CN105966590A - Vehicle-passenger ferry provided with energy storage unit type hybrid electric propelling system - Google Patents
Vehicle-passenger ferry provided with energy storage unit type hybrid electric propelling system Download PDFInfo
- Publication number
- CN105966590A CN105966590A CN201610488980.3A CN201610488980A CN105966590A CN 105966590 A CN105966590 A CN 105966590A CN 201610488980 A CN201610488980 A CN 201610488980A CN 105966590 A CN105966590 A CN 105966590A
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- Prior art keywords
- power
- components
- energy
- hybrid electric
- storage units
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
- B63H21/17—Use of propulsion power plant or units on vessels the vessels being motor-driven by electric motor
-
- 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
- B63H21/21—Control means for engine or transmission, specially adapted for use on marine vessels
-
- 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
- B63H21/21—Control means for engine or transmission, specially adapted for use on marine vessels
- B63H2021/216—Control means for engine or transmission, specially adapted for use on marine vessels using electric control means
Abstract
The invention relates to a vehicle-passenger ferry provided with an energy storage unit type hybrid electric propelling system. The vehicle-passenger ferry comprises a ferry body, wherein power generation components, energy storage components, power distribution and supply components, propelling components, propeller components and control and management components are arranged on the ferry body; the power generation components and the energy storage components are connected with the power distribution and supply components, the power distribution and supply components are connected with the propelling components and the propeller components, the propelling components are connected with the propeller components, and the power generation components, the energy storage components, the power distribution and supply components, the propelling components and the propeller components are connected with the control and management components; diesel power generation components and shore power access components are connected with a ferry electric power system through change-over switches. The energy saving benefits can be further improved through the energy storage components, meanwhile, the problem about time difference of increasing of the power of a power station and increasing of the propelling power is solved, the power supply reliability of a power grid is further improved, energy consumption and the cost are further reduced, and the energy-saving and environment-friendly effects are improved.
Description
Technical field
The invention belongs to technical field of ships, be specifically related to a kind of band energy-storage units blended electric power and push away
Enter the car passenger ferry of system.
Background technology
Coming into operation to turning oar full circle swinging vehicle ferry along with first, from this, advanced returns entirely
Oar of coming about instead of the conventional propulsion mode of four oar eight rudders, drastically increases the peace that car visitor ships
Full property and operation economic benefit.In recent years, design and the device fabrication level of car passenger ferry is carried out
Persistently promote, but propulsion mode still uses Diesel Engine Mechanical Promoting Form.Some are new at present
Type propulsion mode such as electric propulsion is progressively ripe along with correlation technique, starts on inland navigation craft
Promoting the use of, this has also agreed with, and current Ship Propeling energy source and power mode is diversified, it is energy-conservation to advocate
The main trend reduced discharging.The basic ship type of car passenger ferry tends towards stability the most, uses electric propulsion
Technical substitution traditional mechanical advance be promote further ship industry quick, safe and environment-friendly, energy-conservation,
The important directions of comfortableness, the most in recent years, land electric vehicle energy storage technology obtains soon
Speed development, has reached the practical stage, and car passenger ferry single shipping distance and total endurance are the most relatively
Little, propeller power is the most also at 600kW or less, therefore, uses band energy-storage units mixing electricity
Power Push Technology is also the important directions of car passenger ferry electric propulsion technology development.Existing more
Advanced car passenger ferry propulsion mode substantially uses diesel engine extension shaft system's driving Z (L)
The form of type rudder oar, this mechanical type Z (L) type type of drive is due to axle system head, and deposits
Arrange in certain angle, need many group intermediate bearings and Hooks coupling universal coupling, thus have machine more
Device place arrangement requirement is higher, takes up room many, and transmission loss is relatively big, operating noise, vibration
The problem such as the biggest.For this reason, it may be necessary to the car visitor of a kind of band energy-storage units hybrid electric propulsion system
Ferryboat, solves the problems referred to above in the presence of prior art, and the bavin-electricity with energy-storage units is complete
Revolution electric propulsion advances than the bavin-electricity full circle swinging without energy-storage units, can improve further
Energy-saving benefit, makes up the time difference problem that power station power promotes with propeller power simultaneously, and enters
One step improves the reliability that electrical network is powered, and reduces power consumption cost further, improves energy-saving ring
Protect effect.
