CN103269153B - A kind of Three-Phase PWM Rectifier transient current overshoots suppressing method - Google Patents
A kind of Three-Phase PWM Rectifier transient current overshoots suppressing method Download PDFInfo
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Abstract
The invention provides a kind of 1. Three-Phase PWM Rectifier transient current overshoot suppressing methods, comprise the following steps：Step one：According to PWM rectifier net side three-phase current flow direction, 6 intervals are divided into, i.e., I is interval：i a>0,i b<0、i c>0、II is interval：i a>0,ib<0、i c<0th, III is interval：i a>0,i b>0、i c<0th, IV is interval：i a<0,i b>0、i c<0th, V is interval：i a<0,i b>0、i c>0 and VI interval：i a<0,i b<0、i c>0；Step 2：More prescribed a time limit when detecting electric current, according to the current interval present in three-phase current, the on off operating mode of selecting switch device forces overshoot current to suppress in allowed band.
Description
Technical field
This inventive technique belongs to Three-Phase PWM Rectifier current control field, is mainly used to solve Three-Phase PWM Rectifier electricity
Transient current overshooting problem in flow control process, such as rectification control startup stage current over pulse problem.
Background technology
In PWM rectifier system control strategy, current on line side control is the key technology for determining rectifier performance.Mesh
Before, VSR Current Control Technologies are broadly divided into two major classes, i.e. current indirect control and Direct Current Control.Wherein, Direct Current control
System is due to using Closed-loop Control Strategy, with faster response speed and stronger control robustness, as particularly to system
The Main Means that dynamic performance requirements high field is closed, such as two close cycles current control, STATE FEEDBACK CONTROL, track with zero error and stagnant ring
Current control etc., and be wherein most widely used with two close cycles current control.
However, being found in practical engineering application, in PWM current flow control process, particularly in control starting stage, electric current
Larger overshoot phenomenon occurs.Cause current over pulse to there is many-sided reason, such as system inductance, electric capacity energy-storage travelling wave tube with
The resonance that on off state changes and produced；For another example, cause when system uses PI closed loop controllers because PI parameter configurations are improper
System overshoot.For the former, due to relevant with power system capacity and component parameters selection, be not easy to do too big change；And for
The latter, by suitably adjusting PI controller associated control parameters, can alleviate above-mentioned current over pulse phenomenon to a certain extent, but together
When can also influence other Control performance standards of system, and this method does not have obvious effect to suppressing current over pulse.
It there are no the prior art that control is overshooted for Three-Phase PWM Rectifier transient current.
The content of the invention
A kind of Three-Phase PWM Rectifier transient current overshoot suppressing method of the present invention, without complicated control algolithm, when
Detect three-phase current presence more to prescribe a time limit, it is only necessary to judge the interval according to certain regular partition residing for current three-phase current,
The state that respectively switches on-off is can determine that, suppresses current over pulse in real time.This method is realized simple, it is easy to Project Realization.
Present invention employs following technical scheme：
A kind of Three-Phase PWM Rectifier transient current overshoots suppressing method, comprises the following steps：
Step one：According to PWM rectifier net side three-phase current flow direction, 6 intervals are divided into, i.e., I is interval：ia
>0, ib<0、ic>0th, II is interval：ia>0, ib<0、ic<0th, III is interval：ia>0, ib>0、ic<0th, IV is interval：ia <0, ib>0、ic
<0th, V is interval：ia <0, ib>0、ic>0 and VI interval：ia <0, ib<0、ic>0；
Step 2：More prescribed a time limit when detecting electric current, according to the current interval present in three-phase current, selecting switch device
On off operating mode, overshoot current is forced to suppress in allowed band：
（a）When three-phase current has correspondence ia>0, ib<0、ic>When the I of 0 is interval, on off state is set as：T1=1、T3=
0th, T5=1, and T2, T4, T6 on off state are respectively with T1, T3, T5 on the contrary, similarly hereinafter；
（b）When three-phase current has correspondence ia>0, ib<0、ic<When the II of 0 is interval, on off state is set as：T1=1、T3=
0、T5=0；
（c）When three-phase current has correspondence ia>0, ib>0、ic<When the III of 0 is interval, on off state is set as：T1=1、T3=
1、T5=0；
（d）When three-phase current has correspondence ia<0, ib>0、ic<When the IV of 0 is interval, on off state is set as：T1=0、T3=
1、T5=0；
（e）When three-phase current has correspondence ia<0, ib>0、ic>When the V of 0 is interval, on off state is set as：T1=0、T3=
1、T5=1；
（f）When three-phase current has correspondence ia<0, ib<0、ic>When the VI of 0 is interval, on off state is set as：T1=0、T3=
0、T5=1；
Brief description of the drawings
Fig. 1 is Three-Phase PWM Rectifier equivalent-circuit model.
