CN109120176A - Two frequency multiplication reconstructing method of electric current, device and electronic equipment - Google Patents
Two frequency multiplication reconstructing method of electric current, device and electronic equipment Download PDFInfo
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- CN109120176A CN109120176A CN201811297891.6A CN201811297891A CN109120176A CN 109120176 A CN109120176 A CN 109120176A CN 201811297891 A CN201811297891 A CN 201811297891A CN 109120176 A CN109120176 A CN 109120176A
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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
- H02M7/483—Converters with outputs that each can have more than two voltages levels
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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
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0009—Devices or circuits for detecting current in a converter
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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
- H02M1/0048—Circuits or arrangements for reducing losses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The present invention provides a kind of two frequency multiplication reconstructing method of electric current, device and electronic equipments, are related to electric current reconstructing technical field, and this method is applied to MMC inverter, comprising: obtains the first amplitude and the first phase angle of two frequency multiplication of electric current in MMC inverter；The second amplitude and the second phase angle that reconstruct two frequency multiplication of electric current is determined according to first amplitude and the first phase angle, obtain the expression formula of reconstruct two frequency multiplication of electric current；According to the expression formula of reconstruct two frequency multiplication of electric current, pass through two frequency multiplication of electric current of electric current reconstructing Controller Reconfiguration MMC inverter.The present invention can be effectively reduced voltage fluctuation of capacitor and prevent the increase of loss.
Description
Technical field
The present invention relates to electric current reconstructing technical fields, more particularly, to a kind of two frequency multiplication reconstructing method of electric current, device and electricity
Sub- equipment.
Background technique
Modularization multi-level converter (Modular Multilevel Converter, MMC), which has, is easily achieved module
Change, is low convenient for dilatation and redundant configuration, switching frequency and be easy to the advantages that constructing DC grid, receiving the wide of domestic and foreign scholars
General concern, and pushing to be engineered.But MMC inverter is bulky, takes up a large area, the converter valve weight of MMC inverter
The reduction of amount and volume can reduce use, the save the cost of components, therefore can bring great economic benefit, to realization
The lightness of MMC converter valve has very big engineering significance.And it can reduce by reducing the fluctuation of MMC submodule capacitor voltage
The capacitance of submodule capacitor realizes the lightness of MMC inverter.
The methods for reducing submodule capacitor voltage fluctuation most of at present are that two frequencys multiplication electricity is injected into the bridge arm of inverter
Stream, but traditional two frequency multiplication current methods of injection will increase bridge arm current while reducing the fluctuation of MMC submodule capacitor voltage
Virtual value, thus bring loss increase the problem of.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of two frequency multiplication reconstructing method of electric current, device and electronic equipment, energy
Voltage fluctuation of capacitor is enough effectively reduced and prevents the increase of loss.
To achieve the goals above, technical solution used in the embodiment of the present invention is as follows:
In a first aspect, this method is applied to the MMC change of current the embodiment of the invention provides a kind of two frequency multiplication reconstructing method of electric current
Device, comprising: obtain the first amplitude and the first phase angle of two frequency multiplication of electric current in MMC inverter；According to first amplitude and the first phase angle
The second amplitude and the second phase angle for determining reconstruct two frequency multiplication of electric current obtain the expression formula of reconstruct two frequency multiplication of electric current；Wherein, the second width
Value is identical as the size of first amplitude, and the second phase angle differs 180 degree with the first phase angle；According to the expression of reconstruct two frequency multiplication of electric current
Formula passes through two frequency multiplication of electric current of electric current reconstructing Controller Reconfiguration MMC inverter.
With reference to first aspect, the embodiment of the invention provides the first possible embodiments of first aspect, wherein obtains
The step of taking the first amplitude and the first phase angle of two frequency multiplication of electric current in MMC inverter, comprising: obtain the target in MMC inverter
Parameter；Wherein, target component includes in power-factor angle, modulation ratio, current dc component, angular frequency, reactance value and capacitance
It is a variety of；According to target component, calculate separately to obtain electric current in MMC inverter by amplitude calculation formula and phase calculation formula
The first amplitude of two frequencys multiplication and the first phase angle.