Summary of the invention
The present invention provides the car passenger ferry of a kind of band energy-storage units hybrid electric propulsion system, solves
The problems referred to above in the presence of prior art, can improve bavin-electricity further with energy-storage units
The energy-saving benefit advanced, makes up the time difference problem that power station power promotes with propeller power simultaneously,
And further increase the reliability that electrical network is powered, and bank base charging pile can be used to supplement
Electric energy, thus reduce power consumption cost further, improve effects of energy conservation and environmental protection,.
For achieving the above object, the present invention provides a kind of band energy-storage units hybrid electric propulsion system
Car passenger ferry, including hull, hull is provided with diesel generation parts, energy storage component, joins confession
Electricity parts, propulsive element, thruster part and control management parts；Diesel generation parts and storage
Can be connected with joining power supply part by parts, join power supply part and propulsive element and thruster part phase
Connecting, propulsive element is connected with thruster part, diesel generation parts, energy storage component, joins
Power supply part, propulsive element are connected with control management parts respectively with thruster part；Diesel oil
Electrical generation components and bank are electrically accessed parts to be passed through to cut by permutator and Ship Electrical Power System respectively
Form of changing connects；Bank is electrically accessed parts and accesses Ship Electrical Power System when ship berthing, for energy storage
Parts charge and are the daily power supplies of boats and ships, and now diesel generation parts do not supply for Ship Electrical Power System
Electricity.
In above scheme preferably, diesel generation parts are set to generating set.
It may also be preferred that energy storage component is set to the power battery pack of ternary material.
It may also be preferred that join power supply part to be set to power distribution cabinet.
It may also be preferred that propulsive element is set to converter.
It may also be preferred that thruster part is set to electricity drives full-rotating rudder paddle.
It may also be preferred that Control management system be power station power management system (PMS) and
Rudder blade control system.
It may also be preferred that electricity drives full-rotating rudder paddle is set to driven by power full circle swinging Z-type or L
Type rudder oar.
It may also be preferred that generating set includes three diesel-driven generators.
It may also be preferred that three diesel-driven generators there are a diesel-driven generator be set to standby
Electromotor.
Compared with prior art, the invention have the advantages that
The invention provides the car passenger ferry of a kind of band energy-storage units hybrid electric propulsion system, energy
Enough solve the problems with in the presence of prior art: (1) is according to the speed of a ship or plane of boats and ships, molded line etc.
Staple, adjusts in conjunction with hydrodynamicses such as resistance propellings, calculates propeller power needed for boats and ships,
Car passenger ferry other electric powers in addition to advancing are the least, mainly control electricity consumption, light fixture electricity consumption
And cabin minitype air conditioner electricity consumption etc., should count, when design considers power station power, the appearance that always generates electricity in the lump
Amount, it is to avoid separately set generating set or main electrical power plant power is less than normal, bring risk to ship power supply.