Fig. 2 is Unity Power Factor PWM Rectifier three-phase current interval division method.
Fig. 3 is that Unity Power Factor PWM Rectifier exists | ia |>Each interval current over pulse suppresses principle during Imax.
Embodiment
A kind of Three-Phase PWM Rectifier transient current overshoot suppressing method of the present invention, according to PWM rectifier net side three-phase
Direction of current flow, is divided into some intervals, is more prescribed a time limit when detecting electric current, works as proparea according to present in three-phase current
Between, the on off operating mode of selecting switch device forces overshoot current to suppress in allowed band.
If current limit is Imax, it is positive direction to take current reference direction shown in Fig. 1.PWM rectifier with unit power because
Number（Unit Power Factor, UPF）Analysis method principle exemplified by rectification mode.
Can be according to being divided into 6 intervals, reference picture 2 in a cycle by three-phase current.
1st, with | ia |>Analyzed exemplified by Imax is out-of-limit different interval UPF rectifiers ac-side currents overshoot suppressing methods and
The on off operating mode of each switching device：
（1）I is interval：ia>0, ib<0、ic>0
Reference picture 3（a）：
First, in order to suppress ia, it should allow it to change round about, must now there is T1=1, T2=0；
Secondly as ib<0, for T3, T4, if T3=1, T4=0, ia can promote by T1, T3 formation loop 2.
Ia is set further to increase, therefore, it is necessary to there is T3=0, T4=1, now 1. ia forms loop by T1, electric capacity C and T4, forces
Ia is to changing inversely；
For switch T5, T6, because ic is equidirectional with ia, ia change is not influenceed, therefore, the two of T5, T5
Plant on off state all optional.In fact, T5, T5 on off state should consider ic situation, it is undetermined here.
（2）II is interval：ia>0, ib<0、ic<0
Reference picture 3（b）：
First, it is similarly I interval, due to ia>0, ib<0, allow it to change round about to suppress ia, it is necessary to have T1=
1, T2=0 and T3=0, T4=1, allow ia 1., to force ia to changing inversely by T1, electric capacity C and T4 formation loop, and avoid
The formation of loop 3.；
Secondly as ic<0, it is necessary to make T5=0, T6=1, allow ia 2., to force ia by T1, electric capacity C and T6 formation loop
To changing inversely；Otherwise, T5=1, T6=0, ia will be by T1 and T5 formation loop 4., and ia increases in the same direction.
（3）III is interval：ia>0, ib>0、ic<0
Reference picture 3（c）：
Due to ia>0, ibid, it is necessary to have T1=1, T2=0；
T5, T6 on off state are analyzed first, due to now ic<0, similarly I interval ib<0, symbol is with ia on the contrary, now
T5=0, T6=1, ia must be made 1., to force ia to changing inversely by T1, electric capacity C and T6 formation loop；
For T3, T4, due to ib>0, similarly I interval ic>0, symbol is identical with ia, and T3, T4 on off state are undetermined.
（4）IV is interval：ia <0, ib>0、ic<0
Reference picture 3（d）：
First, it is allowed to change round about in order to suppress ia, it is necessary to have T1=0, T2=1；
Secondly as ib>0, for T3, T4, it is necessary to there is T3=1, T4=0, now ia by T3, electric capacity C and
1. T2 formation loop, forces ia to changing inversely；
Finally, similarly I interval T5, T6, because ic directions are consistent with ia, switchs T5, T6 state undetermined.
