EP1407531A2 - Method and device for short-circuiting temporary power failures in a matrix converter - Google Patents
Method and device for short-circuiting temporary power failures in a matrix converterInfo
- Publication number
- EP1407531A2 EP1407531A2 EP02760084A EP02760084A EP1407531A2 EP 1407531 A2 EP1407531 A2 EP 1407531A2 EP 02760084 A EP02760084 A EP 02760084A EP 02760084 A EP02760084 A EP 02760084A EP 1407531 A2 EP1407531 A2 EP 1407531A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- voltage
- control
- pointer
- phase angle
- input
- 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.)
- Withdrawn
Links
Classifications
-
- 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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M5/25—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M5/27—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means for conversion of frequency
- H02M5/271—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means for conversion of frequency from a three phase input voltage
-
- 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
- H02M7/5387—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 in a bridge configuration
- H02M7/53871—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 in a bridge configuration with automatic control of output voltage or current
- H02M7/53875—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 in a bridge configuration with automatic control of output voltage or current with analogue control of three-phase output
- H02M7/53876—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 in a bridge configuration with automatic control of output voltage or current with analogue control of three-phase output based on synthesising a desired voltage vector via the selection of appropriate fundamental voltage vectors, and corresponding dwelling times
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
Definitions
- the invention relates to a method for bridging brief power failures in a matrix converter with a plurality of line-side mutation capacitors and a line-side switch unit, and to an apparatus for performing this method.
- UPS uninterruptible power supply system
- a secure network is set up regardless of the state of the supply network, to which the individual drive or several drives mechanically linked can be connected.
- Such a solution is complex and very expensive for single drives or a multi-motor drive.
- An option is known in the field of converter technology with a voltage intermediate circuit that protects converter-fed drives from brief power failures.
- This option is known as kinetic buffering.
- the drive In the case of a single drive, in the event of a power failure, the drive is braked so far into the generator area that the losses of the motor and the converter are covered by the kinetic energy of the motor and the coupled working machine. This is done with the help of a regulator that regulates the intermediate circuit voltage to a fixed value, for example 80% of the nominal value.
- the manipulated variable is the torque setpoint or, in the case of field-oriented control, an addition to the speed setpoint or, for drives with V / f characteristic control, an addition to the frequency setpoint.
- Power supply for the signal processing is either generated separately from a safe source or from the DC link. In this way, signal processing and control remain active, as a result of which the motor remains energized, so that it can be accelerated to the desired speed immediately after the mains voltage returns.
- the "kinetic buffering” option is limited in use to inverters with a DC link or a DC link. This option cannot be used for matrix inverters due to the missing DC link.
- a measure controlling a motor is trix converter connected to a supply network via an optional line filter or EMC filter.
- This line filter is implemented, for example, from line chokes and commutation capacitors, which are connected to the input terminals of the matrix converter.
- the commutation capacitors which can be connected in delta or star, are essential for the operation of the matrix converter.
- the throttles inserted in the supply lines may not be necessary.
- each matrix converter has commutation capacitors and chokes on the input side.
- the matrix converters can also be electrically connected in parallel on the commutation capacitors. With this circuit variant, only three chokes are required for a three-phase supply network.
- the invention is based on the object of specifying a method and a device for bridging brief power failures in a matrix converter.
- the matrix converter in the event of a determined power failure, is disconnected from the supply network and this is regulated during buffer operation in such a way that a capacitor voltage Istra space pointer is set at its input, the amplitude and phase angle of which each assume a predetermined value.
- this set capacitor voltage Istra space pointer is tracked during a synchronization operation to a determined mains voltage Istra space pointer until they coincide, the matrix converter then being connected to the supplying network again.
- a prerequisite for the method according to the invention is an operable separation point between the supply network and the matrix converter. This separation point must be opened in the event of a determined power failure and closed again when the power returns and synchronization has taken place.
- the method according to the invention makes use of the fact that the power factor or the reactive current on the network side can be freely set within certain limits in a matrix converter.
- This regulation of the reactive current on the input side or of the power factor of the matrix converter is a manipulated variable for the regulation of the capacitor voltage space vector during the buffer operation and during the synchronization operation of the method according to the invention.
- a second manipulated variable for the control of the capacitor voltage rau pointer is an intervention with which the speed of the motor connected to the matrix converter can be influenced.
- the voltage at the commutation capacitors is regulated in such a way that the sum of the energy contents of the commutation capacitors is kept at a constant value during the mains failure and that after the mains supply returns, the capacitor voltage is turned to the mains voltage of the supplying mains.
- a device according to the invention for carrying out the method according to the invention has devices for detecting a capacitor voltage and a network voltage space vector, a voltage and phase angle control loop, a network monitoring device, a plurality of changeover switches and a disconnector.
- This sequence control device actuates the changeover switch, thereby switching between the operating modes Normal, buffer and synchronizing operation can be changed.
- the devices mentioned are required for the condition detection of the network and the matrix converter, the device for detecting the network voltage Istraum pointer being provided only as an initial device for the kinetic buffering.
- a reactive current manipulated variable for the buffering and synchronizing operation is predetermined.
- the device for detecting the mains current space vector and the downstream reactive current control circuit are also available for a matrix converter without kinetic buffering, but with the option of power factor control. The effort for the method according to the invention is thus simplified.
- pilot control values are used instead of a phase angle control loop, which are supplied as a manipulated variable to the control-regulating device of the matrix converter by means of a switch depending on the operating mode.
- FIG. 1 shows a block diagram of an individual drive
- FIG. 2 shows a signal flow diagram of a control system for an individual drive according to FIG
- FIG. 3 shows a signal flow diagram of an advantageous control for a single drive according to FIG. 1
- FIG. 4 shows a block diagram of a multi-axis drive
- FIG. 5 shows the signal flow diagram of an associated control of a multi-axis drive
- the FIG. 6 shows a block diagram of a variant of a multi-axis drive
- FIG. 7 showing its associated control as a signal flow diagram.
- 2 is a matrix converter and 4 an associated control and regulating device, 6 a commutation capacitor circuit, 8 a choke circuit, 10 a switch unit, 12 a supply network, 14 a voltage supply device and 16 a drive device Designated engine.
- the matrix converter 2 is linked on the output side to connections of the motor 16 and on the input side to the commutation capacitor circuit 6.
- the matrix converter 2 is linked on the output side to connections of the motor 16 and on the input side to the commutation capacitor circuit 6.
- This commutation capacitor circuit 6 has three commutation capacitors C1, C2 and C3, which are shown here in FIG
- This commutation capacitor circuit 6 is preceded by the choke circuit 8, which can be connected on the input side to the supplying network 12 by means of the switch unit 10.
- the choke circuit 8 has three inductors L1, L2 and L3, which are each arranged in a feed line.
- the switch unit 10 has three switches S1, S2 and S3, with which the feed lines from the supplying network 12 to the choke circuit 8 can be disconnected.
- the voltage supply unit 14 is connected on the input side to the outputs of the switch unit 10 and on the output side to a supply connection of the control and regulating device 4 of the matrix converter 2.
- This control and regulating device 4 is supplied with at least two measured mains phase voltages u N2 and u N3 and measured capacitor voltages u C ⁇ , u c2 and u C 3.
- the measured mains phase voltage u N ⁇ can also be supplied.
- These capacitor voltages u C ⁇ , u c2 and u c3 are measured at the inputs of the matrix converter 2, which thus represent the input voltages of the matrix converter 2.
- two further inputs are at a measured speed actual value n me ß and a predetermined speed value at n *.
- this control and regulating device 4 is supplied with measured mains currents im, i ⁇ j 2 and i N3 .
- this control and regulating device 4 is linked by means of control lines to control inputs of the matrix converter 2 and to a control input of the switch unit 10.
- the choke circuit 8 and the commutation capacitor circuit 6 together form a line filter.
- switches SI, S2 and S3 of switch unit 10 are closed. Ie, these switches SI, S2 and S3 are in the N position, like normal operation.
- Fast switches are to be provided as switches SI, S2 and S3, so that the matrix converter 2 can be immediately disconnected from the network 12 in the event of a power failure.
- Semiconductor contactors can be provided as fast switches SI, S2 and S3. This rapid separation of the matrix converter 2 with the commutation capacitor circuit 6 on the input side means that the energy contents of the capacitors C1, C2 and C3 of the commutation capacitor circuit 6 have decreased insignificantly at the time before the separation.
- a determined capacitor voltage Istra space pointer Hc measure shortly before a power failure corresponds to a determined capacitor voltage Istra space pointer U Cmeß shortly after the separation.
- the input voltage Istraumzeme Cmeß shortly after the
- This input voltage Istraum adapter Cmeß is the mains voltage space pointer uelzeme with nominal amplitude Nen n.
- the motor 16 is controlled in such a way that this nominal value u Ne nn of the network amplitude is maintained, so that only when the power returns the input voltage Istraum pointer u Cmeß must be rotated to the determined mains voltage Istraum adapter u netzmeß .
- the two space pointers u Cmeß and u nelzmeß congruent the synchronization operation is completed and the system switches to normal operation.
- FIG. 2 shows the signal flow diagram of the control and regulating device 4 according to FIG. 1.
- This control and regulating device 4 initially has a control unit 18 and a control unit 20.
- the control unit 18 is preceded by a superimposed speed control circuit 22, which feeds a torque setpoint m * to this control unit.
- the speed control loop 22 consists of a speed controller 24 and a comparator 26, which compares a measured actual speed value n measurement with a predetermined desired speed value n * .
- this control and regulating device 4 has a device 28 for detecting a mains current isometric pointer _ i mtzmeß , a reactive current control circuit 30 and a device 32 for detecting a mains voltage
- the device 28 and the downstream reactive current control circuit 30 are not required to carry out the method according to the invention. These two devices 28 and 30 are one way of generating a third manipulated variable for the control unit 20 in normal operation N.
- a phase angle output of a device 32 for detecting a mains voltage isometric pointer mtzmeß is linked to an angular position input of the device 28 for detecting a mains current isometric pointer _ i mtzmeß .
- the device 28 has a coordinate converter 34 with a vector rotator 36 connected downstream.
- the downstream reactive current control circuit 30 has a controller 38 and a comparator 40.
- the device 32 for detecting a mains voltage isometric pointer u nelzmeß also has a coordinate converter 42, which is followed by a further coordinate converter 44. At least two measured values i 1N 2 and u N2 , u N3 are present at the inputs of the input-side coordinate converter 34 and 42 of the device 28 and 32, respectively. It is also possible that all three measured mains current values in the / 1 N2A ⁇ N3 or mains phase voltages u N ir u N2 , U N3 the Corresponding coordinate converters 34 and 42 are supplied.
- a three-phase system is converted into an orthogonal two-phase system.
- the orthogonally rotating components u N ⁇ and u N ß of the mains voltage isometric pointer are measured in polar components
- Component i referred to as active current and component i ⁇ as reactive current.
- This ascertained reactive current component i ⁇ of the mains current Istraum addresser _ i baummeß is regulated in the downstream reactive current control circuit 30 to a predetermined reactive current setpoint i ⁇ .
- the control variable present at the output of the controller 38 is fed to a third input of the control unit 20.
- Two further inputs of this control unit 20 are linked to an output of a smoothing filter 46 and a phase output of a device 48 for detecting a capacitor voltage isometric pointer Cmeß .
- This capacitor voltage Istraum pointer u Cmeß is from measured capacitor voltages u C 2 and u c3 or u c ⁇ , u c2 and u c3 by means of means 48 for detecting a capacitor voltage Istraum pointer u Cmeß in
- this device 48 has a coordinate converter 50 and a vector rotator 52, which is connected downstream of the coordinate converter 50.
- this coordinate converter 50 uses this coordinate converter 50 to generate two orthogonal circulating voltage components u C ⁇ and u Cß from the measured capacitor voltages u C ⁇ , u c2 and u c3 . These are converted as a function of the phase angle ⁇ c of the determined circulating capacitor voltage isometric pointer u Cmeß into two static polar voltage components.
- the polar component amplitude u c is smoothed by means of the smoothing filter 46.
- the polar component phase angle ⁇ c is also smoothed by means of a vector phase locked loop 54.
- This vector phase locked loop 54 has one
- Matrix converters 2 are required for the calculation of the control signals S v of the matrix converter 2.
- this control and regulating device 4 can also be used for bridging brief power failures, it must first be determined whether there is a power failure.
- a mains failure is determined by means of a mains voltage monitoring device 62, which is connected downstream of the amplitude output of the device 32 for detecting a mains voltage Istraum pointer u mlzme .
- This line voltage monitoring device 62 has a proportional-integral effect Controller 64, which is also referred to as a PI controller, has a comparator 66 and an adder 68.
- PI controller proportional-integral effect Controller
- a comparator 66 By means of this monitoring device 62 it is determined whether the amplitude of the mains voltage actual space pointer nelzmeß falls below a predetermined lower tolerance limit . For this purpose, an amplitude deviation ⁇ u n e tz is determined, which is fed to a sequence control device 70.
- the sequence control device 70 switches from normal operation N to buffer operation P. On the basis of a positive determination, the system switches to buffer mode P with an output signal. This means that all changeover switches 80, 82 and 84 are switched to position P and all controllers marked with P are released.
- This second vector control loop 72 also has a controller 74, an integrator 76, a comparator and an adder 78. At an input of this adder 78 is the nominal value f nominal network frequency f n.
- controllers identified by P include a controller 86 of a voltage control loop 88 and a controller 90 of a phase angle control loop 92.
- the voltage control loop 88 also has a comparator 94, at whose inverting input the amplitude u c of the capacitor voltage Istrum pointer Cmeß and its non- inverting
- the phase angle control circuit 92 likewise has a comparator 96, at whose inverting input the smoothed phase angle ⁇ c of the capacitor voltage isometric pointer u Cmeß and at whose non-inverting input the smoothed phase angle ⁇ network of the mains voltage actual space pointer u mtzmeß .
- the deviations .DELTA.u c and .DELTA..gamma. Determined by means of the comparators 94 and 96 are not only fed to the respective downstream controllers 86 and 90, but also to the sequence control device 70, which evaluates these values.
- the controllers 86 and 90 are pre-controlled.
- these controllers 86 and 90 each have an addition point 98 and 100, respectively.
- the pilot control value for the voltage regulator 86 is a power loss to be expected of the value P puff vo r of the matrix converter 2.
- this summing point 98 is connected to a divider 102, whose output is linked to an input of the switch 80th This divider is only used to linearize the controlled system and to reverse the sign when the direction of rotation is reversed.
- the measured actual speed value n meas is available at the denominator input .
- This switch 80 is connected to the output of the speed controller 24.
- this changeover switch 80 is connected to a control input of the control unit 18, which generates a motor voltage setpoint space vector u motor , from which the control unit 20 then uses the polarity components u c and ⁇ c of the capacitor voltage isometric space pointer u Cmeß and a manipulated variable for the power factor, control signals S v are generated for the semiconductor switches of the matrix converter 2 which can be switched off.
- the manipulated variable for the power factor is no longer generated during the buffer operation P by means of the reactive current control circuit 30, but by means of the phase control circuit 92.
- This phase control circuit 92 has the changeover switch 82 between the input-side comparator 96 and the controller 90, by means of which a determined phase angle deviation ⁇ or a Phase angle ⁇ c of the determined capacitor voltage actual space vector Cmeß can be given to the controller input .
- the outputs of the reactive current regulator 38 and the pilot-controlled phase angle regulator 90 are each connected to an input of the switching Switch 84 connected, which is linked on the output side to an input of the control unit 20 for the manipulated variable for the power factor.
- Phase angle ⁇ c of the determined capacitor voltage iso space vector Cmeß regulated.
- the pilot control value of the phase angle controller 90 is an expected reactive current, which depends on the value of the commutation capacitors C1, C2 and
- the network 12 is monitored for the return of the mains voltage. This is carried out by the sequence control device 70 as a function of the determined amplitude deviation ⁇ u n et z of the mains voltage. Below this amplitude deviation .DELTA.u network a predetermined value, this is the signal for the return of the mains voltage. As soon as this has been recognized, the sequence control device 70 controls the changeover switches 80, 82 and 84 in such a way that they reach the S position for the synchronizing operation S. In addition, all controllers marked with S are released. These switching operations switch from buffer mode P to synchronization mode S.
- the difference between the synchronizing mode S and the buffer mode P is that a determined phase angle deviation ⁇ is now used in the phase locked loop 92 between the phase angle ⁇ ne tz of the mains voltage isometric pointer u zmeß and the phase angle ⁇ c of the capacitor voltage isometric pointer Cmeß .
- the amplitude u c and the phase angle ⁇ c of the capacitor voltage isometric pointer u Cmeß are now regulated so that this capacitor voltage isometric pointer u Cmeß is congruent with the mains voltage isometric pointer u netzme .
- the achievement of this goal can be recognized from the fact that the determined amplitude deviation ⁇ u c and phase angle deviation ⁇ become zero.
- the switches SI, S2 and S3 of the switch unit 10 are closed again and the control and regulating device 4 changes back to normal operation.
- the subsequent acceleration to the original speed setpoint n * can be made smooth by setting the speed setpoint n * via a ramp-function generator, not shown.
- the ramp function generator is set to the current actual speed value n meas when changing to normal operation.
- FIG. 3 shows a signal flow diagram of an advantageous regulation for a single drive according to FIG. 1.
- This advantageous control differs from the signal flow diagram of the control according to FIG. 2 in that instead of a device 28 for detecting a mains current Istraum addresser _ i mtzmeß with a downstream reactive current control circuit 30 pilot values for the power factor and for the frequency of the capacitor voltage for the individual operating modes of the control and Control device 4 of the matrix converter 2 can be used.
- the pilot control values for the power factor are fed to the corresponding input of the control unit 20 by means of a changeover switch 104.
- the precontrol values for the frequency of the capacitor voltage are changed by means of a switch 106 to an input of the comparator 60 of the vector control circuit 54 for smoothing the phase angle ⁇ c of the given average capacitor voltage Istrum pointer Cmeß .
- the manipulated variable "cos ⁇ " is specified in a controlled manner depending on the operating state.
- the frequency of the phase angle ⁇ c of the capacitor voltage isometric pointer u Cmeß is freely set in the buffer mode and during the synchronization.
- the pre-control values fbuffer fsynchron and f ne nn for the buffer mode P, the synchronization mode S and the normal mode N are used only for the pre-control of the vector phase locked loop 54 for smoothing the phase angle ⁇ c of the determined capacitor voltage
- Switching on is achieved when the phase angle deviation ⁇ is approximately zero.
- the requirement for the speed or accuracy of the connection can be reduced by the controlled specification of the reactive current i ⁇ by means of the precontrol value cos an synC ron corresponding to a frequency f sy nchr o n.
- the synchronous times for switching on the switches S1, S2 and S3 then occur less frequently.
- the buffer value f PUff er can also be zero.
- the capacitor voltage Istraum pointer u Cmeß is a standing pointer (DC voltage) and no other consumers can be supplied that are dependent on mains frequency voltages.
- this has one motor 16 ⁇ , 16 2 , I63, one dimension per axis. trix converter 2 ⁇ , 2 2 , 2 3 and a commutation capacitor circuit 6 1 , 6 2 , 6 3 .
- the commutation capacitor circuits 6 ⁇ , 6 2 and 6 3 are connected on the input side to a choke circuit 8 which can be connected on the input side to a supply network 12 by means of a switch unit 10.
- Each commutation capacitor circuit 6 1 , 6 2 and 6 3 has three capacitors C1, C2 and C3, which are connected in a triangle here. These commutation capacitors C1, C2 and C3 can also be connected in star.
- the choke circuit 8 has three inductors L1, L2 and L3, which are each arranged in a feed line.
- the switch unit 10 has three switches S1, S2 and S3, with which the feed lines from the supplying network 12 to the choke circuit 8 can be disconnected.
- a voltage supply unit 14 is connected on the input side to the outputs of the switch unit 10 and on the output side to a supply voltage connection of the control and regulating unit 4 '.
- This control and regulating device 4 ' is supplied with at least two measured line voltages u N3 , u N2 , two measured capacitor voltages u C 3, u c2 and two measured line currents i N 3, i N2 .
- This control and regulating device 4 ' is connected on the output side to the control inputs of the switch unit 10 and in each case to a control and regulating device 4 " ⁇ , 4" 2 and 4 "close to the converter.
- Generated signals n * ⁇ , n * 2 , n * 3 and K ⁇ are fed from the control and regulating device 4 'to the control and regulating devices 4 " lr 4" 2 and 4 " 3 close to the converter.
- FIG. 4 A signal flow diagram of the multi-axis drive according to FIG. 4 is shown in more detail in FIG.
- This signal flow plan differs from the signal flow plan according to FIG. 2 in that the control and regulating unit 4 is now divided into a central unit 4 'and a plurality of converter units 4 ", 4" 2 and 4 " 3.
- the central unit 4' comprises the devices 28, 32 and 48 for detecting a mains current, a mains voltage and a capacitor voltage Istraum adapter _ i mzmeß , u net ⁇ meß and u Cmeß .
- This central unit 4 ' also includes the
- Reactive current control loop 30 the vector phase control loops 54 and 72, the mains voltage monitoring device 62, the sequence control device 70, the phase angle control loop 92 and a modified voltage control loop 88. These components have already been described in detail, so that repetition can be omitted here.
- the manipulated variable for the power factor has been designated K ⁇ here.
- this manipulated variable is not directly supplied to an input of a control unit 20 ⁇ , 20 2 and 20 3, each drive rates this control value K ⁇ with an individual reference value i B eyak f of each of a control unit 18 ⁇ , 18 2 or 18 3 converter units 4 " ⁇ , 4" 2 and 4 ", 3 is generated.
- the individual reference value ISSEs ug for example, from the mains may be derived from Leerlaufström the engine from the minimum current for field weakening or from the momentarily reactive power capability of the associated drive. It is also possible that the individual reference values ISSEs z ug corresponding to a desired division of the posts of the drives are set to the total reactive power. This individual handling of the control value K ⁇ can thus controlling the input-side reactive currents for all drives of the multi-axis drive with the same signal K ⁇ effected.
- the voltage control loop 88 is followed by a device 108 for axis coordination, a device 110 for evaluating a main speed setpoint n *** being connected between the voltage control loop 88 and the device 108 for axis coordination.
- the speed of the whole is determined by means of the main speed setpoint n ***
- the device 110 for evaluation has a multiplier 112 and a subtractor 114.
- the main speed setpoint n *** is present at an input of the multiplier 112 and a weighting factor Ku, which is present at the output of the subtractor 114, is present at the second input.
- this multiplier 112 is connected to an input of the device 108 for axis coordination. ties.
- At the first input of the subtractor 114 there is a constant with the value one and its second input is linked to the output of the voltage control loop 88. Since this voltage control loop 88 is only active during the buffering and synchronizing operation, the main speed setpoint n *** is passed on unchanged to the device 108 for axis coordination in normal operation. In buffer mode and during synchronization, the main speed setpoint n *** is reduced so that the total feed-in power of all drives is zero in total, ie the total power requirement is covered by the kinetic energy of the multi-axis drive.
- the device 108 for axis coordination can be a synchronous control device, an electronic gear, electronic cams or similar couplings, as are common in multi-axis drive configurations.
- the multi-axis drive can of course also be controlled in such a way that individual drives or drive groups continue to run at unchanged speed in buffer operation and during synchronization and only a few drives of this multi-axis drive take over the function "kinetic buffering".
- a ramp-function generator can be used to slowly return to the original main speed after return of power and synchronization.
- the other units of this central unit 4 'mentioned work largely as in the case of an individual drive according to FIG. 2.
- This central unit 4' can be implemented in separate signal processing. However, there is also the possibility of assigning this central unit 4 'to a drive, for example a master drive, of the multi-axis drive. This central unit 4 'can also be distributed to the signal processing of the individual drives. Since the control unit 20 of the matrix converter 2 requires the smoothed components of the determined capacitor voltage Istra space pointer Cmeß (input voltage Istra space pointer), the measured capacitor voltages u C ⁇ , u c2 and u c3 are supplied to each drive of the multi-axis drive shown in FIG. 5, each converter unit 4 ", 4" 2 or 4 " 3 has a device
- the converter unit 4 ", 4" 2 or 4 " 3 also has a multiplier 116 ⁇ , 116 or 116 3 for the individual evaluation of the control signal K ⁇ for the power factor.
