WO2005002037A1 - 電動機駆動システム - Google Patents
電動機駆動システム Download PDFInfo
- Publication number
- WO2005002037A1 WO2005002037A1 PCT/JP2003/008116 JP0308116W WO2005002037A1 WO 2005002037 A1 WO2005002037 A1 WO 2005002037A1 JP 0308116 W JP0308116 W JP 0308116W WO 2005002037 A1 WO2005002037 A1 WO 2005002037A1
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- WO
- WIPO (PCT)
- Prior art keywords
- power
- voltage
- distribution bus
- frequency
- common
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
- B63H21/17—Use of propulsion power plant or units on vessels the vessels being motor-driven by electric motor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H23/00—Transmitting power from propulsion power plant to propulsive elements
- B63H23/22—Transmitting power from propulsion power plant to propulsive elements with non-mechanical gearing
- B63H23/24—Transmitting power from propulsion power plant to propulsive elements with non-mechanical gearing electric
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/40—The network being an on-board power network, i.e. within a vehicle
- H02J2310/42—The network being an on-board power network, i.e. within a vehicle for ships or vessels
Definitions
- a plurality of generators powered by a mechanical power generator are provided.
- a power converter that is connected in parallel to a common distribution bus and that operates a plurality of motors that drive a load machine at a variable speed is related to a motor drive system that is connected in parallel to this common distribution bus.
- FIG. 10 is a configuration diagram showing a conventional electric motor drive system for electric propulsion of a ship shown in International Publication No. WO 02/10071 16 A1 pamphlet.
- the screws 33 to 36 are driven at variable speeds by the induction motors 23 to 27 via the rotating shafts 28 to 32, respectively.
- the induction motors 23 to 27 are respectively driven at variable speeds by the power converters 18 to 22, but the power required for the variable speed drive is supplied from the common distribution buses 12, 13 via the transformer 37. Supplied.
- the output terminals of the generators 6 to 11 driven by the diesel engines 1 to 5 are connected to the common distribution buses 12 and 13, respectively.
- 38 is the primary winding of the transformer 37, 39 and 41 are the secondary windings of the transformer 37, 42 and 43 are rectifiers, 44 is a capacitor, and 45 is an inverter. .
- the mechanical power output from the diesel engines 1 to 5 is converted into electric power by the generators 6 to 11, and the common distribution buses 12 and 13, the transformer 37 and the power converter 1 8 to 22, induction motor 23 to 27 Finally, it is used as mechanical power to operate the screws 33 to 36 at variable speeds via the rotating shafts 28 to 32.
- part of the mechanical power output by the diesel engines 1 to 5 is also supplied to other load equipment connected to the low-voltage distribution systems 16 and 17 via transformers 14 and 15. You.
- the electric propulsion system using an electric motor drive system has less vibration, is easier to adjust the screw rotation direction and rotation speed, and has higher efficiency than the conventional propulsion system that drives the screw directly by the diesel engine. There are advantages such as good. For this reason, the use of luxury passenger ships that emphasize riding comfort and icebreakers that repeat forward and backward traveling is increasing.
- the conventional motor drive system is configured as described above, if the diesel engine 1 fails during operation, the circuit breaker provided between the generator 6 and the common distribution bus 12 is opened. On the other hand, the load on the remaining four diesel engines 2 to 5 increases due to the cessation of the mechanical power supply from the diesel engine 1, and the rotational speed decreases. Along with this, the generator 7-11 The output voltage and, consequently, the amplitude and frequency of the common distribution buses 12 and 13 decrease. If the decrease in these amplitudes or frequencies falls below the preset lower limit, it is determined that an abnormality has occurred in the system, and the circuit breaker between the generators 7 to 11 and the common distribution buses 12 and 13 is connected. Be released. As a result, a problem of system down occurs in which supply of mechanical power to the screws 33 to 36 is stopped.
- the circuit breaker provided between the transformer 37 and the common distribution bus 12 is opened.
- the load on the diesel engines 1 to 5 is reduced and the rotational speed is increased because the supply of mechanical power to the screw 33 is interrupted.
- the output voltage of the generator 6 11 and the amplitude and frequency of the voltage of the common distribution buses 12 and 13 increase. If the rise in these amplitudes or frequencies exceeds a preset upper limit, it is determined that an abnormality has occurred in the system, and the power supply between the generators ⁇ and 11 and the common distribution buses 12 and 13 is shut off.
