CN103580517A - Method for operating power electronics circuit - Google Patents
Method for operating power electronics circuit Download PDFInfo
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- CN103580517A CN103580517A CN201210399173.6A CN201210399173A CN103580517A CN 103580517 A CN103580517 A CN 103580517A CN 201210399173 A CN201210399173 A CN 201210399173A CN 103580517 A CN103580517 A CN 103580517A
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- switch
- power
- state combination
- power systems
- switch state
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/49—Combination of the output voltage waveforms of a plurality of converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/4835—Converters with outputs that each can have more than two voltages levels comprising two or more cells, each including a switchable capacitor, the capacitors having a nominal charge voltage which corresponds to a given fraction of the input voltage, and the capacitors being selectively connected in series to determine the instantaneous output voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/487—Neutral point clamped inverters
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention provides a method for operating a power electronics circuit and relates to a method for operating a power electronics circuit, wherein the power electronics circuit has a plurality of switch cells having controllable power semiconductor switches for connection to phases of the power electronics circuit. The method comprises the following steps: detecting the functional state of at least two switch cells, generating switch state combinations from switch states of the power semiconductor switches of the switch cells, selecting a switch combination from the generated switch state combinations in dependence on the detection according to step (a), wherein the switch state combination to be selected substantially enables a predefinable control setpoint, wherein, if no selection of a switch state combination substantially enables the predefinable control setpoint, the predefinable control setpoint value is reduced by means of a predefinable proportionality factor or by means of a temporal function such that the selection of a switch state combination according to the reduced, predefinable control setpoint value from the remaining switch state combinations substantially enables the reduced predefinable control setpoint value, and actuating the power semiconductor switches of the switch cells according to the selected switch state combination for connection to the phases of the power electronics circuit.
Description
Technical field
The present invention relates to the operation method field of power electronic circuit, especially converter circuit.The present invention is based on a kind of according to the method for operate power electronic circuit of independent claims preamble.
Background technology
Nowadays power electronic circuit, especially converter circuit are used in a lot of application.The most important thing is, for switch (Schaltung) at least 3 switching voltage levels converter circuit, that is to say that nowadays multi-level converter circuit is significant.This converter circuit that comprises 3 switching voltage levels is exemplarily shown in Fig. 1.In addition, Fig. 3 exemplarily illustrates the Yi Gexiang branch of the converter circuit that comprises 5 switching voltage levels.In addition, in the phase branch of other known multi-level converter circuit shown in Fig. 5 and Fig. 6.Generally speaking, for switching the converter circuit 1 of at least 3 switching voltage levels, there are a plurality of switch elements 3 that comprise controllable power semiconductor switch, for connecting the phase u of power supply 2 and converter circuit 1, v, w.In addition, shown in Fig. 7, be implemented as the converter circuit of cascade (Kaskade), at US 5,986, described converter circuit be described in 909.Fig. 9 discloses a kind of power free STATCOM-converter circuit, and wherein STATCOM-converter circuit is at US 6,005,788 and US 5,642,275 in explanation.
For example, at US 5,986,909 and CN 1545199 A in explanation for moving for switching the method for the converter circuit of at least 3 switching voltage levels.For example, at US 5,986, open in 909: the in the situation that of switch element failure, the voltage level at the terminal place of the relevant phase of this converter circuit abandons automatically.Must in the method for operation of converter circuit, consider this situation, although so that switch element is out of order, be also the phase that symmetrical three-phase alternating current (Drehstrom) flows through converter circuit.This equates and require two serial connection (verketteten) phase voltages between phase necessary symmetrical.To this, US 5,986, and 909 suggestions, only so stride across (ueberbruecken) defective switch element and move asymmetrically converter circuit, and its mode makes present asymmetric converter circuit produce symmetrical phase voltage.To this, at US 5,986, explanation in 909 as at US 5,986, shown in Fig. 2 and Fig. 5 a, is regulating phase voltage aspect amplitude and phase shift in 909 in limited from now on modification scope, explicitly points out the zero offset of phase voltage in Fig. 2 and Fig. 5 a.At this, target is to maximize possible phase voltage.The computational methods of explanation for correcting a mistake in CN 1545199 A.
US 5,986,909 for moving the pretty troublesome and inaccuracy of the method for the converter circuit that comprises at least 3 switching voltage levels, this is because controlling phase voltage according to the malfunction of converter circuit aspect amplitude and homophase phase shift (Gleichtaktverschiebung).This requires to produce and correct application table, or alternatively, produces and correctly apply adjuster.Difficulty is, for every kind of possible failure condition is guaranteed suitable form or suitable adjusting.In addition, only for the failure condition of storing in form is guaranteed the correct response to the control of the power semiconductor switch of switch element, to produce desirable phase voltage.According to US 5,986, it is not optimum that 909 use adjusters substitute form, and is to be only similar to optimum control.In addition, the zero offset of phase voltage (Nullpunktverschiebung) is confined to completely specified process.At US 5,986, in 909, abandon in principle following possibility: from the Switch State Combination in Power Systems of a plurality of redundancies, use Switch State Combination in Power Systems optimum on that will define or preferential normal meaning.
Summary of the invention
Therefore, task of the present invention is, illustrate for operate power electronic circuit, in particular for switching the method for the converter circuit of (zur Schaltung) at least 3 switching voltage levels, by means of described method power electronic circuit, in the out of order situation of at least one switch element of power electronic circuit, can simply and limit and continue as few as possible operation.
This task solves by the feature of claim 1.The expansion scheme that the present invention is favourable is described in the dependent claims.
According to of the present invention for operate power electronic circuit, in particular for operation for switching the method for converter circuit of at least 3 switching voltage levels, power electronic circuit has a plurality of switch elements that comprise controllable power semiconductor switch, to connect phase and the power supply of power electronic circuit.The method according to this invention has following steps:
(a) detect the functional status of at least two switch elements;
(b) Switch State Combination in Power Systems of the on off state of the power semiconductor switch of generation switch element;
(c), according to according to the detection of step (a) selector switch combinations of states from produced Switch State Combination in Power Systems, wherein substantially realize can predefined adjusted value (Regelstellwert) for Switch State Combination in Power Systems to be selected, and
(d) according to the power semiconductor switch of selected Switch State Combination in Power Systems control switch unit, to connect phase and the power supply of power electronic circuit.
If out of order switch element for example detected in step (a), in step (c), the Switch State Combination in Power Systems from produced, advantageously consider so the fault of this functional status, switch element during selector switch combinations of states, wherein, then in step (d) according to the power semiconductor switch of selected Switch State Combination in Power Systems control switch unit, to connect phase and the power supply of power electronic circuit.Therefore can realize very simply the method according to this invention and the method according to this invention and allow advantageously almost unrestrictedly to continue operate power electronic circuit in the out of order situation of at least one switch element.Obviously, in step (a) in the situation that out of order switch element not detected, in step (c), the Switch State Combination in Power Systems from produced, also consider this functional status during selector switch combinations of states, that is to say that all switch elements trouble-freely work.Therefore, then, again in step (d) according to the power semiconductor switch of selected Switch State Combination in Power Systems control switch unit, to connect phase and the power supply of power electronic circuit.
As also possible that alternative, according to of the present invention for operate power electronic circuit, in particular for operation for connecting the method for converter circuit of at least 3 switching voltage levels, described power electronic circuit has a plurality of switch elements that comprise controllable power semiconductor switch, described switch element only for being connected of power electronic circuit, wherein, described method thereby there are following steps:
(e) detect the functional status of at least two switch elements;
(f) Switch State Combination in Power Systems of the on off state of the power semiconductor switch of generation switch element;
(g), according to according to the detection of step (a) selector switch combinations of states from produced Switch State Combination in Power Systems, wherein substantially realize can predefined adjusted value for Switch State Combination in Power Systems to be selected, and
(h) according to the power semiconductor switch of selected Switch State Combination in Power Systems control switch unit, to connect the phase of power electronic circuit (1).
In this alternative, the method according to this invention in the situation that for example, without previous mentioned power supply, applied power electronic circuit in STATCOM-converter circuit, wherein also draw the advantage of the method according to this invention of previously mentioning in described alternative.
Described task of the present invention and other task, advantage and feature from follow-up combination figure to open the detailed description of the favourable form of implementation of the present invention.
Accompanying drawing explanation
Fig. 1 illustrates power electronic circuit, especially comprises the form of implementation of the converter circuit of 3 switching voltage levels;
Fig. 2 illustrates the state diagram comprising according to the Switch State Combination in Power Systems of the phase of the converter circuit of Fig. 1;
Fig. 3 illustrates power electronic circuit, especially comprises the phase branch of the converter circuit of 5 switching voltage levels;
Fig. 4 illustrates the state diagram of Switch State Combination in Power Systems of the phase of the converter circuit that comprises 5 switching voltage levels;
Fig. 5 illustrates power electronic circuit, especially comprises the phase branch of the converter circuit of a plurality of switching voltage levels, and it is connected with DC power supply;
Fig. 6 illustrates power electronic circuit, especially comprises the phase branch of the converter circuit of a plurality of switching voltage levels, and it is connected with AC power;
Fig. 7 illustrates another form of implementation of converter circuit in power electronic circuit, especially cascade circuit;
Fig. 8 A illustrates the block diagram of the embodiment of the method according to this invention;
Fig. 8 B illustrates block diagram according to a further embodiment of the method according to the invention;
Fig. 9 illustrates another form of implementation of power electronic circuit, especially STATCOM converter circuit.
Applied in the drawings reference marker and its implication are concluded and are listed in list of reference signs.Substantially identical in the drawings part is marked with identical reference marker.Described form of implementation exemplarily represents subject matter and there is no restriction.
list of reference signs.
1 power electronic circuit
2 power supplys
3 switch elements
4 transformers
5 conditioning equipments.
Embodiment
As mentioned previously, power electronic circuit 1 shown in Figure 1, especially comprise the form of implementation of the converter circuit of 3 switching voltage levels.In addition, power electronic circuit 1 shown in Figure 3, especially comprise the phase branch of the converter circuit of 5 switching voltage levels.In addition, Fig. 5 illustrates power electronic circuit 1, especially comprises the phase branch of the converter circuit of a plurality of switching voltage levels, and wherein said phase branch is connected with DC power supply.In addition, power electronic circuit 1 shown in Figure 6, especially comprise the phase branch being connected with AC power of the converter circuit of a plurality of switching voltage levels.In addition another form of implementation of power electronic circuit 1 shown in Figure 7, the especially converter circuit in cascade circuit.In addition, in Fig. 9, be the STATCOM converter circuit of STATCOM converter circuit, especially non-transformer 2.Generally speaking, power electronic circuit 1 (this power electronic circuit 1 is in particular for switching the converter circuit of at least 3 switching voltage levels) has a plurality of switch elements 3 that comprise controllable power semiconductor switch, to connect phase u, v, w and the power supply 2 of power electronic circuit 1.To 3 of power electronic circuit 1 phase u, v, the explanation of w is only exemplary and does not represent to be confined to these phases u, v, w, that is to say, any amount of phase of power electronic circuit 1 is all possible.Likely, not only DC power supply but also AC power as power supply 2.Each power semiconductor switch controlled of switch element 3 is especially constituted as gate level turn-off thyristor (GTO-gate level turn-off thyristor) or comprises the integrated thyristor (IGCT-integrated gate commutated thyristor) of change of current control electrode, and described integrated thyristor comprises corresponding anti-paralleled diode.Yet it is also possible for example controllable power semiconductor switch being configured to the bipolar transistor (IGBT) that has the power MOSFET of extra antiparallel diode or be configured to the gate pole that comprises the apart arrangement with extra antiparallel diode.