The amplitude of variation requirement to propeller power during Ship Controling need to be considered, determine electromotor
The number of units of group, and make corresponding and car, off-the-line strategy, both ensured to bear at net generating set
Lotus rate optimization, efficiency of combustion is higher, avoids simultaneously or reduce the risk of electrical breakdown；(2)
On ship, electrical equipment comprises a large amount of nonlinear characteristic electrical equipment, and power supply supply is sinusoidal wave form
Voltage, but owing to non-linear electrical equipment has non-linear voltage-current characteristics, thus at electricity
Net creates a large amount of harmonic wave.The main source of this fractional harmonic is converter, and is electrical network
The main source of middle harmonic wave, needs emphasis suppression, administers.Car passenger ferry electric propulsion system is adopted
By Active Front End (AFE) technology, distribution system is made (to include main distribution board, point electric power everywhere
Special bus-bar of panel, electric propulsion etc.) the total harmonic distortion (THD) of voltage waveform
CCS (CCS) specification specifies；(3) the main line voltage of car passenger ferry selects 400V low
Pressure system is conducive to system to constitute and lectotype selection；(4) automatization's control of the car passenger ferry researched and developed
System processed includes power station power management system (PMS) and propulsion system control system.PMS is
One of Key Control of Electrical Propulsion Ship, mainly completes generator set control and energy pipe
The functions such as reason, ensure that electric power system can for watercraft electric propulsion system and the offer of other electrical equipment
Lean on, stable supply of electric power；(5) by comparing, researching and analysing supercapacitor technologies, lithium
Ferric phosphate lithium cell in battery technology, and dynamic lithium battery and the energy of ternary material battery
Density, service life, temperature range, terminal voltage change, heat stability, the feature of environmental protection etc., choosing
Take the power battery pack of the superior ternary material of combination property as energy storage elementary cell, its energy
Density meets Department of Science and Technology's demand for development to electrokinetic cell energy density.It has following useful effect
Really: (1) uses bavin-electricity to add the hybrid electric propulsion technology of energy-storage module, is in marine technology
Important innovations；(2) improve the maneuverability of car passenger ferry, unsinkability, safety, quick
Property；(3) improve car passenger ferry electromotor synthetic operation efficiency and economy that the Changjiang river car visitor ships
Property, controlling, improve noise and the vibration of boats and ships, effects of energy saving and emission reduction is significantly better than diesel engine
Mechanically-propelled car passenger ferry；(4) employing ternary material battery is as energy-storage units, the most recyclable
The unnecessary electric energy of generating set, it is also possible to base charging pile electric energy supplement of pulling in shore, is that future car visitor crosses
The developing direction of ship electric propulsion system, it is possible to reduce later maintenance and power consumption cost, further
Improve environmental protection and energy saving.Compared to bavin-electricity Electrical Propulsion Ship, can select according to payload
Powering mode, it is ensured that the fuel economy under all operating modes, and redundancy is good；Compared to pure
Electric ship, initial stage input cost is low, and flying power is strong.
Accompanying drawing explanation
Fig. 1 is the electricity of the car passenger ferry of the band energy-storage units hybrid electric propulsion system of the present invention
Try hard to recommend into system architecture diagram；
Fig. 2 is the one of the car passenger ferry of the band energy-storage units hybrid electric propulsion system of the present invention
The side view of individual embodiment；
Fig. 3 is the band energy-storage units hybrid electric propulsion of the present invention according to embodiment illustrated in fig. 2
The front view of the car passenger ferry of system；
Fig. 4 is the band energy-storage units hybrid electric propulsion of the present invention according to embodiment illustrated in fig. 2
The deck level schematic diagram of the car passenger ferry of system；
Fig. 5 is the band energy-storage units hybrid electric propulsion of the present invention according to embodiment illustrated in fig. 2
The upper saloon deck floor map of the car passenger ferry of system；
Fig. 6 is the band energy-storage units hybrid electric propulsion of the present invention according to embodiment illustrated in fig. 2
The bridge Platform Deck schematic diagram of the car passenger ferry of system；
Fig. 7 is the band energy-storage units hybrid electric propulsion of the present invention according to embodiment illustrated in fig. 2
The bilge floor map of the car passenger ferry of system；
Fig. 8 is the band energy-storage units hybrid electric propulsion of the present invention according to embodiment illustrated in fig. 2
The navigation deck plane graph of the car passenger ferry of system；
Fig. 9 is the another of the car passenger ferry of the band energy-storage units hybrid electric propulsion system of the present invention
The side view of one embodiment；
Figure 10 is that the band energy-storage units blended electric power of the present invention according to embodiment illustrated in fig. 9 pushes away
Enter the front view of the car passenger ferry of system；
