CN106877727B - ANPC type three-level converter and its double modulation wave carrier signal modulator approach - Google Patents
ANPC type three-level converter and its double modulation wave carrier signal modulator approach Download PDFInfo
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- CN106877727B CN106877727B CN201710287590.4A CN201710287590A CN106877727B CN 106877727 B CN106877727 B CN 106877727B CN 201710287590 A CN201710287590 A CN 201710287590A CN 106877727 B CN106877727 B CN 106877727B
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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
- H02M7/53—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
- H02M7/539—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 with automatic control of output wave form or frequency
- H02M7/5395—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 with automatic control of output wave form or frequency by pulse-width modulation
-
- 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
Abstract
The present invention provides a kind of ANPC type three-level converter and its double modulation wave carrier signal modulator approach, determine the maximum value and minimum value in three-phase modulations wave, it calculates the half of the difference of each phase modulating wave and minimum value, as the first modulating wave, calculates the half of the difference of each phase modulating wave and maximum value, as the second modulating wave；Then the first pwm signal and the second pwm signal of each phase is calculated；It exports the first pwm signal and controls the first switch tube and the 6th switching tube corresponded in bridge arm；It exports the first pwm signal complementary signal and controls the 4th switching tube and the 5th switching tube corresponded in bridge arm；It exports the second pwm signal and controls the second switch corresponded in bridge arm；It exports the second pwm signal complementary signal and controls the third switching tube corresponded in bridge arm；Can be realized the modulation for inhibiting the double modulation wave carrier signal modulator approach realization of low-frequency fluctuation for ANPC type three-level converter within the scope of total power factor.
Description
Technical field
The present invention relates to power electronics field, in particular to a kind of ANPC type three-level converter and its double modulation wave
Carrier modulating method.
Background technique
ANPC (Active Neutral Point Clamped, active neutral point clamp) type three-level converter topology is mesh
One of preceding widely used three-level topology, as shown in Figure 1, its topology is derived from diode-clamped three-level converter
Topology；Also, it is similar to diode clamp three-level converter topology, ANPC type three-level converter topology equally exists directly
Flow bus Neutral-point Potential Fluctuation problem.And DC bus Neutral-point Potential Fluctuation can answer output voltage electric current THD, device voltage
The various aspects such as power, common-mode voltage, system loss impact, and therefore, it is necessary to corresponding solutions to inhibit midpoint potential wave
It is dynamic, especially inhibit the low-frequency fluctuation of more refractory reason.
Currently, inhibiting the solution of diode-clamped and ANPC type three-level topology midpoint potential low-frequency fluctuation usual
It is segmented into hardware plan and software scenario two major classes.Wherein, software scenario is because only needing to be not required to by adjusting algorithm
Want (or seldom) increase additional hardware cost, become the mainstream scheme widely used at present.Software scenario can from modulation system
It is divided into two class of the scheme based on carrier modulation and the scheme based on space vector modulation；Since space vector modulation is in hardware
The computing resource of digital processing unit is more demanding, algorithm is complex, therefore for inhibiting topological midpoint potential low-frequency fluctuation, existing
There is technology to generally use and inject specific zero-sequence component into three-phase voltage modulating wave, or further increases in DC bus
The closed-loop control of point voltage low-frequency fluctuation.
But such method based on carrier modulation is limited to system power factor and modulation degree, it can only be in a certain range
Certain inhibiting effect is played, cannot achieve inhibition low-frequency fluctuation within the scope of total power factor.
Summary of the invention
The present invention provides a kind of ANPC type three-level converter and its double modulation wave carrier signal modulator approach, to solve existing skill
It cannot achieve the problem of inhibiting low-frequency fluctuation within the scope of total power factor in art.
