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WO2024091083A1 - Convertisseur multiniveau modulaire et système d'alimentation l'utilisant - Google Patents

Convertisseur multiniveau modulaire et système d'alimentation l'utilisant Download PDF

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Publication number
WO2024091083A1
WO2024091083A1 PCT/KR2023/016938 KR2023016938W WO2024091083A1 WO 2024091083 A1 WO2024091083 A1 WO 2024091083A1 KR 2023016938 W KR2023016938 W KR 2023016938W WO 2024091083 A1 WO2024091083 A1 WO 2024091083A1
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WO
WIPO (PCT)
Prior art keywords
power
voltage
converter
direct current
output
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2023/016938
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English (en)
Korean (ko)
Inventor
강남숙
조영호
김상현
안상준
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hd Korea Shipbuilding & Offshore Engineering Co Ltd
HD Hyundai Heavy Industries Co Ltd
Original Assignee
Hd Korea Shipbuilding & Offshore Engineering Co Ltd
HD Hyundai Heavy Industries Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hd Korea Shipbuilding & Offshore Engineering Co Ltd, HD Hyundai Heavy Industries Co Ltd filed Critical Hd Korea Shipbuilding & Offshore Engineering Co Ltd
Priority to CN202380075888.2A priority Critical patent/CN120153566A/zh
Priority to EP23883187.9A priority patent/EP4611247A1/fr
Priority claimed from KR1020230145982A external-priority patent/KR102886015B1/ko
Publication of WO2024091083A1 publication Critical patent/WO2024091083A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H02M1/00—Details of apparatus for conversion
    • 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
    • H02M7/483—Converters with outputs that each can have more than two voltages levels
    • 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
    • H02M7/493—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 the static converters being arranged for operation in parallel
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters

Definitions

  • Embodiments disclosed in this document relate to modular multilevel converters and power system systems using the same.
  • a modular multilevel converter realizes high voltage output through cascade connection of several converter valve submodule units.
  • the modular multilevel converter does not require direct cascade connection of switching elements, has low requirements for element trigger consistency, and also has excellent scalability, low switching frequency, and low operation loss. It has the advantage of high quality output voltage waveform.
  • Embodiments disclosed in this document seek to provide a power system system using a modular multilevel converter.
  • Embodiments disclosed in this document seek to provide a power system system for reducing the costs required to operate large electric propulsion ships.
  • Embodiments disclosed in this document are intended to provide a power system system that is easy to connect with multiple energy sources when operating a large electric propulsion ship.
  • Embodiments disclosed in this document seek to provide a power system system for efficiently utilizing the limited space of a ship.
  • the modular multilevel converter has legs according to preset phases, the legs have an upper arm and a lower arm, and the upper arm and a first converter unit, wherein the lower arm has a plurality of sub-modules connected in series, and converts direct current power input to the input terminal into alternating current power having the phase and outputs it through a first output terminal. And it may include a second converter unit that converts the direct current power input to the input terminal into alternating current power having a voltage level lower than the voltage level of the alternating current power output from the first converter unit and outputs it through a second output terminal.
  • the second converter unit is composed of a plurality of additional submodules of a full bridge type connected in series with the upper arm of the leg of the first converter unit, and a plurality of neighboring additional submodules are connected in parallel with each other.
  • the plurality of additional submodules include: a first low-voltage converter unit that converts the direct current power of the input terminal into alternating current power having a voltage level lower than the voltage level of the alternating current power output from the first converter unit; and a plurality of additional submodules of a full bridge type connected in series with the lower arm of the leg of the first converter unit, wherein the plurality of neighboring additional submodules are connected in parallel to each other, and the plurality of additional submodules are It may include at least one of a second low-voltage converter unit that converts the DC power of the input terminal into AC power having a voltage level lower than the voltage level of the AC power output from the first converter unit.
  • it may further include a control unit that controls power conversion of the first low-voltage converter unit and the second low-voltage converter unit.
  • the first converter unit when AC power is input to the first output terminal, the first converter unit converts the AC power input to the first output terminal into preset DC power and outputs it to the input terminal. It may be a bidirectional converter. .
  • the first converter unit and the second converter unit may convert DC power of the input terminal into three-phase AC power having different voltage levels and output the converted DC power.
  • a power system system includes a first modular multilevel converter having multiple output stages; a propulsion motor supplied with AC power from a first output stage among the multiple output stages; a first low-voltage alternating current (AC) distribution system that receives alternating current power from a second output terminal among the multiple output terminals; And it may include medium-voltage direct current (DC) distribution for supplying direct current power to the first modular multi-level converter.
  • a propulsion motor supplied with AC power from a first output stage among the multiple output stages
  • a first low-voltage alternating current (AC) distribution system that receives alternating current power from a second output terminal among the multiple output terminals
  • DC direct current
  • the voltage level of AC power output through the second output terminal may be lower than the voltage level of AC power output through the first output terminal.
  • the direct current power supplied to the first modular multi-level converter through the high-voltage direct current distribution may be generated directly or indirectly by at least one of an energy storage system, a fuel cell system, and a generator.
  • the generator and the high-voltage direct current distribution are electrically connected and may further include a second modular multi-level converter having at least one output stage.
  • the second modular multilevel converter may have a third output stage for outputting direct current power to the high voltage direct current distribution, and a fourth output stage for outputting alternating current power to the service load distribution.
  • the second modular multilevel converter may have a fifth output stage for outputting direct current power to the high voltage direct current distribution, and a sixth output stage for outputting direct current power to the service load distribution.
  • the voltage level of direct current power output through the sixth output terminal may be lower than the voltage level of direct current power output through the fifth output terminal.
  • the second output terminal and the low-voltage AC power distribution may be electrically connected through an isolation transformer.
  • the isolation transformer may be either a two-winding transformer or a three-winding transformer.
  • it is connected to the high-voltage direct current distribution and may further include a bus tie for exchanging direct current power with other power system systems.
  • Embodiments disclosed in this document can provide a power system system using a modular multilevel converter.
  • Embodiments disclosed in this document can provide a power system system for reducing the costs required to operate large electric propulsion ships.
  • Embodiments disclosed in this document can provide a power system system that is easy to connect with a plurality of energy sources when operating a large electric propulsion ship.
  • Embodiments disclosed in this document can provide a power system system for efficiently utilizing the limited space of a ship.
  • FIG. 1 is a diagram schematically showing a modular multilevel converter according to an embodiment disclosed in this document.
  • Figure 2 is a schematic circuit diagram of a sub-module of a modular multilevel converter according to an embodiment disclosed in this document.
  • Figure 3 is a diagram schematically showing a modular multilevel converter according to an embodiment disclosed in this document.
  • 4A to 4C are schematic diagrams of a modular multi-level converter and a power system using the same according to an embodiment disclosed in this document.
