WO2021114332A1 - Multi-current standard converter - Google Patents

Multi-current standard converter Download PDF

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Publication number
WO2021114332A1
WO2021114332A1 PCT/CN2019/126249 CN2019126249W WO2021114332A1 WO 2021114332 A1 WO2021114332 A1 WO 2021114332A1 CN 2019126249 W CN2019126249 W CN 2019126249W WO 2021114332 A1 WO2021114332 A1 WO 2021114332A1
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WO
WIPO (PCT)
Prior art keywords
switch
terminal
phase
output terminal
power supply
Prior art date
Application number
PCT/CN2019/126249
Other languages
French (fr)
Chinese (zh)
Inventor
李华
翁星方
程俊
吴刚
唐雄辉
李文亮
李昆玉
高帅
钟林成
邱蔡
徐慧琳
Original Assignee
株洲中车时代电气股份有限公司
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Publication of WO2021114332A1 publication Critical patent/WO2021114332A1/en

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    • 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
    • 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
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
    • H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
    • H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • 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
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • 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
    • H02M7/53—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 using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—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 using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters

Definitions

  • the invention relates to the technical field of EMUs, in particular to a multi-flow converter.
  • EMUs have gradually become one of the main means of transportation for people's daily travel, and various countries are also vigorously developing their own EMU networks.
  • the existing dual-current converters can satisfy both DC and AC voltage systems.
  • the dual-current converter is equipped with multiple isolation switches and a secondary filter circuit is designed in the DC loop.
  • the circuit of the secondary filter circuit is complicated and the number of components is large, and the power capacitor and reactor are large in size and weight. The aforementioned factors will cause the dual-flow converter to be large in size, heavy in weight, and complex in structure.
  • the embodiments of the present invention provide a multi-flow converter to solve the problems of large volume, heavy weight, and complex structure of the existing dual-flow converter.
  • the first aspect of the embodiments of the present invention discloses a multi-stream converter, and the multi-stream converter includes:
  • the first terminal of the first AC switch is connected to the positive output terminal of the first secondary winding
  • the second terminal of the first AC switch is connected to the first positive input terminal of the rectifier
  • the first terminal of the rectifier A negative input terminal is connected to the negative output terminal of the first secondary winding
  • the first terminal of the second AC switch is connected to the positive output terminal of the second secondary winding
  • the second terminal of the second AC switch is connected to the second positive input terminal of the rectifier
  • the first terminal of the rectifier Two negative input terminals are connected with the negative output terminal of the second secondary winding
  • the input end of the first switch circuit is connected to an internal combustion generator, the first output end of the first switch circuit is connected to the first positive input end of the rectifier, and the second output end of the first switch circuit is connected to The first negative input terminal of the rectifier is connected, and the third output terminal of the first switch loop is connected with the second negative input terminal of the rectifier;
  • the output terminal of the rectifier is connected in parallel with the input terminal of the DC loop, and the output terminal of the DC loop is connected in parallel with the powered equipment;
  • the input end of the second switch loop is connected with a DC power supply, and the output end of the second switch loop is connected in parallel with the powered device.
  • the powered equipment includes at least one or more of a traction inverter circuit, an auxiliary inverter circuit, and a DC output circuit;
  • the input terminal of the auxiliary inverter circuit is connected in parallel with the output terminal of the direct current loop and the output terminal of the second switch loop respectively;
  • the output terminal of the auxiliary inverter circuit is connected to an AC load, the output terminal of the auxiliary inverter circuit is connected to the input terminal of the DC output circuit, and the output terminal of the DC output circuit is connected to a DC load;
  • the input terminals of the traction inverter circuit are respectively connected in parallel with the output terminals of the DC loop and the output terminal of the second switching circuit, and the output terminals of the traction inverter circuit are respectively connected with n traction motors, and n is positive. Integer.
  • the DC loop includes: a first resistor, a second resistor, a voltage sensor, and a supporting capacitor;
  • the first end of the first resistor is connected to the positive output end of the rectifier, the second end of the first resistor is connected to the first end of the second resistor, and the second end of the second resistor is connected to the The negative output terminal of the rectifier is connected;
  • the first end of the voltage sensor is connected to the positive output end of the rectifier, the second end of the voltage sensor is grounded, and the second end of the voltage sensor is connected to the second end of the first resistor;
  • the supporting capacitor is connected in parallel with the rectifier, and the supporting capacitor is connected in parallel with the output end of the second switching circuit and the powered device respectively.
  • the traction inverter circuit includes: a traction inverter module, a chopping current sensor and a chopping resistance;
  • the input terminal of the traction inverter module is connected in parallel with the output terminal of the DC loop, the first terminal of the chopper current sensor is connected to the traction inverter module, and the second terminal of the chopper current sensor passes through the
  • the chopper resistor is connected to the negative input terminal of the traction inverter module.
  • the auxiliary inverter circuit includes: a DC-AC module and an AC-AC module;
  • the input terminal of the DC-AC module is connected in parallel with the output terminal of the DC loop, the output terminal of the DC-AC module is connected with the input terminal of the AC-AC module, and the output terminal of the AC-AC module is connected with The input end of the DC output circuit is connected, and the output end of the AC-AC module is connected to the AC load.
  • the multi-current converter further includes: a third resistor and a third AC switch closed in the AC power supply mode;
  • the first end of the third AC switch is connected to the positive output end of the first secondary winding, and the second end of the third AC switch is connected to the first positive input of the rectifier through the third resistor ⁇ End connection.
  • the first switching circuit includes: a first three-phase contactor
  • the W-phase input terminal, the V-phase input terminal and the U-phase input terminal of the first three-phase contactor are respectively connected to the W-phase output terminal, the V-phase output terminal and the U-phase output terminal of the internal combustion generator;
  • the W-phase output terminal of the first three-phase contactor is connected to the first positive input terminal of the rectifier, and the V-phase output terminal of the first three-phase contactor is connected to the first negative input terminal of the rectifier,
  • the U-phase output terminal of the first three-phase contactor is connected to the second negative input terminal of the rectifier.
  • the first switching circuit further includes: a second three-phase contactor and a fourth resistor;
  • the W-phase input end, the V-phase input end and the U-phase input end of the second three-phase contactor are respectively connected to the W-phase output end, the V-phase output end and the U-phase output end of the internal combustion generator;
  • the W-phase output terminal, the V-phase output terminal, and the U-phase output terminal of the second three-phase contactor are respectively connected to the W-phase output terminal, the V-phase output terminal and the U-phase output terminal of the second three-phase contactor through the fourth resistor.
  • the second switch circuit includes: an isolating switch and a first DC switch;
  • the first end of the first DC switch is connected to the positive output end of the DC power supply, and the second end of the first DC switch is connected to the first input end of the isolating switch;
  • the second input terminal of the isolation switch is grounded through a capacitor, and the second input terminal of the isolation switch is connected to the negative output terminal of the DC power supply;
  • the first output terminal of the isolation switch is connected with the positive input terminal of the traction inverter circuit, and the second output terminal of the isolation switch is connected with the negative input terminal of the traction inverter circuit.
  • the second switch circuit further includes: a fifth resistor and a second DC switch closed in the DC power supply mode;
  • the first terminal of the second DC switch is connected to the positive output terminal of the DC power supply, and the second terminal of the second DC switch is connected to the second terminal of the first DC switch through the fifth resistor .
  • a multi-current converter includes: a rectifier, a DC loop, a first AC switch and a second AC switch closed in an AC grid power supply mode, and internal combustion power generation The first switching circuit closed in the machine power supply mode and the second switching circuit closed in the DC power supply mode.
  • the multi-current converter meets the AC grid power supply mode, the internal combustion generator power supply mode and the DC power supply mode to ensure that the EMU meets different voltage systems during operation.
  • the secondary filter circuit is eliminated to simplify the multi-current system transformation.
  • the structure of the flow converter reduces the volume and weight of the multi-flow converter.
  • Fig. 1 is a schematic structural diagram of a multi-stream converter provided by an embodiment of the present invention
  • Figure 2 is a schematic structural diagram of another multi-flow converter provided by an embodiment of the present invention.
  • Figure 3 is a schematic structural diagram of yet another multi-stream converter provided by an embodiment of the present invention.
  • Figure 4 is a schematic structural diagram of yet another multi-stream converter provided by an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a multi-stream converter provided by an embodiment of the present invention.
  • the numbers of the components involved in the embodiment of the present invention are: rectifier 101, DC loop 102, traction inverter circuit 103, auxiliary inverter circuit 104, DC output circuit 105, first AC switch 106, second AC switch 107, The first switch circuit 108, the second switch circuit 109, the third resistor 110, the third AC switch 111, the first current sensor 112, the second current sensor 113 and the capacitor 114.
  • the terms “include”, “include” or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes no Other elements clearly listed, or also include elements inherent to this process, method, article, or equipment. If there are no more restrictions, the element defined by the sentence “including a" does not exclude the existence of other identical elements in the process, method, article, or equipment that includes the element.
  • the existing dual-current converter can meet the two voltage systems of DC and AC.
  • the dual-current converter is equipped with multiple isolation switches and the secondary filter circuit is designed in the DC loop.
  • the circuit of the secondary filter circuit is complicated and the number of components is large, which will cause the dual-current converter to be bulky and heavy. Heavy and complex structure.
  • an embodiment of the present invention provides a multi-current converter, which includes: a rectifier, a DC loop, a first AC switch and a second AC switch that are closed in an AC grid power supply mode, and an internal combustion generator The first switching circuit closed in the power supply mode and the second switching circuit closed in the DC power supply mode.
  • the secondary filter circuit is eliminated to reduce the volume and weight of the multi-flow converter.
  • the multi-current converter includes: a rectifier 101, a DC loop 102, and a second closed circuit in AC grid power supply mode.
  • the first terminal of the first AC switch 106 is connected to the positive output terminal of the first secondary winding (the s1 terminal in FIG. 1), and the second terminal of the first AC switch 106 is connected to the rectifier 101
  • the first positive input terminal is connected, and the first negative input terminal of the rectifier 101 is connected to the negative output terminal of the first secondary winding (the s2 terminal in FIG. 1).
  • the first end of the second AC switch 107 is connected to the positive output end of the second secondary winding (the s3 end in FIG. 1), and the second end of the second AC switch 107 is connected to the rectifier 101
  • the second positive input terminal is connected, and the second negative input terminal of the rectifier 101 is connected to the negative output terminal of the second secondary winding (terminal s4 in FIG. 1).
  • the input terminal of the first switch circuit 108 is connected to an internal combustion generator, the first output terminal of the first switch circuit 108 is connected to the first positive input terminal of the rectifier 101, and the first switch circuit 108 is connected to the first positive input terminal of the rectifier 101.
  • the second output terminal is connected to the first negative input terminal of the rectifier 101, and the third output terminal of the first switch circuit 108 is connected to the second negative input terminal of the rectifier 101.
  • the output terminal of the rectifier 101 is connected in parallel with the input terminal of the DC loop 102, and the output terminal of the DC loop 102 is connected in parallel with the powered device.
  • the input end of the second switch circuit 109 is connected to a DC power supply (also referred to as a DC power supply network), and the output end of the second switch circuit 109 is connected in parallel with the powered device.
  • a DC power supply also referred to as a DC power supply network
  • the multi-current converter meets multiple power supply modes such as AC grid power supply mode, internal combustion generator power supply mode, and DC power supply mode, etc., in order to better explain the operation of the multi-current converter under different power supply modes The status is explained by the following.
  • AC grid power supply mode After the AC input voltage of the AC grid is transformed by the traction transformer, it enters the multi-current converter through the two secondary windings (s1/s2, s3/s4). The single-phase AC input voltage is input to the rectifier 101 through the first AC switch 106 and the second AC switch 107.
  • the rectifier 101 converts the single-phase AC input voltage into a DC input voltage, and transmits the DC input voltage to the powered device through the DC loop 102 to supply power to the powered device.
  • the three-phase AC power output by the internal combustion generator is input to the rectifier 101 through the first switching circuit 108, and the rectifier 101 converts the three-phase AC power into a DC input voltage and passes through the DC circuit 102 transmits the DC input voltage to the powered device to supply power to the powered device.
  • an insulated gate bipolar transistor (IGBT) anti-parallel diode is used to realize three-phase uncontrollable rectification.
