CN114243889A - Uninterruptible power supply load adaptability regulation control method and system - Google Patents
Uninterruptible power supply load adaptability regulation control method and system Download PDFInfo
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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
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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Abstract
The invention provides an adaptive regulation control method for uninterrupted power supply load, which comprises the following steps: step S1, detecting the characteristic frequency of the load under the condition that the characteristic frequency adjusting function is enabled; and step S2, according to the characteristic frequency, adjusting the sampling frequency of the uninterrupted power supply to make the sampling frequency and the characteristic frequency of the load form a non-multiple relation. The invention provides a method for adjusting and controlling the adaptability of an uninterruptible power supply load, which comprises the steps of firstly detecting the characteristic frequency of the load, and then utilizing the detected characteristic frequency to feed back and adjust the sampling frequency of the uninterruptible power supply, so that the sampling frequency of the uninterruptible power supply and the characteristic frequency of the load are in a non-frequency multiplication relation, thereby avoiding the phenomenon that the algorithm control strength is weakened or even out of control, meeting the diversity of the load, strengthening the adaptability of the uninterruptible power supply to the load and increasing the stability of the uninterruptible power supply.
Description
Technical Field
The invention relates to the technical field of uninterruptible power supplies, in particular to an uninterruptible power supply load adaptability adjusting control method and system.
Background
The data center is a place for processing data such as acquisition, processing, storage, transmission, retrieval and the like, plays an increasingly important role in various industries in the current society, even is related to the development of the industries, and becomes an indispensable part. The stability of the UPS serving as a core device for guaranteeing the power supply of the data center is crucial, and as a last protective barrier in a power supply link, the UPS must be capable of stably and reliably supplying power to a subsequent load continuously. When different load characteristics are faced, phenomena such as oscillation, output THDI, THDU index deterioration, jitter and the like can occur to the uninterruptible power supply with poor stability, and the uninterruptible power supply can be down in a serious condition, even causes the damage of subsequent loads.
When the uninterruptible power supply on the market faces loads with different characteristics, the control change is limited, the control is still performed by a conventional control algorithm, and due to the load diversity of a user site, when the characteristic frequency of the load of the UPS and the characteristic frequency of the UPS have a multiple relation, the control strength of a UPS control loop is possibly weakened, the output waveform index is deteriorated, even the phenomenon of runaway is caused, and the damage is great. For the problem of such mismatch, a general solution is that a research and development worker changes a control parameter in the field according to the characteristics of a load to change the gain of a control loop for matching the implemented load, and due to the diversity of the load, the implementation cannot be performed universally, and the field temporary rectification is very troublesome and will increase additional cost.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a method and a system for adjusting and controlling the adaptability of the load of the uninterruptible power supply, which adjust and control the algorithm by effectively detecting the characteristics of the load so as to meet the requirements of the stability of the uninterruptible power supply under different load characteristics.
The embodiment of the invention provides an adaptive regulation control method for uninterrupted power supply load, which comprises the following steps:
step S1, detecting the characteristic frequency of the load under the condition that the characteristic frequency adjusting function is enabled; and
and step S2, adjusting the sampling frequency of the uninterrupted power supply according to the characteristic frequency to enable the sampling frequency to be in a non-multiple relation with the characteristic frequency of the load.
In the method for controlling adaptive adjustment of load of an uninterruptible power supply provided by the present invention, the step S1 includes:
step S11, sampling the current signal of the load at a first sampling frequency;
and step S12, calculating the characteristic frequency of the load through the sampled signals.
In the method for controlling adaptive regulation of load of an uninterruptible power supply according to the present invention, in step S11, when the characteristic frequency of the uninterruptible power supply is detected, the inverter control of the uninterruptible power supply enters a special control mode.
In the method for controlling adaptive adjustment of load of uninterruptible power supply provided by the present invention, in step S11, a characteristic frequency is detected by a dedicated sampling chip.
According to another aspect of the present invention, there is also provided an uninterruptible power supply load adaptive regulation control system, including:
the characteristic frequency detection module is used for detecting the characteristic frequency of the load under the condition that the characteristic frequency adjusting function is enabled; and
and the adjusting module is used for adjusting the sampling frequency of the uninterruptible power supply according to the characteristic frequency so that the sampling frequency and the characteristic frequency of the load form a non-multiple relation.