With reference to first aspect, the embodiment of the invention provides second of possible embodiments of first aspect, wherein logical
Overcurrent reconfigurable controller reconstructs the step of two frequency multiplication of electric current of MMC inverter, comprising: according to the second amplitude and the second phase angle,
Reconstruct two frequency multiplication of electric current is transformed into dq axis by abc three-phase, obtains the d axis component and q axis component of reconstruct two frequency multiplication of electric current；By d
Axis component and q axis component are input to electric current reconstructing controller.
The possible embodiment of second with reference to first aspect, the embodiment of the invention provides the third of first aspect
Possible embodiment, wherein the step of reconstruct two frequency multiplication of electric current is transformed into dq axis by abc three-phase, comprising: according to Clark
Corresponding two frequency multiplication of reconstruct electric current of abc tri- is transformed to α β axis, obtains two frequency multiplication of reconstruct electric current of α β axis by transformation for mula；Root
According to Park transformation for mula, two frequency multiplication of reconstruct electric current of α β axis is transformed into dq axis.
Second aspect, the embodiment of the invention also provides a kind of two frequencys multiplication of electric current to reconstruct device, which includes: acquisition mould
Block, for obtaining the first amplitude and the first phase angle of two frequency multiplication of electric current in MMC inverter；Determining module, for according to the first width
Value and the first phase angle determine the second amplitude and the second phase angle of reconstruct two frequency multiplication of electric current, obtain the expression of reconstruct two frequency multiplication of electric current
Formula；Wherein, the second amplitude is identical as the size of first amplitude, and the second phase angle differs 180 degree with the first phase angle；Reconstructed module is used
In the expression formula according to reconstruct two frequency multiplication of electric current, pass through two frequency multiplication of electric current of electric current reconstructing Controller Reconfiguration MMC inverter.
The third aspect, the embodiment of the invention provides a kind of electronic equipment, comprising: processor and memory；On memory
It is stored with computer program, computer program executes the third of first aspect to first aspect such as when being run by processor can
The method of any one of the embodiment of energy.
Fourth aspect, the embodiment of the invention provides a kind of computer readable storage medium, computer readable storage mediums
On be stored with computer program, executed when computer program is run by processor above-mentioned first aspect to first aspect the third
The step of method of any one of possible embodiment.
The embodiment of the invention provides a kind of two frequency multiplication reconstructing method of electric current, device and electronic equipments, are changed by obtaining MMC
The first amplitude and the first phase angle of two frequency multiplication of electric current in device are flowed, and two times of electric current of reconstruct is determined according to first amplitude and the first phase angle
The second amplitude and the second phase angle of frequency obtain the expression formula of reconstruct two frequency multiplication of electric current, thus according to the table of reconstruct two frequency multiplication of electric current
Up to formula, pass through two frequency multiplication of electric current of electric current reconstructing Controller Reconfiguration MMC inverter.Due to reconstructing the second amplitude of two frequency multiplication of electric current
Identical as the size of first amplitude, the second phase angle differs 180 degree with the first phase angle, with the average value of this obtained electric current and effectively
Value and the average value and virtual value that reconstruct preceding electric current are corresponding identical, and electric current not will increase, therefore reduce voltage fluctuation of capacitor
The increase of loss can be prevented simultaneously.
Other feature and advantage of the disclosure will illustrate in the following description, alternatively, Partial Feature and advantage can be with
Deduce from specification or unambiguously determine, or by implement the disclosure above-mentioned technology it can be learnt that.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 shows a kind of flow chart of two frequency multiplication reconstructing method of electric current provided by the embodiment of the present invention；
Fig. 2 shows a kind of signals of the reconstruct amount computing module of two harmonic of electric current provided by the embodiment of the present invention
Figure；
Fig. 3 shows the flow chart of two frequency multiplication reconstructing method of another kind electric current provided by the embodiment of the present invention；
Fig. 4 shows a kind of schematic diagram of the reconstructed module of two harmonic of electric current provided by the embodiment of the present invention；
Fig. 5 shows the dq solution after a kind of reconstructed module of two harmonic of extra current provided by the embodiment of the present invention
The schematic diagram of coupling controller；
Fig. 6 shows a kind of structural block diagram of two frequency multiplication of electric current reconstruct device provided by the embodiment of the present invention；
Fig. 7 shows the structural schematic diagram of a kind of electronic equipment provided by the embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Technical solution be clearly and completely described, it is clear that described embodiments are some of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall within the protection scope of the present invention.
