WO2022009794A1 - Système de conversion de puissance, son procédé de commande et véhicule ferroviaire équipé de celui-ci - Google Patents

Système de conversion de puissance, son procédé de commande et véhicule ferroviaire équipé de celui-ci Download PDF

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Publication number
WO2022009794A1
WO2022009794A1 PCT/JP2021/025122 JP2021025122W WO2022009794A1 WO 2022009794 A1 WO2022009794 A1 WO 2022009794A1 JP 2021025122 W JP2021025122 W JP 2021025122W WO 2022009794 A1 WO2022009794 A1 WO 2022009794A1
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Prior art keywords
opening means
power
contactor
storage battery
overhead wire
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PCT/JP2021/025122
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English (en)
Japanese (ja)
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正登 安東
健志 篠宮
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株式会社日立製作所
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Publication of WO2022009794A1 publication Critical patent/WO2022009794A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L13/00—Electric propulsion for monorail vehicles, suspension vehicles or rack railways; Magnetic suspension or levitation for vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/53—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells in combination with an external power supply, e.g. from overhead contact lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

Definitions

  • the present invention relates to a power conversion system that also uses electric power from a storage battery, a control method of the system, and a railroad vehicle equipped with the system.
  • the electric power for driving the vehicle in the railway drive system is supplied from the overhead line. Since the power of the overhead line is supplied from the substation, if an accident occurs at the substation, the overhead line will be cut off. Therefore, when the overhead line fails, electric power cannot be supplied to the motor drive inverter device, and the vehicle cannot move.
  • storage batteries for emergency driving are being installed in vehicles for the purpose of moving to the nearest station in the event of an overhead line power outage.
  • the storage battery can absorb the regenerative power generated when the vehicle brakes, which can contribute to energy saving.
  • the voltage of the overhead line and the voltage of the storage battery may differ.
  • the charge / discharge of the storage battery is controlled by converting DC-DC power using a chopper device. That is, the chopper device is connected between the overhead wire and the storage battery.
  • the chopper device controls the charge / discharge power by the switching operation using the semiconductor element, it may accidentally fail.
  • the chopper device fails, the storage battery cannot be charged and discharged, so that the vehicle cannot run in an emergency.
  • Patent Document 1 discloses the following techniques as a technique for dealing with this problem. That is, "a one- or multi-phase bidirectional chopper circuit having a first external connection portion, a second external connection portion, a high voltage terminal, and a low voltage terminal, and a storage battery device in which the main circuit is connected to the low voltage side terminal. , The first contactor provided in the path for electrically connecting the high voltage terminal and the first external connection portion, and the path for electrically connecting the main circuit of the storage battery device and the low voltage side terminal.
  • the second contactor, the third contactor provided in the path for electrically connecting the main circuit of the storage battery device and the first external connection portion, and the main circuit of the storage battery device and the second external connection portion are electrically connected. It is a technique characterized in that it is provided with a fourth contactor provided in a path connected to.
  • Patent Document 1 makes it possible to supply electric power from a storage battery to a power conversion device (inverter device) without going through a chopper device during emergency driving, but as will be described later, a contact device to be connected. There is a problem that an excessive current flows in the storage battery at the time of switching, and the life of the storage battery or the contact device is shortened.
  • the power conversion system transfers DC power from the overhead wire via the first opening means, the second opening means, and the first filter reactor.
  • An inverter device that converts AC power to drive a motor, and DC power converted from overhead wire to DC via a first opening means, a third opening means, and a second filter reactor, and then via a third reactor. It is provided with a chopper device for controlling the electric power of the storage battery, a first contact device connected between the chopper device and the storage battery, and a second contact device connected between the first opening means and the storage battery. It is characterized in that it controls the opening and closing of the first to third opening means and the opening and closing of the first and second contactors in response to the failure detection of the chopper device and the power failure detection of the overhead wire.