  • 5A to 5B are schematic diagrams of a power system in which a modular multi-level converter with a single output stage is disposed between a high-voltage direct current distribution and a propulsion motor according to an embodiment disclosed in this document.
  • FIGS. 6A to 6C are schematic diagrams of a power system in which a modular multi-level converter is additionally disposed between high-voltage direct current distribution and a generator according to an embodiment disclosed in this document.
  • FIGS. 7A to 7B are schematic diagrams of a power system in which a modular multi-level converter with multiple output stages is disposed between a high-voltage direct current distribution and a propulsion motor according to an embodiment disclosed in this document.
  • FIGS. 8A to 8C are schematic diagrams of a power system in which a modular multi-level converter is additionally disposed between high-voltage direct current distribution and a generator according to an embodiment disclosed in this document.
  • FIGS. 9A to 9B are schematic diagrams of a power system in which a modular multi-level converter with multiple output stages is disposed between a high-voltage direct current distribution and a propulsion motor according to an embodiment disclosed in this document.
  • FIGS. 10A to 10C are schematic diagrams of a power system in which a modular multi-level converter is additionally disposed between high-voltage direct current distribution and a generator according to an embodiment disclosed in this document.
  • FIGS. 11A to 11E are schematic diagrams of a power system in which a modular multi-level converter is disposed between a high-voltage AC distribution and a propulsion motor according to an embodiment disclosed in this document.
  • Figure 12 is a diagram schematically showing a modular multi-level converter and rectifier stage according to an embodiment disclosed in this document.
  • FIGS. 13A to 13C are schematic diagrams of a power system in which a modular multi-level converter is disposed between high-voltage direct current distribution and a generator according to an embodiment disclosed in this document.
  • FIGS. 14A to 14J are schematic diagrams of a power system in which a modular multi-level converter is additionally disposed between a high-voltage direct current distribution and a propulsion motor according to an embodiment disclosed in this document.
  • FIGS 15a to 15d schematically show a power system system in which grids of essential loads and service loads are separated according to an embodiment disclosed in this document.
  • 1 is a diagram schematically showing a modular multilevel converter with a single output stage.
  • a modular multilevel converter having a single output stage includes a plurality of submodules (SM; CELL) and converts input direct current power (e.g., medium-voltage direct current (Medium-Voltage Direct Current)).
  • MVDC medium-voltage direct current
  • LVAC low-voltage alternating current
  • Figure 2 is a schematic circuit diagram of a sub-module of a modular multilevel converter.
  • the sub-module (SM) may be configured as a half-bridge or full-bridge method, and may also be configured as other circuits.
  • the sub-module (SM) can perform switching operations under the control of the controller.
  • the sub-module shown in FIG. 2 may be provided in the modular multi-level converter having a single output terminal of FIG. 1, but is not limited thereto, and may be used as a multi-level converter to be described later with reference to FIGS. 3, 4A and 4B, etc. It can also be provided in a modular multilevel converter having an output stage.
  • FIG. 3 is a diagram schematically showing a modular multi-level converter 100 having multiple output stages according to an embodiment disclosed in this document. That is, it can be seen that the modular multi-level converter shown in FIG. 1 has a single output stage, while the modular multi-level converter shown in FIG. 3 has multiple output stages.
  • the modular multi-level converter 100 may include a first converter unit 110 and a second converter unit 121 and 122.
  • the first converter unit 110 may convert direct current power input to the input terminal into alternating current power having a phase and output it to the output terminal.
  • the first converter unit 110 may have a plurality of legs according to preset phases.
  • each of the plurality of legs may have an upper arm and a lower arm, and the upper arm and the lower arm may each have a plurality of submodules (SM).
  • SM submodules
  • a motor is shown as an example of a load.
  • the type of load supplied with power from the modular multi-level converter is not limited to the motor, and other types of loads other than the motor are possible. Power can also be supplied from a modular multilevel converter.
  • the second converter units 121 and 122 convert the DC power input to the input terminal into the AC power output from the first converter unit 110, separately from the AC power from each leg of the first converter unit 110. It can be converted to power (AC power or DC power) with a voltage level lower than the voltage level of .
  • the second converter unit may include at least one of the first low-pressure converter unit 121 and the second low-pressure converter unit 122.
  • first low-pressure converter unit 121 and the second low-pressure converter unit 122 are shown for convenience to facilitate understanding, but the second low-pressure converter unit 121 is provided only at either the top or bottom of the first converter unit 110. It is not excluded that the converter unit is located. That is, the first low-pressure converter unit 121 may be located only at the top of the first converter unit 110, or the second low-pressure converter unit 122 may be located only at the bottom of the first converter unit 110.
  • the first low-voltage converter unit 121 may convert direct current power from the input terminal into power having a voltage level lower than the voltage level of the alternating current power output from the first converter unit 110 and output the converted power.
  • the second low-voltage converter unit 122 may convert DC power from the input terminal into AC power having a voltage level lower than the voltage level of the AC power output from the first converter unit 110 and output the converted DC power.
  • the modular multi-level converter 100 may have multiple output stages (a first output stage corresponding to the first converter part and a second output stage corresponding to the second converter part), Through this, low-voltage power and high-voltage power can be supplied simultaneously.
  • the type of power output from the output terminal (i.e., auxiliary output terminal) of the second converter unit may be different.
  • a modular multi-level converter having an auxiliary output stage that outputs AC power will be described later with reference to FIG. 4A.
  • FIG. 4A is a diagram schematically showing a modular multilevel converter 100 having multiple output stages according to an embodiment disclosed in this document.
  • the modular multi-level converter 100 may include a first converter unit 110 and a second converter unit 120. At this time, the modular multi-level converter 100 may further include a control unit 130.
  • the first converter unit 110 has legs (L1, L2, L3) according to preset phases, and each of the legs (L1, L2, L3) has an upper arm (UA1, UA2, UA3) and lower arms (LA1, LA2, LA3), and the upper arms (UA1, UA2, UA3) and lower arms (LA1, LA2, LA3) each have a plurality of submodules connected in series.
  • SM can be provided to convert the input direct current power into alternating current power.
  • the direct current power input to the first converter unit 110 may be medium-voltage direct current (MVDC), and the first converter unit 110 converts the direct current power into alternating current power to load the load. can be driven. At this time, the converted AC power may be three-phase AC power.
  • MVDC medium-voltage direct current
  • a motor is shown as an example of a load.
  • the type of load supplied with power from the modular multi-level converter is not limited to the motor, and other types of loads other than the motor are possible. Power can also be supplied from a modular multilevel converter.
  • the first to third legs (L1, L2, L3) may have upper arms (UA1, UA2, UA3) and lower arms (LA1, LA2, LA3), respectively.
  • the upper arms (UA1, UA2, UA3) and lower arms (LA1, LA2, LA3) of the first to third legs (L1, L2, L3) each have N sub-arms connected in series. It may be provided with a module (SM) (where N is a natural number).
