Power instruction conversion device, power instruction conversion method, and power instruction conversion program

Abstract

To reuse an existing inverter for another device.SOLUTION: A power instruction conversion device includes a conversion unit and an output unit. The conversion unit converts a second output requirement value that is required for a second power supply target which is different from a first power supply target and is connected to an inverter having been used for supplying power to the first power supply target and an inverter control device for controlling the inverter, to a first output requirement value that is required for the first power supply target, based on a voltage value of a voltage which is output from the inverter to the second power supply target and the second output requirement value. The output unit outputs the first output requirement value obtained by the conversion by the conversion unit, to the inverter control device.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a power command conversion device, a power command conversion method, and a power command conversion program. [Background technology]

[0002] Patent Document 1 discloses a control device for an electric vehicle including conversion means for converting the voltage of a DC power supply to generate a system voltage on a power supply line, and at least one motor drive unit (hereinafter referred to as an "MG unit") consisting of an inverter connected to the power supply line and an AC motor driven by the inverter, the control device includes system voltage control means for executing system voltage stabilization control so as to suppress fluctuations in the system voltage by manipulating the power applied to the power supply line, current control means for independently controlling the torque of the AC motor and the input power of the MG unit, conversion power control means for executing conversion power control to control the input power or output power (hereinafter referred to as "conversion power") of the conversion means, conversion voltage control means for executing conversion voltage control to control the output voltage of the conversion means, and a control circuit for controlling the conversion power control and the conversion voltage control. and selecting means for selecting one of the above-mentioned control operations to be performed and for prohibiting the execution of the system voltage stabilization control when the execution of the conversion voltage control is selected, the system voltage control means comprising target power control amount calculation means for calculating a target operation amount of power applied to the power supply line (hereinafter referred to as "target power control amount"), and distributing means for distributing the target power control amount calculated by the target power control amount calculation means into an MG power control amount command value for controlling the MG unit and a conversion power control amount correction value for controlling the converted power, the conversion power control means controls the converted power using the conversion power control amount correction value distributed by the distribution means, and the current control means controls the MG unit using the MG power control amount command value distributed by the distribution means. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2008-43179 A Summary of the Invention [Problem to be solved by the invention]

[0004] In order to realize a circular economy, it is effective to reuse inverters that control the output of motors that drive hybrid vehicles, etc., as grid-connected inverters for connecting renewable energy generators or storage batteries to grid power.

[0005] However, since an inverter for driving a motor in a vehicle needs to be input with a required output value of the motor, it cannot be reused as an inverter for grid connection as it is.

[0006] An object of the present disclosure is to provide a power command conversion device, a power command conversion method, and a power command conversion program that can enable an existing inverter to be reused in another device. [Means for solving the problem]

[0007] A power command conversion device according to a first aspect of the present disclosure includes a conversion unit that converts, for a second power supply target different from a first power supply target, an inverter used for supplying power to a first power supply target and an inverter control device for controlling the inverter, based on a voltage value of a voltage output from the inverter and a second output request value required of the second power supply target, into a first output request value required of the first power supply target, and an output unit that outputs the first output request value converted by the conversion unit to the inverter control device.

[0008] A power command conversion method according to a second aspect includes a process performed by at least one processor for a second power supply target, different from the first power supply target, connected to an inverter used for supplying power to a first power supply target and an inverter control device for controlling the inverter, converting the second output requirement value into a first output requirement value required for the first power supply target based on a voltage value of a voltage output from the inverter and a second output requirement value required for the second power supply target, and outputting the converted first output requirement value to the inverter control device.

[0009] A power command conversion program according to a third aspect causes at least one processor to execute a process including converting, for a second power supply target different from a first power supply target and connected to an inverter used for supplying power to a first power supply target and an inverter control device for controlling the inverter, the second output requirement value based on a voltage value of a voltage output from the inverter and a second output requirement value required of the second power supply target, into a first output requirement value required of the first power supply target, and outputting the converted first output requirement value to the inverter control device. Effect of the Invention

[0010] The present disclosure has an advantage that an existing inverter can be reused in other devices. [Brief description of the drawings]

