CN107994761A - Method and device for cancellation module multilevel converter harmonic wave - Google Patents

Method and device for cancellation module multilevel converter harmonic wave Download PDF

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Publication number
CN107994761A
CN107994761A CN201711227576.1A CN201711227576A CN107994761A CN 107994761 A CN107994761 A CN 107994761A CN 201711227576 A CN201711227576 A CN 201711227576A CN 107994761 A CN107994761 A CN 107994761A
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China
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submodule
working status
bridge arm
current value
level converter
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CN201711227576.1A
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CN107994761B (en
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许彬
杨俊�
王秀环
王高勇
周军川
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Global Energy Interconnection Research Institute
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Global Energy Interconnection Research Institute
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • 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
    • H02M1/12—Arrangements for reducing harmonics from ac input or output
    • 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
    • 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
    • H02M7/4835—Converters with outputs that each can have more than two voltages levels comprising two or more cells, each including a switchable capacitor, the capacitors having a nominal charge voltage which corresponds to a given fraction of the input voltage, and the capacitors being selectively connected in series to determine the instantaneous output voltage

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

The invention discloses the method and device for cancellation module multilevel converter harmonic wave.This method includes obtaining the bridge arm current value of the first submodule and the working status of the first submodule, wherein, the first submodule is any submodule on any bridge arm of modularization multi-level converter, and working status includes by putting into excision and by being resected to input；According to the bridge arm current value of the first submodule and the working status of the first submodule, determine the need for the working status of the second submodule of delay switching, wherein, the second submodule is the submodules different from the first submodule working status on any bridge arm of modularization multi-level converter；When determining to need the working status of the second submodule of delay switching, after the preset time that is delayed, the working status of the second submodule is switched to the working status different from the first submodule.Eliminate the harmonic wave of output voltage content caused by dead time effect to increase, achieveed the purpose that to improve power quality.

Description

Method and device for cancellation module multilevel converter harmonic wave
Technical field
The present invention relates to field of power electronics, in particular to for cancellation module multilevel converter harmonic wave Method and device.
Background technology
Modularization multi-level converter (Modular Multilevel Converter, MMC) is due to modularization journey Degree is high, harmonic content is small, easy dilatation, the control advantage such as flexibly, have more engineer application in middle high-pressure direct current transportation field.
For modularization multi-level converter in normal work, due to the presence of capacitor voltage equalizing control, submodule is not always The switching rotation of disconnected ground, causes capacitance short-circuit, generally use in engineering in order to avoid submodule upper and lower bridge arm IGBT is simultaneously turned on The control logic of IGBT break-before-makes.By taking submodule is put into as an example, shut-off instruction first is sent out to submodule lower part IGBT, be delayed tdAfterwards Turn-on command is sent out to the IGBT on submodule top.Be delayed tdReferred to as dead time, due to the presence of dead time, can make modularization Occur some unexpected level in multilevel converter output voltage, make the output voltage waveforms of modularization multi-level converter No longer it is preferable staircase waveform, this phenomenon is known as dead time effect.Fig. 1 is modularization multi-level converter output in the prior art The waveform diagram of voltage and bridge arm current, wherein, 1 is output voltage waveforms, and 2 be output current wave.It is as shown in Figure 1, dead The presence of area's effect can cause occur pulse spine electricity in the increase of modularization multi-level converter harmonic wave of output voltage content, bridge arm Pressure, peak current, reduce power quality.
The content of the invention
An embodiment of the present invention provides the method and device for cancellation module multilevel converter harmonic wave, to solve to have The low technical problem of the power quality as caused by dead time effect when modularization multi-level converter works in technology.