  • the voltage of the upper or lower arm of one leg may be the voltage (Vmvdc) of the medium voltage direct current power (MVDC) input to the input terminal, and the voltage between each of the upper and lower DC power terminals and ground (gnd) is 0.5Vmvdc. can be displayed.
  • the first converter unit 110 may convert direct current power input to the input terminal into alternating current power having a phase and output it to the output terminal.
  • the second converter unit 120 converts the DC power input to the input terminal separately from the AC power from each leg (L1, L2, L3) of the first converter unit 110 to the first converter unit 110. It can be converted into AC power with a voltage level lower than the voltage level of the AC power output from .
  • the second converter unit 120 may include a first low-pressure converter unit 121 and a second low-pressure converter unit 122.
  • the first low-voltage converter unit 121 may be composed of a plurality of additional submodules configured in a full bridge manner, and each additional submodule is connected to each leg (L1, L2, L3) of the first converter unit 110. ) can be connected in series with each upper arm (UA1, UA2, UA3). Additionally, each additional submodule connected in series with each upper arm (UA1, UA2, UA3) can be connected in parallel with each other. At this time, the first low-voltage converter unit 121 may convert the direct current power from the input terminal into alternating current power having a voltage level lower than the voltage level of the alternating current power output from the first converter unit 110 and output it.
  • the second low-voltage converter unit 122 may be composed of a plurality of additional submodules configured in a full bridge manner, and each additional submodule is connected to each leg (L1, L2, L3) of the first converter unit 110. ) can be connected in series with each lower arm (LA1, LA2, LA3). Additionally, each additional submodule connected in series with each lower arm (LA1, LA2, LA3) can be connected in parallel with each other.
  • the second low-voltage converter unit 122 may convert DC power from the input terminal into AC power having a voltage level lower than the voltage level of the AC power output from the first converter unit 110 and output the converted DC power.
  • the modular multi-level converter 100 can simultaneously supply low-voltage AC power and high-voltage AC power. That is, the modular multi-level converter 100 according to an embodiment disclosed in this document may have multiple output stages (a first output stage and a second output stage).
  • the modular multi-level converter 100 may further include a control unit 130, where the control unit 130 controls the power of the first converter unit and the second converter unit 110 and 120. You can control the conversion operation.
  • control unit 130 may control the switching operations of the first low-pressure converter unit and the second low-pressure converter units 121 and 122 of the second converter unit 120, and the first low-pressure converter unit and the second low-pressure converter unit 120
  • the switching circuits of each of the converter units 121 and 122 perform a switching operation under the control of the control unit 130 to convert the power of the upper arm or lower arm into an AC voltage level lower than the AC power of the first converter unit 110. It can be converted into power and output.
  • control unit 130 may be composed of at least one processing unit and memory.
  • the processing unit is, for example, a central processing unit (CPU), graphics processing unit (GPU), microprocessor, application specific integrated circuit (ASIC), field programmable gate array (FPGA), etc. may include and may have multiple cores.
  • the memory may be volatile memory (eg, RAM, etc.), non-volatile memory (eg, ROM, flash memory, etc.), or a combination thereof.
  • Figure 4b is a schematic configuration diagram of a modular multilevel converter according to another embodiment disclosed in this document.
  • a modular multi-level converter 200 may include a first converter unit 210, a second converter unit 220, and a control unit 230.
  • the first converter unit 210 shown in FIG. 4B may have the same configuration as the first converter unit 110 shown in FIG. 4A.
  • the first converter unit 210 may be a bidirectional converter.
  • the first converter unit 210 when high-voltage AC power from the generator is input to the output terminal in FIG. 4A, the first converter unit 210 can output high-voltage direct current power to the input terminal in FIG. 4A.
  • Low-voltage direct current power may refer to direct current power less than 1500V
  • high-voltage direct current power may refer to direct current power greater than 1500V and less than 100kV.
  • the modular multilevel converter 100 in FIG. 4A can receive DC power, output AC power through a first output stage, and output AC power through a second output stage, and the module in FIG. 4B
  • the multilevel converter 200 receives alternating current power and outputs direct current power through a first output terminal (position corresponding to the input terminal in FIG. 4A) and a second output terminal (position corresponding to the second output terminal in FIG. 4A).
  • AC power can be output through .
  • the configuration and operation of the first converter unit 210, the second converter unit 220, and the control unit 230 are omitted since they overlap with the description in FIG. 4A.
  • Figure 4c is a schematic configuration diagram of a power system using a modular multi-level converter with multiple output stages according to an embodiment disclosed in this document.
  • a power system system using a modular multi-level converter with multiple output stages requires low-voltage AC power through an auxiliary output stage without a conventional transformer, as shown in FIG. 4C. It can supply low-voltage AC power corresponding to low-voltage loads.
  • FIGS. 5A and 5B are schematic diagrams of a power system using a modular multi-level converter (MMC) according to an embodiment disclosed in this document.
  • MMC modular multi-level converter
  • the modular multi-level converter 10 shown in FIGS. 5A to 5B may be a modular multi-level converter with a single output stage, like the modular multi-level converter shown in FIG. 1.
  • a modular multi-level converter 10 having a single output stage can be used between the high-voltage direct current distribution 20 and the propulsion motor 30 shown in FIGS. 5A to 5B, the high-voltage direct current distribution 20 and the remaining devices (e.g., generator, large motor, etc.), a general inverter/converter may be used, or a modular multilevel converter may be used.
  • the power system using the modular multi-level converter 10 with a single output stage is used for medium-voltage direct current (MVDC) distribution.
  • MVDC medium-voltage direct current
  • (20) a modular multi-level converter
  • a propulsion motor (Prop. Motor) (30).
  • the modular multi-level converter 10 may be placed between the high-voltage direct current distribution 20 and the propulsion motor 30.
  • a modular multilevel converter includes a plurality of submodules, and accordingly, even if the modular multilevel converter is connected to high capacity power (distribution), the capacity that each submodule must handle is reduced.
  • modular multilevel converters can be used by flexibly adding or removing submodules depending on the situation, creating an advantageous effect in terms of scalability.
  • power can be transferred from the high-voltage direct current distribution 20 to the low-voltage alternating current distribution (LVAC) through the DC/AC power conversion device 40.
  • LVAC low-voltage alternating current distribution
  • power is primarily transferred from the high-voltage direct current distribution 20 to the low-voltage direct current distribution (LVDC) through the DC/DC power conversion device 40, and the DC/AC power conversion device Power can be transmitted secondarily from low-voltage direct current distribution (LVDC) to low-voltage alternating current distribution (LVAC).
  • LVDC low-voltage direct current distribution
  • LVAC low-voltage alternating current distribution
  • a power source that supplies power may be additionally included, for example, as shown in FIGS. 5A and 5B, an energy storage system (ESS), a fuel cell system (SOFC), a diesel generator (DG), and an axle. At least some of the generators (shaft generators) may be additionally included.