[0011] [Figure 1] 1 is a configuration diagram of an inverter control system according to a first embodiment. [Diagram 2] 1 is a configuration diagram of an inverter control device and a power command conversion device according to a first embodiment. [Diagram 3] 4 is a diagram showing a correspondence relationship between a torque command value and a current command value; [Figure 4] 4 is a diagram showing a correspondence relationship between a current command value and a torque command value; [Diagram 5] FIG. 11 is a diagram illustrating a hardware configuration of a power command conversion device according to a second embodiment. [Figure 6] 10 is a flowchart of a power command conversion process according to a second embodiment. [Figure 7] FIG. 11 is a configuration diagram of an inverter control device and a power command conversion device according to a third embodiment. [Figure 8] FIG. 13 is a configuration diagram of an inverter control device and a power command conversion device according to a fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings.

[0013] First Embodiment

[0014] As shown in FIG. 1, an inverter control system 10 according to this embodiment includes an inverter 20, an inverter control device 30, and a power command conversion device 40.

[0015] The inverter 20 is an inverter for driving a motor used to drive a vehicle such as a hybrid vehicle, a plug-in hybrid vehicle, an electric vehicle, etc. The motor used to drive the vehicle is an example of a first power supply target.

[0016] The inverter 20 is controlled by an inverter control device 30. The inverter 20 and the inverter control device 30 were originally mounted on a vehicle and used to drive a motor that drives the vehicle.

[0017] In this embodiment, the inverter 20 is not used to drive a motor used to drive a vehicle, but is used to supply power to other power supply targets. Specifically, as shown in Fig. 1, the inverter 20 converts a DC voltage supplied from a power generation device 50 into a three-phase AC voltage and supplies it to a grid power device 70 via a grid connection device 60.

[0018] The power generation device 50 is, for example, a power generation device that generates power by utilizing renewable energy such as sunlight, but is not limited to this.

[0019] In this manner, in this embodiment, the inverter 20 and the inverter control device 30 that were originally used for a motor for driving a vehicle are reused for driving the power supply to the power grid device 70. The power grid device 70 is an example of a second power supply target.

[0020] The inverter 20 includes, for example, six switching elements S1 to S6. The inverter 20 has a configuration in which a switching element S1 and a switching element S2 connected in series, a switching element S3 and a switching element S4 connected in series, and a switching element S5 and a switching element S6 connected in series are connected in parallel.

[0021] In addition, a connection point C1 between the switching element S1 and the switching element S2 is connected to the grid connection device 60. Similarly, a connection point C2 between the switching element S3 and the switching element S4 is connected to the grid connection device 60, and a connection point C3 between the switching element S5 and the switching element S6 is connected to the grid connection device 60.

[0022] When there is no need to distinguish between the switching elements S1 to S6, they may simply be referred to as switching elements S. As the switching elements S, for example, IGBTs (Insulated Gate Bipolar Transistors) are used, but the present invention is not limited to this.

[0023] The switching element S is controlled by the inverter control device 30. Specifically, the inverter control device 30 controls the switching of the switching elements S1 and S2 by a switching control signal Su. The inverter control device 30 also controls the switching of the switching elements S3 and S4 by a switching control signal Sv. The inverter control device 30 also controls the switching of the switching elements S5 and S6 by a switching control signal Sw.

[0024] A DC voltage is supplied to the inverter 20 from the power generation device 50. The inverter control device 30 controls the switching of each of the switching elements S1 to S6, so that the inverter 20 converts the DC voltage supplied from the power generation device 50 into a three-phase AC voltage and outputs it to the grid connection device 60.

[0025] Current values ​​Iu, Iv, Iw of the three-phase AC currents are detected by current sensors 21u, 21v, 21w, respectively, and output to the inverter control device 30. In addition, a voltage output from the connection point C3 to the grid connection device 60 is detected by a voltage sensor 22, and a voltage value Va of the detected voltage is output to the inverter control device 30 and the power command conversion device 40.

[0026] The power command conversion device 40 generates a torque command value Tq based on an output required value, i.e., a power command value, required for the power output by the grid power device 70 and a voltage value Va of the voltage detected by the voltage sensor 22, and outputs the torque command value Tq to the inverter control device 30.