One side according to embodiments of the present invention, there is provided a kind of for cancellation module multilevel converter harmonic wave Method includes：The bridge arm current value of the first submodule and the working status of the first submodule are obtained, wherein, the first submodule is Any submodule on any bridge arm of modularization multi-level converter, working status include being thrown by putting into excision and by being resected to Enter；According to the bridge arm current value of the first submodule and the working status of the first submodule, it is determined whether need delay switching The working status of two submodules, wherein, the second submodule be on any bridge arm of modularization multi-level converter with the first submodule The different submodule of block working status；When determining to need the working status of the second submodule of delay switching, when delay is default Between after, the working status of the second submodule is switched to the working status different from the first submodule.
Alternatively, according to the bridge arm current value and working status of the first submodule, it is determined whether need delay switching The working status of two submodules, including：When the working status that bridge arm current value is more than predetermined current and the first submodule is by cutting During except to input, determine to need the working status of the second submodule of delay switching；Or when bridge arm current value is less than predetermined current And first submodule working status be by putting into excision when, determine to need the working status of the second submodule of delay switching； Or when bridge arm current value is more than the working status of predetermined current and the first submodule for by putting into excision, determine to cut immediately Change the working status of the second submodule；Or when bridge arm current value is served as reasons less than the working status of predetermined current and the first submodule When being resected to input, the working status of the second submodule of switching immediately is determined.
Alternatively, preset time is the dead time of modularization multi-level converter.
Other side according to embodiments of the present invention, additionally provides a kind of humorous for cancellation module multilevel converter The device of ripple, including：Acquisition module, for obtaining the bridge arm current value of the first submodule and the work shape of the first submodule State, wherein, the first submodule is any submodule on any bridge arm of modularization multi-level converter, and working status is included by throwing Enter to excision and by being resected to input；Determining module, for the bridge arm current value and the first submodule according to the first submodule Working status, it is determined whether need the working status of the second submodule of delay switching, wherein, the second submodule is that modularization is more The submodules different from the first submodule working status on any bridge arm of level converter；Control module, for being needed when definite When wanting the working status of the second submodule of delay switching, after the preset time that is delayed, the working status of the second submodule is switched To the working status different from the first submodule.
Optionally it is determined that module includes：First determination unit, for being more than predetermined current and the first son when bridge arm current value When the working status of module is by being resected to input, determine to need the working status of the second submodule of delay switching；Second determines Unit, when the working status for being less than predetermined current and the first submodule when bridge arm current value is by putting into excision, determines Need the working status of the second submodule of delay switching；3rd determination unit, for when bridge arm current value be more than predetermined current and When the working status of first submodule is by putting into excision, the working status of the second submodule of switching immediately is determined；4th is true Order member, when the working status for being less than predetermined current and the first submodule when bridge arm current value is by being resected to input, really The working status of the second submodule of fixed switching immediately.
Alternatively, preset time is the dead time of modularization multi-level converter.
Another aspect according to embodiments of the present invention, additionally provides a kind of modularization multi-level converter, including：First Submodule, any submodule on any bridge arm of modularization multi-level converter, the working status are included by putting into Cut off and by being resected to input；Second submodule, on any bridge arm of modularization multi-level converter with the described first son The different submodule of module working status；And memory and processor, computer instruction is stored with memory, and processor leads to Computer instructions are crossed, so as to fulfill the method for any one of claim 1-4.
Another aspect according to embodiments of the present invention, additionally provides non-transient computer readable storage medium storing program for executing, its feature It is, non-transient computer readable storage medium storing program for executing is stored with computer instruction, and computer instruction is used to make computer realize right It is required that the method for any one of 1-4.
Technical solution of the embodiment of the present invention, has the following advantages that：
The embodiment of the present invention passes through the bridge arm current value and its working status according to the first submodule, it is determined whether needs prolong When switch the working status of the second submodule, and when needing delay, switch the work of the second submodule after the preset time that is delayed Make state.That is, when the submodule by being resected to input is produced and thrown less, delay excision is corresponding, by putting into excision Submodule；When the submodule by putting into excision produces throw more, delay input is corresponding, by the submodule for being resected to input Block.By the above method, the pulse spine upwardly or downwardly of ladder level appearance is eliminated, eliminates modular multilevel The harmonic wave of transverter, improves the quality of electric energy.