In the adaptive regulation control system for load of uninterruptible power supply provided by the present invention, the characteristic frequency detection module comprises:
the sampling unit is used for sampling a current signal of a load at a first sampling frequency;
and the calculating unit is used for calculating the characteristic frequency of the load through the sampled signals.
In the adaptive regulation control system for the load of the uninterruptible power supply, when the sampling unit detects the characteristic frequency through the uninterruptible power supply, the inversion control of the uninterruptible power supply enters a special control mode.
In the adaptive regulation control system for the load of the uninterruptible power supply, the sampling unit detects the characteristic frequency through a special sampling chip.
According to another aspect of the present invention, there is also provided an uninterruptible power supply load adaptation control system, including at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the one processor to cause the at least one processor to perform the uninterruptible power supply load adaptation control method as described above.
According to yet another aspect of the present invention, there is also provided a non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform the uninterruptible power supply load adaptive regulation control method as described above.
The embodiment of the invention has the following beneficial effects: the invention provides a method for adjusting and controlling the adaptability of an uninterruptible power supply load, which comprises the steps of firstly detecting the characteristic frequency of the load, and then utilizing the detected characteristic frequency to feed back and adjust the sampling frequency of the uninterruptible power supply, so that the sampling frequency of the uninterruptible power supply and the characteristic frequency of the load are in a non-frequency multiplication relation, thereby avoiding the phenomenon that the algorithm control strength is weakened or even out of control, meeting the diversity of the load, strengthening the adaptability of the uninterruptible power supply to the load and increasing the stability of the uninterruptible power supply.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, 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 can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart illustrating an adaptive regulation control method for an ups load according to an embodiment of the present invention;
FIG. 2 is a sampling diagram of frequency-doubled continuous waveforms;
FIG. 3 is a sample plot of a frequency multiplied discontinuous waveform;
FIG. 4 is a non-frequency-doubled discontinuous waveform sampling plot;
fig. 5 is a schematic diagram of an adaptive regulation control system for an ups load according to an embodiment of the present invention;
fig. 6 is a block diagram illustrating a specific schematic diagram of an adaptive regulation control system for an ups load according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The user-side loads of an uninterruptible power supply are diversified, and different loads may exhibit different characteristic frequencies, for example. For AC/DC switch power supply load, the control frequency can be regarded as characteristic frequency, therefore, the invention adopts a method of automatically adjusting the sampling interrupt frequency of the uninterrupted power supply aiming at different load characteristic frequencies, so as to avoid the phenomenon that the algorithm control strength is weakened or even out of control because the sampling interrupt frequency of the uninterrupted power supply is in multiple relation with the characteristic frequency of the load.
Fig. 1 is a flowchart illustrating an adaptive regulation control method for an ups load according to an embodiment of the present invention. As shown in fig. 1, the method for controlling the adaptive regulation of the load of the uninterruptible power supply provided by the present invention includes the following steps:
step S1, detecting the characteristic frequency of the load when the characteristic frequency adjustment function is enabled.
And step S2, adjusting the sampling frequency of the uninterrupted power supply according to the characteristic frequency to enable the sampling frequency to be in a non-multiple relation with the characteristic frequency of the load.
Specifically, in one embodiment of the present invention, a characteristic frequency of the load is first determined. According to shannon's sampling law, if the signal is band-limited and the sampling frequency is higher than one time the highest frequency of the signal, the original continuous signal can be completely reconstructed from the sampled samples. Therefore, to accurately obtain the characteristic frequency of the load, it is necessary to sample the current signal of the load at a sampling frequency 2 times the characteristic frequency of the load, and restore the characteristic frequency of the load from the sampled signal. Therefore, the step S1 includes:
step S11, sampling a current signal of a load at a first sampling frequency, wherein the first sampling frequency is the maximum sampling frequency which can be reached by a system under the current operation;
and step S12, restoring the characteristic frequency of the load through the sampled signal.