  • DC power supply mode the DC power supply transmits the DC input voltage to the powered device through the second switch circuit 109 to supply power to the powered device.
  • the multi-current converter meets different power supply modes such as AC grid power supply mode, internal combustion generator power supply mode, and DC power supply mode, so as to ensure that the EMU meets different voltage systems during operation.
  • the multi-flow converter eliminates the secondary filter circuit, simplifies the structure of the multi-flow converter, and reduces the volume and weight of the multi-flow converter.
  • the powered equipment includes at least one or more of the traction inverter circuit 103, the auxiliary inverter circuit 104, and the DC output circuit 105.
  • Fig. 2 there is shown a schematic structural diagram of a multi-flow converter provided by an embodiment of the present invention.
  • the input terminal of the auxiliary inverter circuit 104 is connected in parallel with the output terminal of the DC loop 102 and the output terminal of the second switch loop 109 respectively. That is to say, the input terminal of the auxiliary inverter circuit 104 is connected in parallel with the output terminal of the DC loop 102, and the input terminal of the auxiliary inverter circuit 104 is connected in parallel with the output terminal of the second switch circuit 109.
  • the output terminal of the auxiliary inverter circuit 104 is connected to an AC load, the output terminal of the auxiliary inverter circuit 104 is connected to the input terminal of the DC output circuit 105, and the output terminal of the DC output circuit 105 is connected to a DC load .
  • the input terminal of the traction inverter circuit 103 is connected in parallel with the output terminal of the DC circuit 102 and the output terminal of the second switch circuit 109, respectively, and the output terminal of the traction inverter circuit 103 is respectively connected with n traction motors (For example, M1 and M2 in Figure 2), n is a positive integer. That is, the input terminal of the traction inverter circuit 103 is connected in parallel with the output terminal of the DC loop 102, and the input terminal of the traction inverter circuit 103 is connected in parallel with the output terminal of the second switch circuit 109.
  • the DC output circuit 105 is used to convert AC voltage into a DC voltage, that is, the DC output circuit 105 may be an AC-DC module.
  • the DC output circuit 105 can also be used to supply power to the battery, that is, the output terminal of the DC output circuit 105 can also be connected to the battery.
  • the multi-current converter meets multiple power supply modes such as AC grid power supply mode, internal combustion generator power supply mode, and DC power supply mode, etc., in order to better explain the operation of the multi-current converter under different power supply modes The status is explained by the following.
  • AC grid power supply mode After the AC input voltage of the AC grid is transformed by the traction transformer, it enters the multi-current converter through the two secondary windings (s1/s2, s3/s4). The single-phase AC input voltage is input to the rectifier 101 through the first AC switch 106 and the second AC switch 107.
  • the rectifier 101 converts the single-phase AC input voltage into a DC input voltage, and inputs the DC input voltage into the traction inverter circuit 103 and the auxiliary inverter circuit 104 through the DC loop 102.
  • the traction inverter circuit 103 performs corresponding processing on the DC input voltage and supplies power to the n traction motors.
  • the auxiliary inverter circuit 104 performs corresponding processing on the DC input voltage and then inputs it to the DC output circuit 105, and supplies power to the AC load.
  • the DC output circuit 105 supplies power to the DC load.
  • Internal combustion generator power supply mode the three-phase AC power output by the internal combustion generator is input to the rectifier 101 through the first switch circuit 108, and the rectifier 101 converts the three-phase AC power into a DC input voltage, and the traction inverter circuit 103.
  • the processing process of the auxiliary inverter circuit 104 and the DC output circuit 105 on the DC input voltage can be referred to the related content of the AC grid power supply mode described above, which will not be repeated here.
  • an insulated gate bipolar transistor (IGBT) anti-parallel diode is used to realize three-phase uncontrollable rectification.
  • DC power supply mode the DC power supply inputs the DC input voltage into the traction inverter circuit 103, the auxiliary inverter circuit 104, and the DC output circuit 105 through the second switch circuit 109, and the traction inverter circuit 103
  • the processing process of the auxiliary inverter circuit 104 and the DC output circuit 105 on the DC input voltage please refer to the related content of the AC grid power supply mode described above, which will not be repeated here.
  • the multi-current converter meets different power supply modes such as AC grid power supply mode, internal combustion generator power supply mode, and DC power supply mode, so as to ensure that the EMU meets different voltage systems during operation.
  • the multi-flow converter eliminates the secondary filter circuit, simplifies the structure of the multi-flow converter, and reduces the volume and weight of the multi-flow converter.
  • FIG. 2 and Fig. 3 there is shown a schematic structural diagram of another multi-flow converter provided by an embodiment of the present invention.
  • the DC loop 102 includes a first resistor 1021, a second resistor 1022, a voltage sensor 1023 and a supporting capacitor 1024.
  • the first end of the first resistor 1021 is connected to the positive output end of the rectifier 101
  • the second end of the first resistor 1021 is connected to the first end of the second resistor 1022
  • the second resistor 1022 is The second terminal of is connected to the negative output terminal of the rectifier 101.
  • the first terminal of the voltage sensor 1023 is connected to the positive output terminal of the rectifier 101, the second terminal of the voltage sensor 1023 is grounded, and the second terminal of the voltage sensor 1023 is connected to the second terminal of the first resistor 1021. ⁇ End connection.
  • the supporting capacitor 1024 is connected in parallel with the rectifier 101, and the supporting capacitor 1024 is connected to the output terminal of the second switching circuit 109, the input terminal of the traction inverter circuit 103, and the input terminal of the auxiliary inverter circuit 104, respectively. The ends are connected in parallel.
  • the first resistor 1021, the second resistor 1022, and the supporting capacitor 1024 constitute a filter tank circuit. Since the N line of the vehicle is suspended, the voltage sensor 1023 can also be used to provide a grounding detection function.
  • the traction inverter circuit 103 includes: a traction inverter module 1031 (INV), a chopping current sensor 1032, and a chopping resistor 1033.
  • the input end of the traction inverter module 1031 (INV) is connected in parallel with the output end of the DC loop 102, the first end of the chopping current sensor 1032 is connected to the traction inverter module 1031, and the chopping current
  • the second terminal of the sensor 1032 is connected to the negative input terminal of the traction inverter module 1031 through the chopper resistor 1033.
  • the first end of the chopper current sensor 1032 is connected to the chopper tube of the traction inverter module 1031.
  • the chopper tube is provided inside the traction inverter module 1031, and the chopper tube is used to quickly release the DC voltage.
  • the auxiliary inverter circuit 104 includes: a DC-AC module 1041 and an AC-AC module 1042.
  • the input end of the DC-AC module 1041 is connected in parallel with the output end of the DC loop 102, the output end of the DC-AC module 1041 is connected to the input end of the AC-AC module 1042, and the AC-AC module
  • the output terminal of 1042 is connected to the input terminal of the DC output circuit 105, and the output terminal of the AC-AC module 1042 is connected to the AC load.
  • the AC-AC module 1042 is used to convert the AC input voltage into AC power that meets the preset requirements to supply power to the AC load.
  • the first switch circuit 108 includes: a first three-phase contactor 1081.
  • the W-phase input end, V-phase input end, and U-phase input end of the first three-phase contactor 1081 are respectively connected to the W-phase output end, V-phase output end and U-phase output end of the internal combustion generator.
  • the W-phase output terminal of the first three-phase contactor 1081 is connected to the first positive input terminal of the rectifier 101, and the V-phase output terminal of the first three-phase contactor 1081 is connected to the first negative terminal of the rectifier 101.
  • the input terminal is connected, and the U-phase output terminal of the first three-phase contactor 1081 is connected to the second negative input terminal of the rectifier 101.
  • the second switch circuit 109 includes: an isolating switch 1091 and a first DC switch 1092.
  • the first terminal of the first DC switch 1092 is connected to the positive output terminal of the DC power supply, and the second terminal of the first DC switch 1092 is connected to the first input terminal of the isolating switch 1091.
  • the second input terminal of the isolation switch 1091 is grounded through the capacitor 114, and the second input terminal of the isolation switch 1091 is connected to the negative output terminal of the DC power supply.
  • the first output terminal of the isolation switch 1091 is connected to the positive input terminal of the traction inverter circuit 103, and the second output terminal of the isolation switch 1091 is connected to the negative input terminal of the traction inverter circuit 103.
  • the multi-current converter meets multiple power supply modes such as AC grid power supply mode, internal combustion generator power supply mode, and DC power supply mode.
  • power supply modes such as AC grid power supply mode, internal combustion generator power supply mode, and DC power supply mode.
  • AC grid power supply mode After the AC input voltage of the AC grid is transformed by the traction transformer, it enters the multi-current converter through the two secondary windings (s1/s2, s3/s4). The single-phase AC input voltage is input to the rectifier 101 through the first AC switch 106 and the second AC switch 107.
  • the first resistor 1021, the second resistor 1022, and the supporting capacitor 1024 constitute the filter tank circuit.
  • the rectifier 101 converts the single-phase AC input voltage into a DC input voltage, and inputs the DC input voltage into the traction inverter module 1031 and the DC-AC module 1041 through the filter energy storage circuit.
  • the traction inverter module 1031 performs corresponding processing on the DC input voltage and supplies power to the n traction motors.
  • the DC-AC module 1041 converts the DC input voltage into an AC input voltage
  • the AC-AC module 1042 converts the AC input voltage into an AC power meeting a preset requirement to supply power to the AC load.
  • the AC-AC module 1042 inputs the alternating current that meets the preset requirements into the direct current output circuit 105, and the direct current output circuit 105 converts the alternating current into direct current to supply power to the direct current load.
  • Internal combustion generator power supply mode the three-phase AC power output by the internal combustion generator is input to the rectifier 101 through the first three-phase contactor 1081, and the rectifier 101 converts the three-phase AC power into a DC input voltage for subsequent content, please refer to The related content of the above-mentioned AC grid power supply mode will not be repeated here.
  • DC power supply mode the DC power supply inputs the DC input voltage into the traction inverter module 1031 and the DC-AC module 1041 through the first DC switch 1092 and the isolating switch 1091, respectively, and the traction inverter module
  • the DC-AC module 1031 and the DC-AC module 1041 For the subsequent processing of the DC input voltage by the DC-AC module 1031 and the DC-AC module 1041, please refer to the related content of the AC power supply mode described above, which will not be repeated here.
  • the multi-current converter meets different power supply modes such as AC grid power supply mode, internal combustion generator power supply mode, and DC power supply mode, so as to ensure that the EMU meets different voltage systems during operation.
  • the multi-flow converter eliminates the secondary filter circuit, simplifies the structure of the multi-flow converter, and reduces the volume and weight of the multi-flow converter.
  • FIG. 3 and Fig. 4 there is shown a schematic structural diagram of yet another multi-flow converter provided by an embodiment of the present invention.
  • the multi-current converter further includes: a third resistor 110 and a third AC switch 111 closed in the AC grid power supply mode.
  • the first terminal of the third AC switch 111 is connected to the positive output terminal of the first secondary winding, and the second terminal of the third AC switch 111 is connected to the rectifier 101 through the third resistor 110 The first positive input terminal is connected.
  • first AC switch 106, the third AC switch 111 and the third resistor 110 constitute a charging short circuit.
  • the first switch circuit 108 further includes: a second three-phase contactor 1082 and a fourth resistor 1083.
  • the W-phase input end, V-phase input end, and U-phase input end of the second three-phase contactor 1082 are respectively connected to the W-phase output end, V-phase output end and U-phase output end of the internal combustion generator.
  • the W-phase output terminal, the V-phase output terminal, and the U-phase output terminal of the second three-phase contactor 1082 are connected to the W-phase output terminal and the V-phase output terminal of the second three-phase contactor 1082 through the fourth resistor 1083, respectively.
  • the output terminal is connected to the U-phase output terminal.
  • the second switch circuit 109 further includes: a fifth resistor 1093 and a second DC switch 1094 closed in the DC power supply mode.
  • the first terminal of the second DC switch 1094 is connected to the positive output terminal of the DC power supply, and the second terminal of the second DC switch 1094 is connected to the first DC switch 1092 through the fifth resistor 1093. The second end is connected.