  • ESS energy storage system
  • SOFC fuel cell system
  • DG diesel generator
  • axle At least some of the generators (shaft generators) may be additionally included.
  • the capacity of a large motor may be smaller than the capacity of a propulsion motor (e.g., 10 MW or more).
  • the large motors may be connected differently depending on the type of wire. If the large motor is connected to MVDC, the separate step of boosting the voltage can be omitted when sending from Aft to Fwd. Accordingly, considering that the size of the large-capacity high-pressure motor is smaller than that of the large-capacity low-pressure motor, the size of the motor can be reduced because the high-voltage motor can be used.
  • a power conversion device may be used to transfer power supplied from a power source to the high-voltage direct current distribution 20.
  • the power conversion device may be a general inverter or converter as shown in FIGS. 5A and 5B, but is not limited thereto, and a modular multi-level converter having a single output stage or multiple output stages may be used.
  • FIGS. 6A to 6C show a power system in which the modular multi-level converter 10 having a single output stage described with reference to FIGS. 5A and 5B is disposed between the high-voltage direct current distribution 20 and the propulsion motor 30, It shows an embodiment in which a modular multi-level converter 50 having a single output stage or multiple output stages is additionally disposed between the high-voltage direct current distribution 20 and the generator (DG) 60.
  • DG generator
  • a modular multi-level converter 10 having a single output stage can be used between the high-voltage direct current distribution 20 and the propulsion motor 30 shown in FIGS. 6A to 6C, except for the generator 60
  • a typical inverter/converter may be used between the remaining devices (e.g., energy storage system, large motor, etc.) and the high-voltage direct current distribution 20, or a modular multilevel converter may be used.
  • a modular multi-level converter 50 having a single output stage is additionally disposed between the high-voltage direct current distribution 20 and the generator 60.
  • the modular multilevel converter includes a plurality of submodules, and thus, even if the modular multilevel converter is connected to a high capacity power (generator), the capacity that each submodule must handle is reduced.
  • a modular multi-level converter 50 having multiple output stages is additionally disposed between the high-voltage direct current distribution 20 and the generator 60.
  • the main output stage (high-voltage DC power output) of the modular multi-level converter 50 having multiple output stages transmits power to the high-voltage DC power distribution 20
  • the auxiliary output stage (low-voltage AC power output) transmits power to the service load (LVAC).
  • LVAC service load
  • the modular multi-level converter 50 having multiple output stages shown in FIG. 6B may be identical/similar to the structure and operation of the modular multi-level converter 200 shown in FIG. 4B.
  • the modular multi-level converter 50 having multiple output terminals and the service load may be electrically connected through an isolation transformer.
  • the isolation transformer may be either a two-winding transformer or a three-winding transformer.
  • a two-winding transformer may require two units, and a three-winding transformer may require one unit.
  • a modular multi-level converter 50 having multiple output stages is additionally disposed between the high-voltage direct current distribution 20 and the generator 60.
  • the main output stage (high-voltage DC power output) of the modular multi-level converter 50 having multiple output stages transmits power to the high-voltage DC power distribution 20, and the auxiliary output stage (low-voltage DC power output) transmits power to the service load (LVDC).
  • LVDC service load
  • the power system may additionally include a bus tie for exchanging power with other power system systems.
  • a bus tie may be located between the first power system system and the second power system system, and the bus tie connects and disconnects the first power system system and the second power system system. It may include a bus tie breaker to control. At this time, the breaker may be a solid state circuit breaker (SSCB) as shown in FIG. 5A, etc., but is not limited thereto and may be a mechanical breaker.
  • SSCB solid state circuit breaker
  • FIGS. 7A and 7B are schematic diagrams of a power system using a modular multi-level converter 10 having multiple output stages according to an embodiment disclosed in this document.
  • the modular multi-level converter 10 shown in FIGS. 7A to 7B may be a modular multi-level converter having multiple output stages, like the modular multi-level converter 100 shown in FIG. 4A.
  • the first output stage may output high-voltage AC power for driving the propulsion motor 30, and the second output stage may output low-pressure AC power.
  • a modular multi-level converter 10 having multiple output stages may be used between the high-voltage direct current distribution 20 and the propulsion motor 30 shown in FIGS. 7A to 7B, while the remaining devices (e.g., energy A general inverter/converter may be used between the storage system, large motor, etc.) and the high-voltage direct current distribution 20, or a modular multi-level converter may be used.
  • the power system system using a modular multi-level converter 10 with multiple output stages includes high-voltage direct current (Medium-Voltage Direct Current; MVDC) distribution 20 and low-voltage alternating current distribution (Low).
  • MVDC Medium-Voltage Direct Current
  • LVAC Low-Voltage Alternating Current
  • LVAC 70
  • Propulsion motor Prop. Motor
  • the modular multi-level converter 10 may be placed between the high-voltage direct current distribution 20 and the propulsion motor 30.
  • the modular multilevel converter 10 of the power grid system shown in FIGS. 7A and 7B has multiple output stages. Therefore, there is no additional need for a separate inverter to supply power to the service load or the corresponding low-voltage AC distribution 70. Accordingly, the power system system can be implemented smaller and simpler, the number of required parts is reduced, thereby improving productivity, and making management and maintenance easier.
  • an energy storage system ESS
  • SOFC fuel cell system
  • DG diesel generator
  • a shaft generator may be used as a power source that supplies power to the high-voltage direct current distribution 20.
  • ESS energy storage system
  • SOFC fuel cell system
  • DG diesel generator
  • shaft generator a shaft generator
  • an energy storage system (ESS) and a fuel cell system (SOFC) can directly generate direct current power to supply to the high voltage direct current distribution 20.
  • ESS energy storage system
  • SOFC fuel cell system
  • a diesel generator (DG) and a shaft generator may indirectly generate direct current power to supply to the high voltage direct current distribution 20. That is, a separate process may be required to convert alternating current power generated by the diesel generator (DG) and shaft generator into direct current power.
  • the modular multi-level converter 10 having multiple output terminals and the service load 70 may be electrically connected through an isolation transformer.
  • the isolation transformer may be either a two-winding transformer or a three-winding transformer.
  • FIGS. 7A and 7B show a power system in which the modular multi-level converter 10 having multiple output stages described with reference to FIGS. 7A and 7B is disposed between the high-voltage direct current distribution 20 and the propulsion motor 30, It shows an embodiment in which a modular multi-level converter 50 having a single output stage or multiple output stages is additionally disposed between the high-voltage direct current distribution 20 and the generator 60.
  • a modular multi-level converter 10 having multiple output stages can be used between the high-voltage direct current distribution 20 and the propulsion motor 30 shown in FIGS. 8A to 8C, the remaining devices except the generator ( For example, a general inverter/converter may be used between the energy storage system, large motor, etc.) and the high-voltage direct current distribution 20, or a modular multi-level converter may be used.
