CN116581731A - Pure electric ship power distribution system, method and power system - Google Patents

Pure electric ship power distribution system, method and power system Download PDF

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Publication number
CN116581731A
CN116581731A CN202310569221.XA CN202310569221A CN116581731A CN 116581731 A CN116581731 A CN 116581731A CN 202310569221 A CN202310569221 A CN 202310569221A CN 116581731 A CN116581731 A CN 116581731A
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CN
China
Prior art keywords
voltage
low
direct current
alternating current
bus
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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.)
Pending
Application number
CN202310569221.XA
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Chinese (zh)
Inventor
张翠
曹国强
叶茂
周春锋
文铭
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Wuchang Shipbuilding Industry Group Co Ltd
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Wuchang Shipbuilding Industry Group 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 Wuchang Shipbuilding Industry Group Co Ltd filed Critical Wuchang Shipbuilding Industry Group Co Ltd
Priority to CN202310569221.XA priority Critical patent/CN116581731A/en
Publication of CN116581731A publication Critical patent/CN116581731A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
    • B63H21/17—Use of propulsion power plant or units on vessels the vessels being motor-driven by electric motor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/08—Three-wire systems; Systems having more than three wires
    • H02J1/084—Three-wire systems; Systems having more than three wires for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J5/00—Circuit arrangements for transfer of electric power between ac networks and dc networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The application discloses a pure electric ship power distribution system, a pure electric ship power distribution method and a pure electric ship power system, wherein the pure electric ship power distribution system comprises the following components: the direct current buses are used for receiving electric energy of the battery pack, each direct current bus section comprises a plurality of sub direct current buses, the adjacent sub direct current buses are connected through sub direct current breakers, and the number of the sub direct current buses is matched with that of the lithium batteries; alternating current bus bars for supplying power to ship propulsion and daily loads; the direct current-alternating current conversion module converts direct current of the direct current bus into alternating current and transmits the alternating current to the alternating current bus. The application effectively ensures the stability of ship power supply.

Description

Pure electric ship power distribution system, method and power system
Technical Field
The application relates to the technical field of pure electric power ships, in particular to a pure electric ship power distribution system, a pure electric ship power distribution method and a pure electric ship power system.
Background
The pure electric ship is used as a novel water channel transport means, mainly adopts a battery as power, has the advantages of small environmental pollution, quietness, high riding comfort level and the like, and is particularly suitable for being used as a ship with a fixed route and a short route, such as a ferry, a sightseeing ship, a inland cargo ship and the like.
At present, pure electric ship mainly includes hull, two at least group battery and distribution system, wherein, distribution system includes two at least direct current busbar, the one-to-one setting between every direct current busbar and the group battery, be connected through the bus switch between the direct current busbar, when the direct current busbar was in parallel operation state, the bus switch was in closed state, when being in the disconnection running state, the bus switch was in the disconnection state, when one of them direct current busbar appearance short circuit fault, if the direct current busbar was in parallel operation state, the bus switch failed to be opened in time or can not break, then can cause other direct current busbar appearance short circuit fault, if the direct current busbar was in the disconnection running state, also can cause other direct current busbar appearance short circuit fault when the bus has short circuit fault.
In summary, due to the bus switch, when one of the dc buses has a short-circuit fault, other dc buses without faults may have a short-circuit fault.
Content of the application
The embodiment of the application provides a pure electric ship power distribution system, a pure electric ship power distribution method and a pure electric ship power system, a bus switch between two sections of direct current buses is eliminated, the direct current buses independently operate, and when one direct current bus has a short circuit fault, normal power supply of other direct current buses without faults is ensured. In addition, each section of direct current bus is divided into a plurality of sections of bus connected by the circuit breakers according to the quantity of lithium batteries, the circuit breakers are all disconnected in a normal state, when a certain section of bus loses electricity due to the failure of the lithium battery pack, the adjacent bus, namely the direct current bus, is powered by closing the circuit breakers, and the power supply continuity of an electrical system is ensured again.
Other features and advantages of the application will be apparent from the following detailed description, or may be learned by the practice of the application.