While reducing voltage fluctuation of capacitor loss can increase by two frequency multiplication reconstructing method of electric current traditional at present, this hair
Bright embodiment provides a kind of two frequency multiplication reconstructing method of electric current, device and electronic equipment, carries out below to the embodiment of the present invention detailed
It is thin to introduce.
In view of MMC inverter reduces the capacitance of capacitor by reducing submodule capacitor voltage fluctuation, changed to reduce
The volume of device is flowed, and the prior art can be such that loss increases when reducing voltage fluctuation of capacitor, present embodiments provide a kind of electric current
Two frequency multiplication reconstructing methods can be effectively reduced voltage fluctuation of capacitor and prevent the increase of loss, a kind of electric current shown in Figure 1
The flow chart of two frequency multiplication reconstructing methods, this method are applied to MMC inverter, method includes the following steps:
Step S102 obtains the first amplitude and the first phase angle of two frequency multiplication of electric current in MMC inverter.
It include two harmonics in the bridge arm current of MMC inverter, the amplitude and phase angle of two frequency multiplication of electric current can be according to width
Value calculation formula and phase calculation formula obtain.
Step S104 determines the second amplitude and the second phase of reconstruct two frequency multiplication of electric current according to first amplitude and the first phase angle
Angle obtains the expression formula of reconstruct two frequency multiplication of electric current；Wherein, the second amplitude is identical as the size of first amplitude, the second phase angle and
One phase angle differs 180 degree.
Using the first amplitude for two frequency multiplication of electric current being calculated as the second amplitude of reconstruct two frequency multiplication of electric current, will calculate
To two frequency multiplication of electric current the first phase angle increased or decrease 180 degree as reconstruct two frequency multiplication of electric current the second phase angle, obtained with this
Bridge arm current virtual value and average value it is identical as the virtual value of the bridge arm current before reconstruct and average value.
Step S106 passes through electric current reconstructing Controller Reconfiguration MMC inverter according to the expression formula of reconstruct two frequency multiplication of electric current
Two frequency multiplication of electric current.
Specifically, a kind of schematic diagram of the reconstruct amount computing module of two harmonic of electric current as shown in Figure 2, by reconstruct electricity
It flows two frequencys multiplication and dq axis i.e. T is transformed to by abc three-phase by coordinate transformabc/dqComputing module, obtain reconstruct electric current two frequency multiplication
D axis component I2fd_refWith q axis component I2fq_ref, the d axis component of obtained two frequency multiplication of electric current and q axis component are injected into electric current weight
Structure controller realizes the electric current reconstructing in MMC inverter, ω in Fig. 2 by electric current reconstructing controller0Indicate power frequency 50Hz.
Two frequency multiplication reconstructing method of above-mentioned electric current provided in an embodiment of the present invention, by obtaining in MMC inverter two times of electric current
The first amplitude of frequency and the first phase angle, and according to first amplitude and the first phase angle determine reconstruct two frequency multiplication of electric current the second amplitude and
Second phase angle obtains the expression formula of reconstruct two frequency multiplication of electric current, to pass through electric current weight according to the expression formula of reconstruct two frequency multiplication of electric current
Two frequency multiplication of electric current of structure Controller Reconfiguration MMC inverter.Due to reconstruct two frequency multiplication of electric current the second amplitude and first amplitude it is big
Small identical, the second phase angle differs 180 degree with the first phase angle, with the average value of this obtained electric current and virtual value and reconstructs preceding electric current
Average value and virtual value correspond to identical, electric current not will increase, therefore can prevent stopping loss while reducing voltage fluctuation of capacitor
The increase of consumption.