  • the generator For example, a general inverter/converter may be used between the energy storage system, large motor, etc.
  • a modular multi-level converter may be used.
  • a modular multi-level converter 50 having a single output stage is additionally disposed between the high-voltage direct current distribution 20 and the generator 60.
  • the modular multilevel converter 50 includes a plurality of submodules, and accordingly, even if the modular multilevel converter 50 is connected to a high capacity power (generator), the capacity that each submodule must handle is It has a reducing effect.
  • a modular multi-level converter 50 having multiple output stages is additionally disposed between the high-voltage direct current distribution 20 and the generator 60.
  • the main output stage (high-voltage DC power output) of the modular multi-level converter 50 having multiple output stages transmits power to the high-voltage DC power distribution 20
  • the auxiliary output stage (low-voltage AC power output) transmits power to the service load (LVAC).
  • LVAC low-voltage AC power output
  • the modular multi-level converter 50 having multiple output stages disposed between the high-voltage direct current distribution 20 and the generator 60 shown in FIG. 8B may have the same/similar structure to the structure shown in FIG. 4B. You can.
  • the modular multi-level converter 50 having multiple output terminals and the service load (LVAC) may be electrically connected through an isolation transformer.
  • the isolation transformer may be either a two-winding transformer or a three-winding transformer.
  • a modular multi-level converter 50 having multiple output stages is additionally disposed between the high-voltage direct current distribution 20 and the generator 60.
  • the main output stage (high-voltage DC power output) of the modular multi-level converter 50 having multiple output stages transmits power to the high-voltage DC power distribution 20
  • the auxiliary output stage (low-voltage DC power output) transmits power to the service load (LVDC).
  • LVDC service load
  • power is primarily transferred to LVDC from a modular multi-level converter 50 having multiple output stages disposed between the high-voltage direct current distribution 20 and the generator 60, and is converted to LVDC through a DC/AC power conversion device. Power can be transmitted secondarily from the LVAC.
  • 9A and 9B are schematic diagrams of a power system using a modular multi-level converter 10 with multiple output stages according to an embodiment disclosed in this document.
  • the modular multi-level converter having multiple output stages shown in FIGS. 7A and 7B described above outputs high-voltage AC power for driving the propulsion motor 30 through the first output stage and low-pressure AC power through the second output stage.
  • the modular multilevel converter 10 having multiple output stages shown in FIGS. 9A to 9B outputs high-voltage AC power for driving the propulsion motor 30 through the first output stage.
  • output, and low-voltage direct current (LVDC) power can be output through the second output terminal.
  • LVDC can be provided to onboard loads (such as LED lamps) without adding a separate power conversion device, making it possible to implement a smaller and simpler power system, and reducing the number of required parts, increasing productivity. Improved, management and maintenance become easier.
  • Low-pressure AC power may refer to AC power of less than 1000V
  • high-voltage AC power may refer to AC power of more than 1000V and less than 35kV.
  • a modular multi-level converter 10 having multiple output stages may be used between the high-voltage direct current distribution 20 and the propulsion motor 30 shown in FIGS. 9A to 9B, while the remaining devices (e.g., energy A general inverter/converter may be used between the storage system, large motor, etc.) and the high-voltage direct current distribution 20, or a modular multi-level converter may be used.
  • the power system system using a modular multi-level converter 10 with multiple output stages includes medium-voltage direct current (MVDC) distribution 20 and low-voltage direct current distribution (20).
  • MVDC medium-voltage direct current
  • LVDC Low-voltage direct current
  • LVDC 80
  • LVDC 80
  • LVDC 80
  • LVDC 80
  • LVDC 80
  • LVDC 80
  • LVDC 80
  • LVDC 80
  • Propulsion motor Prop. Motor
  • the modular multi-level converter 10 may be placed between the high-voltage direct current distribution 20 and the propulsion motor 30.
  • the modular multilevel converter 10 of the power grid system shown in FIGS. 9A and 9B has multiple output stages, so that it can be used to provide service load or corresponding low voltage direct current. There is no additional need for a separate inverter/converter to supply power to the distribution 80.
  • an energy storage system ESS
  • SOFC fuel cell system
  • DG diesel generator
  • a shaft generator may be used as a power source that supplies power to the high-voltage direct current distribution 20.
  • ESS energy storage system
  • SOFC fuel cell system
  • DG diesel generator
  • shaft generator a shaft generator
  • an energy storage system (ESS) and a fuel cell system (SOFC) can directly generate direct current power to supply to the high voltage direct current distribution 20.
  • ESS energy storage system
  • SOFC fuel cell system
  • a diesel generator (DG) and a shaft generator may indirectly generate direct current power to supply to the high voltage direct current distribution 20. That is, a separate process may be required to convert alternating current power generated by the diesel generator (DG) and shaft generator into direct current power.
  • 10A to 10C show a power system in which the modular multi-level converter 10 having multiple output stages described with reference to FIGS. 9A and 9B is disposed between the high-voltage direct current distribution 20 and the propulsion motor 30, It shows an embodiment in which a modular multi-level converter 50 having a single output stage or multiple output stages is additionally disposed between the high-voltage direct current distribution 20 and the diesel generator DG.
  • a modular multi-level converter 10 having multiple output stages can be used between the high-voltage direct current distribution 20 and the propulsion motor 30 shown in FIGS. 10A to 10C, the remaining devices except the generator ( For example, a general inverter/converter may be used between the energy storage system, large motor, etc.) and the high-voltage direct current distribution 20, or a modular multi-level converter may be used.
  • the generator For example, a general inverter/converter may be used between the energy storage system, large motor, etc.
  • a modular multi-level converter may be used.
  • a modular multi-level converter 50 having a single output stage is additionally disposed between the high-voltage direct current distribution 20 and the generator.
  • the modular multilevel converter 50 includes a plurality of submodules, and accordingly, even if the modular multilevel converter 50 is connected to a high capacity power (generator), the capacity that each submodule must handle is It has a reducing effect.
  • a modular multi-level converter 50 having multiple output stages is additionally disposed between the high-voltage direct current distribution 20 and the generator.
  • the main output stage (high-voltage DC power output) of the modular multi-level converter 50 having multiple output stages transmits power to the high-voltage DC power distribution 20
  • the auxiliary output stage (low-voltage AC power output) transmits power to the service load (LVAC).
  • LVAC service load
  • the modular multi-level converter 50 having multiple output stages disposed between the high-voltage direct current distribution 20 and the generator shown in FIG. 10B may have the same/similar structure to the structure shown in FIG. 4B.
  • the modular multi-level converter 50 having multiple output terminals and the service load (LVAC) may be electrically connected through an isolation transformer.
  • the isolation transformer may be either a two-winding transformer or a three-winding transformer.