Fig. 2 is comprising the phase u of power electronic circuit 1 shown in bidimensional alpha-beta plane, v, the state diagram of the Switch State Combination in Power Systems SK of w, described power electronic circuit 1 be constituted as according to Fig. 1 converter circuit.In state diagram, for according to Fig. 1 the possible Switch State Combination in Power Systems SK of on off state of the power semiconductor switch of switch element 3 being shown for switching the converter circuit of 3 switching voltage levels, wherein " 1 " represents corresponding phase u, v, and w is connected with some V+'s, " 1 " represents corresponding phase u, v, w is connected with some V-'s, and " 0 " represents corresponding phase u, v, w is connected with some NP's.In Fig. 2, there is following point, at these some places, represent a plurality of Switch State Combination in Power Systems SK.These so-called Redundanter schalter combinations of states SK produce respectively identical serial connection phase voltage u
uw, u
vu, u
wv.Fig. 4 is comprising the phase u of power electronic circuit 1 shown in alpha-beta plane, v, and the state diagram of the Switch State Combination in Power Systems SK of w, described power electronic circuit 1 is constituted as the converter circuit that comprises 5 switching voltage levels according to Fig. 3.In state diagram, for the Switch State Combination in Power Systems SK of on off state of the power semiconductor switch of switch element 3 is shown for the converter circuit that switches 5 switching voltage levels according to Fig. 3, wherein " 2 " represent phase u, v, w is connected with some 2V+'s, and " 1 " represents corresponding phase u, v, w is connected with some V+'s, and " 0 " represents corresponding phase u, v, w is connected with some NP's, and " 1 " represents corresponding phase u, v, w is connected with some V-'s, and " 2 " represent corresponding phase u, v, w is connected with some 2V-'s.According to the state diagram of Fig. 4, the Redundanter schalter combinations of states SK according to Fig. 2 is shown equally.For example be noted that for switching 7,9, the state diagram of the Switch State Combination in Power Systems SK of the converter circuit 1 of the switching voltage level of 11 etc. quantity is represented as different.
According to of the present invention for operate power electronic circuit 1, there are following steps in particular for operation for switching the method for converter circuit of at least 3 switching voltage levels:
(a) detect the functional status of at least two switch elements 3;
(b) the Switch State Combination in Power Systems SK of the on off state of the power semiconductor switch of generation switch element 3;
(c) basis is according to the detection of step (a) selector switch combinations of states SK from produced Switch State Combination in Power Systems (SK)
a, Switch State Combination in Power Systems SK to be selected wherein
asubstantially realizing can predefined adjusted value, and
(d) according to selected Switch State Combination in Power Systems SK
athe power semiconductor switch of control switch unit 3, to connect phase u, v, w and the power supply 2 of power electronic circuit 1.
Alternative as step (a), the functional status that detects each switch element 3 is also possible.According to step (c), Switch State Combination in Power Systems SK to be selected
asubstantially realizing can predefined adjusted value, this means Switch State Combination in Power Systems SK to be selected
asubstantially corresponding to can predefined adjusted value.
According to of the present invention for operate power electronic circuit 1, in particular for operation for switching the method for converter circuit of at least 3 switching voltage levels, a plurality of switch elements that comprise controllable power semiconductor switch also can only be used for the phase u with power electronic circuit 1, v, w connects, that is to say, do not have power supply 2.Described method has following steps:
(a) detect the functional status of at least two switch elements 3;
(b) the Switch State Combination in Power Systems SK of the on off state of the power semiconductor switch of generation switch element 3;
(c) basis is according to the detection of step (a) selector switch combinations of states SK from produced Switch State Combination in Power Systems (SK)
a, Switch State Combination in Power Systems SK to be selected wherein
asubstantially realizing can predefined adjusted value, and
(d) according to selected Switch State Combination in Power Systems SK
athe power semiconductor switch of control switch unit 3, to connect the phase u of power electronic circuit 1, v, w.
By Fig. 4, explain orally in detail this method now.Suppose that a switch element 3 has fault, it is detected and causes Switch State Combination in Power Systems "+2, i, j " and " 2; i, j " to be stopped use (Wegfall) in step (a), and wherein i and j respectively can adopted values "-2 ,-1; 0,1,2 ".This means, in this example, for phase u, no longer can diverter switch voltage level 2V+ and 2V-.Withdraw from service, the Switch State Combination in Power Systems "+2; i; j that no longer can switch " " 2; i; j " in Fig. 4, be shown and cross out, the possible Switch State Combination in Power Systems SK producing in step (b) of on off state of the power semiconductor switch of switch element 3 is wherein shown for the converter circuit that comprises 5 switching voltage levels in Fig. 4.In step (c) at selector switch combinations of states SK
atime consider stopping using of Switch State Combination in Power Systems SK.If the Switch State Combination in Power Systems SK for example previously having selected in Fig. 4
avbe " 0 ,-1 ,-1 " and because can predefined rated value should selector switch combinations of states SK
a" 2,1,0 ", this selection is impossible because of the Switch State Combination in Power Systems "+2, i, j " of stopping using, no longer can switching and " 2, i, j " so.Alternatively, selector switch combinations of states SK for example
atherefore 0 ,-1 ,-2 " and advantageously consider the functional status of the switch element 3 of detection in step (a).Finally in step (d) according to the Switch State Combination in Power Systems SK selecting
a0 ,-1 ,-2 " power semiconductor switch of control switch unit 3, so as to connect converter circuit with power supply 2.Generally speaking, only from produced Switch State Combination in Power Systems SK, select this Switch State Combination in Power Systems SK
a, can switch this Switch State Combination in Power Systems SK with the switch element 3 that can move
a.Therefore, the method according to this invention can be implemented and advantageously allow almost to continue without restriction in the out of order situation of at least one switch element 3 operate power electronic circuit 1 very simply.In addition, the method according to this invention allows to make the selection of available Switch State Combination in Power Systems SK and the functional status of each switch element 3 to continue to mate.For this reason, in Fig. 8 A, exemplarily illustrate according to the block diagram of the embodiment of the method according to this invention.
If because there is no to select the Switch State Combination in Power Systems SK that realization substantially can predefined adjusted value
a(that is to say the Switch State Combination in Power Systems SK not having to select substantially corresponding to can predefined adjusted value
a) and can not selector switch combinations of states SK step (c) in the situation that
a, reduce so described adjusted value, and the mode reducing make according to reduce can predefined adjusted value from residue Switch State Combination in Power Systems SK selector switch combinations of states SK
arsubstantially realize reduce can predefined adjusted value, namely substantially can predefined adjusted value corresponding to what reduce.In addition in Fig. 8 B, exemplarily illustrate according to the block diagram of the embodiment of the method according to this invention.Reduce for example with proportionality coefficient k, to carry out by predefined adjusted value, but also can carry out according to the function of time arbitrarily.Therefore, advantageously, can continue operate power electronic circuit 1 with the adjusted value reducing.According to Fig. 8 A and Fig. 8 B, can come from conditioning equipment 5 by predefined adjusted value.In addition, conditioning equipment 5 comprises already mentioned phase voltage adjusting device or phase current regulation device or Power Conditioning Unit.Advantageously, conditioning equipment 5 is not subject to the impact of the detection of the functional status of at least two switch elements 3 and does not therefore rely on detection.
If defective switch element 3 detected in the step (a) of the method according to this invention, so preferably, guide described switch element electric current via bypass path.Bypass path can be the current path outside defective switch element 3 or can be also the current path in defective switch element 3.