Brief description of the drawings
Attached drawing described herein is used for providing a further understanding of the present invention, forms the part of the present invention, this hair Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is modularization multi-level converter output voltage and the waveform diagram of bridge arm current in the prior art；
Fig. 2 is according to embodiments of the present invention a kind of optionally with the method for cancellation module multilevel converter harmonic wave Flow chart；
Fig. 3 is the waveform signal of modularization multi-level converter output voltage and bridge arm current according to embodiments of the present invention Figure；
Fig. 4 is a kind of circuit diagram of optional first submodule according to embodiments of the present invention；
Fig. 5 is a kind of Harmonics elimination of optional modularization multi-level converter output voltage according to embodiments of the present invention The structure chart of device；And
Fig. 6 is a kind of schematic diagram of optional modularization multi-level converter according to embodiments of the present invention.
Embodiment
Technical scheme is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation Example is part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill Personnel's all other embodiments obtained without making creative work, belong to the scope of protection of the invention.
It should be noted that term " first " in description and claims of this specification and above-mentioned attached drawing, " Two " etc. be for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so use Data can exchange in the appropriate case, so as to the embodiment of the present invention described herein can with except illustrating herein or Order beyond those of description is implemented.In addition, term " comprising " and " having " and their any deformation, it is intended that cover Cover it is non-exclusive include, be not necessarily limited to for example, containing the process of series of steps or unit, method, system, product or equipment Those steps or unit clearly listed, but may include not list clearly or for these processes, method, product Or the intrinsic other steps of equipment or unit.
As long as in addition, technical characteristic involved in invention described below different embodiments non-structure each other It can be combined with each other into conflict.
Embodiment one
According to embodiments of the present invention, there is provided a kind of method for cancellation module multilevel converter harmonic wave is implemented Example, Fig. 2 is a kind of stream of method optionally with cancellation module multilevel converter harmonic wave according to embodiments of the present invention Cheng Tu, as shown in Fig. 2, this method includes：
Step S11, obtains the bridge arm current value of the first submodule and the working status of the first submodule, wherein, first Submodule is any submodule on any bridge arm of modularization multi-level converter, working status include by put into excision and by It is resected to input.
Specifically, for modularization multi-level converter in normal work, submodule is always in constantly switching rotation, and first Submodule is any one submodule in multi-level inverter bridge arm, its working status can be cut by putting into Remove, or by being resected to input.
Step S12, according to the bridge arm current value of the first submodule and the working status of the first submodule, it is determined whether need The working status of the second submodule of delay switching is wanted, when needing the working status of the second submodule of delay switching, enters step Rapid S13, when the working status of the second submodule of delay switching is not required, enters step S14, switches the second submodule immediately Working status.Wherein, the second submodule be on any bridge arm of modularization multi-level converter with the first submodule working status Different submodules.
Specifically, the second submodule is submodule corresponding with the first submodule working status on bridge arm, when the first submodule When the working status of block is by being resected to input, the working status of the second submodule is by putting into excision；When the first submodule Working status when being by putting into excision, the working status of the second submodule is by being resected to input.
Step S13, after the preset time that is delayed, the working status of the second submodule is switched to different from the first submodule Working status.
Specifically, the preset time that is delayed can be time threshold set in advance, need to be delayed in definite second submodule During switch operating state, after the preset time that is delayed, the instruction of switch operating state is sent to the second submodule.
In embodiments of the present invention, according to the bridge arm current value and working status of the first submodule, it is determined whether need The working status of the second submodule of delay switching, that is to say, that when the submodule by being resected to input is produced and thrown less, delay is cut Except corresponding, by the submodule for putting into excision；When the submodule by putting into excision produces throw more, delay input corresponds to , by the submodule for being resected to input.Fig. 3 is modularization multi-level converter output voltage and bridge according to embodiments of the present invention The waveform diagram of arm electric current.Wherein, 1 is output voltage waveforms, and 2 be output current wave.The present embodiment by the above method, The pulse spine of output voltage can be effectively eliminated, the harmonic wave of modularization multi-level converter is eliminated, improves electric energy Quality.
