aspect of the embodiment of the invention when executing the computer program.
A fourth aspect of the embodiments of the present invention provides a computer-readable storage medium storing a computer program which, when executed by a processor, implements the steps of the inverter control method as provided in the first aspect of the embodiments of the present invention.
The embodiment of the invention provides an inverter control method, which comprises the following steps: sampling trigger state signals of a current limiting protection device of an inverter within a first preset time to obtain a first number of trigger state values; the first quantity of trigger state values comprises a second quantity of first preset values, and if the second quantity is larger than the first preset quantity, the amplitude limiting value of the amplitude limiter of the instantaneous value ring of the inverter is reduced to a first preset amplitude value; in the invention, when the inverter is connected with the RCD load, if the state of hardware current limitation is entered and the time is longer, the amplitude limiting value of the amplitude limiter of the instantaneous value ring of the inverter is reduced, so that the inverter enters the software current limitation and exits the hardware current limitation, the device failure caused by long-term operation of the hardware current limitation protection device is prevented, and the reliability of the device is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a waveform diagram of an RCD load;
fig. 2 is a schematic diagram of an implementation flow of an inverter control method according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an inverter control device according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a UPS provided by 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 the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present 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 illustrate the technical scheme of the invention, the following description is made by specific examples.
Referring to fig. 2, an embodiment of the present invention provides an inverter control method, in which an inverter is controlled by an instantaneous value loop, and the instantaneous value loop is provided with a limiter; the inverter control method includes:
s101: sampling trigger state signals of a current limiting protection device of an inverter within a first preset time to obtain a first number of trigger state values; when the trigger state value is a first preset value, the current limiting protection device is triggered; when the trigger state value is a second preset value, the current limiting protection device is not triggered;
s102: the first quantity of trigger state values comprises a second quantity of first preset values, and if the second quantity is larger than the first preset quantity, the amplitude limiting value of the amplitude limiter of the instantaneous value ring of the inverter is reduced to a first preset amplitude value;
the first preset number is larger than the number of periods of the inverter in the first preset time.
Because the current of the RCD load is intermittent and peak, the hardware current limiting protection device is triggered for a plurality of times within the preset time, so that the hardware current limiting protection device is intermittent and is in a working state for a long time, and the reliability is affected. In the embodiment of the invention, the trigger state signal of the current-limiting protection device is sampled within the first preset time, and if the sampled trigger state signal of the current-limiting protection device reaches the second preset number within the first preset time, which indicates that the hardware current-limiting protection device is triggered for a long time, the limiting value of the limiter of the instantaneous value ring of the inverter is reduced, so that the inverter is limited by software and exits from the hardware current limiting, the device failure caused by long-term operation of the hardware current-limiting protection device is prevented, and the reliability and stability of the device are improved. Meanwhile, the amplitude limiting of the inverter inevitably influences the output performance of the inverter, and the embodiment of the invention adjusts the amplitude limiting value of the amplitude limiter of the instantaneous value ring of the inverter only when the hardware current limiting is triggered for a long time, and improves the output performance of the inverter on the premise of ensuring that the hardware protection device does not work for a long time.
The first preset number can be determined according to the sampling frequency and the actual application requirement.
In some embodiments, the inverter control method may further include:
s103: sampling trigger state signals of the current limiting protection device of the inverter within a second preset time to obtain a third number of trigger state values;
s104: the third quantity of trigger state values comprises a fourth quantity of first preset values, and if the fourth quantity is smaller than the second preset quantity, the amplitude limiting value of the amplitude limiter of the instantaneous value ring of the inverter is increased to a second preset amplitude value;
the first preset amplitude value is smaller than the second preset amplitude value; the first preset number is greater than the second preset number.
When the inverter is recovered to be normal, the hardware protection device is not triggered for a long time, so that the amplitude limiting value of the amplitude limiter of the instantaneous value ring of the inverter is recovered to be normal (second preset amplitude), the output of the inverter is recovered to be normal, and the output performance of the inverter is ensured.
In some embodiments, the first preset time is greater than the second preset time.