According to a first aspect of an embodiment of the present application, there is provided a purely electric ship power distribution system comprising:
the direct current buses are used for receiving electric energy of the battery pack, each direct current bus section comprises a plurality of sub direct current buses, the adjacent sub direct current buses are connected through sub direct current breakers, and the number of the sub direct current buses is matched with that of the lithium batteries;
alternating current bus bars for supplying power to ship propulsion and daily loads;
the direct current-alternating current conversion module converts direct current of the direct current bus into alternating current and transmits the alternating current to the alternating current bus.
In some embodiments of the application, based on the foregoing, the ac bus includes:
a propulsion motor busbar for powering the propulsion motor;
and the daily load busbar is used for supplying power to the daily load of the ship.
In some embodiments of the present application, based on the foregoing, the dc-ac conversion module includes:
the motor frequency converter converts direct current of the direct current busbar into alternating current and transmits the alternating current to the propulsion motor busbar;
and the inverter converts the direct current of the direct current bus into alternating current and transmits the alternating current to the daily load bus.
In some embodiments of the application, based on the foregoing, a conversion transformer is provided between the inverter and the daily load busbar.
In some embodiments of the application, based on the foregoing, the daily load bus includes:
a low-voltage 380V busbar for receiving the alternating current output by the inverter and outputting low-voltage 380V alternating current;
a step-down transformer for receiving the low-voltage 380V alternating current output by the low-voltage 380V busbar and outputting the low-voltage 220V alternating current;
and the low-voltage 220V busbar receives the low-voltage 220V alternating current output by the step-down transformer.
In some embodiments of the present application, based on the foregoing scheme, the method further includes:
the first distribution box receives low-voltage 380V alternating current output by the low-voltage 380V busbar;
and the second distribution box is used for receiving the low-voltage 220V alternating current output by the low-voltage 220V busbar.
In some embodiments of the present application, based on the foregoing scheme, the method further includes:
the second charge-discharge plate is electrically connected with the low-voltage 380V bus bar;
the driving control console comprises a first low-voltage direct current distribution box and a first low-voltage alternating current distribution box, wherein the first low-voltage direct current distribution box is electrically connected with the second charging and discharging plate, and the first low-voltage alternating current distribution box is electrically connected with the low-voltage 220V busbar;
the centralized control platform comprises a second low-voltage direct current distribution box and a second low-voltage alternating current distribution box, wherein the second low-voltage direct current distribution box is electrically connected with the second charge-discharge plate, and the second low-voltage alternating current distribution box is electrically connected with the low-voltage 220V busbar;
the tail distribution box is electrically connected with the second charging and discharging plate;
and the second low-voltage direct-current storage battery is electrically connected with the second charge-discharge plate.
In some embodiments of the present application, based on the foregoing scheme, the method further includes:
a first charge-discharge plate electrically connected to the low-voltage 380V bus bar;
the tail emergency distribution box is electrically connected with the first charging and discharging plate;
the first low-voltage direct-current storage battery is electrically connected with the first charge-discharge plate.
In some embodiments of the application, based on the foregoing, the ac bus includes:
at least two sub-alternating current buses, and a sub-alternating current breaker is arranged between adjacent sub-alternating current buses.
In some embodiments of the application, the direct current buses are physically isolated, and when one of the direct current buses has a short circuit fault, the other direct current buses are not affected, so that the ship can normally run, and the stability of power supply of the ship is effectively ensured.
According to a second aspect of an embodiment of the present application, there is provided a power distribution method for a pure electric ship, including:
adopting direct current buses to receive electric energy of the battery pack, wherein the direct current buses are physically isolated, each section of direct current bus comprises a plurality of sub direct current buses, adjacent sub direct current buses are connected through sub direct current breakers, and the number of the sub direct current buses is matched with that of lithium batteries;
supplying power to the ship by adopting an alternating current bus;
and a direct current-alternating current conversion module is adopted to convert direct current of the direct current bus into alternating current and transmit the alternating current to the alternating current bus.
According to a third aspect of an embodiment of the present application, there is provided an electric only vessel power system comprising:
the pure electric ship power distribution system and the battery pack of the embodiment, wherein the battery pack supplies power for the direct-current bus.