Figure 11 is that the band energy-storage units blended electric power of the present invention according to embodiment illustrated in fig. 9 pushes away
Enter the deck level schematic diagram of the car passenger ferry of system；
Figure 12 is that the band energy-storage units blended electric power of the present invention according to embodiment illustrated in fig. 9 pushes away
Enter the Accommodation Deck schematic diagram of the car passenger ferry of system；
Figure 13 is that the band energy-storage units blended electric power of the present invention according to embodiment illustrated in fig. 9 pushes away
Enter the bilge floor map of the car passenger ferry of system；
Figure 14 is that the band energy-storage units blended electric power of the present invention according to embodiment illustrated in fig. 9 pushes away
Enter the navigation deck schematic diagram of the car passenger ferry of system；
Figure 15 is that the band energy-storage units blended electric power of the present invention according to embodiment illustrated in fig. 9 pushes away
Enter the accomodation deck schematic diagram of the car passenger ferry of system；
Figure 16 be the car passenger ferry of the band energy-storage units hybrid electric propulsion system of the present invention again
The side view of one embodiment；
Figure 17 is that the band energy-storage units blended electric power of the present invention according to embodiment illustrated in fig. 16 pushes away
Enter the front view of the car passenger ferry of system；
Figure 18 is that the band energy-storage units blended electric power of the present invention according to embodiment illustrated in fig. 16 pushes away
Enter the main deck floor map of the car passenger ferry of system；
Figure 19 is that the band energy-storage units blended electric power of the present invention according to embodiment illustrated in fig. 16 pushes away
Enter the accomodation deck schematic diagram of the car passenger ferry of system；
Figure 20 is that the band energy-storage units blended electric power of the present invention according to embodiment illustrated in fig. 16 pushes away
Enter the outdoor arrangement sketch of the car passenger ferry of system；
Figure 21 is that the band energy-storage units blended electric power of the present invention according to embodiment illustrated in fig. 16 pushes away
Enter the bilge schematic diagram of the car passenger ferry of system；
Figure 22 is that the band energy-storage units blended electric power of the present invention according to embodiment illustrated in fig. 16 pushes away
Enter the navigation deck schematic diagram of the car passenger ferry of system；
Figure 23 is that the band energy-storage units blended electric power of the present invention according to embodiment illustrated in fig. 16 pushes away
Enter the bridge Platform Deck schematic diagram of the car passenger ferry of system；
Figure 24 is that the band energy-storage units blended electric power of the present invention according to embodiment illustrated in fig. 16 pushes away
Enter the compass deck schematic diagram of the car passenger ferry of system.
Detailed description of the invention
In order to be more fully understood that the present invention, below in conjunction with specific embodiment, the present invention is made in detail
Explanation.It is clear that the present invention can be carried out different modification and remodeling and without departing from rear attached power
Profit requires the broader spirit and scope of the present invention limited.Therefore, following example have illustration
Property and do not have conditional implication.
Embodiment:
The car passenger ferry of a kind of band energy-storage units hybrid electric propulsion system, including hull, hull
It is provided with diesel generation parts, energy storage component, joins power supply part, propulsive element, propeller portion
Part and control management parts；Diesel generation parts and energy storage component are connected with joining power supply part,
Join power supply part to be connected with propulsive element and thruster part, propulsive element and thruster part
It is connected, diesel generation parts, energy storage component, joins power supply part, propulsive element and propeller
Parts are connected with control management parts respectively；Diesel generation parts and bank are electrically accessed parts respectively
It is connected by switch forms with Ship Electrical Power System by permutator；Bank is electrically accessed parts and exists
During ship berthing access Ship Electrical Power System, for energy storage component charging and be the daily power supplies of boats and ships,
Now diesel generation parts are not powered for Ship Electrical Power System.
In the above-described embodiments, diesel generation parts are set to generating set.
In the above-described embodiments, energy storage component is set to the power battery pack of ternary material.
In the above-described embodiments, join power supply part and be set to power distribution cabinet.
In the above-described embodiments, propulsive element is set to converter.
In the above-described embodiments, thruster part is set to electricity and drives full-rotating rudder paddle.
In the above-described embodiments, Control management system be power station power management system (PMS) and
Rudder blade control system.
In the above-described embodiments, electricity drives full-rotating rudder paddle and is set to driven by power full circle swinging Z-type or L
Type rudder oar.
In the above-described embodiments, generating set includes three diesel-driven generators.
In the above-described embodiments, three diesel-driven generators there is a diesel-driven generator be set to standby
Electromotor.