After the inverter is recovered to be normal, the hardware protection device is not triggered or is triggered for a small number of times, so that the second preset time can be properly shortened relative to the first preset time, the application requirement can be met, and the control efficiency is improved.
In some embodiments, the inverter control method may further include:
s105: acquiring the load rate of an inverter and the PF value of the inverter;
s106: if the load rate of the inverter and the PF value of the inverter meet the preset conditions, the amplitude limiting value of the amplitude limiter of the instantaneous value ring of the inverter is increased to a second preset amplitude value;
wherein the first preset amplitude is smaller than the second preset amplitude.
In some embodiments, the preset conditions are: the load rate of the inverter is smaller than a preset load rate, and the PF value of the inverter is larger than the preset PF value.
Because the hardware protection device is not triggered or the triggering times are less after the inverter is recovered to be normal, for example, when the hardware protection device is not triggered, the triggering state signal of the current-limiting protection device is 0 or low level, and the detection accuracy is not high enough. Meanwhile, when the inverter is recovered to be normal (the capacitive load is less), the hardware protection device is not triggered or the triggering times are less, the load rate of the inverter is smaller, the PF value is larger, so that whether the inverter is recovered to be normal or not can be judged through the load rate and the PF value, and the judgment result is accurate. For example, the preset PF value may be 0.9 and the preset load factor may be 0.5.
In some embodiments, prior to S101, the inverter control method may further include:
s107: acquiring a current limiting protection signal sent by a current limiting protection device;
s108: and generating a trigger state signal of the current limiting protection device according to the current limiting protection signal.
When the hardware current limiting protection device is triggered, the change of the electric signal is necessarily brought, and the embodiment of the invention can also directly acquire the current limiting protection signal sent by the hardware current limiting protection device and determine the triggering state signal of the current limiting protection device according to the current limiting protection signal. For example, when the current limiting protection device is triggered, the current limiting protection signal is high, the trigger state signal is 1, and vice versa is 0.
In some embodiments, a limiter is provided at the output of the instantaneous value loop.
Specifically, the limiter can be arranged at the front end or the rear end of the instantaneous value ring according to practical application requirements.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.
Referring to fig. 3, the embodiment of the invention also provides an inverter control device, wherein the inverter is controlled by an instantaneous value loop, and the instantaneous value loop is provided with a limiter; the inverter control device includes:
the first sampling module 21 is configured to sample a trigger state signal of the current limiting protection device of the inverter within a first preset time, so as to obtain a first number of trigger state values; when the trigger state value is a first preset value, the current limiting protection device is triggered; when the trigger state value is a second preset value, the current limiting protection device is not triggered;
the first clipping adjustment module 22 is configured to reduce the clipping value of the clipping device of the instantaneous value loop of the inverter to a first preset amplitude value if the first number of trigger state values includes a second number of first preset values and the second number is greater than the first preset number; the first preset number is larger than the number of periods of the inverter in the first preset time.
In some embodiments, the inverter control apparatus may further include:
the second sampling module 23 is configured to sample the trigger state signal of the current limiting protection device of the inverter within a second preset time, so as to obtain a third number of trigger state values;
the second clipping adjustment module 24 is configured to increase the clipping value of the clipping device of the instantaneous value loop of the inverter to a second preset amplitude value if the third number of trigger state values includes a fourth number of first preset values and the fourth number is smaller than the second preset number;
the first preset amplitude value is smaller than the second preset amplitude value; the first preset number is greater than the second preset number.
In some embodiments, the first preset time is greater than the second preset time.
In some embodiments, the inverter control apparatus may further include:
a parameter obtaining module 25, configured to obtain a load factor of the inverter and a PF value of the inverter;
the third clipping adjustment module 26 is configured to increase the clipping value of the clipping device of the instantaneous value loop of the inverter to a second preset amplitude value if the load factor of the inverter and the PF value of the inverter meet preset conditions; wherein the first preset amplitude is smaller than the second preset amplitude.