[0027] As described above, the inverter 20 and the inverter control device 30 are originally intended for driving a motor of a vehicle, and the inverter control device 30 is originally designed to receive a torque command value of the motor as an output requirement value. Therefore, the power command conversion device 40 converts the power command value of the grid power device 70 into a torque command value of the motor and outputs it to the inverter control device 30. The torque command value is an example of a first output requirement value, and the power command value is an example of a second output requirement value.

[0028] The inverter control device 30 performs feedback control by controlling the switching of the switching elements S1 to S6 based on the current values ​​Iu, Iv, Iw and the voltage value Va of the three-phase AC current.

[0029] Next, specific configurations of the inverter control device 30 and the power command conversion device 40 will be described.

[0030] As shown in FIG. 2, the inverter control device 30 includes a current command value acquisition unit 31, a three-phase / two-phase conversion unit 32, subtraction units 33A, 33B, PI control units 34A, 34B, a two-phase / three-phase conversion unit 35, a PWM signal generation unit 36, and a phase detection unit 37.

[0031] The current command value acquisition unit 31 stores map data 31A. For example, as shown in FIG. 3, the map data 31A includes a torque command value as an output request value of a motor of a vehicle to which the inverter 20 was originally connected, and a d-axis current command value Id * and the q-axis current command value Iq * The map data 31A is table data representing the correspondence between the map data and the vehicle speed. The map data 31A is an example of first map data. The map data 31A may be rewritable from an external device.

[0032] The current command value acquisition unit 31 acquires a d-axis current command value Id corresponding to the torque command value input from the power command conversion device 40. * and q-axis current command value Iq * is obtained by referring to the map data 31A, and the d-axis current command value Id * is output to the subtraction unit 33A, and the q-axis current command value Iq * is output to the subtraction unit 33B.

[0033] The three-phase / two-phase conversion unit 32 converts the three-phase current values ​​Iu, Iv, Iw into two-phase current values ​​Ix, Iy based on the current values ​​Iu, Iv, Iw detected by the current sensors 21u, 21v, 21w and the phase of the voltage Va input from the phase detection unit 37, and outputs them to subtraction units 33A, 33B, respectively.

[0034] The subtraction unit 33A subtracts the d-axis current command value Id * d-axis current command value Id obtained by subtracting the current value Ix output from the three-phase / two-phase conversion unit 32 from * ' to the PI control unit 34A.

[0035] The subtraction unit 33B subtracts the q-axis current command value Iq * The q-axis current command value Iq obtained by subtracting the current value Iy output from the three-phase / two-phase conversion unit 32 from * ' to the PI control unit 34B.

[0036] The PI control unit 34A calculates the d-axis current command value Id * ' is controlled by PI control (proportional integral control) to obtain the voltage command value Vd * and outputs it to the two-phase / three-phase conversion unit 35.

[0037] The PI control unit 34B calculates the q-axis current command value Iq * ' is controlled by PI control to obtain the voltage command value Vq * and outputs it to the two-phase / three-phase conversion unit 35.

[0038] The two-phase / three-phase converter 35 converts the voltage command value Vd input from the PI controller 34A based on the phase of the voltage Va input from the phase detector 37. * and the voltage command value Vq input from the PI control unit 34B * The three-phase voltage command value Vu * , Vv * , Vw * and outputs it to the PWM signal generating unit 36.

[0039] The PWM signal generating unit 36 ​​converts the voltage command value Vu * , Vv * , Vw *Based on this, the control circuit 10 generates switching control signals Su, Sv, and Sw for controlling the switching of the inverter 20 and outputs them to the inverter 20. The switching control signals Su, Sv, and Sw are pulse width modulation (PWM) signals.

[0040] The phase detection unit 37 detects the phase of the voltage detected by the voltage sensor 22 and outputs the detected phase to the three-phase / two-phase conversion unit 32 and the two-phase / three-phase conversion unit 35 .

[0041] As shown in FIG. 2, the power command conversion device 40 includes a torque command value acquisition unit 41 and a division unit 42.