Further, the control frequency of most of the switching power supplies in the market at present is about 30K, and the characteristic frequency representation of the load of such switching power supplies is the control frequency of the switching power supply, so that a sampling frequency of at least 60K is required for correctly identifying the special frequency of the switching power supply, however, in the software control of the present DSP, because of processing a plurality of complicated control logics and control algorithms, the interrupt frequency cannot be greatly increased, and therefore the characteristic frequency cannot be correctly identified.
On one hand, the detection of the characteristic frequency can affect the control interruption of the DSP because the sampling frequency needs to be greatly increased, the control interruption execution time of the DSP is insufficient, and the inversion cannot be operated, but at the same time, because the detection of the characteristic frequency needs to be carried out when the inversion is powered, in order to solve the conflict, the UPS inversion control exits from a closed-loop control mode and is switched into a special control mode when the frequency detection is carried out, only the output voltage is maintained to a load, other unnecessary functional modules such as a bypass phase lock, a communication module and a partial logic judgment module are stopped, and through the mode, the control interruption execution time is reduced, so that the sampling frequency can be greatly increased, and the load characteristic frequency during the inversion power supply can be detected. Therefore, in step S11, when the characteristic frequency is detected by the ups, the inverter control of the ups enters a special control mode. The special control mode is the least running code required by the chip and capable of maintaining the normal power supply of the load, namely, on the premise of sacrificing partial performance, the running time of the code is shortened as much as possible to improve the sampling frequency
On the other hand, under the condition that the cost is allowed, a chip special for sampling can be added, the sampling frequency of the chip is set to be more than 60K, the characteristic frequency of the signal is calculated according to the current signal obtained by sampling, and then the characteristic frequency is transmitted to the main control DSP chip in a communication mode. Therefore, in another embodiment of the present invention, in the step S11, the characteristic frequency detection is performed by a sampling chip.
Specifically, in an embodiment of the present invention, when the characteristic frequency of the load is greater than the sampling frequency of the UPS uninterruptible power supply, and the characteristic frequency of the load is a multiple of the sampling frequency of the UPS uninterruptible power supply, a runaway phenomenon may occur when the UPS detects a load current voltage signal, and the principle is approximately as shown in fig. 2. Once the sampling frequency is changed to the non-frequency-doubled relationship, the sampling position shown in fig. 4 can reflect the change of the current basically although the current waveform cannot be restored correctly, and the current signal can be added into the current loop as a feedback quantity after being filtered, and used as a control. Based on the above principle, after the characteristic frequency is obtained in step S1, if there is a multiple relationship between the sampling frequency of the ups and the characteristic frequency, the DSP sampling frequency of the ups is shifted as far as possible within the allowable range of the DSP sampling frequency of the ups to avoid the existence of the multiple relationship. If the sampling frequency of the UPS is larger than the characteristic frequency of the load and is in a multiple relation, the sampling frequency of the UPS can be adjusted to avoid the multiple relation and help the stability of the load.
The invention provides a method for adjusting and controlling the adaptability of an uninterruptible power supply load, which comprises the steps of firstly detecting the characteristic frequency of the load, and then utilizing the detected characteristic frequency to feed back and adjust the sampling frequency of the uninterruptible power supply, so that the sampling frequency of the uninterruptible power supply and the characteristic frequency of the load are in a non-frequency multiplication relation, thereby avoiding the phenomenon that the algorithm control strength is weakened or even out of control, meeting the diversity of the load, strengthening the adaptability of the uninterruptible power supply to the load and increasing the stability of the uninterruptible power supply.
Referring to fig. 5, based on the same inventive concept, the present invention further discloses an adaptive regulation control system for load of an uninterruptible power supply, including:
a characteristic frequency detecting module 510, configured to detect a characteristic frequency of the load when the characteristic frequency adjusting function is enabled; and
and an adjusting module 520, configured to adjust a sampling frequency of the uninterruptible power supply according to the characteristic frequency, so that the sampling frequency is in a non-multiple relationship with the characteristic frequency of the load.
Specifically, in one embodiment of the present invention, a characteristic frequency of the load is first determined. According to shannon's sampling law, if the signal is band-limited and the sampling frequency is higher than one time the highest frequency of the signal, the original continuous signal can be completely reconstructed from the sampled samples. Therefore, to accurately obtain the characteristic frequency of the load, it is necessary to sample the current signal of the load at a sampling frequency 2 times the characteristic frequency of the load, and restore the characteristic frequency of the load from the sampled signal. Therefore, the characteristic frequency detection module 510 includes:
the sampling unit is used for sampling a current signal of a load at a first sampling frequency, wherein the first sampling frequency is the maximum sampling frequency which can be reached by a system under the current operation;
and the calculating unit is used for calculating the characteristic frequency of the load through the sampled signals.