To achieve the above object, technical solution provided by the present application is as follows:
A kind of double modulation wave carrier signal modulator approach of ANPC type three-level converter is applied to ANPC type three-level converter
In controller, the ANPC type three-level converter include three bridge arms, each bridge arm includes: by first switch tube, second
The upper bridge arm that switching tube and the 5th switching tube are connected to form, and by third switching tube, the 4th switching tube and the 6th switching tube phase
The tie point of the even lower bridge arm of composition, the 5th switching tube and the 6th switching tube is connected with DC bus midpoint, second switch with
The tie point of third switching tube is corresponding phase ac output end；The double modulation wave carrier signal of the ANPC type three-level converter is modulated
Method includes:
Determine the maximum value and minimum value in three-phase modulations wave；
The first modulating wave and the second modulating wave of each phase is calculated；Wherein, the first modulating wave of each phase is the modulation of each phase
The half of the difference of wave and the minimum value, the second modulating wave of each phase are the half of the difference of each phase modulating wave and the maximum value；
According to the first modulating wave of each phase, the second modulating wave, upper carrier wave and lower carrier wave, the first PWM of each phase is calculated
Signal and the second pwm signal；
The first pwm signal for exporting each phase controls the first switch tube and the 6th switching tube corresponded in bridge arm；Export each phase
The first pwm signal complementary signal control the 4th switching tube and the 5th switching tube in corresponding bridge arm；Export the 2nd PWM of each phase
Signal controls the second switch in corresponding bridge arm；The the second pwm signal complementary signal for exporting each phase controls in corresponding bridge arm
Third switching tube.
Preferably, described according to the first modulating wave of each phase, the second modulating wave, upper carrier wave and lower carrier wave, it is calculated each
The first pwm signal and the second pwm signal of phase, comprising:
First modulating wave of each phase is compared with upper carrier wave respectively, obtains the first pwm signal of corresponding phase；
Second modulating wave of each phase is compared with lower carrier wave respectively, obtains the second pwm signal of corresponding phase.
Preferably, described according to the first modulating wave of each phase, the second modulating wave, upper carrier wave and lower carrier wave, it is calculated each
The first pwm signal and the second pwm signal of phase, comprising:
Whether the first modulating wave for judging each phase is zero；
The phase that first modulating wave is zero, enabling the first pwm signal is 0, and the second modulating wave is compared with lower carrier wave, is obtained
Second pwm signal of corresponding phase；
The phase that first modulating wave is not zero judges whether the second modulating wave is zero；
The phase that first modulating wave is not zero, the second modulating wave is zero, enable the first pwm signal be 1, by the first modulating wave with it is upper
Carrier wave is compared, and obtains the second pwm signal of corresponding phase；
First modulating wave is compared with upper carrier wave, obtains by the phase that the first modulating wave and the second modulating wave are not zero
First pwm signal of corresponding phase；Second modulating wave is compared with lower carrier wave, obtains the second pwm signal of corresponding phase.
Preferably, before the maximum value and minimum value in the determining three-phase modulations wave, further includes:
The three-phase modulations wave is calculated.
Preferably, it is calculated described according to the first modulating wave of each phase, the second modulating wave, upper carrier wave and lower carrier wave
Before the first pwm signal and the second pwm signal of each phase, further includes:
According to dual carrier principle stacked on top of one another, carrier wave and lower carrier wave is calculated.
A kind of ANPC type three-level converter, including controller and main circuit；Wherein:
The main circuit includes three bridge arms, and each bridge arm includes: by first switch tube, second switch and the 5th switch
The upper bridge arm that pipe is connected to form, and the lower bridge arm being connected to form by third switching tube, the 4th switching tube and the 6th switching tube, the
The tie point of five switching tubes and the 6th switching tube is connected with DC bus midpoint, the tie point of second switch and third switching tube
For corresponding phase ac output end；
The controller includes:
Determination unit, for determining maximum value and minimum value in three-phase modulations wave；
First computing unit, for the first modulating wave and the second modulating wave of each phase to be calculated；Wherein, the first of each phase
Modulating wave is the half of the difference of each phase modulating wave and the minimum value, the second modulating wave of each phase be each phase modulating wave with it is described most
The half of the difference of big value；
Second computing unit, for calculating according to the first modulating wave of each phase, the second modulating wave, upper carrier wave and lower carrier wave
Obtain the first pwm signal and the second pwm signal of each phase；
Output unit, the first switch tube and the 6th that the first pwm signal for exporting each phase controls in corresponding bridge arm are opened
Guan Guan；The the first pwm signal complementary signal for exporting each phase controls the 4th switching tube and the 5th switching tube corresponded in bridge arm；Output
Second pwm signal of each phase controls the second switch in corresponding bridge arm；Export the second pwm signal complementary signal control of each phase
Third switching tube in corresponding bridge arm.
Preferably, second computing unit be used for according to the first modulating wave of each phase, the second modulating wave, upper carrier wave and under
Carrier wave is specifically used for when the first pwm signal and the second pwm signal of each phase is calculated:
First modulating wave of each phase is compared with upper carrier wave respectively, obtains the first pwm signal of corresponding phase；
Second modulating wave of each phase is compared with lower carrier wave respectively, obtains the second pwm signal of corresponding phase.
