CN216508978U - Unmanned ship direct current network deployment electric propulsion system - Google Patents
Unmanned ship direct current network deployment electric propulsion system Download PDFInfo
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- CN216508978U CN216508978U CN202023204064.3U CN202023204064U CN216508978U CN 216508978 U CN216508978 U CN 216508978U CN 202023204064 U CN202023204064 U CN 202023204064U CN 216508978 U CN216508978 U CN 216508978U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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Abstract
The utility model discloses a direct-current networking electric propulsion system of an unmanned ship, wherein direct-current bus variable-frequency control power distribution system equipment comprises 2 rectifiers which are connected with a main diesel generator set; 2 inverters connected with the full-rotation rudder propeller motor; 1 inverter connected to bow pushing motor; 2 power inverters as power supplies of the daily distribution board; 2 choppers connected with the lithium iron phosphate battery pack; 1 rectifier connected with shore power supply; the direct current is connected with the busbar and the breaker and the fuse of the busbar; and the DC bus controls a controller in the cabinet body of the power distribution system in a frequency conversion manner. The direct-current bus variable-frequency control power distribution system comprises a power management system, a propulsion control system and a control management system of a ship daily power station. The unmanned ship direct-current networking electric propulsion system greatly reduces the floor area and weight of equipment, reduces harmonic and resonance risks, improves the technical compatibility of energy storage equipment, and improves the oil consumption and economy.
Description
Technical Field
The utility model relates to the technical field of unmanned ships, in particular to a direct-current networking electric propulsion system of an unmanned ship.
Background
To date, the engineering applications of integrated electric propulsion systems have gone through three stages of development: the system comprises a direct current electric propulsion system, an alternating current electric propulsion system and a direct current networking electric propulsion system. The direct-current networking electric propulsion system is the main form of the next generation electric propulsion system, and is widely popularized and applied to high-end ships at present. In the direct-current networking electric propulsion system, an alternating-current generator set is rectified and then is connected into a direct-current power grid, and the direct-current power grid is inverted and then drives an alternating-current propulsion motor or supplies power for a daily load.
The method integrates the green and environment-friendly electric propulsion system based on the direct-current networking technology into the unmanned ship, provides a new technical direction and a new implementation means in the aspects of energy conservation and emission reduction, and is an important way for solving the problems. Compared with manned ships, the unmanned ship does not need to carry operating personnel, and has the advantages that 1) the unmanned ship has strong maneuverability and can cover large-area sea areas, and 2) the unmanned ship can work for a long time and needs small supply; 3) The adaptability to severe marine environments is strong; 4) the sea area use can be dynamically monitored for 24 hours, and the waste of expenses caused by frequent movement of ships and personnel is avoided; 5) a personnel security system is not needed, and more task loads can be carried; 6) the high-resolution data acquisition influence capability is provided. However, the existing unmanned ship has the defects of low system integration level, heavy weight of electrical equipment, difficult overall arrangement, insufficient navigation speed, high navigation energy consumption, poor cruising ability, poor interface technology compatibility of energy storage equipment and the like, so that the operation of the unmanned ship on the sea surface is greatly limited.
SUMMERY OF THE UTILITY MODEL
The unmanned ship direct-current networking electric propulsion system provided by the utility model can solve the technical problems.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a unmanned ship direct current networking electric propulsion system comprises two main diesel generator sets and two groups of lithium iron phosphate battery packs, wherein the two main diesel generator sets and the two groups of lithium iron phosphate battery packs are connected with a power distribution system through direct current bus frequency conversion to carry out grid connection on a direct current bus, and drive two full-rotation rudder propeller motors and a bow side thrust motor;
controlling the rotating speed of a full-rotation rudder propeller motor through a frequency converter;
the motor transmits power to the steering oar input shaft through the shaft system, and the blades are driven to rotate through two pairs of spiral bevel gears and a transmission shaft in the steering oar to generate thrust so that the ship sails.
Further, the direct-current bus variable-frequency control power distribution system comprises two rectifiers which are connected with a main diesel generator set;
the two inverters are connected with the full-rotation rudder propeller motor; the inverter is connected with the bow side pushing motor; two power inverters as power supplies of the daily distribution board; the two choppers are connected with the lithium iron phosphate battery pack; the rectifier is connected with a shore power supply;
direct current connection is female arranges and circuit breaker and fuse thereof.