Described adjusted value is preset by phase voltage adjusting device or phase current regulation device or Power Conditioning Unit.Preferably, as adjusted value, preset the phase voltage u of serial connection
uw, u
vu, u
wv.As alternative, as adjusted value, also can preset phase current i
u, i
v, i
w.Alternative as another, as adjusted value, also can preset power, wherein said adjusted value can be apparent power or reactive power or active power.
Extra according to the Switch State Combination in Power Systems SK previously having selected step (c) in the situation that
avselector switch combinations of states SK from produced Switch State Combination in Power Systems SK
abe proved to be favourable.
In another form of implementation of the method according to this invention, determine the phase u of power electronic circuit 1, v, the common-mode voltage on w (Gleichtaktspannung).Can be by measuring or calculate or carrying out for the combination of measurements and calculations to determining of common-mode voltage.Extra according to minimum common-mode voltage selector switch combinations of states SK from produced Switch State Combination in Power Systems SK step (c) in the situation that
a.Realize thus, keep the phase u of power electronic circuit 1, v, the little common-mode voltage on w.
In another flexible program of the method according to this invention, determine the phase u of power electronic circuit 1, v, the serial connection phase voltage u of w
uw, u
vu, u
wv.To serial connection phase voltage u
uw, u
vu, u
wvdetermine can be by measuring or calculate or carrying out for the combination of measurements and calculations.Step (c) in the situation that additionally according to serial connection phase voltage u
uw, u
vu, u
wvchange selector switch combinations of states SK from produced Switch State Combination in Power Systems SK
a.
In addition the unit switch frequency of definite switch element 3 and extra according to unit switch frequency selector switch combinations of states SK from produced Switch State Combination in Power Systems SK step (c) in the situation that in another form of implementation of the method according to this invention,
a.Switch element 3, distribution that especially switch of the power semiconductor switch of switch element 3 uses and quantity can be determined and affect thus and the switching loss of the switching loss of each switch element 3, especially its power semiconductor switch can be limited.As alternative, extra according to minimum unit switching frequency selector switch combinations of states SK from produced Switch State Combination in Power Systems SK step (c) in the situation that
aalso be possible.This means selector switch combinations of states SK
a, wherein affiliated switch element 3 is to only having so far a small amount of switching process.As other alternative, also possible that, step (c) in the situation that among the Switch State Combination in Power Systems SK from produced selector switch combinations of states SK
atime do not consider extraly the highest unit switch frequency.Do not use more continually thus switch element 3, especially its power semiconductor switch that unit switch frequency is high for switching manipulation; therefore protect described switch element 3, especially its power semiconductor switch, and advantageously extend the life-span of the power semiconductor switch of described switch element 3.
In addition, in according to a further embodiment of the method according to the invention, determine the switching frequency of described switch element 3, and extra according to minimal switching frequency selector switch combinations of states SK from produced Switch State Combination in Power Systems (SK) step (c) in the situation that
a.This measure allows to keep the Small Switch Losses of each switch element 3, especially its power semiconductor switch.The power semiconductor switch of protection switch unit 3 and extend life-span of the power semiconductor switch of switch element 3 thus.
In addition, in another form of implementation of the method according to this invention, determine the temperature of switch element 3 power semiconductor switchs and extra according to the minimum temperature of the temperature of the power semiconductor switch of switch element 3, the especially power semiconductor switch of switch element 3 selector switch combinations of states SK from produced Switch State Combination in Power Systems (SK) step (c) in the situation that
a.More continually the switch element of high temperature 3, especially its power semiconductor switch are not used for to switching manipulation thus; thereby protect described switch element 3, especially its power semiconductor switch, and advantageously extend the life-span of the power semiconductor switch of described switch element 3.
As another form of implementation of the method according to this invention, preferably, determine the phase u of power electronic circuit 1, v, the phase voltage u of w
u, u
v, u
win harmonic component and extra according to minimum harmonic component selector switch combinations of states SK from produced Switch State Combination in Power Systems SK step (c) in the situation that
a.So the phase u of power electronic circuit 1, v, the phase voltage u of w
u, u
v, u
win harmonic component can be controlled and be held very little.Also possible that, determine the phase u of power electronic circuit 1, v, the phase current i of w
u, i
v, i
win harmonic component and extra according to minimum harmonic component selector switch combinations of states SK from produced Switch State Combination in Power Systems SK step (c) in the situation that
a.In this form of implementation of the method according to this invention, the phase u of power electronic circuit 1, v, the phase current i of w
u, i
v, i
win harmonic component can obtain favourable control and be held very little.To phase u, v, the phase voltage u of w
u, u
v, u
win harmonic component determine or to phase u, v, the phase current i of w
u, i
v, i
win determining of harmonic component can be by measuring or calculate or carrying out for the combination of measurements and calculations.
The control of the power semiconductor switch of switch element 3 is transmitted and carried out via wired signal transmission or via the signal that utilizes fiber waveguide.Preferably, the control of the power semiconductor switch of switch element 3 is transmitted, for example by air, via electromagnetic wave, carried out via wired signal.By magnetizable solid, via the transmission of wireless signals in corresponding magnetic field, be for example also possible.Preferably, the functional status of monitoring transmission of wireless signals.In the defective situation of transmission of wireless signals, via bypass path guide switch cell current, described bypass path can be the current path outside switch element 3 or can be also the current path in switch element 3.As alternative, also possible that: the functional status of monitoring transmission of wireless signals and in the defective situation of transmission of wireless signals run switch unit 3 independently, that is to say, preferably, self determine its on off state or running status.
Claims (20)
1. the method for operate power electronic circuit (1), wherein said power electronic circuit (1) has a plurality of switch elements (3) that comprise controllable power semiconductor switch, to connect the phase (u of described power electronic circuit (1), v, w) and power supply (2), described method has following steps:
(a) detect the functional status of at least two switch elements (3);
(b) produce the Switch State Combination in Power Systems (SK) of on off state of the described power semiconductor switch of described switch element (3);
(c) basis is according to the detection of step (a) selector switch combinations of states (SK from produced Switch State Combination in Power Systems (SK)
a), Switch State Combination in Power Systems (SK wherein said to be selected
a) substantially realizing can predefined adjusted value, and
(d) according to selected Switch State Combination in Power Systems (SK
a) control the power semiconductor switch of described switch element (3), to connect the described phase (u, v, w) and described power supply (2) of described power electronic circuit (1).
2. the method for operate power electronic circuit (1), wherein said power electronic circuit (1) has a plurality of switch elements (3) that comprise controllable power semiconductor switch, so that the phase (u with described power electronic circuit (1), v, w) connect, described method has following steps:
(c) detect the functional status of at least two switch elements (3);
(d) produce the Switch State Combination in Power Systems (SK) of on off state of the described power semiconductor switch of described switch element (3);
(c) basis is according to the detection of step (a) selector switch combinations of states (SK from produced Switch State Combination in Power Systems (SK)
a), Switch State Combination in Power Systems (SK wherein said to be selected
a) substantially realizing can predefined adjusted value, and
(d) according to selected Switch State Combination in Power Systems (SK
a) control the described power semiconductor switch of described switch element (3), to connect the phase (u, v, w) of described power electronic circuit (1).
3. according to the method for claim 1 or 2, it is characterized in that, if defective switch element (3) in step (a), detected, via bypass path guide switch cell current.
4. according to the method for one of claim 1 to 3, it is characterized in that, described adjusted value is preset by phase voltage adjusting device.
5. according to the method for one of claim 1 to 3, it is characterized in that, described adjusted value is preset by phase current regulation device.
6. according to the method for one of claim 1 to 3, it is characterized in that, described adjusted value is preset by Power Conditioning Unit.
7. according to the method for one of claim 1 to 6, it is characterized in that, extra according to the Switch State Combination in Power Systems (SK previously having selected step (c) in the situation that
av) selector switch combinations of states (SK from produced Switch State Combination in Power Systems (SK)
a).