  • the multi-flow converter further includes: a first current sensor 112 and a second current sensor 113;
  • the first end of the first current sensor 112 is connected to the negative output end of the second secondary winding, and the second end of the first current sensor 112 is connected to the second negative input end of the rectifier 101.
  • the first end of the second current sensor 113 is connected to the negative output end of the first secondary winding, and the second end of the second current sensor 113 is connected to the first negative input end of the rectifier 101.
  • the multi-current converter meets multiple power supply modes such as AC grid power supply mode, internal combustion generator power supply mode, and DC power supply mode.
  • power supply modes such as AC grid power supply mode, internal combustion generator power supply mode, and DC power supply mode.
  • the first AC switch 106, the third AC switch 111 and the third resistor 110 constitute a charging short circuit.
  • AC grid power supply mode After the AC input voltage of the AC grid is transformed by the traction transformer, it enters the multi-current converter through the two secondary windings (s1/s2, s3/s4). The single-phase AC input voltage is input to the rectifier 101 through the charging short circuit, the second AC switch 107, the first current sensor 112, and the second current sensor 113.
  • the switching state of the components of the charging short circuit is: first close the third AC switch 111, at this time the first AC switch 106 is opened, and wait until the When the voltage of the supporting capacitor 1024 rises to a preset voltage value, the first AC switch 106 is closed, and the third AC switch 111 is opened.
  • the first resistor 1021, the second resistor 1022, and the supporting capacitor 1024 constitute the filter tank circuit.
  • the rectifier 101 converts the single-phase AC input voltage into a DC input voltage, and inputs the DC input voltage into the traction inverter module 1031 and the DC-AC module 1041 through the filter energy storage circuit.
  • the traction inverter module 1031 performs corresponding processing on the DC input voltage and supplies power to the n traction motors.
  • the DC-AC module 1041 converts the DC input voltage into an AC input voltage
  • the AC-AC module 1042 converts the AC input voltage into an AC power meeting a preset requirement to supply power to the AC load.
  • the AC-AC module 1042 inputs the alternating current that meets the preset requirements into the direct current output circuit 105, and the direct current output circuit 105 converts the alternating current into direct current to supply power to the direct current load.
  • the three-phase alternating current output by the internal combustion generator passes through the first three-phase contactor 1081, the second three-phase contactor 1082 and the fourth resistor 1083 into the rectifier 101, and the rectifier
  • the rectifier For the subsequent content of converting the three-phase AC power into DC input voltage, please refer to the related content of the AC grid power supply mode described above, which will not be repeated here.
  • the opening and closing states of the first three-phase contactor 1081 and the second three-phase contactor 1082 are: first close the second three-phase contactor 1082, At this time, the first three-phase contactor 1081 is disconnected, and when the voltage of the supporting capacitor 1024 rises to a preset voltage value, the first three-phase contactor 1081 is closed, and the second three-phase contact is disconnected ⁇ 1082.
  • DC power supply mode the DC power supply inputs the DC input voltage into the traction inverter module 1031 and the traction inverter module 1031 through the first DC switch 1092, the second DC switch 1094, the fifth resistor 1093, and the isolating switch 1091, respectively
  • the subsequent processing of the DC-AC module 1041, the traction inverter module 1031, and the DC-AC module 1041 on the DC input voltage please refer to the relevant content of the AC grid power supply mode mentioned above, and will not be repeated here. .
  • the opening and closing states of the first DC switch 1092 and the second DC switch 1094 are: first close the second DC switch 1094, and then the first DC switch 1094 A DC switch 1092 is opened, and when the voltage of the supporting capacitor 1024 rises to a preset voltage value, the first DC switch 1092 is closed, and the second DC switch 1094 is opened.
  • the structure diagram of the multi-flow multi-flow converter shown in FIG. 5 is used as an example. It should be noted that the figure The content shown in 5 is for illustration only.
  • the voltage is input from the AC power supply network, the internal combustion generator or the DC power supply network to the multi-current converter, and the multi-current converter is a traction motor, an AC Load and DC load power supply.
  • the voltage can also flow from the AC power supply network to the DC power supply network to charge related energy storage equipment (such as power batteries) in the DC power supply network. .
  • the voltage can also flow from the internal combustion generator to the DC power supply network to charge related energy storage devices (such as power batteries) in the DC power supply network. .
  • the energy generated by braking is fed back from the traction motor to the AC power supply network, the DC power supply network, the DC load and the AC load through the multi-current converter, so as to reduce the energy consumed by the braking resistor.
  • the embodiment of the present invention provides a multi-current converter, which includes: a rectifier, a DC loop, a first AC switch and a second AC switch that are closed in the AC grid power supply mode, The first switching circuit closed in the power supply mode of the internal combustion generator and the second switching circuit closed in the DC power supply mode.
  • the multi-current converter meets the AC grid power supply mode, the internal combustion generator power supply mode and the DC power supply mode to ensure that the EMU meets different voltage systems during operation.
  • the secondary filter circuit is eliminated to simplify the multi-current system transformation.
  • the structure of the flow converter reduces the volume and weight of the multi-flow converter.

Abstract

The present invention provides a multi-current standard converter. The multi-current standard converter comprises: a rectifier, a direct current loop, a first alternating current switch and a second alternating current switch which are turned off in an alternating current grid power supply mode, a first switch loop turned off in an internal combustion electric generator power supply mode, and a second switch loop turned off in a direct current power supply mode. In the solution, the multi-current standard converter meets the alternating current grid power supply mode, the internal combustion electric generator power supply mode, and the direct current power supply mode, which ensures that a power car meets different voltage standards during operation. At the same time, a secondary filter circuit is cancelled, which simplifies the structure of the multi-current standard converter, and reduces the volume and weight of the multi-current standard converter.

Description

一种多流制变流器Multi-stream system converter
本申请要求于2019年12月11日提交中国专利局、申请号为201911268515.9、发明名称为“一种多流制变流器”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on December 11, 2019, the application number is 201911268515.9, and the invention title is "a multi-flow converter", the entire content of which is incorporated into this application by reference in.
技术领域Technical field
本发明涉及动车组技术领域，具体涉及一种多流制变流器。The invention relates to the technical field of EMUs, in particular to a multi-flow converter.
背景技术Background technique
随着科学技术的发展，动车逐渐成为人们日常出行的主要交通工具之一，各个国家也在大力发展自身的动车组网络。With the development of science and technology, EMUs have gradually become one of the main means of transportation for people's daily travel, and various countries are also vigorously developing their own EMU networks.
由于不同国家的供电制式不同，尤其是欧洲的一些国家，这些国家的国土面积较小，动车在运行过程中难免会碰到供电制式的变化。现有技术中，现有的双流制变流器虽然能满足直流和交流两种电压制式。但是该双流制变流器配置多路隔离开关和在直流回路中设计二次滤波电路，而二次滤波电路的电路复杂和元器件数量较大，并且电力电容和电抗器的体积大和重量大，前述因素会造成双流制变流器的体积大、重量重和结构复杂。Due to the different power supply systems in different countries, especially in some European countries, these countries have small territories, and it is inevitable that EMUs will encounter changes in the power supply system during operation. In the prior art, the existing dual-current converters can satisfy both DC and AC voltage systems. However, the dual-current converter is equipped with multiple isolation switches and a secondary filter circuit is designed in the DC loop. The circuit of the secondary filter circuit is complicated and the number of components is large, and the power capacitor and reactor are large in size and weight. The aforementioned factors will cause the dual-flow converter to be large in size, heavy in weight, and complex in structure.
因此，目前在满足多种电压制式的前提下，如何减小变流器的体积和重量，以及如何简化变流器的结构，成为如今亟需解决的问题。Therefore, under the premise of satisfying multiple voltage systems, how to reduce the volume and weight of the converter and how to simplify the structure of the converter has become an urgent problem to be solved today.
发明内容Summary of the invention
有鉴于此，本发明实施例提供一种多流制变流器，以解决现有的双流制变流器的体积大、重量重和结构复杂等问题。In view of this, the embodiments of the present invention provide a multi-flow converter to solve the problems of large volume, heavy weight, and complex structure of the existing dual-flow converter.
为实现上述目的，本发明实施例提供如下技术方案：To achieve the foregoing objective, the embodiments of the present invention provide the following technical solutions:
本发明实施例第一方面公开一种多流制变流器，所述多流制变流器包括：The first aspect of the embodiments of the present invention discloses a multi-stream converter, and the multi-stream converter includes:
整流器、直流回路、交流电网供电模式下闭合的第一交流开关和第二交流开关、内燃发电机供电模式下闭合的第一开关回路和直流供电模式下闭合的第二开关回路；A rectifier, a DC circuit, a first AC switch and a second AC switch closed in the AC grid power supply mode, a first switching circuit closed in the internal combustion generator power supply mode, and a second switching circuit closed in the DC power supply mode;
所述第一交流开关的第一端与第一个次边绕组的正输出端连接，所述第一交流开关的第二端与所述整流器的第一正输入端连接，所述整流器的第一负输入端与所述第一个次边绕组的负输出端连接；The first terminal of the first AC switch is connected to the positive output terminal of the first secondary winding, the second terminal of the first AC switch is connected to the first positive input terminal of the rectifier, and the first terminal of the rectifier A negative input terminal is connected to the negative output terminal of the first secondary winding;
所述第二交流开关的第一端与第二个次边绕组的正输出端连接，所述第二交流开关的第二端与所述整流器的第二正输入端连接，所述整流器的第二负输入端与所述第二个次边绕组的负输出端连接；The first terminal of the second AC switch is connected to the positive output terminal of the second secondary winding, the second terminal of the second AC switch is connected to the second positive input terminal of the rectifier, and the first terminal of the rectifier Two negative input terminals are connected with the negative output terminal of the second secondary winding;
所述第一开关回路的输入端与内燃发电机连接，所述第一开关回路的第一输出端与所述整流器的第一正输入端连接，所述第一开关回路的第二输出端与所述整流器的第一负输入端连接，所述第一开关回路的第三输出端与所述整流器的第二负输入端连 接；The input end of the first switch circuit is connected to an internal combustion generator, the first output end of the first switch circuit is connected to the first positive input end of the rectifier, and the second output end of the first switch circuit is connected to The first negative input terminal of the rectifier is connected, and the third output terminal of the first switch loop is connected with the second negative input terminal of the rectifier;
所述整流器的输出端与所述直流回路的输入端并联，所述直流回路的输出端与被供电设备并联；The output terminal of the rectifier is connected in parallel with the input terminal of the DC loop, and the output terminal of the DC loop is connected in parallel with the powered equipment;
所述第二开关回路的输入端与直流电源连接，所述第二开关回路的输出端与所述被供电设备并联。The input end of the second switch loop is connected with a DC power supply, and the output end of the second switch loop is connected in parallel with the powered device.
优选的，所述被供电设备至少包括：牵引逆变电路、辅助逆变电路和直流输出电路中的一种或多种；Preferably, the powered equipment includes at least one or more of a traction inverter circuit, an auxiliary inverter circuit, and a DC output circuit;
所述辅助逆变电路的输入端分别与所述直流回路的输出端和所述第二开关回路的输出端并联；The input terminal of the auxiliary inverter circuit is connected in parallel with the output terminal of the direct current loop and the output terminal of the second switch loop respectively;
所述辅助逆变电路的输出端与交流负载连接，所述辅助逆变电路的输出端与所述直流输出电路的输入端连接，所述直流输出电路的输出端与直流负载连接；The output terminal of the auxiliary inverter circuit is connected to an AC load, the output terminal of the auxiliary inverter circuit is connected to the input terminal of the DC output circuit, and the output terminal of the DC output circuit is connected to a DC load;
所述牵引逆变电路的输入端分别与所述直流回路的输出端和所述第二开关回路的输出端并联，所述牵引逆变电路的输出端分别与n个牵引电机连接，n为正整数。The input terminals of the traction inverter circuit are respectively connected in parallel with the output terminals of the DC loop and the output terminal of the second switching circuit, and the output terminals of the traction inverter circuit are respectively connected with n traction motors, and n is positive. Integer.
