CN116760311A - Inverter control method, device and medium - Google Patents
Inverter control method, device and medium Download PDFInfo
- Publication number
- CN116760311A CN116760311A CN202310974839.4A CN202310974839A CN116760311A CN 116760311 A CN116760311 A CN 116760311A CN 202310974839 A CN202310974839 A CN 202310974839A CN 116760311 A CN116760311 A CN 116760311A
- Authority
- CN
- China
- Prior art keywords
- inverter
- inverter system
- working
- bridge
- cascade
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 62
- 230000005540 biological transmission Effects 0.000 claims abstract description 19
- 230000010363 phase shift Effects 0.000 claims description 23
- 238000004590 computer program Methods 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 14
- 238000012545 processing Methods 0.000 description 6
- 230000006978 adaptation Effects 0.000 description 2
- 238000013473 artificial intelligence Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009877 rendering Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010801 machine learning Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000005055 memory storage Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
-
- 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
- H02M7/53—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 using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—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 using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—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 using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—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 using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
-
- 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
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
-
- 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
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The application relates to the field of electrical control, and discloses an inverter control method, an inverter control device and an inverter control medium, which are applied to an inverter system comprising a plurality of cascade H bridges, and comprise the following steps: acquiring an operating electric signal and an operating mode of an inverter system; the working modes comprise a step wave working mode and a carrier phase shifting working mode; judging whether the working state of the inverter system meets preset conditions or not according to the working electric signals; if the preset condition is met, acquiring target parameter information of a target cascade H bridge, and determining a control signal according to the target parameter information; the target cascade H bridge is a cascade H bridge which is currently accessed into an inverter system; and controlling the inverter system according to the control signal to switch the working mode. When the working state of the inverter system meets the preset condition, the control signal is determined according to the target parameter information of the cascade H bridge which is currently connected to the inverter system, so that the working mode of the inverter system is switched, and the power transmission efficiency of the system is improved.
Description
Technical Field
The present application relates to the field of electrical control, and in particular, to an inverter control method, apparatus, and medium.
Background
The H-bridge cascade multilevel converter adopts a method of connecting a plurality of power units in series to realize high-voltage output, and the output of the H-bridge cascade multilevel converter adopts a multilevel phase-shifting PWM control mode to realize lower output voltage harmonic waves, smaller voltage fluctuation, common-mode voltage and smaller torque pulsation. Each power unit is independent in physical structure, and if a high-voltage electric signal needs to be output, the number of the units is only increased. Because of the small technical difficulty of the implementation manner, the method is widely applied to various application scenes, such as: energy routers, etc.
FIG. 1 is a block diagram of an energy router provided by the present application; as shown in fig. 1, the energy router includes a plurality of modules, each of which is composed of a plurality of H-bridge driving circuits, and the operation of the energy router is controlled by controlling the on and off times of different switching tubes. The H bridge driving circuit is controlled by a carrier phase shift mode, the cascade H bridge is controlled by a carrier phase shift control method, the harmonic characteristic of the system is good, the power transmitted by each module is relatively balanced, but the switching frequency is relatively high, the switching loss is relatively high, and therefore the power transmission efficiency of the system is reduced.
It can be seen that how to provide a better inverter control method to improve the power transmission efficiency of the system is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The application aims to provide an inverter control method, an inverter control device and an inverter control medium so as to improve the power transmission efficiency of a system.
In order to solve the above technical problems, the present application provides an inverter control method applied to an inverter system including a plurality of cascaded H-bridges, the inverter control method including:
acquiring an operating electric signal and an operating mode of the inverter system; the working modes comprise a step wave working mode and a carrier wave phase shifting working mode;
judging whether the working state of the inverter system meets a preset condition according to the working electric signal;
if the preset condition is met, acquiring target parameter information of a target cascade H bridge, and determining a control signal according to the working mode and the target parameter information; the target cascade H bridge is a cascade H bridge which is currently accessed to the inverter system;
and controlling the inverter system according to the control signal so as to switch the working mode of the inverter system.
Preferably, the working electrical signal includes: an operating voltage signal and an operating current signal; correspondingly, the judging whether the working state of the inverter system meets the preset condition according to the working electric signal comprises the following steps:
determining transmission efficiency and switching loss of the inverter system according to the operating current signal and the operating voltage signal;
and if the transmission efficiency is lower than a transmission efficiency threshold value and/or the switching loss is greater than the switching loss threshold value, determining that the working state of the inverter system meets the preset condition.