In a kind of optional application scenarios, step S12, according to the bridge arm current value and the first submodule of the first submodule The working status of block, it is determined whether need the working status of the second submodule of delay switching, can include：
When bridge arm current value is more than the working status of predetermined current and the first submodule for by being resected to input, determine to need Want the working status of the second submodule of delay switching.
Alternatively, preset time be modularization multi-level converter dead time, predetermined current zero.
Specifically, predetermined current is pre-set current threshold, and predetermined current is preferably zero.When bridge arm current is more than Zero, and the working status of the first submodule is when being resected to input, the voltage of the first submodule output will be more to modularization The output voltage of level converter adversely affects, it is necessary to the working status of the second submodule of delay switching, to compensate first Submodule adversely affects the output voltage of modularization multi-level converter.
Under a kind of specific application scenarios, with reference to Fig. 4, the working status of above-mentioned steps is described in detail, as shown in figure 4, For any submodule of modularization multi-level converter using half-bridge structure topology, it is mainly by DC capacitor, upper and lower bridge arm IGBT units form, and IGBT units are made of IGBT and its anti-paralleled diode, and the upper bridge arm of the first submodule is by IGBT1 and two Pole pipe D1 inverse parallels are formed, and the lower bridge arm of the first submodule is made of IGBT2 and diode D2 inverse parallels, capacitance C and upper and lower bridge The IGBT units of arm are connected in parallel.Bridge arm current ismBridge arm IGBT units and the electric current at lower bridge arm IGBT units midpoint in flow direction. When bridge arm current value is more than zero, submodule capacitance in the block is discharge condition, is by cutting off in the working status of the first submodule During to input, at this time, the IGBT in the first submodule lower bridge arm is changed into turning off from opening at once, bridge arm on the first submodule IGBT needs the t that is delayeddIt is changed into opening (t from shut-off afterwardsdFor dead time) so that the first submodule will produce " few to throw ", that is, Say, there are downward pulse spine in normal pedestal level, therefore, can with the working status of the second submodule of delay switching, That is the second submodule of delay excision, wherein, time of delay can be IGBT from turning off the delay time t for being changed into openingd, pass through Delay the second submodule of excision can offset voltage harmonic caused by the first submodule " few to throw ", and power quality is improved.
When bridge arm current value is less than the working status of predetermined current and the first submodule for by putting into excision, determine to need Want the working status of the second submodule of delay switching.
Alternatively, preset time be modularization multi-level converter dead time, predetermined current zero.
Specifically, predetermined current is pre-set current threshold, for example, zero can be set to.When bridge arm current be less than zero, And the working status of the first submodule is when putting into excision, the voltage of the first submodule output will be to modular multilevel The output voltage of transverter adversely affects, it is necessary to the working status of the second submodule of delay switching, to compensate the first submodule Block adversely affects the output voltage of modularization multi-level converter.
Under a kind of specific application scenarios, with reference to Fig. 4, the working status of above-mentioned steps is described in detail, as shown in figure 4, For any submodule of modularization multi-level converter using half-bridge structure topology, it is mainly by DC capacitor, upper and lower bridge arm IGBT units form, and IGBT units are made of IGBT and its anti-paralleled diode, and the upper bridge arm of the first submodule is by IGBT1 and two Pole pipe D1 inverse parallels are formed, and the lower bridge arm of the first submodule is made of IGBT2 and diode D2 inverse parallels, capacitance C and upper and lower bridge The IGBT units of arm are connected in parallel.Bridge arm current ismBridge arm IGBT units and the electric current at lower bridge arm IGBT units midpoint in flow direction. When bridge arm current value is less than zero, submodule capacitance in the block is charged state, is by putting into the working status of the first submodule To during excision, at this time, the IGBT on the first submodule on bridge arm is changed into turning off from opening at once, the first submodule lower bridge arm IGBT needs the t that is delayeddIt is changed into opening (t from shut-off afterwardsdFor dead time), due to bridge arm anti-paralleled diode on the first submodule Presence so that the first submodule will produce " throw " more, that is to say, that there are upward pulse point in normal pedestal level Thorn, therefore, can put into the second submodule by the working status of the second submodule of delay switching, i.e. delay, wherein, delay Time can be IGBT from turning off the delay time t for being changed into openingd, the second submodule is put into by being delayed, to offset the first son Voltage harmonic caused by module " throw ", power quality are improved more.