Preferably, second computing unit be used for according to the first modulating wave of each phase, the second modulating wave, upper carrier wave and under
Carrier wave is specifically used for when the first pwm signal and the second pwm signal of each phase is calculated:
Whether the first modulating wave for judging each phase is zero；
The phase that first modulating wave is zero, enabling the first pwm signal is 0, and the second modulating wave is compared with lower carrier wave, is obtained
Second pwm signal of corresponding phase；
The phase that first modulating wave is not zero judges whether the second modulating wave is zero；
The phase that first modulating wave is not zero, the second modulating wave is zero, enable the first pwm signal be 1, by the first modulating wave with it is upper
Carrier wave is compared, and obtains the second pwm signal of corresponding phase；
First modulating wave is compared with upper carrier wave, obtains by the phase that the first modulating wave and the second modulating wave are not zero
First pwm signal of corresponding phase；Second modulating wave is compared with lower carrier wave, obtains the second pwm signal of corresponding phase.
Preferably, further includes:
Modulating wave generation unit, for determined in the determination unit maximum value in three-phase modulations wave and minimum value it
Before, the three-phase modulations wave is calculated.
Preferably, further includes:
Carrier generation unit, for the first modulating wave, the second modulating wave, upper carrier wave in the second unit according to each phase
It with lower carrier wave, is calculated before the first pwm signal and the second pwm signal of each phase, according to dual carrier principle stacked on top of one another, meter
Calculation obtains carrier wave and lower carrier wave.
The double modulation wave carrier signal modulator approach of the ANPC type three-level converter provided by the invention, is determining three-phase tune
After maximum value and minimum value in wave processed, the half of the difference of each phase modulating wave and the minimum value is calculated, as each phase
The first modulating wave, and the half of the difference of each phase modulating wave and the maximum value, the second modulating wave as each phase is calculated；
Then according to the first modulating wave of each phase, the second modulating wave, upper carrier wave and lower carrier wave, the first pwm signal of each phase is calculated
With the second pwm signal；The first pwm signal for finally exporting each phase controls the first switch tube and the 6th switch corresponded in bridge arm
Pipe；The the first pwm signal complementary signal for exporting each phase controls the 4th switching tube and the 5th switching tube corresponded in bridge arm；Output is each
Second pwm signal of phase controls the second switch in corresponding bridge arm；Export the second pwm signal complementary signal control pair of each phase
Answer the third switching tube in bridge arm；The control for each phase switching tube being realized, being pressed down with can be realized within the scope of total power factor
The double modulation wave carrier signal modulator approach of low-frequency fluctuation processed realizes the modulation for the ANPC type three-level converter.
Detailed description of the invention
Technical solution in order to illustrate the embodiments of the present invention more clearly or in the prior art to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, it is only this that interior attached drawing, which is described below,
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram for the ANPC type three-level converter that the prior art provides；
Fig. 2 is the process of the double modulation wave carrier signal modulator approach of ANPC type three-level converter provided in an embodiment of the present invention
Figure；
Fig. 3 be another embodiment of the present invention provides ANPC type three-level converter double modulation wave carrier signal modulator approach
Partial process view；
Fig. 4 be another embodiment of the present invention provides ANPC type three-level converter switching tube drive waveforms figure；
Fig. 5 be another embodiment of the present invention provides ANPC type three-level converter switching tube drive waveforms figure；
Fig. 6 be another embodiment of the present invention provides ANPC type three-level converter output waveform figure；
Fig. 7 be another embodiment of the present invention provides ANPC type three-level converter controller architecture schematic diagram.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.It is based on
Embodiment in the application, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall in the protection scope of this application.
The present invention provides a kind of double modulation wave carrier signal modulator approach of ANPC type three-level converter, to solve the prior art
In cannot achieve within the scope of total power factor inhibit low-frequency fluctuation the problem of.