  • FIG. 1 shows the schematic structure of the railroad vehicle which concerns on this invention. It is a figure which shows the circuit structure of the power conversion system which concerns on Example 1 of this invention. It is a figure which shows the timing chart at the start of an emergency run. It is a figure which shows the operation flowchart of the power conversion system which concerns on Example 1.
  • FIG. It is a figure which shows the timing chart of the power conversion system which concerns on Example 1.
  • FIG. It is a figure which shows the circuit structure of the power conversion system which concerns on Example 2 of this invention. It is a figure which shows the circuit structure of the power conversion system which concerns on Example 3 of this invention.
  • FIG. 1 is a diagram showing a schematic configuration of a railway vehicle according to the present invention.
  • electric power is supplied from the overhead wire 1 to the vehicle 8 via the current collector 7.
  • the electrical components for driving the railway vehicle according to the first embodiment are an inverter device 6, a chopper device 9, a contactor box 10, a filter reactor box 15, and a storage battery 20.
  • each electrical component is shown in the form of a separate box in FIG. 1, a part or all of the electrical components may be stored in an integrated box to increase the mounting density.
  • the voltage value of the overhead wire 1 is DC 600V, DC 750V, DC 1500V, DC 3000V, or the like.
  • FIG. 2 is a diagram showing a circuit configuration of the power conversion system according to the first embodiment of the present invention.
  • the electric power conversion system according to the first embodiment two systems, a system for driving the electric motor 5 and a system for controlling the electric power of the storage battery 20, are mounted.
  • the configuration of the power conversion system according to the first embodiment will be described below.
  • the system for driving the motor 5 drives the motor 5 by converting the DC power supplied from the overhead wire 1 into AC power via the circuit breaker 11, the contactor 14a, the filter reactor 15a, and the inverter device 6.
  • the circuit breaker 11 and the contactor 14a are used as opening means.
  • the inverter device 6 is composed of a discharge circuit composed of a filter capacitor 18a, a resistor 16a and a switching element 17a, a logic unit (not shown) that generates a gate command for the switching elements Q1 to Q6 and the switching elements Q1 to Q6. ing.
  • the electric motor 5 may be either an induction motor or a permanent magnet synchronous motor.
  • an induction motor a plurality of induction motors can be driven by one inverter device, and in the case of a permanent magnet synchronous motor, one permanent magnet synchronous motor is driven by one inverter device.
  • the motor 5 becomes a generator.
  • the regenerative power generated by the electric motor 5 returns to the overhead wire 1 via the inverter device 6, the filter reactor 15a, the contactor 14a, and the circuit breaker 11. This regenerative power is consumed as power running power of another vehicle via the overhead wire 1.
  • the system that controls the power of the storage battery 20 converts the DC power supplied from the overhead wire 1 into DC power via the circuit breaker 11, the contactor 14b, the filter reactor 15b, the chopper device 9, and the contactor 19, and raises and lowers the DC power.
  • the storage battery 20 is charged via the pressure reactor 15c.
  • a contactor is used as the opening means 14b.
  • the chopper device 9 is composed of a discharge circuit composed of a filter capacitor 18b, a resistor 16b and a switching element 17b, switching elements Q7 and Q8, and a logic unit (not shown) that generates a gate command for these switching elements Q7 and Q8. Has been done.
  • the storage battery 20 can be charged not only by the electric power from the overhead wire 1 but also by the regenerative electric power of the electric motor 5.
  • the contactor 19 When discharging the electric power of the storage battery 20, the contactor 19, the buck-boost reactor 15c, the chopper device 9, the filter reactor 15b, and the contactor 14b are used.
  • the electric power from the storage battery 20 is converted into AC electric power by the inverter device 6 to drive the electric motor 5.
  • the low potential side of the inverter device 6 and the chopper device 9 is connected to the rail 2 via the wheel 3. Further, the electric motor 5 is mounted on the bogie 4, and the bogie 4 supports the vehicle 8.
  • the switching elements Q1 to Q6 of the inverter device 6 include diodes in antiparallel.
  • Switching elements Q1 and Q2 are connected in series to form a U phase
  • switching elements Q3 and Q4 are connected in series to form a V phase
  • switching elements Q5 and Q6 are connected in series to form a W phase.
  • the switching elements Q7 and Q8 of the chopper device 9 are connected in series, and both have diodes in antiparallel.
  • the antiparallel diode included in the switching element Q17a of the inverter device 6 and the switching element 17b of the chopper device 9 may be omitted.
  • each switching element requires a counter-parallel diode, but when the switching elements have a body diode such as a MOSFET, the anti-parallel diode is not connected to each switching element.