8. according to the method for one of claim 1 to 7, it is characterized in that, determine the described phase (u of described power electronic circuit (1), v, w) on common-mode voltage and extra according to minimum common-mode voltage selector switch combinations of states (SK from produced Switch State Combination in Power Systems (SK) step (c) in the situation that
a).
9. according to the method for one of claim 1 to 7, it is characterized in that, determine the serial connection phase voltage (u of the described phase (u, v, w) of described power electronic circuit (1)
uw, u
vu, u
wv) and step (c) in the situation that additionally according to described serial connection phase voltage (u
uw, u
vu, u
wv) change selector switch combinations of states (SK from produced Switch State Combination in Power Systems (SK)
a).
10. according to the method for one of claim 1 to 7, it is characterized in that, determine the unit switch frequency of described switch element (3) and step (c) in the situation that, additionally according to described unit switch frequency, from produced Switch State Combination in Power Systems (SK), select described Switch State Combination in Power Systems (SK
a).
11. according to the method for one of claim 1 to 7, it is characterized in that, determine the unit switch frequency of described switch element (3) and step (c) in the situation that, additionally according to minimum unit switching frequency, from produced Switch State Combination in Power Systems (SK), select described Switch State Combination in Power Systems (SK
a).
12. according to the method for one of claim 1 to 7, it is characterized in that, determine the unit switch frequency of described switch element (3) and step (c) in the situation that, the Switch State Combination in Power Systems from produced (SK), select described Switch State Combination in Power Systems (SK
a) time do not consider extraly the highest unit switch frequency.
13. according to the method for one of claim 1 to 7, it is characterized in that, determine the switching frequency of described switch (3), and additionally according to minimal switching frequency, from produced Switch State Combination in Power Systems (SK), select described Switch State Combination in Power Systems (SK step (c) in the situation that
a).
14. according to the method for one of claim 1 to 7, it is characterized in that, determine described switch element (3) described power semiconductor switch temperature and step (c) in the situation that, additionally according to described temperature, from produced Switch State Combination in Power Systems (SK), select described Switch State Combination in Power Systems (SK
a).
15. according to the method for one of claim 1 to 7, it is characterized in that, determines the phase voltage (u of the described phase (u, v, w) of described power electronic circuit (1)
u, u
v, u
w) in harmonic component and step (c) in the situation that, additionally according to minimum harmonic component, from produced Switch State Combination in Power Systems (SK), select described Switch State Combination in Power Systems (SK
a).
16. according to the method for one of claim 1 to 7, it is characterized in that, determines the phase current (i of the described phase (u, v, w) of described power electronic circuit (1)
u, i
v, i
w) in harmonic component and step (c) in the situation that, additionally according to minimum harmonic component, from produced Switch State Combination in Power Systems (SK), select described Switch State Combination in Power Systems (SK
a).
17. according to the method for one of claim 1 to 16, it is characterized in that, the control of the described power semiconductor switch of described switch element (3) is undertaken by transmission of wireless signals.
18. according to the method for claim 17, it is characterized in that, monitor the functional status of described transmission of wireless signals and in the defective situation of transmission of wireless signals via bypass path guide switch cell current.
19. according to the method for claim 17, it is characterized in that, monitors the functional status of described transmission of wireless signals and in the defective situation of transmission of wireless signals, independently moves described switch element (3).
20. according to the method for one of claim 1 to 19, it is characterized in that, if step (c) in the situation that, do not have to select substantially to realize can predefined adjusted value Switch State Combination in Power Systems (SK
a), reduce described can predefined adjusted value, the mode reducing make according to can predefined adjusted value selecting from residue Switch State Combination in Power Systems (SK) of reducing reduce described in realization substantially can predefined adjusted value Switch State Combination in Power Systems (SK
ar).
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|---|---|---|---|
| EP12179723.7 | 2012-08-08 | ||
| EP12179723 | 2012-08-08 |
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| WO2014023569A3 (en) | 2014-09-12 |
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