The advantages of the embodiments of the second aspect and the third aspect may be referred to the advantages of the embodiments of the first aspect and the first aspect, and are not described here again.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. It is evident that the drawings in the following description are only some embodiments of the present application and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art. In the drawings:
fig. 1 shows a first schematic diagram of a purely electric marine power distribution system in an embodiment of the application;
fig. 2 shows a second schematic diagram of a purely electric marine power distribution system in an embodiment of the application.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the application may be practiced without one or more of the specific details, or with other methods, components, devices, steps, etc. In other instances, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the application.
The block diagrams depicted in the figures are merely functional entities and do not necessarily correspond to physically separate entities. That is, the functional entities may be implemented in software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.
The flow diagrams depicted in the figures are exemplary only, and do not necessarily include all of the elements and operations/steps, nor must they be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the order of actual execution may be changed according to actual situations.
It should be noted that: references herein to "a plurality" means two or more. "and/or" describes an association relationship of an association object, meaning that there may be three relationships, e.g., a and/or B may represent: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the objects so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in other sequences than those illustrated or otherwise described.
Fig. 1 shows a first schematic diagram of a power distribution system of a pure electric ship in an embodiment of the present application, fig. 2 shows a second schematic diagram of the power distribution system of the pure electric ship in the embodiment of the present application, and referring to fig. 1 and 2, a power distribution system of the pure electric ship is provided, and the power distribution system of the pure electric ship at least includes a dc bus bar, an ac bus bar, and a dc-ac conversion module, which is described in detail as follows:
and the direct current buses are used for receiving the electric energy of the battery pack, each direct current bus section comprises a plurality of sub direct current buses, the adjacent sub direct current buses are connected through sub direct current breakers, and the number of the sub direct current buses is matched with that of the lithium batteries.
In the application, the voltage of the direct current buses can be set according to actual conditions, such as 800-900V, the number of the direct current buses can be set according to actual conditions, such as 1#DC buses and 2#DC buses, different direct current buses can receive the electric energy of the same battery pack, also can receive the electric energy of different battery packs, such as 1#DC buses receive the electric energy of GB1, GB2, GB3, GB4, GB5 and GB11, 2#DC buses receive the electric energy of GB12, GB6, GB7, GB8, GB9 and GB10, the physical isolation between the direct current buses can be realized through the fact that the two direct current buses are not connected, the number of the sub-direct current buses can be the same as the number of lithium batteries, and one sub-direct current bus can be arranged for every two lithium batteries.
And the alternating current bus is used for supplying power for ship propulsion and daily loads.
In the present application, an ac bus may be used for power supply of ac equipment of a ship, in particular, the ac bus includes:
a propulsion motor bus to power the propulsion motors, which may include a main propulsion motor and a side propulsion motor, which may include a # 1 propulsion motor and a # 2 propulsion motor;
the daily load busbar supplies power to the daily load of the ship, which may include kitchen equipment, head consumer, head lighting equipment, tail lighting equipment, and various loads.
The direct current-alternating current conversion module converts direct current of the direct current bus into alternating current and transmits the alternating current to the alternating current bus.
Specifically, the dc-ac conversion module includes:
the motor frequency converter converts direct current of the direct current busbar into alternating current and transmits the alternating current to the propulsion motor busbar;
and the inverter converts the direct current of the direct current bus into alternating current and transmits the alternating current to the daily load bus.
In the application, a conversion transformer is arranged between the inverter and the daily load bus, and the conversion transformer converts the output voltage of the inverter into the voltage required by the daily load bus, such as 380V.
In the present application, the daily load bus includes:
a low-voltage 380V busbar for receiving the alternating current output by the inverter and outputting low-voltage 380V alternating current;
a step-down transformer for receiving the low-voltage 380V alternating current output by the low-voltage 380V busbar and outputting the low-voltage 220V alternating current;
and the low-voltage 220V busbar receives the low-voltage 220V alternating current output by the step-down transformer.
Specifically, the voltage of the low-voltage 380V ac may be 380V and the voltage of the low-voltage 220V ac may be 220V.
In the present application, further comprising:
the first distribution box receives low-voltage 380V alternating current output by the low-voltage 380V busbar;
and the second distribution box is used for receiving the low-voltage 220V alternating current output by the low-voltage 220V busbar.