Specifically, the double modulation wave carrier signal modulator approach of the ANPC type three-level converter, is applied to three level of ANPC type
Controller in converter, the ANPC type three-level converter is as shown in Figure 1, include three bridge arms, each bridge arm includes: by the
The upper bridge arm that one switching tube, second switch and the 5th switching tube are connected to form, and by third switching tube, the 4th switching tube and
The tie point of the lower bridge arm that 6th switching tube is connected to form, the 5th switching tube and the 6th switching tube is connected with DC bus midpoint,
The tie point of second switch and third switching tube is corresponding phase ac output end；Referring to Fig. 1, A phase bridge arm includes: to be opened by first
Close pipe AS1, the upper bridge arm that second switch AS2 and the 5th switching tube AS5 are connected to form, and by third switching tube AS3, the 4th
The lower bridge arm that switching tube AS4 and the 6th switching tube AS6 are connected to form, the tie point of the 5th switching tube AS5 and the 6th switching tube AS6
It is connected with DC bus midpoint, the tie point of second switch AS2 and third switching tube AS3 are A phase ac output end；B phase bridge
Arm includes: the upper bridge arm being connected to form by first switch tube BS1, second switch BS2 and the 5th switching tube BS5, and by
The lower bridge arm that three switching tube BS3, the 4th switching tube BS4 and the 6th switching tube BS6 are connected to form, the 5th switching tube BS5 and the 6th
The tie point of switching tube BS6 is connected with DC bus midpoint, and the tie point of second switch BS2 and third switching tube BS3 are B phase
Ac output end；C phase bridge arm includes: to be connected to form by first switch tube CS1, second switch CS2 and the 5th switching tube CS5
Upper bridge arm, and the lower bridge arm being connected to form by third switching tube CS3, the 4th switching tube CS4 and the 6th switching tube CS6, the 5th
The tie point of switching tube CS5 and the 6th switching tube CS6 are connected with DC bus midpoint, second switch CS2 and third switching tube
The tie point of CS3 is C phase ac output end.
The double modulation wave carrier signal modulator approach of the ANPC type three-level converter, referring to fig. 2, comprising:
S101, maximum value and minimum value in three-phase modulations wave are determined；
According to three-phase modulations wave (Ua, Ub, Uc), maximum value Umax and minimum value Umin therein are determined.
S102, the first modulating wave and the second modulating wave that each phase is calculated；Wherein, the first modulating wave of each phase is each phase
The half of the difference of modulating wave and minimum value, the second modulating wave of each phase are the half of the difference of each phase modulating wave and maximum value；
Each phase modulating wave is sought with 50% the first modulating wave U1 as corresponding phase of the difference of minimum value Umin, seeks each phase
50% second modulating wave U2 as corresponding phase of the modulating wave with the difference of maximum value Umax.
S103, according to the first modulating wave of each phase, the second modulating wave, upper carrier wave and lower carrier wave, the of each phase is calculated
One pwm signal and the second pwm signal；
Step S103 can realize by two ways, the first:
Carrier wave is same as above by each corresponding first modulating wave U1 to be compared, and acquires the first pwm signal of corresponding phase
PWM1 is compared with lower carrier wave by each corresponding second modulating wave U2, acquires the second pwm signal PWM2 of corresponding phase；
Second:
It using each corresponding first modulating wave U1 and the second modulating wave U2, uploads and involves lower carrier wave, according to respective rule
Obtain the first pwm signal PWM1 and the second pwm signal PWM2 of corresponding phase；
Preferably, the rule is referring to Fig. 3, comprising:
S201, judge whether the first modulating wave U1 of each phase is zero；
The phase that S202, the first modulating wave U1 are zero, enabling the first pwm signal PWM1 is 0 (low level), by the second modulating wave U2
The rate of exchange are carried out with lower carrier wave, obtain the second pwm signal PWM2 of corresponding phase；
The phase that S203, the first modulating wave U1 are not zero judges whether the second modulating wave U2 is zero；
S204, the phase that the first modulating wave U1 is not zero, the second modulating wave U2 is zero, enabling the first pwm signal PWM1 is 1 (high
Level), the first modulating wave U1 is compared with upper carrier wave, obtains the second pwm signal PWM2 of corresponding phase；
The phase that S205, the first modulating wave U1 and the second modulating wave U2 are not zero, by the first modulating wave U1 and upper carrier wave into
Row compares, and obtains the first pwm signal PWM1 of corresponding phase；Second modulating wave U2 is compared with lower carrier wave, obtains corresponding phase
The second pwm signal PWM2.
After executing the step S103 by the way that above two mode is one of any, step S104 is executed；
The first pwm signal control of S104, each phase of output correspond to first switch tube and the 6th switching tube in bridge arm；Output
First pwm signal complementary signal of each phase controls the 4th switching tube and the 5th switching tube in corresponding bridge arm；Export the of each phase
Two pwm signals control the second switch in corresponding bridge arm；The the second pwm signal complementary signal for exporting each phase controls corresponding bridge arm
In third switching tube.