The car passenger ferry of the band energy-storage units hybrid electric propulsion system of the present invention, diesel-driven generator
Group out-put supply accesses ac-dc-ac frequency converter；Power battery pack passes through two-way DC/DC changer
Access the dc bus of ac-dc-ac frequency converter, then by DC/AC inversion unit by DC inversion
Supplying propulsion electric machine for alternating current, boats and ships non-propulsion electrical equipment passes through small-sized DC/AC inverter
It is connected on the outfan of power battery pack.Electricity generation module and the bank electricity of three diesel-driven generator compositions connect
Entering parts uses switch forms to be connected by permutator with Ship Electrical Power System respectively, bank electricity
Accessing parts is energy storage component charging when ship berthing, and now diesel generation parts are not boats and ships
Power system power supply.
The car passenger ferry of the band energy-storage units hybrid electric propulsion system of the present invention, can be filled by bank electricity
The power source of the electric propulsion system of the hybrid power boats and ships of energy arranges bavin-group of motors simultaneously and moves
Power set of cells two ways, diesel generating set out-put supply accesses the friendship of ac-dc-ac frequency converter
Stream input；Power battery pack accesses ac-dc-ac frequency converter by two-way DC/DC changer
Dc bus, then by DC/AC inversion unit by DC inversion be alternating current supply propulsion electric machine
M, boats and ships non-propulsion electrical equipment is connected on the defeated of power battery pack by small-sized DC/AC inverter
Go out end.Boats and ships pull in shore period, bank supply electricity to power battery pack charging；Lowsteaming or when berthing
Use power battery pack is powered；During normal/cruise, bavin-group of motors power and simultaneously to power
Set of cells is charged, it is possible to use bavin-group of motors is powered together with power battery pack.
The car passenger ferry of the band energy-storage units hybrid electric propulsion system of the present invention, it has as follows
Feature: (1) uses small-power (such as 239kW) He Yitai high-power (such as a 300kW) unit
Omnidistance operation, three diesel generating set structures of another small-power (such as 239kW) unit reserve
Become electricity generation module, determine in net electromotor number of units according to advancing working condition requirement so that diesel engine
Efficiency of combustion is good, improves ship energy saving emission reduction effect；(2) Active Front End (AFE) is used
Technology, makes total harmonic distortion (THD) CCS of distribution system voltage waveform everywhere
(CCS) specification regulation, than using, passive-type harmonic suppression technique and poly phase rectification are active humorous
Ripple suppression technology is more preferable to suppression, the regulation effect of harmonic wave；(3) 400V low voltage electric network system
Matching with the electricity system of major part shipborne equipment, decrease middle power transformation link, energy-saving effect is more
Good, reliability is higher；(4) power station power management system (PMS) passes through power distribution equipment to ship
Oceangoing ship electricity is allocated, and reasonable adjusting, in the rate of load condensate of net generating set, maximally utilises
The power in power station, can save on the premise of ensureing Ship Electrical Power System safety to greatest extent
The energy, improves boats and ships economy；The load condition of Solid rocket engine unit is monitored simultaneously,
Prevent generating set from overloading, it is to avoid full ship power failure danger occurs；(5) ternary material battery is used
Group constitutes energy-storage module as energy storage elementary cell, and utilizing energy-storage module will be many when system underloading
Remaining energy (energy in power station and the energy of load feedback telegram in reply net) stores, and prevents
Only this energy impact to electrical network.When system overload, the energy release that energy-storage module will store
Meet the demand of load.Energy-storage module thus can be utilized to calm down the fluctuation of load to system
The negative effect brought.(diesel-driven generator is all the time so that power station holding is stablized for energy-storage module
It is operated near best operating point), fuel utilization ratio can be improved, save fuel oil, it is thus achieved that higher
Economic benefit.
Although below various preferred implementations and feature to the present invention are described,
But on the premise of without departing from the purpose of the present invention and objective, those of ordinary skill in the art are permissible
The present invention makes many change, supplement, change and delete.Concrete above in association with the present invention
The detailed description that embodiment is done, is not limitation of the present invention.Every skill according to the present invention
Art essence, to any simple modification made for any of the above embodiments, all still falls within technical solution of the present invention
Scope.