Specifically, the first distribution box is used for power distribution of low-voltage 380V alternating current, and the second distribution box is used for power distribution of low-voltage 220V alternating current.
In the present application, further comprising:
the second charge-discharge plate is electrically connected with the low-voltage 380V bus bar;
the driving control console comprises a first low-voltage direct current distribution box and a first low-voltage alternating current distribution box, wherein the first low-voltage direct current distribution box is electrically connected with the second charging and discharging plate, and the first low-voltage alternating current distribution box is electrically connected with the low-voltage 220V busbar;
the centralized control platform comprises a second low-voltage direct current distribution box and a second low-voltage alternating current distribution box, wherein the second low-voltage direct current distribution box is electrically connected with the second charge-discharge plate, and the second low-voltage alternating current distribution box is electrically connected with the low-voltage 220V busbar;
the tail distribution box is electrically connected with the second charging and discharging plate;
and the second low-voltage direct-current storage battery is electrically connected with the second charge-discharge plate.
When the power supply of the low-voltage 380V bus is normal, the second charge-discharge plate charges the second low-voltage direct-current storage battery, and simultaneously supplies power to the first low-voltage direct-current distribution box, the second low-voltage direct-current distribution box and the tail distribution box, when the low-voltage 380V bus fails, the second low-voltage direct-current storage battery supplies power to the first low-voltage direct-current distribution box, the second low-voltage direct-current distribution box and the tail distribution box through the second charge-discharge plate, and after the power supply of the low-voltage 380V bus is recovered, the second charge-discharge plate charges the second low-voltage direct-current storage battery again.
In the present application, further comprising:
a first charge-discharge plate electrically connected to the low-voltage 380V bus bar;
the tail emergency distribution box is electrically connected with the first charging and discharging plate;
the first low-voltage direct-current storage battery is electrically connected with the first charge-discharge plate.
When the power supply of the low-voltage 380V bus is normal, the first charge-discharge plate charges the first low-voltage direct-current storage battery, meanwhile, the power supply of the tail emergency distribution box is performed, when the low-voltage 380V bus fails and cannot normally supply power, the first low-voltage direct-current storage battery supplies power to the tail emergency distribution box through the first charge-discharge plate, and after the power supply of the low-voltage 380V bus is recovered, the first charge-discharge plate charges the first low-voltage direct-current storage battery again.
In the present application, the ac bus includes:
at least two sub-alternating current buses, and a sub-alternating current breaker is arranged between adjacent sub-alternating current buses.
For a better understanding of the present embodiment, a specific example is provided as follows:
the pure electric ship power distribution system comprises a direct current bus bar, an alternating current bus bar and a direct current-alternating current conversion module, wherein the voltage of the direct current bus bar is 800-900V, the direct current bus bar comprises a 1#DC bus bar and a 2#DC bus bar, physical isolation is carried out between the 1#DC bus bar and the 2#DC bus bar in a non-connection mode, the 1#DC bus bar receives electric energy of GB1, GB2, GB3, GB4, GB5 and GB11, the 2#DC bus bar receives electric energy of GB12, GB6, GB7, GB8, GB9 and GB10, and the pure electric ship power distribution system is characterized in that for a battery GB i To be specific, the battery plug-in boxes BCZ are respectively plugged in the corresponding battery plug-in boxes i On the battery socket box and the direct current bus bar through the corresponding breaker KB i Electrical connection, wherein i=1, 2, … …,12.
The 1#DC bus is divided into three sub-DC buses of DC BUSA, DC BUSB and DC BUSC, and a breaker KB is arranged between the DC BUSA and the DC BUSB 13 A breaker KB is arranged between the DC BUSB and the DC BUSC 14 The 2#DC bus is divided into three sub-branches of DC BUSE, DC BUSF and DC BUSGA breaker KB is arranged between the current bus bar, the DC BUSE and the DC BUSF 15 A breaker KB is arranged between the DC BUSF and the DC BUSG 16 The alternating current bus comprises a propulsion motor bus and a daily load bus, the propulsion motor bus comprises an AC BUSA, an AC BUSB and an AC BUSC, the voltage of the propulsion motor bus is 380V, the propulsion motor bus is used for supplying power to the propulsion motor, the propulsion motor can comprise a main propulsion motor and a side propulsion motor, and the main propulsion motor can comprise a 1# propulsion motor and a 2# propulsion motor.