On one hand, the detection of the characteristic frequency can affect the control interruption of the DSP because the sampling frequency needs to be greatly increased, the control interruption execution time of the DSP is insufficient, and the inversion cannot be operated, but at the same time, because the detection of the characteristic frequency needs to be carried out when the inversion is powered, in order to solve the conflict, the UPS inversion control exits from a closed-loop control mode and is switched into a special control mode when the frequency detection is carried out, only the output voltage is maintained to a load, other unnecessary functional modules such as a bypass phase lock, a communication module and a partial logic judgment module are stopped, and through the mode, the control interruption execution time is reduced, so that the sampling frequency can be greatly increased, and the load characteristic frequency during the inversion power supply can be detected. In an embodiment of the present invention, when the sampling unit detects the characteristic frequency through the ups, the inverter control of the ups enters a special control mode.
On the other hand, under the condition that the cost is allowed, a chip special for sampling can be added, the sampling frequency of the chip is set to be more than 60K, the characteristic frequency of the signal is calculated according to the current signal obtained by sampling, and then the characteristic frequency is transmitted to the main control DSP chip in a communication mode. Therefore, in another embodiment of the present invention, the sampling unit performs the characteristic frequency detection through the sampling chip.
Specifically, in an embodiment of the present invention, after the characteristic frequency detecting module obtains the characteristic frequency, if the sampling frequency of the uninterruptible power supply has a multiple relationship with the characteristic frequency, the adjusting module adjusts and deviates the DSP sampling frequency of the uninterruptible power supply as much as possible within an allowable range of the DSP sampling frequency of the uninterruptible power supply, so as to avoid the existence of the multiple relationship. If the sampling frequency of the UPS is greater than the characteristic frequency of the load and is in a multiple relation, similarly, the adjusting module can also adjust the sampling frequency of the UPS, so that the multiple relation is avoided, and the stability of the load is facilitated.
The functions of the functional modules described in the embodiment of the apparatus of the present invention may be specifically implemented according to the method in the embodiment of the method, and the specific implementation process may refer to the description related to the embodiment of the method, which is not described herein again.
It should be noted that the above description of the various modules is divided into these modules for clarity of illustration. However, in actual implementation, the boundaries of the various modules may be fuzzy. For example, any or all of the functional modules herein may share various hardware and/or software elements. Also for example, any and/or all of the functional modules herein may be implemented in whole or in part by a common processor executing software instructions. Additionally, various software sub-modules executed by one or more processors may be shared among the various software modules. Accordingly, the scope of the present invention is not limited by the mandatory boundaries between the various hardware and/or software elements, unless explicitly claimed otherwise.
Fig. 6 is a schematic diagram of a hardware structure of an ups load adaptive regulation control system according to an embodiment of the present invention, and as shown in fig. 6, the apparatus includes one or more processors 61 and a memory 62, where one processor 61 is taken as an example in fig. 6. The processor 61 and the memory 62 may be connected by a bus or other means, such as the bus connection in fig. 6.
The Processor 61 may be a Central Processing Unit (CPU), the Processor 61 may also be other general-purpose processors, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, or any combination thereof. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 62 is a non-transitory computer readable storage medium, and can be used for storing non-transitory software programs, non-transitory computer executable programs, and modules, such as program instructions/modules corresponding to the method for adaptive regulation and control of ups load according to the embodiment of the present invention. The processor 61 executes various functional applications and data processing of the server by running non-transitory software programs, instructions and modules stored in the memory 62, that is, implementing the uninterruptible power supply load adaptation control method in the above embodiment.
The memory 62 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created from use of the ups load adaptive regulation control system, and the like. Further, the memory 62 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory 62 optionally includes memory remotely located from the processor 61, and these remote memories may be connected to the ups load adaptive regulation control system via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The one or more modules are stored in the memory 62 and, when executed by the one or more processors 61, perform the ups load adaptive regulation control method as described above.