- the container is opened. As a result, a system down problem occurs in which the supply of mechanical power to the screws 33 to 36 is stopped.
- rotation speed control is performed by adjusting fuel supply (so-called governor control), and in a generator, output voltage amplitude control is performed by excitation current control.
- governor control the frequency fluctuation of the voltage of the common distribution buses 11 and 12 is suppressed by governor control of the diesel engine, and the amplitude fluctuation is suppressed by the excitation current control of the generator.
- the response speed of the governor control and the excitation current control is slow in the order of seconds, so that the frequency fluctuation and amplitude fluctuation of the common distribution bus voltage that occurs when at least one of the diesel engine and the generator fails. It is difficult to control the level to a level that does not cause any problems, and problems with system down are likely to occur.
- the present invention has been made in order to solve the above-described problems.
- the response speed is increased, and the frequency fluctuation and the amplitude fluctuation of the common distribution bus voltage are reduced to a level where there is no problem that a system down can be avoided.
- the purpose is to control. Disclosure of the invention
- An electric motor drive system includes: a mechanical power generator that outputs mechanical power; a plurality of generators that are driven by the mechanical power generator and generate AC power; and output terminals of the plurality of generators. Are connected in parallel, an input terminal is connected to the common distribution bus, and a plurality of power converters that output AC power of variable amplitude and variable frequency are connected to the power converter. , Each having a plurality of electric motors for driving a load machine.
- each of the power converters detects the frequency of the common distribution bus, and in response to a decrease in the detected frequency from a predetermined value, the upper limit value of the current command value of the converter of each of the power converters.
- the frequency control means for controlling the frequency of the common distribution bus to a predetermined value by controlling the active power exchanged between each of the power conversion devices and the common distribution bus is reduced.
- each of the power converters detects the output DC voltage of the comparator, and corrects and reduces the speed control command value of each of the electric motors according to a decrease in the detected DC voltage from a predetermined value.
- DC voltage control means for controlling the output DC voltage to a predetermined value by controlling the active power exchanged between them.
- the response speed can be increased, and the frequency fluctuation and amplitude fluctuation of the common distribution bus voltage can be suppressed to a level that does not cause a problem of system down.
- the frequency of the common distribution bus decreases, the electric power consumed by the load can be suppressed by reducing the rotation speed of the motor, so that the DC voltage can be suppressed from decreasing and the frequency of the common distribution bus can be increased to a predetermined value or more. Can be maintained.
- a motor drive system includes a mechanical power generator that outputs mechanical power, a plurality of generators that are driven by the mechanical power generator and generate AC power, and a plurality of generators that generate AC power.
- a common distribution bus having output terminals connected in parallel; a plurality of power converters having input terminals connected to the common distribution bus and outputting AC power of variable amplitude and variable frequency; and
- the present invention relates to a motor having a plurality of electric motors, each of which is connected and drives a load machine.
- each of the power converters detects the frequency of the common distribution bus, and in response to a decrease in the detected frequency from a predetermined value, the upper limit value of the current command value of the converter of each of the power converters.
- Frequency control means for controlling the frequency of the common power distribution bus to a predetermined value by controlling the active power exchanged between each of the power conversion devices and the common power distribution bus.
- Each of the power converters detects a voltage of the common distribution bus, and detects a voltage between the power converter and the common distribution bus in accordance with a deviation between the detected voltage and a reference voltage of the common distribution bus.
- Voltage control means for controlling the voltage of the common distribution bus to the above-mentioned reference voltage by controlling the reactive power exchanged in the step (a).
- each of the power converters detects the output DC voltage of the compressor and reduces and corrects the command value of the speed control of each of the electric motors according to a decrease in the detected DC voltage from a predetermined value.
- DC voltage control means is provided for controlling the active power exchanged between each of the power converters and each of the electric motors so that the output DC voltage becomes a predetermined value.
- the response speed can be increased, and the frequency fluctuation and amplitude fluctuation of the common distribution bus voltage can be suppressed to a level that does not cause a problem of system down. Then, the frequency of the common distribution bus is suppressed and maintained at a predetermined value, and the voltage of the common distribution bus is maintained, so that the operation of the motor can be more stably realized.
- FIG. 1 is a configuration diagram showing an electric motor drive system according to Embodiment 1 of the present invention.