优选的，所述直流回路包括：第一电阻、第二电阻、电压传感器和支撑电容；Preferably, the DC loop includes: a first resistor, a second resistor, a voltage sensor, and a supporting capacitor;
所述第一电阻的第一端与所述整流器的正输出端连接，所述第一电阻的第二端与所述第二电阻的第一端连接，所述第二电阻的第二端与所述整流器的负输出端连接；The first end of the first resistor is connected to the positive output end of the rectifier, the second end of the first resistor is connected to the first end of the second resistor, and the second end of the second resistor is connected to the The negative output terminal of the rectifier is connected;
所述电压传感器的第一端与所述整流器的正输出端连接，所述电压传感器的第二端接地，所述电压传感器的第二端与所述第一电阻的第二端连接；The first end of the voltage sensor is connected to the positive output end of the rectifier, the second end of the voltage sensor is grounded, and the second end of the voltage sensor is connected to the second end of the first resistor;
所述支撑电容与所述整流器并联，所述支撑电容分别与所述第二开关回路的输出端和所述被供电设备并联。The supporting capacitor is connected in parallel with the rectifier, and the supporting capacitor is connected in parallel with the output end of the second switching circuit and the powered device respectively.
优选的，所述牵引逆变电路包括：牵引逆变模块、斩波电流传感器和斩波电阻；Preferably, the traction inverter circuit includes: a traction inverter module, a chopping current sensor and a chopping resistance;
所述牵引逆变模块的输入端与所述直流回路的输出端并联，所述斩波电流传感器的第一端接入所述牵引逆变模块，所述斩波电流传感器的第二端通过所述斩波电阻与所述牵引逆变模块的负输入端连接。The input terminal of the traction inverter module is connected in parallel with the output terminal of the DC loop, the first terminal of the chopper current sensor is connected to the traction inverter module, and the second terminal of the chopper current sensor passes through the The chopper resistor is connected to the negative input terminal of the traction inverter module.
优选的，所述辅助逆变电路包括：DC-AC模块和AC-AC模块；Preferably, the auxiliary inverter circuit includes: a DC-AC module and an AC-AC module;
所述DC-AC模块的输入端与所述直流回路的输出端并联，所述DC-AC模块的输出端与所述AC-AC模块的输入端连接，所述AC-AC模块的输出端与所述直流输出电路的输入端连接，所述AC-AC模块的输出端与所述交流负载连接。The input terminal of the DC-AC module is connected in parallel with the output terminal of the DC loop, the output terminal of the DC-AC module is connected with the input terminal of the AC-AC module, and the output terminal of the AC-AC module is connected with The input end of the DC output circuit is connected, and the output end of the AC-AC module is connected to the AC load.
优选的，所述多流制变流器还包括：第三电阻和在交流电网供电模式下闭合的第三交流开关；Preferably, the multi-current converter further includes: a third resistor and a third AC switch closed in the AC power supply mode;
所述第三交流开关的第一端与所述第一个次边绕组的正输出端连接，所述第三交流开关的第二端通过所述第三电阻与所述整流器的第一正输入端连接。The first end of the third AC switch is connected to the positive output end of the first secondary winding, and the second end of the third AC switch is connected to the first positive input of the rectifier through the third resistor端连接。 End connection.
优选的，所述第一开关回路包括：第一三相接触器；Preferably, the first switching circuit includes: a first three-phase contactor;
所述第一三相接触器的W相输入端、V相输入端和U相输入端分别与所述内燃发电机的W相输出端、V相输出端和U相输出端连接；The W-phase input terminal, the V-phase input terminal and the U-phase input terminal of the first three-phase contactor are respectively connected to the W-phase output terminal, the V-phase output terminal and the U-phase output terminal of the internal combustion generator;
所述第一三相接触器的W相输出端与所述整流器的第一正输入端连接，所述第一三相接触器的V相输出端与所述整流器的第一负输入端连接，所述第一三相接触器的 U相输出端与所述整流器的第二负输入端连接。The W-phase output terminal of the first three-phase contactor is connected to the first positive input terminal of the rectifier, and the V-phase output terminal of the first three-phase contactor is connected to the first negative input terminal of the rectifier, The U-phase output terminal of the first three-phase contactor is connected to the second negative input terminal of the rectifier.
优选的，所述第一开关回路还包括：第二三相接触器和第四电阻；Preferably, the first switching circuit further includes: a second three-phase contactor and a fourth resistor;
所述第二三相接触器的W相输入端、V相输入端和U相输入端分别与所述内燃发电机的W相输出端、V相输出端和U相输出端连接；The W-phase input end, the V-phase input end and the U-phase input end of the second three-phase contactor are respectively connected to the W-phase output end, the V-phase output end and the U-phase output end of the internal combustion generator;
所述第二三相接触器的W相输出端、V相输出端和U相输出端分别通过所述第四电阻与所述第二三相接触器的W相输出端、V相输出端和U相输出端连接。The W-phase output terminal, the V-phase output terminal, and the U-phase output terminal of the second three-phase contactor are respectively connected to the W-phase output terminal, the V-phase output terminal and the U-phase output terminal of the second three-phase contactor through the fourth resistor. U-phase output terminal connection.
优选的，所述第二开关回路包括：隔离开关和第一直流开关；Preferably, the second switch circuit includes: an isolating switch and a first DC switch;
所述第一直流开关的第一端与所述直流电源的正输出端连接，所述第一直流开关的第二端与所述隔离开关的第一输入端连接；The first end of the first DC switch is connected to the positive output end of the DC power supply, and the second end of the first DC switch is connected to the first input end of the isolating switch;
所述隔离开关的第二输入端通过电容接地，所述隔离开关的第二输入端与所述直流电源的负输出端连接；The second input terminal of the isolation switch is grounded through a capacitor, and the second input terminal of the isolation switch is connected to the negative output terminal of the DC power supply;
所述隔离开关的第一输出端与所述牵引逆变电路的正输入端连接，所述隔离开关的第二输出端与所述牵引逆变电路的负输入端连接。The first output terminal of the isolation switch is connected with the positive input terminal of the traction inverter circuit, and the second output terminal of the isolation switch is connected with the negative input terminal of the traction inverter circuit.
优选的，所述第二开关回路还包括：第五电阻和直流供电模式下闭合的第二直流开关；Preferably, the second switch circuit further includes: a fifth resistor and a second DC switch closed in the DC power supply mode;
所述第二直流开关的第一端与所述直流电源的正输出端连接，所述第二直流开关的第二端通过所述第五电阻与所述第一直流开关的第二端连接。The first terminal of the second DC switch is connected to the positive output terminal of the DC power supply, and the second terminal of the second DC switch is connected to the second terminal of the first DC switch through the fifth resistor .
基于上述本发明实施例提供的一种多流制变流器，该多流制变流器包括：整流器、直流回路、交流电网供电模式下闭合的第一交流开关和第二交流开关、内燃发电机供电模式下闭合的第一开关回路和直流供电模式下闭合的第二开关回路。本方案中，多流制变流器满足交流电网供电模式、内燃发电机供电模式和直流供电模式，保证动车在运行过程中满足不同的电压制式，同时取消二次滤波电路，简化多流制变流器的结构，降低多流制变流器的体积和重量。Based on the above-mentioned embodiment of the present invention, a multi-current converter is provided. The multi-current converter includes: a rectifier, a DC loop, a first AC switch and a second AC switch closed in an AC grid power supply mode, and internal combustion power generation The first switching circuit closed in the machine power supply mode and the second switching circuit closed in the DC power supply mode. In this scheme, the multi-current converter meets the AC grid power supply mode, the internal combustion generator power supply mode and the DC power supply mode to ensure that the EMU meets different voltage systems during operation. At the same time, the secondary filter circuit is eliminated to simplify the multi-current system transformation. The structure of the flow converter reduces the volume and weight of the multi-flow converter.
附图说明Description of the drawings
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据提供的附图获得其他的附图。In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only It is an embodiment of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without creative work.
图1为本发明实施例提供的一种多流制变流器的结构示意图；Fig. 1 is a schematic structural diagram of a multi-stream converter provided by an embodiment of the present invention;
图2为本发明实施例提供的另一种多流制变流器的结构示意图；Figure 2 is a schematic structural diagram of another multi-flow converter provided by an embodiment of the present invention;
图3为本发明实施例提供的又一种多流制变流器的结构示意图；Figure 3 is a schematic structural diagram of yet another multi-stream converter provided by an embodiment of the present invention;
图4为本发明实施例提供的再一种多流制变流器的结构示意图；Figure 4 is a schematic structural diagram of yet another multi-stream converter provided by an embodiment of the present invention;
图5为本发明实施例提供的多流制变流器的架构示意图。FIG. 5 is a schematic structural diagram of a multi-stream converter provided by an embodiment of the present invention.
本发明实施例中所涉及的元器件的编号为：整流器101、直流回路102、牵引逆变电路103、辅助逆变电路104、直流输出电路105、第一交流开关106、第二交流开关107、第一开关回路108、第二开关回路109、第三电阻110、第三交流开关111、第一 电流传感器112、第二电流传感器113和电容114。The numbers of the components involved in the embodiment of the present invention are: rectifier 101, DC loop 102, traction inverter circuit 103, auxiliary inverter circuit 104, DC output circuit 105, first AC switch 106, second AC switch 107, The first switch circuit 108, the second switch circuit 109, the third resistor 110, the third AC switch 111, the first current sensor 112, the second current sensor 113 and the capacitor 114.
具体实施方式Detailed ways
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
在本申请中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。In this application, the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes no Other elements clearly listed, or also include elements inherent to this process, method, article, or equipment. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, method, article, or equipment that includes the element.
由背景技术可知，动车在运行过程中难免会碰到供电制式的变化，现有的双流制变流器虽然能满足直流和交流两种电压制式。但是该双流制变流器配置多路隔离开关和在直流回路中设计二次滤波电路，而二次滤波电路的电路复杂和元器件数量较大，会造成双流制变流器的体积大、重量重和结构复杂。It can be known from the background technology that the electric train will inevitably encounter a change in the power supply system during operation. Although the existing dual-current converter can meet the two voltage systems of DC and AC. However, the dual-current converter is equipped with multiple isolation switches and the secondary filter circuit is designed in the DC loop. The circuit of the secondary filter circuit is complicated and the number of components is large, which will cause the dual-current converter to be bulky and heavy. Heavy and complex structure.
因此，本发明实施例提供一种多流制变流器，该多流制变流器包括：整流器、直流回路、交流电网供电模式下闭合的第一交流开关和第二交流开关、内燃发电机供电模式下闭合的第一开关回路和直流供电模式下闭合的第二开关回路。在满足不同电压制式的前提下，取消了二次滤波电路，以降低多流制变流器的体积和重量。Therefore, an embodiment of the present invention provides a multi-current converter, which includes: a rectifier, a DC loop, a first AC switch and a second AC switch that are closed in an AC grid power supply mode, and an internal combustion generator The first switching circuit closed in the power supply mode and the second switching circuit closed in the DC power supply mode. Under the premise of meeting different voltage systems, the secondary filter circuit is eliminated to reduce the volume and weight of the multi-flow converter.
参见图1，示出了本发明实施例提供的一种多流制变流器的结构示意图，所述多流制变流器包括：整流器101、直流回路102、交流电网供电模式下闭合的第一交流开关106和第二交流开关107、内燃发电机供电模式下闭合的第一开关回路108、直流供电模式下闭合的第二开关回路109。Referring to FIG. 1, there is shown a schematic structural diagram of a multi-current converter provided by an embodiment of the present invention. The multi-current converter includes: a rectifier 101, a DC loop 102, and a second closed circuit in AC grid power supply mode. An AC switch 106 and a second AC switch 107, a first switching circuit 108 closed in the power supply mode of the internal combustion generator, and a second switching circuit 109 closed in the DC power supply mode.
所述第一交流开关106的第一端与第一个次边绕组的正输出端(如图1中的s1端)连接，所述第一交流开关106的第二端与所述整流器101的第一正输入端连接，所述整流器101的第一负输入端与所述第一个次边绕组的负输出端(如图1中的s2端)连接。The first terminal of the first AC switch 106 is connected to the positive output terminal of the first secondary winding (the s1 terminal in FIG. 1), and the second terminal of the first AC switch 106 is connected to the rectifier 101 The first positive input terminal is connected, and the first negative input terminal of the rectifier 101 is connected to the negative output terminal of the first secondary winding (the s2 terminal in FIG. 1).