Preferably, the obtaining the target parameter information of the target cascaded H-bridge includes:
acquiring serial number information of a cascade H bridge currently connected to the inverter system;
and determining the target parameter information according to the number information and the parameter record file.
Preferably, said determining a control signal according to said operation mode and said target parameter information comprises:
determining a post-switching working mode of the inverter system according to the working mode, thereby determining a target type of the control signal, wherein the target type of the control signal comprises a step wave and a triangular wave;
and determining the control signal corresponding to the target type according to the target parameter information.
Preferably, the determining the control signal corresponding to the target type according to the target parameter information includes:
and acquiring the conduction voltage of the target cascade H bridge, so as to determine the amplitude information and the frequency information of the control signal.
Preferably, after the step of controlling the inverter system according to the control signal to switch the working mode of the inverter system, the method further includes:
judging whether the fluctuation of the working voltage signal is larger than a fluctuation threshold value in the switching process of the working mode;
and if the fluctuation threshold value is larger than the fluctuation threshold value, sending alarm information to a manager.
Preferably, the duration of the carrier phase shift mode is an integer multiple of the triangular wave period.
In order to solve the above technical problem, the present application also provides an inverter control device applied to an inverter system including a plurality of cascaded H-bridges, the inverter control device including:
the acquisition module is used for acquiring the working electric signals and the working modes of the inverter system; the working modes comprise a step wave working mode and a carrier wave phase shifting working mode;
the judging module is used for judging whether the working state of the inverter system meets the preset condition according to the working electric signal;
the determining module is used for acquiring target parameter information of a target cascade H bridge if the preset condition is met, and determining a control signal according to the working mode and the target parameter information; the target cascade H bridge is a cascade H bridge which is currently accessed to the inverter system;
and the control module is used for controlling the inverter system according to the control signal so as to switch the working mode of the inverter system.
In order to solve the technical problem, the application also provides an inverter control device, which comprises a memory for storing a computer program;
and the processor is used for realizing the steps of the inverter control method when executing the computer program.
In order to solve the above technical problem, the present application further provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps of the inverter control method.
The application provides an inverter control method, which is applied to an inverter system comprising a plurality of cascaded H bridges, and comprises the following steps: acquiring an operating electric signal and an operating mode of an inverter system; the working modes comprise a step wave working mode and a carrier phase shifting working mode; judging whether the working state of the inverter system meets preset conditions or not according to the working electric signals; if the preset condition is met, acquiring target parameter information of a target cascade H bridge, and determining a control signal according to the target parameter information; the target cascade H bridge is a cascade H bridge which is currently accessed into the inverter system; and controlling the inverter system according to the control signal to switch the working mode of the inverter system. Therefore, when the working state of the inverter system meets the preset condition, the technical scheme provided by the application determines the control signal according to the target parameter information of the cascade H bridge which is currently connected into the inverter system, so that the working mode of the inverter system is switched, and the power transmission efficiency of the system is improved.
In addition, the application also provides an inverter control device and a medium, which correspond to the method and have the same effects.
Drawings
For a clearer description of embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described, it being apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
FIG. 1 is a block diagram of an energy router provided by the present application;
fig. 2 is a flowchart of an inverter control method according to an embodiment of the present application;
fig. 3 is a schematic diagram of carrier phase shift modulation;
FIG. 4 is a schematic diagram of a ladder wave modulation;
FIG. 5 is a schematic diagram of a step-wave switching to carrier phase shifting;
FIG. 6 is a schematic diagram of carrier phase shift switching to a step wave;
fig. 7 is a block diagram of an inverter control device according to an embodiment of the present application;
fig. 8 is a block diagram of another inverter control device according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without making any inventive effort are within the scope of the present application.
The application provides an inverter control method, an inverter control device and an inverter control medium, so as to improve the power transmission efficiency of a system.