- FIG. 2 is a timing chart showing the operating conditions of the bus voltage, the bus frequency, and the load current in the first embodiment.
- FIG. 3 is a configuration diagram showing a motor drive system according to Embodiment 2.o
- FIG. 4 is a configuration diagram showing a motor drive system according to a third embodiment.
- FIG. 5 is a configuration diagram showing a motor drive system according to a fourth embodiment.
- FIG. 6 is a timing chart showing operation states of the bus voltage, the bus frequency, and the load current when it is difficult to suppress the bus voltage fluctuation.
- FIG. 7 is a timing chart showing the operating conditions of bus voltage, bus frequency, and load current when Embodiment 4 is applied.
- FIG. 8 is a configuration diagram showing a motor drive system according to a fifth embodiment.
- FIG. 9 is a configuration diagram showing a motor drive system according to a sixth embodiment.
- FIG. 10 is a configuration diagram showing a conventional motor drive system. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is a configuration diagram showing an electric motor drive system according to Embodiment 1 of the present invention.
- a plurality of generators 6 to 11 are driven by diesel engines (mechanical power generators) 1 to 5 which output mechanical power, respectively, via breakers (not shown).
- the generated power is connected in parallel to the common distribution bus 12 and supplied to the common distribution bus 12.
- the plurality of induction motors 23 to 27 each drive a screw (loading machine) 33 to 36 connected to its rotary shaft 28 to 32.
- the induction motors 23 to 27 are provided with respective speed detectors 49 to 52.
- the induction motor 23 is connected to the common distribution bus 12 via a transformer 46 and a motor control device 62.
- a circuit breaker (not shown) is connected between the common distribution bus 12 and the transformer 46.
- the induction motors 24 to 27 are similarly connected to the common distribution bus 12 via circuit breakers, transformers, and motor control devices 63 to 65.
- the motor control device 62 has a power conversion device 61, and its main circuit 47 can control the reactive power and active power of the input power.
- the main circuit 47 includes, for example, a high power factor converter 81 that converts AC power into DC power, a smoothing capacitor 82 that smoothes the converted DC power, and a motor 2 that converts DC power into AC power.
- a self-excited inverter that drives 3 8 It is composed of a conversion device of the evening-invar overnight system (DC link system). It should be noted that the conversion device may be constituted by an AC-AC conversion system using a matrix converter.
- Reference numeral 48 denotes a frequency detection circuit that detects a frequency from the voltage of the common distribution bus 12.
- 53 is a DC voltage detector for detecting the DC voltage of the converter 81 (the DC voltage of the smoothing capacitor 82).
- Reference numeral 54 denotes a DC voltage control circuit that receives the DC voltage detected by the DC voltage detector 53 and controls the DC voltage of the converter 81 to the predetermined value based on a deviation from a predetermined value.
- 55 is to compare the feedback frequency, which is the detection value of the frequency detection circuit 48, with a predetermined value (for example, in the case of FIG.
- Reference numeral 56 denotes a converter control circuit which drives the comparator 81 of the main circuit 47 with the output of the current control circuit 55.
- the DC voltage detector 53, the DC voltage control circuit 54, the frequency detection circuit 48, the current control circuit 55 and the converter control circuit 56 constitute a frequency control means.
- Reference numeral 57 denotes a speed command setting circuit for setting or receiving a speed command value according to an external command.
- 5 8 calculates the feedback speed from the signal of the speed detector 49, receives the speed command value output from the speed command setting circuit 57, calculates the deviation between this speed command value and the feedback speed, This is a speed control circuit that calculates the current command value of the inverter 83 of the main circuit 47 so as to eliminate this deviation.
- the speed control circuit 58 further receives a detected DC voltage which is an output of the DC voltage detector 53, and when the detected DC voltage falls from a predetermined value, the speed control circuit 58 outputs an output of the speed command setting circuit 57.
- Reference numeral 59 denotes a control circuit which receives the output of the speed control circuit 58 and controls the main circuit 47 of the main circuit 47 having a control function of controlling the speed of the motor 23.
- These speed command setting circuit 57, speed detector 49, speed control circuit 58, DC voltage detector 53 and control circuit 59 constitute DC voltage control means.
- Reference numeral 60 denotes a control device that controls the main circuit 47 of the power conversion device 61.