  • a modular multi-level converter 50 having multiple output stages is additionally disposed between the high-voltage direct current distribution 20 and the generator.
  • the main output stage (high-voltage DC power output) of the modular multi-level converter 50 having multiple output stages transmits power to the high-voltage DC power distribution 20
  • the auxiliary output stage (low-voltage DC power output) transmits power to the service load (LVDC).
  • LVDC service load
  • power is primarily transferred to LVDC from a modular multi-level converter (50) with multiple output stages disposed between the high-voltage direct current distribution (20) and the generator, and from LVDC to LVAC through a DC/AC power conversion device. Power can be transmitted secondarily.
  • FIG. 11A is a schematic configuration of a power grid system including a modular multilevel converter 10 with a single output stage and a medium-voltage alternating current (MVAC) 90 according to an embodiment disclosed in this document. It is also a degree.
  • MVAC medium-voltage alternating current
  • the modular multi-level converter 10 having a single output terminal shown in FIG. 11A receives high-voltage direct current power (MVDC) as an input and drives a load (e.g., propulsion motor 30) as explained in FIG. 1. Since it outputs high-voltage AC power to It is arranged to convert alternating current power into direct current power and transmit direct current power to a modular multi-level converter.
  • MVDC high-voltage direct current power
  • a load e.g., propulsion motor 30
  • a modular multi-level converter 10 and a rectifier stage 10_1 having a single output stage are used between the high-voltage AC distribution 90 and the propulsion motor 30 shown in FIG. 11A, while the high-voltage AC distribution ( 90) and the remaining devices (e.g., energy storage system (ESS), fuel cell system (SOFC), large motor, etc.), a general inverter/converter may be used, or a modular multilevel converter may be used.
  • ESS energy storage system
  • SOFC fuel cell system
  • large motor etc.
  • ESS energy storage system
  • ESS energy storage system
  • SOFC fuel cell system
  • a general inverter/converter may be used
  • a modular multilevel converter may be used.
  • FIGS. 11B and 11C are schematic diagrams of a power system including a modular multi-level converter 10 with multiple output stages and a high-voltage AC distribution 90 according to an embodiment disclosed in this document.
  • the power system shown in FIGS. 11B and 11C is overall similar to the power system shown in FIG. 11A, but is a modular multilevel converter with multiple output stages, rather than a modular multilevel converter with a single output stage. There is a difference in what is included. That is, since an auxiliary output stage for outputting low-pressure AC power is additionally included, low-pressure AC power corresponding to a low-pressure load requiring low-pressure AC power can be supplied without the power conversion device 91 of the power system system shown in FIG. 11A. You can.
  • a modular multi-level converter 10 and a rectifier stage 10_1 having multiple output stages are used between the high-voltage AC distribution 90 and the propulsion motor 30 shown in FIGS. 11b to 11c, while the high-pressure
  • a typical inverter/converter may be used between the AC power distribution 90 and the remaining devices (e.g., energy storage system, large motor, etc.), or a modular multilevel converter may be used.
  • the modular multi-level converter 10 having multiple output stages in the power system shown in FIGS. 11B and 11C receives high voltage direct current power (MVDC) as an input and operates the propulsion motor 30. Since it outputs high-voltage AC power for driving, if the power system includes high-voltage AC distribution (90), a rectifier stage (10_1) can be additionally placed in front of the modular multi-level converter (10) having multiple output stages. there is.
  • MVDC high voltage direct current power
  • the modular multi-level converter 10 having multiple output terminals and the service load 70 may be electrically connected through an isolation transformer.
  • the isolation transformer may be either a two-winding transformer or a three-winding transformer.
  • 11D and 11E are schematic configurations of a power grid system including a modular multi-level converter 10 with multiple output stages and medium-voltage alternating current (MVAC) according to an embodiment disclosed in this document. It is also a degree.
  • MVAC medium-voltage alternating current
  • the power system shown in FIGS. 11D and 11E is similar overall to the power system shown in FIG. 11A, but is a modular multilevel converter with multiple output stages, rather than a modular multilevel converter with a single output stage. There is a difference in what is included. That is, since an auxiliary output stage that outputs low-voltage direct-current power is additionally included, low-pressure direct-current power corresponding to a low-voltage load requiring low-pressure direct-current power can be supplied without the power conversion device 91 of the power system system shown in FIG. 11a. You can.
  • the power system shown in FIGS. 11D and 11E is overall similar to the power system shown in FIGS. 11B and 11C, but the difference is that the auxiliary output terminal outputs direct current power rather than alternating current power.
  • a modular multi-level converter 10 and a rectifier stage 10_1 having multiple output stages are used between the high-voltage AC distribution 90 and the propulsion motor 30 shown in FIGS. 11d to 11e, while the high-pressure
  • a typical inverter/converter may be used between the AC power distribution 90 and the remaining devices (e.g., energy storage system, large motor, etc.), or a modular multilevel converter may be used.
  • the modular multi-level converter 10 having multiple output stages in the power system shown in FIGS. 11D and 11E receives high-voltage direct current power (MVDC) as an input and operates the propulsion motor 30. Since it outputs high-voltage AC power for driving, if the power system includes high-voltage AC distribution (90), a rectifier stage (10_1) can be additionally placed in front of the modular multi-level converter (10) having multiple output stages. there is.
  • MVDC direct current power
  • low-voltage direct current power can be transmitted to low-voltage direct current distribution (LVDC) as shown in Figure 11d, but power is primarily transmitted to low-voltage direct current distribution (LVDC) as shown in Figure 11e, and power is transmitted from low-voltage direct current distribution (LVDC) through an inverter. Power can be transmitted secondarily through low-voltage alternating current distribution (LVAC).
  • LVDC low-voltage direct current distribution
  • LVAC low-voltage alternating current distribution
  • the rectifier stage 10_1 shown in FIGS. 11A to 11E may have the same/similar structure to a modular multi-level converter having a single output stage, which will be explained with reference to FIG. 12.
  • Figure 12 is a diagram schematically showing the modular multi-level converter 10 and the rectification stage 10_1 disposed in front of it.
  • the rectifier stage 10_1 has the same/similar structure to the modular multi-level converter having a single output stage described in FIG. 1. That is, the rectification stage receives high-voltage AC power from the high-voltage AC distribution (MVAC) through the input stage, converts it into high-voltage direct current power (MVDC), and outputs it, and the modular multi-level converter 10 operates the rectification stage (10_1) through the input stage. It can be confirmed that high-voltage direct current power (MVDC) is input from , converted to alternating current power, and output to the load end (e.g., motor).
  • MVAC high-voltage AC distribution
  • MVDC high-voltage direct current power
  • a propulsion motor is shown as an example of a load for convenience, but the load of the power system according to an embodiment disclosed in this document is not limited to the propulsion motor.