The technical scheme provided by the application is applied to a multi-cascade H-bridge inverter system, for example: and the energy router is used for controlling the on and off of each switching tube in the H bridge through the generated control signal, thereby ensuring the normal operation of the inverter system. In a specific implementation, the number of Cascaded H-Bridge (CHB) modules connected to the power grid changes with the change of the voltage at the power grid side. The application obtains the working electric signal and the working mode of the inverter system; the working modes comprise a step wave working mode and a carrier phase shifting working mode; judging whether the working state of the inverter system meets preset conditions or not according to the working electric signals; if the preset condition is met, acquiring target parameter information of a target cascade H bridge, and determining a control signal according to the target parameter information; the target cascade H bridge is a cascade H bridge which is currently accessed into the inverter system; and controlling the inverter system according to the control signal to switch the working mode of the inverter system. Therefore, when the working state of the inverter system meets the preset condition, the technical scheme provided by the application determines the control signal according to the target parameter information of the cascade H bridge which is currently connected into the inverter system, so that the working mode of the inverter system is switched, and the power transmission efficiency of the system is improved.
In order to better understand the aspects of the present application, the present application will be described in further detail with reference to the accompanying drawings and detailed description.
Fig. 2 is a flowchart of an inverter control method according to an embodiment of the present application, where the inverter control method is applied to an inverter system including a plurality of cascaded H-bridges, as shown in fig. 2, and the inverter control method includes:
s10: acquiring an operating electric signal and an operating mode of an inverter system; the working modes comprise a step wave working mode and a carrier wave phase shifting working mode.
In specific implementation, the step wave working mode refers to controlling the driving work of each H bridge in the inverter system by a control signal in the form of a step wave, and the carrier phase-shifting working mode refers to determining a triangular wave signal capable of driving the driving work of the H bridge by a carrier phase-shifting algorithm so as to control the inverter system to work. The control methods used are similar, but the frequency and amplitude of the control signals input by the two control methods are different.
Fig. 3 is a schematic diagram of carrier phase shift modulation, as shown in fig. 3, carrier phase shift is an SPWM method suitable for a cascaded multilevel inverter, and the basic principle of the method is that for a single-phase cascaded multilevel inverter formed by n H-bridge units, each H-bridge unit adopts an SPWM modulation method with low switching frequency, sinusoidal modulation waves of each unit are identical, n groups of triangular carriers are used for modulation respectively, each triangular carrier has identical frequency and amplitude, but phases are sequentially different by a fixed angle (the phase difference angle is usually 2 pi/n or pi/n), so that SPWM pulses output by each H-bridge unit are also staggered by a certain angle, the equivalent switching frequency is greatly increased, and after superposition, the waveform finally output by the inverter is shown as a voltage curve U in fig. 3. It should be noted that, the carrier phase shift control method is used to control the cascaded H-bridge, which has better harmonic characteristics, and the power transmitted by each module is relatively balanced, but the switching frequency is relatively high.
Fig. 4 is a schematic diagram of a ladder modulation scheme, as shown in fig. 4, where the ladder wave is an SPWM method suitable for cascading multiple level inverters, and the basic principle is that, in the low frequency part, each low frequency H-bridge unit is turned on at a fixed voltage level, and a corresponding low frequency step is generated. And calculating the starting time of the high-frequency module according to the voltage difference between the modulated wave and the low-frequency step wave, and compensating the difference between the modulated wave and the low-frequency step wave. In order to reduce the time difference of the low frequency module, a strategy of 'first on first off' is generally adopted to control the low frequency step wave. The cascade H bridge is controlled by using a step wave control method, so that the switching frequency is low, the switching loss is small, and the overall efficiency is high.
S11: judging whether the working state of the inverter system meets preset conditions or not according to the working electric signals;
s12: if the preset condition is met, acquiring target parameter information of a target cascade H bridge, and determining a control signal according to the working mode and the target parameter information; the target cascade H bridge is a cascade H bridge which is currently accessed into the inverter system;
s13: and controlling the inverter system according to the control signal to switch the working mode of the inverter system.
In specific implementation, through detecting the working voltage signal and the working current signal in the inverter module in real time, when the working state meets the preset condition, the control mode is directly switched to the control mode of carrier phase shift by the step wave control mode, the control mode of carrier phase shift is used for power peaks, and when the power peaks pass, the control mode is switched to the step wave control algorithm by the carrier phase shift control algorithm, so that the power transmission efficiency is improved, and the line switching loss is reduced.
It should be noted that, before and after the switching of the working mode of the inverter, because there are multiple H-bridge driving circuits in the circuit, the situation that the modules of the access system are inconsistent before and after the switching may occur, so that a larger voltage difference exists between the bus capacitor voltage and the total voltage at the rear side of the cascaded H-bridge, and a larger current signal and a larger fluctuation of the voltage signal may be generated at the switching moment, resulting in unstable system.