Further, the direct-current bus variable-frequency control power distribution system further comprises a controller in the cabinet body, a main diesel generating cabinet, a full-rotation rudder propeller motor driving cabinet, a bow side-push motor driving cabinet, a lithium iron phosphate battery pack chopping cabinet and a distributed sub-controller in a ship daily cabinet.
Further, the direct-current bus variable-frequency control power distribution system comprises a power management system, a propulsion control system and a control management system of a ship daily power station;
when the direct-current bus frequency conversion control power distribution system operates, all the cabinet bodies are connected through a common direct-current bus, and the operating states of all the power supply systems are managed through the power manager;
and the propulsion control system is responsible for receiving an operation instruction of the propulsion remote control system and driving the full-rotation rudder propeller motor and the bow side thrust motor through the frequency converter.
Further, direct current bus frequency conversion control distribution system's cabinet structure includes switch board, 1# main diesel generating set rectification/lithium iron phosphate group 1 chopper cabinet, 1# full gyration rudder propeller motor drive/daily power source drive cabinet of 1#, exchanges bank power supply/direct current cabinet/bow thrust motor drive cabinet 2# main diesel generating set rectification/lithium iron phosphate group 2 chopper cabinet, 2# full gyration rudder propeller motor drive/daily power source drive cabinet of 2 #.
Further, the daily power station control management system device comprises an AC380V distribution board, an AC220V distribution board, a charging and discharging board, an AC220V navigation equipment distribution box, a DC24V navigation aid distribution box and a marine daily transformer;
the AC380V distribution board is used for supplying power for 380V daily loads;
the AC220V distribution board is used for supplying 220V load power;
the charging and discharging plate is used for supplying electricity to the low-voltage equipment of the whole ship;
the AC220V navigation equipment distribution box is used for supplying power to AC220 navigation equipment;
the DC24V auxiliary distribution box is used for supplying power to DC24V auxiliary equipment;
the primary side rated voltage of the daily transformer for the ship is 380V, and the secondary side rated voltage of the daily transformer for the ship is 220V, and is used for driving daily power supply loads of the ship.
According to the technical scheme, the unmanned ship direct-current networking electric propulsion system has the following beneficial effects:
compared with the prior art, the utility model has the following advantages:
1. according to the utility model, by adopting a hybrid power system of the main diesel generator and the lithium iron phosphate battery pack, the characteristics of stability and reliability of the diesel generator, quick start and large current of the lithium iron phosphate battery pack can be comprehensively utilized, and different power equipment can be started according to different working conditions during the ship work, so that the aims of improving the efficiency, saving energy and reducing emission are achieved.
2. The direct-current electric power propulsion system has good economy by adopting the direct-current electric power propulsion system. Compared with the ship with the same power, the oil consumption is reduced by about 10 percent by adopting electric propulsion compared with diesel engine propulsion, the resistance of the ship body is reduced by 5 to 10 percent, the transportation efficiency is improved by 15 percent, and the navigational speed can be improved by 0.5 section. And the direct current networking electric propulsion system has the advantages of wide speed regulation range, large driving force, easiness in forward and reverse rotation, small size, flexibility in layout, convenience in installation and maintenance, low vibration and noise and the like.
3. The utility model adopts the full-rotation propeller, and can provide lossless vector propulsion in all directions, so the maneuverability is better.
4. By adopting the direct-current networking electric propulsion system, the utility model has the following remarkable advantages:
1) the occupied area and the weight of the equipment are greatly reduced, the integration level is higher, the volume and the weight of the whole system are greatly reduced due to the omission of a distribution board and a part of transformers, and compared with the traditional networking technology of an alternating current system, the volume and the weight can be saved by 30 percent and 40 percent;
2) the networking is in direct current connection, so that harmonic characteristics of the equipment cannot be influenced mutually, a whole-ship power grid cannot be influenced, and technical and construction risks of the system in the aspects of harmonic waves and resonance are obviously reduced compared with those of the traditional mode.
3) The direct current access of the power supply is simpler and more convenient, based on the power electronic technology, the direct current access is adopted, the weight and the size of the marine equipment are reduced, and the shore power supply can be more simply accessed to a direct current bus.