  • modular multi-level converter 10 shown in Figure 12 may be a modular multi-level converter having a single output stage as shown in Figure 11a, but is not limited thereto and may have multiple output stages as shown in Figures 11b and 11c. Branches may be modular multilevel converters.
  • FIGS. 13A to 13C are schematic diagrams of a power system in which a modular multi-level converter 50 is disposed between a high-voltage direct current distribution 20 and a generator 60 according to an embodiment disclosed in this document.
  • the power grid system may include a medium-voltage direct current (MVDC) distribution 20, a modular multilevel converter 50 with a single output stage, and a generator 60. You can. At this time, the modular multi-level converter 50 having a single output stage can be placed between the high-voltage direct current distribution 20 and the generator 60.
  • MVDC medium-voltage direct current
  • the power system may include a high-voltage direct current distribution 20, a modular multi-level converter 50 having multiple output stages, and a generator 60.
  • the modular multi-level converter 50 having multiple output stages can be placed between the high-voltage direct current distribution 20 and the generator 60.
  • the modular multilevel converter 50 of the power system system shown in FIGS. 13B and 13C has multiple output stages. Therefore, there is no need for an additional inverter to supply power to the service load. Through this, the limited space of the ship can be effectively utilized and maintenance is easy.
  • the modular multi-level converter 50 disposed between the high-voltage direct current distribution 20 and the generator 60 in Figure 13b receives alternating current power from the generator 60 and converts direct current power to the high-voltage direct current distribution 20. While outputting low-voltage alternating current power (LVAC) to the low-voltage alternating current distribution 70 for outputting and supplying alternating current power to service loads, the modular arrangement disposed between the high-voltage direct current distribution 20 and the generator 60 in FIG. 13C The multi-level converter 50 receives alternating current power from the generator 60, outputs direct current power to the high-voltage direct current distribution 20, and outputs low-voltage direct current power (LVDC) to the low-voltage direct current distribution 80 to supply alternating current power to the service load. ), there is a difference in output.
  • LVAC low-voltage alternating current power
  • FIGS. 14A to 14J show a single output stage or multiple output stages in the power system system in which the modular multi-level converter 50 is disposed between the high-voltage direct current distribution 20 and the generator 60 described with reference to FIGS. 13A and 13C. It shows an embodiment in which a modular multi-level converter 10 having a is further disposed between the high-voltage direct current distribution 20 and the propulsion motor 30.
  • a modular multi-level converter 50 having a single output stage is disposed between the high-voltage direct current distribution 20 and the generator 60, the high-voltage direct current distribution 20 and the propulsion It can be seen that a modular multi-level converter 10 having a single output stage is additionally disposed between the motors 30.
  • FIG. 14b shows a case where the modular multi-level converter 10 having multiple output stages transmits low-voltage DC power to the low-voltage DC power distribution 80 through an auxiliary output stage (e.g., a second output stage). It is not limited.
  • the modular multilevel converter 10 having multiple output stages may transmit low-voltage AC power to the low-voltage AC distribution through an auxiliary output stage (eg, a second output stage).
  • a modular multi-level converter 50 having multiple output stages is disposed between the high voltage DC distribution 20 and the generator 60, the high voltage DC distribution 20 ) and the propulsion motor 30. It can be seen that a modular multi-level converter 10 having a single output stage or multiple output stages is additionally disposed.
  • a modular multi-level converter 10 having a single output stage is additionally disposed between the high-voltage direct current distribution 20 and the propulsion motor 30, and separate power is used to supply power to the service load. It can be confirmed that an additional conversion device 40 is required.
  • the modular multi-level converter 10 which is additionally disposed between the high-voltage direct current distribution 20 and the propulsion motor 30 shown in FIGS. 14d and 14e, has multiple output stages and thus supplies power to the service load. It can be seen that there is no additional need for a separate power conversion device to do this.
  • Figure 14d shows a case where the modular multi-level converter 10 having multiple output stages transmits low-voltage AC power to the low-voltage AC distribution 70 through an auxiliary output stage (e.g., a second output stage).
  • 14E shows a case where the modular multi-level converter 10 having multiple output stages transmits low-voltage DC power to the low-voltage DC power distribution 80 through an auxiliary output stage (eg, a second output stage).
  • a modular multi-level converter 50 having multiple output stages is disposed between the high-voltage DC distribution 20 and the generator 60, the high-voltage DC distribution 20 ) and the propulsion motor 30. It can be seen that a modular multi-level converter 10 having a single output stage or multiple output stages is additionally disposed.
  • the modular multi-level converter 50 having multiple output stages disposed between the high-voltage DC distribution 20 and the generator 60 receives high-voltage AC power from the generator. receives input and outputs high-voltage direct current power and low-pressure alternating current power, while a modular multi-output terminal having multiple output terminals disposed between the high-voltage direct current distribution 20 and the generator 60 in the power system shown in FIGS. 14f to 14j It can be seen that the level converter 50 receives high-voltage AC power from the generator and outputs high-pressure DC power and low-pressure DC power.
  • FIGS. 14f and 14g in a power system system in which a modular multi-level converter 50 having multiple output stages is disposed between the high-voltage direct current distribution 20 and the generator 60, the high-voltage direct current distribution 20 ) and the propulsion motor 30.
  • a modular multi-level converter 10 having multiple output stages is additionally disposed.
  • Figure 14f shows a case where the additionally arranged modular multi-level converter 10 transmits low-voltage AC power to the low-voltage AC distribution 70 through an auxiliary output stage (e.g., a second output stage).
  • 14G shows a case where an additionally arranged modular multi-level converter 10 transmits low-voltage DC power to the low-voltage DC power distribution 80 through an auxiliary output stage (eg, a second output stage).
  • the low-voltage direct-current distribution 80 from the modular multi-level converter 50 disposed between the high-voltage direct-current distribution 20 and the generator 60 The point in which power is converted and transmitted is common, but there is a difference in that power is additionally transmitted from the low-voltage direct current distribution 80 to the low-voltage alternating current distribution 70 through a separate inverter.
  • a modular multi-level converter 10 having multiple output stages is additionally disposed between the high-voltage direct current distribution 20 and the propulsion motor 30, while the power system shown in FIG. 14h
  • a modular multi-level converter 10 having a single output stage is additionally disposed between the high-voltage direct current distribution 20 and the propulsion motor 30.
  • the low-voltage direct current distribution 80 from the modular multi-level converter 50 disposed between the high-voltage direct current distribution 20 and the generator 60
  • the point in which power is converted and transmitted is common, but in Figure 14i, there is a difference in that power is additionally transmitted from the low-voltage direct current distribution 80 to the low-voltage alternating current distribution 70 through a separate inverter.
  • the modular multi-level converter 10 additionally disposed between the high-voltage DC distribution 20 and the propulsion motor 30 provides low-voltage DC distribution. There is a difference in that direct current power is transmitted to (80).