The product can execute the method provided by the embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method. For details of the technique not described in detail in the embodiment, reference may be made to the related description in the embodiment shown in fig. 1.
The embodiment of the invention also provides a non-transient computer storage medium, wherein the computer storage medium stores computer executable instructions which can execute the uninterruptible power supply load adaptability regulation control method. The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM) > Random Access Memory (RAM) > Flash Memory > Hard Disk (Hard Disk Drive, abbreviated as HDD) or a Solid-State Drive (SSD), etc.; the storage medium may also comprise a combination of memories of the kind described above.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), a Random Access Memory (RAM), or the like.
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (10)
1. An adaptive regulation control method for load of an uninterruptible power supply is characterized by comprising the following steps:
step S1, detecting the characteristic frequency of the load under the condition that the characteristic frequency adjusting function is enabled; and
and step S2, adjusting the sampling frequency of the uninterrupted power supply according to the characteristic frequency to enable the sampling frequency to be in a non-multiple relation with the characteristic frequency of the load.
2. The method according to claim 1, wherein the step S1 includes:
step S11, sampling the current signal of the load at a first sampling frequency;
and step S12, calculating the characteristic frequency of the load through the sampled signals.
3. The method according to claim 2, wherein in step S11, when the characteristic frequency of the ups is detected, the ups inversion control enters a special control mode.
4. The adaptive regulation control method for load of uninterruptible power supply as claimed in claim 2, wherein in step S11, the characteristic frequency is detected by a dedicated sampling chip.
5. An uninterruptible power supply load adaptive regulation control system, comprising:
the characteristic frequency detection module is used for detecting the characteristic frequency of the load under the condition that the characteristic frequency adjusting function is enabled; and
and the adjusting module is used for adjusting the sampling frequency of the uninterruptible power supply according to the characteristic frequency so that the sampling frequency and the characteristic frequency of the load form a non-multiple relation.
6. The adaptive regulation control system for load of uninterruptible power supply as claimed in claim 5, wherein the characteristic frequency detection module comprises:
the sampling unit is used for sampling a current signal of a load at a first sampling frequency;
and the calculating unit is used for calculating the characteristic frequency of the load through the sampled signals.
7. The adaptive regulation control system for load of uninterruptible power supply according to claim 6, wherein when the sampling unit detects the characteristic frequency of the uninterruptible power supply, the inverter control of the uninterruptible power supply enters a special control mode.
8. The adaptive regulation control system of claim 6 wherein the sampling unit performs characteristic frequency detection via a dedicated sampling chip.
9. An uninterruptible power supply load adaptive regulation control system comprising at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the one processor to cause the at least one processor to perform the uninterruptible power supply load adaptation control method of any of claims 1 to 4.
10. A non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform the uninterruptible power supply load adaptation control method of any of claims 1 to 4.
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| CN103634006A (en) * | 2013-04-28 | 2014-03-12 | 中国科学院电子学研究所 | Rapid mixed sampling method for ultra wide band signal |
| CN106849331A (en) * | 2017-02-21 | 2017-06-13 | 易事特集团股份有限公司 | Uninterruptible power system and its power adjusting control circuit |
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| JPH01300480A (en) * | 1988-05-30 | 1989-12-04 | Matsushita Electric Ind Co Ltd | Optical information reproducing device |
| US5889398A (en) * | 1994-06-01 | 1999-03-30 | Siemens Aktiengesellschaft | Process for determining the harmonic oscillations of the fundamental component of an electrical signal |
| US7587131B1 (en) * | 2004-05-28 | 2009-09-08 | Magnum Semiconductor, Inc. | Audio clocking in video applications |
| CN101350518A (en) * | 2008-09-05 | 2009-01-21 | 国电南瑞科技股份有限公司 | Method for processing sampling value of digitalization protection test control apparatus |
| CN103634006A (en) * | 2013-04-28 | 2014-03-12 | 中国科学院电子学研究所 | Rapid mixed sampling method for ultra wide band signal |
| CN106849331A (en) * | 2017-02-21 | 2017-06-13 | 易事特集团股份有限公司 | Uninterruptible power system and its power adjusting control circuit |
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