[0042] The torque command value acquisition unit 41 includes map data 41A expressed as an inverse function of the map data 31A stored in the current command value acquisition unit 31 of the inverter control device 30. Specifically, as shown in FIG. 4, the map data 41A is table data that indicates the correspondence relationship between the current command value Ia and the torque command value Tq. The map data 41A is an example of first map data. Note that the map data 41A may be rewritable from an external device. The torque command value acquisition unit 41 is an example of a conversion unit, an output unit, and an output request value acquisition unit.

[0043] The division unit 42 calculates a current command value Ia by dividing the power command value Pc input from a higher-level device (not shown) by, for example, the voltage value Va detected by the voltage sensor 22. Note that the current command value Ia may be calculated using an arbitrarily set voltage command value Va instead of the voltage value Va detected by the voltage sensor 22. The calculated current command value Ia is then output to the torque command value acquisition unit 41. Here, the current command value Ia is expressed by the following equation. Ia=(Id *2 +Iq *2 ) 1 / 2 (1)

[0044] As described above, in this embodiment, the power command conversion device 40 acquires the torque command value Tq corresponding to the input power command value and outputs it to the current command value acquisition unit 31 of the inverter control device 30. This makes it possible to reuse the existing inverter 20 that was originally used for driving the motor of the vehicle for the grid power device 70. In addition, since it is only necessary to add the power command conversion device 40, there is no need to change the inverter 20 and the inverter control device 30.

[0045] <Second embodiment>

[0046] Next, a second embodiment will be described. Note that the same parts as those in the first embodiment are given the same reference numerals, and detailed description will be omitted.

[0047] In the second embodiment, a case will be described in which the power command conversion device 40 generates a torque command value Tq by software processing and outputs it to the inverter control device 30.

[0048] 5 is a block diagram showing a hardware configuration of the power command conversion device 40. As shown in FIG.

[0049] The controller 45 includes a central processing unit (CPU) 45A, a read only memory (ROM) 45B, a random access memory (RAM) 45C, and an input / output interface (I / O) 45D. The CPU 45A, the ROM 45B, the RAM 45C, and the I / O 45D are connected to each other via a bus 45E. The bus 45E includes a control bus, an address bus, and a data bus. A communication unit 46 and a storage unit 47 are connected to the I / O 45D.

[0050] The communication unit 46 is an interface for performing data communication with the inverter control device 30 and the like.

[0051] The storage unit 47 is configured with, for example, a non-volatile memory. As shown in Fig. 5, the storage unit 47 stores a power command conversion program 47A, map data 41A, and the like.

[0052] The CPU 45A is an example of a processor. The term "processor" used here refers to a processor in a broad sense, and includes a general-purpose processor (e.g., a CPU) and a dedicated processor (e.g., a graphics processing unit (GPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), a programmable logic device, etc.).

[0053] The power command conversion program 47A may be stored in a non-volatile non-transitory recording medium or distributed via a network and installed in the power command conversion device 40 as appropriate.

[0054] Examples of non-volatile non-transient recording media include CD-ROMs (Compact Disc Read Only Memory), magneto-optical disks, HDDs (Hard Disk Drives), DVD-ROMs (Digital Versatile Disc Read Only Memory), flash memories, memory cards, and the like.

[0055] Next, a flowchart of the power command conversion process executed by the CPU 45A of the power command conversion device 40 will be described with reference to Fig. 6. The CPU 45A reads and executes the power command conversion program 47A stored in the storage unit 47, thereby executing the power command conversion process shown in Fig. 6. The process in Fig. 6 is executed repeatedly.

[0056] In step S100, the CPU 45A, functioning as the division unit 42, calculates a current command value Ia by dividing the power command value Pc input from a higher-level device (not shown) by the voltage value Va detected by the voltage sensor 22. Note that the current command value Ia may be calculated using an arbitrarily set voltage command value Va instead of the voltage value Va detected by the voltage sensor 22.

[0057] In step S101, the CPU 45A, functioning as the torque command value acquisition unit 41, acquires the torque command value Tq corresponding to the current command value Ia acquired in step S100 by referring to the map data 41A.

[0058] In step S102, the CPU 45A functions as the torque command value acquisition unit 41 and outputs the current command value Ia acquired in step S101 to the inverter control device 30.