- 63 to 65 are motor control devices having the same control functions as the motor control device 62. Part of the power from the common distribution bus 12 is also supplied to other load equipment connected to the low-voltage distribution systems 16 and 17 via the transformers 14 and 15.
- the power generation system generates power so as to generate an AC power output of a predetermined frequency and voltage. For example, if the power consumed by the load increases within the rated range of the power generation system, the diesel engine (motor) 1 to 5
- the frequency and voltage of the common power distribution bus 12 are maintained at predetermined values by increasing the output of the generators and making the output power of the generators 6 ′ to 11 equal to the power consumption.
- the motor control device 62 controls the driving of the motor 23 so that the rotation speed of the motor 23 becomes the speed command value. It receives AC power from the motor control device 62 and the transformer 46, receives an external speed command value, and drives the motor 23 based on the speed command value output from the speed command setting circuit 57. Variable amplitude 'Outputs AC power with variable frequency.
- the active power control circuit 55 of the high power factor converter increases the current to a current value corresponding to the active power necessary to maintain the frequency of the common distribution bus 12 detected by the frequency detection circuit 48 at a predetermined value.
- the output command value of the current control circuit 55 of the power factor converter is corrected and subtracted, and is given to the converter control circuit 56 as a control command.
- the control circuit 56 for the high power factor comparator is designed to ensure that the DC voltage is the desired value. Control. Specifically, the DC voltage of the converter 81 detected by the DC voltage detector 53 is compared with a predetermined value (voltage value) by the DC voltage control circuit 54, and the current command value is set so that the deviation is eliminated. Calculate and output. The current control circuit 55 drives and controls the converter control circuit 56 so that the current command value is obtained. At this time, if the frequency of the common distribution bus 12 detected by the frequency detection circuit 48 becomes lower than a predetermined value, the upper limit of the current command value of the DC voltage control circuit 54 is increased in accordance with the decrease from the predetermined value. Calculate to reduce the limit value and perform effective current control.
- the frequency of the common power distribution bus is controlled to a predetermined value by controlling the active power exchanged between the power converter and the common power distribution bus.
- the DC voltage decreases.
- the control circuit 59 of the inverter 23 controls the driving of the motor 23 so that the rotation speed of the motor 23 becomes the speed command value.
- the feedback speed obtained by calculating the rotation speed detected by the speed detector 49 by the speed control circuit 58 is compared with the speed command value, and the current command value is calculated so as to eliminate the deviation.
- Driving the main circuit 47 is controlled to a predetermined value by controlling the active power exchanged between the power converter and the common power distribution bus.
- the calculation is performed so as to decrease the speed command value of the speed command setting circuit 57 in accordance with the decrease from the predetermined value. Then, the current command value of the electric motor 23 is given to the control circuit 59 for the night.
- the output DC voltage of converter 81 becomes a predetermined value.
- the load power consumption characteristics of the wind-hydraulic applied machine is such that the power consumption increases and changes with the cube of the rotation speed.
- the power consumed by the load can be suppressed by reducing the rotation speed of the electric motor 23 according to the decrease in the frequency of the common distribution bus 12. Therefore, the DC voltage can be reduced
- the frequency of the common distribution bus 12 can be secondarily maintained at a predetermined value or more.
- Figure 2 shows this, and the frequency drops after an overload, but this is maintained at a predetermined value to achieve continuous operation.
- the bus voltage on the vertical axis represents the rated bus voltage as 1.
- the bus frequency [Hz] indicates when the bus rated frequency is 50 Hz.
- the load current is expressed by setting the rated load power to 1.
- the horizontal axis represents time [sec].
- FIG. 3 is a configuration diagram showing a motor drive system according to a second embodiment.
- the same reference numerals as in FIG. 1 denote the same or corresponding components as those in FIG.
- the motor control device 71 has a DC voltage control means for outputting to the inverter 83 in the power conversion device 70.
- This DC voltage control means includes a speed command setting circuit 57, a speed detector 49, a speed control circuit 66, a DC voltage detector 53, a current control circuit 67, and a control circuit 68. . 69 is a control device.
- the motors 24 to 27 are similarly connected to the common distribution bus 12 via circuit breakers (not shown), transformers, and motor control devices 72 to 74.
- the current control circuit 67 receives the DC voltage detected by the DC voltage detector 53, and when the DC voltage decreases from the predetermined value, the current of the current control circuit 67 changes according to the decrease from the predetermined value. Give a command to lower the upper limit of the command value.