The application obtains the working electric signal and the working mode of the inverter system; the working modes comprise a step wave working mode and a carrier phase shifting working mode; judging whether the working state of the inverter system meets preset conditions or not according to the working electric signals; if the preset condition is met, acquiring target parameter information of a target cascade H bridge, and determining a control signal according to the target parameter information; the target cascade H bridge is a cascade H bridge which is currently accessed into the inverter system; and controlling the inverter system according to the control signal to switch the working mode of the inverter system. Therefore, when the working state of the inverter system meets the preset condition, the technical scheme provided by the application determines the control signal according to the target parameter information of the cascade H bridge which is currently connected into the inverter system, so that the working mode of the inverter system is switched, and the power transmission efficiency of the system is improved.
In a specific implementation, the acquired operating electrical signals of the inverter system include: an operating voltage signal and an operating current signal; correspondingly, judging whether the working state of the inverter system meets the preset condition according to the working electric signal comprises the following steps: determining the transmission efficiency and switching loss of the inverter system according to the working current signal and the working voltage signal; and if the transmission efficiency is lower than the transmission efficiency threshold value and/or the switching loss is greater than the switching loss threshold value, determining that the working state of the inverter system meets the preset condition.
In addition, the switching loss power of the inverter can be calculated according to the working electric signal, and if the switching loss of the inverter under the control of the step wave is larger than the switching loss under the control of the carrier phase shift and is currently in the step wave working mode, the inverter is switched to the carrier phase shift working mode. When the switching loss of the inverter under the control of the step wave is smaller than the switching loss under the control of the carrier phase shift and is currently in the carrier phase shift working mode, the inverter is switched to the step wave working mode.
As a preferred embodiment, acquiring the target parameter information of the target cascaded H-bridge includes: acquiring serial number information of cascade H bridges currently connected into an inverter system to ensure that the cascade H bridges conducted in the inverter system before and after switching are identical; and determining target parameter information according to the number information and the parameter record file, so as to determine corresponding control signals according to the target parameter information, and control the inverter system conveniently.
Fig. 5 is a schematic diagram showing switching of a step wave into carrier phase shift, as shown in fig. 5, when switching, a triangular wave is generated according to the step position of the step wave where each module is located, and when the step modulation wave is located between 4 and 5 steps, 5 is taken as a reference point (the first step above the intersection point) for 0.002s: step wave switching to carrier phase shift, 0.008s: the carrier wave phase shift is switched to the step wave, the step difference 900 of two adjacent step waves is generated by the step wave generated by the step difference 4 x 900 of two adjacent triangular waves, so that the 2n module is identical to the triangular wave starting point of the 2n+1 module, and the directions are up and down. When the carrier wave phase shift switch returns to the step wave, the triangular wave just returns to the original phase, (the continuous time of carrier wave phase shift or the frequency of the triangular wave) and the modules 1-4 are opened (at the moment before 0.002 s) under the control of the step wave before switching, and the modules 1-4 are still opened (at the moment after 0.002 s) after the carrier wave phase shift. The total carrier phase-shifting duration is an integer multiple of the period of the triangular wave, so that when the carrier phase-shifting phase is switched back to the step wave (0.008 s), the triangular wave just returns to the original position, and the system can work normally before and after the phase shifting. Fig. 6 is a schematic diagram of carrier phase shift switching to a step wave, which is similar to the process described above.
It will be appreciated that determining the control signal based on the operating mode and the target parameter information includes: determining a post-switching working mode of the inverter system according to the working mode, thereby determining a target type of the control signal; and determining a control signal corresponding to the target type according to the target parameter information. In a specific implementation, a plurality of working modules exist in the inverter system, and a plurality of cascaded H-bridge driving circuits exist in each module.
Correspondingly, the frequency and the amplitude of the control signal are obtained from the parameter information of the conducted H-bridge driving circuit, and specifically, determining the control signal corresponding to the target type according to the target parameter information comprises: and acquiring the conducting voltage of the cascade H bridge to be connected into the inverter system, thereby determining the amplitude information and the frequency information of the control signal. So as to control the cascade H bridge according to the control signal, thereby realizing seamless switching of the ladder wave and the phase-shifting carrier wave. It should be noted that the cascade H-bridge to be connected to the inverter system provided in the present application is the aforementioned target cascade H-bridge, so as to ensure that after the step wave and the carrier wave are switched, the cascade H-bridge connected to the inverter system is consistent, so as to prevent the inverter voltage from suddenly changing.