4) The main diesel generator of the direct-current networking can adjust the rotating speed according to different load conditions so as to ensure that the system works on an optimal energy consumption curve, thus improving the efficiency of the whole system and reducing energy consumption and emission. Compared with the traditional networking technology of an alternating current system, the overall efficiency improvement can reach 10% or even higher;
5) the direct-current networking technology has better technical compatibility with energy storage equipment such as batteries and the like, the interface of the equipment is simpler, and the volume and the weight of the corresponding interface equipment are obviously reduced; the access form, the main circuit, the structural design and the core device are completely the same, and the hardware passing rate reaches 95%. Compared with an alternating-current networking mode, the battery is also in direct-current output, the interface between the direct-current network and the battery is only a simple DC/DC chopper, the direct-current bus and the battery can be simply integrated in a direct-current bus variable-frequency control power distribution system, and the alternating-current networking mode needs an independent inverter of the battery, a corresponding transformer and a battery distribution panel in a distribution panel, so that the battery can be incorporated into a ship power grid.
5. According to the utility model, the lithium iron phosphate battery pack is adopted, so that a power supply is provided by the battery pack when ships enter and exit ports and are positioned in a dynamic mode, and the exhaust emission is reduced.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.
The unmanned ship direct current networking electric propulsion system is based on direct current bus variable frequency control power distribution system equipment, wherein the direct current bus variable frequency control power distribution system equipment comprises 2 rectifiers which are connected with a main diesel generator set; 2 inverters connected with the full-rotation rudder propeller motor; 1 inverter connected to bow pushing motor; 2 power inverters as power supplies of the daily distribution board; 2 choppers connected with the lithium iron phosphate battery pack; 1 rectifier connected with shore power supply; the direct current is connected with the busbar and the breaker and the fuse of the busbar; the controller (comprising a main controller in a control cabinet, a main diesel generating cabinet, a full-turning rudder propeller motor driving cabinet, a bow side-pushing motor driving cabinet, a lithium iron phosphate battery pack chopping cabinet and a distributed sub-controller in a ship daily cabinet) in the direct-current bus variable-frequency control power distribution system cabinet body.
The direct-current bus variable-frequency control power distribution system comprises a power management system, a propulsion control system and a control management system of a ship daily power station.
The direct current bus variable frequency control power distribution system cabinet structure is composed of a control cabinet, a 1# main diesel generator set rectification/lithium iron phosphate battery pack 1 chopper cabinet, a 1# full-rotation rudder propeller motor drive/1 # daily power supply drive cabinet, an alternating current bank power supply/direct current cabinet/bow side thrust motor drive cabinet, a 2# main diesel generator set rectification/lithium iron phosphate battery pack 2 chopper cabinet and a 2# full-rotation rudder propeller motor drive/2 # daily power supply drive cabinet.
When the direct-current bus frequency conversion control power distribution system operates, all the cabinet bodies are connected through a common direct-current bus, and the operating states of all power supply systems (a main diesel generator set and a lithium iron phosphate battery pack power station) are managed through a power manager; the propulsion control system is used for receiving an operation instruction of the remote control system, increasing the functions of instruction distribution, control protection and the like, and then driving the full-turning rudder propeller motor and the bow side thrust motor through the frequency converter; the lithium iron phosphate battery is equipped with a sufficient amount of charging equipment to be used in combination with and controlled by a battery management system.
The propulsion remote control system comprises a starboard main propulsion and bow-side propulsion combined control panel, a port main propulsion control panel, a port central control box and a starboard central control box.
The daily power station control management system device comprises an AC380V distribution board, an AC220V distribution board, a charging and discharging board, an AC220V navigation equipment distribution box, a DC24V navigation aid distribution box and a daily transformer of a ship.
The AC380V distribution board is used for supplying power for 380V daily loads; the AC220V distribution board is used for supplying 220V load power; the charging and discharging plate is used for supplying electricity to the low-voltage equipment of the whole ship; the AC220V navigation equipment distribution box is used for supplying power to AC220 navigation equipment; the DC24V auxiliary distribution box is used for supplying power to DC24V auxiliary equipment; the primary side rated voltage of the daily transformer for the ship is 380V, and the secondary side rated voltage of the daily transformer for the ship is 220V, and is used for driving daily power supply loads of the ship.