When bridge arm current value is more than the working status of predetermined current and the first submodule for by putting into excision, determine i.e. When switch the working status of the second submodule.
Alternatively, preset time be modularization multi-level converter dead time, predetermined current zero.
Specifically, when bridge arm current value is more than zero, submodule capacitance in the block is discharge condition, in the work of the first submodule When making state as by putting into excision, without doing delay process, switch the working status of the second submodule immediately.
When bridge arm current value is less than the working status of predetermined current and the first submodule for by being resected to input, determine i.e. When switch the working status of the second submodule.
Alternatively, preset time be modularization multi-level converter dead time, predetermined current zero.
Specifically, when bridge arm current value is less than zero, submodule capacitance in the block is charged state, in the work of the first submodule When making state as by being resected to input, without doing delay process, switch the working status of the second submodule immediately.
Embodiment two
According to embodiments of the present invention, a kind of device for cancellation module multilevel converter harmonic wave is additionally provided to implement Example, Fig. 5 are a kind of harmonic elimination devices of optional modularization multi-level converter output voltage according to embodiments of the present invention Structure chart, as shown in figure 5, the device includes：
Acquisition module 40, for obtaining the bridge arm current value of the first submodule and the working status of the first submodule, its In, the first submodule is any submodule on any bridge arm of modularization multi-level converter, and working status is included by putting into Cut off and by being resected to input, particular content may refer to the corresponding description in step S11.
Determining module 42, for the bridge arm current value and the working status of the first submodule according to the first submodule, really The fixed working status for whether needing the second submodule of delay switching, wherein, the second submodule is that modularization multi-level converter is appointed The submodules different from the first submodule working status on one bridge arm, particular content may refer to accordingly retouching in step S12 State.
Control module 44, for when determining to need the working status of the second submodule of delay switching, when delay is default Between after, the working status of the second submodule is switched to the working status different from the first submodule, particular content may refer to Corresponding description in step S13.
In embodiments of the present invention, according to the bridge arm current value and working status of the first submodule, it is determined whether need The working status of the second submodule of delay switching, that is to say, that when the submodule by being resected to input is produced and thrown less, delay is cut Except corresponding, by the submodule for putting into excision；When the submodule by putting into excision produces throw more, delay input corresponds to , by the submodule for being resected to input.The embodiment of the present invention eliminates the humorous of modularization multi-level converter by the above method Ripple, improves the quality of electric energy.
In a kind of optional application scenarios, determining module 42 can include：
First determination unit, the working status for being more than predetermined current and the first submodule when bridge arm current value is by cutting During except to input, determine to need the working status of the second submodule of delay switching.
Alternatively, preset time be modularization multi-level converter dead time, predetermined current zero.
Second determination unit, the working status for being less than predetermined current and the first submodule when bridge arm current value is by throwing Enter to during excision, determine to need the working status of the second submodule of delay switching.
Alternatively, preset time be modularization multi-level converter dead time, predetermined current zero.
3rd determination unit, the working status for being more than predetermined current and the first submodule when bridge arm current value is by throwing Enter to during excision, determine the working status of the second submodule of switching immediately.
Alternatively, preset time be modularization multi-level converter dead time, predetermined current zero.
4th determination unit, the working status for being less than predetermined current and the first submodule when bridge arm current value is by cutting During except to input, the working status of the second submodule of switching immediately is determined.
Alternatively, preset time be modularization multi-level converter dead time, predetermined current zero.