In some embodiments, the preset conditions are:
the load rate of the inverter is smaller than a preset load rate, and the PF value of the inverter is larger than the preset PF value.
In some embodiments, the inverter control apparatus may further include:
a current limiting protection signal acquisition module 27, configured to acquire a current limiting protection signal sent by the current limiting protection device;
the trigger state signal generating module 28 is configured to generate a trigger state signal of the current limiting protection device according to the current limiting protection signal.
In some embodiments, a limiter is provided at the output of the instantaneous value loop.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional allocation may be performed by different functional units and modules according to needs, i.e. the internal structure of the UPS is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above device may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
Fig. 4 is a schematic block diagram of a UPS provided in an embodiment of the invention. As shown in fig. 4, the UPS 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 processor 40. The steps in the respective inverter control method embodiments described above, such as steps S101 to S102 shown in fig. 2, are implemented when the processor 40 executes the computer program 42. Alternatively, the processor 40, when executing the computer program 42, performs the functions of the modules/units of the inverter control device embodiments described above, such as the functions of the modules 21 to 22 shown in fig. 3.
Illustratively, the computer program 42 may be partitioned into one or more modules/units, which are stored in the memory 41 and executed by the processor 40 to complete the present application. One or more of the modules/units may be a series of computer program instruction segments capable of performing particular functions to describe the execution of the computer program 42 in the UPS. For example, the computer program 42 may be split into a first sampling module 21 and a first clipping adjustment module 22;
the first sampling module 21 is configured to sample a trigger state signal of the current limiting protection device of the inverter within a first preset time, so as to obtain a first number of trigger state values; when the trigger state value is a first preset value, the current limiting protection device is triggered; when the trigger state value is a second preset value, the current limiting protection device is not triggered;
the first clipping adjustment module 22 is configured to reduce the clipping value of the clipping device of the instantaneous value loop of the inverter to a first preset amplitude value if the first number of trigger state values includes a second number of first preset values and the second number is greater than the first preset number; the first preset number is larger than the number of periods of the inverter in the first preset time.
Other modules or units are not described in detail herein.
UPS includes, but is not limited to, a processor 40, a memory 41. It will be appreciated by those skilled in the art that fig. 4 is merely an example of a UPS, and is not intended to be limiting of a UPS, and may include more or fewer components than shown, or may combine certain components, or different components, e.g., a UPS may further include input devices, output devices, network access devices, buses, etc.
The processor 40 may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 41 may be an internal storage unit of the UPS, such as a hard disk or a memory of the UPS. The memory 41 may also be an external storage device of the UPS, such as a plug-in hard disk provided on the UPS, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash Card (Flash Card), or the like. Further, the memory 41 may also include both internal storage units and external storage devices of the UPS. The memory 41 is used to store a computer program 42 and other programs and data required by the UPS. The memory 41 may also be used to temporarily store data that has been output or is to be output.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
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 solution. 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 herein, it should be understood that the disclosed UPS and method may be implemented in other ways. For example, the UPS embodiments described above are merely illustrative, e.g., the division of modules or units is merely a logical functional division, and there may be additional divisions of actual implementation, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present application may implement all or part of the flow of the method of the above embodiment, or may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, where the computer program, when executed by a processor, may implement the steps of each of the method embodiments described above. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, executable files or in some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the content of the computer readable medium can be appropriately increased or decreased according to the requirements of the jurisdiction's jurisdiction and the patent practice, for example, in some jurisdictions, the computer readable medium does not include electrical carrier signals and telecommunication signals according to the jurisdiction and the patent practice.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; 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 scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (9)
1. An inverter control method is characterized in that the inverter is controlled by an instantaneous value loop, and the instantaneous value loop is provided with a limiter; the inverter control method includes:
sampling trigger state signals of a current limiting protection device of the inverter within a first preset time to obtain a first number of trigger state values; when the trigger state value is a first preset value, the current limiting protection device is triggered; when the trigger state value is a second preset value, the current limiting protection device is not triggered;
the first number of trigger state values comprises a second number of first preset values, and if the second number is larger than the first preset number, the amplitude limiting value of the amplitude limiter of the instantaneous value ring of the inverter is reduced to a first preset amplitude value;
the first preset number is greater than the number of periods of the inverter in the first preset time.