The following is further illustrated with reference to the accompanying drawings:
as shown in fig. 1, in the unmanned ship direct-current networking electric propulsion system according to this embodiment, 2 main diesel generator sets and 2 lithium iron phosphate battery packs are configured in the whole system, and a centralized direct-current bus variable-frequency control power distribution system is used for performing grid connection on a direct-current bus to drive 2 full-turning rudder propeller motors and 1 bow thrust motor. The rotating speed of the full-rotation motor is controlled through the frequency converter. The motor transmits power to the steering oar input shaft through the shaft system, and the blades are driven to rotate through two pairs of spiral bevel gears and a transmission shaft in the steering oar to generate thrust so that the ship sails. The underwater part of the steering oar can rotate freely in the range of 360 degrees, so that all-directional thrust is provided, and the course of the ship is changed.
Meanwhile, the direct-current bus variable-frequency control power distribution system provides a high-quality daily alternating-current power supply for daily loads of ships by using 2 mutually redundant daily transformers. The direct-current bus variable-frequency control power distribution system further comprises a more concise charging and discharging circuit of the lithium iron phosphate battery pack.
The whole system is provided with 1 shore power supply access unit, and power supplies are respectively provided for port and starboard when ships berth and land. The shore power supply can be used for charging the whole-ship lithium iron phosphate battery pack and providing power supply for daily loads.
The ship can be propelled by pure electric power when leaning on or leaving the wharf, and the ship can normally sail by adopting a main diesel generator set as a power source to propel, and can charge the lithium iron phosphate battery pack by utilizing the redundant power of the generator set.
A battery system for managing a lithium iron phosphate battery pack is characterized in that a battery management unit of the battery system firstly performs system self-check when in an operation mode, performs self-diagnosis aiming at a protection function period, and comprises various relay fault diagnosis, temperature sensor diagnosis, thermal management diagnosis and charging diagnosis, and prohibits starting and shutdown processing according to corresponding faults. And displaying and alarming sound and light aiming at faults exceeding the allowable threshold, simultaneously implementing safety protection action, limiting charge and discharge power or stopping, and feeding back serious faults to the power management system and stopping.
Similar to the ac networking system, the entire dc networking system can provide sufficient fault selectivity (also referred to as "electrical coordination") to ensure that the system can maintain the maximum normal operation of other devices in the event of equipment failure, cable short circuit, and the like. If the daily load of the ship is short-circuited, the frequency converter has enough short-circuit current supporting capacity, the current lasts for enough time, and the circuit breaker or the fuse in the load loop can be selectively triggered to meet the ship performance requirement.
The whole system can realize the following control functions: the full-rotation rudder propeller motor is started, stopped and scrammed, so that the starting and stopping functions of the full-rotation rudder propeller motor are realized, and the quick scram function can be realized in an emergency; the torque control and the speed control of the full-turning rudder propeller motor realize the torque output or rotating speed control function of the full-turning rudder propeller motor; the side power control of the main diesel generator set realizes the power control and power distribution of the controllable insulated gate bipolar transistor rectification of the main diesel generator set; controlling the power of the lithium iron phosphate battery pack: the system is communicated with a lithium iron phosphate battery pack management system in real time, so that the power control and the power distribution of the charging power and the discharging power of the lithium iron phosphate battery pack are realized; the direct current bus control is used for realizing the voltage control of the direct current bus; constant-frequency and constant-voltage output control is carried out, and power frequency voltage and frequency output of a ship power supply load on the side of the daily transformer are realized; the shore power supply is controlled to realize the access of the shore power supply, the shore power supply can be used for supplying power to daily loads of ships and charging the lithium iron phosphate battery pack; the anti-cold and warm heating function can start the anti-condensation heater according to the running condition, thereby preventing the generation of condensation in the system.
The above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. The utility model provides an unmanned ship direct current network deployment electric propulsion system which characterized in that: two main diesel generator sets and two lithium iron phosphate battery packs are configured, and are connected to a direct current bus through a direct current bus variable frequency control power distribution system to drive two full-rotation rudder propeller motors and a bow side thrust motor;
controlling the rotating speed of a full-rotation rudder propeller motor through a frequency converter;
the full-rotation rudder propeller motor transmits power to a rudder propeller input shaft through a shaft system, and the blades are driven to rotate through two pairs of spiral bevel gears and transmission shafts in the rudder propeller to generate thrust so that the ship sails.