所述第二交流开关107的第一端与第二个次边绕组的正输出端(如图1中的s3端)连接，所述第二交流开关107的第二端与所述整流器101的第二正输入端连接，所述整流器101的第二负输入端与所述第二个次边绕组的负输出端(如图1中的s4端)连接。The first end of the second AC switch 107 is connected to the positive output end of the second secondary winding (the s3 end in FIG. 1), and the second end of the second AC switch 107 is connected to the rectifier 101 The second positive input terminal is connected, and the second negative input terminal of the rectifier 101 is connected to the negative output terminal of the second secondary winding (terminal s4 in FIG. 1).
所述第一开关回路108的输入端与内燃发电机连接，所述第一开关回路108的第一输出端与所述整流器101的第一正输入端连接，所述第一开关回路108的第二输出端与所述整流器101的第一负输入端连接，所述第一开关回路108的第三输出端与所述整流器101的第二负输入端连接。The input terminal of the first switch circuit 108 is connected to an internal combustion generator, the first output terminal of the first switch circuit 108 is connected to the first positive input terminal of the rectifier 101, and the first switch circuit 108 is connected to the first positive input terminal of the rectifier 101. The second output terminal is connected to the first negative input terminal of the rectifier 101, and the third output terminal of the first switch circuit 108 is connected to the second negative input terminal of the rectifier 101.
所述整流器101的输出端与所述直流回路102的输入端并联，所述直流回路102的输出端与被供电设备并联。The output terminal of the rectifier 101 is connected in parallel with the input terminal of the DC loop 102, and the output terminal of the DC loop 102 is connected in parallel with the powered device.
所述第二开关回路109的输入端与直流电源(也可称为直流供电网)连接，所述第 二开关回路109的输出端与所述被供电设备并联。The input end of the second switch circuit 109 is connected to a DC power supply (also referred to as a DC power supply network), and the output end of the second switch circuit 109 is connected in parallel with the powered device.
需要说明的是，所述直流电源的负输出端通过电容114接地。It should be noted that the negative output terminal of the DC power supply is grounded through a capacitor 114.
所述多流制变流器满足交流电网供电模式、内燃发电机供电模式和直流供电模式等多种供电制式，为更好解释说明在不同的供电制式下所述多流制变流器的工作状态，通过以下内容进行说明。The multi-current converter meets multiple power supply modes such as AC grid power supply mode, internal combustion generator power supply mode, and DC power supply mode, etc., in order to better explain the operation of the multi-current converter under different power supply modes The status is explained by the following.
交流电网供电模式：交流电网的交流输入电压经过牵引变压器变压后，经过两个所述次边绕组(s1/s2，s3/s4)进入所述多流制变流器。通过所述第一交流开关106和所述第二交流开关107将单相交流输入电压输入所述整流器101。AC grid power supply mode: After the AC input voltage of the AC grid is transformed by the traction transformer, it enters the multi-current converter through the two secondary windings (s1/s2, s3/s4). The single-phase AC input voltage is input to the rectifier 101 through the first AC switch 106 and the second AC switch 107.
需要说明的是，所述图1中的牵引变压器连接的U相和V相仅用于举例说明。It should be noted that the U-phase and V-phase connected to the traction transformer in FIG. 1 are only for illustration.
所述整流器101将该单相交流输入电压转换成直流输入电压，并通过所述直流回路102将直流输入电压传输给所述被供电设备，为所述被供电设备供电。The rectifier 101 converts the single-phase AC input voltage into a DC input voltage, and transmits the DC input voltage to the powered device through the DC loop 102 to supply power to the powered device.
内燃发电机供电模式：内燃发电机输出的三相交流电经过所述第一开关回路108输入所述整流器101，所述整流器101将所述三相交流电转换成直流输入电压，并通过所述直流回路102将直流输入电压传输给所述被供电设备，为所述被供电设备供电。Internal combustion generator power supply mode: the three-phase AC power output by the internal combustion generator is input to the rectifier 101 through the first switching circuit 108, and the rectifier 101 converts the three-phase AC power into a DC input voltage and passes through the DC circuit 102 transmits the DC input voltage to the powered device to supply power to the powered device.
需要说明的是，在所述整流器101内部，通过绝缘栅双极型晶体管(Insulated Gate Bipolar Transistor，IGBT)反并联二极管，实现三相不可控整流。It should be noted that inside the rectifier 101, an insulated gate bipolar transistor (IGBT) anti-parallel diode is used to realize three-phase uncontrollable rectification.
直流供电模式：直流电源通过所述第二开关回路109将直流输入电压传输给所述被供电设备，为所述被供电设备供电。DC power supply mode: the DC power supply transmits the DC input voltage to the powered device through the second switch circuit 109 to supply power to the powered device.
在本发明实施例中，多流制变流器满足交流电网供电模式、内燃发电机供电模式和直流供电模式等不同的供电制式，保证动车在运行过程中满足不同的电压制式。同时，该多流制变流器取消二次滤波电路，简化多流制变流器的结构，降低多流制变流器的体积和重量。In the embodiment of the present invention, the multi-current converter meets different power supply modes such as AC grid power supply mode, internal combustion generator power supply mode, and DC power supply mode, so as to ensure that the EMU meets different voltage systems during operation. At the same time, the multi-flow converter eliminates the secondary filter circuit, simplifies the structure of the multi-flow converter, and reduces the volume and weight of the multi-flow converter.
所述被供电设备至少包括：牵引逆变电路103、辅助逆变电路104和直流输出电路105中的一种或多种。参见图2，示出了本发明实施例提供的一种多流制变流器的结构示意图。The powered equipment includes at least one or more of the traction inverter circuit 103, the auxiliary inverter circuit 104, and the DC output circuit 105. Referring to Fig. 2, there is shown a schematic structural diagram of a multi-flow converter provided by an embodiment of the present invention.
所述辅助逆变电路104的输入端分别与所述直流回路102的输出端和所述第二开关回路109的输出端并联。也就是说，所述辅助逆变电路104的输入端与所述直流回路102的输出端并联，所述辅助逆变电路104的输入端与所述第二开关回路109的输出端并联。The input terminal of the auxiliary inverter circuit 104 is connected in parallel with the output terminal of the DC loop 102 and the output terminal of the second switch loop 109 respectively. That is to say, the input terminal of the auxiliary inverter circuit 104 is connected in parallel with the output terminal of the DC loop 102, and the input terminal of the auxiliary inverter circuit 104 is connected in parallel with the output terminal of the second switch circuit 109.
所述辅助逆变电路104的输出端与交流负载连接，所述辅助逆变电路104的输出端与所述直流输出电路105的输入端连接，所述直流输出电路105的输出端与直流负载连接。The output terminal of the auxiliary inverter circuit 104 is connected to an AC load, the output terminal of the auxiliary inverter circuit 104 is connected to the input terminal of the DC output circuit 105, and the output terminal of the DC output circuit 105 is connected to a DC load .
所述牵引逆变电路103的输入端分别与所述直流回路102的输出端和所述第二开关回路109的输出端并联，所述牵引逆变电路103的输出端分别与n个牵引电机连接(例如图2中的M1和M2)，n为正整数。也就是说，所述牵引逆变电路103的输入端与所述直流回路102的输出端并联，所述牵引逆变电路103的输入端与所述第二开关回路109的输出端并联。The input terminal of the traction inverter circuit 103 is connected in parallel with the output terminal of the DC circuit 102 and the output terminal of the second switch circuit 109, respectively, and the output terminal of the traction inverter circuit 103 is respectively connected with n traction motors (For example, M1 and M2 in Figure 2), n is a positive integer. That is, the input terminal of the traction inverter circuit 103 is connected in parallel with the output terminal of the DC loop 102, and the input terminal of the traction inverter circuit 103 is connected in parallel with the output terminal of the second switch circuit 109.
需要说明的是，所述直流输出电路105用于将交流电压转换为直流电压，即所述直 流输出电路105可为AC-DC模块。所述直流输出电路105还可用于为蓄电池供电，即该直流输出电路105的输出端也可与蓄电池连接。It should be noted that the DC output circuit 105 is used to convert AC voltage into a DC voltage, that is, the DC output circuit 105 may be an AC-DC module. The DC output circuit 105 can also be used to supply power to the battery, that is, the output terminal of the DC output circuit 105 can also be connected to the battery.
所述多流制变流器满足交流电网供电模式、内燃发电机供电模式和直流供电模式等多种供电制式，为更好解释说明在不同的供电制式下所述多流制变流器的工作状态，通过以下内容进行说明。The multi-current converter meets multiple power supply modes such as AC grid power supply mode, internal combustion generator power supply mode, and DC power supply mode, etc., in order to better explain the operation of the multi-current converter under different power supply modes The status is explained by the following.
交流电网供电模式：交流电网的交流输入电压经过牵引变压器变压后，经过两个所述次边绕组(s1/s2，s3/s4)进入所述多流制变流器。通过所述第一交流开关106和所述第二交流开关107将单相交流输入电压输入所述整流器101。AC grid power supply mode: After the AC input voltage of the AC grid is transformed by the traction transformer, it enters the multi-current converter through the two secondary windings (s1/s2, s3/s4). The single-phase AC input voltage is input to the rectifier 101 through the first AC switch 106 and the second AC switch 107.
需要说明的是，所述图2中的牵引变压器连接的U相和V相仅用于举例说明。It should be noted that the U-phase and V-phase connected to the traction transformer in FIG. 2 are only for illustration.
所述整流器101将该单相交流输入电压转换成直流输入电压，并通过所述直流回路102将直流输入电压输入所述牵引逆变电路103和所述辅助逆变电路104。所述牵引逆变电路103对该直流输入电压进行相应处理后为n个所述牵引电机供电。The rectifier 101 converts the single-phase AC input voltage into a DC input voltage, and inputs the DC input voltage into the traction inverter circuit 103 and the auxiliary inverter circuit 104 through the DC loop 102. The traction inverter circuit 103 performs corresponding processing on the DC input voltage and supplies power to the n traction motors.
所述辅助逆变电路104对该直流输入电压进行相应处理后输入所述直流输出电路105，以及为交流负载供电。所述直流输出电路105为直流负载供电。The auxiliary inverter circuit 104 performs corresponding processing on the DC input voltage and then inputs it to the DC output circuit 105, and supplies power to the AC load. The DC output circuit 105 supplies power to the DC load.
内燃发电机供电模式：内燃发电机输出的三相交流电经过所述第一开关回路108输入所述整流器101，所述整流器101将所述三相交流电转换成直流输入电压，所述牵引逆变电路103、所述辅助逆变电路104和所述直流输出电路105对该直流输入电压的处理过程，可参见上述交流电网供电模式的相关内容，在此不再进行赘述。Internal combustion generator power supply mode: the three-phase AC power output by the internal combustion generator is input to the rectifier 101 through the first switch circuit 108, and the rectifier 101 converts the three-phase AC power into a DC input voltage, and the traction inverter circuit 103. The processing process of the auxiliary inverter circuit 104 and the DC output circuit 105 on the DC input voltage can be referred to the related content of the AC grid power supply mode described above, which will not be repeated here.
需要说明的是，在所述整流器101内部，通过绝缘栅双极型晶体管(Insulated Gate Bipolar Transistor，IGBT)反并联二极管，实现三相不可控整流。It should be noted that inside the rectifier 101, an insulated gate bipolar transistor (IGBT) anti-parallel diode is used to realize three-phase uncontrollable rectification.
直流供电模式：直流电源通过所述第二开关回路109将直流输入电压分别输入所述牵引逆变电路103、所述辅助逆变电路104和所述直流输出电路105，所述牵引逆变电路103、所述辅助逆变电路104和所述直流输出电路105对该直流输入电压的处理过程，可参见上述交流电网供电模式的相关内容，在此不再进行赘述。DC power supply mode: the DC power supply inputs the DC input voltage into the traction inverter circuit 103, the auxiliary inverter circuit 104, and the DC output circuit 105 through the second switch circuit 109, and the traction inverter circuit 103 For the processing process of the auxiliary inverter circuit 104 and the DC output circuit 105 on the DC input voltage, please refer to the related content of the AC grid power supply mode described above, which will not be repeated here.