When executing step S103 using first way, after step S104, six in each phase bridge arm of acquisition
Switching tube (first switch tube S1, second switch S2, third switching tube S3, the 4th switching tube S4, the 5th switching tube S5, the 6th
Switching tube S6) drive waveforms it is as shown in Figure 4.In one primitive period, the switching mode of same all switching tubes of bridge arm is identical,
Each switching tube had 2/3 primitive period to be in high frequency to open off state i.e. in bridge arm, and in addition 1/3 primitive period was in and opens always
Logical state or off state.
And opened in off state in high frequency, first switch tube S1 and second switch S2 have two section of 1/6 primitive period, total
Totally 1/3 primitive period is all in opening in off state.Due to the drive waveforms phase of first switch tube S1 and the 6th switching tube S6
Together, the 4th switching tube S4 and the 5th switching tube S5 drive waveforms are identical, first switch tube S1 and the 4th switching tube S4 drive waveforms
Complementation, second switch S2 and third switching tube S3 drive waveforms are complementary, and features above is not just unfolded again.
And when executing step S103 using the second way, after step S104, six in each phase bridge arm of acquisition
A switching tube (first switch tube S1, second switch S2, third switching tube S3, the 4th switching tube S4, the 5th switching tube S5,
Six switching tube S6) drive waveforms it is as shown in Figure 5.In one primitive period, first switch tube S1 in each bridge arm, the 4th are opened
Close pipe S4, the 5th switching tube S5 and the 6th switching tube S6 had 1/3 primitive period to be in high frequency to open off state, in addition 2/3
Primitive period is in opening state or off state always；And second switch S2 and third switching tube S3 are constantly in high frequency and open
Logical off state.
No matter which kind of mode to execute step S103 using, after step S104, so that three level translation of ANPC type
Each phase ac output end of device is equivalent to the three-phase output waveform at DC bus midpoint as shown in fig. 6, in a primitive period,
Each phase ac output end of ANPC type three-level converter is equivalent to the three-phase output waveform at DC bus midpoint, there is 1/3 fundamental wave
Period has positive 50% total DC bus-bar voltage, three kinds of 0, minus 50% total DC bus-bar voltage states, has 1/3 primitive period to have
Positive 50% total DC bus-bar voltage, 0 two states had 1/3 primitive period to have two kinds of 0, minus 50% total DC bus-bar voltage shapes
State.
The double modulation wave carrier signal modulator approach of the ANPC type three-level converter provided in this embodiment, realizes for each
The control of phase switching tube inhibits the double modulation wave carrier signal modulator approach of low-frequency fluctuation real can be realized within the scope of total power factor
Referring now to the modulation of ANPC type three-level converter, solve cannot achieve in the prior art inhibits low within the scope of total power factor
The problem of frequency fluctuates, and simple easily execution.
Preferably, referring to Fig. 6, the whole of the double modulation wave carrier signal modulator approach of the ANPC type three-level converter executes step
Suddenly include:
S301, three-phase modulations wave is calculated.
S302, maximum value and minimum value in three-phase modulations wave are determined；
S303, the first modulating wave and the second modulating wave that each phase is calculated；Wherein, the first modulating wave of each phase is each phase
The half of the difference of modulating wave and minimum value, the second modulating wave of each phase are the half of the difference of each phase modulating wave and maximum value；
S304, according to dual carrier principle stacked on top of one another, carrier wave and lower carrier wave is calculated.
S305, according to the first modulating wave of each phase, the second modulating wave, upper carrier wave and lower carrier wave, the of each phase is calculated
One pwm signal and the second pwm signal；
The first pwm signal control of S306, each phase of output correspond to first switch tube and the 6th switching tube in bridge arm；Output
First pwm signal complementary signal of each phase controls the 4th switching tube and the 5th switching tube in corresponding bridge arm；Export the of each phase
Two pwm signals control the second switch in corresponding bridge arm；The the second pwm signal complementary signal for exporting each phase controls corresponding bridge arm
In third switching tube.
Wherein, step S301 and S304 is mature technology in the prior art, and details are not described herein again.
The double modulation wave carrier signal modulator approach of the ANPC type three-level converter is calculated by dual carrier principle stacked on top of one another
Obtained upper carrier wave and lower carrier wave combines the first modulating wave and the second modulating wave to be modulated, and increases the duty score of " 0 " state
The freedom degree matched realizes and completely eliminates midpoint potential direct current imbalance and midpoint potential under all modulation degree and power factor
Low-frequency fluctuation.