2. The unmanned marine dc grid-connected electric propulsion system of claim 1, wherein: the direct-current bus variable-frequency control power distribution system comprises two rectifiers which are connected with a main diesel generator set;
the two inverters are connected with the full-rotation rudder propeller motor; the inverter is connected with the bow side pushing motor; two power inverters as power supplies of the daily distribution board; the two choppers are connected with the lithium iron phosphate battery pack; the rectifier is connected with a shore power supply;
direct current connection is female arranges and circuit breaker and fuse thereof.
3. The unmanned marine dc grid-connected electric propulsion system of claim 2, wherein: the direct-current bus variable-frequency control power distribution system further comprises a controller, a power generation cabinet, a full-rotation rudder propeller cabinet, a battery chopping cabinet and a distributed sub-controller in a ship daily cabinet, wherein the controller, the power generation cabinet, the full-rotation rudder propeller cabinet, the battery chopping cabinet and the distributed sub-controller are arranged in the cabinet body.
4. The unmanned marine direct current networking electric propulsion system of claim 3, wherein: the direct-current bus variable-frequency control power distribution system comprises a power management system, a propulsion control system and a control management system of a ship daily power station;
when the direct-current bus frequency conversion control power distribution system operates, all the cabinet bodies are connected through a common direct-current bus, and the operating states of all the power supply systems are managed through the power manager;
and the propulsion control system is responsible for receiving an operation instruction of the propulsion remote control system and driving the full-rotation rudder propeller motor and the bow side thrust motor through the frequency converter.
5. The unmanned marine dc grid-connected electric propulsion system of claim 1, wherein: the cabinet structure of the direct-current bus variable-frequency control power distribution system comprises a control cabinet, a 1# main diesel generator set rectification/lithium iron phosphate battery pack 1 chopper cabinet, a 1# full-rotation rudder propeller motor drive/1 # daily power supply drive cabinet, an alternating-current shore power supply/direct-current cabinet/bow side thrust motor drive cabinet, a 2# main diesel generator set rectification/lithium iron phosphate battery pack 2 chopper cabinet and a 2# full-rotation rudder propeller motor drive/2 # daily power supply drive cabinet.
6. The unmanned marine direct current networking electric propulsion system of claim 4, wherein:
the daily power station control management system device comprises an AC380V distribution board, an AC220V distribution board, a charging and discharging board, an AC220V navigation equipment distribution box, a DC24V navigation aid distribution box and a daily transformer of a ship;
the AC380V distribution board is used for supplying power for 380V daily loads;
the AC220V distribution board is used for supplying 220V load power;
the charging and discharging plate is used for supplying electricity to the low-voltage equipment of the whole ship;
the AC220V navigation equipment distribution box is used for supplying power to AC220 navigation equipment;
the DC24V auxiliary distribution box is used for supplying power to DC24V auxiliary equipment;
the primary side rated voltage of the daily transformer for the ship is 380V, and the secondary side rated voltage of the daily transformer for the ship is 220V, and is used for driving daily power supply loads of the ship.
7. The unmanned marine direct current networking electric propulsion system of claim 4, wherein: the propulsion remote control system comprises a starboard main propulsion and bow-side propulsion combined control panel, a port main propulsion control panel, a port central control box and a starboard central control box.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115498622A (en) * | 2022-11-07 | 2022-12-20 | 中国人民解放军海军工程大学 | Direct-current integrated power system of electric-electric hybrid ship and control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115498622A (en) * | 2022-11-07 | 2022-12-20 | 中国人民解放军海军工程大学 | Direct-current integrated power system of electric-electric hybrid ship and control method |
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Hefei Manta Intelligent Technology Co.,Ltd. Assignor: HEFEI INNOVATION RESEARCH INSTITUTE, BEIHANG University Contract record no.: X2022980017628 Denomination of utility model: A DC Network Electric Propulsion System for Unmanned Ship Granted publication date: 20220513 License type: Exclusive License Record date: 20221011 |
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| EE01 | Entry into force of recordation of patent licensing contract |