The direct current-alternating current conversion module comprises a motor frequency converter and an inverter, wherein the motor frequency converter comprises FC1, FC2 and FC3, the motor frequency converter converts direct current of a direct current busbar into alternating current, the alternating current is transmitted to a propulsion motor busbar, the inverter converts the direct current of the direct current busbar into alternating current, the alternating current is transmitted to a daily load busbar, the inverter comprises 1T and 2T, and the inverter is an isolation inverter.
The daily load busbar comprises a low-voltage 380V busbar, a step-down transformer and a low-voltage 220V busbar, wherein the low-voltage 380V busbar is a 1# AC busbar, the low-voltage 380V busbar comprises an AC BUSD and an AC BUSE, a contactor is arranged between the AC BUSD and the AC BUSE, the low-voltage 380V busbar receives alternating current output by an inverter and outputs low-voltage 380V alternating current, the voltage of the low-voltage 380V alternating current is 380V, the step-down transformer comprises 3T and 4T, the low-voltage 380V alternating current output by the low-voltage 380V busbar is received and outputs low-voltage 220V alternating current, the low-voltage 220V busbar is a 2# AC busbar, the low-voltage 220V busbar receives low-voltage 220V alternating current output by the step-down transformer, and the voltage of the low-voltage 220V alternating current is 220V.
The 1#ac bus is used for power supply of kitchen equipment P1, first head consumer P2 and various AC loads, and power supply of tail distribution boxes TE1 and TE2, first low-voltage direct-current distribution box LP1, second low-voltage direct-current distribution box LP2, charging of second low-voltage direct-current storage battery, voltage of second low-voltage direct-current storage battery being 24V,2#ac bus being used for power supply of air conditioner P3, second head consumer P3, head lighting device L1, tail lighting device L2 and various AC loads, and power supply of tail emergency distribution box EL through first charging and discharging board CHP1, voltage of tail emergency distribution box EL being direct-current 220V, charging of first low-voltage direct-current storage battery, voltage of first low-voltage direct-current storage battery being 220V.
The head lighting equipment L1 is a head lighting distribution box, and the head is independently provided with the distribution box, so that the number of cables from the tail cabin to the head can be saved.
In summary, the direct current buses are physically isolated, when one of the direct current buses has a short circuit fault, other direct current buses are not affected, normal operation can be achieved, and the stability of ship power supply is effectively guaranteed. In addition, each section of direct current bus is divided into a plurality of sections of buses connected by the circuit breakers according to the quantity of the lithium batteries, the circuit breakers are all disconnected in a normal state, when the fault of the lithium battery pack leads to the power failure of a certain section of direct current bus, namely the buses, then the adjacent direct current buses, namely the buses, are powered by closing the circuit breakers, and the power supply continuity of an electrical system is ensured again.
According to a second aspect of an embodiment of the present application, there is provided a power distribution method for a pure electric ship, including:
adopting direct current buses to receive electric energy of the battery pack, wherein the direct current buses are physically isolated, each section of direct current bus comprises a plurality of sub direct current buses, adjacent sub direct current buses are connected through sub direct current breakers, and the number of the sub direct current buses is matched with that of lithium batteries;
supplying power to the ship by adopting an alternating current bus;
and a direct current-alternating current conversion module is adopted to convert direct current of the direct current bus into alternating current and transmit the alternating current to the alternating current bus.
According to a third aspect of an embodiment of the present application, there is provided an electric only vessel power system comprising:
the pure electric ship power distribution system and the battery pack of the embodiment, wherein the battery pack supplies power to the direct-current bus bar, and the battery pack comprises GB i Where i=1, 2, … …,12.
The battery pack can be a container type battery formed by lithium iron phosphate batteries, the battery pack is convenient to change electricity, each lithium battery stores electric energy 1992KWh, referring to fig. 1 and 2, the electric energy required by a propulsion motor and a daily load is smaller than the electric energy provided by 12 lithium batteries, namely, the power supply of the lithium batteries has redundancy, so that when one lithium battery fails, other lithium batteries can normally supply power, and the propulsion motor and the daily load can normally work.