For ease of understanding, a kind of specific implementation based on two frequency multiplication reconstructing method of electric current provided in this embodiment is given below
Mode, the flow chart of two frequency multiplication reconstructing method of another electric current shown in Figure 3, method includes the following steps:
Step S302 obtains the target component in MMC inverter；Wherein, target component includes power-factor angle, modulation
Than, it is a variety of in current dc component, angular frequency, reactance value and capacitance.
Target component is used for the amplitude and phase angle of calculating current, is the ginseng in amplitude calculation formula and phase calculation formula
Number.
Step S304 is calculated separately to obtain MMC and be changed according to target component by amplitude calculation formula and phase calculation formula
Flow the first amplitude and the first phase angle of two frequency multiplication of electric current in device.
Amplitude calculation formula and phase calculation formula are as follows:
Wherein,IaSide group wave current effective value is exchanged for inverter；Iad
For bridge arm current DC component,For the power-factor angle of inverter, M is modulation ratio, and N is bridge arm submodule number, and ω is angle
Frequency, LsFor bridge arm reactance value, cdFor submodule capacitor's capacity.Above-mentioned all amounts is known quantities or can measure from primary system,
Or can be obtained by calculation, therefore, the MMC change of current can be respectively obtained by above-mentioned amplitude calculation formula and phase calculation formula
The first amplitude I of two frequency multiplication of electric current in device2fWith the first phase angle theta.
Step S306 determines the second amplitude and the second phase of reconstruct two frequency multiplication of electric current according to first amplitude and the first phase angle
Angle obtains the expression formula of reconstruct two frequency multiplication of electric current；Wherein, the second amplitude is identical as the size of first amplitude, the second phase angle and
One phase angle differs 180 degree.
The expression formula for injecting the MMC converter valve bridge arm current before and after circulation is as follows:
Wherein, Iap1Bridge arm current expression formula (by taking bridge arm in A phase as an example) when being operated normally for MMC, Iap2For injection two
The expression formula of bridge arm current after frequency multiplication electric current, IdcFor the DC component amplitude of bridge arm current, IsFor bridge arm current fundamental component
Amplitude, I2sFor two harmonic amplitude of bridge arm current,For the phase angle of bridge arm current fundamental wave,The phase of two frequency multiplication of bridge arm current
Angle.By Iap1Current expression and Iap2Current expression can be seen that in two current expressions only have two harmonics be
Opposite number, other components are identical, and it is identical that two harmonics are that opposite number can be regarded as amplitude, and phase angle differs 180 degree.
The average value of bridge arm current and the calculation formula of virtual value are as follows:
Wherein, ipaFor the instantaneous value of bridge arm current, Iap_rmsFor the virtual value of bridge arm current, Iap_aveFor the flat of bridge arm current
Mean value, T indicate the period of bridge arm current.By formula it can be seen that bridge arm current Iap1And Iap2Average value and virtual value be phase
Deng, therefore after injecting two frequency multiplication electric currents of the second amplitude and the second phase angle, the virtual value and average value of electric current will not increase,
Loss will not increased.Since the decline of power frequency can be such that voltage fluctuation of capacitor increases, two frequency multiplication electric current energy are injected
Enough reduce the fluctuation of capacitance voltage.
Step S308, according to the second amplitude, the second phase angle and Clark transformation for mula, by the corresponding reconstruct electric current of abc tri-
Two frequencys multiplication transform to α β axis, obtain two frequency multiplication of reconstruct electric current of α β axis.
Clark transformation for mula is coordinate transform, abc three-phase coordinate is transformed to two phase coordinates of α β, it can will be in abc tri-
Current transformation in phase coordinates is to α β axis.
Two frequency multiplication of reconstruct electric current of α β axis is transformed to dq axis according to Park transformation for mula by step S310, obtains reconstruct electricity
Flow the d axis component and q axis component of two frequencys multiplication.
Two frequency multiplication of electric current is reconstructed after Clark transformation and Park transformation, i.e., is sat by abc three-phase coordinate transform to dq two-phase
Mark, such as the T of Fig. 2abc/dqComputing module, that is, abc to dq coordinate transform.
D axis component and q axis component are input to electric current reconstructing controller by step S312.