- the speed control circuit 66 calculates the feedback speed from the signal of the speed detector 49, receives the speed command value output from the speed command setting circuit 57, and calculates the deviation between the speed command value and the feedback speed. Calculation is performed, and a current command value is given to the current control circuit 67 so as to eliminate this deviation.
- the current control circuit 67 sends the current command value obtained by the speed control circuit 66 directly to the control circuit 68 of the main circuit 47. Give If the DC voltage drops, control is performed to limit the current command value so that the fluctuation of the DC voltage is within a predetermined value (voltage value).
- the bus frequency of the common distribution bus 12 is detected, and the power consumption (current) of the motor 23 of the direct power converter is reduced. Since power control can be performed, a decrease in the frequency of the common distribution bus 12 can be suppressed, the operation of the motor can be continued, and the motor can be operated more stably.
- FIG. 4 is a configuration diagram showing a motor drive system according to a third embodiment.
- the same reference numerals as those in FIG. 1 denote the same or corresponding components as those in FIG.
- the frequency of the common distribution bus 12 is collectively detected by the frequency detection circuit 91, and the detected feedback frequency is supplied to the control devices 92 to 95 of each motor.
- Other configurations are the same as those in the first embodiment.
- the frequency of the common distribution bus 12 is detected collectively and supplied to the control devices 92 to 95 of the respective motors, control instability due to variations in characteristics of individual frequency detection circuits
- the frequency of the common distribution bus 12 can be more stably maintained at a predetermined value or more.
- the frequency of the common distribution bus 12 is detected collectively by the frequency detection circuit 91, and the detected feedback frequency is sent to the control device of each motor. You may make it supply. By doing so, also in the second embodiment, control instability due to variations in characteristics of individual frequency detection circuits is prevented, and the frequency of the common distribution bus 12 is more stably set to a predetermined value or more. Can be maintained.
- FIG. 5 is a configuration diagram showing a motor drive system according to Embodiment 4. .
- the same reference numerals as in FIG. 1 denote the same or corresponding components as those in FIG.
- the motor control device 81 detects the bus voltage of the common distribution bus 12 with a voltage detector 75 and calculates the deviation between the detected voltage and the reference voltage of the common distribution bus 12. Accordingly, the reactive power command value generated by power conversion device 80 is calculated so as to eliminate this deviation, and reactive power command circuit 7 6 is output to converter control circuit 78 of power conversion device 80. It has. 79 is a control device.
- the reactive power command circuit 76 detects the voltage of the common distribution bus 12 with a voltage detector 75 and maintains the detected voltage at the reference voltage of the common distribution bus 12 set by the voltage setting unit 77. A reactive power output command value corresponding to the reactive power required for the operation is calculated and given to the converter control circuit 78 of the power converter 80.
- the voltage detector 75, the voltage setting device 77, the reactive power command circuit 76, and the converter control circuit 78 constitute a voltage control means.
- the DC voltage detector 53, the DC voltage control circuit 54, the frequency detection circuit 48, the current control circuit 55, and the frequency control are performed by the control circuit 78 of the comparator. Means.
- the speed command setting circuit 57, the speed detector 49, the speed control circuit 58, the DC voltage detector 53, and the control circuit 59 constitute a DC voltage control means.
- the other motor control devices 82 to 84 have the same configuration as the motor control device 81. If the voltage fluctuation that occurs when an overload occurs can be suppressed by the AC voltage control circuit (excitation current control circuit, etc.) normally provided in the generator system, the power consumption is suppressed and the frequency is reduced as shown in Fig. 3. Can be continued by maintaining the voltage at a predetermined value, but if it is difficult to suppress voltage fluctuations with the AC voltage control circuit provided in the power generation system, the bus voltage fluctuations gradually increase as shown in Fig. 6. And the power generation system will eventually stop.
- Figure 6 shows the operation of bus voltage, bus frequency, and load current when it is difficult to suppress bus voltage fluctuations. It is a timing chart which shows a situation.
- the voltage of common power distribution bus 12 is detected, and the output of reactive power of power converter 80 is controlled, so that the voltage of common power distribution bus 12 can be maintained at a predetermined value.
- Figure 7 illustrates this.
- Fig. 7 is a timing chart showing the operating conditions of the bus voltage, bus frequency, and load current when Embodiment 4 is applied. The frequency of the common distribution bus 12 is suppressed and maintained below the specified value, and the voltage of the common distribution bus 12 is maintained at the reference voltage. Form 5.