  • the body diode of the MOSFET itself may be used.
  • a 2in1 package mounted in the same package may be used as the two switching elements (for example, Q1 and Q2) connected in series.
  • a voltage control type switching element such as a MOSFET or an IGBT or a current control type switching element such as a thyristor
  • a current control type switching element such as a thyristor
  • the semiconductor material of the switching element and the antiparallel diode Si (silicon), SiC (silicon carbide) or GaN (gallium nitride), which is a semiconductor having a wider bandgap than Si, may be used.
  • the wide bandgap semiconductor can reduce the generated loss as compared with Si, the inverter device 6 and the chopper device 9 can be miniaturized.
  • PWM Pulse Width Modulation
  • the initial charge of the filter capacitor 18a is performed using the contactor 12a and the resistor 13a, which are charging circuits. With the contactor 14a open, the contactor 12a is turned on, and initial charging is performed via the resistor 13a.
  • the filter capacitor 18a and the filter reactor 15a form a filter circuit to reduce the noise current flowing from the inverter device 6 to the overhead wire 1.
  • the resistor 16a and the switching element 17a form a discharge circuit, and by turning on the switching element 17a, the energy stored in the filter capacitor 18a is consumed by the resistor 16a, and the voltage of the filter capacitor 18a is set to 0V. Discharge up to.
  • the switching elements Q7 and Q8 of the chopper device 9 are controlled so that the input / output power of the storage battery 20 becomes a desired value. For example, assuming that the voltage of the overhead wire 1 is DC 1500V and the voltage of the storage battery 20 is 800V, the chopper device 9 steps down the voltage of the overhead wire 1 (1500V) to the voltage of the storage battery 20 (800V) when charging the storage battery 20. It functions as a step-down chopper, and the buck-boost reactor 15c functions as a step-down reactor.
  • the chopper device 9 functions as a boost chopper that boosts the voltage (800V) of the storage battery 20 to the voltage (1500V) of the overhead wire 1, and the buck-boost reactor 15c functions as a boost reactor. ..
  • the voltage of the overhead wire 1 is ideally a constant DC voltage, but the voltage fluctuates according to the number of vehicles connected to the overhead wire 1. Even in this case, the storage battery 20 can be charged by controlling the chopper device 9.
  • the switching operation of the switching elements Q7 and Q8 pulsed AC power is output from the filter capacitor 18b.
  • the initial charge of the filter capacitor 18b is performed by using the contactor 12b and the resistor 13b, which are charging circuits. That is, with the contactor 14b open, the contactor 12b is turned on and initial charging is performed via the resistor 13b.
  • the filter capacitor 18b and the filter reactor 15b form a filter circuit to reduce the noise current flowing from the chopper device 9 to the overhead wire 1. Further, the resistor 16b and the switching element 17b form a discharge circuit, and by turning on the switching element 17b, the energy stored in the filter capacitor 18b is consumed by the resistor 16b, and the voltage of the filter capacitor 18b is transferred to the overhead wire. It discharges to a voltage of 1 or less (for example, 0V).
  • the function of the chopper device 9 will be described.
  • the electric motor 5 operates as a generator, and the regenerative power generated thereby is consumed as power running power of another vehicle via the overhead wire 1.
  • electric energy can be efficiently used and energy can be saved.
  • the regenerative power cannot be returned to the overhead line 1, and if it is converted to heat using the mechanical brake, the energy efficiency will decrease. In this case, since the regenerative power can be charged to the storage battery 20 via the chopper device 9, the energy previously consumed as heat can be recovered, and the energy efficiency can be improved.
  • the chopper device 9 also has an emergency running function. If an accident occurs at a substation (not shown), which is the power supply source of the overhead line 1, the overhead line 1 will be cut off. Since the power source of the inverter device 6 is lost due to the power failure of the overhead wire 1, the motor 5 cannot be driven and the vehicle 8 cannot be operated.
  • the chopper device 9 and the storage battery 20 are provided, so that the power of the storage battery 20 can be converted via the chopper device 9 and the inverter device 9 even if the overhead wire 1 has a power failure. , Electric power can be supplied to the electric power 5. That is, even if the overhead wire 1 has a power failure, the vehicle 8 can be operated by using the electric power of the storage battery 20.
  • the switching elements Q1 to Q8 mounted on the inverter device 6 and the chopper device 9 since the switching element is a semiconductor, it may accidentally fail. If the chopper device 9 fails, it becomes impossible to supply the electric power of the storage battery 20 to the inverter device 6, so that the emergency running function is lost.
  • a contactor 21 for directly connecting the storage battery 20 to the overhead wire is provided.