In a specific implementation, in order to ensure the normal operation of the control system, the switching result of the inverter needs to be monitored, so that measures can be taken in time when an abnormality occurs. On the basis of the above embodiment, after the step of controlling the inverter system according to the control signal to switch the operation mode of the inverter system, the method further includes: judging whether the fluctuation of the working voltage signal is larger than a fluctuation threshold value in the switching process of the working mode; and if the fluctuation threshold value is larger than the fluctuation threshold value, sending alarm information to the manager.
Further, the alarm information should include switching time, voltage amplitude and current amplitude before and after switching, inverter modules in the system before and after switching, and the like. It will be appreciated that, to further improve the stability of the system, all successful switching operations may also be recorded in the operation log, so as to provide data support for system maintenance later.
In the above embodiments, the inverter control method is described in detail, and the present application also provides corresponding embodiments of the inverter control device. It should be noted that the present application describes an embodiment of the device portion from two angles, one based on the angle of the functional module and the other based on the angle of the hardware.
Fig. 7 is a block diagram of an inverter control device according to an embodiment of the present application, which is applied to an inverter system including a plurality of cascaded H-bridges, as shown in fig. 7, and includes:
an acquisition module 10 for acquiring an operation electric signal and an operation mode of the inverter system; the working modes comprise a step wave working mode and a carrier phase shifting working mode;
a judging module 11, configured to judge whether the working state of the inverter system meets a preset condition according to the working electric signal;
the determining module 12 is configured to obtain target parameter information of the target cascaded H-bridge if a preset condition is satisfied, and determine a control signal according to the working mode and the target parameter information; the target cascade H bridge is a cascade H bridge which is currently accessed into the inverter system;
the control module 13 is used for controlling the inverter system according to the control signal so as to switch the working mode of the inverter system.
Since the embodiments of the apparatus portion and the embodiments of the method portion correspond to each other, the embodiments of the apparatus portion are referred to the description of the embodiments of the method portion, and are not repeated herein.
The inverter control device provided by the application comprises: acquiring an operation electric signal and an operation mode of an inverter system; the working modes comprise a step wave working mode and a carrier phase shifting working mode; judging whether the working state of the inverter system meets preset conditions or not according to the working electric signals; if the preset condition is met, acquiring target parameter information of a target cascade H bridge, and determining a control signal according to the target parameter information; the target cascade H bridge is a cascade H bridge which is currently accessed into the inverter system; and controlling the inverter system according to the control signal to switch the working mode of the inverter system. Therefore, when the working state of the inverter system meets the preset condition, the technical scheme provided by the application determines the control signal according to the target parameter information of the cascade H bridge which is currently connected into the inverter system, so that the working mode of the inverter system is switched, and the power transmission efficiency of the system is improved.
Fig. 8 is a block diagram of another inverter control according to an embodiment of the present application, and as shown in fig. 8, the inverter control device includes: a memory 20 for storing a computer program;
a processor 21 for implementing the steps of the inverter control method according to the above embodiment when executing a computer program.
The inverter control device provided in this embodiment may include, but is not limited to, a smart phone, a tablet computer, a notebook computer, a desktop computer, or the like.
Processor 21 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 21 may be implemented in hardware in at least one of a digital signal processor (Digital Signal Processor, DSP), a Field programmable gate array (Field-Programmable Gate Array, FPGA), a programmable logic array (Programmable Logic Array, PLA). The processor 21 may also comprise a main processor, which is a processor for processing data in an awake state, also called central processor (Central Processing Unit, CPU), and a coprocessor; a coprocessor is a low-power processor for processing data in a standby state. In some embodiments, the processor 21 may be integrated with an image processor (Graphics Processing Unit, GPU) for taking care of rendering and rendering of the content that the display screen is required to display. In some embodiments, the processor 21 may also include an artificial intelligence (Artificial Intelligence, AI) processor for processing computing operations related to machine learning.
Memory 20 may include one or more computer-readable storage media, which may be non-transitory. Memory 20 may also include high-speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In this embodiment, the memory 20 is at least used for storing a computer program 201, which, when loaded and executed by the processor 21, is capable of implementing the relevant steps of the inverter control method disclosed in any of the foregoing embodiments. In addition, the resources stored in the memory 20 may further include an operating system 202, data 203, and the like, where the storage manner may be transient storage or permanent storage. The operating system 202 may include Windows, unix, linux, among others. The data 203 may include, but is not limited to, operating electrical signals, control signals, and the like.
In some embodiments, the inverter control device may further include a display 22, an input/output interface 23, a communication interface 24, a power source 25, and a communication bus 26.
It will be appreciated by those skilled in the art that the configuration shown in fig. 8 does not constitute a limitation of the inverter control device, and may include more or less components than those illustrated.
The inverter control device provided by the embodiment of the application comprises a memory and a processor, wherein the processor can realize the following method when executing a program stored in the memory:
acquiring an operating electric signal and an operating mode of an inverter system; the working modes comprise a step wave working mode and a carrier phase shifting working mode;
judging whether the working state of the inverter system meets preset conditions or not according to the working electric signals;
if the preset condition is met, acquiring target parameter information of a target cascade H bridge, and determining a control signal according to the working mode and the target parameter information; the target cascade H bridge is a cascade H bridge which is currently accessed into the inverter system;
and controlling the inverter system according to the control signal to switch the working mode of the inverter system.
Finally, the application also provides a corresponding embodiment of the computer readable storage medium. The computer-readable storage medium has stored thereon a computer program which, when executed by a processor, performs the steps as described in the method embodiments above.
It will be appreciated that the methods of the above embodiments, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored on a computer readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium for performing all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The inverter control method, the inverter control device and the inverter control medium provided by the application are described in detail above. In the description, each embodiment is described in a progressive manner, and each embodiment is mainly described by the differences from other embodiments, so that the same similar parts among the embodiments are mutually referred. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the application can be made without departing from the principles of the application and these modifications and adaptations are intended to be within the scope of the application as defined in the following claims.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. An inverter control method applied to an inverter system including a plurality of cascaded H-bridges, the inverter control method comprising:
acquiring an operating electric signal and an operating mode of an inverter system; the working modes comprise a step wave working mode and a carrier wave phase shifting working mode;
judging whether the working state of the inverter system meets a preset condition according to the working electric signal;
if the preset condition is met, acquiring target parameter information of a target cascade H bridge, and determining a control signal according to the working mode and the target parameter information; the target cascade H bridge is a cascade H bridge which is currently accessed to the inverter system;
and controlling the inverter system according to the control signal so as to switch the working mode of the inverter system.
2. The inverter control method according to claim 1, wherein the operating electrical signal includes: an operating voltage signal and an operating current signal; correspondingly, the judging whether the working state of the inverter system meets the preset condition according to the working electric signal comprises the following steps:
determining transmission efficiency and switching loss of the inverter system according to the operating current signal and the operating voltage signal;
and if the transmission efficiency is lower than a transmission efficiency threshold value and/or the switching loss is greater than the switching loss threshold value, determining that the working state of the inverter system meets the preset condition.
3. The inverter control method according to claim 1, wherein the acquiring the target parameter information of the target cascade H-bridge includes:
acquiring serial number information of a cascade H bridge currently connected to the inverter system;
and determining the target parameter information according to the number information and the parameter record file.
4. The inverter control method according to any one of claims 1 to 3, characterized in that the determining a control signal according to the operation mode and the target parameter information includes:
determining a post-switching working mode of the inverter system according to the working mode, thereby determining a target type of the control signal, wherein the target type of the control signal comprises a step wave and a triangular wave;
and determining the control signal corresponding to the target type according to the target parameter information.
5. The inverter control method according to claim 4, wherein the determining the control signal corresponding to the target type according to the target parameter information includes:
and acquiring the conduction voltage of the target cascade H bridge, so as to determine the amplitude information and the frequency information of the control signal.
6. The inverter control method according to claim 1, wherein after the step of controlling the inverter system according to the control signal to switch the operation mode of the inverter system, further comprising:
judging whether the fluctuation of the working voltage signal is larger than a fluctuation threshold value in the switching process of the working mode;
and if the fluctuation threshold value is larger than the fluctuation threshold value, sending alarm information to a manager.
7. The inverter control method according to claim 1, wherein the carrier phase shift pattern has a duration that is an integer multiple of a triangular wave period.
8. An inverter control device, characterized by being applied to an inverter system including a plurality of cascaded H-bridges, comprising:
the acquisition module is used for acquiring the working electric signals and the working modes of the inverter system; the working modes comprise a step wave working mode and a carrier wave phase shifting working mode;
the judging module is used for judging whether the working state of the inverter system meets the preset condition according to the working electric signal;
the determining module is used for acquiring target parameter information of a target cascade H bridge if the preset condition is met, and determining a control signal according to the working mode and the target parameter information; the target cascade H bridge is a cascade H bridge which is currently accessed to the inverter system;
and the control module is used for controlling the inverter system according to the control signal so as to switch the working mode of the inverter system.
9. An inverter control device comprising a memory for storing a computer program;
a processor for implementing the steps of the inverter control method according to any one of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the inverter control method according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310974839.4A CN116760311A (en) | 2023-08-03 | 2023-08-03 | Inverter control method, device and medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310974839.4A CN116760311A (en) | 2023-08-03 | 2023-08-03 | Inverter control method, device and medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116760311A true CN116760311A (en) | 2023-09-15 |
Family
ID=87951608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310974839.4A Pending CN116760311A (en) | 2023-08-03 | 2023-08-03 | Inverter control method, device and medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116760311A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117394698A (en) * | 2023-12-13 | 2024-01-12 | 深圳市芯茂微电子有限公司 | H-bridge power supply circuit control method, device and medium |
-
2023
- 2023-08-03 CN CN202310974839.4A patent/CN116760311A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117394698A (en) * | 2023-12-13 | 2024-01-12 | 深圳市芯茂微电子有限公司 | H-bridge power supply circuit control method, device and medium |
| CN117394698B (en) * | 2023-12-13 | 2024-03-26 | 深圳市芯茂微电子有限公司 | H-bridge power supply circuit control method, device and medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN116760311A (en) | Inverter control method, device and medium | |
| CN114447889B (en) | Protection method, device and medium for grid-connected inverter | |
| Langer et al. | Neural‐network‐based space‐vector pulse‐width modulation for capacitor voltage balancing of three‐phase three‐level improved power quality converter | |
| CN108258961A (en) | Motor control method and control device, permanent magnet synchronous motor and storage medium | |
| CN103746582B (en) | Parallel connection type multi-electrical level inverter control method and parallel connection type multi-electrical level inverter | |
| JP4911241B1 (en) | Power converter | |
| CN108448581A (en) | A kind of method of parallel-current source inventer grid-connected current particular harmonic control | |
| CN104836209A (en) | Digital power supply protection circuit and apparatus | |
| CN105207511B (en) | A kind of control method of converter, device and system | |
| CN114070097A (en) | Drive control method of alternating current conversion circuit and related device | |
| US10666159B2 (en) | Single-phase converter control method and apparatus | |
| CN112952889B (en) | Optimizing method and device for virtual power grid self-adaptive control strategy and terminal equipment | |
| CN112803823A (en) | Pulse width modulation method, inverter and controller | |
| CN113179037B (en) | Switching frequency modulation method and device and storage medium | |
| CN112994503B (en) | SPWM (sinusoidal pulse Width modulation) method and terminal equipment of single-phase full-bridge inverter | |
| CN113241989B (en) | Method, device and processor for realizing optimal efficiency point control for shaded pole motor and computer readable storage medium thereof | |
| CN114400916A (en) | Inverter modulation method, inverter modulation device, storage medium, and electronic apparatus | |
| CN111711346B (en) | Drive signal updating method applied to switching tube control circuit and related device | |
| CN117856641A (en) | Modulation method and device of ANPC type three-level inverter | |
| CN116545079B (en) | Modulation method, modulation device and storage medium of cascade energy storage system | |
| CN117394354B (en) | Current equalizing method and device of inverter, inversion system and storage medium | |
| CN113965100B (en) | Decoding method, control method and device for three-level pulse modulation control | |
| CN111245278A (en) | Pulse modulation method, pulse modulation apparatus, and storage medium | |
| CN113904427B (en) | Power supply mode switching method and device | |
| US10910955B2 (en) | Single carrier based multilevel modulation method and device, and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |