CN102710153B - Modeling method of single-phase bridge-type three-level rectifier - Google Patents
Modeling method of single-phase bridge-type three-level rectifier Download PDFInfo
- Publication number
- CN102710153B CN102710153B CN201210192685.5A CN201210192685A CN102710153B CN 102710153 B CN102710153 B CN 102710153B CN 201210192685 A CN201210192685 A CN 201210192685A CN 102710153 B CN102710153 B CN 102710153B
- Authority
- CN
- China
- Prior art keywords
- brachium pontis
- described rectifier
- rectifier
- current
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Rectifiers (AREA)
Abstract
The invention discloses a modeling method of a single-phase bridge-type three-level rectifier, which comprises the following steps of: judging whether a control signal is input in an input side of the rectifier; if so, summarizing a relationship between output potentials of input points of a first bridge arm and a second bridge arm relative to a midpoint and AC side voltage output by the rectifier, a relationship among upper bridge arm current of the first bridge arm, upper bridge arm current of the second bridge arm and upper bridge arm current and a relationship among lower bridge current of the first bridge arm, lower bridge arm current of the second bridge arm and lower bridge arm current according to the signal control modes of the first bridge arm and the second bridge arm and a current direction of input current; and if not, comparing grid side voltage and the DC side intermediate voltage and summarizing a relationship between the AC side voltage and the DC side intermediate voltage of the rectifier and a relationship between the AC side current and the intermediate current of the rectifier according to the conduction situation of a diode. The modeling method disclosed by the invention is simple in implementation steps, small in calculated amount and convenient and rapid for modeling of the rectifier.
Description
Technical field
The present invention relates to the modeling technique field of rectifier, more particularly, relate to a kind of modeling method of single-phase bridge three level rectifiers.
Background technology
At present, along with scientific and technological progress, AC Drive becomes an important directions of railway dragging transmission development, be the AC-DC-AC converter that mainly comprises rectifier, intermediate dc link and inverter as the core devices of AC Drive, wherein rectifier is one of emphasis of current AC Drive research.
In AC Drive main circuit, common rectifier mainly contains single-phase bridge two level rectifiers and single-phase bridge three level rectifiers, single-phase bridge two level rectifiers relatively, single-phase bridge three level rectifiers have the electromagnetic interference of minimizing, reduce power switch pipe voltage strength, reduce switching frequency, make the advantage such as the more approaching sine of input electric current and the remarkable minimizing of harmonic content.Therefore, the application of single-phase bridge three level rectifiers in AC Drive field is more and more extensive.If the modeling method of single-phase bridge three level rectifier fast and stables can be provided, provide effective means and instrument by the analysis for trailer system, design and improvement.
At present, single-phase bridge three level rectifiers conventionally adopt and utilize the converter module carrying in the SimPowerSystem module library of MATLAB emulation to build modeling method and the switch function modeling method of single-phase bridge three level rectifiers.
But, due to utilize the current transformer carrying in the SimPowerSystem module library of MATLAB emulation three-level inverter modeling the details of a lot of rectifiers, be often used for off-line simulation, the in the situation that of system real-time simulation, this modeling method is too careful can not reach the fireballing requirement of system emulation, and also easily runs into and cannot download the problem inaccurate with algorithm in real-time simulation.
Use switch function modeling method to complete the modeling method of single-phase bridge three level rectifiers, owing to needing to set up and contact with the electric parameters in circuit on side of overhead contact line, DC side loop in state equation, artificially the Mathematical Modeling of the Mathematical Modeling of rectifier and circuit on side of overhead contact line and intermediate loop is coupled, this will be unfavorable for that rectifier model applies in a flexible way in all kinds of AC Drive main circuit topology frameworks; Meanwhile, because state equation is subject to the restriction of calculation method in the process solving, even because algorithm picks is improper, will cause state variable to solve and disperse; And the method is not considered the simulation to not controlling rectification, be unfavorable for integrality and the authenticity of rectifier modeling.
Summary of the invention
In view of this, the invention provides a kind of modeling method of single-phase bridge three level rectifiers, simple with performing step, amount of calculation is little and conveniently single-phase bridge three level rectifiers are carried out to modeling.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of modeling method of single-phase bridge three level rectifiers, comprising:
Judge and in the input side of rectifier, whether have pwm control signal input;
If have, according to the sense of current of input current in the pattern of pwm control signal of described rectifier the first brachium pontis and the second brachium pontis and the input side of described rectifier, draw the conducting situation of described rectifier bridge arm, and summarize according to the conducting situation of described brachium pontis:
The first brachium pontis input point of described rectifier is the relation with respect to the output potential of mid point and the AC voltage of described rectifier output with respect to the output potential of mid point, the second brachium pontis input point;
The relation of upper brachium pontis electric current, the upper brachium pontis electric current of the second brachium pontis and the upper brachium pontis electric current of described rectifier of the first brachium pontis of described rectifier;
The relation of lower brachium pontis electric current, the lower brachium pontis electric current of the second brachium pontis and the lower brachium pontis electric current of described rectifier of the first brachium pontis of described rectifier;
Otherwise the size of the DC side intermediate voltage of the voltage on line side of more described rectifier and described rectifier, draws the conducting situation of diode in described rectifier, and summarizes according to the conducting situation of diode in described rectifier:
The relation of the AC voltage of described rectifier and the DC side intermediate voltage of described rectifier;
The relation of the ac-side current of described rectifier and the intermediate current of described rectifier.
Preferably, the pattern of the pwm control signal of described rectifier is " height is low ", " low height is low ", " low high height ", " low height " or " low height is high ".
Preferably, in the input side of described rectifier the sense of current of input current for being more than or equal to zero direction or being less than zero direction.
Preferably, the first brachium pontis input point of the described rectifier of described conclusion is specially with respect to the relation of the output potential of mid point and the AC voltage of rectifier output with respect to output potential, the second brachium pontis input point of mid point:
According to the sense of current of input current in the input side of the different pwm control signal of input and described rectifier, draw the conducting situation of described rectifier the first brachium pontis and the second brachium pontis;
According to the conducting situation of described rectifier the first brachium pontis and the second brachium pontis, the first brachium pontis input point that detects the AC magnitude of voltage of described rectifier output, described rectifier is the output potential value with respect to mid point with respect to the output potential value of mid point and the second brachium pontis input point;
The AC magnitude of voltage of the described rectifier output relatively detecting, the first brachium pontis input point of described rectifier are determined the AC voltage of described rectifier output, described rectifier with respect to the output potential value of mid point the first brachium pontis input point with respect to the output potential value of mid point and the second brachium pontis input point is the relation with respect to the output potential of mid point with respect to the output potential of mid point and the second brachium pontis input point.
Preferably, the first brachium pontis input point of described rectifier with respect to output potential, the second brachium pontis input point of mid point with respect to the pass of the output potential of mid point and the AC voltage of described rectifier output is:
U
ac=U
U-U
V；
Wherein, U
acfor the AC voltage of rectifier output; U
uthe first brachium pontis input point is with respect to the output potential of mid point; U
vthe first brachium pontis input point is with respect to the output potential of mid point.
Preferably, the relation of concluding upper brachium pontis electric current, the upper brachium pontis electric current of the second brachium pontis and the upper brachium pontis electric current of described rectifier of the first brachium pontis of described rectifier is specially:
According to the sense of current of input current in the input side of the different pwm control signal of input and described rectifier, draw the conducting situation of brachium pontis on described rectifier the first brachium pontis and the second brachium pontis;
According to the conducting situation of brachium pontis on described rectifier the first brachium pontis and the second brachium pontis, detect upper brachium pontis current value, the upper brachium pontis current value of the second brachium pontis and the upper brachium pontis current value of described rectifier of described rectifier the first brachium pontis;
The upper brachium pontis current value of the upper brachium pontis current value of described rectifier the first brachium pontis relatively detecting, the upper brachium pontis current value of the second brachium pontis and described rectifier is determined the relation of upper brachium pontis electric current, the upper brachium pontis electric current of the second brachium pontis and the upper brachium pontis electric current of described rectifier of the first brachium pontis of described rectifier.
Preferably, the pass of the upper brachium pontis electric current of the first brachium pontis of described rectifier, the upper brachium pontis electric current of the second brachium pontis and the upper brachium pontis electric current of described rectifier is:
i
dcu=i
uU+i
uV；
Wherein, i
dcufor the upper brachium pontis electric current of rectifier; i
uUit is brachium pontis electric current on the first brachium pontis; i
uVit is brachium pontis electric current on the second brachium pontis.
Preferably, the relation of concluding lower brachium pontis electric current, the lower brachium pontis electric current of the second brachium pontis and the lower brachium pontis electric current of described rectifier of the first brachium pontis of described rectifier is specially:
According to the sense of current of input current in the input side of the different pwm control signal of input and described rectifier, draw the conducting situation of brachium pontis under described rectifier the first brachium pontis and the second brachium pontis;
According to the conducting situation of brachium pontis under described rectifier the first brachium pontis and the second brachium pontis, detect lower brachium pontis current value, the lower brachium pontis current value of the second brachium pontis and the lower brachium pontis current value of described rectifier of described rectifier the first brachium pontis;
The lower brachium pontis current value of the lower brachium pontis current value of described rectifier the first brachium pontis relatively detecting, the lower brachium pontis current value of the second brachium pontis and described rectifier is determined the relation of lower brachium pontis electric current, the lower brachium pontis electric current of the second brachium pontis and the lower brachium pontis electric current of described rectifier of the first brachium pontis of described rectifier.
Preferably, the pass of the lower brachium pontis electric current of the first brachium pontis of described rectifier, the lower brachium pontis electric current of the second brachium pontis and the lower brachium pontis electric current of described rectifier is:
i
dcd=i
dU+i
dV；
Wherein, i
dcdfor the lower brachium pontis electric current of rectifier; i
dUit is brachium pontis electric current under the first brachium pontis; i
dVit is brachium pontis electric current under the second brachium pontis.
Preferably, the relation of concluding the AC voltage of described rectifier and the DC side intermediate voltage of described rectifier is specially:
Detect and the size of the voltage on line side value of more described rectifier and the DC side intermediate voltage value of described rectifier, draw the conducting situation of diode in described rectifier; According to the conducting situation of diode in described rectifier, detect the AC magnitude of voltage of described rectifier;
The DC side intermediate voltage value of the voltage on line side value of the described rectifier relatively detecting, described rectifier and the AC magnitude of voltage of described rectifier are determined the DC side intermediate voltage of the voltage on line side of described rectifier, described rectifier and the AC voltage relationship of described rectifier.
Preferably, the AC magnitude of voltage of rectifier determines that the DC side intermediate voltage of the voltage on line side of described rectifier, described rectifier and the AC voltage relationship of described rectifier are:
Work as U
s>U
dctime, U
ac=U
dc;
When-U
s>U
dctime, U
ac=-U
dc;
When | U
s|≤U
dctime, U
ac=U
s;
Wherein, U
sfor the voltage on line side of rectifier; U
acfor the AC voltage of rectifier; U
dcfor the DC side intermediate voltage of rectifier.
Preferably, the relation of concluding the ac-side current of described rectifier and the intermediate current of described rectifier is specially:
Detect and the size of the voltage on line side value of more described rectifier and the DC side intermediate voltage value of described rectifier, draw the conducting situation of diode in described rectifier;
According to the conducting situation of diode in described rectifier, detect the ac-side current value of described rectifier and the intermediate current value of described rectifier;
The ac-side current value of the described rectifier relatively detecting and the intermediate current value of described rectifier are determined the intermediate current relation of ac-side current and the described rectifier of described rectifier.
Preferably, the ac-side current of described rectifier and the intermediate current of described rectifier close and are:
Work as U
s>U
dctime, i
dc=| i
ac|;
When-U
s>U
dctime, i
dc=| i
ac|;
When | U
s|≤U
dctime, i
dc=0;
Wherein, U
sfor the voltage on line side of rectifier; U
dcfor the DC side intermediate voltage of rectifier; i
acfor the ac-side current of rectifier, i
dcfor the intermediate current of rectifier.
Can find out from above-mentioned technical scheme, the modeling method of rectifier disclosed by the invention, first by judging whether there is pwm control signal input in the input side of rectifier, rectifier is divided into and has pwm control signal input and input two kinds of situations without pwm control signal, in the time having pwm control signal input, can be according to the sense of current of input current in the pattern of pwm control signal of rectifier the first brachium pontis and the second brachium pontis and the input side of rectifier, judge the conducting situation of rectifier bridge arm, and summarize according to the conducting situation of brachium pontis, the first brachium pontis of rectifier, the second brachium pontis input point is with respect to the relation of the output potential of mid point, the upper brachium pontis electric current of rectifier the first brachium pontis, the relation of the upper brachium pontis electric current of the second brachium pontis and the upper brachium pontis electric current of rectifier and the lower brachium pontis electric current of rectifier the first brachium pontis, the relation of the lower brachium pontis electric current of the second brachium pontis and the lower brachium pontis electric current of described rectifier, in the time there is no pwm control signal input, by comparing the size of the voltage on line side of rectifier and the DC side intermediate voltage of rectifier, draw the conducting situation of diode in rectifier, and summarize according to the conducting situation of diode in rectifier: the relation of relation, the ac-side current of rectifier and the intermediate current of rectifier of the AC voltage of rectifier and the DC side intermediate voltage of described rectifier.In the generalization procedure of the voltage and current of above-mentioned rectifier all without carrying out complex calculations, only need according to the conducting situation of components and parts in different situations judge rectifier, just can conveniently summarize the relation between relation and the electric current between rectifier voltage.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the circuit diagram of single-phase bridge three level rectifiers disclosed by the invention;
Fig. 2 is the modeling method flow chart of disclosed a kind of single-phase bridge three level rectifiers of the embodiment of the present invention;
Fig. 3 is single-phase bridge three level rectifier the first brachium pontis main circuit diagrams disclosed by the invention;
Fig. 4 is the equivalent-simplification circuit diagram that single-phase bridge three level rectifiers disclosed by the invention are not controlled rectification.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the invention discloses a kind of modeling method of single-phase bridge three level rectifiers, simple with performing step, amount of calculation is little and conveniently single-phase bridge three level rectifiers are carried out to modeling.
Before the modeling method of single-phase bridge three level rectifiers disclosed by the invention is described, paper single-phase bridge three level rectifiers disclosed by the invention, as shown in Figure 1:
Single-phase bridge three level rectifier main circuits are often made up of 8 full control switching devices, are divided into two brachium pontis, adopt neutral point clamp type structure.Wherein V11～V42 is main switch, and VD11～VD42 is antiparallel fly-wheel diode, and D1～D4 is clamping diode.
Wherein, V11, V12, V21, V22 main switch and fly-wheel diode VD11, VD12, VD21, VD22 and clamping diode D1, D2 composition single-phase bridge three level rectifier the first brachium pontis, also can be described as U brachium pontis, wherein V11, V12 main switch and and fly-wheel diode VD11, VD12 and clamping diode D1 form the upper brachium pontis of the first brachium pontis; Remaining switching device forms the lower brachium pontis of the first brachium pontis.
Wherein, V31, V32, V41, V42 main switch and fly-wheel diode VD31, VD32, VD41, VD42 and clamping diode D3, D4 composition single-phase bridge three level rectifier the second brachium pontis, also can be described as V brachium pontis, wherein V31, V32 main switch and and fly-wheel diode VD31, VD32 and clamping diode D3 form the upper brachium pontis of the second brachium pontis, remaining switching device forms the lower brachium pontis of the second brachium pontis.
Wherein, A point is the first brachium pontis (U brachium pontis) electric current input point, and B point is the second brachium pontis (V brachium pontis) electric current input point, and O point is brachium pontis intermediate potential datum mark.
The modeling method of disclosed a kind of single-phase bridge three level rectifiers of the embodiment of the present invention, as shown in Figure 2, comprising:
S101, judge in the input side of rectifier, whether there is pwm control signal input; Enter step if having
S102, according to the sense of current of input current in the pattern of pwm control signal of rectifier the first brachium pontis and the second brachium pontis and the input side of rectifier, draw the conducting situation of described rectifier bridge arm, and according to the conducting situation of described brachium pontis summarize the first brachium pontis input point of rectifier with respect to the output potential of mid point, the second brachium pontis input point the relation with respect to the output potential of mid point and the AC voltage of rectifier output; The relation of the upper brachium pontis electric current of the upper brachium pontis electric current of the first brachium pontis of rectifier, the upper brachium pontis electric current of the second brachium pontis and rectifier; The relation of the lower brachium pontis electric current of the lower brachium pontis electric current of the first brachium pontis of rectifier, the lower brachium pontis electric current of the second brachium pontis and rectifier; Otherwise enter step
The size of the DC side intermediate voltage of the voltage on line side of S103, comparison rectifier and described rectifier, draw the conducting situation of diode in rectifier, and summarize according to the conducting situation of diode in rectifier: the relation of the AC voltage of rectifier and the DC side intermediate voltage of rectifier; The relation of the ac-side current of rectifier and the intermediate current of rectifier.
Concrete, the pattern of the pwm control signal of rectifier the first brachium pontis is " height is low ", " low height is low ", " low high height ", " low height " or " low height is high ".
Concrete, in the input side of rectifier, the sense of current of input current is for being more than or equal to zero direction or being less than zero direction.
Concrete, in step S102:
Concluding the first brachium pontis input point of rectifier is specially with respect to the relation of the output potential of mid point and the AC voltage of rectifier output with respect to the output potential of mid point, the second brachium pontis input point:
According to the sense of current of input current in the input side of the different pwm control signal of input and described rectifier, draw the conducting situation of described rectifier the first brachium pontis and the second brachium pontis;
According to the conducting situation of described rectifier the first brachium pontis and the second brachium pontis, the first brachium pontis input point that detects the AC magnitude of voltage of described rectifier output, described rectifier is the output potential value with respect to mid point with respect to the output potential value of mid point and the second brachium pontis input point;
The AC magnitude of voltage of the described rectifier output relatively detecting, the first brachium pontis input point of described rectifier are determined the AC voltage of described rectifier output, described rectifier with respect to the output potential value of mid point the first brachium pontis input point with respect to the output potential value of mid point and the second brachium pontis input point is the relation with respect to the output potential of mid point with respect to the output potential of mid point and the second brachium pontis input point.
The AC voltage of rectifier output, the first brachium pontis input point of described rectifier with respect to output potential and the second brachium pontis input point of mid point with respect to the pass of the output potential of mid point are:
U
ac=U
U-U
V；
Wherein, U
acfor the AC voltage of rectifier output; U
uthe first brachium pontis input point is with respect to the output potential of mid point; U
vthe first brachium pontis input point is with respect to the output potential of mid point.
The relation of concluding upper brachium pontis electric current, the upper brachium pontis electric current of the second brachium pontis and the upper brachium pontis electric current of described rectifier of the first brachium pontis of described rectifier is specially:
According to the sense of current of input current in the input side of the different pwm control signal of input and described rectifier, draw the conducting situation of brachium pontis on described rectifier the first brachium pontis and the second brachium pontis;
According to the conducting situation of brachium pontis on described rectifier the first brachium pontis and the second brachium pontis, detect upper brachium pontis current value, the upper brachium pontis current value of the second brachium pontis and the upper brachium pontis current value of described rectifier of described rectifier the first brachium pontis;
The upper brachium pontis current value of the upper brachium pontis current value of described rectifier the first brachium pontis relatively detecting, the upper brachium pontis current value of the second brachium pontis and described rectifier is determined the relation of upper brachium pontis electric current, the upper brachium pontis electric current of the second brachium pontis and the upper brachium pontis electric current of described rectifier of the first brachium pontis of described rectifier.
The pass of upper brachium pontis electric current, the upper brachium pontis electric current of the second brachium pontis and the upper brachium pontis electric current of described rectifier of the first brachium pontis of rectifier is:
i
dcu=i
uU+i
uV；
Wherein, i
dcufor the upper brachium pontis electric current of rectifier; i
uUit is brachium pontis electric current on the first brachium pontis; i
uVit is brachium pontis electric current on the second brachium pontis.
The relation of concluding lower brachium pontis electric current, the lower brachium pontis electric current of the second brachium pontis and the lower brachium pontis electric current of described rectifier of the first brachium pontis of described rectifier is specially:
According to the sense of current of input current in the input side of the different pwm control signal of input and described rectifier, draw the conducting situation of brachium pontis under described rectifier the first brachium pontis and the second brachium pontis;
According to the conducting situation of brachium pontis under described rectifier the first brachium pontis and the second brachium pontis, detect lower brachium pontis current value, the lower brachium pontis current value of the second brachium pontis and the lower brachium pontis current value of described rectifier of described rectifier the first brachium pontis;
The lower brachium pontis current value of the lower brachium pontis current value of described rectifier the first brachium pontis relatively detecting, the lower brachium pontis current value of the second brachium pontis and described rectifier is determined the relation of lower brachium pontis electric current, the lower brachium pontis electric current of the second brachium pontis and the lower brachium pontis electric current of described rectifier of the first brachium pontis of described rectifier.
The pass of lower brachium pontis electric current, the lower brachium pontis electric current of the second brachium pontis and the lower brachium pontis electric current of described rectifier of the first brachium pontis of rectifier is:
i
dcd=i
dU+i
dV；
Wherein, i
dcdfor the lower brachium pontis electric current of rectifier; i
dUit is brachium pontis electric current under the first brachium pontis; i
dVit is brachium pontis electric current under the second brachium pontis.
Concrete, in step S103:
The relation of concluding the AC voltage of described rectifier and the DC side intermediate voltage of described rectifier is specially:
Detect and the size of the voltage on line side value of more described rectifier and the DC side intermediate voltage value of described rectifier, draw the conducting situation of diode in described rectifier; According to the conducting situation of diode in described rectifier, detect the AC magnitude of voltage of described rectifier;
The DC side intermediate voltage value of the voltage on line side value of the described rectifier relatively detecting, described rectifier and the AC magnitude of voltage of described rectifier are determined the DC side intermediate voltage of the voltage on line side of described rectifier, described rectifier and the AC voltage relationship of described rectifier.
The AC magnitude of voltage of rectifier determines that the DC side intermediate voltage of the voltage on line side of described rectifier, described rectifier and the AC voltage relationship of described rectifier are:
Work as U
s>U
dctime, U
ac=U
dc;
When-U
s>U
dctime, U
ac=-U
dc;
When | U
s|≤U
dctime, U
ac=U
s;
Wherein, U
sfor the voltage on line side of rectifier; U
acfor the AC voltage of rectifier; U
dcfor the DC side intermediate voltage of rectifier.
The relation of concluding the ac-side current of described rectifier and the intermediate current of described rectifier is specially:
Detect and the size of the voltage on line side value of more described rectifier and the DC side intermediate voltage value of described rectifier, draw the conducting situation of diode in described rectifier;
According to the conducting situation of diode in described rectifier, detect the ac-side current value of described rectifier and the intermediate current value of described rectifier;
The ac-side current value of the described rectifier relatively detecting and the intermediate current value of described rectifier are determined the intermediate current relation of ac-side current and the described rectifier of described rectifier.
The ac-side current of described rectifier and the intermediate current of described rectifier close:
Work as U
s>U
dctime, i
dc=| i
ac|;
When-U
s>U
dctime, i
dc=| i
ac|;
When | U
s|≤U
dctime, i
dc=0;
Wherein, U
sfor the voltage on line side of rectifier; U
dcfor the DC side intermediate voltage of rectifier; i
acfor the ac-side current of rectifier, i
dcfor the intermediate current of rectifier.
In order to make above-described embodiment more cheer and bright, below respectively to the first brachium pontis of rectifier in the time there is pwm control signal and rectifier analyze during without pwm control signal.Because the analytic process of the second brachium pontis is identical with the analytic process of the first brachium pontis, do not repeat them here.
When the first brachium pontis of flat rectifier is in the time existing pwm control signal, as shown in Figure 3, the single brachium pontis of rectifier is normally worked and is considered dead band situation, co-exist in 5 kinds of pwm control signal patterns, that is: 1100(V11, V12 trigger impulse are high level, and V21, V22 trigger impulse are low level, below the rest may be inferred), 0100,0110,0010,0011, according to the first brachium pontis AC input current direction of rectifier, entirety can be summarized three kinds of switching tube conduction modes again.Labor result is as shown in table 1.
Rectifier the first brachium pontis conducting situation under the different pwm control signal pattern of table 1
In table, i
infor the first brachium pontis input current of rectifier.
Conclude above rectifier the first brachium pontis conducting situation, can be divided into 3 kinds of conduction modes.Draw the first brachium pontis AC output potential, the first brachium pontis half brachium pontis output current up and down according to conduction mode.As shown in table 2 below.
The output voltage electric current of rectifier the first brachium pontis under the different conduction mode of table 2
| mode | U | i u | i d | Remarks |
| 1 | U dc1 | i in | 0 | Upper brachium pontis conducting |
| 2 | 0 | 0 | 0 | Neutral point clamp |
| 3 | -U dc2 | 0 | i in | Lower brachium pontis conducting |
Wherein, U is the output potential of brachium pontis input point in respect to mid point o;
I
uwith i
dfor upper and lower half brachium pontis electric current;
U
dcfor intermediate voltage, U
dc1with U
dc2for upper and lower half voltage.
Obtain after conclusions, the first brachium pontis to rectifier and the second brachium pontis (U and V) can merge modeling, finally can draw the AC voltage U of rectifier model output
acwith DC side upper and lower bridge arm current value i
dcuand i
dcd.
U
ac=U
U-U
V
i
dcu=i
uU+i
uV
i
dcd=i
dU+i
dV
Wherein: U
u, U
vbe the output potential of the first brachium pontis and the second brachium pontis (U and V) input point in respect to mid point o; i
uUwith i
dUbe respectively the first brachium pontis (U brachium pontis) upper and lower bridge arm electric current, i
uVwith i
dVbe respectively the second brachium pontis (V brachium pontis) upper and lower bridge arm electric current.
When rectifier is during without pwm control signal, as shown in Figure 4, rectifier is not in controlling rectification working condition.Rectifier only VD11～VD42 fly-wheel diode carries out work, therefore can ignore switching tube and clamping diode carries out equivalence to circuit.Wherein, U
sfor voltage on line side.U
acfor rectifier AC voltage, U
dcfor intermediate voltage.R, L are net side equivalent resistance, inductance.I
acfor rectifier ac-side current, i
dcfor intermediate current.
Time be overall work owing to not controlling rectification work, thus need be to its global analysis, inseparable brachium pontis modeling.Different in the situation that, brachium pontis conducting situation is as shown in table 3.
The conducting situation of rectifier bridge arm under table 3 different situations
Agreement rectifier cell conducting or will conducting time, status=1; In the time that rectifier cell cut-off maybe will end, status=0.
Conclude the on state characteristic of not controlling rectification, visible, when without pwm pulse control signal, if single-phase bridge three level rectifiers also meet | U
s|>=U
dcor ac-side current i
acone of two conditions of non-zero, just will be in not controlling rectification conducting state, i.e. status=1; Otherwise, status=0.
According to i
ac, U
sanalyze and do not control single-phase bridge three level rectifier output AC side voltage and DC side current values in rectification situation, as shown in table 4.
Output voltage current value when table 4 is not controlled rectification
Finally, also it should be noted that, in this article, relational terms such as the first and second grades is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply and between these entities or operation, have the relation of any this reality or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby the process, method, article or the equipment that make to comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or be also included as the intrinsic key element of this process, method, article or equipment.The in the situation that of more restrictions not, the key element being limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment, between each embodiment identical similar part mutually referring to.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiment, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (1)
1. a modeling method for single-phase bridge three level rectifiers, is characterized in that, comprising:
Judge and in the input side of rectifier, whether have pwm control signal input;
If have, according to the sense of current of input current in the pattern of pwm control signal of described rectifier the first brachium pontis and the second brachium pontis and the input side of described rectifier, draw the conducting situation of described rectifier bridge arm, and summarize according to the conducting situation of described brachium pontis:
The first brachium pontis input point of described rectifier is the relation with respect to the output potential of mid point and the AC voltage of described rectifier output with respect to the output potential of mid point, the second brachium pontis input point;
The relation of upper brachium pontis electric current, the upper brachium pontis electric current of the second brachium pontis and the upper brachium pontis electric current of described rectifier of the first brachium pontis of described rectifier;
The relation of lower brachium pontis electric current, the lower brachium pontis electric current of the second brachium pontis and the lower brachium pontis electric current of described rectifier of the first brachium pontis of described rectifier;
Otherwise the size of the DC side intermediate voltage of the voltage on line side of more described rectifier and described rectifier, draws the conducting situation of diode in described rectifier, and summarizes according to the conducting situation of diode in described rectifier:
The relation of the AC voltage of described rectifier and the DC side intermediate voltage of described rectifier;
The relation of the ac-side current of described rectifier and the intermediate current of described rectifier;
The pattern of the pwm control signal of described rectifier is " height is low ", " low height is low ", " low high height ", " low height " or " low height is high ";
In the input side of described rectifier, the sense of current of input current is for being more than or equal to zero direction or being less than zero direction;
The first brachium pontis input point of the described rectifier of described conclusion is specially with respect to the relation of the output potential of mid point and the AC voltage of described rectifier output with respect to output potential, the second brachium pontis input point of mid point:
According to the sense of current of input current in the input side of the different pwm control signal of input and described rectifier, draw the conducting situation of described rectifier the first brachium pontis and the second brachium pontis;
According to the conducting situation of described rectifier the first brachium pontis and the second brachium pontis, the first brachium pontis input point that detects the AC magnitude of voltage of described rectifier output, described rectifier is the output potential value with respect to mid point with respect to the output potential value of mid point and the second brachium pontis input point;