  • the voltage level of the overhead wire 1 and the storage battery 20 are different, such as 1500 V for the voltage of the overhead wire 1 and 800 V for the voltage of the storage battery 20, will be described.
  • FIG. 3 is a diagram showing a timing chart at the start of emergency running.
  • the contactors 14a, 14b, 19 and the circuit breaker 11 are turned on.
  • the contactors 14a, 14b, 19 and the circuit breaker 11 are opened, and the contactor 21 is turned on.
  • the filter capacitor 18a of the inverter device 6 is charged to 1500V, while the voltage of the storage battery 20 is 800V.
  • the power conversion system according to the present invention includes a failure determination unit 22 of the chopper device 9 in addition to the contactor 21. If the chopper device 9 fails, the electric power of the storage battery 20 cannot be supplied to the inverter device 6, so that the emergency running function is lost. Therefore, when the failure determination unit 22 of the chopper device 21 detects a failure and starts emergency running, the power of the storage battery 20 is supplied to the inverter device 6 by turning on the contactor 21. If the chopper device 9 is normal, the contactor 21 is in an open state during emergency driving. In order to make these operation modes function, in addition to the failure determination unit 22, an emergency travel determination unit 23 for detecting emergency travel and a contactor input control unit 21 for controlling contactor input are provided. ..
  • the advantage of opening the contact device 21 is that when the voltage of the storage battery 20 is lower than the overhead wire 1, the voltage of the storage battery 20 is converted into DC-AC power by the inverter device 6 to drive the electric motor 5, which occurs when the vehicle runs at high speed.
  • the counter electromotive force is relatively higher than the voltage of the filter capacitor 18a, and the output torque of the electric motor 5 is lowered. Therefore, the contactor 21 is opened, and the storage battery 20 is used for emergency running via the chopper device 9.
  • the voltage of the filter capacitor 18a of the inverter device 6 can be made equal to that of the overhead wire 1, and the output torque of the motor 5 can be improved.
  • FIG. 4 is a diagram showing an operation flowchart of the power conversion system according to the first embodiment.
  • the following sequence of the entire operation flow is executed by a control device (not shown) that controls the power conversion system according to the present invention, including the contactor closing control unit 21, the failure determination unit 22, and the emergency travel determination unit 23. do.
  • This control device may be realized by hardware or software, and may be configured to include a contactor closing control unit 21, a failure determination unit 22, and an emergency travel determination unit 23 as shown in FIG. good.
  • step 1000 the power conversion system is started.
  • step 1001 the inverter device 6 starts normal operation.
  • step 1002 the failure determination unit 22 monitors the state of the chopper device 9.
  • step 1003 the failure determination unit 22 detects whether or not the chopper device 9 is in a failure state. If it is not in a faulty state (No), the process returns to step 1002 and the monitoring of the state of the chopper device 9 is continued. If a failure state is detected (Yes), the process proceeds to step 1004.
  • step 1004 the contactor closing control unit 21 that receives the signal from the failure determination unit 22 opens the contactors 14b and 19.
  • the contactor closing control unit 21 that receives the signal from the failure determination unit 22 opens the contactors 14b and 19.
  • a large current flows from the overhead wire 1 to the chopper device 9 when the contactor 14b is turned on.
  • the contactor 19 is turned on, the chopper from the storage battery 20 Since a large current flows through the device 9, it is opened to avoid these.
  • the contactor 12b is in an open state.
  • step 1005 the emergency travel determination unit 23 detects the presence or absence of an emergency travel command for the inverter device 6.
  • the emergency running command is not detected (No)
  • the inverter device 6 continues the normal operation, and the emergency running determination unit 23 continues to detect the emergency running command. If an emergency travel command is detected (Yes), the process proceeds to step 1006.
  • step 1006 the contactor closing control unit 21 that received the signal from the emergency travel determination unit 23 opens the circuit breaker 11. This operation is for disconnecting the overhead wire 1 and the inverter device 6.
  • step 1007 the control unit (not shown) of the discharge circuit of the inverter device 6 turns on the switching element 17a for a predetermined time, and discharges the filter capacitor 18a using the resistor 16a.
  • the filter capacitor 18a is discharged from DC 1500V to 0V.
  • step 1008 the contactor charging control unit 21 inputs the contactors 12a and 21, so that the filter capacitor 18a is initially charged using the resistor 13a. For example, when the voltage of the storage battery 20 is DC 800V, the filter capacitor 18a is charged from 0V to DC 800V.
  • step 1009 the contactor closing control unit 21 throws in the contactor 14a and opens the contactor 12a.
  • the storage battery 20 and the filter capacitor 18a are directly connected.