A kind of schematic diagram of the reconstructed module of two harmonic of electric current as described in Figure 4, d axis component I2fd_refWith q axis point
Measure I2fq_refThe circulation reconfigurable controller in Fig. 5 i.e. electric current reconstructing controller is adjusted and be input to by PI, realizes two times of electric current
The reconstruct of frequency.
In conclusion two frequency multiplication reconstructing method of above-mentioned electric current provided in an embodiment of the present invention, due to reconstructing two frequency multiplication of electric current
The second amplitude it is identical as the size of first amplitude, the second phase angle differs 180 degree with the first phase angle, with the flat of this obtained electric current
Mean value and virtual value and the average value and virtual value for reconstructing preceding electric current are corresponding identical, and electric current not will increase, therefore reduce capacitor
The increase of loss can be prevented while voltage fluctuation.
Corresponding to two frequency multiplication reconstructing method of aforementioned currents, the embodiment of the invention provides a kind of reconstruct of two frequency multiplication of electric current to fill
It sets, referring to a kind of structural block diagram of two frequency multiplication of electric current reconstruct device shown in Fig. 6, which is comprised the following modules:
Module 602 is obtained, for obtaining the first amplitude and the first phase angle of two frequency multiplication of electric current in MMC inverter；
Determining module 604, for determined according to first amplitude and the first phase angle reconstruct two frequency multiplication of electric current the second amplitude and
Second phase angle obtains the expression formula of reconstruct two frequency multiplication of electric current；Wherein, the second amplitude is identical as the size of first amplitude, the second phase
Angle differs 180 degree with the first phase angle；
Reconstructed module 606 passes through electric current reconstructing Controller Reconfiguration MMC for the expression formula according to reconstruct two frequency multiplication of electric current
Two frequency multiplication of electric current of inverter.
Two frequency multiplication of above-mentioned electric current provided in an embodiment of the present invention reconstructs device, by obtaining in MMC inverter two times of electric current
The first amplitude of frequency and the first phase angle, and according to first amplitude and the first phase angle determine reconstruct two frequency multiplication of electric current the second amplitude and
Second phase angle obtains the expression formula of reconstruct two frequency multiplication of electric current, to pass through electric current weight according to the expression formula of reconstruct two frequency multiplication of electric current
Two frequency multiplication of electric current of structure Controller Reconfiguration MMC inverter.Due to reconstruct two frequency multiplication of electric current the second amplitude and first amplitude it is big
Small identical, the second phase angle differs 180 degree with the first phase angle, with the average value of this obtained electric current and virtual value and reconstructs preceding electric current
Average value and virtual value correspond to identical, electric current not will increase, therefore can prevent stopping loss while reducing voltage fluctuation of capacitor
The increase of consumption.
Above-mentioned acquisition module 602 is further used for: obtaining the target component in MMC inverter；Wherein, target component includes
It is a variety of in power-factor angle, modulation ratio, current dc component, angular frequency, reactance value and capacitance；According to target component, lead to
It crosses amplitude calculation formula and phase calculation formula calculates separately to obtain the first amplitude and first of two frequency multiplication of electric current in MMC inverter
Phase angle.
Above-mentioned reconstructed module 604 is further used for: according to the second amplitude and the second phase angle, will reconstruct two frequency multiplication of electric current by
Abc three-phase transforms to dq axis, obtains the d axis component and q axis component of reconstruct two frequency multiplication of electric current；D axis component and q axis component are inputted
To electric current reconstructing controller.
Above-mentioned reconstructed module 604 is also used to: according to Clark transformation for mula, by corresponding two frequency multiplication of reconstruct electric current of abc tri-
α β axis is transformed to, two frequency multiplication of reconstruct electric current of α β axis is obtained；According to Park transformation for mula, two frequency multiplication of reconstruct electric current of α β axis is become
Change to dq axis.
The technical effect of device provided by the present embodiment, realization principle and generation is identical with previous embodiment, for letter
It describes, Installation practice part does not refer to place, can refer to corresponding contents in preceding method embodiment.