（5）V is interval：ia <0, ib>0、ic>0
Reference picture 3（e）：
First, it is similarly IV interval, due to ia<0, it is necessary to have T1=0, T2=1；
And for switch T3, T4 and T5, T6, due to ib>0、ic>0, direction is with ia on the contrary, must have T3=1, T4=0
With T5=1, T6=0, allow ia to form loop 1. by T3, electric capacity C and T2, and pass through T5, electric capacity C and T2 formation loop
2., ia is forced to changing inversely.
（6）VI is interval：ia <0, ib<0、ic>0
Reference picture 3（f）：
Firstly, since ia<0, it is necessary to have T1=0, T2=1；
Secondly, and for switch T5, T6, due to ic>0, direction and ia allow ia to lead on the contrary, must have T5=1, T6=0
Cross T5, electric capacity C and T2 formation loop 1., force ia to changing inversely.
Finally, due to ib<0, direction is identical with ia, therefore switch T3, T4 state are undetermined.
2nd, by above in relation to | ia |>The analysis of the on off state interval to 6 can sum up following rule during Imax
Rule：(overshoot current is set as | ix |>Imax, x=a, b, c）
Rule 1：Work as ix>When 0, the on off state of its correspondence phase（Note：Here simple in order to describe, switch refers to upper bridge arm and opened
Close, bridge arm on off state is on the contrary, similarly hereinafter under correspondence phase）It is necessary for 1；On the contrary, working as ix<When 0, the on off state of correspondence phase is necessary for
0。
Rule 2：The determination method of other phase on off states is outside x phases：When the phase current direction is opposite with ix, it is opened
Off status must be opposite with x phases；When the phase current and ix are in the same direction, on off state is undetermined.
3rd, according to above-mentioned rule, can respectively provide and work as | ib |>Imax and | ic |>6 interval switches of correspondence during Imax
State, with reference to | ia |>On off state during Imax, is included in table 1 together（In table it is unlisted switch T2, T4, T6 state, respectively with
T1, T3, T5 are opposite）.
4th, analytical table 1, arranging any one interval to observation can find, 3 rows corresponding with the interval（|ix|>Imax, x=a, b,
c）In, in addition to switch undetermined, other on off states are consistent, below selective analysis switch undetermined state.
Still with the Ith interval 1st row | ia |>Exemplified by Imax.Reference picture 3（a）, before analysis shows, for ia control come
Say, the two state model for switching T5, T6 is all optional, select T5=1, T6=0, mainly to consider two aspects here：
First, 4. electric current ic charges by T5, electric capacity C and T4 formation loop to electric capacity in this condition, it can strengthen
Electric capacity charging rings speed；
Second, can be with the row of interval the 2nd | ib |>Imax and the 3rd row | ic |>Imax T5, T6 on off state is mutually unified.
Similarly, for the Ith interval 3rd row | ic |>For switch T1, T2 undetermined in Imax, T1=1, T2=0 is selected.
5th, in summary, for the Ith interval, when there is current over pulse, no matter phase residing for overshoot current, no matter also
Overshoot current number, on off state is consistent, i.e. T1=1, T3=0, T5=1.Similarly, other interval on off states undetermined all may be used
To be determined according to above-mentioned rule.So, when detecting current over pulse, it is only necessary to judge that electric current has current interval, you can really
The state of fixed each switch, as shown in table 2.
Table 1
The three-phase current of table 1 difference is out-of-limit, i.e., | ix |>Imax（x=a、b、c）When, each interval on off state, Imax is electricity
Restriction value.
The table 2 of table 2 be it is out-of-limit simply by the presence of electric current in three-phase current, i.e.,（|ia| | |ib| | |ic|）>During Imax, each area
Between on off state, Imax is current limit.
Table 2
。
Claims (1)
1. a kind of Three-Phase PWM Rectifier transient current overshoots suppressing method, comprise the following steps：
Step one：According to PWM rectifier net side three-phase current flow direction, 6 intervals are divided into, i.e., I is interval：i a>0,i b
<0、i c>0、II is interval：i a>0,i b<0、i c<0th, III is interval：i a>0,i b>0、i c<0th, IV is interval：i a<0,i b>0、i c<0th, Vth area
Between：i a<0,i b>0、i c>0 and VI interval：i a<0,i b<0、i c>0；
Step 2：More prescribed a time limit when detecting electric current, according to the current interval present in three-phase current, the break-make of selecting switch device
State, overshoot current is forced to suppress in allowed band, and wherein T1-T6 represents six of Three-Phase PWM Rectifier switches, T1 and
The upper and lower bridge arm switch of T2 correspondence a phases, the upper and lower bridge arm switch of T3 b phases corresponding with T4, the upper and lower bridge of T5 c phases corresponding with T6
Arm switch, " 1 " representation switch is open-minded, the shut-off of " 0 " representation switch；
（a）When three-phase current has correspondencei a>0,i b<0、i c>When the I of 0 is interval, on off state is set as：T 1=1、T 3=0、T 5=1,
AndT 2、T 4、T 6On off state respectively withT 1、T 3、T 5On the contrary, similarly hereinafter；
（b）When three-phase current has correspondencei a>0,i b<0、i c<When the II of 0 is interval, on off state is set as：T 1=1、T 3=0、T 5=
0；
（c）When three-phase current has correspondencei a>0,i b>0、i c<When the III of 0 is interval, on off state is set as：T 1=1、T 3=1、T 5=
0；
（d）When three-phase current has correspondencei a<0,i b>0、i c<When the IV of 0 is interval, on off state is set as：T 1=0、T 3=1、T 5=
0；
（e）When three-phase current has correspondencei a<0,i b>0、i c>When the V of 0 is interval, on off state is set as：T 1=0、T 3=1、T 5=
1；
（f）When three-phase current has correspondencei a<0,i b<0、i c>When the VI of 0 is interval, on off state is set as：T 1=0、T 3=0、T 5=
1。
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5198969A (en) * | 1990-07-13 | 1993-03-30 | Design Automation, Inc. | Soft-switching full-bridge dc/dc converting |
| US6023135A (en) * | 1998-05-18 | 2000-02-08 | Capstone Turbine Corporation | Turbogenerator/motor control system |
| CN101499771A (en) * | 2008-01-28 | 2009-08-05 | 王玉富 | Frequency-changing speed-regulating driver for energy feedback three phase motor with three phase electric power |
| CN101789600A (en) * | 2010-01-25 | 2010-07-28 | 苏州华辰电气有限公司 | Method for controlling dynamic direct voltage of parallel connection type active electric filter |
| CN102097959A (en) * | 2010-12-28 | 2011-06-15 | 易事特电力系统技术有限公司 | Space vector pulse width modulation method of three-phase three-level VIENNA type rectifier |
| CN102158065A (en) * | 2011-03-01 | 2011-08-17 | 徐州中矿大传动与自动化有限公司 | Method and device for controlling startup of PWM (pulse width modulation) rectifier without network side electrodynamic potential sensor |
| CN102255486A (en) * | 2011-06-30 | 2011-11-23 | 大连大工安道船舶技术有限责任公司 | Three-phase pulse width modulation (PWM) rectifier soft starting system |
-
2011
- 2011-12-31 CN CN201110458910.0A patent/CN103269153B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5198969A (en) * | 1990-07-13 | 1993-03-30 | Design Automation, Inc. | Soft-switching full-bridge dc/dc converting |
| US6023135A (en) * | 1998-05-18 | 2000-02-08 | Capstone Turbine Corporation | Turbogenerator/motor control system |
| CN101499771A (en) * | 2008-01-28 | 2009-08-05 | 王玉富 | Frequency-changing speed-regulating driver for energy feedback three phase motor with three phase electric power |
| CN101789600A (en) * | 2010-01-25 | 2010-07-28 | 苏州华辰电气有限公司 | Method for controlling dynamic direct voltage of parallel connection type active electric filter |
| CN102097959A (en) * | 2010-12-28 | 2011-06-15 | 易事特电力系统技术有限公司 | Space vector pulse width modulation method of three-phase three-level VIENNA type rectifier |
| CN102158065A (en) * | 2011-03-01 | 2011-08-17 | 徐州中矿大传动与自动化有限公司 | Method and device for controlling startup of PWM (pulse width modulation) rectifier without network side electrodynamic potential sensor |
| CN102255486A (en) * | 2011-06-30 | 2011-11-23 | 大连大工安道船舶技术有限责任公司 | Three-phase pulse width modulation (PWM) rectifier soft starting system |
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