Claims (10)
1. a car passenger ferry for band energy-storage units hybrid electric propulsion system, including hull,
It is characterized in that: hull is provided with diesel generation parts, energy storage component, joins power supply part, pushes away
Enter parts, thruster part and control management parts；Diesel generation parts and energy storage component and join
Power supply part is connected, and joins power supply part and is connected with propulsive element and thruster part, advances
Parts are connected with thruster part, diesel generation parts, energy storage component, join power supply part,
Propulsive element is connected with control management parts respectively with thruster part；Diesel generation parts and
Bank is electrically accessed parts and is connected by switch forms with Ship Electrical Power System by permutator respectively；
Bank is electrically accessed parts and accesses Ship Electrical Power System when ship berthing, charges for energy storage component and is
The daily power supply of boats and ships, now diesel generation parts are not powered for Ship Electrical Power System.
2. the car visitor of band energy-storage units hybrid electric propulsion system as claimed in claim 1 crosses
Ship, it is characterised in that: diesel generation parts are set to generating set.
3. the car visitor of band energy-storage units hybrid electric propulsion system as claimed in claim 2 crosses
Ship, it is characterised in that: energy storage component is set to the power battery pack of ternary material.
4. the car visitor of band energy-storage units hybrid electric propulsion system as claimed in claim 3 crosses
Ship, it is characterised in that: join power supply part and be set to power distribution cabinet.
5. the car visitor of band energy-storage units hybrid electric propulsion system as claimed in claim 4 crosses
Ship, it is characterised in that: propulsive element is set to converter.
6. the car visitor of band energy-storage units hybrid electric propulsion system as claimed in claim 5 crosses
Ship, it is characterised in that: thruster part is set to electricity and drives full-rotating rudder paddle.
7. the car visitor of band energy-storage units hybrid electric propulsion system as claimed in claim 6 crosses
Ship, it is characterised in that: Control management system is power station power management system and rudder blade control system.
8. the car visitor of band energy-storage units hybrid electric propulsion system as claimed in claim 7 crosses
Ship, it is characterised in that: electricity drives full-rotating rudder paddle and is set to driven by power full circle swinging Z-type or L-type rudder
Oar.
9. the band energy-storage units hybrid electric propulsion system as according to any one of claim 1-8
The car passenger ferry of system, it is characterised in that: generating set includes three diesel-driven generators.
10. the car visitor of band energy-storage units hybrid electric propulsion system as claimed in claim 9 crosses
Ship, it is characterised in that: three diesel-driven generators there is a diesel-driven generator be set to standby generating
Machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610488980.3A CN105966590A (en) | 2016-06-28 | 2016-06-28 | Vehicle-passenger ferry provided with energy storage unit type hybrid electric propelling system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610488980.3A CN105966590A (en) | 2016-06-28 | 2016-06-28 | Vehicle-passenger ferry provided with energy storage unit type hybrid electric propelling system |
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| CN201610488980.3A Pending CN105966590A (en) | 2016-06-28 | 2016-06-28 | Vehicle-passenger ferry provided with energy storage unit type hybrid electric propelling system |
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| CN106364651A (en) * | 2016-10-10 | 2017-02-01 | 长沙绿航节能科技有限公司 | Comprehensive ship electric propelling system and using method |
| CN106741792A (en) * | 2016-12-01 | 2017-05-31 | 广州发展瑞华新能源电动船有限公司 | A kind of kiloton above electric ship |
| CN107697258A (en) * | 2017-09-26 | 2018-02-16 | 广船国际有限公司 | A kind of Ship Electrical Power System and its control method |
| CN109229325A (en) * | 2018-09-21 | 2019-01-18 | 上海船舶研究设计院（中国船舶工业集团公司第六0四研究院） | Mixing is to the power supply system and marine propuision system for turning gondola |
| CN109334937A (en) * | 2018-11-13 | 2019-02-15 | 中国船舶重工集团公司第七0四研究所 | Marine battery electric propulsion system and its control method |
| WO2019061803A1 (en) * | 2017-09-26 | 2019-04-04 | 广船国际有限公司 | Ship power system |
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Application publication date: 20160928 |