The AC magnitude of voltage of the described rectifier output relatively detecting, the first brachium pontis input point of described rectifier are determined the AC voltage of described rectifier output, described rectifier with respect to the output potential value of mid point the first brachium pontis input point with respect to the output potential value of mid point and the second brachium pontis input point is the relation with respect to the output potential of mid point with respect to the output potential of mid point and the second brachium pontis input point;
The first brachium pontis input point of described rectifier with respect to output potential, the second brachium pontis input point of mid point with respect to the pass of the output potential of mid point and the AC voltage of described rectifier output is:
U
ac＝U
U-U
V；
Wherein, U
acfor the AC voltage of rectifier output; U
uthe first brachium pontis input point is with respect to the output potential of mid point; U
vthe first brachium pontis input point is with respect to the output potential of mid point;
The relation of concluding upper brachium pontis electric current, the upper brachium pontis electric current of the second brachium pontis and the upper brachium pontis electric current of described rectifier of the first brachium pontis of described rectifier is specially:
According to the sense of current of input current in the input side of the different pwm control signal of input and described rectifier, draw the conducting situation of brachium pontis on described rectifier the first brachium pontis and the second brachium pontis;
According to the conducting situation of brachium pontis on described rectifier the first brachium pontis and the second brachium pontis, detect upper brachium pontis current value, the upper brachium pontis current value of the second brachium pontis and the upper brachium pontis current value of described rectifier of described rectifier the first brachium pontis;
The upper brachium pontis current value of the upper brachium pontis current value of described rectifier the first brachium pontis relatively detecting, the upper brachium pontis current value of the second brachium pontis and described rectifier is determined the relation of upper brachium pontis electric current, the upper brachium pontis electric current of the second brachium pontis and the upper brachium pontis electric current of described rectifier of the first brachium pontis of described rectifier;
The pass of upper brachium pontis electric current, the upper brachium pontis electric current of the second brachium pontis and the upper brachium pontis electric current of described rectifier of the first brachium pontis of described rectifier is:
i
dcu＝i
uU+i
uV；
Wherein, i
dcufor the upper brachium pontis electric current of rectifier; i
uUit is brachium pontis electric current on the first brachium pontis; i
uVit is brachium pontis electric current on the second brachium pontis;
The relation of concluding lower brachium pontis electric current, the lower brachium pontis electric current of the second brachium pontis and the lower brachium pontis electric current of described rectifier of the first brachium pontis of described rectifier is specially:
According to the sense of current of input current in the input side of the different pwm control signal of input and described rectifier, draw the conducting situation of brachium pontis under described rectifier the first brachium pontis and the second brachium pontis;
According to the conducting situation of brachium pontis under described rectifier the first brachium pontis and the second brachium pontis, detect lower brachium pontis current value, the lower brachium pontis current value of the second brachium pontis and the lower brachium pontis current value of described rectifier of described rectifier the first brachium pontis;
The lower brachium pontis current value of the lower brachium pontis current value of described rectifier the first brachium pontis relatively detecting, the lower brachium pontis current value of the second brachium pontis and described rectifier is determined the relation of lower brachium pontis electric current, the lower brachium pontis electric current of the second brachium pontis and the lower brachium pontis electric current of described rectifier of the first brachium pontis of described rectifier;
The pass of lower brachium pontis electric current, the lower brachium pontis electric current of the second brachium pontis and the lower brachium pontis electric current of described rectifier of the first brachium pontis of described rectifier is:
i
dcd＝i
dU+i
dV；
Wherein, i
dcdfor the lower brachium pontis electric current of rectifier; i
dUit is brachium pontis electric current under the first brachium pontis; i
dVit is brachium pontis electric current under the second brachium pontis;
The relation of concluding the AC voltage of described rectifier and the DC side intermediate voltage of described rectifier is specially:
Detect and the size of the voltage on line side value of more described rectifier and the DC side intermediate voltage value of described rectifier, draw the conducting situation of diode in described rectifier; According to the conducting situation of diode in described rectifier, detect the AC magnitude of voltage of described rectifier;
The DC side intermediate voltage value of the voltage on line side value of the described rectifier relatively detecting, described rectifier and the AC magnitude of voltage of described rectifier are determined the DC side intermediate voltage of the voltage on line side of described rectifier, described rectifier and the AC voltage relationship of described rectifier;
The AC magnitude of voltage of rectifier determines that the DC side intermediate voltage of the voltage on line side of described rectifier, described rectifier and the AC voltage relationship of described rectifier are:
Work as U
s> U
dctime, U
ac=U
dc;
When-U
s> U
dctime, U
ac=-U
dc;
When | U
s|≤U
dctime, U
ac=U
s;
Wherein, U
sfor the voltage on line side of rectifier; U
acfor the AC voltage of rectifier; U
dcfor the DC side intermediate voltage of rectifier;
The relation of concluding the ac-side current of described rectifier and the intermediate current of described rectifier is specially:
Detect and the size of the voltage on line side value of more described rectifier and the DC side intermediate voltage value of described rectifier, draw the conducting situation of diode in described rectifier;
According to the conducting situation of diode in described rectifier, detect the ac-side current value of described rectifier and the intermediate current value of described rectifier;
The ac-side current value of the described rectifier relatively detecting and the intermediate current value of described rectifier are determined the intermediate current relation of ac-side current and the described rectifier of described rectifier;
The ac-side current of described rectifier and the intermediate current of described rectifier close:
Work as U
s> U
dctime, i
dc=| i
ac|;
When-U
s> U
dctime, i
dc=| i
ac|;
When | U
s|≤U
dctime, i
dc=0;
Wherein, U
sfor the voltage on line side of rectifier; U
dcfor the DC side intermediate voltage of rectifier; i
acfor the ac-side current of rectifier, i
dcfor the intermediate current of rectifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210192685.5A CN102710153B (en) | 2012-06-12 | 2012-06-12 | Modeling method of single-phase bridge-type three-level rectifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210192685.5A CN102710153B (en) | 2012-06-12 | 2012-06-12 | Modeling method of single-phase bridge-type three-level rectifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102710153A CN102710153A (en) | 2012-10-03 |
| CN102710153B true CN102710153B (en) | 2014-11-19 |
Family
ID=46902755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210192685.5A Active CN102710153B (en) | 2012-06-12 | 2012-06-12 | Modeling method of single-phase bridge-type three-level rectifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102710153B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9960608B2 (en) | 2016-03-04 | 2018-05-01 | Qualcomm Incorporated | High frequency multi-level rectification |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105718703B (en) * | 2016-03-10 | 2019-01-18 | 盐城工学院 | A kind of modeling method of three-level converter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1829061A (en) * | 2005-03-01 | 2006-09-06 | 广东明阳龙源电力电子有限公司 | Three level inverter control system and method |
| CN101018020A (en) * | 2007-01-05 | 2007-08-15 | 清华大学 | A mixed modulating method for three level high-voltage transducer |
| EP2226926A1 (en) * | 2009-03-02 | 2010-09-08 | ABB Research Ltd. | Five-level inverter |
| CN102111083A (en) * | 2011-03-17 | 2011-06-29 | 株洲南车时代电气股份有限公司 | Dead-time effect simulation modeling device of three-level inverter and method thereof |
-
2012
- 2012-06-12 CN CN201210192685.5A patent/CN102710153B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1829061A (en) * | 2005-03-01 | 2006-09-06 | 广东明阳龙源电力电子有限公司 | Three level inverter control system and method |
| CN101018020A (en) * | 2007-01-05 | 2007-08-15 | 清华大学 | A mixed modulating method for three level high-voltage transducer |
| EP2226926A1 (en) * | 2009-03-02 | 2010-09-08 | ABB Research Ltd. | Five-level inverter |
| CN102111083A (en) * | 2011-03-17 | 2011-06-29 | 株洲南车时代电气股份有限公司 | Dead-time effect simulation modeling device of three-level inverter and method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 单相三电平整流器建模及MATLAB仿真实现;潘燕;《变流技术与电力牵引》;20070228;11-15 * |
| 潘燕.单相三电平整流器建模及MATLAB仿真实现.《变流技术与电力牵引》.2007, * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9960608B2 (en) | 2016-03-04 | 2018-05-01 | Qualcomm Incorporated | High frequency multi-level rectification |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102710153A (en) | 2012-10-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105099200B (en) | The double active bridge DC converter exchange phasor analysis of phase shifting control and modeling method | |
| CN101944839B (en) | Single-phase five-level power inverter | |
| CN103354427B (en) | Single-phase inverter and three-phase inverter | |
| CN103296905B (en) | The self-adaptation control method of three-phase voltage type power factor correcting converter | |
| CN103346668B (en) | Control system for restraining high-frequency electromagnetic interference at output end of indirect matrix converter | |
| CN107800309A (en) | A kind of single-stage isolated type Three-phase PFC and its control method | |
| CN103916040A (en) | Inverter topological circuit, inverting method and inverter | |
| CN101860244B (en) | Half-period control method of single-phase diode-clamped five-level half-bridge inverter | |
| CN102684472A (en) | Three-phase power factor correction circuit device | |
| CN102710153B (en) | Modeling method of single-phase bridge-type three-level rectifier | |
| CN105140950A (en) | Power electronic transformer based on virtual grid flux orientation | |
| CN203827192U (en) | Three-phase nine-switch group MMC AC-AC converter | |
| CN104038076A (en) | Three-phase nine-switch-group MMC AC/AC converter and method for controlling the same | |
| CN107517018A (en) | Suitable for the PWM method of three-level inverter | |
| CN104601002B (en) | A kind of sparse formula dual stage matrix converter topological structure | |
| CN104953590B (en) | Based on the harmonic analysis method of the THE UPFC of MMC topological structure | |
| Satish et al. | Design and implementation of single phase matrix converter for cycloconverter operation | |
| CN205081692U (en) | Constant current source type electromagnetic emitting device | |
| CN103762881A (en) | Double-output single-phase three-switch-block MMC inverter and control method thereof | |
| CN203827206U (en) | Nine-switch-group MMC hybrid converter | |
| CN103956921B (en) | Six switches set MMC mixing transformation device and control methods thereof | |
| CN113708398A (en) | Multi-terminal variable-ratio adjustable direct-current transformer for power distribution network and control method thereof | |
| CN103956918B (en) | Nine switches set MMC mixing transformation device and control methods thereof | |
| CN205304616U (en) | Take electric current source converter of current compensation | |
| CN204304820U (en) | A kind of three-phase AC/DC conversion device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |