• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    THREE LEVEL ENERGY CONVERSION DEVICE. The present invention relates to a three-level energy conversion apparatus that can suppress fluctuation in a neutral point voltage even when operated as a reactive power regulator. It consists of the three-level converters (2A, 2B) connected to an AC power supply system, the positive-side and negative-side DC capacitors (3P, 3N), a three-level inverter 4 to drive an AC motor ( 5), and a converter control means (10) to control the three-level converters (2A, 2B). The converter control means comprise: first and second current control means (15A, 15B) of the reactive components of the input currents of the three-level converters to a predetermined reference level; first and second neutral point voltage fluctuation suppression means for the PWM control means (17A, 17B) so that a voltage difference applied to the DC capacitors (3P, 3N) zeroes out; and an active current control means that provides predetermined circulating active current from the three-level converter (2A) to (2B).
    公开号:BR112014016923B1
    申请号:R112014016923-3
    申请日:2012-12-25
    公开日:2021-03-16
    发明作者:Kenji Oda；Katsuhiko Fukuma
    申请人:Toshiba Mitsubishi-Electric Industrial Systems Corporation；
    IPC主号:
    专利说明:

    [001] This application is based on and claims the priority benefit of Japanese patent application No. 2012-003911, filed on January 11, 2012; all the content of which is incorporated by reference. Field of the Invention
    [002] The present invention relates to a three-level energy conversion apparatus that is equipped with a three-level converter to obtain a three-level direct current from an AC power source, and a three-phase inverter. levels to convert that direct current into an alternating current. Background of the Technique
    [003] Conventionally, as a power conversion device to drive a motor with a relatively large capacity, a three-level energy conversion device has been used, which is equipped with a three-level converter, and an inverter three levels to convert the direct current from that output to an alternating current. This three-level energy conversion device is configured to have three-level DC voltages composed of a conductive electrical potential, a negative electrical potential, a neutral point, and if the voltage (electrical potential) of the neutral point oscillates, the voltages of an AC power source and the motor as a load of the energy conversion device also fluctuate, to prevent unnecessary harmonics from being generated. For this reason, an order was placed, in which the positive and negative side switching devices are provided, being respectively connected from a neutral point via a common reactor, and when voltage instability occurs, the load from one DC capacitor it is transferred to the other when switching off the switching devices, in order to suppress the variation in the neutral point potential (reference to patent document 1, for example). Prior Art Document
    [004] Patent Document 1: publication of Japanese patent application No. Hei 9-65658 (pages 9 to 10, figure 1) Summary of the Invention Problems to be solved by the Invention
    [005] By the method shown in Patent Document 1, it is possible to suppress the oscillation in the neutral point voltage by a control circuit in addition to the control of the converter or inverter, but it is necessary to add a new circuit, such as a reactor, switching. When a converter has three levels, since it is possible to suppress the variation in the neutral point voltage when controlling the converter, generally, the addition of the circuit as shown in Patent Document 1 is not performed.
    [006] Incidentally, there is an application in which the three-level power conversion device is used, in general, to drive a motor, and when the motor operation is not performed, it is operated as a reactive energy regulator. In the case of an application like this, it becomes difficult to suppress the variation in the neutral point voltage only when carrying out the control described above of the converter. For this reason, this is considered to be caused by the fact that when the three-level energy conversion apparatus is operated as the reactive energy regulator, and the fluctuation in the neutral point voltage is detected and a current is supplied from the converter to perform oscillation suppression control, a delay occurs in neutral point oscillation suppression control.
    [007] The present invention was made in view of the problem described above, and it is an objective to provide a three-level energy conversion apparatus that can suppress oscillation in a neutral point voltage even when operated as a reactive energy regulator. Means to Solve the Problem
    [008] In order to achieve the objective described above, a three-level energy conversion apparatus of the present invention is provided with a first and second three-level converters in parallel with an AC power supply system, each of which emits a three-level direct current, the positive-side and negative-side DC capacitors connected to the three-level DC link, at least one three-level inverter to convert the three-level DC emissions to an alternating current, to drive an engine AC, and the converter control means to control the first and second three-level converters, where the converter control means has the first and second reactive current control means to control so that the reactive parts of the current currents input of the first and second three-level converters become a prescribed reactive current reference, respectively, the first and second means of suppression of voltage fluctuation of point n eutro to control the first and second impulse duration modulation control means, respectively, in order to make a difference between the voltages applied to the positive and negative side DC capacitors to zero, and the active current control means to supply a prescribed active circulating current from the first three-level converter to the second three-level converter. Effects of the Invention
    [009] According to this invention, it is possible to provide a three-level power converter device that can suppress oscillation in a neutral point voltage even when operated as a reactive energy regulator. Brief Description of Drawings
    [0010] Figure 1 is a circuit configuration diagram of a three-level energy conversion apparatus according to a first embodiment of the present invention;
    [0011] figure 2 is a circuit configuration diagram of a three-level energy conversion apparatus according to a second embodiment of the present invention;
    [0012] figure 3 is a circuit configuration diagram of a three-level energy conversion apparatus according to a third embodiment of the present invention;
    [0013] figure 4 is a circuit configuration diagram of a three-level energy conversion apparatus according to a fourth embodiment of the present invention. Modalities to practice the Invention
    [0014] Thereafter, the modalities of the present invention will be described with reference to the drawings. First Mode
    [0015] Figure 1 is a circuit configuration diagram of a three-level energy conversion apparatus according to a first embodiment of the present invention. An AC voltage is supplied from an AC power supply system to the three-level converters 2A, 2B via the respective transformers 1A, 1B. The three-level DC emissions from the respective three-level converters 2A, 2B are connected in parallel to each other, and a 3P DC capacitor is connected between the positive voltage and neutral voltage ends, and a 3N DC capacitor is connected between the negative voltage ends and the neutral voltage ends, both for smoothing. And the three-level DC emissions are given to a three-level inverter 4, and the three-level inverter 4 emits three-level AC voltages to drive an AC 5 motor.
    [0016] A speed detector 6 is attached to the AC 5 motor, and the current detector 7 is attached to the AC 5 motor on the input side, and these output signals are given to an inverter control unit not shown . Current detectors 8A, 8B are respectively fitted to the input sides of the three-level converters 2A, 2B and these input signals are given to a converter control unit 10. From that point, an internal configuration of the control unit of converter 10 will be described.
    [0017] A voltage reference that is a target value of the output voltages of the three-level converters 2A, 2B is compared to a DC voltage feedback, and the result of the comparison is inserted to a voltage controller 12. In this mode, an average value of the respective voltages between both ends of the DC capacitors 3P, 3N is detected by an average value detector 11, and is used as a DC voltage feedback. The emission of the voltage controller 12 becomes an active current reference and, in this mode, the same active current references are respectively sent to the three-level converters 2A, 2B. The correction is carried out for each of the active current references by a current correction circuit 13. In the current correction circuit 13, a circulating current reference part that has been defined separately is added to one of the reference references. active current and the circulating current reference part is subtracted from the other circulating current reference part.
    [0018] Each of the three-phase currents detected by the current detectors 8A, 8B is converted into an active current feedback Iq_FBK and an active current feedback Id_FBK for each of the three-phase / dq converters 14A, 14B.
    [0019] And, a current controller 15A regulates so that the active current feedback Iq_FBK obtained from the three-phase / dq converter 13A becomes the active current reference to which the active current reference part is added, and emits a q axis tension reference. Similarly, a current controller 15B regulates so that the active current feedback Iq_FBK obtained from the three-phase / dq converter 14B becomes the active current reference from which the circulating current reference part described above is subtracted and outputs a q axis voltage reference.
    [0020] In addition, current controllers 15A, 15B regulate so that the reactive current feedback Id_FBK obtained from the three-phase / dq converter 14A and the reactive current feedback Id_FBK obtained from the three-phase / dq converter 14B becomes a reactive current reference that is given from a system monitoring system 20, and emits the d-axis voltage references, respectively. Here, the system monitoring system 20 emits the reactive energy reference so that a reactive energy to be supplied to the AC power supply system becomes a desired value, that is, a value to realize the system power factor. AC power source, for example.
    [0021] Each of the q-axis voltage references and the d-axis voltage references that are obtained in this way and are the respective emissions of the current controllers 15A, 15B are converted into three-phase voltage reference by each of the dq converters / three-phase 16A, 16B. And three-phase voltage references are given to PWM controllers 17A, 17B, respectively, and PWM controllers 17A, 17B perform PWM control to obtain the rectangular PWM signals, and perform ON / OFF control of the power devices. switching of the three-level converters 2A, 2B, respectively.
    [0022] Furthermore, the difference between the respective voltages between both ends of the DC capacitors 3P, 3N is detected by a difference detector 18, and this emission is given to the PWM controllers 17A, 17B as a signal of suppression of oscillation neutral point. For example, when the DC 3P capacitor voltage is greater than the DC 3N capacitor voltage per ΔE, the difference detector 18 results in a correction command to regulate the neutral point voltage so that ΔE becomes 0, to the controllers of PWM 17A, 17B. Upon receiving this correction command, each of the PWM controllers 17A, 17B actually performs an operation to override a DC quantity proportional to ΔE in the voltage reference. In addition, this suppression can also be performed by changing the amplitude of the modulation wave, or by adjusting the zero periods of PWM emissions. The neutral point voltage oscillation suppression control p can be achieved in this way more effectively, as the circulating current correction circuit 13 provides an adequate amount of circulating current from the 3-level converter 2A to the converter level 3B via the CC link, and thus the control delay described above is reduced. Second Mode
    [0023] Figure 2 is a circuit configuration diagram of a three-level energy conversion apparatus according to a second embodiment of the present invention. The same parts as the respective parts of the three-level energy conversion apparatus of the first embodiment of the present invention of figure 1 are shown by the same symbols, and their description will be omitted. The point at which the second mode is different from the first mode is the point at which in a converter control unit 10a, the circulating current correction circuit 13 is moved from the emission side of the voltage controller 12 to the sides of emission of current controllers 15A, 15B.
    [0024] As described in the first modality, the emissions of each of the current controllers 15A, 15B are the voltage reference for the q axis and the voltage reference for the d axis. In the second embodiment, the circulating current correction circuit 13 corrects the voltage references of the q axis which are the active parts. Accordingly, the meaning of the circulating current reference here is a voltage correction part of the q axis to give a desired circulating current.
    [0025] Even when the q axis voltage reference is corrected to result in the circulating current as in this way, it is evident that the same effect as in the first mode is obtained. Third Mode
    [0026] Figure 3 is a circuit configuration diagram of a three-level energy conversion apparatus according to a third embodiment of the present invention. The same parts as the respective parts of the three-level energy conversion apparatus according to the first embodiment of the present invention in figure 1 are shown by the same symbols, and their description will be omitted. The point at which the third mode is different from the first mode is the point at which the three-level inverter is configured to be a parallel configuration of the three-level inverters 4A, 4B that drive the AC motor 5 through coupling reactor 9, the point at which a converter controller 10b is configured to run out of the circulating current correction circuit 13 and the point at which the converter control unit 10 is explicitly indicated.
    [0027] The 3-level inverter 4A is supplied with DC voltages of the 3 levels from the 3-level converter 2A through the DC capacitors 3P, 3N and the 3-level inverter 4B is supplied with the DC voltage of the 3 levels from the 3-level converter 2B through the capacitors DC 3P, 3N. The emission currents of the three-level inverters 4A, 4B are detected by the current detectors 7A, 7B respectively, and these detection signals are given to the converter control unit 30. From that point on, an internal configuration of the control unit converter control 30 will be described.
    [0028] A speed feedback signal detected by speed detector 6 is compared to a speed reference given from the external environment, and a speed controller 31 emits a torque reference so that the difference becomes small. The torque reference is divided by a magnetic flux in a calculator 32, to become a torque current reference. The torque current reference is separated into an A-side torque current reference that is obtained by adding a given circulating current reference to it, and a B-side torque current reference that is obtained by subtracting the reference from circulation current of it. These are performed in the circulating current correction circuit circulating current correction circuit 33. The A-side torque current reference is compared to a q-axis current feedback that is obtained by converting a current detected by the current 7A by a three-phase / dq converter not shown, and the current controller 34A emits a torque voltage reference from side A so the difference becomes small. Similarly, the B-side torque current reference is compared with a B-side q axis current feedback that is obtained by converting a current detected by the current detector 7B by a three-phase / dq converter not shown, and the current controller 34B issues a B-side torque voltage reference so the difference becomes small.
    [0029] Emissions from current controllers 34A, 34B are respectively converted into voltage references of the three phases by the dq / three-phase converters 35A, 35B and then the voltage references of the three phases are given to PWM controllers 36A, 36B , respectively. And the PWM controllers 36A, 36B perform the PWM control to obtain the rectangular PWM signals, and perform the ON / OFF control of the switching devices of the three level inverters 4A, 4B, respectively. In addition, although an excitation axis current reference and its conversion are not mentioned, since in the present mode the AC 5 motor is not activated, the excitation axis current reference is zero and, accordingly, one can think that the excitation voltage reference that is given to the dq / three-phase converters 35A, 35B is zero.
    [0030] With the configuration described above, since the three-level inverter 4A provides an active current from the circulating current reference part, the three-level inverter 4B regenerates the active current from the circulating current reference part, by the effect of the circulating current correction circuit 33, and the active current corresponding to the circulating current is supplied from the three-level converter 2A, and is regenerated from the three-level converter 2B. As a result, the 3-level converter 2A is in the power run operation and the 3-level converter 2B is in the regenerative operation, and thus the respective neutral point controls by the difference detectors 17A, 17B can be performed in a way effective. Fourth Mode
    [0031] Figure 4 is a circuit configuration diagram of a three-level energy conversion apparatus according to a fourth embodiment of the present invention. The same parts as the respective parts of the three-level energy conversion apparatus according to the third embodiment of the present invention in figure 3 are shown by the same symbols, and their description will be omitted. The point at which the fourth mode is different from the third mode is the point at which in an inverter control unit 30a, the circulating current correction circuit 33 is moved from the input sides of the current controllers 34A , 34B to the outlet sides thereof.
    [0032] As described in the third modality, the respective emissions of current controllers 34A, 34B are the torque voltage reference on side A and the torque voltage reference on side B. In the fourth mode, the current correction circuit circulation 33 corrects these voltage references that are the active parts. Accordingly, the meaning of the circulating current reference here is a torque axis voltage correction part to determine a desired circulating current.
    [0033] Even when a torque axis voltage reference is corrected to result in the desired circulating current as in this way, it is evident that the same effect as in the third modality is obtained.
    [0034] Although certain modalities of the present invention have been described, these modalities have been presented by way of example only, and are not intended to limit the scope of the invention. In fact, the new modalities described here can be implemented in several ways; in addition, various omissions, substitutions and changes in the form of the modalities described here can be made without departing from the spirit of the invention. The embodiments and their equivalents are intended to cover such forms or modifications as should be within the scope and spirit of the invention.
    [0035] For example, in all modalities, the circulating current reference can be configured to be linked to the reactive current reference given from the system monitoring system. In this case, the circulating current reference can be proportional to the reactive current reference, and can be increased gradually according to the increase in the reactive current reference.
    [0036] In addition, in the first and second modes, the voltage controller 12 was supplied in common with the three-level converters 2A, 2B, but can be configured to be supplied individually to them. Reference List 1A, 1B transformers 2A, 2B three-level converters 3P, 3N, 3AP, 3AN, 3BP, 3BN DC capacitor 4, 4A, 4B three-level inverter 5 AC motor 6 speed detector 7, 7A, 7B detector current 8A, 8B current detector 9 coupling reactor 10, 10a, 10b converter control unit 11 medium value detector 12 voltage controller 13 current correction circuit 14A, 14B three-phase converter / dq 15A, 15B current controller 16A , 16B dq / three-phase converter 17A, 17B PWM controller 18, 18A, 18B difference detection circuit 20 system monitoring system 30, 30a inverter control unit 31 speed controller 32 calculator 33 circulation current correction circuit 34A, 34B current controller 35A, 35B dq / three-phase converter 36A, 36B PWM controller
    权利要求:
    Claims (9)
    [0001]
    1. Three-level power conversion apparatus, comprising: first and second three-level converters (2A, 2B) co-connectable in parallel to an AC power supply system, each of which is willing to emit a current direct three-level to a CC link; DC capacitors with positive side (3P) and negative side (3N) connected to the DC link of the three levels; at least one three-level inverter (4) to convert the DC emission from the three-level direct current to an alternating current, to drive an AC motor (5); and a converter control means (10) arranged to control the first and second three-level converters (2A, 2B); wherein the converter control means (10) has: first and second reactive current control means (14A, 15A, 20; 14B, 15B, 20) arranged to control, so that the reactive parts of the input currents of the first and second three-level converters (2A, 2B) become a prescribed reactive current reference, respectively; characterized by the fact that the converter control means (10) still comprises: first and second neutral point voltage oscillation suppression means (18) arranged to control a first and a second PWM control means (17A, 17B ) configured to obtain rectangular PWM signals, and perform ON / OFF control of the switching device of the three-level converters (2A, 2B), respectively, in order to make a difference between the voltages applied to the positive-side DC capacitors ( 3P) and negative side (3N) to zero; and an active current control means (12, 13, 14A, 14B, 15A, 15B) arranged to supply a prescribed circulating active current from the first three-level converter (2A) to the second three-level converter (2B) .
    [0002]
    2. Three-level energy conversion apparatus, according to claim 1, characterized by the fact that: the DC emissions of the three levels of the first and second three-level converters (2A, 2B) are connected in parallel, respectively pectively; the number of three-level inverters (4) is one; and the active circulation current is supplied through the DC link.
    [0003]
    3. Three-level energy conversion apparatus, according to claim 2, characterized by the fact that the converter control means (10) comprises: a voltage control means (12) arranged to perform a feedback feedback control so that the DC link voltage becomes a prescribed voltage reference, to emit the first and second common active current references; circulating current correction means (13) arranged to add a circulating current reference to the active current reference to carry out a first corrected active current reference, and to subtract the circulating current reference from the active current reference to carry out a second corrected active current reference; a first active current control means (14A, 15A) arranged to perform feedback feedback (Iq_FBK) so that an active part of the input current of the first three-level converter (2A) becomes the first active current reference corrected to issue a first active voltage reference; a second active current control means (14B, 15B) arranged to perform feedback feedback (Iq_FBK) so that an active part of the input current of the second three-level converter (2B) becomes the second active current reference corrected to issue a second active voltage reference; a first active current control means (14A, 15A, 20) arranged to perform feedback feedback (Id_FBK) so that the reactive part of the input current of the first three-level converter (2A) becomes the reactive current reference prescribed to issue a first reactive voltage reference; a second reactive current control means (14B, 15B, 20) arranged to perform feedback feedback (Id_FBK) so that a reactive portion of the input current of the second three-level converter (2B) becomes the reactive current reference prescribed to issue a second active voltage reference; a first PWM control means (17A) arranged to perform PWM control of a three-phase voltage reference that is obtained by performing the three-phase conversion of the first active voltage reference and the first reactive voltage reference, to generate a rectangular signal from the first converter three levels (2A); a second PWM control means (17B) arranged to perform PWM control of a three-phase voltage reference that is obtained by performing the three-phase conversion of the second active voltage reference and the second reactive voltage reference to generate a rectangular signal from the second voltage converter three levels (2B); and the neutral point voltage oscillation suppression means (18) arranged to control the first and second PWM control means (17A, 17B), in order to realize the difference between the voltages applied to the positive-side DC capacitors ( 3P) and negative side (3N) to zero.
    [0004]
    4. Three-level energy conversion apparatus, according to claim 2, characterized by the fact that the converter control means (10) comprises: a voltage control means (12) arranged to perform feedback feedback control (Iq_FBK) so that the DC link voltage becomes a prescribed voltage reference to emit the first and second common active current references; a first active current control means (14A, 15A) arranged to perform feedback feedback (Iq_FBK) so that an active part of the input current of the first three-level converter (2A) becomes the active current reference for emitting a first active voltage reference; a second active current control means (14B, 15B) arranged to perform feedback feedback so that the active part of the input current of the second three-level converter (2B) becomes the active current reference to emit a second reference active voltage; circulating current correction means (13) arranged to add a voltage reference to the circulating current reference to the first active voltage reference, to make a first corrected active current reference, and to subtract the voltage reference from the current reference circulating the second active voltage reference, to make a second corrected active current reference; the first reactive current control means (14A, 15A, 20) arranged to perform feedback feedback so that the reactive part of the input current of the first three-level converter (2A) becomes the prescribed reactive current reference for issue a first reactive voltage reference; the second reactive current control means (14B, 15B, 20) arranged to perform feedback feedback so that the reactive part of the input current of the second three-level converter (2B) becomes the prescribed reactive current reference for issue a second reactive voltage reference; a first PWM control means (17A) arranged to perform the PWM control of a three-phase voltage reference that is obtained by performing the three-phase conversion of the first corrected active voltage reference and the first reactive voltage reference to generate a rectangular signal from the first three-level converter (2A); a second PWM control means (17B) arranged to perform the PWM control of a three-phase voltage reference that is obtained by performing the three-phase conversion of the second corrected active voltage reference and the second reactive voltage reference to generate a rectangular signal from the second three-level converter (2B); and a neutral point voltage oscillation suppression means (18) arranged to control the first (17A) and second (17B) PWM control means, in order to realize the difference between the voltages applied to the positive-side DC capacitors (3P) and negative side (3N) to zero.
    [0005]
    5. Three-level energy conversion apparatus, according to claim 1, characterized by the fact that it also comprises an inverter control means, in which: the positive-side (3P) and negative-side (3N) DC capacitors ) are composed of two sets (3AP, 3AN, 3BP, 3BN) of DC capacitors respectively connected to the outputs of the first and second three-level converters (2A, 2B); the three-level inverters (4A, 4B) are composed of two three-level inverters (4A, 4B), which are the first and second three-level inverters (4A, 4B), to insert the respective outputs of the first and second converters three levels (2A, 2B); the AC motor (5) is driven by the first and second three-level inverters (4A, 4B) through a coupling reactor; and the inverter control means arranged to control the two three-level inverters (4A, 4B) has a touch current control means to provide a prescribed circulating torque current from the first three-level inverter (4A) to the second three-level inverter (4B) through the coupling reactor.
    [0006]
    6. Three-level energy conversion apparatus, according to claim 5, characterized by the fact that the inverter control means has: a speed control means (31) arranged to perform feedback feedback so that a AC motor speed (5) becomes a prescribed speed reference to output a torque current reference; circulating current correction means (33) arranged to add a circulating current reference to the torque current reference to perform a first corrected torque current reference, and to subtract the circulating current reference from the current current reference torque to perform a second corrected torque current reference; a first torque current control means (34A) arranged to perform feedback feedback so that an emission torque current from the first three-level inverter (4) becomes the first corrected torque current reference to emit a first torque voltage reference; a second torque current control means (34B) arranged to perform feedback feedback so that an emission torque current from the second three-level inverter (4B) becomes the second torque current reference corrected to emit a second torque voltage reference; a first excitation current control means arranged to perform feedback feedback so that an emission excitation current from the first three-level inverter (4A) becomes a prescribed value for emitting a first excitation voltage reference; a second excitation current control means arranged to perform feedback feedback so that an emission excitation current from the second three-level inverter (4B) becomes a prescribed value for emitting a second excitation voltage reference; a first PWM control means (36A) arranged to perform the PWM control of a three-phase voltage reference that is obtained by performing the three-phase conversion of the first torque voltage reference and the first excitation voltage reference to generate a rectangular signal from the first three-level inverter (4A); and a second PWM control means (36B) arranged to perform the PWM control of a three-phase voltage reference that is obtained by performing the three-phase conversion of the second torque voltage reference and the second excitation voltage reference to generate a rectangular signal of the second three-level inverter (4B).
    [0007]
    7. Three-level energy conversion apparatus, according to claim 5, characterized by the fact that the inverter control means (30) comprises: a speed control means (31) arranged to perform feedback feedback ( Iq FBK) so that an AC motor speed (5) becomes a prescribed speed reference for emitting the first and second common active current references; a first torque current control means (34A) arranged to perform feedback feedback (Iq FBK) so that an emission torque current from the first three-level inverter (4A) becomes the first touch current reference for issue a first torque voltage reference; a second torque current control means (34B) arranged to perform feedback feedback (Iq FBK) so that an emission torque current from the second three-level inverter (4B) becomes the second touch current reference for issue a second torque voltage reference; a circulating current correction means (33) arranged to add a voltage reference that corresponds to a circulating current reference to the first touch current reference, to make a first corrected torque voltage reference, and to subtract the voltage reference that corresponds to the circulating current reference from the second torque current reference to make a second corrected torque voltage reference; a first excitation current control means arranged to perform feedback feedback so that an emission excitation current from the first three-level inverter (4A) becomes a prescribed value for emitting a first excitation voltage reference; a second excitation current control means arranged to perform feedback feedback so that an emission excitation current from the second three-level inverter (4B) becomes a prescribed value for emitting a second excitation voltage reference; a first PWM control means (36A) arranged to perform PWM control of a three-phase voltage reference that is obtained by performing the three-phase conversion of the first corrected torque voltage reference and the first excitation voltage reference to generate a rectangular signal from the first three-level inverter (4A); a second PWM control means (36B) arranged to perform PWM control of a three-phase voltage reference that is obtained by performing the three-phase conversion of the second corrected torque voltage reference and the second excitation voltage reference to generate a rectangular signal from the second three-level inverter (4B).
    [0008]
    8. Three-level energy conversion apparatus according to any one of claims 1 to 7, characterized by the fact that: the circulating current reference is increased when the reactive current reference is increased.
    [0009]
    9. Three-level energy conversion apparatus according to any one of claims 1 to 7, characterized by the fact that: the circulating current reference is provided to control so that a reactive energy given to the power source system AC supply becomes a prescribed value, in a state in which the AC motor (5) is not operated.
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    JP5822732B2|2015-11-24|
    EP2804309A4|2016-05-04|
    WO2013105427A1|2013-07-18|
    CN104040864B|2016-08-24|
    BR112014016923A8|2017-07-04|
    CN104040864A|2014-09-10|
    EP2804309B1|2020-03-04|
    BR112014016923A2|2017-06-13|
    JP2013143836A|2013-07-22|
    EP2804309A1|2014-11-19|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JP2609229B2|1986-04-21|1997-05-14|勲 高橋|Controller for circulating current type cycloconverter|
    JP2884880B2|1992-02-12|1999-04-19|株式会社日立製作所|Control device for power converter|
    JP3249380B2|1995-06-13|2002-01-21|株式会社東芝|Power converter|
    JP3186962B2|1995-12-19|2001-07-11|株式会社東芝|NPC inverter device|
    JP2003070263A|2001-08-23|2003-03-07|Hitachi Ltd|Three-level inverter device|
    JP4674722B2|2006-03-17|2011-04-20|国立大学法人静岡大学|Electric vehicle power supply device|
    EP2020740B1|2006-05-23|2018-09-26|Mitsubishi Denki Kabushiki Kaisha|Power converter|
    US8400792B2|2008-08-22|2013-03-19|Toshiba Mitsubishi-Electric Industrial Systems Corporation|Power conversion apparatus|
    EP2270969B8|2009-07-02|2012-04-11|Converteam Technology Ltd|Control methods for parallel-connected power converters|
    US8929111B2|2012-10-22|2015-01-06|Hamilton Sundstrand Corporation|System and method for common-mode elimination in a multi-level converter|EP3065278B1|2013-10-30|2019-08-28|Mitsubishi Electric Corporation|Dc/dc conversion device and load drive control system|
    AU2013408355B2|2013-12-18|2017-06-01|Otis Elevator Company|Bus capacitor bank configuration for a multi-level regenerative drive|
    WO2015108614A1|2014-01-15|2015-07-23|Abb Technology Ag|Modular, multi-channel, interleaved power converters|
    EP2916442B1|2014-03-04|2019-07-24|General Electric Technology GmbH|A voltage source converter|
    JP6318965B2|2014-08-11|2018-05-09|株式会社明電舎|3 level power converter parallel connection system|
    JP6253548B2|2014-08-25|2017-12-27|株式会社東芝|Power converter|
    US10439516B2|2015-06-23|2019-10-08|Nissan Motor Co., Ltd.|Inverter with charging capability|
    EP3320609B1|2015-07-09|2021-09-08|ABB Schweiz AG|Control of electrical converter based on optimized pulse patterns|
    JP6538542B2|2015-12-22|2019-07-03|東芝三菱電機産業システム株式会社|Self-excited reactive power compensator|
    JP6538544B2|2015-12-22|2019-07-03|東芝三菱電機産業システム株式会社|Self-excited reactive power compensator|
    JP6725298B2|2016-04-04|2020-07-15|東海旅客鉄道株式会社|Electric power conversion control device for trains|
    JP6516299B2|2016-07-27|2019-05-22|東芝三菱電機産業システム株式会社|Power converter and control method thereof|
    JP6591374B2|2016-09-08|2019-10-16|東芝三菱電機産業システム株式会社|Excitation device|
    WO2019087238A1|2017-10-30|2019-05-09|東芝三菱電機産業システム株式会社|Power conversion system|
    WO2019097605A1|2017-11-15|2019-05-23|東芝三菱電機産業システム株式会社|Power conversion system|
    CN109905048B|2017-12-08|2021-01-26|台达电子企业管理（上海）有限公司|Neutral point voltage balance control method for three-level circuit|
    WO2019193739A1|2018-04-06|2019-10-10|東芝三菱電機産業システム株式会社|Power conversion device|
    CN110380635B|2018-04-13|2021-08-03|株式会社东芝|Power conversion device and control method for power conversion device|
    EP3883115A1|2018-11-14|2021-09-22|Toshiba Mitsubishi-Electric Industrial Systems Corporation|Power conversion device|
    法律状态:
    2018-12-04| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|
    2019-11-05| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|
    2021-02-02| B09A| Decision: intention to grant|
    2021-03-16| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 25/12/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2012-002911|2012-01-11|
    JP2012002911A|JP5822732B2|2012-01-11|2012-01-11|3-level power converter|
    PCT/JP2012/083416|WO2013105427A1|2012-01-11|2012-12-25|Three-level power conversion device|
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