  • step 1010 the emergency run of the inverter device 6 using the storage battery 20 is started.
  • step 1011 this operation flowchart ends.
  • FIG. 5 is a diagram showing a timing chart of the power conversion system according to the first embodiment.
  • the difference from the control mode according to the timing chart shown in FIG. 3 is that the switching element 17a and the contactor 12a are controlled.
  • the contactor 21 is inserted in a state where the voltage of the filter capacitor 18a and the voltage of the storage battery 20 are different, a large current flows through the storage battery 20 and the voltage of the filter capacitor 18a vibrates. Was there.
  • the timing chart shown below makes it possible to avoid the above situation.
  • the circuit breaker 11 and the contactor 14a are opened, and the filter capacitor 18a is used as an operation before the contactor 21 is turned on by using the switching element 17a and the resistor 16a. To discharge.
  • the contactor 12a is turned on together with the contactor 21, and the voltage of the filter capacitor 18a is charged to the voltage of the storage battery 20 using the resistor 13a.
  • the current flowing from the storage battery 20 into the filter capacitor 18a can be reduced as compared with the case of the timing chart shown in FIG.
  • the voltage of the filter capacitor 18a does not vibrate, and it is possible to avoid shortening the life of the storage battery 20 and the contactor 21.
  • the contactor 14a is turned on and the contactor 12a is opened to start the emergency running of the inverter device 6 using the storage battery 20.
  • the filter capacitor 18a is discharged to 0V, but it may be reduced to a level equivalent to the voltage of the storage battery 20 instead of 0V. If the voltage of the filter capacitor 18a and the voltage of the storage battery 20 are the same, the current flowing through the storage battery 20 can be reduced even if the contactor 21 is inserted without using the resistor 13a. Further, since the circuit for charging the filter capacitor 18a from the storage battery 20 and the circuit for charging the filter capacitor 18a from the overhead wire 1 share common parts, the power conversion system can be downsized by reducing the number of parts. ..
  • FIG. 6 is a diagram showing a circuit configuration of the power conversion system according to the second embodiment of the present invention. Since the configurations, functions, and operations of the inverter device 6 and the chopper device 9 are the same as those in the first embodiment, they will be omitted. Further, both the opening means 14a and the opening means 14b are contactors.
  • the contactor 12b and the resistor 13b are omitted as compared with the circuit configuration of the first embodiment shown in FIG. 2, but the circuit configuration of the second embodiment is also the same as that of the first embodiment shown in FIG. With the same operation flowchart, the same function as that of the first embodiment can be achieved. Further, since the contactor 12b and the resistor 13b can be omitted, the power conversion system can be further miniaturized.
  • FIG. 7 is a diagram showing a circuit configuration of the power conversion system according to the third embodiment of the present invention. Since the configurations, functions, and operations of the inverter device 6 and the chopper device 9 are the same as those in the first embodiment, they will be omitted.
  • the circuit breaker 11 is replaced with the contactor 14, and the contactors 14a and 14b are replaced with the switching elements Q9 and Q10, respectively, as compared with the circuit configuration of the first embodiment shown in FIG.
  • Example 3 The effect of the configuration of Example 3 will be described. If the inverter device 6 or chopper device 9 fails, or if the filter reactors 15a or 15b have a ground fault, an accident current flows from the overhead wire 1 and the substation (not shown) that supplies power to the overhead wire 1 loses power. .. In order to cut off this accident current, the circuit breaker 11 is mounted in the first embodiment, but the circuit breaker has a high allowable current, so the scale of the device is large. On the other hand, in the third embodiment, the switching elements Q9 and Q10 and the resistors 16a and 16b are provided in parallel with them.
  • Switching elements have a faster operating time than mechanical circuit breakers and contactors. Therefore, the switching elements Q9 and Q10 can be turned off before the fault current increases, and the fault current can be reduced by the resistors 16a and 16b. Since the reduced current is smaller than the accident current, it can be cut off by the contactor 14. As a result, a large circuit breaker becomes unnecessary, and the power conversion system can be further miniaturized.
  • the resistors 16a and 16b function as charging resistors for the filter capacitors 18a and 18b in addition to being resistors that reduce the fault current.
  • the switching element and the resistor are further connected in parallel with the switching elements Q9 and Q10.
  • a series circuit (not shown) may be connected. This makes it possible to switch between a resistor that reduces the fault current and a resistor that initially charges the filter capacitors 18a and 18b.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Inverter Devices (AREA)