- multipliers 116 ⁇ , 116 2 or 116 3 is the generated control signal K ⁇ and at the other input there is a reference current value i B eyaki / ißeyak2 or i B ezu g 3.
- the multiplier 11 ⁇ i, 116 2 or 116 with the input for the control variable of the power factor of the control unit is on the output side 20 ⁇ , 20 2 or 2O 3 connected.
- FIG. 6 shows a variant of the multi-axis drive according to FIG. 4.
- This variant of the multi-axis drive differs from the multi-axis drive according to FIG. 4 in that a throttle unit 81, 82 or 8 3 is assigned to each drive.
- each drive of the multi-axis drive has its own line filter, each of the inductors L1, L2 and L3 of the choke unit 81, 8 2 and 83 and the capacitors Cl, C2 and C3 of the commutation capacitor circuit 6 X , 6 2 and 6 respectively 3 is formed.
- the voltages before and after the switching unit 10 are now evaluated by the central unit 4 '.
- FIG. 7 shows an associated signal flow diagram for the multi-axis drive according to FIG. 6 in more detail.
- This signal flow diagram differs from the signal flow diagram shown in FIG 5 in that instead of a device 28 for detecting a line current space vector i_ robmeß with downstream reactive current control circuit 30, a pilot control value i * ⁇ n ormal is provided.
- each converter unit 4 ", 4" 2 or 4 "3 now has a reactive current control circuit 30regel, 3Ü 2 or 30 3.
- each reactive current control circuit 30 ⁇ , 30 2 or 30 3 of the converter units 4" ⁇ , 4 " 2 or 4 " 3 linked to an input for the manipulated variable of the power factor of the control unit 20 ⁇ , 20 2 or 2O3.
- each drive of the multi-axis drive regulates its own reactive current in normal operation.
- These control inputs are used in buffer mode and during synchronization to regulate the angle of the busbar voltage.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Ac-Ac Conversion (AREA)
- Rectifiers (AREA)
- Inverter Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10135286 | 2001-07-19 | ||
DE10135286A DE10135286B4 (en) | 2001-07-19 | 2001-07-19 | Method and device for bridging short-term power failures in a matrix converter |
PCT/DE2002/002474 WO2003009457A2 (en) | 2001-07-19 | 2002-07-05 | Method and device for short-circuiting temporary power failures in a matrix converter |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1407531A2 true EP1407531A2 (en) | 2004-04-14 |
Family
ID=7692426
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02760084A Withdrawn EP1407531A2 (en) | 2001-07-19 | 2002-07-05 | Method and device for short-circuiting temporary power failures in a matrix converter |
Country Status (5)
Country | Link |
---|---|
US (1) | US6862163B2 (en) |
EP (1) | EP1407531A2 (en) |
CN (1) | CN1533629A (en) |
DE (1) | DE10135286B4 (en) |
WO (1) | WO2003009457A2 (en) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4140552B2 (en) * | 2004-04-28 | 2008-08-27 | トヨタ自動車株式会社 | Automotive power supply device and automobile equipped with the same |
DE102004035799A1 (en) | 2004-07-23 | 2006-03-16 | Siemens Ag | Frequency converter with a capacitor-free DC link |
SE527895C2 (en) * | 2004-12-22 | 2006-07-04 | Abb Ab | Method and apparatus for controlled reconnection of circuit breakers |
DE202006007136U1 (en) | 2006-05-04 | 2006-07-06 | Lelkes, András, Dr. | Control unit for an electric motor, in particular for a fan motor |
DE102008025408B4 (en) * | 2008-05-27 | 2024-06-20 | Sew-Eurodrive Gmbh & Co Kg | Control or regulation method for a converter |