在本发明实施例中，多流制变流器满足交流电网供电模式、内燃发电机供电模式和直流供电模式等不同的供电制式，保证动车在运行过程中满足不同的电压制式。同时，该多流制变流器取消二次滤波电路，简化多流制变流器的结构，降低多流制变流器的体积和重量。In the embodiment of the present invention, the multi-current converter meets different power supply modes such as AC grid power supply mode, internal combustion generator power supply mode, and DC power supply mode, so as to ensure that the EMU meets different voltage systems during operation. At the same time, the multi-flow converter eliminates the secondary filter circuit, simplifies the structure of the multi-flow converter, and reduces the volume and weight of the multi-flow converter.
优选的，结合图2，参见图3，示出了本发明实施例提供的另一种多流制变流器的结构示意图。Preferably, referring to Fig. 2 and Fig. 3, there is shown a schematic structural diagram of another multi-flow converter provided by an embodiment of the present invention.
所述直流回路102包括：第一电阻1021、第二电阻1022、电压传感器1023和支撑电容1024。The DC loop 102 includes a first resistor 1021, a second resistor 1022, a voltage sensor 1023 and a supporting capacitor 1024.
所述第一电阻1021的第一端与所述整流器101的正输出端连接，所述第一电阻1021的第二端与所述第二电阻1022的第一端连接，所述第二电阻1022的第二端与所述整流器101的负输出端连接。The first end of the first resistor 1021 is connected to the positive output end of the rectifier 101, the second end of the first resistor 1021 is connected to the first end of the second resistor 1022, and the second resistor 1022 is The second terminal of is connected to the negative output terminal of the rectifier 101.
所述电压传感器1023的第一端与所述整流器101的正输出端连接，所述电压传感器1023的第二端接地，所述电压传感器1023的第二端与所述第一电阻1021的第二端连接。The first terminal of the voltage sensor 1023 is connected to the positive output terminal of the rectifier 101, the second terminal of the voltage sensor 1023 is grounded, and the second terminal of the voltage sensor 1023 is connected to the second terminal of the first resistor 1021.端连接。 End connection.
所述支撑电容1024与所述整流器101并联，所述支撑电容1024分别与所述第二开关回路109的输出端、所述牵引逆变电路103的输入端和所述辅助逆变电路104的输入端并联。The supporting capacitor 1024 is connected in parallel with the rectifier 101, and the supporting capacitor 1024 is connected to the output terminal of the second switching circuit 109, the input terminal of the traction inverter circuit 103, and the input terminal of the auxiliary inverter circuit 104, respectively. The ends are connected in parallel.
需要说明的是，所述第一电阻1021、所述第二电阻1022和所述支撑电容1024构成滤波储能电路。由于整车N线悬空，所述电压传感器1023也可用于提供接地检测功能。It should be noted that the first resistor 1021, the second resistor 1022, and the supporting capacitor 1024 constitute a filter tank circuit. Since the N line of the vehicle is suspended, the voltage sensor 1023 can also be used to provide a grounding detection function.
所述牵引逆变电路103包括：牵引逆变模块1031(INV)、斩波电流传感器1032和斩波电阻1033。The traction inverter circuit 103 includes: a traction inverter module 1031 (INV), a chopping current sensor 1032, and a chopping resistor 1033.
所述牵引逆变模块1031(INV)的输入端与所述直流回路102的输出端并联，所述斩波电流传感器1032的第一端接入所述牵引逆变模块1031，所述斩波电流传感器1032的第二端通过所述斩波电阻1033与所述牵引逆变模块1031的负输入端连接。The input end of the traction inverter module 1031 (INV) is connected in parallel with the output end of the DC loop 102, the first end of the chopping current sensor 1032 is connected to the traction inverter module 1031, and the chopping current The second terminal of the sensor 1032 is connected to the negative input terminal of the traction inverter module 1031 through the chopper resistor 1033.
可以理解的是，所述斩波电流传感器1032的第一端与所述牵引逆变模块1031的斩波管连接。It can be understood that the first end of the chopper current sensor 1032 is connected to the chopper tube of the traction inverter module 1031.
需要说明的是，在所述牵引逆变模块1031的内部设置所述斩波管，该斩波管用于将直流电压快速释放。It should be noted that the chopper tube is provided inside the traction inverter module 1031, and the chopper tube is used to quickly release the DC voltage.
所述辅助逆变电路104包括：DC-AC模块1041和AC-AC模块1042。The auxiliary inverter circuit 104 includes: a DC-AC module 1041 and an AC-AC module 1042.
所述DC-AC模块1041的输入端与所述直流回路102的输出端并联，所述DC-AC模块1041的输出端与所述AC-AC模块1042的输入端连接，所述AC-AC模块1042的输出端与所述直流输出电路105的输入端连接，所述AC-AC模块1042的输出端与所述交流负载连接。The input end of the DC-AC module 1041 is connected in parallel with the output end of the DC loop 102, the output end of the DC-AC module 1041 is connected to the input end of the AC-AC module 1042, and the AC-AC module The output terminal of 1042 is connected to the input terminal of the DC output circuit 105, and the output terminal of the AC-AC module 1042 is connected to the AC load.
需要说明的是，所述AC-AC模块1042用于将交流输入电压转换成符合预设要求的交流电，为交流负载供电。It should be noted that the AC-AC module 1042 is used to convert the AC input voltage into AC power that meets the preset requirements to supply power to the AC load.
所述第一开关回路108包括：第一三相接触器1081。The first switch circuit 108 includes: a first three-phase contactor 1081.
所述第一三相接触器1081的W相输入端、V相输入端和U相输入端分别与所述内燃发电机的W相输出端、V相输出端和U相输出端连接。The W-phase input end, V-phase input end, and U-phase input end of the first three-phase contactor 1081 are respectively connected to the W-phase output end, V-phase output end and U-phase output end of the internal combustion generator.
所述第一三相接触器1081的W相输出端与所述整流器101的第一正输入端连接，所述第一三相接触器1081的V相输出端与所述整流器101的第一负输入端连接，所述第一三相接触器1081的U相输出端与所述整流器101的第二负输入端连接。The W-phase output terminal of the first three-phase contactor 1081 is connected to the first positive input terminal of the rectifier 101, and the V-phase output terminal of the first three-phase contactor 1081 is connected to the first negative terminal of the rectifier 101. The input terminal is connected, and the U-phase output terminal of the first three-phase contactor 1081 is connected to the second negative input terminal of the rectifier 101.
所述第二开关回路109包括：隔离开关1091和第一直流开关1092。The second switch circuit 109 includes: an isolating switch 1091 and a first DC switch 1092.
所述第一直流开关1092的第一端与所述直流电源的正输出端连接，所述第一直流开关1092的第二端与所述隔离开关1091的第一输入端连接。The first terminal of the first DC switch 1092 is connected to the positive output terminal of the DC power supply, and the second terminal of the first DC switch 1092 is connected to the first input terminal of the isolating switch 1091.
所述隔离开关1091的第二输入端通过所述电容114接地，所述隔离开关1091的第二输入端与所述直流电源的负输出端连接。The second input terminal of the isolation switch 1091 is grounded through the capacitor 114, and the second input terminal of the isolation switch 1091 is connected to the negative output terminal of the DC power supply.
所述隔离开关1091的第一输出端与所述牵引逆变电路103的正输入端连接，所述隔离开关1091的第二输出端与所述牵引逆变电路103的负输入端连接。The first output terminal of the isolation switch 1091 is connected to the positive input terminal of the traction inverter circuit 103, and the second output terminal of the isolation switch 1091 is connected to the negative input terminal of the traction inverter circuit 103.
相应的，所述多流制变流器满足交流电网供电模式、内燃发电机供电模式和直流供电模式等多种供电制式，为更好解释说明在不同的供电制式下所述多流制变流器的工作状态，通过以下内容进行说明。Correspondingly, the multi-current converter meets multiple power supply modes such as AC grid power supply mode, internal combustion generator power supply mode, and DC power supply mode. In order to better explain the multi-current converter under different power supply modes The working status of the device is explained through the following content.
交流电网供电模式：交流电网的交流输入电压经过牵引变压器变压后，经过两个所述次边绕组(s1/s2，s3/s4)进入所述多流制变流器。通过所述第一交流开关106和所述第二交流开关107将单相交流输入电压输入所述整流器101。AC grid power supply mode: After the AC input voltage of the AC grid is transformed by the traction transformer, it enters the multi-current converter through the two secondary windings (s1/s2, s3/s4). The single-phase AC input voltage is input to the rectifier 101 through the first AC switch 106 and the second AC switch 107.
由前述内容可知，所述第一电阻1021、所述第二电阻1022和所述支撑电容1024构成所述滤波储能电路。It can be seen from the foregoing that the first resistor 1021, the second resistor 1022, and the supporting capacitor 1024 constitute the filter tank circuit.
所述整流器101将该单相交流输入电压转换成直流输入电压，并通过所述滤波储能电路将直流输入电压输入所述牵引逆变模块1031和所述DC-AC模块1041。The rectifier 101 converts the single-phase AC input voltage into a DC input voltage, and inputs the DC input voltage into the traction inverter module 1031 and the DC-AC module 1041 through the filter energy storage circuit.
所述牵引逆变模块1031对该直流输入电压进行相应处理后为n个所述牵引电机供电。所述DC-AC模块1041将该直流输入电压转换为交流输入电压，并通过所述AC-AC模块1042将该交流输入电压转换成符合预设要求的交流电，为交流负载供电。The traction inverter module 1031 performs corresponding processing on the DC input voltage and supplies power to the n traction motors. The DC-AC module 1041 converts the DC input voltage into an AC input voltage, and the AC-AC module 1042 converts the AC input voltage into an AC power meeting a preset requirement to supply power to the AC load.
所述AC-AC模块1042将该符合预设要求的交流电输入所述直流输出电路105，所述直流输出电路105将该交流电转换为直流电后为直流负载供电。The AC-AC module 1042 inputs the alternating current that meets the preset requirements into the direct current output circuit 105, and the direct current output circuit 105 converts the alternating current into direct current to supply power to the direct current load.
内燃发电机供电模式：内燃发电机输出的三相交流电经过所述第一三相接触器1081输入所述整流器101，所述整流器101将该三相交流电转换成直流输入电压的后续内容，请参见上述交流电网供电模式的相关内容，在此不再进行赘述。Internal combustion generator power supply mode: the three-phase AC power output by the internal combustion generator is input to the rectifier 101 through the first three-phase contactor 1081, and the rectifier 101 converts the three-phase AC power into a DC input voltage for subsequent content, please refer to The related content of the above-mentioned AC grid power supply mode will not be repeated here.
直流供电模式：直流电源通过所述第一直流开关1092和所述隔离开关1091，分别将直流输入电压输入所述牵引逆变模块1031和所述DC-AC模块1041，所述牵引逆变模块1031和所述DC-AC模块1041对该直流输入电压的后续处理过程，可参见上述交流电网供电模式的相关内容，在此不再进行赘述。DC power supply mode: the DC power supply inputs the DC input voltage into the traction inverter module 1031 and the DC-AC module 1041 through the first DC switch 1092 and the isolating switch 1091, respectively, and the traction inverter module For the subsequent processing of the DC input voltage by the DC-AC module 1031 and the DC-AC module 1041, please refer to the related content of the AC power supply mode described above, which will not be repeated here.
在本发明实施例中，多流制变流器满足交流电网供电模式、内燃发电机供电模式和直流供电模式等不同的供电制式，保证动车在运行过程中满足不同的电压制式。同时，该多流制变流器取消二次滤波电路，简化多流制变流器的结构，降低多流制变流器的体积和重量。In the embodiment of the present invention, the multi-current converter meets different power supply modes such as AC grid power supply mode, internal combustion generator power supply mode, and DC power supply mode, so as to ensure that the EMU meets different voltage systems during operation. At the same time, the multi-flow converter eliminates the secondary filter circuit, simplifies the structure of the multi-flow converter, and reduces the volume and weight of the multi-flow converter.
优选的，结合图3，参见图4，示出了本发明实施例提供的又一种多流制变流器的结构示意图。Preferably, referring to Fig. 3 and Fig. 4, there is shown a schematic structural diagram of yet another multi-flow converter provided by an embodiment of the present invention.