- FIG. 8 is a configuration diagram showing a motor drive system according to a fifth embodiment.
- the components denoted by the same reference numerals as those in FIG. 3 or 5 indicate the same components as those in FIG. 3 or FIG.
- the motor control device 87 detects the bus voltage of the common power distribution bus 12 with the voltage detector 75 in addition to the configuration of the second embodiment (FIG. 3). According to the deviation between the detected voltage and the reference voltage of the common distribution bus 12, a reactive power command value corresponding to the required reactive power is calculated so as to eliminate this deviation, and the power converter 8 6 And a reactive power command circuit 76 output to the control circuit 78 of the converter. 8 5 is a control device.
- These voltage detector 75, voltage setting device 77, reactive power command circuit 76 and converter control circuit 78 constitute voltage control means.
- the DC voltage detector 53, the DC voltage control circuit 54, the frequency detection circuit 48, the current control circuit 55, and the control circuit 78 Is composed. Further, as in the second embodiment, the speed command setting circuit 57, the speed detector 49, the speed control circuit 66, the DC voltage detector 53, the current control circuit 67, and the control circuit 68 control the DC voltage. means Is composed.
- the other motor control devices 88-90 have the same configuration as the motor control device 87.
- the bus voltage of the common distribution line 12 is detected and the output of the reactive power is controlled, the voltage of the common distribution line 12 is maintained at a predetermined value.
- the frequency of the common power distribution bus 12 is suppressed and maintained from falling below a predetermined value, and the bus voltage of the common power distribution bus 12 is maintained at a predetermined value even when driving a constant torque load device.
- the operation of the motor can be continued more stably.
- FIG. 9 is a structural diagram showing a motor driving system according to Embodiment 6.
- the components denoted by the same reference numerals as those in FIG. 5 indicate the same or corresponding components as those in FIG.
- the frequency of the common power distribution bus 12 is detected by the frequency detection circuit 91 in a lump, and the detected feedback frequency is determined by the control device 101 to 1 of each motor. We supply each to 04. Further, the bus voltage of the common distribution bus 12 is collectively detected by the voltage detector 100, and the detected feedback bus voltage is supplied to the control devices 101 to 104 of the respective motors. Others are the same as in Embodiment 4 (FIG. 5).
- the effective current control circuit 55 of the comparator when the bus frequency of the common distribution bus 12 detected by the frequency detection circuit 91 falls below a predetermined value, reduces the current command value to reduce the high power factor Commands are given to the control circuit 78.
- the reactive power command circuit 76 detects the bus voltage of the common distribution bus 12 with the voltage detector 100, and compares the detected voltage with the reference voltage of the common distribution bus 12 set by the voltage setting unit 77. A reactive power output command value corresponding to the reactive power required for maintaining is calculated and given to converter control circuit 78 of power converter 80.
- the common frequency detecting circuit 91 detects the frequency of the common power distribution bus 12 collectively. The frequency may be supplied to the control device of each motor individually. Furthermore, instead of the voltage detector 75, the voltage detector 100 detects the bus voltage of the common distribution bus 12 in a lump, and supplies the detected feedback bus voltage to the control device of each motor. May be. Industrial applicability ''
- the present invention is suitable for use in a motor drive system for marine electric propulsion and a motor drive system for an LNG plant.
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- Control Of Multiple Motors (AREA)
Abstract
Description
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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JP2005503216A JP4440879B2 (ja) | 2003-06-26 | 2003-06-26 | 電動機駆動システム |
EP03736260A EP1638199A4 (en) | 2003-06-26 | 2003-06-26 | DRIVE SYSTEM FOR MOTORS |
PCT/JP2003/008116 WO2005002037A1 (ja) | 2003-06-26 | 2003-06-26 | 電動機駆動システム |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2003/008116 WO2005002037A1 (ja) | 2003-06-26 | 2003-06-26 | 電動機駆動システム |
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WO2005002037A1 true WO2005002037A1 (ja) | 2005-01-06 |
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PCT/JP2003/008116 WO2005002037A1 (ja) | 2003-06-26 | 2003-06-26 | 電動機駆動システム |
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JP (1) | JP4440879B2 (ja) |
WO (1) | WO2005002037A1 (ja) |
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CN103298692A (zh) * | 2010-10-14 | 2013-09-11 | Ge能源能量变换技术有限公司 | 船舶推进系统 |
US12027994B2 (en) | 2020-12-29 | 2024-07-02 | Hamilton Sundstrand Corporation | Distributed control architecture for motor drives |
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GB2445382B (en) * | 2007-01-06 | 2011-04-13 | Converteam Ltd | Marine vessel power systems comprising mid-bus transformers positioned between sections of a busbar |
GB2449119B (en) † | 2007-05-11 | 2012-02-29 | Converteam Technology Ltd | Power converters |
FI121644B (fi) * | 2008-03-03 | 2011-02-15 | Waertsilae Finland Oy | Värähtelyn vaimennusjärjestely |
DE102016006431A1 (de) * | 2016-05-31 | 2017-11-30 | Wilo Se | Verfahren zur Verbesserung der Qualität elektrischer Verteilnetze |
CN113422380B (zh) * | 2021-07-29 | 2021-11-16 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | 直流多馈入系统和电网系统 |
KR102663379B1 (ko) * | 2023-08-11 | 2024-05-07 | 주식회사 파로스마린 | 수소 연료전지가 탑재된 선외기용 림구동 추진기 및 그 제어방법 |
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JPH04200296A (ja) * | 1990-11-29 | 1992-07-21 | Toshiba Corp | 船舶推進用電源装置 |
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EP0982828A2 (de) | 1998-08-19 | 2000-03-01 | Siemens Aktiengesellschaft | Verfahren und Vorrichtung zur Blindleistungskompensation in Bordnetzen |
JP2000069605A (ja) * | 1998-08-20 | 2000-03-03 | Fuji Electric Co Ltd | 電気推進装置の制御方法 |
WO2001000485A1 (de) * | 1999-06-24 | 2001-01-04 | Siemens Aktiengesellschaft | Antriebs- und fahrsystem für schiffe |
WO2002100716A1 (de) | 2001-06-11 | 2002-12-19 | Siemens Aktiengesellschaft | Schiffsantriebssystem mit vermindertem bordnetzklirrfaktor |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3420162B2 (ja) * | 2000-03-23 | 2003-06-23 | 西芝電機株式会社 | 発電設備の系統連系保護装置 |
-
2003
- 2003-06-26 JP JP2005503216A patent/JP4440879B2/ja not_active Expired - Fee Related
- 2003-06-26 WO PCT/JP2003/008116 patent/WO2005002037A1/ja active Application Filing
- 2003-06-26 EP EP03736260A patent/EP1638199A4/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH04200296A (ja) * | 1990-11-29 | 1992-07-21 | Toshiba Corp | 船舶推進用電源装置 |
JPH0730600U (ja) * | 1993-11-05 | 1995-06-06 | 西芝電機株式会社 | 主機軸駆動発電装置の電圧制御装置 |
EP0982828A2 (de) | 1998-08-19 | 2000-03-01 | Siemens Aktiengesellschaft | Verfahren und Vorrichtung zur Blindleistungskompensation in Bordnetzen |
JP2000069605A (ja) * | 1998-08-20 | 2000-03-03 | Fuji Electric Co Ltd | 電気推進装置の制御方法 |
WO2001000485A1 (de) * | 1999-06-24 | 2001-01-04 | Siemens Aktiengesellschaft | Antriebs- und fahrsystem für schiffe |
WO2002100716A1 (de) | 2001-06-11 | 2002-12-19 | Siemens Aktiengesellschaft | Schiffsantriebssystem mit vermindertem bordnetzklirrfaktor |
Non-Patent Citations (1)
Title |
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See also references of EP1638199A4 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103298692A (zh) * | 2010-10-14 | 2013-09-11 | Ge能源能量变换技术有限公司 | 船舶推进系统 |
US9941772B2 (en) | 2010-10-14 | 2018-04-10 | Ge Energy Power Conversion Technology Ltd. | Marine propulsion systems |
US12027994B2 (en) | 2020-12-29 | 2024-07-02 | Hamilton Sundstrand Corporation | Distributed control architecture for motor drives |
Also Published As
Publication number | Publication date |
---|---|
JP4440879B2 (ja) | 2010-03-24 |
JPWO2005002037A1 (ja) | 2006-08-10 |
EP1638199A1 (en) | 2006-03-22 |
EP1638199A4 (en) | 2011-07-06 |
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