[0059] As described above, in this embodiment, the CPU 45A of the power command conversion device 40 executes the power command conversion process by reading and executing the power command conversion program 47A stored in the storage unit 47. As a result, the torque command value Tq corresponding to the power command value Pc is output to the inverter control device 30. Therefore, the existing inverter 20 that was originally used for driving the motor of the vehicle can be reused for the grid power device 70.

[0060] <Third embodiment>

[0061] Next, a third embodiment will be described. Note that the same parts as those in the first embodiment are given the same reference numerals, and detailed description will be omitted.

[0062] In the first embodiment, the case has been described in which the power command conversion device 40 is provided with map data 41A that represents an inverse function of the map data 31A stored in the current command value acquisition unit 31 of the inverter control device 30. However, since the inverter control device 30 was originally used for driving a vehicle motor, the contents of the map data 31A may be unknown.

[0063] Therefore, as shown in FIG. 7, a power command conversion device 40A according to this embodiment is equipped with a map data generation unit 43 instead of the torque command value acquisition unit 41 and the division unit 42, as compared with the power command conversion device 40 shown in FIG. 2.

[0064] The map data generating unit 43 stores map data 43A. The map data 43A is table data that indicates the correspondence between the power command value Pc and the torque command value Tq. Since the contents of the map data 31A are unknown, the map data 43A that indicates the correspondence between the predetermined power command value Pc and the torque command value Tq is stored. The map data generating unit 43 also receives the current value Iw detected by the current sensor 21w and the voltage value Va detected by the voltage sensor 22, and calculates an actual power value Pc' based on the input current value Iw and voltage value Va. Then, the power command value Pc in the map data 43A is replaced with the power value Pc'. By repeating this, the map data 43A is successively updated.

[0065] As described above, in this embodiment, the map data generating unit 43 calculates the power value Pc' based on the current value Iw and the voltage value Va, and updates the map data 43A with the calculated power value Pc'. Therefore, even if the contents of the map data 31A of the inverter control device 30 are unknown, the map data 43A can be constructed by the map data generating unit 43 itself.

[0066] <Fourth embodiment>

[0067] Next, a fourth embodiment will be described. Note that the same parts as those in the first embodiment are given the same reference numerals, and detailed description thereof will be omitted.

[0068] When the inverter 20 is used as an inverter for grid connection, if an abnormality occurs in the grid power device 70 and the upper system is cut off, for safety reasons, it is necessary to detect the cut-off operation of the upper system and stop operation so that the inverter 20 does not operate alone (islanding operation prevention function).

[0069] As shown in FIG. 8, a power command conversion device 40B according to this embodiment includes a voltage fluctuation detection unit 80 and an addition unit 44 as a function for preventing the inverter 20 from operating alone.

[0070] As shown in FIG. 8, the voltage fluctuation detection unit 80 includes a fundamental wave voltage calculation unit 81, a harmonic voltage calculation unit 82, a voltage frequency calculation unit 83, and a power command calculation unit 84.

[0071] The fundamental wave voltage calculation unit 81 calculates the fundamental wave component of the voltage value Va detected by the voltage sensor 22 .

[0072] The harmonic voltage calculation unit 82 calculates the harmonic components of the voltage value Va detected by the voltage sensor 22 .

[0073] The voltage frequency calculation unit 83 calculates the frequency component of the voltage value Va detected by the voltage sensor 22 .

[0074] The power command calculation unit 84 determines whether the upper system is cut off by determining whether the degree of change of at least one of the fundamental wave component of the voltage value Va calculated by the fundamental wave voltage calculation unit 81, the harmonic component of the voltage value Va calculated by the harmonic voltage calculation unit 82, and the frequency component of the voltage value Va calculated by the voltage frequency calculation unit 83 is equal to or greater than a predetermined threshold. The power command calculation unit 84 also calculates a power command value that increases reactive power based on the degree of change of at least one of the fundamental wave component of the voltage value Va, the harmonic component of the voltage value Va calculated by the harmonic voltage calculation unit 82, and the frequency component of the voltage value Va calculated by the voltage frequency calculation unit 83, and outputs the power command value to the adder 44. The adder 44 adds the power command value calculated by the power command calculation unit 84 to the power command value Pc input from a higher-level device (not shown), and outputs the result to the divider 42. As a result, the torque command value acquisition unit 41 outputs a torque command value Tq that increases the reactive power, improving the accuracy of detecting abnormalities such as a blockage of the upper system, and efficiently preventing the inverter 20 from operating alone.