Embodiment three
The embodiment of the present invention additionally provides a kind of modularization multi-level converter, and Fig. 6 is according to embodiments of the present invention one The schematic diagram of the optional modularization multi-level converter of kind, as shown in fig. 6, the modularization multi-level converter can include：The One submodule 11, any submodule on any bridge arm of modularization multi-level converter, working status are included by putting into excision Put into by being resected to；Second submodule 12, working shape with the first submodule on any bridge arm of modularization multi-level converter The different submodule of state；And memory 13 and processor 14, wherein memory 13 and processor 14, can by bus or Other modes connect, in Fig. 6 exemplified by being connected by bus.
Processor 14 can be central processing unit (Central Processing Unit, CPU).Processor 14 can be with For other general processors, digital signal processor (Digital Signal Processor, DSP), application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), field programmable gate array (Field- Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic, The chips such as discrete hardware components, or the combination of above-mentioned all kinds of chips.
Memory 13 is used as a kind of non-transient computer readable storage medium storing program for executing, available for storing non-transient software program, non- Transient computer executable program and module, as being used for cancellation module multilevel converter dead band in the embodiment of the present invention Corresponding programmed instruction/the module of method of time is (for example, acquisition module 40, determining module 42 and control module shown in Fig. 5 44).Processor 14 is stored in non-transient software program, instruction and module in memory 13 by operation, so that at execution Various function application and the data processing of device are managed, that is, realizes being changed for the more level of cancellation moduleization in above method embodiment Flow the method for device dead time.
Memory 13 can include storing program area and storage data field, wherein, storing program area can storage program area, At least one required application program of function；Storage data field can store data that processor 14 is created etc..In addition, storage Device 13 can include high-speed random access memory, can also include non-transient memory, for example, at least a magnetic disk storage Part, flush memory device or other non-transient solid-state memories.In certain embodiments, memory 13 is optional including relative to place The remotely located memory of device 14 is managed, these remote memories can pass through network connection to processor 14.The reality of above-mentioned network Example includes but not limited to internet, intranet, LAN, mobile radio communication and combinations thereof.
One or more of modules are stored in the memory 13, when being performed by the processor 14, are performed The method for cancellation module multilevel converter dead time in embodiment as shown in Figure 2.
Above-mentioned modularization multi-level converter detail can be corresponded to refering to corresponding correlation in the embodiment shown in Fig. 2 Description and effect are understood that details are not described herein again.
It is to lead to it will be understood by those skilled in the art that realizing all or part of flow in above-described embodiment method Computer program is crossed to instruct relevant hardware to complete, the program can be stored in a computer read/write memory medium In, the program is upon execution, it may include such as the flow of the embodiment of above-mentioned each method.Wherein, the storage medium can be magnetic disc, CD, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), flash memory (Flash Memory), hard disk (Hard Disk Drive, abbreviation：) or solid state hard disc HDD (Solid-State Drive, SSD) etc.；The storage medium can also include the combination of the memory of mentioned kind.
Although being described in conjunction with the accompanying the embodiment of the present invention, those skilled in the art can not depart from the present invention Spirit and scope in the case of various modification can be adapted and modification, such modifications and variations are each fallen within by appended claims institute Within the scope of restriction.

Claims (8)

  1. A kind of 1. method for cancellation module multilevel converter harmonic wave, it is characterised in that including：
    The bridge arm current value of the first submodule and the working status of first submodule are obtained, wherein, first submodule Block is any submodule on any bridge arm of the modularization multi-level converter, and the working status is included by putting into excision Put into by being resected to；
    According to the bridge arm current value of first submodule and the working status of first submodule, it is determined whether needs prolong When switch the working status of the second submodule, wherein, second submodule is any bridge of the modularization multi-level converter The submodules different from the first submodule working status on arm；
    When determining to need the working status of the second submodule described in delay switching, after the preset time that is delayed, by described second The working status of submodule is switched to the working status different from first submodule.