所述多流制变流器还包括：第三电阻110和在交流电网供电模式下闭合的第三交流开关111。The multi-current converter further includes: a third resistor 110 and a third AC switch 111 closed in the AC grid power supply mode.
所述第三交流开关111的第一端与所述第一个次边绕组的正输出端连接，所述第三交流开关111的第二端通过所述第三电阻110与所述整流器101的第一正输入端连接。The first terminal of the third AC switch 111 is connected to the positive output terminal of the first secondary winding, and the second terminal of the third AC switch 111 is connected to the rectifier 101 through the third resistor 110 The first positive input terminal is connected.
需要说明的是，所述第一交流开关106、第三交流开关111和所述第三电阻110构成充电短接电路。It should be noted that the first AC switch 106, the third AC switch 111 and the third resistor 110 constitute a charging short circuit.
所述第一开关回路108还包括：第二三相接触器1082和第四电阻1083。The first switch circuit 108 further includes: a second three-phase contactor 1082 and a fourth resistor 1083.
所述第二三相接触器1082的W相输入端、V相输入端和U相输入端分别与所述内燃发电机的W相输出端、V相输出端和U相输出端连接。The W-phase input end, V-phase input end, and U-phase input end of the second three-phase contactor 1082 are respectively connected to the W-phase output end, V-phase output end and U-phase output end of the internal combustion generator.
所述第二三相接触器1082的W相输出端、V相输出端和U相输出端分别通过所述第四电阻1083与所述第二三相接触器1082的W相输出端、V相输出端和U相输出端连接。The W-phase output terminal, the V-phase output terminal, and the U-phase output terminal of the second three-phase contactor 1082 are connected to the W-phase output terminal and the V-phase output terminal of the second three-phase contactor 1082 through the fourth resistor 1083, respectively. The output terminal is connected to the U-phase output terminal.
所述第二开关回路109还包括：第五电阻1093和直流供电模式下闭合的第二直流开 关1094。The second switch circuit 109 further includes: a fifth resistor 1093 and a second DC switch 1094 closed in the DC power supply mode.
所述第二直流开关1094的第一端与所述直流电源的正输出端连接，所述第二直流开关1094的第二端通过所述第五电阻1093与所述第一直流开关1092的第二端连接。The first terminal of the second DC switch 1094 is connected to the positive output terminal of the DC power supply, and the second terminal of the second DC switch 1094 is connected to the first DC switch 1092 through the fifth resistor 1093. The second end is connected.
所述多流制变流器还包括：第一电流传感器112和第二电流传感器113；The multi-flow converter further includes: a first current sensor 112 and a second current sensor 113;
所述第一电流传感器112的第一端与所述第二个次边绕组的负输出端连接，所述第一电流传感器112的第二端与所述整流器101的第二负输入端连接。The first end of the first current sensor 112 is connected to the negative output end of the second secondary winding, and the second end of the first current sensor 112 is connected to the second negative input end of the rectifier 101.
所述第二电流传感器113的第一端与所述第一个次边绕组的负输出端连接，所述第二电流传感器113的第二端与所述整流器101的第一负输入端连接。The first end of the second current sensor 113 is connected to the negative output end of the first secondary winding, and the second end of the second current sensor 113 is connected to the first negative input end of the rectifier 101.
相应的，所述多流制变流器满足交流电网供电模式、内燃发电机供电模式和直流供电模式等多种供电制式，为更好解释说明在不同的供电制式下所述多流制变流器的工作状态，通过以下内容进行说明。Correspondingly, the multi-current converter meets multiple power supply modes such as AC grid power supply mode, internal combustion generator power supply mode, and DC power supply mode. In order to better explain the multi-current converter under different power supply modes The working status of the device is explained through the following content.
由前述内容可知，所述第一交流开关106、第三交流开关111和所述第三电阻110构成充电短接电路。It can be known from the foregoing that the first AC switch 106, the third AC switch 111 and the third resistor 110 constitute a charging short circuit.
交流电网供电模式：交流电网的交流输入电压经过牵引变压器变压后，经过两个所述次边绕组(s1/s2，s3/s4)进入所述多流制变流器。通过所述充电短接电路、所述第二交流开关107、所述第一电流传感器112和所述第二电流传感器113将单相交流输入电压输入所述整流器101。AC grid power supply mode: After the AC input voltage of the AC grid is transformed by the traction transformer, it enters the multi-current converter through the two secondary windings (s1/s2, s3/s4). The single-phase AC input voltage is input to the rectifier 101 through the charging short circuit, the second AC switch 107, the first current sensor 112, and the second current sensor 113.
需要说明的是，在交流电网供电模式下，所述充电短接电路的元器件开合状态为：先闭合所述第三交流开关111，此时所述第一交流开关106断开，待所述支撑电容1024的电压上升至预设电压值时，闭合所述第一交流开关106，断开所述第三交流开关111。It should be noted that, in the AC grid power supply mode, the switching state of the components of the charging short circuit is: first close the third AC switch 111, at this time the first AC switch 106 is opened, and wait until the When the voltage of the supporting capacitor 1024 rises to a preset voltage value, the first AC switch 106 is closed, and the third AC switch 111 is opened.
由前述内容可知，所述第一电阻1021、所述第二电阻1022和所述支撑电容1024构成所述滤波储能电路。It can be seen from the foregoing that the first resistor 1021, the second resistor 1022, and the supporting capacitor 1024 constitute the filter tank circuit.
所述整流器101将该单相交流输入电压转换成直流输入电压，并通过所述滤波储能电路将直流输入电压输入所述牵引逆变模块1031和所述DC-AC模块1041。The rectifier 101 converts the single-phase AC input voltage into a DC input voltage, and inputs the DC input voltage into the traction inverter module 1031 and the DC-AC module 1041 through the filter energy storage circuit.
所述牵引逆变模块1031对该直流输入电压进行相应处理后为n个所述牵引电机供电。所述DC-AC模块1041将该直流输入电压转换为交流输入电压，并通过所述AC-AC模块1042将该交流输入电压转换成符合预设要求的交流电，为交流负载供电。The traction inverter module 1031 performs corresponding processing on the DC input voltage and supplies power to the n traction motors. The DC-AC module 1041 converts the DC input voltage into an AC input voltage, and the AC-AC module 1042 converts the AC input voltage into an AC power meeting a preset requirement to supply power to the AC load.
所述AC-AC模块1042将该符合预设要求的交流电输入所述直流输出电路105，所述直流输出电路105将该交流电转换为直流电后为直流负载供电。The AC-AC module 1042 inputs the alternating current that meets the preset requirements into the direct current output circuit 105, and the direct current output circuit 105 converts the alternating current into direct current to supply power to the direct current load.
内燃发电机供电模式：内燃发电机输出的三相交流电经过所述第一三相接触器1081、所述第二三相接触器1082和所述第四电阻1083输入所述整流器101，所述整流器101将该三相交流电转换成直流输入电压的后续内容，请参见上述交流电网供电模式的相关内容，在此不再进行赘述。Power supply mode of the internal combustion generator: the three-phase alternating current output by the internal combustion generator passes through the first three-phase contactor 1081, the second three-phase contactor 1082 and the fourth resistor 1083 into the rectifier 101, and the rectifier For the subsequent content of converting the three-phase AC power into DC input voltage, please refer to the related content of the AC grid power supply mode described above, which will not be repeated here.
需要说明的是，在内燃发电机供电模式下，所述第一三相接触器1081和所述第二三相接触器1082的开合状态为：先闭合所述第二三相接触器1082，此时所述第一三相接触器1081断开，待所述支撑电容1024的电压上升至预设电压值时，闭合所述第一三相接触器1081，断开所述第二三相接触器1082。It should be noted that, in the power supply mode of the internal combustion generator, the opening and closing states of the first three-phase contactor 1081 and the second three-phase contactor 1082 are: first close the second three-phase contactor 1082, At this time, the first three-phase contactor 1081 is disconnected, and when the voltage of the supporting capacitor 1024 rises to a preset voltage value, the first three-phase contactor 1081 is closed, and the second three-phase contact is disconnected器1082.
直流供电模式：直流电源通过所述第一直流开关1092、所述第二直流开关1094、所述第五电阻1093和所述隔离开关1091分别将直流输入电压输入所述牵引逆变模块1031和所述DC-AC模块1041，所述牵引逆变模块1031和所述DC-AC模块1041对该直流输入电压的后续处理过程，可参见上述交流电网供电模式的相关内容，在此不再进行赘述。DC power supply mode: the DC power supply inputs the DC input voltage into the traction inverter module 1031 and the traction inverter module 1031 through the first DC switch 1092, the second DC switch 1094, the fifth resistor 1093, and the isolating switch 1091, respectively For the subsequent processing of the DC-AC module 1041, the traction inverter module 1031, and the DC-AC module 1041 on the DC input voltage, please refer to the relevant content of the AC grid power supply mode mentioned above, and will not be repeated here. .
需要说明的是，在所述直流供电模式下，所述第一直流开关1092和所述第二直流开关1094的开合状态为：先闭合所述第二直流开关1094，此时所述第一直流开关1092断开，待所述支撑电容1024的电压上升至预设电压值时，闭合所述第一直流开关1092，断开所述第二直流开关1094。It should be noted that in the DC power supply mode, the opening and closing states of the first DC switch 1092 and the second DC switch 1094 are: first close the second DC switch 1094, and then the first DC switch 1094 A DC switch 1092 is opened, and when the voltage of the supporting capacitor 1024 rises to a preset voltage value, the first DC switch 1092 is closed, and the second DC switch 1094 is opened.
为更好解释说明上述涉及的所述多流制变流器的功能，通过图5示出的多流制的多流制变流器的架构示意图进行举例说明，需要说明的是，所述图5示出的内容仅用于举例说明。In order to better explain the functions of the above-mentioned multi-flow converter, the structure diagram of the multi-flow multi-flow converter shown in FIG. 5 is used as an example. It should be noted that the figure The content shown in 5 is for illustration only.
结合图5示出的内容，在动车牵引模式下，电压从交流供电网、内燃发电机或直流供电网输入所述多流制变流器，所述多流制变流器为牵引电机、交流负载和直流负载供电。With reference to the content shown in Figure 5, in the EMU traction mode, the voltage is input from the AC power supply network, the internal combustion generator or the DC power supply network to the multi-current converter, and the multi-current converter is a traction motor, an AC Load and DC load power supply.
如图5，当所述多流制变流器的供电模式为交流电网供电模式时，电压也可从交流供电网流向直流供电网，为直流供电网的相关储能设备(例如动力电池)充电。As shown in Figure 5, when the power supply mode of the multi-current converter is the AC power supply mode, the voltage can also flow from the AC power supply network to the DC power supply network to charge related energy storage equipment (such as power batteries) in the DC power supply network. .
相应的，当所述多流制变流器的供电模式为内燃发电机供电模式时，电压也可从内燃发电机流向直流供电网，为直流供电网的相关储能设备(例如动力电池)充电。Correspondingly, when the power supply mode of the multi-flow converter is the power supply mode of the internal combustion generator, the voltage can also flow from the internal combustion generator to the DC power supply network to charge related energy storage devices (such as power batteries) in the DC power supply network. .
在动车制动模式下，制动所产生的能量从牵引电机通过所述多流制变流器反馈至交流供电网、直流供电网、直流负载和交流负载，减少制动电阻消耗的能量。In the EMU braking mode, the energy generated by braking is fed back from the traction motor to the AC power supply network, the DC power supply network, the DC load and the AC load through the multi-current converter, so as to reduce the energy consumed by the braking resistor.
综上所述，本发明实施例提供一种多流制变流器，该多流制变流器包括：整流器、直流回路、交流电网供电模式下闭合的第一交流开关和第二交流开关、内燃发电机供电模式下闭合的第一开关回路和直流供电模式下闭合的第二开关回路。本方案中，多流制变流器满足交流电网供电模式、内燃发电机供电模式和直流供电模式，保证动车在运行过程中满足不同的电压制式，同时取消二次滤波电路，简化多流制变流器的结构，降低多流制变流器的体积和重量。In summary, the embodiment of the present invention provides a multi-current converter, which includes: a rectifier, a DC loop, a first AC switch and a second AC switch that are closed in the AC grid power supply mode, The first switching circuit closed in the power supply mode of the internal combustion generator and the second switching circuit closed in the DC power supply mode. In this scheme, the multi-current converter meets the AC grid power supply mode, the internal combustion generator power supply mode and the DC power supply mode to ensure that the EMU meets different voltage systems during operation. At the same time, the secondary filter circuit is eliminated to simplify the multi-current system transformation. The structure of the flow converter reduces the volume and weight of the multi-flow converter.