  • the propulsion motor 30 requires a large amount of power, and according to an embodiment disclosed in this document, a modular multi-level converter 10 is added between the high-voltage direct current distribution 20 and the propulsion motor 30. When deployed, power can be stably supplied to the propulsion motor 30.
  • FIGS. 15A to 15D schematically show a power system system in which grids of essential loads and service loads are separated according to an embodiment disclosed in this document.
  • the essential load refers to a load that is essentially used when operating a ship
  • the service load refers to a load whose load can be varied depending on the situation.
  • the essential load can supply power consistently, and the service load can supply power variably.
  • the service load side can be easily controlled, thereby enabling efficient power management. becomes possible.
  • FIGS. 15A and 15B it can be seen that the first grid 1600 corresponding to the essential load end and the second grid 1700 corresponding to the service load end are electrically separated.
  • the first grid 1600 may include a high-voltage direct current distribution 1620, a propulsion motor 1630, and a modular multi-level converter 1610.
  • the first grid 1600 may additionally include a power source that supplies power, for example, an energy storage system (ESS), a fuel cell system (SOFC), a diesel generator (DG), and a shaft generator (Large Motor). ) may be additionally included.
  • ESS energy storage system
  • SOFC fuel cell system
  • DG diesel generator
  • DG shaft generator
  • a power conversion device may be used to transfer power supplied from a power source to the high-voltage direct current distribution 1620.
  • the power conversion device may be a general inverter, converter, etc., but is not limited thereto, and a modular multi-level converter having a single output stage or multiple output stages may be used.
  • the modular multi-level converter 1610 of the first grid 1600 may be a modular multi-level converter with a single output stage as shown in FIG. 15B, but is not limited thereto and as shown in FIG. 15A. It can be a modular multi-level converter with multiple output stages.
  • the modular multi-level converter 1610 has multiple output stages as shown in FIG. 15A, power can be transmitted simultaneously not only to the propulsion motor 30 but also to the lower load stage 1670.
  • the second grid 1700 may include a low-voltage AC power distribution unit 1710, a service load end 1720, and a variable speed generator 1730.
  • the first grid 1600 and the second grid 1700 are electrically separated as shown in FIGS. 15A and 15B, but in some cases, a switching operation is performed as shown in FIGS. 15C and 15D. Through this, the power of the first grid 1600 can be auxiliary transmitted to the second grid 1700.
  • a switch 1640 is connected between the auxiliary output terminal (second output terminal) of the modular multi-level converter 1610 having multiple output terminals of the first grid 1600 and the second grid 1700. ) is disposed, so that the power of the first grid 1600 can be shared with the second grid 1700 in an emergency.
  • a switch 1640 is added to the auxiliary output terminal of the modular multi-level converter 1610 having multiple output terminals of the first grid 1600 of FIG. 15C.
  • the modular multi-level converter 1610 of the first grid 1600 is shown to transmit low-voltage AC power to the second grid 1700, but the present invention is not limited thereto.
  • the modular multilevel converter 1610 of the first grid may transmit low-voltage direct current power to the second grid.
  • a switch 1640 is disposed between the modular multi-level converter 1650 having a single output terminal of the first grid 1600 and the high voltage direct current distribution 1620, so that in an emergency, the first The power of the grid 1600 may be shared with the second grid 1700.
  • a switch 1640 is additionally connected to the high voltage direct current distribution 1620 of the first grid 1600 of FIG. 15D, and a switch 1640 is connected between the switch 1640 and the second grid 1700. It can be seen that a modular multi-level converter 1650 having a single output stage is additionally placed.

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Abstract

La présente invention concerne un convertisseur multiniveau modulaire et un système d'alimentation l'utilisant. Le convertisseur multiniveau modulaire peut comprendre : une première unité de convertisseur ayant une branche selon une phase prédéfinie, la branche ayant un bras supérieur et un bras inférieur, et chacun du bras supérieur et du bras inférieur ayant une pluralité de sous-modules connectés en série de façon à convertir une puissance en courant continu, qui est entrée dans une borne d'entrée, en une puissance en courant alternatif ayant la phase, et à délivrer en sortie la puissance en courant alternatif à travers une première borne de sortie ; et une seconde unité de convertisseur qui convertit la puissance en courant continu, qui est entrée dans la borne d'entrée, en une puissance en courant alternatif ayant un niveau de tension inférieur au niveau de tension de la sortie de puissance en courant alternatif provenant du premier convertisseur, et délivre la puissance en courant alternatif à travers une seconde borne de sortie.
PCT/KR2023/016938 2022-10-27 2023-10-27 Convertisseur multiniveau modulaire et système d'alimentation l'utilisant Ceased WO2024091083A1 (fr)

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CN202380075888.2A CN120153566A (zh) 2022-10-27 2023-10-27 模块化多电平转换器及使用该转换器的电力系统
EP23883187.9A EP4611247A1 (fr) 2022-10-27 2023-10-27 Convertisseur multiniveau modulaire et système d'alimentation l'utilisant

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KR10-2022-0139958 2022-10-27
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KR20230077747 2023-06-16
KR1020230145982A KR102886015B1 (ko) 2022-10-27 2023-10-27 모듈형 멀티레벨 컨버터 및 이를 이용한 전력 계통 시스템
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CN107947146A (zh) * 2017-12-19 2018-04-20 湖南大学 基于模块化多电平变换器的直流电网及多层容错控制方法
KR20200125988A (ko) * 2018-04-27 2020-11-05 광저우 파워 서플라이 뷰로 오브 광동 파워 그리드 컴퍼니 리미티드 하프 브리지와 풀 브리지가 혼합된 모듈형 멀티레벨 컨버터의 기동 방법 및 장치
KR20210055415A (ko) * 2019-11-07 2021-05-17 영남대학교 산학협력단 모듈러 멀티레벨 컨버터
US20220166343A1 (en) * 2019-08-12 2022-05-26 Shanghai Jiao Tong University Solid-state transformer having uninterrupted operation ability under ac/dc fault and control method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080296970A1 (en) * 2005-04-25 2008-12-04 Railpower Technologies Corp. Multiple Prime Power Source Locomotive Control
CN107947146A (zh) * 2017-12-19 2018-04-20 湖南大学 基于模块化多电平变换器的直流电网及多层容错控制方法
KR20200125988A (ko) * 2018-04-27 2020-11-05 광저우 파워 서플라이 뷰로 오브 광동 파워 그리드 컴퍼니 리미티드 하프 브리지와 풀 브리지가 혼합된 모듈형 멀티레벨 컨버터의 기동 방법 및 장치
US20220166343A1 (en) * 2019-08-12 2022-05-26 Shanghai Jiao Tong University Solid-state transformer having uninterrupted operation ability under ac/dc fault and control method thereof
KR20210055415A (ko) * 2019-11-07 2021-05-17 영남대학교 산학협력단 모듈러 멀티레벨 컨버터

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