  2. 2. according to the method described in claim 1, it is characterized in that, the bridge arm current value according to first submodule with And the working status, it is determined whether the working status of the second submodule of delay switching is needed, including：
    When the working status that the bridge arm current value is more than predetermined current and first submodule is by being resected to input When, determine to need the working status of the second submodule described in delay switching；Or
    When the working status that the bridge arm current value is less than predetermined current and first submodule is by putting into excision When, determine to need the working status of the second submodule described in delay switching；Or
    When the working status that the bridge arm current value is more than predetermined current and first submodule is by putting into excision When, determine to switch the working status of second submodule immediately；Or
    When the working status that the bridge arm current value is less than predetermined current and first submodule is by being resected to input When, determine to switch the working status of second submodule immediately.
  3. 3. according to the method described in claim 1, it is characterized in that, the preset time is the modularization multi-level converter Dead time.
  4. A kind of 4. device for cancellation module multilevel converter harmonic wave, it is characterised in that including：
    Acquisition module, for obtaining the bridge arm current value of the first submodule and the working status of first submodule, wherein, First submodule is any submodule on any bridge arm of the modularization multi-level converter, and the working status includes By putting into excision and by being resected to input；
    Determining module, for the bridge arm current value according to first submodule and the working status of first submodule, The working status of the second submodule of delay switching is determined the need for, wherein, second submodule is that how electric the modularization is The submodules different from the first submodule working status on the flat any bridge arm of transverter；
    Control module, for when determining to need the working status of the second submodule described in delay switching, in delay preset time Afterwards, the working status of second submodule is switched to the working status different from first submodule.
  5. 5. device according to claim 4, it is characterised in that the determining module includes：
    First determination unit, for being more than the work shape of predetermined current and first submodule when the bridge arm current value When state is by being resected to input, determine to need the working status of the second submodule described in delay switching；
    Second determination unit, for being less than the work shape of predetermined current and first submodule when the bridge arm current value When state is by putting into excision, determine to need the working status of the second submodule described in delay switching；
    3rd determination unit, for being more than the work shape of predetermined current and first submodule when the bridge arm current value When state is by putting into excision, determine to switch the working status of second submodule immediately；
    4th determination unit, for being less than the work shape of predetermined current and first submodule when the bridge arm current value When state is by being resected to input, determine to switch the working status of second submodule immediately.
  6. 6. device according to claim 4, it is characterised in that the preset time is the modularization multi-level converter Dead time.
  7. A kind of 7. modularization multi-level converter, it is characterised in that including：
    First submodule, any submodule on any bridge arm of modularization multi-level converter, the working status include By putting into excision and by being resected to input；
    Second submodule, it is different from the first submodule working status on any bridge arm of modularization multi-level converter Submodule；And
    Memory and processor, are stored with computer instruction in the memory, the processor is by performing the computer Instruction, so as to fulfill the method any one of claim 1-4.
  8. 8. a kind of non-transient computer readable storage medium storing program for executing, it is characterised in that the non-transient computer readable storage medium storing program for executing is deposited Computer instruction is contained, the computer instruction is used to make the computer realize the side any one of claim 1-3 Method.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113765409A (en) * 2021-09-29 2021-12-07 厦门市必易微电子技术有限公司 Control method and power regulation method for direct alternating current-alternating current conversion circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101860203A (en) * 2010-05-28 2010-10-13 浙江大学 Optimal pressure equalizing control method of modular multilevel converter type direct current transmission system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101860203A (en) * 2010-05-28 2010-10-13 浙江大学 Optimal pressure equalizing control method of modular multilevel converter type direct current transmission system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
李云丰: "新型MMC-HVDC控制策略的研究", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113765409A (en) * 2021-09-29 2021-12-07 厦门市必易微电子技术有限公司 Control method and power regulation method for direct alternating current-alternating current conversion circuit
CN113765409B (en) * 2021-09-29 2023-12-19 厦门市必易微电子技术有限公司 Control method and power regulation method for direct alternating current-alternating current conversion circuit

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