It should be noted that the above-mentioned embodiments illustrate rather than limit the application, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order. These words may be interpreted as names.
The above description is only an example of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims (10)

1. Pure electric ship distribution system, its characterized in that includes:
the direct current buses are used for receiving the electric energy of the battery pack and are physically isolated;
alternating current bus bars for supplying power to ship propulsion and daily loads;
the direct current-alternating current conversion module converts direct current of the direct current bus into alternating current and transmits the alternating current to the alternating current bus.
2. The system of claim 1, wherein the ac bus comprises:
a propulsion motor busbar for powering the propulsion motor;
and the daily load busbar is used for supplying power to the daily load of the ship.
3. The system of claim 2, wherein the dc to ac conversion module comprises:
the motor frequency converter converts direct current of the direct current busbar into alternating current and transmits the alternating current to the propulsion motor busbar;
and the inverter converts the direct current of the direct current bus into alternating current and transmits the alternating current to the daily load bus.
4. A system according to claim 3, characterized in that a conversion transformer is provided between the inverter and the daily load busbar.
5. The system of claim 2, wherein the daily load bus comprises:
a low-voltage 380V busbar for receiving the alternating current output by the inverter and outputting low-voltage 380V alternating current;
a step-down transformer for receiving the low-voltage 380V alternating current output by the low-voltage 380V busbar and outputting the low-voltage 220V alternating current;
and the low-voltage 220V busbar receives the low-voltage 220V alternating current output by the step-down transformer.
6. The system of claim 5, further comprising:
the first distribution box receives low-voltage 380V alternating current output by the low-voltage 380V busbar;
and the second distribution box is used for receiving the low-voltage 220V alternating current output by the low-voltage 220V busbar.
7. The system of claim 5, further comprising:
the second charge-discharge plate is electrically connected with the low-voltage 380V bus bar;
the driving control console comprises a first low-voltage direct current distribution box and a first low-voltage alternating current distribution box, wherein the first low-voltage direct current distribution box is electrically connected with the second charging and discharging plate, and the first low-voltage alternating current distribution box is electrically connected with the low-voltage 220V busbar;
the centralized control platform comprises a second low-voltage direct current distribution box and a second low-voltage alternating current distribution box, wherein the second low-voltage direct current distribution box is electrically connected with the second charge-discharge plate, and the second low-voltage alternating current distribution box is electrically connected with the low-voltage 220V busbar;
the tail distribution box is electrically connected with the second charging and discharging plate;
and the second low-voltage direct-current storage battery is electrically connected with the second charge-discharge plate.
8. The system of claim 5, further comprising:
a first charge-discharge plate electrically connected to the low-voltage 380V bus bar;
the tail emergency distribution box is electrically connected with the first charging and discharging plate;
the first low-voltage direct-current storage battery is electrically connected with the first charge-discharge plate.
9. The power distribution method of the pure electric ship is characterized by comprising the following steps of:
adopting direct current buses to receive electric energy of the battery pack, wherein the direct current buses are physically isolated, each section of direct current bus comprises a plurality of sub direct current buses, adjacent sub direct current buses are connected through sub direct current breakers, and the number of the sub direct current buses is matched with that of lithium batteries;
supplying power to the ship by adopting an alternating current bus;
and a direct current-alternating current conversion module is adopted to convert direct current of the direct current bus into alternating current and transmit the alternating current to the alternating current bus.
10. Pure electric ship power system, comprising:
the electric only marine power distribution system and battery pack of claims 1-8, said battery pack powering a dc bus.
CN202310569221.XA 2023-05-17 2023-05-17 Pure electric ship power distribution system, method and power system Pending CN116581731A (en)

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Application Number Priority Date Filing Date Title
CN202310569221.XA CN116581731A (en) 2023-05-17 2023-05-17 Pure electric ship power distribution system, method and power system

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Application Number Priority Date Filing Date Title
CN202310569221.XA CN116581731A (en) 2023-05-17 2023-05-17 Pure electric ship power distribution system, method and power system

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