DE102009049934B4 (en) * | 2009-10-19 | 2014-05-15 | Sew-Eurodrive Gmbh & Co Kg | From an electric AC power supplyable electrical device and method for fault detection |
CN102135586B (en) * | 2010-01-22 | 2014-08-13 | 西门子公司 | Method and device for detecting abnormal event of voltage of power grid and power supply monitoring equipment |
CN102175907A (en) * | 2011-03-10 | 2011-09-07 | 华北电力大学(保定) | Flexible wide area power grid phase measurement system |
CN102097865B (en) * | 2011-03-25 | 2013-10-23 | 武汉大学 | Method for restoring power supply in power system |
EP2568560B1 (en) | 2011-09-07 | 2014-12-31 | Siemens Aktiengesellschaft | Frequency inverter and method for detecting and blocking a residual current in a frequency inverter |
EP2680421B2 (en) | 2012-06-29 | 2018-08-08 | Siemens Aktiengesellschaft | Frequency inverter with intermediate circuits and method for preloading same |
CN104584414B (en) * | 2012-08-28 | 2016-10-26 | Abb技术有限公司 | Control the modular converter of two-stage |
DE102012110110B4 (en) | 2012-10-23 | 2016-12-08 | Sma Solar Technology Ag | Inverter, method for operating an inverter and power supply system with an inverter |
DK2816721T3 (en) | 2013-06-17 | 2019-01-28 | Siemens Ag | PROCEDURE FOR OPERATING A DRIVER DEVICE, DEVICE WITH MEANS FOR CARRYING OUT THE PROCEDURE AND DRIVER DEVICE WITH SUCH DEVICE |
CN103346565B (en) * | 2013-07-26 | 2015-03-11 | 华北电力大学 | Method for identifying weak nodes of power grid based on vector digraph |
DK3068024T3 (en) | 2015-03-09 | 2018-04-23 | Siemens Ag | Procedure for controlling a Vienna rectifier |
EP3217522A1 (en) | 2016-03-08 | 2017-09-13 | Siemens Aktiengesellschaft | Bidirectional rectifier device |
US10320306B1 (en) | 2017-12-22 | 2019-06-11 | Hamilton Sundstrand Corporation | Matrix converter system with current control mode operation |
CN111865176B (en) * | 2020-07-13 | 2022-03-22 | 广东萨米特陶瓷有限公司 | Method for coping with power supply flash |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS558250A (en) * | 1978-06-30 | 1980-01-21 | Mitsubishi Electric Corp | Method restarting induction motor |
JPH07110154B2 (en) * | 1984-09-13 | 1995-11-22 | 株式会社日立製作所 | Induction motor operation control method and apparatus |
US4697230A (en) * | 1986-06-23 | 1987-09-29 | Westinghouse Electric Corp. | AC power supplied static switching apparatus having energy recovery capability |
JPH0654586A (en) * | 1992-07-28 | 1994-02-25 | Fuji Electric Co Ltd | Instantaneous stoppage restarting apparatus for inverter of synchronous motor |
JPH06153587A (en) * | 1992-11-10 | 1994-05-31 | Hitachi Ltd | Power-supply device |
JP3422101B2 (en) * | 1994-11-04 | 2003-06-30 | 富士電機株式会社 | Speed sensorless vector control method |
-
2001
- 2001-07-19 DE DE10135286A patent/DE10135286B4/en not_active Expired - Fee Related
-
2002
- 2002-07-05 WO PCT/DE2002/002474 patent/WO2003009457A2/en active Application Filing
- 2002-07-05 CN CNA028146026A patent/CN1533629A/en active Pending
- 2002-07-05 EP EP02760084A patent/EP1407531A2/en not_active Withdrawn
-
2004
- 2004-01-16 US US10/762,756 patent/US6862163B2/en not_active Expired - Fee Related
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO03009457A3 * |
Also Published As
Publication number | Publication date |
---|---|
US20040151119A1 (en) | 2004-08-05 |
CN1533629A (en) | 2004-09-29 |
DE10135286A1 (en) | 2003-02-06 |
WO2003009457A3 (en) | 2003-08-28 |
US6862163B2 (en) | 2005-03-01 |
WO2003009457A2 (en) | 2003-01-30 |
DE10135286B4 (en) | 2006-04-27 |
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