The embodiment of the invention provides a kind of electronic equipment, the structural schematic diagram of a kind of electronic equipment shown in Figure 7,
The electronic equipment includes: processor 70, memory 71, bus 72 and communication interface 73, the processor 70,73 and of communication interface
Memory 71 is connected by bus 72；Processor 70 is for executing the executable module stored in memory 71, such as computer
Program.
Wherein, memory 71 may include high-speed random access memory (RAM, Random Access Memory),
It may further include non-labile memory (non-volatile memory), for example, at least a magnetic disk storage.By extremely
A few communication interface 73 (can be wired or wireless) is realized logical between the system network element and at least one other network element
Letter connection, can be used internet, wide area network, local network, Metropolitan Area Network (MAN) etc..
Bus 72 can be isa bus, pci bus or eisa bus etc..The bus can be divided into address bus, data
Bus, control bus etc..Only to be indicated with a four-headed arrow convenient for indicating, in Fig. 7, it is not intended that an only bus or
A type of bus.
Wherein, memory 71 is for storing program, and the processor 70 executes the journey after receiving and executing instruction
Sequence, method performed by the device that the stream process that aforementioned any embodiment of the embodiment of the present invention discloses defines can be applied to handle
In device 70, or realized by processor 70.
Processor 70 may be a kind of IC chip, the processing capacity with signal.During realization, above-mentioned side
Each step of method can be completed by the integrated logic circuit of the hardware in processor 70 or the instruction of software form.Above-mentioned
Processor 70 can be general processor, including central processing unit (Central Processing Unit, abbreviation CPU), network
Processor (Network Processor, abbreviation NP) etc.；It can also be digital signal processor (Digital Signal
Processing, abbreviation DSP), specific integrated circuit (Application Specific Integrated Circuit, referred to as
ASIC), ready-made programmable gate array (Field-Programmable Gate Array, abbreviation FPGA) or other are programmable
Logical device, discrete gate or transistor logic, discrete hardware components.It may be implemented or execute in the embodiment of the present invention
Disclosed each method, step and logic diagram.General processor can be microprocessor or the processor is also possible to appoint
What conventional processor etc..The step of method in conjunction with disclosed in the embodiment of the present invention, can be embodied directly in hardware decoding processing
Device executes completion, or in decoding processor hardware and software module combination execute completion.Software module can be located at
Machine memory, flash memory, read-only memory, programmable read only memory or electrically erasable programmable memory, register etc. are originally
In the storage medium of field maturation.The storage medium is located at memory 71, and processor 70 reads the information in memory 71, in conjunction with
Its hardware completes the step of above method.
The embodiment of the invention also provides a kind of computer readable storage medium, it is stored on computer readable storage medium
Computer program, when computer program is run by processor the step of the method for any one of execution previous embodiment.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description
Specific work process, can be with reference to the corresponding process in previous embodiment, and details are not described herein.
The computer program of two frequency multiplication reconstructing method of electric current, device and electronic equipment provided by the embodiment of the present invention produces
Product, the computer readable storage medium including storing program code, before the instruction that said program code includes can be used for execution
Method described in the embodiment of the method for face, specific implementation can be found in embodiment of the method, and details are not described herein.
It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product
It is stored in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially in other words
The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a
People's computer, server or network equipment etc.) it performs all or part of the steps of the method described in the various embodiments of the present invention.
And storage medium above-mentioned includes: that USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
The various media that can store program code such as reservoir (RAM, Random Access Memory), magnetic or disk.
Finally, it should be noted that embodiment described above, only a specific embodiment of the invention, to illustrate the present invention
Technical solution, rather than its limitations, scope of protection of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, those skilled in the art should understand that: anyone skilled in the art
In the technical scope disclosed by the present invention, it can still modify to technical solution documented by previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention, should all cover in protection of the invention
Within the scope of.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of two frequency multiplication reconstructing method of electric current, which is characterized in that the method is applied to MMC inverter, comprising:
Obtain the first amplitude and the first phase angle of two frequency multiplication of electric current in the MMC inverter；
The second amplitude and the second phase angle that reconstruct two frequency multiplication of electric current is determined according to the first amplitude and first phase angle, obtain
The expression formula of reconstruct two frequency multiplication of electric current；Wherein, second amplitude is identical as the size of the first amplitude, and described second
Phase angle differs 180 degree with first phase angle；
According to the expression formula of reconstruct two frequency multiplication of electric current, pass through the electric current of MMC inverter described in electric current reconstructing Controller Reconfiguration
Two frequencys multiplication.
