CN103078483B - High-voltage inverter device and control method thereof - Google Patents

High-voltage inverter device and control method thereof Download PDF

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Publication number
CN103078483B
CN103078483B CN201210408117.4A CN201210408117A CN103078483B CN 103078483 B CN103078483 B CN 103078483B CN 201210408117 A CN201210408117 A CN 201210408117A CN 103078483 B CN103078483 B CN 103078483B
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above
mentioned
voltage
high
unit block
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CN201210408117.4A
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CN103078483A (en
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张东济
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乐星产电(无锡)有限公司
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Abstract

The invention provides a high-voltage inverter device and a control method thereof. The high-voltage inverter device comprises a transformer, a plurality of unit assemblies, and a master controller, each phase of the high-voltage inverter device is provided with the unit assemblies which are respectively provided with a bypass switch, when malfunction occurs, two ends of an output part can be selectively enabled to be short-circuited through the bypass switches according to the malfunction content and the set action standards of different malfunctions. The control method of the high-voltage inverter device comprises the steps: detecting the malfunction content of the unit assemblies; cutting off the pulse width modulation signals outputting towards the malfunctioned unit assembly; according to the detected malfunction content of the unit assembly and the set action standards of different malfunctions, judging whether the malfunction is needed to be removed; and under the condition of judging that the malfunction needs to be removed, executing the bypassing on the bypass control of the unit assembly so as to remove the bypass control of the unit assembly from a circuit.

Description

High-voltage inverter device and control method thereof

Technical field

The present invention relates to high-voltage inverter device and control method thereof, particularly relate to the high-voltage inverter device and control method thereof with roundabout (by-pass) function.

Background technology

High-voltage inverter device widely uses mainly as the speed change gear of the high-tension electric motor of fan (Fan) or pump (Pump) etc.

Fig. 1 is the circuit diagram of existing high-voltage inverter device.

As shown in Figure 1, existing high-voltage inverter device is plural serial stage frequency-converter device, this high-voltage inverter device comprises: transformer 1, and to former limit input high pressure three-phase alternating voltage, and secondary has the tap (tap) of multiple employing extended delta connection mode; Multiple unit block 2, the voltage that exports of multiple taps of receiving transformer 1, performs the function of general single-phase frequency converter independently respectively; Master controller 4, for controlling the action of multiple unit block 2.At this, transformer 1 is the THD(Total Harmonic Distortion for improving input current: total harmonic distortion) phase transformer.

The three-phase input voltage of high-voltage inverter device is 1kV ~ 10kV.Such three-phase input voltage inputs to transformer 1, and the output voltage of transformer 1 inputs to multiple unit block 2.Multiple unit block 2 respectively the output voltage of high-voltage inverter device each mutually on to be arranged in series and the number of the unit block 2 that each phase is connected communicates with each other, and according to the input voltage of high-voltage inverter device and output voltage, the quantity of the unit block 2 that each phase is connected can be 3 to 9, even can be increased to 12.Fig. 1 shows the state each phase being in series with 3 unit blocks 2.With regard to each phase of high-voltage inverter device, by being in series by the output voltage of unit block 2, obtaining motor 3(is such as three-phase induction motor) or High voltage output required for other load devices.

Each unit block 2 comprises: power cell 21; Cell controller 22, is sent to master controller 4 by the information of power cell 21, and controls the action of power cell 21 according to the instruction carrying out autonomous controller 4.

Fig. 2 is the structure chart of the power cell 21 of existing high-voltage inverter device.

As shown in Figure 2, power cell 21 is made up of independently single-phase converter circuit, and this power cell 21 comprises: voltage input part 210, for inputting the voltage exported from the some taps multiple taps of transformer 1; Rectification part 211, carrys out output dc voltage for carrying out rectification to the voltage from voltage input part 210; Inverter unit 212, is converted to the single-phase AC voltage of the pulse mode with desired frequency, and outputs to efferent 213 by the direct voltage exported from above-mentioned rectification part 211 by pulse width modulation (PWM).

Further, rectification part 211 can comprise: diode array 2111, carries out rectification to the three-phase alternating voltage (R, S, T) exported from transformer 1; Smmothing capacitor 2112, converts direct voltage to the smoothing process of voltage exported from diode array 2111.

Like this, output voltage is produced at the efferent 213 of each power cell 21, and in each phase of high-voltage inverter device, the output voltage exported from the efferent 213 of the multiple power cells 21 be located at this phase overlaps, thus produce the sine voltage of high pressure.

As mentioned above, the unit block 2 that power cell 21 and the identical cell controller 22 being used for controlling power cell 21 are combined into is made up of multiple by high-voltage inverter device, and the power cell 21 of each unit block 2 is respectively identical and the cell controller 22 of each unit block 2 is also identical respectively, so because of fault during misoperation, power cell 21 or the cell controller 22 of only changing fault just can be dealt with problems, as long as therefore standing power cell 21 for subsequent use and cell controller 22, this can make the burden of preparation spare unit diminish.

High-voltage inverter device is used in the major part of equipment; therefore MTBF(mean time between failures (MTBF) is required) long (General Requirements 10 years); and require also normally to run under specific circumstances; this particular case refers to; the reason of the fault that the reason because of load etc. or the noise because of environment for use (noise that environment for use causes) cause etc. and frequency converter protection act starts, makes to export situation about stopping.

But; power cell 21 is as single-phase frequency converter; the same with general low voltage frequency converter; also the protective circuit exporting overcurrent, brachium pontis (arm) short circuit, overheated, overvoltage etc. is comprised; when some power cells 21 break down; cell controller 22 in this unit block 2 belonging to power cell 21 stops to this power cell 21 output pwm signal, and this information is sent to master controller 4.

The defect content of this power cell 21 grasped by master controller 4, and system is stopped.

Even if a power cell 21 there occurs fault like this, whole system also can be made to stop.When system stops, user gets rid of this failure cause after confirming defect content, and restarts high-voltage inverter device.Out of service at so a series of process medium-high voltage frequency converter device, therefore use the visual plant of this high-voltage inverter device also can stop.

Such as, when a power cell 21 break down and need to change this power cell 21, need system is stopped to change this power cell 21, so continuous operation cannot be realized, even if therefore when carrying out important operation, the operation of high-voltage inverter device also then may be stopped.

Summary of the invention

The present invention proposes to solve above-mentioned existing issue, its object is to, even if provide a kind of a part of power cell to there occurs fault, high-voltage inverter device and the control method thereof of the continuous operation of system also can be realized by the power cell removing these faults from circuit.

Other object of the present invention is, provide a kind of automatically restore (reset) fault at power cell failure after when restarting, the high-voltage inverter device that again breaks down and control method thereof can be suppressed.

High-voltage inverter device of the present invention for realizing above-mentioned purpose has: transformer, and to former limit input High AC voltage, and secondary has the tap of multiple employing extended delta connection mode; Multiple unit block, receives the voltage exported from multiple taps of above-mentioned transformer respectively, plays the function of single-phase frequency converter independently; Master controller, for controlling the action of above-mentioned multiple unit block.The each of this high-voltage inverter device has multiple said units assembly mutually respectively.The feature of this high-voltage inverter device is, above-mentioned multiple unit block has roundabout switch respectively, when breaking down, this roundabout switch is according to defect content and the action benchmark by different faults that set, optionally make two terminal shortcircuits of efferent, thus on circuit, remove this unit block.

In above-mentioned high-voltage inverter device, preferably, above-mentioned multiple unit block comprises respectively: power cell, and the basis of the circuit of above-mentioned single-phase frequency converter also has above-mentioned roundabout switch; Cell controller, is sent to above-mentioned master controller by the above-mentioned defect content of this power cell, and controls the action of this power cell according to the instruction from above-mentioned master controller.

In above-mentioned high-voltage inverter device, preferably, above-mentioned power cell comprises: voltage input part, for inputting the voltage exported from the some taps multiple taps of above-mentioned transformer; Rectification part, carrys out output dc voltage for carrying out rectification to the voltage from above-mentioned voltage input part; Inverter unit, converts the single-phase AC voltage of the pulse mode with desired frequency to by the direct voltage exported from above-mentioned rectification part by pulse width modulation, and output to above-mentioned efferent; Roundabout switch, when breaking down, optionally making two terminal shortcircuits of above-mentioned efferent, thus on circuit, removing this power cell based on the instruction of defect content according to master controller.

In above-mentioned high-voltage inverter device, above-mentioned rectification part can comprise: diode array, carries out rectification to the alternating voltage exported from above-mentioned transformer; Smmothing capacitor, to the smoothing process of the voltage exported from above-mentioned diode array to convert direct voltage to.

In above-mentioned high-voltage inverter device, when some mutually on have a more than one said units component failure time, other can also be made respectively to go up the above-mentioned roundabout switch conduction also having the unit block of equal number to have mutually.

In above-mentioned high-voltage inverter device, preferably, when said units component failure, make above-mentioned roundabout switch all conductings that each unit block in the stratum belonging to this unit block of fault has, thus each unit block in this stratum is all removed from above-mentioned high-voltage inverter device.

The feature of above-mentioned high-voltage inverter device is, above-mentioned defect content comprises bridgc arm short, output short-circuit, overheated and overvoltage; Above-mentioned set have following content by regulation in the action benchmark of different faults: when defect content be bridgc arm short in above-mentioned defect content or output short-circuit need to carry out removing action, when defect content be bridgc arm short, output short-circuit or overheated need autoboot.

In above-mentioned high-voltage inverter device, preferably, according to the above-mentioned action benchmark by different faults set, each unit block in stratum belonging to this unit block of fault is all removed from above-mentioned high-voltage inverter device, then, utilize current target frequency F=F0*N/N0, Negotiation speed tracing mode carrys out autoboot, wherein, F is current target frequency, F0 is the original target frequency before breaking down, and N is the quantity of the unit block of normal work in each phase, and N0 is the total quantity of the unit block in each phase.

To achieve these goals, the invention provides the control method of high-voltage inverter device, wherein, above-mentioned high-voltage inverter device has: transformer, and to former limit input High AC voltage, and secondary has the tap of multiple employing extended delta connection mode; Multiple unit block, receives the voltage exported from multiple taps of above-mentioned transformer respectively, plays the function of single-phase frequency converter independently; Master controller, for controlling the action of above-mentioned multiple unit block.The each of this high-voltage inverter device has multiple said units assembly mutually respectively.The feature of the control method of above-mentioned high-voltage inverter device is, above-mentioned multiple unit block has roundabout switch respectively, when breaking down, this roundabout switch is according to defect content and the action benchmark by different faults that set, optionally make two terminal shortcircuits of efferent, thus on circuit, remove this unit block, and the control method of this high-voltage inverter device comprises: the step detecting the defect content of multiple said units assembly; Cut off the step of the pulse width modulating signal exported to the unit block of fault; According to the defect content of the said units assembly detected and the action benchmark by different faults that set, determine whether the step of the fault needing to remove; When being judged to be the fault needing to remove, the roundabout control of this unit block roundabout is performed to remove the roundabout rate-determining steps of this unit block from circuit to this unit block.

The feature of the control method of above-mentioned high-voltage inverter device is, above-mentioned roundabout rate-determining steps comprises: make the step that the switch motion of all said units assemblies stops; Make the above-mentioned roundabout switch conducting of all unit blocks in each stratum belonging to each unit block in the more than one said units assembly of fault, from the step that above-mentioned high-voltage inverter device removes; According to the quantity of the unit block removed from each phase, reset the step of current goal frequency; Negotiation speed tracing mode carrys out the step of autoboot.

In the control method of above-mentioned high-voltage inverter device, preferably, also comprise above-mentioned resetting between the step of current goal frequency and the step of above-mentioned autoboot: judge the step whether removing action of all said units assemblies of institute's fault is all terminated.

According to the present invention, then carry out set action benchmark for the various faults that likely can occur when high-voltage inverter device being used in production scene in advance, so restorability fast can be played when breaking down, thus overall dependability can be improved, and V/F ratio can be made after its removal during autoboot to be maintained constant, thus can to avoid again breaking down.

Accompanying drawing explanation

Fig. 1 is the circuit diagram of existing high-voltage inverter device.

Fig. 2 is the structure chart of the power cell of existing high-voltage inverter device.

Fig. 3 is the circuit diagram of high-voltage inverter device of the present invention.

Fig. 4 is the structure chart of the power cell of high-voltage inverter device of the present invention.

Fig. 5 is the flow chart of the control method of high-voltage inverter device of the present invention.

Fig. 6 is the flow chart of the roundabout control method of high-voltage inverter device of the present invention.

Fig. 7 is the figure of the establishing method of the target frequency for autoboot for illustration of high-voltage inverter device of the present invention.

Description of reference numerals

1 ... transformer

2,2 ' ... unit block

21,21 ' ... power cell 22,22 ' ... cell controller

210 ... voltage input part 211 ... rectification part 212 ... inverter unit 213 ... efferent

214 ... roundabout switch

2111 ... diode array 2112 ... smmothing capacitor

3 ... motor

4 ... master controller

Embodiment

Below, with reference to accompanying drawing, the specific embodiment of the present invention is described in detail.

Fig. 3 is the circuit diagram of high-voltage inverter device of the present invention.

With reference to Fig. 3, high-voltage inverter device of the present invention comprises: transformer 1, and to former limit input high pressure three-phase alternating voltage, and secondary has the tap of multiple employing extended delta connection mode; Multiple unit block 2 ', the voltage that exports of multiple taps of receiving transformer 1 respectively, perform the function of general single-phase frequency converter independently, this unit block 2 ' has roundabout switch, when breaking down, this roundabout switch optionally makes two terminal shortcircuits of efferent according to defect content, thus on circuit, remove this unit block; Master controller 4, for controlling the action of multiple unit block 2 '.That is, high-voltage inverter device of the present invention is compared with existing high-voltage inverter device, only have the structure of unit block 2 ' different, and other structures is identical.

Each unit block 2 ' of high-voltage inverter device of the present invention comprises: power cell 21 '; Cell controller 22 ', is sent to master controller 4 by the information of power cell 21 ', and controls the action of power cell 21 ' according to the instruction carrying out autonomous controller 4.

Fig. 4 is the structure chart of the power cell 21 ' of high-voltage inverter device of the present invention.

As shown in Figure 4, power cell 21 ' is made up of independently single-phase converter circuit, and this power cell 21 ' comprising: voltage input part 210, for inputting the voltage exported from the some taps multiple taps of transformer 1; Rectification part 211, carrys out output dc voltage for carrying out rectification to the voltage from voltage input part 210; Inverter unit 212, is converted to the single-phase AC voltage of the pulse mode with desired frequency, and outputs to efferent 213 by the direct voltage exported from above-mentioned rectification part 211 by pulse width modulation (PWM); Roundabout switch 214, when breaking down, optionally making two terminal shortcircuits of efferent 213, thus on circuit, removing this power cell 21 ' based on the instruction of defect content according to master controller 4.

Further, rectification part 211 can comprise: diode array 2111, carries out rectification to the three-phase alternating voltage (R, S, T) exported from transformer 1; Smmothing capacitor 2112, converts direct voltage to the smoothing process of voltage exported from diode array 2111.

Contrast is carried out to Fig. 4 and Fig. 2 known, the power cell 21 ' of high-voltage inverter device of the present invention is compared with the power cell 21 of existing high-voltage inverter device, except the two ends at efferent 213 are also provided with roundabout switch 214, other structures are identical with the power cell 21 of existing high-voltage inverter device.

With reference to Fig. 3 and Fig. 4; power cell 21 ' on the basis of general single-phase converter circuit, also arranges roundabout switch 214 and forms; the same with general low voltage frequency converter circuit, also comprise the protective circuit exporting overcurrent, bridgc arm short, overheated, overvoltage etc.

The voltage input part 210 of the power cell 21 ' of high-voltage inverter device of the present invention, is connected with the corresponding some taps in multiple taps of transformer 1.Further, high-voltage inverter device of the present invention is such as formed as three-phase to drive induction machine even load, and each mutually on be in series with 3 power cells 21 '.

Further, power cell 21 ' conduct independently single-phase converter circuit, each phase of the output voltage of high-voltage inverter device is in series each other.Therefore, by being cascaded by multiple power cell 21 ', the power cell 21 ' of low-voltage can be utilized to produce high voltage.

In addition, electric pressure (voltage level) number that high-voltage inverter device of the present invention exports can increase along with the increase of power cell 21 ' quantity, thus can obtain the voltage waveform of near sinusoidal ripple.

At this, in the different estate (layer) that the mode that each power cell 21 ' is included in the power cell 21 ' comprised in each phase (A, B, C) respectively sets, first stratum comprises power cell A1, power cell B1, power cell C1, second stratum comprises power cell A2, power cell B2, power cell C2, and third class comprises power cell A3, power cell B3, power cell C3.

At this, above-mentioned stratum can be set by known method, and the quantity of stratum is identical with the quantity of the power cell 21 ' of the series connection in each phase.

When power cell 21 ' there occurs fault, roundabout switch 214 removes the power cell 21 ' of fault from high-voltage inverter device, thus high-voltage inverter device can be made to realize running continuously.Now, preferably, all power cells 21 ' in the stratum removing belonging to the power cell 21 ' being included in this fault by each roundabout switch 214, thus motor can be made to run continuously.

Now, be included in all power cells 21 ' in the stratum belonging to power cell 21 ' of above-mentioned fault if remove, although the voltage then exported reduces, can run continuously.

Below, with reference to Fig. 5 and Fig. 6, control method during power cell failure to high-voltage inverter device of the present invention is described.

Fig. 5 is the flow chart of the control method of high-voltage inverter device of the present invention.

With reference to Fig. 5, when more than one power cell 21 ' in high-voltage inverter device breaks down, first the cell controller 22 ' corresponding to this power cell 21 ' of fault detects and confirms that the defect content of power cell 21 ' is any (step (below referred to as S) 1) in bridgc arm short, output short-circuit, overheated or overvoltage.

Cell controller 22 ' cuts off the pwm signal sending to the power cell 21 ' of fault, and the defect content of power cell 21 ' is sent to master controller 4(S2).

Master controller 4, to the defect content of inputted power cell 21 ' and comparing by the action benchmark of different faults as following table 1, determines whether the fault (S3) needing to remove the power cell 21 ' of institute's fault on circuit.

Table 1 is by the action benchmark of different faults

Defect content The need of whether removing The need of autoboot whether Bridgc arm short Output short-circuit Overheated × Overvoltage × ×

In " the action benchmark by different faults " of above-mentioned table 1, " defect content " can comprise all defect content of power cell 21 '.Further, "○" means to be needed to carry out removing action or autoboot, and "×" means and do not need to carry out removing action or autoboot.

When being judged as YES the fault needing to remove (being "Yes" in S3), master controller 4 sends roundabout instruction to cell controller 22 ', thus performs the roundabout control (S4) of this power cell 21 ' roundabout on circuit to this power cell 21 '.The power cell 21 ' being removed institute's fault by roundabout control on circuit, with under the state removing the power cell 21 ' of fault from high-voltage inverter device, by reflex cause barriers such as the replacings of trouble unit, then re-executes each step that S1 is later.

When being judged as not needing the fault removed (being "No" in S3), master controller 4 reduces instruction etc. to the interim halt instruction of cell controller 22 ' transmitting system, frequency and output voltage according to physical fault content, conventional control (S5) reflex cause barrier is carried out to this power cell 21 ', then re-executes each step that S1 is later.

Fig. 6 is the flow chart of the roundabout control method of high-voltage inverter device of the present invention.

With reference to Fig. 6, the roundabout control of S4 is described in detail.

When any more than one power cell 21 ' is removed, such a above power cell 21 ' in high-voltage inverter device can stop action, this can have an impact to other, mutually therefore preferably respectively from each any power cell 21 ' removing equal number mutually.This is because, the quantity of the power cell 21 ' such as in each phase is 6, if a power cell failure and being removed, in this phase, then there are 5 power cells to run, and in other phases, have 6 power cells to run, this can make output voltage uneven, therefore makes any one power cell in other phases also be removed, could realize the balance of output voltage.

Therefore, first master controller 4 makes the switch motion of all power cells 21 ' stop (S401), the stratum that decision will remove, and send roundabout instruction to the cell controller 22 ' corresponding to the power cell 21 ' in determined stratum, connect the roundabout switch 214(S402 of each power cell 21 ' of this stratum).Now, preferably, the stratum that remove is each stratum belonging to more than one power cell 21 ' broken down.

When the above-mentioned defect content detected be the field mark that " whether needs autoboot " in table 1 have a fault of "○", master controller 4 from cell controller 22 ' receive corresponding to power cell 21 ' remove the information of end after, Negotiation speed follow the tracks of (speed search) pattern carry out autoboot.

But when the power cell 21 ' of the above-mentioned stratum of high-voltage inverter device is removed, if drive with original target frequency, then there is stall (stall) because V/F does not mate in fan or pump even load near normal speed.This is because from the characteristic of fan or pump even load, torque needed under normal speed (torque) is large, so voltage reduces when power cell 21 ' is removed.

Therefore, according to the quantity of the power cell 21 ' removed from each phase, reset target frequency (S403).

Fig. 7 is the figure of the establishing method of the target frequency for autoboot for illustration of high-voltage inverter device of the present invention.

With reference to Fig. 7, such as, suppose that rated voltage when each phase having 6 power cells 21 ' run is V0, rated frequency is F0(such as 60Hz), then when the power cell 21 ' be removed because of fault is 1, each phase has that 1 power cell 21 ' is removed in S402 and output voltage becomes 5/6*V0, therefore in order to by V/F than remaining constant, preferably target frequency is set as maximum 5/6*F0(such as 50Hz); When the power cell 21 ' because being removed in fault is 2, each phase having that 2 power cells 21 ' are removed in S402 and output voltage becomes 4/6*V0, therefore preferably target frequency being set as maximum 4/6*F0(such as 40Hz); When the power cell 21 ' be removed because of fault is 3, each phase has that 3 power cells 21 ' are removed in S402 and output voltage becomes 3/6*V0, therefore preferably target frequency is set as maximum 3/6*F0(such as 30Hz); When the power cell 21 ' be removed because of fault is 4, each phase has that 4 power cells 21 ' are removed in S402 and output voltage becomes 2/6*V0, therefore preferably target frequency is set as maximum 2/6*F0(such as 20Hz); When the power cell 21 ' be removed because of fault is 5, each phase has that 5 power cells 21 ' are removed in S402 and output voltage becomes 1/6*V0, therefore preferably target frequency is set as maximum 1/6*F0(such as 10Hz).

What master controller 4 judged whether to receive that the power cell 21 ' of fault has been removed all from each cell controller 22 ' removes ending message (S404).

In the situation (being "Yes" in S404) removing ending message that the power cell 21 ' receiving fault has been removed all, master controller 4 Negotiation speed tracing mode carrys out autoboot (S405).When Negotiation speed tracing mode carrys out autoboot, high-voltage inverter device accelerates to the target frequency set in S403.

Like this, in the control method of high-voltage inverter device of the present invention, except the power cell in the stratum that will remove, other power cells normal are made to carry out switch motion.Therefore, by roundabout switch from all power cells in the stratum belonging to the power cell that circuit removes institute's fault, thus from system, all power cells in the stratum belonging to power cell of institute's fault are removed, therefore, it is possible to make system run continuously.

In addition, according to the present invention, action benchmark is set with in advance for the various faults that likely can occur when high-voltage inverter device being used in production scene, so restorability fast can be played when breaking down, thus overall dependability can be improved, and V/F ratio can be made after its removal during autoboot to be maintained constant, thus the fault that the output overcurrent that may again occur when can prevent from restarting etc. are caused.

Above with reference to accompanying drawing, the technological thought of high-voltage inverter device of the present invention and control method thereof is described, but this is most preferred embodiment of the present invention, and can not limitation of the invention be considered as.

Further, the term that defines in explanation of the present invention considers that the function in the present invention defines, and unintelligible is restriction to technology contents of the present invention.

Therefore, as long as those skilled in the art are clear, the various distortion carried out in the scope of category not departing from technological thought of the present invention and imitation, all belong in protection scope of the present invention.

Claims (5)

1. a high-voltage inverter device,
Have:
Transformer, to former limit input High AC voltage, and secondary has the tap of multiple employing extended delta connection mode,
Multiple unit block, receives the voltage exported from multiple taps of above-mentioned transformer respectively, plays the function of single-phase frequency converter independently,
Master controller, for controlling the action of above-mentioned multiple unit block;
The each of this high-voltage inverter device has multiple said units assembly mutually respectively,
The feature of this high-voltage inverter device is,
Above-mentioned multiple unit block has roundabout switch respectively, and when breaking down, this roundabout switch, according to defect content and the action benchmark by different faults that set, optionally makes two terminal shortcircuits of efferent, thus on circuit, removes this unit block;
Some mutually on have a more than one said units component failure time, also make other respectively go up the above-mentioned roundabout switch conduction also having the unit block of equal number to have mutually;
When said units component failure, make above-mentioned roundabout switch all conductings that each unit block in the stratum belonging to this unit block of fault has, thus each unit block in this stratum is all removed from above-mentioned high-voltage inverter device;
Above-mentioned defect content comprises bridgc arm short, output short-circuit, overheated and overvoltage;
Above-mentioned set have following content by regulation in the action benchmark of different faults: when defect content be bridgc arm short in above-mentioned defect content or output short-circuit need to carry out removing action, when defect content be bridgc arm short, output short-circuit or overheated need autoboot;
According to the above-mentioned action benchmark by different faults set, each unit block in stratum belonging to this unit block of fault is all removed from above-mentioned high-voltage inverter device, then, utilize current target frequency F=F0*N/N0, Negotiation speed tracing mode carrys out autoboot, wherein, F is current target frequency, F0 is the original target frequency before breaking down, and N is the quantity of the unit block of normal work in each phase, and N0 is the total quantity of the unit block in each phase.
2. high-voltage inverter device according to claim 1, is characterized in that, above-mentioned multiple unit block comprises respectively:
Power cell, the basis of the circuit of above-mentioned single-phase frequency converter also has above-mentioned roundabout switch;
Cell controller, is sent to above-mentioned master controller by the above-mentioned defect content of this power cell, and controls the action of this power cell according to the instruction from above-mentioned master controller.
3. high-voltage inverter device according to claim 2, is characterized in that, above-mentioned power cell comprises:
Voltage input part, for inputting the voltage exported from the some taps multiple taps of above-mentioned transformer;
Rectification part, carrys out output dc voltage for carrying out rectification to the voltage from above-mentioned voltage input part;
Inverter unit, converts the single-phase AC voltage of the pulse mode with desired frequency to by the direct voltage exported from above-mentioned rectification part by pulse width modulation, and output to above-mentioned efferent;
Roundabout switch, when breaking down, optionally making two terminal shortcircuits of above-mentioned efferent, thus on circuit, removing this power cell based on the instruction of defect content according to master controller.
4. high-voltage inverter device according to claim 3, is characterized in that, above-mentioned rectification part comprises:
Diode array, carries out rectification to the alternating voltage exported from above-mentioned transformer;
Smmothing capacitor, to the smoothing process of the voltage exported from above-mentioned diode array to convert direct voltage to.
5. a control method for high-voltage inverter device,
This high-voltage inverter device has:
Transformer, to former limit input High AC voltage, and secondary has the tap of multiple employing extended delta connection mode,
Multiple unit block, receives the voltage exported from multiple taps of above-mentioned transformer respectively, plays the function of single-phase frequency converter independently,
Master controller, for controlling the action of above-mentioned multiple unit block;
The each of this high-voltage inverter device has multiple said units assembly mutually respectively,
The feature of the control method of above-mentioned high-voltage inverter device is,
Above-mentioned multiple unit block has roundabout switch respectively, and when breaking down, this roundabout switch, according to defect content and the action benchmark by different faults that set, optionally makes two terminal shortcircuits of efferent, thus on circuit, removes this unit block,
The control method of this high-voltage inverter device comprises:
Detect the step of the defect content of multiple said units assembly,
Cut off the step of the pulse width modulating signal exported to the unit block of fault,
According to the defect content of the said units assembly detected and the action benchmark by different faults that set, determine whether the step of the fault needing to remove,
When being judged to be the fault needing to remove, the roundabout control of this unit block roundabout is performed to remove the roundabout rate-determining steps of this unit block from circuit to this unit block
Above-mentioned roundabout rate-determining steps comprises:
Make the step that the switch motion of all said units assemblies stops,
Make the above-mentioned roundabout switch conducting of all unit blocks in each stratum belonging to each unit block in the more than one said units assembly of fault, from the step that above-mentioned high-voltage inverter device removes,
According to the quantity of the unit block removed from each phase, reset the step of current goal frequency,
Negotiation speed tracing mode carrys out the step of autoboot;
Also comprise above-mentioned resetting between the step of current goal frequency and the step of above-mentioned autoboot: judge the step whether removing action of all said units assemblies of institute's fault is all terminated;
Above-mentioned defect content comprises bridgc arm short, output short-circuit, overheated and overvoltage;
Above-mentioned set have following content by regulation in the action benchmark of different faults: when defect content be bridgc arm short in above-mentioned defect content or output short-circuit need to carry out removing action, when defect content be bridgc arm short, output short-circuit or overheated need autoboot;
Above-mentioned current target frequency F is decided by formula F=F0*N/N0, wherein, F is above-mentioned current target frequency, and F0 is the original target frequency before breaking down, N is the quantity of the unit block of normal work in each phase, and N0 is the total quantity of the unit block in each phase.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5625545A (en) * 1994-03-01 1997-04-29 Halmar Robicon Group Medium voltage PWM drive and method
CN1983784A (en) * 2005-12-12 2007-06-20 上海艾帕电力电子有限公司 Power unit and high-voltage frequency converter with contactor bypass function
CN101299572A (en) * 2008-05-23 2008-11-05 北京合康亿盛科技有限公司 Pass-by apparatus for high voltage frequency transformer
CN101369780A (en) * 2007-08-14 2009-02-18 湖北三环发展股份有限公司 Unit bypass apparatus and control method of unit cascading high voltage frequency convertor
CN102097925A (en) * 2010-12-21 2011-06-15 国电南京自动化股份有限公司 Concatenated high voltage frequency converter bypassing processing method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5625545A (en) * 1994-03-01 1997-04-29 Halmar Robicon Group Medium voltage PWM drive and method
CN1983784A (en) * 2005-12-12 2007-06-20 上海艾帕电力电子有限公司 Power unit and high-voltage frequency converter with contactor bypass function
CN101369780A (en) * 2007-08-14 2009-02-18 湖北三环发展股份有限公司 Unit bypass apparatus and control method of unit cascading high voltage frequency convertor
CN101299572A (en) * 2008-05-23 2008-11-05 北京合康亿盛科技有限公司 Pass-by apparatus for high voltage frequency transformer
CN102097925A (en) * 2010-12-21 2011-06-15 国电南京自动化股份有限公司 Concatenated high voltage frequency converter bypassing processing method

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