[0075] The present disclosure is not limited to the above-described embodiments, and various modifications and applications are possible without departing from the spirit and scope of the present invention.

[0076] In addition, the configuration of the inverter control system 10 described in the above embodiment is just one example, and it goes without saying that unnecessary parts may be deleted or new parts may be added without departing from the spirit of the present invention.

[0077] In addition, the processing flow of the power command conversion program 47A described in the second embodiment (see FIG. 6) is also one example, and it goes without saying that unnecessary steps may be deleted, new steps may be added, or the processing order may be changed without departing from the spirit of the present invention.

[0078] The control unit and the method described herein may be implemented by a special-purpose computer having a processor programmed to execute one or more functions embodied in a computer program. Alternatively, the device and the method described herein may be implemented by a special-purpose computer having a processor configured by dedicated hardware logic circuits. Alternatively, the device and the method described herein may be implemented by one or more special-purpose computers configured by a combination of a processor that executes a computer program and one or more hardware logic circuits. The computer program may also be stored in a computer-readable non-transitory tangible recording medium as instructions to be executed by the computer.

[0079] The following notes are disclosed regarding the technology of the present disclosure.

[0080] <Additional Notes> (Appendix 1) a conversion unit that converts, for a second power supply target different from the first power supply target, connected to an inverter used for supplying power to the first power supply target and an inverter control device for controlling the inverter, the second output requirement value into a first output requirement value required for the first power supply target, based on a voltage value of a voltage output from the inverter and a second output requirement value required for the second power supply target; an output unit that outputs the first output requirement value converted by the conversion unit to the inverter control device; A power command conversion device comprising:

[0081] (Appendix 2) the inverter control device stores first map data representing a correspondence relationship between the first output requirement value and a current command value for controlling the inverter; The conversion unit is a division unit that stores second map data expressed by an inverse function of the first map data, and calculates a current value by dividing the second output requirement value by the voltage value; an output requirement value acquisition unit that acquires the first output requirement value corresponding to the second output requirement value from the second map data; 2. The power command conversion device according to claim 1, comprising:

[0082] (Appendix 3) The first map data and the second map data are rewritable from an external device. 3. The power command converter of claim 2.

[0083] (Appendix 4) The conversion unit generates map data representing a correspondence relationship between the first output requirement value and the second output requirement value based on the second output requirement value and the voltage and current output from the inverter, and obtains the first output requirement value corresponding to the second output requirement value from the map data. 2. The power command converter of claim 1.

[0084] (Appendix 5) At least one of a fundamental wave voltage calculation unit that calculates a fundamental wave component of a voltage output from the inverter, a harmonic voltage calculation unit that calculates a harmonic component of the voltage, and a voltage frequency component calculation unit that calculates a frequency component of the voltage; a power command calculation unit that determines whether or not the second power supply object has been cut off by determining whether or not a degree of change in at least one of the fundamental wave component, the harmonic component, and the frequency component is equal to or greater than a predetermined threshold, and calculates a power command value that increases reactive power so as to prevent isolated operation of the inverter when it is determined that the second power supply object has been cut off; an adder that adds the second output request value and the power command value and outputs the sum to the converter; 5. The power command converting device according to any one of claims 1 to 4, comprising:

[0085] (Appendix 6) The first power supply target is a motor for driving a vehicle. 6. A power command conversion device according to any one of claims 1 to 5.

[0086] (Appendix 7) The second power supply target is a power grid device. 7. A power command conversion device according to any one of claims 1 to 6.