2. the method according to claim 1, wherein described obtain two frequency multiplication of electric current in the MMC inverter
The step of first amplitude and the first phase angle, comprising:
Obtain the target component in the MMC inverter；Wherein, the target component includes power-factor angle, modulation ratio, electric current
It is a variety of in DC component, angular frequency, reactance value and capacitance；
According to the target component, calculate separately to obtain the MMC inverter by amplitude calculation formula and phase calculation formula
The first amplitude and the first phase angle of middle two frequency multiplication of electric current.
3. the method according to claim 1, wherein described changed by MMC described in electric current reconstructing Controller Reconfiguration
The step of flowing two frequency multiplication of electric current of device, comprising:
According to second amplitude and second phase angle, two frequency multiplication of reconstruct electric current is transformed into dq axis by abc three-phase, is obtained
To the d axis component and q axis component of reconstruct two frequency multiplication of electric current；
The d axis component and the q axis component are input to electric current reconstructing controller.
4. according to the method described in claim 3, it is characterized in that, it is described by two frequency multiplication of reconstruct electric current by tri- phase transformation of abc
The step of changing to dq axis, comprising:
According to Clark transformation for mula, corresponding two frequency multiplication of reconstruct electric current of abc tri- is transformed into α β axis, obtains α β axis
Reconstruct two frequency multiplication of electric current；
According to Park transformation for mula, two frequency multiplication of reconstruct electric current of the α β axis is transformed into dq axis.
5. a kind of two frequency multiplication of electric current reconstructs device characterized by comprising
Module is obtained, for obtaining the first amplitude and the first phase angle of two frequency multiplication of electric current in the MMC inverter；
Determining module, for determined according to the first amplitude and first phase angle reconstruct two frequency multiplication of electric current the second amplitude and
Second phase angle obtains the expression formula of reconstruct two frequency multiplication of electric current；Wherein, the size of second amplitude and the first amplitude
Identical, second phase angle differs 180 degree with first phase angle；
Reconstructed module passes through MMC described in electric current reconstructing Controller Reconfiguration for the expression formula according to reconstruct two frequency multiplication of electric current
Two frequency multiplication of electric current of inverter.
6. device according to claim 5, which is characterized in that the acquisition module is used for:
Obtain the target component in the MMC inverter；Wherein, the target component includes power-factor angle, modulation ratio, electric current
It is a variety of in DC component, angular frequency, reactance value and capacitance；
According to the target component, calculate separately to obtain the MMC inverter by amplitude calculation formula and phase calculation formula
The first amplitude and the first phase angle of middle two frequency multiplication of electric current.
7. device according to claim 5, which is characterized in that the reconstructed module is used for:
According to second amplitude and second phase angle, two frequency multiplication of reconstruct electric current is transformed into dq axis by abc three-phase, is obtained
To the d axis component and q axis component of reconstruct two frequency multiplication of electric current；
The d axis component and the q axis component are input to electric current reconstructing controller.
8. device according to claim 5, which is characterized in that the reconstructed module is also used to:
According to Clark transformation for mula, corresponding two frequency multiplication of reconstruct electric current of abc tri- is transformed into α β axis, obtains α β axis
Reconstruct two frequency multiplication of electric current；
According to Park transformation for mula, two frequency multiplication of reconstruct electric current of the α β axis is transformed into dq axis.
9. a kind of electronic equipment, which is characterized in that including processor and memory；
Computer program is stored on the memory, the computer program executes such as right when being run by the processor
It is required that 1 to 4 described in any item methods.
10. a kind of computer readable storage medium, computer program, feature are stored on the computer readable storage medium
The step of being, the described in any item methods of the claims 1 to 4 executed when the computer program is run by processor.
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| CN114039498A (en) * | 2021-11-06 | 2022-02-11 | 广东电网有限责任公司广州供电局 | Double-frequency circulating current control method and device of current converter and computer equipment |
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