Abstract

En relation avec l'alimentation en énergie électrique d'une batterie de stockage à un dispositif onduleur pendant un fonctionnement d'urgence lorsqu'un dispositif hacheur a mal fonctionné, afin de résoudre le problème selon lequel un courant excessif circule vers la batterie de stockage lors de la commutation sur un contacteur qui doit être connecté, ce qui provoque la détérioration de la durée de vie de la batterie de stockage et du contacteur, l'invention concerne un système de conversion de puissance comprenant un dispositif onduleur pour entraîner un moteur par conversion d'une énergie en courant continu provenant d'un fil aérien en énergie à courant alternatif par l'intermédiaire d'un premier moyen d'ouverture, d'un deuxième moyen d'ouverture et d'un premier réacteur de filtration, un dispositif hacheur pour commander l'énergie de la batterie de stockage au moyen d'un troisième réacteur, par conversion courant continu-courant continu de l'énergie en courant continu provenant du fil aérien au moyen du premier moyen d'ouverture, d'un troisième moyen d'ouverture et d'un deuxième réacteur de filtration, un premier contacteur connecté entre le dispositif hacheur et la batterie de stockage et un second contacteur connecté entre le premier moyen d'ouverture et la batterie de stockage, l'ouverture et la fermeture des premier à troisième moyens d'ouverture et des premier et second contacteurs étant commandées en fonction d'une détection de dysfonctionnement du dispositif hacheur et d'une détection d'une défaillance d'énergie du fil aérien.
PCT/JP2021/025122 2020-07-09 2021-07-02 Système de conversion de puissance, son procédé de commande et véhicule ferroviaire équipé de celui-ci WO2022009794A1 (fr)

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JP2020118347A JP7407079B2 (ja) 2020-07-09 2020-07-09 電力変換システム、その制御方法およびそれを搭載した鉄道車両
JP2020-118347 2020-07-09

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WO2022009794A1 true WO2022009794A1 (fr) 2022-01-13

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4887509A (fr) * 1972-02-26 1973-11-17
JPS5021407A (fr) * 1973-07-02 1975-03-07
JPS5347496B1 (fr) * 1969-06-23 1978-12-21
JPS592502A (ja) * 1982-05-27 1984-01-09 ゼネラル・エレクトリツク・カンパニイ 電力制御装置に対する故障検出及び禁止回路
JP2012034537A (ja) * 2010-08-02 2012-02-16 Fuji Electric Co Ltd 電気車用駆動回路

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5347496B1 (fr) * 1969-06-23 1978-12-21
JPS4887509A (fr) * 1972-02-26 1973-11-17
JPS5021407A (fr) * 1973-07-02 1975-03-07
JPS592502A (ja) * 1982-05-27 1984-01-09 ゼネラル・エレクトリツク・カンパニイ 電力制御装置に対する故障検出及び禁止回路
JP2012034537A (ja) * 2010-08-02 2012-02-16 Fuji Electric Co Ltd 電気車用駆動回路

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JP2022015480A (ja) 2022-01-21

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