Another embodiment of the present invention additionally provides a kind of ANPC type three-level converter, including controller and main circuit；Its
In:
Main circuit is as shown in Figure 1, include three bridge arms, each bridge arm includes: first switch tube, second switch and the 5th
The upper bridge arm that switching tube is connected to form, and the lower bridge being connected to form by third switching tube, the 4th switching tube and the 6th switching tube
The tie point of arm, the 5th switching tube and the 6th switching tube is connected with DC bus midpoint, second switch and third switching tube
Tie point is corresponding phase ac output end；Referring to Fig. 1, A phase bridge arm include: by first switch tube AS1, second switch AS2 and
The upper bridge arm that 5th switching tube AS5 is connected to form, and by third switching tube AS3, the 4th switching tube AS4 and the 6th switching tube
The tie point of the lower bridge arm that AS6 is connected to form, the 5th switching tube AS5 and the 6th switching tube AS6 are connected with DC bus midpoint, the
The tie point of two switching tube AS2 and third switching tube AS3 are A phase ac output end；B phase bridge arm includes: by first switch tube
The upper bridge arm that BS1, second switch BS2 and the 5th switching tube BS5 are connected to form, and by third switching tube BS3, the 4th switch
The tie point of the lower bridge arm that pipe BS4 and the 6th switching tube BS6 are connected to form, the 5th switching tube BS5 and the 6th switching tube BS6 and straight
It flows bus midpoint to be connected, the tie point of second switch BS2 and third switching tube BS3 are B phase ac output end；C phase bridge arm packet
It includes: the upper bridge arm being connected to form by first switch tube CS1, second switch CS2 and the 5th switching tube CS5, and opened by third
Close pipe CS3, the lower bridge arm that the 4th switching tube CS4 and the 6th switching tube CS6 are connected to form, the switch of the 5th switching tube CS5 and the 6th
The tie point of pipe CS6 is connected with DC bus midpoint, and second switch CS2 is that C phase exchanges with the tie point of third switching tube CS3
Output end.
The controller is referring to Fig. 7, comprising:
Determination unit 101, for determining maximum value and minimum value in three-phase modulations wave；
First computing unit 102, for the first modulating wave and the second modulating wave of each phase to be calculated；Wherein, each phase
First modulating wave is the half of the difference of each phase modulating wave and minimum value, and the second modulating wave of each phase is each phase modulating wave and maximum value
Difference half；
Second computing unit 103, for according to the first modulating wave of each phase, the second modulating wave, upper carrier wave and lower carrier wave, meter
Calculation obtains the first pwm signal and the second pwm signal of each phase；
Output unit 104, the first pwm signal for exporting each phase control the first switch tube and the 6th in corresponding bridge arm
Switching tube；The the first pwm signal complementary signal for exporting each phase controls the 4th switching tube and the 5th switching tube corresponded in bridge arm；It is defeated
The second pwm signal of each phase controls the second switch in corresponding bridge arm out；Export the second pwm signal complementary signal control of each phase
Make the third switching tube in corresponding bridge arm.
Preferably, the second computing unit 103 be used for according to the first modulating wave of each phase, the second modulating wave, upper carrier wave and under
Carrier wave is specifically used for when the first pwm signal and the second pwm signal of each phase is calculated:
First modulating wave of each phase is compared with upper carrier wave respectively, obtains the first pwm signal of corresponding phase；
Second modulating wave of each phase is compared with lower carrier wave respectively, obtains the second pwm signal of corresponding phase.
Alternatively, the second computing unit 103 is used for according to the first modulating wave of each phase, the second modulating wave, upper carrier wave and downloading
Wave is specifically used for when the first pwm signal and the second pwm signal of each phase is calculated:
Whether the first modulating wave for judging each phase is zero；
Second modulating wave is compared by the phase that the first modulating wave is zero with lower carrier wave, obtains the 2nd PWM letter of corresponding phase
Number；
The phase that first modulating wave is not zero judges whether the second modulating wave is zero；
First modulating wave is compared by the phase that the second modulating wave is zero with upper carrier wave, obtains the first PWM letter of corresponding phase
Number；
First modulating wave is compared with upper carrier wave, obtains by the phase that the first modulating wave and the second modulating wave are not zero
First pwm signal of corresponding phase；Second modulating wave is compared with lower carrier wave, obtains the second pwm signal of corresponding phase.