2. The inverter control method according to claim 1, characterized in that the inverter control method further comprises:
sampling trigger state signals of the current limiting protection device of the inverter within a second preset time to obtain a third number of trigger state values;
the third quantity of trigger state values comprises a fourth quantity of first preset values, and if the fourth quantity is smaller than the second preset quantity, the amplitude limiting value of the amplitude limiter of the instantaneous value ring of the inverter is increased to a second preset amplitude value;
wherein the first preset amplitude is smaller than the second preset amplitude; the first preset number is greater than the second preset number.
3. The inverter control method according to claim 2, wherein the first preset time is longer than the second preset time.
4. The inverter control method according to claim 1, characterized in that the inverter control method further comprises:
acquiring the load rate of the inverter and the PF value of the inverter;
if the load rate of the inverter and the PF value of the inverter meet preset conditions, the amplitude limiting value of an amplitude limiter of an instantaneous value ring of the inverter is increased to a second preset amplitude value;
wherein the first preset amplitude is smaller than the second preset amplitude;
the preset conditions are as follows:
the load rate of the inverter is smaller than a preset load rate, and the PF value of the inverter is larger than the preset PF value.
5. The inverter control method according to any one of claims 1 to 4, wherein before sampling the trigger state signal of the current limiting protection device of the inverter for a first preset time to obtain a first number of trigger state values, the inverter control method further comprises:
acquiring a current limiting protection signal sent by the current limiting protection device;
and generating a trigger state signal of the current limiting protection device according to the current limiting protection signal.
6. The inverter control method according to any one of claims 1 to 4, characterized in that the limiter is provided at an output of the instantaneous value ring.
7. An inverter control device is characterized in that the inverter is controlled by an instantaneous value loop, and the instantaneous value loop is provided with a limiter; the inverter control device includes:
the first sampling module is used for sampling trigger state signals of the current limiting protection device of the inverter within a first preset time to obtain a first number of trigger state values; when the trigger state value is a first preset value, the current limiting protection device is triggered; when the trigger state value is a second preset value, the current limiting protection device is not triggered;
the first amplitude limiting adjustment module is used for reducing the amplitude limiting value of the amplitude limiter of the instantaneous value loop of the inverter to a first preset amplitude value if the first quantity of trigger state values contains a first preset value of a second quantity, and the second quantity of trigger state values is larger than the first preset value; the first preset number is greater than the number of periods of the inverter in the first preset time.
8. UPS comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the inverter control method according to any of claims 1 to 6 when executing the computer program.
9. A computer-readable storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the inverter control method according to any one of claims 1 to 6.
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| US9444323B2 (en) * | 2014-01-22 | 2016-09-13 | Solidstate Controls, Llc | Power conversion system having a harmonic distortion limiter |
| CN104795882B (en) * | 2015-03-17 | 2018-07-06 | 深圳市伊力科电源有限公司 | A kind of ups system energy-saving control method and system |
| CN104779823B (en) * | 2015-05-08 | 2018-02-23 | 阳光电源股份有限公司 | Control method, control device and the photovoltaic inverting system of photovoltaic DC-to-AC converter |
| CN106469915B (en) * | 2015-08-13 | 2019-07-26 | 中国电力科学研究院 | A kind of adaptive dynamic reactive compensating method of photovoltaic combining inverter |
| CN107154642B (en) * | 2017-06-08 | 2020-02-14 | 合肥阳光智维科技有限公司 | Photovoltaic grid-connected power generation system and direct current bus voltage control method and device thereof |
| CN107483009B (en) * | 2017-08-25 | 2020-05-22 | 阳光电源股份有限公司 | Optimizer bypass control method of photovoltaic power generation system |
| CN109713710B (en) * | 2017-10-26 | 2021-04-13 | 阳光电源股份有限公司 | Communication host and photovoltaic power generation system |
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