[0087] (Appendix 8) At least one processor for a second power supply object different from the first power supply object and connected to an inverter used for supplying power to the first power supply object and an inverter control device for controlling the inverter, based on a voltage value of a voltage output from the inverter and a second output request value required for the second power supply object, converting the second output request value into a first output request value required for the first power supply object; The converted first output requirement value is output to the inverter control device. The power command conversion method includes the steps of:

[0088] (Appendix 9) At least one processor has for a second power supply object different from the first power supply object and connected to an inverter used for supplying power to the first power supply object and an inverter control device for controlling the inverter, based on a voltage value of a voltage output from the inverter and a second output request value required for the second power supply object, converting the second output request value into a first output request value required for the first power supply object; The converted first output requirement value is output to the inverter control device. A power command conversion program that causes a process including the above to be executed. [Explanation of symbols]

[0089] 10 Inverter control system 20 Inverter 30, 30A inverter control device 31 Current command value acquisition unit 31A Map Data 40, 40A, 40B Power command conversion device 41 Torque command value acquisition unit 41A Map Data 42 Division part 43 Map data generation section 43A Map Data 44 Addition section 47A Power command conversion program 50 Power generation equipment 60 Grid connection device 70 Grid power equipment 80 Voltage Fluctuation Detector 81 Fundamental wave voltage calculation section 82 Harmonic voltage calculation section 83 Voltage frequency calculation section 84 Power command calculation section

Claims

1. A converter (20) that was used to supply power to a first power supply target, and a second power supply target (70) different from the first power supply target, connected to an inverter control device (30) for controlling the inverter. Based on the voltage value of the voltage output from the inverter and the second output requirement value required for the second power supply target, a conversion unit (41) that converts the second output requirement value into a first output requirement value required for the first power supply target, An output unit (41) that outputs the first output requirement value converted by the conversion unit to the inverter control device, Comprising, The inverter control device stores first map data representing the correspondence between the first output requirement value and a current command value for controlling the inverter, The conversion unit, A division unit (42) that stores second map data represented by the inverse function of the first map data and calculates a current value by dividing the second output requirement value by the voltage value, An output requirement value acquisition unit (41) that acquires the first output requirement value corresponding to the second output requirement value from the second map data, A power command conversion device (40) comprising.

2. The first map data and the second map data can be rewritten from an external device, The power command conversion device according to Claim 1.

3. At least one calculation unit including a fundamental wave voltage calculation unit (81) that calculates the fundamental wave component of the voltage output from the inverter, a harmonic voltage calculation unit (82) that calculates the harmonic component of the voltage, and a voltage frequency component calculation unit (83) that calculates the frequency component of the voltage, By determining whether the degree of change of at least one of the fundamental wave component, the harmonic component, and the frequency component is equal to or greater than a predetermined threshold value, it is determined whether the second power supply target is interrupted. When it is determined that the second power supply target is interrupted, a power command calculation unit (84) that calculates a power command value that increases reactive power so as to prevent the inverter from operating alone, An addition unit (44) that adds the second output requirement value and the power command value and outputs the result to the conversion unit, The power command conversion device according to Claim 1 comprising.

4. The first power supply target is a motor for driving a vehicle The power command conversion device according to Claim 1.

5. The second power supply target is a grid power device The power command conversion device according to any one of claims 1 to 4.

6. At least one processor For a second power supply target different from the first power supply target, which is connected to an inverter used for power supply to the first power supply target and an inverter control device for controlling the inverter, based on the voltage value of the voltage output from the inverter and the second output requirement value required for the second power supply target, convert the second output requirement value into the first output requirement value required for the first power supply target, Output the converted first output requirement value to the inverter control device Execute a process including The inverter control device stores first map data representing the correspondence between the first output requirement value and the current command value for controlling the inverter, The conversion is Store second map data represented by the inverse function of the first map data, divide the second output requirement value by the voltage value to calculate a current value, Obtain the first output requirement value corresponding to the second output requirement value from the second map data A power command conversion method including this.

7. Cause at least one processor to For a second power supply target different from the first power supply target, which is connected to an inverter used for power supply to the first power supply target and an inverter control device for controlling the inverter, based on the voltage value of the voltage output from the inverter and the second output requirement value required for the second power supply target, convert the second output requirement value into the first output requirement value required for the first power supply target, Output the converted first output requirement value to the inverter control device Execute a process including this, The inverter control device stores first map data representing the correspondence between the first output requirement value and the current command value for controlling the inverter, The conversion is Store second map data represented by the inverse function of the first map data, divide the second output requirement value by the voltage value to calculate a current value, Obtain the first output requirement value corresponding to the second output requirement value from the second map data A power command conversion program including this.

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