本说明书中的各个实施例均采用递进的方式描述，各个实施例之间相同相似的部分互相参见即可，每个实施例重点说明的都是与其他实施例的不同之处。本领域普通技术人员在不付出创造性劳动的情况下，即可以理解并实施。The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. Those of ordinary skill in the art can understand and implement it without creative work.
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下，在其它实施例中实现。因此，本发明将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown in this document, but should conform to the widest scope consistent with the principles and novel features disclosed in this document.

Claims (10)

  1. 一种多流制变流器，其特征在于，所述多流制变流器包括：A multi-flow converter, characterized in that, the multi-flow converter includes:
    整流器、直流回路、交流电网供电模式下闭合的第一交流开关和第二交流开关、内燃发电机供电模式下闭合的第一开关回路和直流供电模式下闭合的第二开关回路；A rectifier, a DC circuit, a first AC switch and a second AC switch closed in the AC grid power supply mode, a first switching circuit closed in the internal combustion generator power supply mode, and a second switching circuit closed in the DC power supply mode;
    所述第一交流开关的第一端与第一个次边绕组的正输出端连接，所述第一交流开关的第二端与所述整流器的第一正输入端连接，所述整流器的第一负输入端与所述第一个次边绕组的负输出端连接；The first terminal of the first AC switch is connected to the positive output terminal of the first secondary winding, the second terminal of the first AC switch is connected to the first positive input terminal of the rectifier, and the first terminal of the rectifier A negative input terminal is connected to the negative output terminal of the first secondary winding;
    所述第二交流开关的第一端与第二个次边绕组的正输出端连接，所述第二交流开关的第二端与所述整流器的第二正输入端连接，所述整流器的第二负输入端与所述第二个次边绕组的负输出端连接；The first terminal of the second AC switch is connected to the positive output terminal of the second secondary winding, the second terminal of the second AC switch is connected to the second positive input terminal of the rectifier, and the first terminal of the rectifier Two negative input terminals are connected with the negative output terminal of the second secondary winding;
    所述第一开关回路的输入端与内燃发电机连接，所述第一开关回路的第一输出端与所述整流器的第一正输入端连接，所述第一开关回路的第二输出端与所述整流器的第一负输入端连接，所述第一开关回路的第三输出端与所述整流器的第二负输入端连接；The input end of the first switch circuit is connected to the internal combustion generator, the first output end of the first switch circuit is connected to the first positive input end of the rectifier, and the second output end of the first switch circuit is connected to The first negative input terminal of the rectifier is connected, and the third output terminal of the first switch loop is connected with the second negative input terminal of the rectifier;
    所述整流器的输出端与所述直流回路的输入端并联，所述直流回路的输出端与被供电设备并联；The output terminal of the rectifier is connected in parallel with the input terminal of the DC loop, and the output terminal of the DC loop is connected in parallel with the powered equipment;
    所述第二开关回路的输入端与直流电源连接，所述第二开关回路的输出端与所述被供电设备并联。The input end of the second switch loop is connected with a DC power supply, and the output end of the second switch loop is connected in parallel with the powered device.
  2. 根据权利要求1所述的多流制变流器，其特征在于，所述被供电设备至少包括：牵引逆变电路、辅助逆变电路和直流输出电路中的一种或多种；The multi-current converter according to claim 1, wherein the powered equipment at least includes one or more of a traction inverter circuit, an auxiliary inverter circuit, and a DC output circuit;
    所述辅助逆变电路的输入端分别与所述直流回路的输出端和所述第二开关回路的输出端并联；The input terminal of the auxiliary inverter circuit is connected in parallel with the output terminal of the direct current loop and the output terminal of the second switch loop respectively;
    所述辅助逆变电路的输出端与交流负载连接，所述辅助逆变电路的输出端与所述直流输出电路的输入端连接，所述直流输出电路的输出端与直流负载连接；The output terminal of the auxiliary inverter circuit is connected to an AC load, the output terminal of the auxiliary inverter circuit is connected to the input terminal of the DC output circuit, and the output terminal of the DC output circuit is connected to a DC load;
    所述牵引逆变电路的输入端分别与所述直流回路的输出端和所述第二开关回路的输出端并联，所述牵引逆变电路的输出端分别与n个牵引电机连接，n为正整数。The input terminals of the traction inverter circuit are respectively connected in parallel with the output terminals of the DC loop and the output terminal of the second switching circuit, and the output terminals of the traction inverter circuit are respectively connected with n traction motors, and n is positive. Integer.
  3. 根据权利要求1或2所述的多流制变流器，其特征在于，所述直流回路包括：第一电阻、第二电阻、电压传感器和支撑电容；The multi-flow converter according to claim 1 or 2, wherein the DC loop comprises: a first resistor, a second resistor, a voltage sensor, and a supporting capacitor;
    所述第一电阻的第一端与所述整流器的正输出端连接，所述第一电阻的第二端与所述第二电阻的第一端连接，所述第二电阻的第二端与所述整流器的负输出端连接；The first end of the first resistor is connected to the positive output end of the rectifier, the second end of the first resistor is connected to the first end of the second resistor, and the second end of the second resistor is connected to the The negative output terminal of the rectifier is connected;
    所述电压传感器的第一端与所述整流器的正输出端连接，所述电压传感器的第二端接地，所述电压传感器的第二端与所述第一电阻的第二端连接；The first end of the voltage sensor is connected to the positive output end of the rectifier, the second end of the voltage sensor is grounded, and the second end of the voltage sensor is connected to the second end of the first resistor;
    所述支撑电容与所述整流器并联，所述支撑电容分别与所述第二开关回路的输出端和所述被供电设备并联。The supporting capacitor is connected in parallel with the rectifier, and the supporting capacitor is connected in parallel with the output end of the second switching circuit and the powered device respectively.
  4. 根据权利要求2所述的多流制变流器，其特征在于，所述牵引逆变电路包括：牵引逆变模块、斩波电流传感器和斩波电阻；The multi-current converter according to claim 2, wherein the traction inverter circuit comprises: a traction inverter module, a chopper current sensor, and a chopper resistor;
    所述牵引逆变模块的输入端与所述直流回路的输出端并联，所述斩波电流传感器 的第一端接入所述牵引逆变模块，所述斩波电流传感器的第二端通过所述斩波电阻与所述牵引逆变模块的负输入端连接。The input terminal of the traction inverter module is connected in parallel with the output terminal of the DC loop, the first terminal of the chopper current sensor is connected to the traction inverter module, and the second terminal of the chopper current sensor passes through the The chopper resistor is connected to the negative input terminal of the traction inverter module.
  5. 根据权利要求2所述的多流制变流器，其特征在于，所述辅助逆变电路包括：DC-AC模块和AC-AC模块；The multi-current converter according to claim 2, wherein the auxiliary inverter circuit comprises: a DC-AC module and an AC-AC module;
    所述DC-AC模块的输入端与所述直流回路的输出端并联，所述DC-AC模块的输出端与所述AC-AC模块的输入端连接，所述AC-AC模块的输出端与所述直流输出电路的输入端连接，所述AC-AC模块的输出端与所述交流负载连接。The input terminal of the DC-AC module is connected in parallel with the output terminal of the DC loop, the output terminal of the DC-AC module is connected with the input terminal of the AC-AC module, and the output terminal of the AC-AC module is connected with The input end of the DC output circuit is connected, and the output end of the AC-AC module is connected to the AC load.
  6. 根据权利要求2所述的多流制变流器，其特征在于，所述多流制变流器还包括：第三电阻和在交流电网供电模式下闭合的第三交流开关；The multi-current converter according to claim 2, wherein the multi-current converter further comprises: a third resistor and a third AC switch closed in the AC power supply mode;
    所述第三交流开关的第一端与所述第一个次边绕组的正输出端连接，所述第三交流开关的第二端通过所述第三电阻与所述整流器的第一正输入端连接。The first end of the third AC switch is connected to the positive output end of the first secondary winding, and the second end of the third AC switch is connected to the first positive input of the rectifier through the third resistor端连接。 End connection.
  7. 根据权利要求2所述的多流制变流器，其特征在于，所述第一开关回路包括：第一三相接触器；The multi-flow converter according to claim 2, wherein the first switching circuit comprises: a first three-phase contactor;
    所述第一三相接触器的W相输入端、V相输入端和U相输入端分别与所述内燃发电机的W相输出端、V相输出端和U相输出端连接；The W-phase input terminal, the V-phase input terminal and the U-phase input terminal of the first three-phase contactor are respectively connected to the W-phase output terminal, the V-phase output terminal and the U-phase output terminal of the internal combustion generator;
    所述第一三相接触器的W相输出端与所述整流器的第一正输入端连接，所述第一三相接触器的V相输出端与所述整流器的第一负输入端连接，所述第一三相接触器的U相输出端与所述整流器的第二负输入端连接。The W-phase output terminal of the first three-phase contactor is connected with the first positive input terminal of the rectifier, and the V-phase output terminal of the first three-phase contactor is connected with the first negative input terminal of the rectifier, The U-phase output terminal of the first three-phase contactor is connected to the second negative input terminal of the rectifier.
  8. 根据权利要求7所述的多流制变流器，其特征在于，所述第一开关回路还包括：第二三相接触器和第四电阻；The multi-flow converter according to claim 7, wherein the first switching circuit further comprises: a second three-phase contactor and a fourth resistor;
    所述第二三相接触器的W相输入端、V相输入端和U相输入端分别与所述内燃发电机的W相输出端、V相输出端和U相输出端连接；The W-phase input end, the V-phase input end and the U-phase input end of the second three-phase contactor are respectively connected to the W-phase output end, the V-phase output end and the U-phase output end of the internal combustion generator;
    所述第二三相接触器的W相输出端、V相输出端和U相输出端分别通过所述第四电阻与所述第二三相接触器的W相输出端、V相输出端和U相输出端连接。The W-phase output terminal, the V-phase output terminal, and the U-phase output terminal of the second three-phase contactor are respectively connected to the W-phase output terminal, the V-phase output terminal and the U-phase output terminal of the second three-phase contactor through the fourth resistor. U-phase output terminal connection.
  9. 根据权利要求2所述的多流制变流器，其特征在于，所述第二开关回路包括：隔离开关和第一直流开关；The multi-flow converter according to claim 2, wherein the second switching circuit comprises: an isolating switch and a first DC switch;
    所述第一直流开关的第一端与所述直流电源的正输出端连接，所述第一直流开关的第二端与所述隔离开关的第一输入端连接；The first end of the first DC switch is connected to the positive output end of the DC power supply, and the second end of the first DC switch is connected to the first input end of the isolating switch;
    所述隔离开关的第二输入端通过电容接地，所述隔离开关的第二输入端与所述直流电源的负输出端连接；The second input terminal of the isolation switch is grounded through a capacitor, and the second input terminal of the isolation switch is connected to the negative output terminal of the DC power supply;
    所述隔离开关的第一输出端与所述牵引逆变电路的正输入端连接，所述隔离开关的第二输出端与所述牵引逆变电路的负输入端连接。The first output terminal of the isolation switch is connected with the positive input terminal of the traction inverter circuit, and the second output terminal of the isolation switch is connected with the negative input terminal of the traction inverter circuit.
  10. 根据权利要求9所述的多流制变流器，其特征在于，所述第二开关回路还包括：第五电阻和直流供电模式下闭合的第二直流开关；The multi-current converter according to claim 9, wherein the second switching circuit further comprises: a fifth resistor and a second DC switch closed in a DC power supply mode;
    所述第二直流开关的第一端与所述直流电源的正输出端连接，所述第二直流开关的第二端通过所述第五电阻与所述第一直流开关的第二端连接。The first terminal of the second DC switch is connected to the positive output terminal of the DC power supply, and the second terminal of the second DC switch is connected to the second terminal of the first DC switch through the fifth resistor .
PCT/CN2019/126249 2019-12-11 2019-12-18 Multi-current standard converter WO2021114332A1 (en)

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