Preferably, ANPC type three-level converter, on the basis of Fig. 7, further includes:
Modulating wave generation unit, for counting before determination unit determines maximum value and minimum value in three-phase modulations wave
Calculation obtains three-phase modulations wave；
Carrier generation unit, for second unit according to the first modulating wave of each phase, the second modulating wave, upper carrier wave and under
Carrier wave is calculated before the first pwm signal and the second pwm signal of each phase, according to dual carrier principle stacked on top of one another, calculates
To upper carrier wave and lower carrier wave.
Remaining working principle is same as the previously described embodiments, no longer repeats one by one herein.
Each embodiment is described in a progressive manner in the present invention, the highlights of each of the examples are with other realities
The difference of example is applied, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment
Speech, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is referring to method part illustration
?.
The above described is only a preferred embodiment of the present invention, being not intended to limit the present invention in any form.Though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention.It is any to be familiar with those skilled in the art
Member, without departing from the scope of the technical proposal of the invention, all using the methods and technical content of the disclosure above to the present invention
Technical solution makes many possible changes and modifications or equivalent example modified to equivalent change.Therefore, it is all without departing from
The content of technical solution of the present invention, according to the technical essence of the invention any simple modification made to the above embodiment, equivalent
Variation and modification, all of which are still within the scope of protection of the technical scheme of the invention.
Claims (6)
1. a kind of double modulation wave carrier signal modulator approach of ANPC type three-level converter, which is characterized in that be applied to ANPC type three
Controller in level converter, the ANPC type three-level converter include three bridge arms, and each bridge arm includes: to be opened by first
The upper bridge arm that Guan Guan, second switch and the 5th switching tube are connected to form, and by third switching tube, the 4th switching tube and the 6th
The tie point of the lower bridge arm that switching tube is connected to form, the 5th switching tube and the 6th switching tube is connected with DC bus midpoint, and second
The tie point of switching tube and third switching tube is corresponding phase ac output end；The double modulation wave of the ANPC type three-level converter
Carrier modulating method includes:
Determine the maximum value and minimum value in three-phase modulations wave；
The first modulating wave and the second modulating wave of each phase is calculated；Wherein, the first modulating wave of each phase be each phase modulating wave with
The half of the difference of the minimum value, the second modulating wave of each phase are the half of the difference of each phase modulating wave and the maximum value；
According to the first modulating wave of each phase, the second modulating wave, upper carrier wave and lower carrier wave, the first pwm signal of each phase is calculated
With the second pwm signal；
The first pwm signal for exporting each phase controls the first switch tube and the 6th switching tube corresponded in bridge arm；Export the of each phase
One pwm signal complementary signal controls the 4th switching tube and the 5th switching tube in corresponding bridge arm；Export the second pwm signal of each phase
Control the second switch in corresponding bridge arm；The the second pwm signal complementary signal for exporting each phase controls the third corresponded in bridge arm
Switching tube；
Wherein, described according to the first modulating wave of each phase, the second modulating wave, upper carrier wave and lower carrier wave, the of each phase is calculated
One pwm signal and the second pwm signal, comprising:
Whether the first modulating wave for judging each phase is zero；
The phase that first modulating wave is zero, enabling the first pwm signal is 0, and the second modulating wave is compared with lower carrier wave, is corresponded to
Second pwm signal of phase；
The phase that first modulating wave is not zero judges whether the second modulating wave is zero；
The phase that first modulating wave is not zero, the second modulating wave is zero, enabling the first pwm signal is 1, by the first modulating wave and upper carrier wave
It is compared, obtains the second pwm signal of corresponding phase；
First modulating wave is compared with upper carrier wave, is corresponded to by the phase that the first modulating wave and the second modulating wave are not zero
First pwm signal of phase；Second modulating wave is compared with lower carrier wave, obtains the second pwm signal of corresponding phase.
2. the double modulation wave carrier signal modulator approach of ANPC type three-level converter according to claim 1, which is characterized in that
Before the maximum value and minimum value in the determining three-phase modulations wave, further includes:
The three-phase modulations wave is calculated.
3. the double modulation wave carrier signal modulator approach of ANPC type three-level converter according to claim 1, which is characterized in that
Described according to the first modulating wave of each phase, the second modulating wave, upper carrier wave and lower carrier wave, the first PWM letter of each phase is calculated
Number and the second pwm signal before, further includes:
According to dual carrier principle stacked on top of one another, carrier wave and lower carrier wave is calculated.
4. a kind of ANPC type three-level converter, which is characterized in that including controller and main circuit；Wherein:
The main circuit includes three bridge arms, and each bridge arm includes: by first switch tube, second switch and the 5th switching tube phase
The even upper bridge arm of composition, and the lower bridge arm being connected to form by third switching tube, the 4th switching tube and the 6th switching tube, the 5th opens
The tie point for closing pipe and the 6th switching tube is connected with DC bus midpoint, and the tie point of second switch and third switching tube is pair
Answer phase ac output end；
The controller includes:
Determination unit, for determining maximum value and minimum value in three-phase modulations wave；
First computing unit, for the first modulating wave and the second modulating wave of each phase to be calculated；Wherein, the first modulation of each phase
Wave is the half of the difference of each phase modulating wave and the minimum value, and the second modulating wave of each phase is each phase modulating wave and the maximum value
Difference half；
Second computing unit, for being calculated according to the first modulating wave of each phase, the second modulating wave, upper carrier wave and lower carrier wave
The first pwm signal and the second pwm signal of each phase；
Output unit, the first pwm signal for exporting each phase control first switch tube and the 6th switching tube in corresponding bridge arm；
The the first pwm signal complementary signal for exporting each phase controls the 4th switching tube and the 5th switching tube corresponded in bridge arm；Export each phase
The second pwm signal control the second switch in corresponding bridge arm；The the second pwm signal complementary signal control for exporting each phase corresponds to
Third switching tube in bridge arm；
Second computing unit is used to be calculated according to the first modulating wave of each phase, the second modulating wave, upper carrier wave and lower carrier wave
When to the first pwm signal of each phase and the second pwm signal, it is specifically used for:
Whether the first modulating wave for judging each phase is zero；
The phase that first modulating wave is zero, enabling the first pwm signal is 0, and the second modulating wave is compared with lower carrier wave, is corresponded to
Second pwm signal of phase；
The phase that first modulating wave is not zero judges whether the second modulating wave is zero；
The phase that first modulating wave is not zero, the second modulating wave is zero, enabling the first pwm signal is 1, by the first modulating wave and upper carrier wave
It is compared, obtains the second pwm signal of corresponding phase；
First modulating wave is compared with upper carrier wave, is corresponded to by the phase that the first modulating wave and the second modulating wave are not zero
First pwm signal of phase；Second modulating wave is compared with lower carrier wave, obtains the second pwm signal of corresponding phase.
5. ANPC type three-level converter according to claim 4, which is characterized in that further include:
Modulating wave generation unit, for counting before the determination unit determines maximum value and minimum value in three-phase modulations wave
Calculation obtains the three-phase modulations wave.
6. ANPC type three-level converter according to claim 4, which is characterized in that further include:
Carrier generation unit, for the first modulating wave, the second modulating wave, upper carrier wave in second computing unit according to each phase
It with lower carrier wave, is calculated before the first pwm signal and the second pwm signal of each phase, according to dual carrier principle stacked on top of one another, meter
Calculation obtains carrier wave and lower carrier wave.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103401456A (en) * | 2013-07-09 | 2013-11-20 | 西安交通大学 | Dual-modulating wave dual-carrier modulation method for voltage type three-level neutral point clamped converter |
| CN103401460A (en) * | 2013-06-29 | 2013-11-20 | 华为技术有限公司 | Method and device for PWM (pulse width modulation) of three-phase carrier waves |
-
2017
- 2017-04-27 CN CN201710287590.4A patent/CN106877727B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103401460A (en) * | 2013-06-29 | 2013-11-20 | 华为技术有限公司 | Method and device for PWM (pulse width modulation) of three-phase carrier waves |
| CN103401456A (en) * | 2013-07-09 | 2013-11-20 | 西安交通大学 | Dual-modulating wave dual-carrier modulation method for voltage type three-level neutral point clamped converter |
Non-Patent Citations (2)
| Title |
|---|
| 《Fast-Processing Modulation Strategy for the Neutral-Point-Clamped Converter With Total Elimination of Low-Frequency Voltage Oscillations in the Neutral Point》;Josep Pou et al.;《IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS》;20070831;第54卷(第4期);第6-7,16-17,32-33页，图2-1 |
| 《二极管箝位型三电平变换器母线电容电压控制策略研究》;张灿;《中国优秀硕士学位论文》;20110601;全文 |
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